Autor: Klasztorny, M. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Wpływ losowych nierówności toru na drgania wybranego układu most zespolony / nawierzchnia kolejowa / pociąg szybkobieżny
Effect of random track irregularities on selected composite bridge / track structure / high-speed train system vibrations
Autorzy:: Podwórna, M.
Klasztorny, M.
Powiązania:: https://bibliotekanauki.pl/articles/389886.pdf
Data publikacji:: 2013
Wydawca:: Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej
Tematy:: most zespolony
nawierzchnia kolejowa podsypkowa
pociąg szybkobieżny ICE-3
losowe nierówności toru
modelowanie
symulacja
badania numeryczne
steel concrete composite bridge
ballasted track structure
ICE-3 high–speed train
random track irregularities
modelling
simulation
numerical analysis
Opis:: Opracowano quasi-ścisłą teorię modelowania jednowymiarowego (1D), fizycznego i matematycznego, układu most zespolony / nawierzchnia kolejowa podsypkowa / pociąg szybkobieżny (BTT), przy uwzględnieniu lepkosprężystych zawieszeń pojazdów szynowych na dwuosiowych wózkach jezdnych, nieliniowej sztywności kontaktowej Hertza i jednostronnego kontaktu między zestawami kołowymi a szynami, cech lepkosprężystych i bezwładnościowych mostu, lepko sprężystej nawierzchni kolejowej na moście i poza mostem, płyt przejściowych i losowych nierówności toru. Na podstawie tej teorii opracowano zaawansowane algorytmy komputerowe modelowania numerycznego układów BTT oraz program komputerowy do symulacji drgań pionowych tych układów. W ramach wstępnych badań dynamicznych rozważono most zaprojektowany zgodnie z polskimi normami, o rozpiętości teoretycznej przęsła 15,00 m, oznaczony kodem SCB-15. Most obciążono niemieckim pociągiem szybkobieżnym ICE-3, poruszającym się z prędkością krytyczną (270 km/h) i maksymalną (300 km/h).
A theory of the quasi-exact physical and mathematical modelling of the composite (steel–concrete) bridge / ballasted track structure / high-speed train system (BTT) was developed, including viscoelastic suspensions of rail-vehicles on two-axle bogies, the non-linear Hertz contact stiffness and one-sided contact between the wheel sets and the rails, the viscoelastic and inertia features of the bridge, the viscoelastic track structure on and beyond the bridge, the approach slabs, and random track irregularities. Based on this theory, advanced computer algorithms for the BTT numerical modelling were written and a computer program to simulate the vertical vibrations of the BTT systems was developed. The bridge subject to the preliminary dynamic analysis and designed according to Polish standards has a 15.00 m span length. The bridge was loaded by the German ICE-3 high-speed train moving at the critical (180 and 270 km/h) and the maximum (300 km/h) operating speeds.
Źródło:: Budownictwo i Architektura; 2013, 12, 1; 259-266
1899-0665
Pojawia się w:: Budownictwo i Architektura
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Vertical vibrations of composite bridge/track structure/high-speed train systems. Part 3: Deterministic and random vibrations of exemplary system
Autorzy:: Podworna, M.
Klasztorny, M.
Powiązania:: https://bibliotekanauki.pl/articles/201818.pdf
Data publikacji:: 2014
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: composite steel-concrete bridge
ballasted track structure
high-speed train
design
simulation
numerical analysis
Opis:: Based on the one-dimensional quasi-exact physical and mathematical modelling of a composite (steel-concrete) bridge/track structure/high-speed train system (BTT), developed in Part 2, advanced computer algorithms for the BTT numerical modelling and simulation as well as a computer programme to simulate vertical vibrations of BTT systems are developed. The exemplary bridge under numerical quasi-static and dynamic analysis, designed according to Polish standards, has a 15.00 m span length and belongs to the SCB series-of-types developed in Part 1. The bridge is loaded by a German ICE-3 high-speed train moving at the resonant and maximum operating speeds. A continuously welded ballasted track structure adapted to high operating velocities is applied. The output quantities include: time-histories of the vertical deflection of the main beams at the midspan, time-histories of the longitudinal normal stress in the bottom fibres of the main beams at the midspan, time-histories of the vertical acceleration of the bridge deck at the midspan, time-histories of the vertical accelerations of the suspension pivots in car-bodies, time-histories of the dynamic pressures of the wheel sets of moving rail-vehicles. The design quantities, understood as the extreme values of the output quantities, are used to verify the design conditions. The basic random factor, i.e. vertical track irregularities of the track, is taken into consideration. Basic statistics of the design quantities treated as random variables are calculated and taken into account in the design conditions.
Źródło:: Bulletin of the Polish Academy of Sciences. Technical Sciences; 2014, 62, 2; 305-320
0239-7528
Pojawia się w:: Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Vertical vibrations of composite bridge/track structure/high-speed train systems. Part 2: Physical and mathematical modelling
Autorzy:: Podworna, M.
Klasztorny, M.
Powiązania:: https://bibliotekanauki.pl/articles/200194.pdf
Data publikacji:: 2014
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: composite steel-concrete bridge
ballasted track structure
high-speed train
random track irregularities
FE modelling
equations of motion
Opis:: A theory of one-dimensional physical and mathematical modelling of the composite (steel-concrete) bridge/track structure/highspeed train system is developed including viscoelastic suspensions of rail-vehicles with two two-axle bogies each, non-linear Hertz contact stiffness and one-sided contact between wheel sets and rails, the viscoelastic and inertia features of the bridge, the viscoelastic track structure on and beyond the bridge, approach slabs, and random vertical track irregularities. Compared to the state-of-the-art, the physical model developed in the study accurately reproduces dynamic processes in the considered system. Division of the system into the natural subsystems, a method of formulation of the equations of motion partly in implicit form and the finite element method are applied. Vibrations in the vertical plane of symmetry are described by more than nine matrix equations of motion with constant coefficients. Couplings and non-linearity are hidden in the generalized load vectors. The equations of motion are integrated using the implicit Newmark average acceleration method with linear extrapolation of the interactions between the subsystems.
Źródło:: Bulletin of the Polish Academy of Sciences. Technical Sciences; 2014, 62, 1; 181-196
0239-7528
Pojawia się w:: Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Vertical vibrations of composite bridge/track structure/high-speed train systems. Part 1: Series-of-types of steel-concrete bridges
Autorzy:: Podworna, M.
Klasztorny, M.
Powiązania:: https://bibliotekanauki.pl/articles/202151.pdf
Data publikacji:: 2014
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: composite steel-concrete bridge
ballasted track structure
high-speed train
design
FE modelling
simulation
forced resonances
numerical analysis
Opis:: A new series-of-types of single-span simply-supported railway composite (steel-concrete) bridges, with a symmetric platform, has been designed according to the Polish bridge standards. The designed bridges/viaducts are located on the main railways of the classification coefficient k = +2. A ballasted track structure adapted to high operating speeds has also been designed. The ultimate limit states and the limit states corresponding to the bridges undertaken are collected and discussed. The bridges have been designed in accordance with contemporary art engineering, with geometric and material optimization, avoiding overdesign. A new methodology of numerical modelling and simulation of dynamic processes in composite bridge/ballasted track structure/high speed train systems, developed in Part 2 and Part 3, has been applied and implemented in a problem-oriented computer programme. A new approach to predicting forced resonances in those systems is formulated and tested numerically. It has been proved that in the case of typical structural solutions of bridges and ballasted track structures, it is necessary to introduce certain limitations for operating speeds of trains.
Źródło:: Bulletin of the Polish Academy of Sciences. Technical Sciences; 2014, 62, 1; 165-179
0239-7528
Pojawia się w:: Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: The HWKK rheological model for resins
Model reologiczny HWKK dla żywic
Autorzy:: Klasztorny, M.
Gieleta, R.
Powiązania:: https://bibliotekanauki.pl/articles/281171.pdf
Data publikacji:: 2002
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: polymers
resins
constitutive equations of viscoelasticity
material constans
Opis:: A rheological model for epoxy and polyester resins, denoted with the symbol HWKK, has been developed and positively validated for selected loading programmes. This model describes the first-rank reversible creep of amorphous tyermohardened polymers with good accuracy. The mechanical HWKK model consists of four elements connected in series, formulated by Hooke, Wilczyński and Kelvin. Constitutive equations of viscoelasticity for the HWKK model have been formulated, with fractional and normal exponential functions used as the generating ones. An algorithm for identification of the material constants, based on creep experiments of bar samples uniaxially tensioned, has been developed. The material constants have been identified for epoxy and polyester resins.
Opracowano nowy model reologiczny żywicy epoksydowej i poliestrowej, oznaczony symbolem HWKK. Przeprowadzono walidację tego modelu dla wybranych programów obciążenia, uzyskując pozytywne wyniki. Model HWKK opisuje z dobrą dokładnośćią pełzanie pierwszorzędowe odwracalne polimerów amorficznych termoutwardzalnych. Model ten jest odwzorowany przez cztery elementy mechaniczne połączone szeregowo typu Hooke'a, Wilczyńskiego i Kelvina. Sformułowana równania konstytutywne lepkosprężystości i modelu HWKK stosując jako funkcje tworzące jedną funkcję wykładniczą ułamkową oraz dwie funkcje wykładnicze zwykłe. Opracowano algorytm identyfikacji stałych materiałowych opisujących model HWKK, bazujący na eksperymentach pełzania próbek prętowych rozciąganych osiowo. Stałe te zidentyfikowano dla żywicy epoksydowej i poliestrowej.
Źródło:: Journal of Theoretical and Applied Mechanics; 2002, 40, 4; 939-960
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Rubber/Foam/Composite Overlay onto Guide B of Barrier Located on Road Bend
Nakładka kompozytowo-pianowo-gumowa na prowadnicę B bariery na łuku drogi
Autorzy:: Klasztorny, M.
Nycz, N. B.
Romanowski, R. K.
Powiązania:: https://bibliotekanauki.pl/articles/1364045.pdf
Data publikacji:: 2015
Wydawca:: Sieć Badawcza Łukasiewicz. Przemysłowy Instytut Motoryzacji
Tematy:: curved road barrier
horizontal concave arch
rubber/foam/composite overlay
TB11 crash test
modelling
simulation
bariera drogowa w łuku
łuk poziomy wklęsły
nakładka kompozytowo-pianowo-gumowa
test zderzeniowy TB11
modelowanie
symulacja
Opis:: The paper examines the SP-05/2 outer barrier of the N2-W4-A class (the producer: Stalprodukt JSC, Bochnia) with the B-type guide bar, located on a horizontal arch to an accelerated traffic main road (Polish code: GP), with the allowable radius of the road axis belonging to the range of 140–220 m. In order to ensure accepting the TB11 crash test, a rubber/foam/composite overlay has been designed, which was combined with the B guide bar with screw connectors using only the empty holes in the guide axis, at 2.00 m intervals. The overlay is flame retardant, resistant to weathering and required chemical effects, increases flexibility and strength of the barrier, reduces vehicle–barrier friction, and its estimated durability is 30 years. The study develops a method for numerical modelling and simulation of the unmodified (a straight barrier) and modified (a barrier in a horizontal concave arch) TB11 crash test, without and with the overlay, including deformable joints with limited load capacity, contact with friction, tire pressure, posts embedded in deformable subsoil, gravity load, damping, et al. TB11 virtual crash tests have been conducted for the four above-mentioned barrier design systems. The Geo Metro (Suzuki Swift) car model, corrected respectively, has been taken from the public library developed by the National Crash Analysis Center, USA. Crash tests were simulated using the non-linear explicit finite element code LS-Dyna v971. The results include all the collision parameters required by the EN 1317 standard. It has been proved that the SP-05/2 barrier with the overlay, located on GP road bends, provides acceptance of the TB11 crash test.
W pracy rozpatruje się barierę skrajną SP-05/2 klasy N2-W4-A (producent Stalprodukt SA, Bochnia) z prowadnicą typu B, na łuku poziomym drogi głównej ruchu przyspieszonego (GP), o promieniu dopuszczalnym w osi drogi 140-220m. W celu zapewnienia przyjęcia testu zderzeniowego TB11 zaprojektowano nakładkę kompozytowo–pianowo–gumową, którą połączono z prowadnicą B za pomocą złączy śrubowych, z wykorzystaniem tylko wolnych otworów w osi prowadnicy, występujących co 2,00m. Nakładka jest uniepalniona, odporna na czynniki atmosferyczne i wymagane chemiczne, zwiększa elastyczność i wytrzymałość bariery, zmniejsza tarcie między pojazdem a barierą, a jej trwałość wynosi 30 lat. Opracowano metodykę modelowania numerycznego i symulacji niezmodyfikowanego (bariera prostoliniowa) i zmodyfikowanego (bariera w łuku poziomym wklęsłym) testu zderzeniowego TB11, bez nakładki oraz z nakładką, z uwzględnieniem złączy podatnych o ograniczonej nośności, kontaktu z tarciem, ciśnienia w oponach, zamocowania słupków w odkształcalnym podłożu, obciążenia grawitacyjnego, tłumienia drgań i in. Przeprowadzono wirtualne testy zderzeniowe TB11 w odniesieniu do czterech ww. układów konstrukcyjnych bariery. Model pojazdu Suzuki Swift, odpowiednio poprawiony, zaczerpnięto z biblioteki publicznej National Crash Analysis Center w USA. Do symulacji testów zderzeniowych zastosowano nieliniowy jawny kod Metody Elementów Skończonych LS-Dyna v971. Wyniki obejmują wszystkie parametry zderzenia wymagane przez normy PN-EN 1317. Wykazano, że bariera SP-05/2 z nakładką na łukach dróg GP zapewnia przyjęcie badania zderzeniowego TB11.
Źródło:: Archiwum Motoryzacji; 2015, 69, 3; 65-86
1234-754X
2084-476X
Pojawia się w:: Archiwum Motoryzacji
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Numerical Modelling, Simulation and Validation of the SPS and PS Systems under 6 kg TNT Blast Shock Wave
Autorzy:: Świerczewski, M.
Klasztorny, M.
Dziewulski, P.
Gotowicki, P.
Powiązania:: https://bibliotekanauki.pl/articles/386965.pdf
Data publikacji:: 2012
Wydawca:: Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:: pojazd wojskowy
fala uderzeniowa
symulacja cyfrowa
test
military vehicle
passive shield
range stand
protected plate
blast shock wave
numerical modelling
simulation
range tests
validations
Opis:: The paper develops a new methodology of FE modelling and simulation of the SPS and SP systems under 6 kg TNT blast shock wave. SPS code refers to the range stand – protected plate – protective shield ALF system, while PS code refers to the range stand – protected plate system. The multiple – use portable range stand for testing protective shields against blast loadings was developed under Research and Development Project No. O 0062 R00 06. System SPS uses high strength M20 erection bolts to connect the protective shield to the protected plate. In reference to the SPS system, validation explosion test was performed. It has pointed out that the developed methodology of numerical modelling and simulation of SPS and PS systems, using CATIA , HyperMesh, LS-Dyna, and LS-PrePost software, is correct and the ALF protective shield panels have increased blast resistance and high energy – absorption capability
Źródło:: Acta Mechanica et Automatica; 2012, 6, 3; 77-87
1898-4088
2300-5319
Pojawia się w:: Acta Mechanica et Automatica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Numerical modelling and validation of 12.7 MM FSP impact into ALFC shield - ARMOX 500T steel plate system
Autorzy:: Klasztorny, M.
Świerczewski, M.
Powiązania:: https://bibliotekanauki.pl/articles/242187.pdf
Data publikacji:: 2012
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: light armoured vehicles
passive protection
IED
FSP
numerical modelling
simulation
validation
Opis:: The study develops a methodology for numerical modelling and simulation of a 12.7 mm 13.4 g FSP fragment impact into the ALFC shield – ARMOX 500T steel plate system. The ALFC shield is composed of the ALF energyabsorbing subsystem and a 10 mm-thick 99,7% Al2O3 alumina ceramic layer. The ALF subsystem is designed to absorb blast wave impact energy induced by explosive materials up to 10 kg TNT. The ceramic layer is designed to stop fragments from IED explosion. The 5 mm-thick Armox 500T steel plate constitutes the body bottom segment of a light armoured vehicle. The ALF subsystem has the following layered structure: Al2024 aluminium alloy plate, SCACS hybrid laminate plate, ALPORAS aluminium foam, SCACS hybrid laminate plate. The layers are joined with Soudaseal 2K chemoset glue. SCACS hybrid laminate contains the following components: VE 11-M modified vinylester resin (matrix), SWR800 S-glass plain weave fabric, Tenax HTA40 6K carbon plain weave fabric, Kevlar 49 T 968 aramid plain weave fabric. The total thickness of the ALFC shield amounts to 90 mm. Proof ground tests of a 12.7 mm 13.4 g FSP fragment impact into the ALFC shield - ARMOX 500T steel plate system have been performed at impact velocity 715 m/s and used for experimental validation of numerical modelling and simulation. In the numerical modelling, the aluminium alloy plate and Armox 500T steel plate are working in the elasto-plastic range according to Johnson-Cook model. The 99.7% Al2O3 alumina ceramic is working in elasto-short range according to JH-2 Johnson-Holmquist model. The simulations correspond to large displacements, large deformations and potential contact among all the components of the system. In FE mesh, the 8-node 24 DOF hexahedral finite elements with single integration point have been used. Failure criteria governing ad-hoc erosion of finite elements have been applied. The FEM modelling, simulation and postprocessing have been carried out using Catia, HyperMesh, LS-DYNA and LS-PrePost systems. The simulation results in the form of displacement/penetration contours and the FSP final deformation have been compared with the experimental results.
Źródło:: Journal of KONES; 2012, 19, 4; 291-299
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Numerical Modelling and Experimental Verification of Glass-Polyester Mixed Laminate Beam Bending Test
Autorzy:: Bondyra, A.
Klasztorny, M.
Szurgott, P.
Gotowicki, P.
Powiązania:: https://bibliotekanauki.pl/articles/387011.pdf
Data publikacji:: 2012
Wydawca:: Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:: zginanie belek
analiza numeryczna
MES (metoda elementów skończonych)
metoda elementów skończonych
weryfikacja doświadczalna
GRRP shells
beam bending test
FEM numerical modelling
experimental verification
Opis:: The subject undertaken in the study is a glass (fibre) – polyester (matrix) layered composite, of the mixed sequence, composed alternately of laminas reinforced with E-glass plain weave fabric (WR600) and E-glass mat (CSM450). The laminate is manufactured on Polimal 104 polyester matrix. The aim of the study is to determine the options/values of parameters for numerical modelling and simulation of static processes in shell structures made of glass-polyester composites undertaken, in MSC.Marc system, recommended in engineering calculations. The effective elastic and strength constants of homogeneous laminas have been determined experimentally according to the standard procedures. The bending test of composite beams has been conducted experimentally and simulated numerically. Numerical investigations have been focused on selection of options/values of the numerical modelling and simulation parameters. The experimental verification of numerical modelling of the bending test is positive in both the quasi-linear range and in the catastrophic – progressive failure zone.
Źródło:: Acta Mechanica et Automatica; 2012, 6, 3; 1-18
1898-4088
2300-5319
Pojawia się w:: Acta Mechanica et Automatica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Numerical modelling and design of ALFC shield loaded by 20 MM FSP fragment
Autorzy:: Klasztorny, M.
Świerczewski, M.
Dziewulski, P.
Morka, A.
Powiązania:: https://bibliotekanauki.pl/articles/241865.pdf
Data publikacji:: 2012
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: light armoured vehicles
passive protection
IED
FSP
modelling
simulation
design
Opis:: The study develops numerical modelling and design of the ALFC shield loaded by the 20 mm 54 g FSP fragment moving at impact velocity of 1800 m/s (fragmentation simulation of IED devices), used to protect 5 mm-thick Armox 500T steel plate. The ALFC shield is composed of the ALF energy-absorbing subsystem and a 99.7% Al2O3 alumina ceramic layer. The ALF subsystem is designed to absorb blast wave impact energy induced by explosive materials up to 10 kg TNT. The ceramic layer is aimed at stopping FSP fragments. The 5 mm-thick Armox 500T steel plate reflects the body bottom segment of a light armoured vehicle. The main purpose of the study is to determine the minimum thickness of the ceramic layer at which the 5 mm-thick Armox 500T steel plate is fully protected from perforation. The ALF subsystem has the following layered structure: Al2024 aluminium alloy plate, SCACS hybrid laminate plate, ALPORAS aluminium foam, SCACS hybrid laminate plate. The layers are joined with Soudaseal 2K chemoset glue. SCACS hybrid laminate contains the following components: VE 11-M modified vinylester resin (matrix), SWR800 glass S plain weave fabric, Tenax HTA40 6K carbon plain weave fabric, Kevlar 49 T 968 aramid plain weave fabric. The total thickness of the ALF shield amounts to 76 mm. In the numerical modelling, the aluminium alloy plate and Armox 500T steel plate are working in the elasto-plastic range according to Johnson–Cook model. The 99.7% Al2O3 alumina ceramic is working in elasto--hort range according to JH-2 Johnson-Holmquist model. The simulations correspond to large displacements, large deformations and contact among all the components of the system. In FE mesh, the 8-node 24 DOF hexahedral finite elements with single integration point have been used. Additional failure criteria governing ad-hoc erosion of finite elements have been applied. The FEM modelling, simulation and postprocessing have been carried out using Catia, HyperMesh, LS-DYNA and LS-PrePost systems. The simulation results are presented in the form of displacement - perforation contours and the FSP final deformation for both the FSP–shield-plate and the FSP-plate systems. It has been pointed out that 18 mm-thick ceramic layer protects the LAV body bottom plate from perforation.
Źródło:: Journal of KONES; 2012, 19, 4; 301-313
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Numerical analysis of I-beam supporting structure with multimaterial protective panel - parametric study
Autorzy:: Damaziak, K.
Mazurkiewicz, Ł.
Małachowski, J.
Klasztorny, M.
Baranowski, P.
Powiązania:: https://bibliotekanauki.pl/articles/246508.pdf
Data publikacji:: 2012
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: ALE formulation
blast wave
dynamic response
protective panel
Opis:: Dynamic response of an I-beam supporting structure subjected to shock wave produced by the detonation of high explosive materials is presented in this paper. Dynamic response of structural components in different load cases-with multimaterial panel protection and without protection, subjected to blast wave from various charge weight and various distance stand-off was determined. LS-DYNA, a 3-D explicit, finite element computer code with Lagrangian-Eulerian coupling was used to study this behaviour. Also initial static load was taken into account as pre-stress field present in the column obtained using dynamic relaxation procedure. The protective panel is composed of fibreglass composite and aluminium foam. The composite orthotropic properties and the failure criteria for fibre and matrix damage as well as the stress-volumetric strain curve for metallic foam were taken into account. The previous study shows that critical to the structure durability are the plastic strains and the structure failure caused by high deformation. Results of the analyses indicate that application of the blast panel around the supporting structure increase the resistance and significantly reduce the plastic deformation of the structure. The pillar without protection can be destroyed by 2 kg TNT placed close to the structure. Analysed beam covered by the blast panel can resist over three times bigger charge without significant deformation of the structure.
Źródło:: Journal of KONES; 2012, 19, 3; 93-102
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Modelowanie i symulacja numeryczna wężykowania szybkobieżnego pojazdu szynowego Shinkansen na torze prostoliniowym
Modelling and numerical simulation of snaking of a high-speed Shinkansen rail-vehicle moving on a rectilinear track
Autorzy:: Klasztorny, M.
Niezgoda, T.
Dziewulski, P.
Powiązania:: https://bibliotekanauki.pl/articles/208662.pdf
Data publikacji:: 2011
Wydawca:: Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
Tematy:: dynamika pojazdów
pojazd szynowy Shinkansen
tor prostoliniowy
wężykowanie
modelowanie
symulacja numeryczna
dynamics of vehicles
Shinkansen rail-vehicle
rectilinear track
snaking
modelling
numerical simulation
Opis:: W pracy opracowano model dynamiczny 3D (fizyczny, geometryczny i numeryczny) japońskiego szybkobieżnego pojazdu szynowego SHINKANSEN poruszającego się po torze prostoliniowym niepodatnym, o stożkowatości szyn 1:20. Opracowano metodykę modelowania układu pojazd ruchomy-szyny (MV-R) oraz modelowania wężykowania z możliwością uderzeń bocznych obrzeży kół o główki szyn. Zastosowano licencjonowane oprogramowanie CATIA V5R15, HYPERMESH v10, LS-DYNA v971. Przeprowadzono badania symulacyjne wężykowania pojazdu SHINKANSEN w zakresie prędkości 100-300 km/h. Większość podukładów układu pojazd ruchomy-szyny (MV-R) zamodelowano jako bryły idealnie sztywne. Stalowe obręcze kół pojazdu oraz górne części stalowych główek szyn zamodelowano jako odkształcalne i wykonane z materiału izotropowego liniowo-sprężystego. Łożyska osi zestawów kołowych pojazdu SHINKANSEN zamodelowano za pomocą więzów CONSTRAINED_JOINT_REVOLUTE. Uwzględniono kontakt pomiędzy obręczami kół i główkami szyn typu AUTOMATIC_SINGLE_SURFACE, z zastosowaniem funkcji kary. Uwzględniono tarcie kinetyczne Coulomba na styku powierzchni tocznych i obrzeży obręczy kół i główek szyn. Analizowano przyspieszenia poziome poprzeczne reprezentatywnych punktów nadwozia oraz przemieszczenia poziome poprzeczne środków ciężkości zestawów kołowych.
The study develops the 3D dynamic model (physical, geometrical, and numerical) of a high-speed Shinkansen rail-vehicle moving on a rectilinear track of 1:20 rail-head conicity. A new methodology has been developed for modelling the moving vehicle-rails system (MV-R) as well as for modelling lateral vibrations of the vehicle, induced by snaking and possible impacts of wheel flanges onto rail heads. Advanced licensed CAE software has been applied, i.e., CATIA V5R15, HYPERMESH v10, and LS-DYNA v971. Numerical simulations have been performed for service velocities of a Shinkansen rail-vehicle ranged from 150 to 300 km/h. The partial geometric model of the MV-R system has been created with CATIA V5R15 software, using the Assembly Design, Part Design, Generative Shape Design modules. The geometric model in the universal form (the STEP file) has been carried into HYPERMESH v10 system in order to build the complete equivalent geometric model, to make FEM meshing, and to declare the initial and boundary conditions. Most subsystems have been modelled in LS-DYNA v971 as rigid bodies (MAT_020). Tyres and the rail heads are deformable and made of linear-elastic isotropic steel (MAT_001). Radial bearings of wheel-set axles have been modelled with CONSTRAINED_JOINT_REVOLUTE, as shown in Figure 1. The 1st and 2nd stage 3D linearly-viscoelastic suspensions (MAT_066) have been reflected with the zero-length elements of properties SECTION_BEAM, in Discrete Beam formulation. In order to activate gravity forces, the FE locations have been removed to the predicted final static state, and then the gravity forces reflecting the total weight of the vehicle have been put onto the wheel-set axle-bearing cases. After the dynamic relaxation process, all elements of the body and bogie frames had got the initial velocity in the longitudinal direction (coinciding the track axis), whereas the rotating parts (wheels and axles) had got the angular velocity about respective axle axes. In order to keep the constant service velocity, all wheel sets had got a constant angular velocity. In order to unbalance the rail-vehicle, the body has been loaded by lateral moment impact of rectangular shape and of 22 kNms value. The tyre-rail head contact of AUTOMATIC_SINGLE_SURFACE type has been used taking into account the penalty function. The kinetic dry friction coefficient is equal to 0.10. The average time step was equal to dt = 1.23 μs. The calculations in the LS-DYNA system have been performed using double precision. The real process lasting 7.2 seconds was simulated numerically for 104 hours, using 8 processors of the cluster. The final results constitute: lateral displacements and accelerations of the representative points of the body and the lateral displacements of the gravity centres of the wheel sets. Exemplary time histories are presented in the study. The main conclusions resulting from numerical simulations are as follows. The CAE software used in the study is a very effective tool for 3D numerical simulations of the MV-R system taking into consideration a curvilinear cross-section of the rail heads, the one-side contact of wheels and rails and the Coulomb friction. The simulations show that anti-symmetric unbalance rapidly tends to stable symmetric lateral vibrations of the bogies of frequency depended on the service velocity. The lateral vibration frequencies belong to the interval 1.7-4.2 Hz.
Źródło:: Biuletyn Wojskowej Akademii Technicznej; 2011, 60, 1; 309-324
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Pojawia się w:: Biuletyn Wojskowej Akademii Technicznej
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: Modelowanie i symulacja numeryczna drgań młota udarowego RG-1
Modelling and numerical simulation of RG-1 spring stroke hammer
Autorzy:: Klasztorny, M.
Niezgoda, T.
Gieleta, R.
Talarek, P.
Powiązania:: https://bibliotekanauki.pl/articles/211218.pdf
Data publikacji:: 2010
Wydawca:: Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
Tematy:: dynamika maszyn
młot udarowy
elementy energochłonne
wibroizolacja
modelowanie
symulacja numeryczna
dynamics of machines
stroke hammer
energy absorbing elements
vibroisolation
modelling
numerical simulation
Opis:: Przedmiotem modelowania i symulacji jest oryginalny młot udarowy sprężynowy o nazwie RG -1, zaprojektowany i wykonany w Katedrze Mechaniki i Informatyki Stosowanej Wydziału Mechanicznego Wojskowej Akademii Technicznej w Warszawie [1]. Opracowano nieliniowy dyskretny model dynamiczny układu młot-badany element energochłonny-wibroizolacja-fundament-podłoże i wyznaczono wartości parametrów tego modelu. Sformułowano nieliniowe równania ruchu układu w niejawnej postaci i opracowano algorytm numerycznego całkowania tych równań. Opracowano program komputerowy KESHA v2 do symulacji numerycznej drgań układu. Przeprowadzono wstępne badania numeryczne energochłonności elementów kompozytowych cylindrycznych. W celu redukcji drgań wywołanych pracą młota, urządzenie posadowiono na żelbetowym fundamencie blokowym za pośrednictwem wibroizolacji GERB, którą stanowi układ czterech wibroizolatorów sprężynowych z tłumikami wiskotycznymi, typu KV-452-247 03. Badany młot udarowy należy do klasy młotów o średnich prędkościach uderzenia i średniej energii uderzenia (v_u = 2,5-11 m/s; E_u = 0,1-6,0 kJ).
The study presents modelling and numerical simulation of the RG -1 spring stroke hammer, using the multi-body dynamics approach. The device has been designed and erected at the Laboratory of Strength of Materials of the Department of Mechanics and Applied Computer Science of Military University of Technology, Poland. The study develops a nonlinear discrete dynamic model of the hammer-examined specimen-vibroisolation-foundation-subsoil system as well as determines the values of the system parameters. A nonlinear matrix equation of motion of the system has been formulated partly in the implicit form, taking into consideration subsequent/simultaneous stages of the dynamic process, i.e., rapid release of the ram catch, expansion of the mainsprings, impact of the ram onto the examined specimen, shock absorption by the elastomeric pads, reduction of the forced vibrations by GERB vibroisolators, propagation of the vibrations in the subsoil, free damped vibrations of the system. An implicit algorithm for numerical integration of equations of motion, based on Newmark's average acceleration method, has been formulated. The problem has been reflected by a computer programme written in Pascal. The study presents numerical simulations reflecting dynamic tests of energy-absorbing composite cylindrical specimens. The ram fixed to the moving traverse is able to induce progressive failure up to the specimen length minus 15 mm. A distance of 15 mm is reserved for gathering the material of the destroyed part of the specimen. If this distance is achieved, the moving traverse strikes onto the elastomeric pads fixed to the cantilevers. All possible breakings away are taken into consideration in the matrix equation of motion. In order to reduce vibrations, induced by rapid releasing of the ram catch and by the main impact, the device has been connected to RC block foundation with four viscoelastic KV-452-247 03 GERB vibroisolation units. The fundamental natural frequency of the system is close to f1 = 3.4 Hz. The exemplary time histories of vibrations of select subsystems, corresponding to the initial shortening of the mainsprings equal to s = 75 mm and 150 mm, number of bobs n = 0, and the carbon/epoxy specimen CE-1, are shown in Figs. 10 and 11. The multi-body dynamic model of the device, the dynamic equation of motion, the computer algorithms and the computer programme constitute an effective tool for predicting energy absorption of composite specimens and for assessment of vibration isolation effectiveness. The GERB vibroisolation has appeared to be very effective. The investigated device belongs to the hammers class of the medium impact velocities (v_u = 2.5-11 m/s) and the medium impact energy (E_u = 0.1-6.0 kJ).
Źródło:: Biuletyn Wojskowej Akademii Technicznej; 2010, 59, 4; 313-334
1234-5865
Pojawia się w:: Biuletyn Wojskowej Akademii Technicznej
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:: Modelling and numerical simulation of the protectiye shield - protected plate - test stand system under blast shock wave
Autorzy:: Klasztorny, M.
Dziewulski, P.
Niezgoda, T.
Morka, A.
Powiązania:: https://bibliotekanauki.pl/articles/242616.pdf
Data publikacji:: 2010
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: light armoured vehicle
protective shield
aluminium-hybrid laminate-foam shield
blast shock wave
modelling and simulation
Opis:: The study presents FE modelling and simulation of a system for range testing of protective shields for light armoured vehicles. The protective shield designed by Authors is used against HE mines and IEDs up to 10 kg TNT. The system consists of the multiple-use portable rangę stand, a protected Armox 500T steel plate and a protective shield. The shield has a multi-layer structure and has the following main layers: PA11 aluminum, SCACS hybrid laminate, ALPORAS aluminum foam, SCACS hybrid laminate, connected together using SOUDASEAL chemo-set glue. The HE spherical charge is suspended centrally at 400 mm distance from the top surface of the stand. Overall dimensions of the test stand are approximately 800x800x180 mm, the protected piąte has dimensions 650x650x5 mm, and the protective shield is of 450x450x76 mm dimensions. The system is supported by an additional steel plate stiffening the subsoil. FE modelling, numerical simulations and processing the results were performed for the system under blast shock wave using the following CAE systems: CATIA, HyperMesh, LS-Dyna, and LS-PrePost. The 8-nodes brick finite elements were used, taking into account friction and contact phenomena. Isotropic and orthotropic material models and advanced nonlinear equations-of-state for some parts of the system were chosen, with relevant failure and erosion criteria, including the Johnson — Cook model for Armox 500T steel and PA11 aluminum and the MAT 161 model for plies of hybrid laminates. The shock wave was modelled approximately using the LOAD BLAST ENHANCED option available in LS-Dyna Version 971 R4 Beta code. Numerical simulations were performed for 2 kg TNT.
Źródło:: Journal of KONES; 2010, 17, 3; 197-204
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 15.

Tytuł:: Modelling and numerical simulation of symmetric vibrations of the KNI 140070 viaduct -ballasted track - KTX train system
Autorzy:: Szurgott, P.
Klasztorny, M.
Niezgoda, T.
Powiązania:: https://bibliotekanauki.pl/articles/247456.pdf
Data publikacji:: 2010
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: railway bridge
composite bridge
ballasted track
KTX train
modelling and simulation
Opis:: The paper develops a new methodology of FE modelling and simulation of the bridge - track - moving train system with the use of CAE systems. The KNI 140070 viaduct of span length 14.40 m, located on the Polish Central Main Line, has been selected. The modernized track contains: 60E1 main rails equipped with Vossloh 300-1 fasteners, 60E1 side rails with SB3 fasteners, B 320 U60 sleepers, crushed stone ballast, approach RC slabs. A KTX (Korea Train eXpress) high-speed train, being a modification of a TGV train, is taken into consideration. A methodology of physical and numerical modelling of the viaduct, the track and the train was developed using Altair HyperMesh and LS-PrePost software. The FE model of a bridge superstructure consists of 4-node shell elements (main beams) and 8-node 48 DOF solid elements (reinforced concrete platform). RAIL TRACK and RAIL TRAIN modules available in LS-Dyna system were applied for simulating the train — trach interaction. Hughes-Liu beam elements were used for the rail modelling. Rail fastenings were simulated using one-dimensional discrete spring and damper elements. Carbodies, bogieframes and wheelsets were considered as rigid bodies and they were modelled using shell and beam elements. Cylindrical and revolute constrained joints and discrete springs and dampers were applied to connect all components of the FE model of rail-vehicles. The exemplary simulation of transient vibrations of the bridge - trach -train system has been made for service velocity 300 km/h. Contours of displacement and stress and selected time histories for displacements, accelerations and stresses, created in LS-PrePost and HyperView software, have been analysed.
Źródło:: Journal of KONES; 2010, 17, 3; 415-422
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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