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Tytuł:
Thermovision in the validation process of numerical simulation of braking
Autorzy:
Baranowski, P.
Damaziak, K.
Malachowski, J.
Mazurkiewicz, L.
Polakowski, H.
Piatkowski, T.
Kastek, M.
Powiązania:
https://bibliotekanauki.pl/articles/220945.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
thermovision
numerical models validation
temperature measurement
Opis:
This article presents the validation process of a brake FE model by means of temperature measured on a special stand using infrared technology. Unlike many other publications, the authors try to show the interaction between measurement technology and numerical modeling rather than only nice, perfectly correlated graphs. Some difficulties in choosing and using validation parameters are also pointed out and discussed. Finally, results of FE analyses are compared with measured data, followed by explanation of applied numerical technology and estimation of validation process effectiveness.
Źródło:
Metrology and Measurement Systems; 2014, 21, 2; 329-340
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Submodel of bypass flow in cracking soils. Part 2. - Experimental validation
Autorzy:
Walczak, R.T.
Sobczuk, H.
Slawinski, C.
Powiązania:
https://bibliotekanauki.pl/articles/24990.pdf
Data publikacji:
1996
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
bypass flow
flow mechanism
validation
soil crack
experimental validation
moisture content
numerical validation
water content
Źródło:
International Agrophysics; 1996, 10, 3
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental validation of the numerical model of a car impact on a road barrier
Autorzy:
Barnat, W.
Bogusz, P.
Dziewulski, P.
Gieleta, R.
Kiczko, A.
Klasztorny, A.
Klasztorny, M.
Niezgoda, T.
Ochelski, S.
Powiązania:
https://bibliotekanauki.pl/articles/245936.pdf
Data publikacji:
2010
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
car - road barrier system
crash test
experimental examinations
numerical simulations
numerical model validation
Opis:
This analysis considers the problem related to the transport safety improvement by applying specialized energy absorbing elements. The advanced finite element method was used to solve this problem. The obtained results permit to estimate the practical usability of the proposed solution. In previous works of the examination team [1-5] a series of numerical analysis of the car -- road barrier dynamical system, directed to the elaboration of the numerical model methodology of an impact problem with the use of chosen CAE programs, was submitted. In this article experimental results of a Suzuki Swift car impact into a standard road barrier arę presented. Tests were carried out at the Automotive Industry Institute (PIMOT) in Warsaw, with the use of a test sample of the road barrier. Presented results of experimental tests serve to validation of a numerical model of the aforementioned system. For the safety sake the car's speed during the experimental examinations was limited to 50 km/h. Moreover, the vehicle hit perpendicularly a properly modified road barrier's sector. Experimental initial boundary and constructional conditions were modelled in numerical examinations. in which a commonlv available Suzuki Swift car model, http://www.ncac.gwu.edu, was used. Numerical analysis was carried out with the use of LS-DYNA system.
Źródło:
Journal of KONES; 2010, 17, 1; 17-27
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modelling and numerical simulations of a TB51 road crash test using a simplified coach model
Modelowanie i symulacje numeryczne drogowego testu zderzeniowego TB51 z zastosowaniem uproszczonego modelu autobusu
Autorzy:
Dziewulski, P.
Powiązania:
https://bibliotekanauki.pl/articles/1363753.pdf
Data publikacji:
2016
Wydawca:
Sieć Badawcza Łukasiewicz. Przemysłowy Instytut Motoryzacji
Tematy:
bridge protective barrier
TB51 crash test
methodology of numerical modelling
numerical validation
experimental validation
mostowa bariera ochronna
test zderzeniowy TB51
metodologia modelowania numerycznego
walidacja numeryczna
walidacja eksperymentalna
Opis:
The paper proposes a methodology of a TB51 virtual crash test on the example of the selected bridge protective barrier, using a simplified coach model. In simulations of crash tests, the nonlinear, explicit finite element code LS-Dyna v971 was used. The simulation results corresponding to the simplified model were compared with the simulation results for a quasi-accurate model and the experimental crash test results. It was shown that the simplified vehicle model can be used in tests certifying a barrier modified in relation to the certified reference barrier.
W pracy zaproponowano metodologię wirtualnego badania zderzeniowego TB51 wg normy PN-EN 1317 na przykładzie wybranej mostowej bariery ochronnej, z zastosowaniem uproszczonego modelu autobusu. Celowo zrezygnowano z wpływu zawieszenia, tarcia kół o nawierzchnię, obrotu wokół poziomych osi centralnych pojazdu oraz maksymalnie uproszczono strefy zgniotu. Celem jest skrócenie symulacji i umożliwienie szybkiej kalibracji modelu pojazdu. Takie podejście pomoże również jednostkom certyfikującym w ocenie wyników ze względu na uproszczenie i ujednolicenie pojazdów używanych w symulacjach uderzenia w barierę. Wyniki symulacji odpowiadające modelowi uproszczonemu porównano z wynikami symulacji dla modelu quasi-dokładnego oraz z wynikami eksperymentalnego testu zderzeniowego. Wykazano, że uproszczony model pojazdu może być zastosowany do badań certyfikujących bariery zmodyfikowanej w stosunku do bariery referencyjnej mającej certyfikat. Do symulacji testów zderzeniowych zastosowano nieliniowy jawny kod Metody Elementów Skończonych LS-Dyna v971.
Źródło:
Archiwum Motoryzacji; 2016, 72, 2; 29-42
1234-754X
2084-476X
Pojawia się w:
Archiwum Motoryzacji
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Three-dimensional air velocity distributions in the vicinity of a mine heading’s sidewall
Trójwymiarowe rozkłady wektora prędkości powietrza w strefie przyociosowej wyrobiska górniczego
Autorzy:
Skotniczny, P.
Ostrogórski, P.
Powiązania:
https://bibliotekanauki.pl/articles/218826.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
sonda termoanemometryczna trójwłóknowa
pomiar profilu prędkości w wyrobisku górniczym
walidacja rozwiązania numerycznego
3-axis thermoanemometric probe
velocity profile measurement in mine heading
numerical solution validation
Opis:
The presented paper describes the results of an experiment determining the instantaneous values of velocity vector components of the air stream at selected spots of the boundary layer formed at the sidewalls of the mine heading in the ŁP type steel arch support. The experiment was carried out in a mine heading in an active hard coal mine. A 3-axis thermoanemometric probe was used to obtain three-dimensional distributions of the velocity and turbulent values, such as turbulence intensity and turbulent kinetic energy of the flowing ventilation air stream. The analysis of the measurement results was aided by a numerical solution of the discussed case of flow. The research results presented in this paper provide a basis for extensive studies of the description of velocity distribution and other turbulent quantities within the near-sidewall structures of a mine heading. The objective of these tasks is to improve the accuracy and reliability of numerical calculations relating to air flow in mine headings.
W artykule opisano wyniki eksperymentu polegającego na wyznaczeniu chwilowych wartości składowych wektora prędkości strugi powietrza w wybranych punktach warstwy przyściennej tworzącej się przy ociosach wyrobiska górniczego prowadzonego w obudowie typu ŁP. Eksperyment przeprowadzono w wyrobisku górniczym w czynnej kopalni węgla kamiennego. Przy pomocy trójwłókowej sondy termoanemometrycznej uzyskano trójwymiarowe rozkłady prędkości oraz rozkłady wielkości turbulentnych takich jak intensywność turbulencji i energia kinetyczna turbulencji przepływającej strugi powietrza wentylacyjnego. Analiza wyników pomiarów została wzbogacona rozwiązaniem numerycznym omawianego przypadku przepływowego. Przedstawione w artykule wyniki badań stanowią podstawę rozbudowanych studiów nad opisem rozkładu prędkości oraz pozostałych wielkości turbulentnych w obrębie struktur przyociosowych wyrobiska górniczego. Celem podjętych prac jest poprawa dokładności i rzetelności obliczeń numerycznych przepływu powietrza w wyrobiskach górniczych.
Źródło:
Archives of Mining Sciences; 2018, 63, 2; 335-352
0860-7001
Pojawia się w:
Archives of Mining Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Environmental influences on propagation of explosive wave on the dynamic response of plate
Autorzy:
Barnat, W.
Powiązania:
https://bibliotekanauki.pl/articles/199820.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
improvised explosive device
numerical model
validation
Opis:
The purpose of this article is to present the influence of the environment on the propagation of a shock wave and the dynamic response of the plate load by a shock wave. In the course of research in this field an experimental study was performed. An experimental study concerns the test plate loaded by a shock wave, formed after the detonation of an explosive device with equivalent weighing of TNT equal to 1 kg. During numerical investigations environmental impacts have been tested on the dynamic response disc. The considered environments of explosions were air water and soil. A model of the phenomenon has been prepared using commercial software MSC DYTRAN.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2014, 62, 3; 423-429
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental investigation of selected explosion parameters for numerical model
Autorzy:
Barnat, W.
Gieleta, R.
Niezgoda, T.
Powiązania:
https://bibliotekanauki.pl/articles/241757.pdf
Data publikacji:
2012
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
IED
improvised explosive device
numerical model
validation
Opis:
The aim of presented work is examination of blast wave, especially incident and reflected wave pressure. Due to many difficulties and complexity of phenomenon a complete study for different charges should be done. In presented paper two cylindrical TNT charges were used, weighting respectively 100 g and 200 g. Pressure wave was examined using original test stand designed and developed on Department of Mechanics and Applied Computer Science. A test steel test plate with 5 mm thickness was equipped with pressure gauge to measure reflected wave. Additionally, the plate was placed on four special electroresistance strain gauges...To measure force Vishay EA-06-120-060LZ strain gauges were used. For amplification of the dynamometers with strain gauges, MS1001 INFEL bridge was used. The system was used to validate the results from reflected wave pressure gauge. Shock wave pressures was measured using a special sensor model 137A21 amd M350B21 made by PCB Piezotronics At specific distance there was also incident wave pressure gauge. In order to fully examine the dynamic response of the plate an accelerometer was used. As a result, pressure versus time and acceleration versus time plots were obtained. The results will be used to validate numerical model of blast wave impact on a plate.
Źródło:
Journal of KONES; 2012, 19, 4; 9-13
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Validation of Numerical Simulations of Cavitating Flow in Convergent-Divergent Nozzle
Autorzy:
Niedźwiedzka, A.
Lipiński, S.
Powiązania:
https://bibliotekanauki.pl/articles/114485.pdf
Data publikacji:
2016
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
cavitating flow
numerical simulations
homogenous models
optoelectronic validation
Opis:
In the article, validation of results of numerical simulations of cavitating flow in a convergent-divergent nozzle is presented. In validation, a new optoelectronic system is used in order to extract the changes in the bubbles volume fraction of the mixture in freely specified cross-sections. Three homogeneous models (Schnerr and Sauer, Singhal et al. and Zwart et al.) are analysed. The assessment of usefulness of the new system in experimental measurements of cavitation is the main aim of the article. Looking for new opportunities to replace image analysis, which is a traditional validation method in numerical simulations of cavitating flows, is motivation for the research. The results obtained with the use of the system show a good agreement with the simulation’s results for the two chosen cross-sections. The described optoelectronic system gives promising results and can be regarded as an alternative to traditional validation methods in the cavitation research area.
Źródło:
Measurement Automation Monitoring; 2016, 62, 10; 329-332
2450-2855
Pojawia się w:
Measurement Automation Monitoring
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Validation of the FEM model of the Mi-24 tail boom and vertical stabilizer
Autorzy:
Reymer, P.
Powiązania:
https://bibliotekanauki.pl/articles/242236.pdf
Data publikacji:
2011
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
finite element method
Mi-24 helicopter numerical model
validation
Opis:
The scope of this work was the validation process of the numerical model of the Mi-24 helicopter tail boom and vertical stabilizer. In order to obtain a detailed geometry of the actual structure the sophisticated reversed engineering techniques were used. The measurement was performed using two separate techniques: one based on digitalphotogrammetry and other based on a three dimensional laser scanning with ATOSIII scanner. The numerical model was created with use of the obtained geometry, available technical documentation and detailed inspection of the structure. The obtained FEM model was validated using strain measurements of the real structure during characteristic flight maneuvers. A system of foil strain gauges was installed on the tail boom in previously selected locations. Calibration process, using known loads, was performed in order to determine response of the measurement system. To enable a quick and reasonable comparison of results from the experiment and calculations a special element was introduced in the FEM model. Their task was to monitor local strains in places corresponding to those where the strain gauges were installed. Detailed analysis of results confirmed, that after some minor modifications, the developed finite element model represents the actual structure reasonably well. Particular attention was paid to the representation of the boundary conditions and how to implement loads, which can significantly affect the obtained results. The analysis carried through confirms, that the presented validation technique, based on strain measurements, allows verifying a complicated numerical model in a relative cheap, fast and reliable way.
Źródło:
Journal of KONES; 2011, 18, 2; 369-376
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of road barriers on their abilities to absorb energy of hitting
Autorzy:
Niezgoda, T.
Kiczko, A.
Barnat, W.
Dziewulski, P.
Powiązania:
https://bibliotekanauki.pl/articles/244885.pdf
Data publikacji:
2008
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
numerical simulations
validation
road transport
road barriers
passive safety
Opis:
In the article, the results of tests and numerical computations of road infrastructure elements-protective barriers are presented. On the base of carried out tests (in laboratory conditions) the forms of deformations of each of elements and their assemblies, components of road protective barriers, were described. The determination of stiffness of each type of barriers, at the moment of their destruction, enabled to elaborate the methodology of the construction of numerical models and numerical simulations of the process of the barrier destruction. The absorption of energy of three subassemblies of road barriers, consisting of the W-beam guard rail section of 0.7 m, a post and SP01, SP05 and SP09 mounting hardware, was experimentally determined. From the comparison, the experimental results with the numerical simulation ones it is seen that proposed numerical models with a good accuracy present the behaviour of the real elements of barriers. Investigations enabled to estimate the distribution of absorbed energy of each constructional elements of barriers at the moment of their destruction. Further step in the investigation is to be an attempt to modify the construction, paying special attention to increasing its ability to absorb energy of collision. On this base, the protective road barrier system can be enriched with elements absorbing energy. Great energy absorbing abilities have elements which are subjected to progressive destruction e.g. by plastic deformation or delamination of elements produced from relatively cheap fiberglass reinforced plastic composites. The elaborated methodology of numerical simulation with the use of LS-DYNA software enables the essential shortening of the test period of worked out solutions.
Źródło:
Journal of KONES; 2008, 15, 4; 383-391
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Validation process for computational model of full-scale segment for design of composite footbridge
Autorzy:
Ferenc, Tomasz
Mikulski, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/259754.pdf
Data publikacji:
2020
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
validation
numerical modelling
sandwich structure
polymer composites
GFRP laminates
Opis:
Experimental tests and numerical simulations of a full-scale segment of a foot and cycle bridge made of polimer composites are presented in the paper. The analysed structure is made of sandwich panels, which consist of glass fibre reinforced polymer (GFRP) multi-layered laminate faces and a PET foam (obtained from recycling) core. The dimensions of the segment cross-section are the same as for the target footbridge; however, span length was reduced to 3 m. The experimental tests were conducted in a laboratory of the Faculty of Ocean Engineering and Ship Technology at Gdansk University of Technology. A single vertical force was generated by a hydraulic cylinder and was applied to the platform of the structure. The experimental tests were supported by numerical analyses performed in Femap with NX Nastran software by means of the finite element method (FEM). Results obtained in the computational model were compared with results from experiments. Thus, the numerical model was validated and the obtained conclusions were used in the next step of the design process of a composite footbridge with a span length of 14.5 m.
Źródło:
Polish Maritime Research; 2020, 2; 158-167
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental and numerical investigation of energy absorption elastomer panel with honeycomb structure
Autorzy:
Bogusz, P.
Popławski, A.
Morka, A.
Stankiewicz, M.
Sławiński, G.
Powiązania:
https://bibliotekanauki.pl/articles/246847.pdf
Data publikacji:
2015
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
energy absorption structure
blast shock wave
numerical modelling
elastomer
validation
Opis:
The paper presents a prototype design of elastomer energy absorbing panel made in a shape of honeycomb structure. The proposed panel was installed in a protected plate and tested on a specially designed test stand, where a shock wave from a small explosive charge was applied. The elastomer honeycomb structure was compared with a version of the panel made of solid elastomer materials, the same as used in the honeycomb structure and also with a protected plate without any panels. During the research, acceleration in the middle part of each investigated protected plate was recorded. The protected plates were scanned after the tests in order to measure their maximum deformation. Acceleration graphs and maximum deflections of all three considered structures were compared. The obtained results were used to validate numerical models of the designed structures and the test stand. A discreet model of the test stand and models of elastomer panels were developed with HyperMesh FEM software using shell and solid elements. The materials were described using a tabulated Johnson-Cook model and constitutive model for the rubber parts; all available in the material library of Ls-Dyna software. The blast loading was simulated using the CONWEP method. This model generates a boundary condition, based on the experimental data and TNT equivalent mass, which substitutes the wave propagation with a pressure. Finally, the experimental results of acceleration and deformation of the plates were compared with the corresponding results of the numerical analyses carried out using finite element method. The numerical models can be utilised in the future research as a virtual range stand. The developed elastomer honeycomb structure can be modified to meet various requirements of ballistic protection levels, by applying elastomer of different stiffness or optimizing shape and dimensions of the honeycomb structure.
Źródło:
Journal of KONES; 2015, 22, 4; 29-36
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Example of experimental validation and calibration of a finite element model of a heavy vehicle
Autorzy:
Szurgott, P.
Kwaśniewski, L.
Wekezer, J. W.
Powiązania:
https://bibliotekanauki.pl/articles/243839.pdf
Data publikacji:
2010
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
numerical simulations
finite element analysis
heavy vehicles
validation
suspension systems
Opis:
An example of the experimental validation ofafinite element model of a selected heavy vehicle is presented in the paper. A truck tractor with a three axle single drop lowboy trailer and the total weight of 20 tons was selected as a representative for the tests. The major goal of the conducted studies was to develop a well validated the numerical model of a heavy vehicle applicable for computer simulation of dynamic interaction between a vehicle and a bridge or road structure. Therefore, only several components of the vehicle, affecting the vehicle-road interaction, like wheels and the suspension systems, were modelled in detail. The rest of components were simplified and considered as rigid bodies. The finite element model included fully pneumatic tires and the suspension system modelled with discrete massless springs and dampers. Numerical analyzes were performed using the LS-DYNA computer code. The validation and calibration procedure proposed in the current paper was carried out in two steps. In the first one, some parameters such as material densities, thickness of selected elements, were modified to achieve the correct mass distribution in the model based on the measured axle loads. In the next step the stiffness and damping parameters of the suspension system were evaluated based on the results of the experimental tests. The spring and damping coefflcients at all axles were adjusted until the performance of the FE model closely matched that of the actual vehicle.
Źródło:
Journal of KONES; 2010, 17, 1; 433-440
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
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
Artykuł
Tytuł:
Rotation capacity of bolted flush end-plate stiffened beam-to-column connection
Zdolność do obrotu użebrowanego połączenia z blachą wpuszczoną belki ze słupem
Autorzy:
Ostrowski, K.
Kozłowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/396764.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
zdolność do obrotu
analiza MES
walidacja hierarchiczna
eksperyment numeryczny
rotation capacity
FEM analysis
hierarchical validation
numerical experiment
Opis:
One of the flexibility parameters of semi-rigid joints is rotation capacity. Plastic rotation capacity is especially important in plastic design of framed structures. Current design codes, including Eurocode 3, do not posses procedures enabling designers to obtain value of rotation capacity. In the paper the calculation procedure of the rotation capacity for stiffened bolted flush end-plate beam-to-column connections has been proposed. Theory of experiment design was applied with the use of Hartley’s PS/DS-P:Ha3 plan. The analysis was performed with the use of finite element method (ANSYS), based on the numerical experiment plan. The determination of maximal rotation angle was carried out with the use of regression analysis. The main variables analyzed in parametric study were: pitch of the bolt “w” (120-180 mm), the distance between the bolt axis and the beam upper edge cg1 (50-90 mm) and the thickness of the end-plate tp (10-20 mm). Power function was proposed to describe available rotation capacity of the joint. Influence of the particular components on the rotation capacity was also investigated. In the paper a general procedure for determination of rotation capacity was proposed.
Jednym z parametrów podatnościowych węzłów podatnych jest zdolność węzła do obrotu. Zdolność do obrotu jest szczególnie ważna w przypadku projektowania plastycznego konstrukcji szkieletowych. Normy projektowe, w tym Eurokod 3, nie zawierają procedur pozwalających obliczyć wartość obrotu węzła. W artykule przedstawiono procedurę obliczeniową prowadzącą do oszacowania zdolności do obrotu węzła doczołowego z blachą wpuszczoną. Wartości do wyznaczenia funkcji kąta obrotu uzyskano na podstawie analizy wykonanej metodą elementów skończonych, w oparciu o pięciowartościowy plan eksperymentu numerycznego Hartleya PS/DS-P:Ha3. Funkcję kąta obrotu wyznaczono z uwzględnieniem podstawowych zmiennych wpływających na obrót węzła, jakimi są: grubość blachy czołowej „tp”, poziomy rozstaw śrub „w” oraz odległość śruby od górnej półki „cg1”. Współczynniki funkcji maksymalnego kąta obrotu węzła wyznaczono metodą estymacji nieliniowej. Dokonano oceny wpływu oddziaływań poszczególnych elementów składowych węzła na graniczną wartość kąta obrotu węzła.
Źródło:
Civil and Environmental Engineering Reports; 2017, No. 25(2); 173-184
2080-5187
2450-8594
Pojawia się w:
Civil and Environmental Engineering Reports
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 20

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