Autor: Krasoń, W. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Field tests of the scissor-AVLB type bridge
Badania poligonowe mostu towarzyszącego typu nożycowego
Autorzy:: Krasoń, W.
Powiązania:: https://bibliotekanauki.pl/articles/327574.pdf
Data publikacji:: 2010
Wydawca:: Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:: most nożycowy AVLB
próba obciążeniowa
scissor-AVLB type bridges
load tests
Opis:: Scissor-AVLB type bridges are subject of studies presented in a paper. The bridge span is extended automatically by means of a mechanical bridge-laying gear carried together with bridge sections on a self-propelled chassis. The single-span scissors-type BLG (a manufacturer's designation) bridge length available is up to 20m and the load bearing capacity is of 500kN. In connection to the BLG bridge modernization (bridge deck widening), there arose the need to conduct basic engineering analyses in order to verify the structure's correctness. Some aspects of an experimental test of the single-span scissors-type BLG bridge operation were presented. Displacements and strains in particular sections of the structure were measured during field tests with different load modes. Results of load tests performed on a modernized BLG bridge structure made it possible to verify the correctness of the BLG numerical models.
Przedmiotem badań przedstawionych w pracy jest most nożycowy AVLB. Przęsło mostu nożycowego rozkładane jest automatycznie za pomocą układacza mechanicznego transportowanego razem ze złożonym przęsłem mostu na podwoziu gąsienicowym. Długość pojedynczego przęsła mostu nożycowego wynosi 20m, a nośność 500kN. W związku z modernizacją mostu BLG (poszerzenie pasa jezdni) powstała potrzeba przeprowadzenia podstawowych analiz inżynierskich w celu zweryfikowania poprawności konstrukcji. W pracy omówiono próby poligonowe pojedynczego przęsła mostu BLG. Podczas badań poligonowych zmierzono przemieszczenia i odkształcenia mostu poddanego działaniu różnych wariantów obciążeń. Wyniki prób obciążeniowych umożliwiły weryfikację poprawności modeli numerycznych mostu BLG.
Źródło:: Diagnostyka; 2010, 3(55); 13-16
1641-6414
2449-5220
Pojawia się w:: Diagnostyka
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 2.

Tytuł:: Numerical standard tests of railway carriage platform
Autorzy:: Chłus, K.
Krasoń, W.
Powiązania:: https://bibliotekanauki.pl/articles/246494.pdf
Data publikacji:: 2012
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: ACTS intermodal wagon
standard strength test of the structure
FEM
numerical analysis
Opis:: The object of the paper is to build a numerical model of a railway wagon and perform statics calculation. The examined railway wagon is designed to transport interchangeable containers in ACTS (Abroll Container Transport System). The essential matter of such reloading is placing the container on a special rotating platform, which enables horizontal reloading of the load on the truck. The carriage is equipped with a flat frame cooperating with two bogies and three mobile platforms rotated in respect to central knots in order to simplify the process of loading and unloading of the interchangeable containers. A numerical model was verified and validated by experimental and numerical tests. Particular attention was paid to the support model in a contact place of the frame-carriage and bogies. The paper presents the results of static calculations prepared in accordance with relevant standards for this type of construction. The numerical model was loaded according to the requirements of PN-EN12663 standard specified for the F-I vehicle and BN-77/3532-40 standard. The finite element method was used for numerical analysis. A discreet FEM model was developed with the aid of MSC Patran pre-processor, while MSC Nastran code was applied for simulations. The results of calculations are presented by displacement and stress characteristic. Strength of construction was determined based on results.
Źródło:: Journal of KONES; 2012, 19, 3; 59-64
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 3.

Tytuł:: Experimental verification of numerical test results for a double multi- leaf spring
Autorzy:: Krasoń, W.
Wysocki, J.
Powiązania:: https://bibliotekanauki.pl/articles/242087.pdf
Data publikacji:: 2009
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: experimental verification
FEM
numerical models
double multi-leaf spring
suspension of a motor truck
Opis:: A double spring used in the vehicle suspension, as a combination of spring elements of characteristics close to linear ones, actually provides non-linear suspension characteristics. Due to requirements for the truck suspension being designed, the spring characteristics in the whole range of load changes should meet the vehicle motion smoothness related to keeping the frequency of own suspension vibrations within a range of l-2 Hz [8, l0]. A prototype double spring made of a four-leaf main spring and two- leaf auxiliary spring (Fig. 1) makes a subject of considerations. Characteristic features of that structural solution includes a clearance between the main spring and the auxiliary spring. This work presents the results of numerical tests for three models of MES double spring [23] that were compared with experimental test results. An evaluation of usability of individual numerical models was made for representation of a double spring characteristics, contact between individual leaves and regular stress in the main leaf (the so-called safety leaf). The smallest differences between the stress results obtained from numerical tests compared to the laboratory tests, for the beam and shell models, have been obtained only for one extreme main (longest) leaf.
Źródło:: Journal of KONES; 2009, 16, 3; 185-193
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 4.

Tytuł:: Analysis of vibrations of the simplified model of the suspension system with a double spring and a fluid damper
Autorzy:: Krasoń, W.
Wysocki, J.
Powiązania:: https://bibliotekanauki.pl/articles/244562.pdf
Data publikacji:: 2011
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: FEM
numerical models
double multi-leaf spring
suspension of a motor truck
viscous damper
Opis:: The subject of the paper are forced vibrations of the rear suspension of the biaxial vehicle fitted with the double spring spatial shell model and the viscous damper, under the force pulse input with the given transient response. The play between the master and auxiliary spring is a specific feature of the double spring design [1, 6]. Numerical tests were taken for three variants of the viscous attenuation. The attenuation coefficient values for typical dependent suspensions and their range of changes were assumed on the basis of publication [14]. The problem of modelling and analysing, including contact issues, was solved with the use of the MSC Software programme package with the special use of MSC Patran pre-processor [12]. The numerical analysis of the suspension model with the geometrical nonlinearities, viscous attenuation, and time-varying load was taken with the use of the finite element method (FEM). The selected results of the model tests in the form of the suspension relative displacements (speeds) and deformations (stresses) for the selected points of the master and auxiliary spring against time are presented in the paper. The complete model of the suspension system makes possible to examine the influence of various inputs on the interoperation and the phenomena associated with the dynamic response of such a complex system.
Źródło:: Journal of KONES; 2011, 18, 1; 311-316
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 5.

Tytuł:: Strength testing of side connector of railway wagon for semitrailers transport
Autorzy:: Stankiewicz, M.
Krasoń, W.
Powiązania:: https://bibliotekanauki.pl/articles/245060.pdf
Data publikacji:: 2016
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: intermodal railway wagon
strength test
FE analysis of the side connector (lock)
Opis:: A prototype railway wagon with a rotatable platform for an intermodal system is developed in Military University of Technology. The special railway wagon is equipped with a rotatable low flat loading floor. It can be used for transporting various types of vehicles, for example, tractors, trucks, trailers, semitrailers, cargo containers. The special wagons allows quick and convenient self-loading and unloading of vehicles and containers (no cranes needed); no platform infrastructure is required, only hardened flat surface; there is no need for hubs, terminals or special logistics; each wagon can be operated separately. A considered wagon consists of the following elements: chassis with biaxial standard Y25 bogies, frame, platform body, pneumatic systems, buffer devices, other external devices, electric equipment and hydraulic systems. A mechanism blocking rotation of a rotatable platform during transport of the load (typical semitrailers) is very important from a functionality and strength point of view of the considered wagon. Construction of such a lock allows only transmission of longitudinal load. Based on the performed FE analysis and strength tests of the wagon, it was verified that the most strenuous component of the wagon with a rotatable loading platform is a connector (lock) coupling the side of the rotatable platform with the over bogie part of the frame wagon. The selected aspects of numerical and experimental studies of the prototype railway wagon and its components are presented in the paper. FE analyses of the side lock element separated from the wagon structure are discussed as well.
Źródło:: Journal of KONES; 2016, 23, 2; 349-356
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 6.

Tytuł:: Multibody rigid models and 3D FE models in numerical analysis of transport aircraft main landing gear
Autorzy:: Krason, W.
Malachowski, J.
Powiązania:: https://bibliotekanauki.pl/articles/200211.pdf
Data publikacji:: 2015
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: transport aircraft
main landing gear
numerical tests
rigid and 3D FE models
samolot transportowy
podwozie główne
metodologia testów numerycznych
Opis:: Dynamic analyses of a transport aircraft landing gear are conducted to determine the effort of such a complex system and provide capabilities to predict their behaviour under hazardous conditions. This kind of investigation with the use of numerical methods implementation is much easier and less expensive than stand tests. Various 3D models of the landing gear part are defined for the multistage static FE analysis. A complete system of the main landing gear was mapped as a deformable 3D numerical model for dynamic analysis with the use of LS-Dyna code. In this 3D deformable FE model, developed in a drop test simulation, the following matters were taken into consideration: contact problems between collaborating elements, the phenomena of energy absorption by a gas-liquid damper placed in the landing gear and the response of the landing gear during the touchdown of a flexible wheel with the ground. The results of numerical analyses for the selected drop tests and the results from the experiments carried out on a real landing gear were used for verification of FE models and a methodology of the landing gear dynamics analysis. The results obtained from the various simulations of the touchdown have proved the effectiveness of the 3D numerical model and how many problems can be solved in the course of only one numerical run, e.g. geometric and material nonlinearities, a question of contact between the mating components, investigation of the landing gear kinematics, investigation of the energy dissipation problem in the whole system and the stresses influence on the structure behaviour, which can appear in some elements due to overload.
Źródło:: Bulletin of the Polish Academy of Sciences. Technical Sciences; 2015, 63, 3; 745-757
0239-7528
Pojawia się w:: Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 7.

Tytuł:: Numerical testing of landing gear system for different drop velocities
Autorzy:: Krasoń, W.
Małachowski, J.
Powiązania:: https://bibliotekanauki.pl/articles/245668.pdf
Data publikacji:: 2009
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: landing gear
numerical simulation
drop velocities
touchdown
Opis:: The FEM model of the landing gear was developed to determine efforts of individual structural members while simulating the landing-gear drop, and to investigate how the energy of such a system changes; also, to find what kinds of deformations occur in individual components, and to investigate into the effectiveness of the damping system. In the developed numerical model of the landing gear account was taken also of the support-wheel-related subassembly, which includes such elements as: the wheel pin, the wheel rim, and the tyre. All parts of this subassembly, belt in the tyre excluded, were represented with the flexible hexagonal elements. results of numerical analyses for some selected drop tests and results from experiments carried out on a real landing gear confirm high quality of results gained from the dynamic simulation in the model of a complete landing-gear configuration. The advantage of the presented numerical method is applicability there of to landing gear testing for the very wide range of drop velocities, what is impossible to be performed with other methods, including experimental testing work. Paper show the geometric model of the main landing gear, a discrete model with the shock-absorber model included, the fringe of the landing gear deformation at the flnal stage of touchdown phase respectively from experimental and numerical tests and the maps ofmaximum principal stresses and how they change within the area of the welded joint that connects the upper and lower levers of the main landing gear.
Źródło:: Journal of KONES; 2009, 16, 4; 241-246
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 8.

Tytuł:: A numerical analysis of a double multi-leaf spring model
Autorzy:: Wysocki, J.
Krasoń, W.
Powiązania:: https://bibliotekanauki.pl/articles/245995.pdf
Data publikacji:: 2009
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: FEM
numerical models
double multi-leaf spring
suspension of a motor truck
Opis:: The use of a double spring in a vehicle suspension as a combination of elastic components of characteristics which are approximate to linear ones gives a nonlinear suspension nature, which should approximately meet the criterion of car motion smoothness connected with keeping the frequency of the free vibrations of the a motorcar body in the range of l - 2 Hz, in the whole range of load changes (cargo) [see references 8, 10]. The subject of considerations is a prototypical double spring that consists of a four-leaf main spring and a two-leaf auxiliary spring and is meant for the family of motor trucks (delivery trucks) of a total mass of about 3,51. The presence of a clearance between the main spring and the auxiliary spring is the specificity of the aforementioned structural solution. In the present study, there are presented different variants of FEM numericał models ofa double spring as well as selected aspects of their applications at the stage of the research on the displacements and deformations of selected structural components. The structures ofa two-dimensional beam model, a three-dimensional shell model and a solid model of a double spring are discussed. Moreover, the study discusses different approaches in the modelling of the effect of contact between particular leaves and their influence on analysis results. Selected model tests results were compared with experimental research results.
Źródło:: Journal of KONES; 2009, 16, 1; 541-550
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 9.

Tytuł:: The research on the double spring effort in braking process
Autorzy:: Krasoń, W.
Wysocki, J.
Powiązania:: https://bibliotekanauki.pl/articles/247773.pdf
Data publikacji:: 2010
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: FEM
numerical models
double multi-leaf spring
truck suspension
load in braking process
Opis:: A prototype double spring, consisting of the main four-leaf spring and the auxiliary two-leaf spring, designed for a truck (van) vehicles of a gross weight ofapp. 3,5 tons, makes the subject of considerations. This structural design is characterized by a clearance between the main and the auxiliary springs. The main objective of this work is to define the double spring strain during intense vehicle braking. A spatial FE shell double spring model has been proposed and it has been used for effort and deformation research on its selected elements, at combined load (vertical, horizontal forces and braking moment). Numerical tests have been performed within the quasistatic operation loads. The numerical analysis using those loads allows evaluating the braking force impact on the double spring operation and cooperation of the main and auxiliary spring leaves. Modelling and analysis issue, including contact issue, have been sohed by means of the software package for engineering computation by MSC. Software. Results obtained from simulations allow evaluating the deformation of individual leaves of the double spring, stress concentration areas and preliminary identification of the suspension (drive axle) kinematics, particularly to define axis trajectory of the wheel. Selected numerical test results have been compared to the experimental test results.
Źródło:: Journal of KONES; 2010, 17, 4; 237-244
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 10.

Tytuł:: Dynamic analysis of railway platform chassis model
Autorzy:: Chłus, K.
Krasoń, W.
Powiązania:: https://bibliotekanauki.pl/articles/242171.pdf
Data publikacji:: 2011
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: mechanics
strength of construction
FEM
dynamic analysis
railroad wagon
Opis:: The aim of the paper is to build a numerical model of a railway wagon, to perform statics calculation as well as to compare the calculations results with the experimental results of measurement of a real railway wagon maximal deflection and to conduct dynamic analyses. The examined railway wagon was designed to transport interchangeable containers in ACTS (Abroll Container Transport System). The essential matter of such reloading is placing the container on a special rotating platform which enables horizontal reloading of the load onto the truck. In order to perform strength and dynamic numerical analyses with a finite element method (FEM), a 3D coat-beam model of the wagon were prepared. The discreet FEM model was executed with the aid of MSC.Patran preprocesor and for calculations MSC Nastran program was applied. The obtained results were verified by the experimental results of measurement of real railway wagon maximal deflection. The correctly verified model was applied both for modal analysis of free vibration and time dependent dynamic analysis. The influence of dynamic load on construction strength was examined. The loading model was selected so as to represent hypothetical simultaneous loading of the containers on the carriage frame. It turned out that the most strenuous element during the simulation of loading the containers onto the frame was the element of the vertical reinforcing plate which is in the direct contact with the pivot support of the carriage.
Źródło:: Journal of KONES; 2011, 18, 2; 93-100
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 11.

Tytuł:: Numerical studies of suspension system with double spring loaded using the force pulse
Autorzy:: Krason, W.
Wysocki, J.
Powiązania:: https://bibliotekanauki.pl/articles/244918.pdf
Data publikacji:: 2018
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: dependent motor truck suspension
double multi-leaf spring
viscous damper
numerical analysis
FEM
zależne zawieszenie samochodu silnikowego
podwójna sprężyna wielopłatowa
lepka przepustnica
analiza numeryczna
MES
Opis:: The forced vibration of a dependent rear suspension model of the two-axle vehicle, equipped with a 3D model of a double spring and a viscous shock absorber is the subject of consideration. The clearance between the master and auxiliary springs is a specificity of the double suspension construction. Dynamic analysis of such a system has been performed by forcing with different forms of force pulses using the fixed base of force 10 kN. Three different time runs (two trapezoidal and one triangular model) are used as the force impulses. Modelling and analysis taking into consideration contact problems have been developed using the MSC.Software package with a special use of Patran pre-processor and Nastran solver. A finite element method (FEM) has been used in numerical analysis of the suspension model with geometric nonlinearities, viscous damping [9] and time-varying load. The boundary conditions of numerical models correspond to a spring support in the real vehicle suspension. The non-periodic damped vibrations and damped free vibrations of the simplified suspension system are investigated during numerical analysis. Selected results of the model tests have been presented in the form of the timings of the accelerations of the spring elements and of the forces in the suspension damper.
Źródło:: Journal of KONES; 2018, 25, 1; 241-248
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 12.

Tytuł:: Field test and numerical studies of the scissors-AVLB type bridge
Autorzy:: Krason, W.
Malachowski, J.
Powiązania:: https://bibliotekanauki.pl/articles/201143.pdf
Data publikacji:: 2014
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: scissor-AVLB type bridge
experimental test
numerical FE analysis
Opis:: Scissor bridges are characterized by high mobility and modular structure. A single module-span consists of two spanning parts of the bridge; two main trucks and the support structure. Pin joints are used between modules of the single bridge span. Some aspects of the experimental test and numerical analysis of the scissor-AVLB type bridge operation are presented in this paper. Numerical analyses, presented here, were carried out for the scissors-type BLG bridge with treadways extended as compared to the classical bridge operated up to the present in the Armed Forces of the Republic of Poland. A structural modification of this kind considerably affects any changes in the effort of the force transmitting structure of the bridge. These changes may prove to be disadvantageous to the whole structure because of torsional moments that additionally load the treadways. Giving careful consideration to such operational instances has been highly appreciated because of the possibility of using this kind of bridges while organizing the crossing for vehicles featured with various wheel/track spaces (different from those used previously). The BLG bridge was numerically analysed to assess displacements and distributions of stresses throughout the bridge structure in different loading modes. Because of the complexity of the structure in question and simplifications assumed at the stage of constructing geometric and discrete models, the deformable 3D model of the scissors-type bridge needs verification. Verification of the reliability of models was performed by comparing deflections obtained in the different load modes that corresponded with tests performed on the test stand. It has been shown that the examined changes in conditions of loading the treadways of the bridge are of the greatest effect to the effort of the area of the joint which is attached to the girder bottom. Stress concentrations determined in the analysis are not hazardous to safe operation of the structure.
Źródło:: Bulletin of the Polish Academy of Sciences. Technical Sciences; 2014, 62, 1; 103-112
0239-7528
Pojawia się w:: Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 13.

Tytuł:: FE numerical tests of railway wagon for intermodal transport according to PN-EU standards
Autorzy:: Krason, W.
Niezgoda, T.
Powiązania:: https://bibliotekanauki.pl/articles/202087.pdf
Data publikacji:: 2014
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: prototype railway wagon for intermodal transport
FE methodology of numerical tests
analysis of the wagon strength and dynamics simulations according to PN-EU standards
prototyp wagonu kolejowego transportu intermodalnego
FE
metodologia testów numerycznych
analiza wytrzymałości wagonu
symulacja dynamiki wagonu
normy PN-EN
Opis:: A special wagon, presented in the paper, can be used for intermodal transport of various types of vehicles. It enables transport of vehicles of 36 tons mass and height of 4m on the GB1 clearance height. An innovative wagon is equipped with a frame-support with marginal parts mounted on standard biaxial bogies and the central part lowered with a rotatable loading platform. The rotating part of wagon acts as a kind of platform, allowing truck to move through it during load/unload. During railway operation, this rotating platform is to become an integrated part of the wagon; the tailboards of the rotating part will be connected to the over-bogie part with the special locks. A unique concept of the wagon structure forced a design approach which was rather unusual for the rail industry. Since the design team aimed at very challenging demands of GB1 envelope and usage of standard bogies, the layout of the wagon had to be thoroughly examined in terms of its overall stiffness. Every major design change had to be simulated in order to accurately predict its influence on the whole wagon structure. FE analysis was used for numerical tests of such a wagon structure in different configurations. The calculations were carried out on the basis of PN-EN standards. Selected results of numerical tests of the prototype version of a such wagon for intermodal transports were presented in the paper.
Źródło:: Bulletin of the Polish Academy of Sciences. Technical Sciences; 2014, 62, 4; 843-851
0239-7528
Pojawia się w:: Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 14.

Tytuł:: Numerical investigation of a landing gear system with PIN joints operating clearance
Autorzy:: Krasoń, W.
Małachowski, J.
Sołtysiuk, J.
Powiązania:: https://bibliotekanauki.pl/articles/246952.pdf
Data publikacji:: 2010
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: landing gear
joints operating clearance
finite element method (FEM)
numerical simulation
Opis:: In this paper, FE method is applied to determine an operating clearance influence on the dynamics of a military transport aircraft landing gear. The numerical analysis results presentation of two-dimensional landing gear model drop tests using MSC Working Model code is also shown. Numerical results agree well with respective experimental investigation ones. The analyses using two-dimensional rigid model were performed to correlate a numerical characteristic of a shock absorber substitute model with real shock absorber characteristic. A fully deformable spatial discrete FEM model of the landing gear was developed for precise analyses aimed at determining a joint clearance influence on a considered mechanical system dynamics. Calculations were performed using the so-called direct-integration procedure, colloquially called 'the explicit integration'. Additionally at this stage, the Rayleigh damping model has been included. The non-linear dynamic analyses were performed using the LS-DYNA code. The final part presents the comparison of drop tests numerical solution results of a landing gear with assembly clearance and with operating clearance. The advantage of developed numerical method is the possibility to determine energy changing, particular components deformations, joint contact forces, what is nearly impossible to record performing experimental investigation. The presented method is applicable for a variety of boundary condition i.e. drop velocities, aircraft effective mass, etc.
Źródło:: Journal of KONES; 2010, 17, 2; 241-248
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 15.

Tytuł:: Simulations of motion of prototype railway wagon with rotatable loading floor carried out in MSC Adams software
Autorzy:: Niezgoda, T.
Krasoń, W.
Stankiewicz, M.
Powiązania:: https://bibliotekanauki.pl/articles/242161.pdf
Data publikacji:: 2012
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: intermodal transport
railway wagon
simulation of motion
MSC ADAMS
Opis:: The railway wagon with a low flat rotatable loading floor was analysed in the paper. Such a structure can be used for transporting various types of vehicles such as tractors, trucks, trailers, semitrailers, cargo containers. The railway wagon allows quick and fast loading and unloading without any platform infrastructure or terminals. Only a hardened flat surface is required. Each railway wagon can be loaded-unloaded individually (no cranes needed). This construction has a wide range of application and is easy to operate. The model of a railway wagon consisted of standard carriages, undercarriages, and a rotatable loading floor was developed. The model was built of rigid solids. Between individual elements of the model, the appropriate joints and contact connections were created. The model was analysed using MSC Adams code, which allows performance of the 3D kinematic - dynamic analyses of the entire model. The analyses were carried out with use of the model of the loaded semitrailer. Passage of the railway wagon with a trailer on horizontal rails, which are the smallest standard arc with a radius 250m, was simulated at different speed. Reactions occurring in couplings of the rotatable loading floor, which are the main element of connection between the rotatable loading floor and motionless undercarriages part of the frame of the wagon, were tested. The maximum velocity at which the railway wagon can move was analysed as well. There was also examined the speed at which the wheels separate from the rails, what results in derailment of the whole wagon.
Źródło:: Journal of KONES; 2012, 19, 4; 495-502
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Informacja

Wyszukujesz frazę "Krasoń, W." wg kryterium: Autor

Źródło danych

Dostawca treści

Kolekcja

Rok wydania

Wydawca

Temat

Autor

Typ dokumentu

Język