Development of a Simulation Tool for the Dynamic Analysis of Railway Vehicle - Track Interaction

Abstract

Summary. The importance of modelling and simulation in the field of railway systems has greatly increased in the last decades. Various commercial simulation packages have been developed and are used to analyse the dynamic performance of railway systems. However, although sometimes the user needs to analyse various non-standard solutions, the possibility to integrate further modifications into the structure of such software is quite limited. Therefore, in some cases, in particular for specific modelling and analysis tasks, a feasible option is to develop flexible and robust simulation tools capable of using different configurations by modifying the models performing the dynamic analysis. The paper presents the mathematical modelling background and the conceptual design of a new of a new computational tool for the dynamic simulation of railway vehicle systems. The formulations employed in the proposed mathematical model are based on the multibody techniques. The developed model uses a combined frame of references that allows the use of independent coordinates without the possibility to have singularity configurations depending on the rotation sequence. The simulation tool is designed in a flexible form that enables the study of different configurations of the railway vehicles, as well as various track combinations. ROZWÓJ SYMULACYJNEGO NARZĘDZIA DO ANALIZY DYNAMIKI INTERAKCJI POJAZD SZYNOWY -TORStreszczenie. W ostatnich dziesięcioleciach znacznie wzrosło znaczenie modelowania i symulacji w dziedzinie systemów kolejowych. Różne rodzaje symulacji komercyjnych pakietów zostały opracowane i są używane do analizy dynamiki wydajności systemów kolejowych. Jednak czasami użytkownik musi analizować różne niestandardowe rozwiązania, a możliwość integracji dalszych zmian w strukturze takiego oprogramowania jest dość ograniczona. W związku z tym w niektórych przypadkach, w szczególności dla konkretnych zadań modelowych, realną opcją jest opracowanie narzędzi symulacyjnych, pozwalających na elastyczne i niezawodne użycie różnych konfiguracji modeli przy wykonywaniu analizy dynamicznej. Artykuł prezentuje nowe narzędzie modelowania i obliczania dynamicznych symulacji układów pojazdu szynowego. Formuły stosowane w proponowanym modelu matematycznym są oparte na technikach wieloobiektowych. 48R. Shaltout, L. Baeza, C. Ulianov

Dynamics of a Rail Vehicle in Transition Curve above Critical Velocity with Focus on Hunting Motion Considering the Review of History of the Stability Studies

“…The main reason why the results of the lateral dynamics coordinates above critical velocity vn are not shown is that such publications were interested in other coordinates or in the results obtained for a velocity below the critical one. Examples of such publications are [81][82][83][84][85][86][87][88][89][90]. J. Droździel and B. Sowiński, in [82], consider the dynamic behavior of a rail vehicle running along a TC of four types, below the critical velocity.…”

“…Energies 2024, 17, 967 8 of 20 obtained for a velocity below the critical one. Examples of such publications are [81][82][83][84][85][86][87][88][89][90]. J. Droździel and B. Sowi ński, in [82], consider the dynamic behavior of a rail vehicle running along a TC of four types, below the critical velocity.…”

“…This work aimed to compromise stability in an ST and good steering in a curved track, which is difficult in the case of a passive mechanical vehicle structure. In [89], R. Shaltout, C. Ulianov, and L. Baeza published the simulation results of lateral displacements and vehicle rotation angles in an ST, TC, and CC, albeit for low velocities. A. Lau and E. Kassa, in [86], report the results of the influence of modeling the wheel-rail contact on the dynamic behavior of the vehicle.…”

Analysis of Dynamics of Ametro Vehiclemodel With Differentialwheelsets

“…In order to investigate the influence of a differential gear on rail vehicle dynamics a simulation model was built in VI-Rail (former Adams/Rail) simulation package. The philosophy of creating a model in the software is based on the standard assumptions of multi-body modelling [16,17]. The vehicle's general inertial elements are rigid and connected by means of massless springs and dampers.…”

Investigation into nonlinear phenomena for various railway vehicles in transition curves at velocities close to critical one

“…The main reasons for not showing these results are other than lateral dynamics co-ordinates dynamical quantities particular authors are interested in or velocities below the critical one. Example publications of such type are [30][31][32][33][34][35][36][37][38]. The interesting subgroup within such publications are those based on vehicle-track models simulation, which use dynamical approach, but not the traditional engineering one, to search for proper, best or even optimum shape of TCs.…”