【作者】 李志强；

【导师】 赵隆茂；

【作者基本信息】 太原理工大学 ， 固体力学， 2003， 硕士

【摘要】 随着计算机的迅猛发展，数值模拟已成为分析和解决工程实际问题的一种必不可少的手段。特别是近年来，有限元法以方便、快捷、精度高、周期短、适应性广等优点在工程中得到了越来越广泛的应用。然而，有限元法在机车车辆／轨道系统耦合动力学中的应用仍处于起步阶段。为了克服传统多刚体系统动力学研究方法在建模及计算方面的局限性，比较真实地反映车辆／轨道系统的相互作用和相互影响。本文采用FEMB前后处理程序建立了车辆／轨道耦合系统的有限元模型，利用LS—DYNA3D非线性动力分析程序来研究车辆／轨道系统冲击动力响应问题，试图将其先进技术深入地应用到车辆／轨道大系统的其它领域，探讨一些传统研究方法难以解决的问题。 车辆与轨道的动态相互作用问题，是铁路轮轨接触式运输系统中最基本的问题，它直接制约着铁路运营速度的提高和运载重量的增加。本文在建立车辆／轨道系统有限元模型的基础上，着重对车辆通过轨道接头处引起的冲击问题进行了计算机模拟，并与车辆／轨道系统现场实验测得的数据进行了对比，验证了有限元模型的正确性，进一步分析了轨道系统的动态响应，为提高车辆／轨道系统的动态性能提供有价值的数据。 本文的研究表明，利用有限元法的思想来研究车辆／轨道耦合动力学问题是可行的，它还具有其他传统方法无可比拟的优越性，并具有十分重要的应用价值。更多还原

【Abstract】 With the rapid development of computers, numerical simulation is being a necessary approach to analyze and solve engineenwproblems. FEM(fmite element method) is being more and more extensively used due to the advantage of convenience, high precision, short cycles and broad suit last years. However, the application of FEM in SCDOV/T(System Coupling Dynamics of Vehicle/Track) is still at its initial stage. To overcome the limitation of the conventional multi-rigid system dynamics in modeling Vehicle/Track systems and calculating their interaction, and to truly present the interaction and intereffect Vehicle/Track systems, Vehicle/Track Coupling System model is built by using FEMB Pre/Post Process code in this paper. The problems are analyzed by using structure nonlinear dynamic response analysis code LS-DYNA3D , the advance techniques of FEM is introduced more extensively and deeply into the other fields of SCDOV/T analysis to solve some difficult problems faced by traditional methods.The dynamic interaction between vehicle and track is one of fundamental problems among railway wheel/rail contact transporting system, it directly constrains the increase of railway running speed and load-carrying. The paper presents the computer simulation on the wheel/rail impact response at a rail joint. The results of the the simulation are compared with that of the experiment, and the model is validated. The valuable data for improving the dynamic performance of SCDOVT is provided..The study in this paper shows that SCDOV/T problems can be processedby using FEM, but FEM has itself advantages over the other conventional methods. It is expected FEM will be employed extensively in the field of SCDOV/T analysis.更多还原