基于Timoshenko梁模型的车辆轨道耦合振动分析

Analysis of Vehicle-Track Coupling Vibration Based on Timoshenko Beam Model

运用车辆 轨道耦合动力学理论,建立了基于Timoshenko梁钢轨模型的车辆 轨道耦合振动模型,分析了钢轨的固有振动特性,初步探讨了车辆 轨道系统的动力响应.结果表明,Timoshenko梁钢轨模型在固有振动及强迫振动两方面均与Euler梁钢轨模型有明显不同,前者能更详细地描述钢轨的高频特性.

Based on the theory of vehicletrack coupling dynamics, a model of vehicletrack coupling vibration is established, in which a rail is assumed to be a Timoshenko beam resting on the discrete sleepers. The natural vibrations of tracks are analyzed, and dynamic responses between vehicle and track caused by track irregularity are also preliminarily investigated. The characteristics of the natural vibration and forced vibration of the Timoshenko beam model are different from those of BernoulliEuler beam model. It is shown that the Timoshenko beam model is more applicable to describing the highfrequency vibration of rails.