基于有限元和模态法的轮轨动力对比分析

The Comparative Analysis of Vehicle-Track Dynamics on Finite Element Method and Modal

目前,分析车辆-轨道耦合动力学的主要方法有有限元法和模态法,为深入对这两种方法进行比较,分别利用有限元法和模态法建立车辆-轨道垂向耦合动力学计算模型。同时将轨道高低不平顺视为平稳各态随机特征,考虑美国轨道6级谱,仿真计算系统垂向耦合振动。在时域范围内对二者仿真结果进行比较。通过对所获结果的观察分析得出有限元法和模态法这两种方法在仿真计算车辆-轨道垂向动态耦合响应上具有同等的计算效果,但模态法计算速度快,有限元法比模态法精确。

Currently in China ,main method to analysis vehicle‐track coupling dynamics are finite element and modal method .To further compare these two methods .Vehicle‐Track vertical coupling dynamics model was established by finite element and modal respectively .Then entered the United States track six spectra ,simulated and computed vertical coupling vibration of systems through regarding the track vertical irregularity as stationary stochastic characteristics of each state .Compared the two conclusion in the time domain .By observing and analyzing the results obtained . Those two methods have the same effect on simulating and calculating Vehicle‐T rack vertical coupling dynamic response .But comparatively speaking , modal method calculation speed ,FEM more accurate than the modal method .