考虑车体和构架的弹性对构架动载荷、动应力及疲劳损伤的影响

Consideration on the Effect of the Elasticity of Car-Body and Frame on the Dynamic Load, Dynamic Stress and Fatigue Damage

以装用无摇枕结构转向架的车辆为例,建立了将车体和构架分别考虑成弹性体或者刚性体的4种动力学分析模型,进行了多个速度级下的动力学分析、构架的动应力响应分析和疲劳损伤分析,给出了对比分析结果,并根据分析结果对车辆动力学建模问题提出了建议。

With the bolsterless bogie as the example, 4 dynamics analysis models in which the carbody and frame are regarded respectively as elastic and rigid structures are set up. The dynamics analysis, the dynamic stress response analysis and fatigue damage analysis of the frame under several speed classes are made. The comparison and analysis results are provided. And suggestions are given on the vehicle dynamics modeling according to the analysis results.