考虑柔性的货车动力学研究及建模优化  

Dynamic Analysis and Modeling Optimization of Freight Trains Considering Flexibility

作　　者：李文韬[1] 张卫华[1] 苗海涛[1] 

机构地区：[1]西南交通大学牵引动力国家重点实验室,成都610031

出　　处：《失效分析与预防》2012年第3期137-142,共6页Failure Analysis and Prevention

基　　金：国家973计划项目(2007CB714700);国家科技支撑计划项目(2009BAG12A01)

摘　　要：应用柔性多体系统动力学进行货车动力学仿真研究,以货车C70为研究对象,把车体、侧架和摇枕作为柔性体,其余作为刚体,组成刚柔耦合动力学模型进行动力学仿真计算,分别在空、重车情况下与多刚体模型车辆振动响应、动力学性能结果对比,寻找几种模型不同工况下差异,提出最优建模方式。仿真结果表明:研究车辆系统振动响应时可以忽略侧架和摇枕柔性,而车体柔性影响明显;对于车辆运行稳定性和平稳性车体、侧架和摇枕柔性有一定影响但是影响不大,对于曲线通过性能有必要同时考虑车体和侧架柔性影响。Multi-flexible-body system dynamics analyzing method was used to simulate the dynamics response of freight trains, freight train C70 was studied. The body, side frames and bolsters were thought as flexible parts and other parts were thought as rigid, to construct a rigid-flexible coupling system. The vibration response and dynamic performance of the rigid-flexible coupling system were compared with those of the rigid system under empty or loading conditions to find the differences between the several models under different conditions and propose an optimum modeling approach. Simulation results show that the side frame and bolster flexibility can be ignored when studying the vibration response of the vehicle system, while the body flexibility has a significant influence on the vibration response. The influence of the side frame and bolster flexibility on the running stability and comfort index is not very great. It is necessary to take into account both the body and the side frame flexibility when researching the performance of freight train running in curvilinear path.

关 键 词：货车 刚柔耦合动力学 振动响应 动力学性能 建模优化 

分 类 号：U270.11[机械工程—车辆工程]