铁路货车旁承纵向刚度建模方式探讨

Study on Longitudinal Rigidity Modeling Method of Side Bearing on Wagon

摘要: 在进行车辆动力学性能研究中，动力学仿真建模对旁承的处理通常只考虑垂向特性，重点关注垂向刚度、预压量、间隙和纵向摩擦，对于旁承的纵横向刚度往往不做处理，这与实际情况是不符的。本文在动力学建模过程中除了考虑以上参数外，还加入了旁承的纵横向刚度。研究结果表明，旁承的纵向刚度对仿真车辆的抗蛇行稳定性能影响显著，建议在日后的车辆动力学性能研究中考虑旁承这一特性。

Abstract: In the research of vehicle dynamic performance, the dynamic simulation modeling usually only considers vertical characteristics for the side bearing, focuses on vertical rigidity, statistics prel-oad amount, clearance and longitudinal friction, and ignores the longitudinal and lateral charac-teristics. It is not in conformity with the actual situation. In this paper, in addition to the above characteristics, the longitudinal and lateral rigidity characteristics of the side bearing are added to the dynamic modeling process. The results of the research show that the longitudinal rigidity of side bearing has a notability influence on anti-hunt stability of simulated vehicle. It is suggested that side bearing characteristics should be considered in the future research of vehicle dynamic performance.