高速转向架非线性稳定性及安全裕度对策

为了满足新一代高速转向架的安全稳定性裕度要求，在构架振动报警原因分析的基础上，提出了抗蛇行减振器软约束技术对策。运行稳定性分析是指包括临界速度和动态行为在内的综合评价。临界速度取决于轮轨匹配特征，其对轮轨接触及转向架的非线性变化也将产生非常敏感的影响。动态行为评价是按照相关标准规范要求进行的构架横向加速度等安全指标评价。尽管在超临界分叉下轮对小幅值蛇行，但是由于抗蛇行减振器具有高频卸荷机制，拖车转向架动态行为也有可能达到或超过安全限制。构架横向加速度频响对比分析表明：转向架蛇行振荡是其振动频响的主要谐振成份，可以采用抗蛇行减振器软约束方式加以控制。

Non-linear stability of high-speed bogies and their safety margin strategy

In order to satisfy the safety stability-margin requirements of new-generation high-speed bogies,based on the exploration of bogie frame acceleration alarm,the soft constraint solutions for yawing and their technical implementation steps were presented.The running stability analysis is a synthetical evaluation including the critical velocity and dynamical behavior assessment.The critical velocities depend on the W/R(wheel/rail) matching features,and are influenced remarkably by the non-linear variation of b...