摘要
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。
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 both W/R contact and bogies themselves. The dynamical behavior evaluations are implemented according to the evaluation on the safety index of bogie＇s frame lateral acceleration, etc. Due to the anti-hunting dampers having the high-frequency blowing-off mechanism, the safety limits may still be reached or exceeded by the dynamical behaviors of trailer bogies in spite of the small amplitude of wheelset hunting under the subcritical bifurcation. The lateral acceleration frequency response analysis of bogie＇s frame show that the hunting oscillation is the main harmonic component in the vibration frequency responses, which can be controlled by the soft constraint solutions for yawing.
出处
《振动与冲击》
EI
CSCD
北大核心
2011年第8期161-168,共8页
Journal of Vibration and Shock
基金
铁道部计划项目(2011J013-B)
西南交大牵引动力国家实验室开放基金项目(TPL1102)
关键词
高速列车
踏面磨耗
抗蛇行减振器
安全稳定性裕度
high-speed railway trainset
tread wear
anti-hunting damper
safety stability-margin
