轨道车辆液压球铰变刚度特性试验研究

Experimental Research on Variable Stiffness Property of Hydraulic Ball Joint for Rail Vehicles

提出了一种具有变刚度特性的用于轨道车辆转向架轴箱定位系统的液压球铰,它主要通过在橡胶体中内嵌液压机构来实现动态刚度的提升。介绍了其变刚度的实现原理,并采用试验的方法重点研究了该液压球铰的频率相关性、振幅相关性和预载相关性。试验结果表明,该液压球铰能够实现低频低刚度和高频高刚度的变刚度特性,而且其变刚度特性与激励振幅和预载水平强相关。所述结构方案和研究结果对指导液体橡胶复合减振技术在轨道车辆上的工程化应用具有重要意义。

One hydraulic ball joint with variable stiffness characteristics for rail vehicles was proposed, which used hydraulic mechanism embedded in rubber elastomer to improve dynamic stiffness. The implementation principle of the variable stiffness characteristics was introduced, and the frequency dependence, amplitude dependence and pre-load dependence of hydraulic ball joint was mainly experimental researched. The test results showed that this hydraulic ball joint can achieve low stiffness at low frequency and high stiffness at high frequency, and this property is strongly related to excitation amplitude and pre-load. The structural scheme and research findings are of great significance to guide the engineering application of the liquid rubber composite vibration damping technology on rail vehicles.