轨道车辆频变刚度转臂节点机理研究与验证  

Study and Verification of Mechanism of Frequency Varying Stiffness of Railway Vehicle Arm Joint

作　　者：丁行武[1] 卜继玲[1] 李晓武 杨欣 程海涛[1] 邹波[1] DING Xingwu;BU Jiling;LI Xiaowu;YANG Xin;CHENG Haitao;ZOU Bo(Zhuzhou Times New Material Technology Co.,Ltd.,Zhuzhou 412007,China;CRRC QINGDAO SIFANG Co.,Ltd.,Qingdao 266111,China)

机构地区：[1]株洲时代新材料科技股份有限公司,湖南株洲412007 [2]中车青岛四方机车车辆股份有限公司,山东青岛266111

出　　处：《铁道学报》2021年第8期27-34,共8页Journal of the China Railway Society

基　　金：国家重点研发计划(2018YFB1201703-05);湖南创新型省份建设专项(2020WK2028)。

摘　　要：传统橡胶转臂节点难以平衡轨道车辆曲线通过性与高速运行稳定性之间的矛盾,通常采用折中设计定位刚度来处理。通过在橡胶体内嵌液压机构可以实现转臂节点的变刚度,使其具有低频低刚度和高频高刚度的频变刚度自适应特点。主要介绍新型频变刚度转臂节点的设计原理,建立其力学模型,推导动态刚度的求解方法。通过仿真计算与试验数据对比,验证该数值计算模型的可靠性,并基于此分析液压机构主要特征参数对频变刚度转臂节点动态特性的影响规律。仿真与试验结果表明:这种频变刚度转臂节点的整体动刚度水平取决于液压腔体积柔度和等效活塞面积,而动态刚度阀值频率则主要由流道长径比决定。As traditional rubber arm joints can hardly balance the contradiction between curve traffic-ability and high-speed running stability of railway vehicle,the compromise design of positioning stiffness is usually adopted to deal with it.The frequency varying stiffness of the arm joint can be realized by embedding a hydraulic mechanism in the elastomer,which provides it with the adaptive characteristics of frequency varying stiffness of low stiffness in low frequency and high stiffness in high frequency.In this paper,the design principle of this new type of arm joint with frequency varying stiffness was introduced,and the mechanical model of it was established mathematically,to derive the solution method of its dynamic stiffness.By comparing the simulation results with the experimental data,the reliability of the numerical calculation model was verified.The influence of the main characteristic parameters of the hydraulic mechanism on the dynamic characteristics of the frequency varying stiffness arm joint was analyzed.The simulation and experimental results show that the overall dynamic stiffness level of the frequency varying stiffness arm joint depends on the volume compliance of the hydraulic chamber and the equivalent piston area,while the threshold frequency of the dynamic stiffness is mainly determined by the length diameter ratio of the runner.

关 键 词：轨道车辆 频变刚度 轴箱 转臂节点 液压 

分 类 号：TU260.331[建筑科学—建筑设计及理论]