局部不平顺的恶化对机车轮轨垂向力的影响  

Analysis of the Deterioration of Local Irregularity Excitation on Locomotive Wheel-Rail Vertical Force

作　　者：陈迪来[1] 刘建新[2] 李国朋[2] 胡志柯 

机构地区：[1]西南交通大学机械工程学院,四川成都610031 [2]西南交通大学牵引动力国家重点实验室,四川成都610031

出　　处：《机械设计与制造》2014年第11期223-227,共5页Machinery Design & Manufacture

基　　金：国家自然科学基金项目(51375403);国家重点实验室自主课题(2012TPL-T09)

摘　　要：通过MATLAB软件模拟局部不平顺,作为机车模型的外部激扰输入,根据机车动力学理论,以机车轮轨垂向力指标为依据,运用SIMPACK多体动力学仿真软件,分析谐波型局部不平顺沉降的恶化及交点型局部不平顺凸起的恶化对轮轨系统动力性能的影响。仿真结果表明,当谐波型局部不平顺发生沉降恶化时,即使恶化的幅值较小,也会造成轮轨动力响应的严重恶化,引起强烈的轮轨冲击振动;并且速度越大,轮轨动力作用越剧烈。当交点型局部不平顺发生凸起恶化时,在相同速度下,不同恶化时期的轮轨垂向力的最大值基本不变,但轮轨垂向力的最小值变化较大,导致轮重减载率变大,影响机车运行的安全。The local irregularity was simulated by the MATLAB software, inputted to the locomotive model as external excitation. The locomotive wheel-rail dynamics index in the locomotive vertical force theory was based on. By means of the dynamics simulation software SIMPACK, the influences of the deterioration of harmonic local irregularity settlement and nodical local irregularity bump on the locomotive wheel-rail dynamic performance was analyzed. The simulation results show that when harmonic local irregularity deterioration occurs, even if small amplitude deteriorates, will cause serious deterioration of wheel-rail dynamic response and strong wheel-rail shock and vibration. The wheel-rail dynamic forces increases with the speed increasing. When nodical local irregularity bump deterioration occurs, at the same speed, in different periods the maximum vertical force of the wheel-rail deterioration is stable but the minimum value decrease more causes the reduction rate of wheel load increases, influences the safe operation of locomotive.

关 键 词：局部不平顺 发展恶化 机车 轮轨作用 

分 类 号：TH16[机械工程—机械制造及自动化]