摘要
提出了基于惯量匹配的试验台驱动轴负载力矩校核方法,分析了轨道轮转动惯量对牵引制动试验的影响,得出驱动轴的转动惯量是整车运行惯性力矩的6.7%,在进行车辆启动加速性能试验时,转动惯量过小会带来较大误差,而适当增大轨道轮轴上转动惯量是减小误差的唯一方法;针对试验台轨道轮与被试车辆的耦合振动问题,采用有限元法对轨道轮进行了模态分析,得到了轨道轮在前10阶振动下的试验速度等级,分析表明在一阶振动频率12.634 Hz下、对应试验车速为257 km/h时,轨道轮与车辆会产生耦合振动,在车速为127 km/h时,车轮一阶不圆会引起车轮与轨道轮的共振,在试验中应避免长时间在共振频率的速度下运行。
Method of driving axle load moment checking for roller test rig based on inertia matching was proposed. Effect of track wheel＇s inertia on traction and braking test was analyzed, which showed that inertia of track wheel was 6.7% of vehicle inertia. Too small inertia moment would cause large errors, and proper increase of track wheel moment of inertia was the only method to reduce the errors; According to coupled vibration between track wheel and car wheel, normal model analysis was proposed by using FEM, and the first 10 order model was obtained. The analysis showed that the first inherent vibration frequency was 12.634 Hz. In this frequency and corresponding speed of 257 km/h of railway vehicle in the rolling test, the coupled vibration occurred between track wheel and vehicle. At the speed of 127 kin/h, the first-order round of wheel could cause vibration of car wheel and track wheels. During the test, avoiding running in coupled vibration for a long time would be useful for test precision.
出处
《机车电传动》
北大核心
2014年第4期79-82,共4页
Electric Drive for Locomotives
基金
国家高科技研究发展计划(2011AA11A103)
关键词
滚动试验台
轨道轮
惯性负载
耦合振动
roller test rig
track wheel
inertia load
coupled vibration
