基于轮轴动应力测试的轮轨力识别与分析  

Wheel-rail force identification and analysis based on wheelset dynamic stress testing

作　　者：金鑫[1] 金新灿[1] 龚明[2] 马利军[2] 

机构地区：[1]北京交通大学轨道车辆结构可靠性与运用检测技术教育部工程研究中心,北京100044 [2]南车青岛四方机车车辆股份有限公司,山东青岛266111

出　　处：《北京交通大学学报》2012年第4期173-177,共5页JOURNAL OF BEIJING JIAOTONG UNIVERSITY

基　　金：国家自然科学基金资助项目(50975021);国家科技支撑计划项目资助(2009BAG12A07-F01)

摘　　要：以300 km/h高速动车组动力车轮轴动应力测试为基础,经过数据处理和分析,识别出切向轮轨力和横向轮轨力.针对轮轴结构受力及应力分布特点,通过Ansys软件进行有限元模型分析,找到车轮作用载荷与应变之间的关系,计算得到切向蠕滑率,并运用最小二乘法进行参数识别,初步分析得到切向轮轨力与切向蠕滑率之间的关系及切向蠕滑率与速度之间的关系.The tangential wheel-rail force and the lateral wheel-rail force are identified through analyz- ing data based on the dynamic stress testing of 300 EMU power axle. Focusing on structural force and stress distribution characteristics, the relationship between wheel load and strain is found by analyzing the model with Ansys. Through calculating, the tangential creep rate is gained. The parameter is i- dentified with Least squares. The relation between tangential force and tangential creep rate as well as the relation between tangential creep rate and vehicle speed are preliminarily analyzed.

关 键 词：轮轴动应力 切向蠕滑力 参数识别 

分 类 号：U270.11[机械工程—车辆工程]