Influence of Suspension Stiffness Distributions on Vibration of Heavy-haul Locomotive
The vertical heavy -haul locomotive-track coupled dynamic model was established. On this basis,the vertical stiffness radio of the secondary suspension to the primary suspension and the total static deflection were related by a mathematical formula. A Chinese typical four-axle locomotive with 25t axle load and the heavy-haul line were taken as the research objects. The wheel flat was regarded as the input excitation of the system. The influence of vertical stiffness distributions of the heavy-haul locomotive suspension system on the dynamic wheel -rail force and vibrations of the locomotive were investigated in time domain while the total static deflection was considered as a con -stant. The results show that the stiffness ratio affects the natural frequency of car body and wheel /rail dynamic interaction slightly. With the increase of ratio , the vertical vibration natural frequency of bogie frame decreases first and then increases ,but the variance is less than 1. 3 Hz. It is in the frequency range from 2Hz to 32Hz that the stiffness ratio has an obvious influence on the vertical vi -bration of locomotive. In this frequency band , increasing the ratio can reduce the vibration of bogie frame,but aggravate the vibration of car body.
Pengfei LIU Wanming ZHAI Kaiyun WANG Quanbao FENG
Train and Track Research Institute , State Key Laboratory of Traction Power, Southwest Jiaotong Univ R&D Center, Datong Electric Locomotive Limited Company ,NCR, Datong 037038, China
国际会议
5th International Symposium on Environmental Vibration(第五届环境振动国际研讨会)
成都
英文
741-747
2011-10-20（万方平台首次上网日期，不代表论文的发表时间）