摘要
为研究机车轮对踏面损伤的诱发因素,基于车辆系统动力学和和赫兹非线性接触理论,在恶劣线路上对该机车动力学响应特性进行现场测试。运用频域分析方法获得了轮对和车体等主要部件在加装一系悬挂纵向减振器前后振动加速度功率谱密度变化幅频特性,并对测试数据的频响特征进行研究。试验结果表明,一系悬挂纵向减振器对轮对和车体的纵向振动有密切关系,加装一系纵向减振器对轮对纵向振动有一定的缓解作用;机车轮对的扭振是造成车轮多边形化的一个主要因素,尽管车轮多边形化非常严重,但并不剥离;在运行过程中轮对产生15~20Hz的纵向振动时,踏面剥离将成为主要的损伤形式。
The DF8B locomotive is a main trunk freight transportation diesel locomotive and can be used to study the causes of locomotive wheel tread damage. Based on vehicle dynamics and the Hertz nonlinear contact theory, we tested the locomotive dynamic responses on the harsh lines. Frequency domain analysis was used to obtain the amplitude and frequency characteristics of major components, such as the wheel and car body. The experimental results showed that the longitudinal shock absorber has a great relationship for wheel tread damage. One of the main reasons for wheel polygonization was the torsional vibration of the locomotive wheel. Although the wheel polygonization was very serious, but it doesn't peel. © 2016, Editorial Department of JVMD. All right reserved.
出处
《振动．测试与诊断》
EI
CSCD
北大核心
2016年第5期890-896,共7页
Journal of Vibration,Measurement & Diagnosis
基金
国家自然科学基金资助项目(51005190)
铁道部科技研究开发计划资助项目(2011J001-B)
西南交通大学博士生创新基金资助项目
关键词
纵向振动
踏面损伤
纵向减振器
扭振
Elastic waves
Engines
Freight transportation
Frequency domain analysis
Locomotives
Machine vibrations
Shock absorbers
Wheels
