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Study on the Mechanism of Corrugation Development (1995)

波纹发展机理研究（1995）

基本信息

批准号：
06650277
负责人：
SUDA Yoshihiro
金额：
$ 1.47万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1994
资助国家：
日本
起止时间：
1994 至 1995
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-06650277/
关键词：
corrugation wavy formation by wear rolling contact contact vibration creepage wear vibration Vibration Damping Corrugation Contact mechanics Contact vibration High damping matarial High damping alloy

项目摘要

The mechanism of corrugation phenomena on the rolling contact has not been cleared in detail. This phenomenon is wavy surface deformation after repeated contacts such as rail surface, roller of mill, and causes sever vibration and noise. This study is to clear the mechanism and find the solution to prevent.Experimental study of corrugation developed has been carried out using a corrugation simulator. This simulator can apply longitudinal and lateral creepage on rolling contact surfaces and measure vibrations, creepage, and surface deformations simultaneously throughout the corrugation development under longitudinal and lateral creepage.The following results were obtained : Creepage vibration coupled with vertical vibration has been observed. The wear rate determined by these coupled vibrations agreed well with the deformation of the surface profile. Therefor, the cause of this type of corrugation is periodic wear caused by the coupled vibration between vertical vibration and creepage vibration.In the experiments, the assumption of the rolling contact of two wheels is applied but the corrugation of the rail is also considered. The rail supported by the tie and the traveling wheel are identified to the elastically supported beam and the discrete spring-mass system. The coupled natural frequency of the system is affected by the contact spring, so it is important to consider this effect for corrugation studies.

滚动接触中的摩擦现象的机理还没有被详细地阐明。这种现象是钢轨表面、轧机轧辊等反复接触后产生的波浪形表面变形，引起严重的振动和噪声。为了弄清其机理，找到解决方法，利用热模拟器对研制的热模拟器进行了实验研究。该模拟器可以在滚动接触表面上施加纵向和横向蠕变，并在纵向和横向蠕变下的整个蠕变发展过程中同时测量振动、蠕变和表面变形，得到以下结果：观察到了与竖向振动耦合的蠕变振动。由这些耦合振动确定的磨损率与表面轮廓的变形一致。试验中采用了两轮滚动接触的假设，但也考虑了钢轨的弯曲变形。将轨枕支承的钢轨和行走轮等效为弹性支承梁和离散弹簧-质量系统。接触弹簧对系统的耦合固有频率有一定的影响，因此在振动分析中考虑接触弹簧的影响是非常重要的。