摘要
以某型高速动车组轴箱用双列圆锥滚子轴承为研究对象,基于有限元法建立轴承三维动力学模型并验证模型正确性。分别在轴承外圈、内圈、滚子设置不同大小缺陷进行动力学仿真,分析不同故障程度下各组件缺陷位置接触应力在时频域下变化规律。结果表明,仿真得出的故障特征频率与理论值基本一致,外圈故障特征频率清晰可见,没有发生调制现象;内圈、滚子故障特征频率存在幅值调制,这是由于其受各自转频影响产生明显边频谱,同时,发现不同缺陷大小对各故障调制结果影响不同。
Taking the double-row tapered cone roller bearing used in the axle box of a high-speed EMU as the re⁃search object,the three-dimensional dynamic model of the bearing is established based on the finite element method,and the correctness of the model is verified.The dynamic simulation of bearing outer ring,inner ring and roller with different size defects is carried out respectively,and the variation law of contact stress at the defect position of each component under different fault degree is analyzed in time-frequency domain.The results show that the simulated fault feature frequencies are basically consistent with the theoretical values,the outer ring fault feature frequencies are clearly visible,and there is no modulation phenomenon;there is amplitude modulation in the fault feature frequen⁃cy of inner ring and roller,which is due to the obvious side spectrum caused by their respective frequency conversion.At the same time,it is found that different defect sizes have different effects on the modulation results of each fault.
作者
杜志伟
甄广川
田冉
潘碧琳
申灏
杨兴宽
DU Zhiwei;ZHEN Guangchuan;TIAN Ran;PAN Bilin;SHEN Hao;YANG Xingkuan
出处
《铁道技术监督》
2021年第9期31-36,41,共7页
Railway Quality Control
基金
中国铁道科学研究院集团有限公司金属及化学研究所基金(2019SJ06)。
关键词
高速动车组
轴箱轴承
故障分析
动力学
有限元法
仿真
High-speed EMU
Axle Box Bearing
Fault Analysis
Dynamics
Finite Element Method
Simulation
