Abstract：The overhead rigid catenary cantilever support device is an important support component of the overhead rigid catenary.In actual work, with the change of the dynamic contact force of the pantograph-catenary, the support device is subjected to complex and variable loads, so it is required to have a high reliability.In order to study the vibration characteristics analysis and structural optimization of the overhead rigid catenary cantilever support device, this paper firstly determined the maximum stress point by the finite element analysis of the cantilever support device, and extracted the natural frequency and mode shape of the cantilever support device by modal analysis.Secondly, a dynamic stress collection test combined with the results of finite element analysis was used to determine its prone to fatigue failure parts, and analyze vibration characteristics.Finally, based on the results of vibration analysis and modal analysis, and based on the discontinuous variation of the thickness and stiffness of the components of the cantilever support device, the structure was optimized and verified with the goal of increasing the first-order natural frequency.The results show that as the thickness increases, the natural frequency of the cantilever support device increases correspondingly.The optimized torsion frequency of the cantilever support device increases from 16.75 Hz to 22.40 Hz, away from the vibration frequency of the dynamic lift signal of the pantograph-catenary.This significantly improved the torsional vibration shape of the arm support device.
李枭俊1，甘磊1，陈展1，刘兰2，吴积钦1，闫雅斌2. 刚性接触网腕臂型支持装置的振动特性分析与结构优化[J]. 振动与冲击, 2021, 40(12): 203-209.
LI Xiaojun1,GAN Lei1,CHEN Zhan1,LIU Lan2,WU Jiqin1,YAN Yabin2. Vibration characteristics analysis and structural optimization of the overhead rigid catenary cantilever support device. JOURNAL OF VIBRATION AND SHOCK, 2021, 40(12): 203-209.
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