机械制造与自动化2024，Vol.53Issue(4)：63-66,4.DOI:10.19344/j.cnki.issn1671-5276.2024.04.011
一系钢簧断裂原因分析与高频激励试验研究
Reserch on Causes of Fracture and High-frequency Excitation Test of Primary Springs
摘要
Abstract
In order to analyze the reasons for the primary spring fracture of a certain type of EMU,high-frequency excitation tests were conducted on the bogies assembled with the steel springs,and the inherent frequency of the steel springs was determined to be 72 Hz by combining finite element calculations.By plotting the frequency response characteristic curve,it is obtained that the stress amplitude at 72 Hz is about 30 times higher than the rest of the frequency excitation.Through the theoretical calculation of the cross-impact frequencies of the line,it is found that the reason for the fracture of the steel spring of the EMU is that the train is subjected to a 71.7 Hz shock from the rail sleeper when running at 155 km/h.This frequency is close to the torsional mode frequency of the steel spring,and the steel spring resonates,causing it to fracture in the long run.关键词
动车组/一系钢簧/模态分析/台架试验/动应力Key words
EMU/primary springs/modal analysis/bench test/dynamic stress分类
交通工程引用本文复制引用
高程程,魏博文,王勇,孙希忠,赵荷花..一系钢簧断裂原因分析与高频激励试验研究[J].机械制造与自动化,2024,53(4):63-66,4.基金项目
中国国家铁路集团有限公司系统性重大项目(P2021J003) （P2021J003）
