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地铁转向架构架台架试验载荷谱编制方法 被引量:6

Compilation Method of Load Spectrum for the Bench Test of Metro Bogie Frame
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摘要 采用国际通用的台架试验规范对地铁转向架构架进行疲劳评估时,会出现无法完全覆盖线路实际工况的情况。为更准确地评价构架的疲劳可靠性,在综合分析构架寿命评估要求和试验台控制方案的基础上,给出载荷相位关系及加载频率的确定方法,根据频域疲劳理论和损伤一致性原则,提出基于构架载荷和应力的线路实测数据的适用于不同相位多通道加载的加速程序载荷谱编制方法。损伤计算结果表明,基于实测数据的载荷谱计算损伤速率已覆盖实测损伤速率,校准后的损伤比值范围在1.04~6.47。将频域法损伤结果与基于时域内准静态叠加法得到的结果进行对比,结果表明,频域法和时域法的误差带在8.33%~18.60%,表明采用提出的试验台多通道加载方案,可以准确反映载荷耦合作用下结构的应力响应。该研究成果为基于实测数据的地铁转向架构架台架谱的建立提供了新思路。 When the international standard of bench test is adopted to evaluate the fatigue of metro bogie frame,the actual working condition of the line will not be completely covered.In order to evaluate the fatigue reliability of the frame more accurately,based on the comprehensive analysis of the requirements of the frame life assessment and the control scheme of th e test-bed,the determination method of the load phase relationship and the load frequency is given.According to the fatigue theory in the frequency domain and the principle of damage consistency,the method of acceleration programming load spectrum compilation suitable for different phase and multi channels loading based on the measured data of the line load and stress of the frame is proposed.The damage calculation results show that the damage rate calculated by the load spectrum based on the measured data has covered the measured damage rate,and the calibrated damage ratio ranges from 1.04 to 6.47.The error band of frequency-domain method and time-domain method is between 8.33%and 18.60%,which shows that the proposed compilation method of load spectrum for the bench test can accurately reflect the stress response of the structure under load coupling.The research results provide a new idea for the establishment of multi channels bench test spectrum of metro bogie frame based on the measured data.
作者 张子璠 杨广雪 李强 刘汉文 ZHANG Zifan;YANG Guangxue;LI Qiang;LIU Hanwen(School of Mechanical,Electronic and Control Engineering,Beijing Jiaotong University,Beijing 100044;DongFeng Motor Corporation Technical Center,Wuhan 430058)
出处 《机械工程学报》 EI CAS CSCD 北大核心 2020年第18期134-142,共9页 Journal of Mechanical Engineering
基金 国家重点基础研究发展计划资助项目(973计划,2016YFB1200404-08)。
关键词 转向架构架 台架试验 频域疲劳 UIC标准 相关性 bogie frame bench test frequency domain fatigue UIC standard correlation
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