基于相关分析的高速列车构架载荷相位重构方法

doi:10.3901/JME.2023.16.361

摘要/Abstract

摘要： 针对高速列车构架载荷谱经雨流计数后丢失载荷之间的相互关系，使载荷谱预测关键应力点损伤与实际损伤偏差较大的问题，开展高速列车构架载荷相位重构方法研究。以某型高速列车转向架构架为研究对象，通过线路实测获得载荷时间历程和关键应力点时间历程，分析关键应力测点不同载荷系分量之间的相关性以及应力与载荷分量之间的相关性。在此基础上，结合试验台加载控制方式，建立载荷相关系数和载荷相位的关系，重构因雨流计数丢失的载荷相位信息，使载荷预测损伤更接近实测应力损伤。研究结果表明，构架载荷之间的相互关系保持稳定，是重构构架载荷相位矩阵的基础；重构的载荷相位矩阵使载荷预测应力与实测应力更接近，最大误差由104%降到6%；测试时间基本对相位矩阵无影响，不同线路条件和列车运行速度对相位矩阵有一定的影响，但平均误差均不超过10%。研究工作为分立载荷谱预测损伤提供了思路，并为载荷谱扩展台架试验奠定基础。

关键词: 高速列车, 构架载荷, 相关分析, 相位重构

Abstract: Aiming at the problem that the load spectrum prediction of key stress point damage deviates greatly from the actual damage due to the loss of the correlation of loads after rain-flow counting, the phase reconstruction method of high-speed train frame load is studied. Taking bogie frame of a high-speed train as the research object, the load time history and the time history of key stress points are obtained through line measurement, and the correlation between different load system components of key stress measurement points and the correlation between stress and load components are analyzed. On this basis, the relationship between load correlation coefficient and load phase is established in combination with the loading control mode of the test bed, and the load phase information lost due to rain flow counting is reconstructed, so that the predicted load damage is closer to the measured stress damage. The results show that the relationship between frame loads is stable, which is the basis of reconstructing the phase matrix of frame loads. The reconstructed load phase matrix makes the load prediction stress closer to the measured stress, and the maximum error decreases from 104% to 6%. The testing time basically has no effect on the phase matrix, and different line conditions and train speed have some influence on the phase matrix, but the average error is not more than 10%. The research work provides an idea for damage prediction by discrete load spectrum and lays a foundation for load spectrum expansion and bench test.

Key words: high speed EMU, frame load, correlation analysis, phase reconstruction

中图分类号:

U270

李俊杰, 任尊松, 吴养民. 基于相关分析的高速列车构架载荷相位重构方法[J]. 机械工程学报, 2023, 59(16): 361-369.

LI Junjie, REN Zunsong, WU Yangmin. Phase Reconstruction Method of High-speed Train Frame Load Based on Correlation Analysis[J]. Journal of Mechanical Engineering, 2023, 59(16): 361-369.

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