Assessment of longitudinal load spectrum characteristics and structural fatigue damage of metro vehicle body in service

IF 5.2 2区工程技术 Q1 ENGINEERING, MULTIDISCIPLINARY

Measurement Pub Date : 2024-11-16 DOI:10.1016/j.measurement.2024.116262

Chao Wang, Tao Zhu, Bing Yang, Shoune Xiao, Guangwu Yang

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引用次数: 0

Abstract

Aiming at the structural integrity requirements of service vehicles, there is an urgent need to construct a set of analytical methods based on service load characterization to realize the life assessment of the critical weak regions of the vehicle body. This study measured the longitudinal load spectrum of a metro vehicle body under a typical service line using a calibrated coupler and traction bar. Based on the signal characteristics of the longitudinal loads, a dynamic load feature decomposition method is proposed to decompose the longitudinal load features into trend and fluctuation signals to reflect the overall and local laws. The longitudinal load transfer characteristics of the vehicle body under traction, braking, linear, and curved conditions are innovatively analyzed, and a longitudinal load distribution ratio coefficient with generality is proposed as the input of effective service load. The service stress spectrum of the vital points of the vehicle body is constructed, which can more comprehensively and realistically respond to the service stress state of the vehicle body compared with the standard design loads, which further improves the accuracy of the structural integrity assessment.

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地铁车体纵向载荷谱特性和结构疲劳损伤评估

针对服务车辆的结构完整性要求，迫切需要构建一套基于服务载荷表征的分析方法，以实现对车体关键薄弱区域的寿命评估。本研究使用校准耦合器和牵引杆测量了典型服务线路下地铁车体的纵向载荷谱。根据纵向载荷的信号特征，提出了一种动态载荷特征分解方法，将纵向载荷特征分解为趋势信号和波动信号，以反映整体和局部规律。创新性地分析了牵引、制动、直线、曲线工况下车身纵向载荷传递特性，提出了具有通用性的纵向载荷分布比系数作为有效工况载荷的输入。构建了车体重要点的使用应力谱，与标准设计载荷相比，能更全面、更真实地反应车体的使用应力状态，进一步提高了结构完整性评估的准确性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Measurement 工程技术-工程：综合

CiteScore

10.20

自引率

12.50%

发文量

1589

审稿时长

12.1 months

期刊介绍： Contributions are invited on novel achievements in all fields of measurement and instrumentation science and technology. Authors are encouraged to submit novel material, whose ultimate goal is an advancement in the state of the art of: measurement and metrology fundamentals, sensors, measurement instruments, measurement and estimation techniques, measurement data processing and fusion algorithms, evaluation procedures and methodologies for plants and industrial processes, performance analysis of systems, processes and algorithms, mathematical models for measurement-oriented purposes, distributed measurement systems in a connected world.