中国铁道科学2026，Vol.47Issue(3)：75-84,10.DOI:10.3969/j.issn.1001-4632.2026.03.07
基于载荷谱架构和实测动应力的构架载荷谱建立方法
Method for Establishing Load Spectrum of Bogie Frame Based on Load Spectrum Architecture and Measured Dynamic Stress
摘要
Abstract
Aiming at the problem that the traditional method for establishing load spectrum of bogie frame relies on large-scale measured load data,this paper proposes a load spectrum establishment method based on load spectrum architecture and measured dynamic stresses.Firstly,based on the analysis of the load system composition of the bogie frame,the loads on the bogie frame under typical lines are measured using an instrumented force-measuring bogie frame,along with the dynamic stresses of the bogie frame under long-term and wide-area service conditions.Secondly,the correlation coefficient is used to quantitatively characterize the correlation between measured loads,and a phase loading method matching the correlation is designed to establish a load spectrum architecture covering three core elements:load phase,load frequency,and load amplitude.Finally,based on the calculated actual service damage of the bogie frame and the damage predicted by the load spectrum,a damage-consistent calibration of the load spectrum is performed.The calibrated load amplitude is obtained through a calibration coefficient,thereby establishing a damage-consistent load spectrum suitable for quantitative fatigue life assessment.The results show that the load spectrum obtained by this method can accurately reproduce the actual service damage of the bogie frame,with a deviation from the actual equivalent stress amplitude of less than 12％,indicating that the proposed load spectrum establishment method is reasonable and feasible.This method can effectively reduce reliance on large-scale measured load data,shorten the load spectrum development cycle,and is suitable for quantitative fatigue life assessment of the bogie frame.关键词
高速动车组/转向架构架/载荷谱/动应力/疲劳寿命评估/损伤一致校准Key words
High-speed EMU/Bogie frame/Load spectrum/Dynamic stress/Fatigue life assessment/Damage-consistent calibration分类
交通工程引用本文复制引用
齐鹏宇,姬程翔,王华胜,李强..基于载荷谱架构和实测动应力的构架载荷谱建立方法[J].中国铁道科学,2026,47(3):75-84,10.基金项目
国家自然科学基金铁路基础研究联合基金资助项目(U2568227) （U2568227）
中国铁道科学研究院集团有限公司院基金课题(2024YJ082) （2024YJ082）
