铁道科学与工程学报2024，Vol.21Issue(7)：2957-2968,12.DOI:10.19713/j.cnki.43-1423/u.T20231653
轮轨作用力与垂向载荷位置的轨旁识别法研究
Wayside identification method for railway wheel rail force and vertical load position
摘要
Abstract
To solve the problems of complex manufacturing processes,high manufacturing costs,and inability to measure wheel rail contact positions in existing wheel rail force identification methods,a new wayside identification method was proposed.This method aimed to measure the magnitude of lateral and vertical wheel rail contact forces,as well as the position of vertical load.Based on the decoupling of multiple loads in wheel rail contact,a theoretical relationship model was established,linking the magnitudes of lateral and vertical wheel-rail contact forces and the position of the vertical contact force to the vertical strain summation and strain subtraction on both sides of the rail web.Subsequently,a reverse calculation model for identifying the magnitude and position of wheel rail force was obtained based on the calculation of strain on both sides of the rail web.An orthogonal strain gauge bridge,designed to act on both sides of the rail web,was implemented to identify the strain responses corresponding to wheel-rail contact loads at the rail web position.The designed bridge performs arithmetic operations on strains from both sides of the web while simultaneously considering temperature self-compensation.Relationship coefficients between multiple loads and strains on both sides of the web were obtained through loading calibration experiments.Randomly loading tests were conducted to validate the accuracy of identifying the magnitudes of lateral and vertical wheel-rail contact forces,as well as the positions of vertical contact forces.The accuracy of identifying the magnitude of wheel rail contact forces using the new measurement method and the national standard method was compared and analyzed in vehicle tests.The research results can indicate that the proposed wheel-rail contact force identification method achieves an error within 6.2%for force magnitude and 7.6%for the position of the vertical load,thereby realizing accurate identification of wheel-rail contact force magnitudes and vertical load eccentric positions using the wayside identification method.The research results can provide scientific data support for further ensuring the precise assessment of the reliable serviceability of rails.关键词
轮轨接触力/轨旁法/接触位置/理论公式/有限元分析/识别电桥Key words
wheel rail contact force/wayside method/contact location/theoretical formula/finite element analysis/identification bridge分类
交通工程引用本文复制引用
王祉歆,周伟,王雅昭,孙博,闫宏凯,方聪聪..轮轨作用力与垂向载荷位置的轨旁识别法研究[J].铁道科学与工程学报,2024,21(7):2957-2968,12.基金项目
国家重点研发计划(2022YFF0609400) （2022YFF0609400）
中国铁路乌鲁木齐局集团有限公司科技研究开发计划重点课题(WLMQ-JGBM-KXB-KWB-2022-0002) （WLMQ-JGBM-KXB-KWB-2022-0002）
