Theory and practice for assessing structural integrity and dynamical integrity of high-speed trains  

作　　者：Weihua Zhang Yuanchen Zeng Dongli Song Zhiwei Wang 

机构地区：[1]State Key Laboratory of Rail Transit Vehicle System,Southwest Jiaotong University,Chengdu,China [2]School of Mechanical Engineering,Southwest Jiaotong University,Chengdu,China

出　　处：《Railway Sciences》2024年第2期113-127,共15页铁道科学（英文）

基　　金：This work was partly funded by the National Key R&D Project of China(2021YFB3400704);China State Railway Group(K2022J004 and N2023J011);China Railway Chengdu Group(CJ23018).

摘　　要：Purpose–The safety and reliability of high-speed trains rely on the structural integrity of their components and the dynamic performance of the entire vehicle system.This paper aims to define and substantiate the assessment of the structural integrity and dynamical integrity of high-speed trains in both theory and practice.The key principles and approacheswill be proposed,and their applications to high-speed trains in Chinawill be presented.Design/methodology/approach–First,the structural integrity and dynamical integrity of high-speed trains are defined,and their relationship is introduced.Then,the principles for assessing the structural integrity of structural and dynamical components are presented and practical examples of gearboxes and dampers are provided.Finally,the principles and approaches for assessing the dynamical integrity of highspeed trains are presented and a novel operational assessment method is further presented.Findings–Vehicle system dynamics is the core of the proposed framework that provides the loads and vibrations on train components and the dynamic performance of the entire vehicle system.For assessing the structural integrity of structural components,an open-loop analysis considering both normal and abnormal vehicle conditions is needed.For assessing the structural integrity of dynamical components,a closed-loop analysis involving the influence of wear and degradation on vehicle system dynamics is needed.The analysis of vehicle system dynamics should follow the principles of complete objects,conditions and indices.Numerical,experimental and operational approaches should be combined to achieve effective assessments.Originality/value–The practical applications demonstrate that assessing the structural integrity and dynamical integrity of high-speed trains can support better control of critical defects,better lifespan management of train components and better maintenance decision-making for high-speed trains.

关 键 词：Structural integrity Dynamical integrity Vehicle system dynamics High-speed trains BOGIE Integrity assessment FATIGUE 

分 类 号：U292.914[交通运输工程—交通运输规划与管理]