Fatigue reliability evaluation of heavy-haul locomotive car body underframe based on measured strain and virtual strain

被引：10

作者：

Chen, Daoyun ^{[1
,2
]}

Xiao, Qian ^{[1
]}

Mou, Minghui ^{[3
,4
]}

Yang, Wenbin ^{[1
]}

Liu, Xinlong ^{[1
]}

Zeng, Yanjun ^{[5
]}

机构：

[1] East China Jiaotong Univ, State Key Lab Performance Monitoring & Protecting, Nanchang 330013, Peoples R China

[2] Zhejiang Normal Univ, Key Lab Urban Rail Transit Intelligent Operat & Ma, Jinhua 321005, Peoples R China

[3] East China Jiaotong Univ, Sch Transportat Engn, Nanchang 330013, Peoples R China

[4] East China Jiaotong Univ, Network & Informat Ctr, Nanchang 330013, Peoples R China

[5] State Key Lab Heavy Duty AC Drive Elect Locomot Sy, Zhuzhou 412001, Peoples R China

来源：

INTERNATIONAL JOURNAL OF FATIGUE | 2023年 / 172卷

基金：

中国国家自然科学基金;

关键词：

Fatigue reliability; Load-strain transfer coefficients; Measured strain; Virtual strain; Damage calculation;

D O I：

10.1016/j.ijfatigue.2023.107661

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Fatigue reliability evaluation of heavy-haul locomotive car body underframe was conducted based on measured strain and virtual strain. The coupler load was calibrated by combining bench test and linear fitting. Acceleration responses and dy-namic strains of key positions were measured. The load-strain transfer coefficients of the car body were obtained by finite element analysis (FEA). The virtual strain was calculated by combining the obtained coefficients with the measured coupler load history and acceleration history. The frequency spectrum of the measured strain and the virtual strain was compared. The fatigue damage and fatigue life of measured strain and virtual strain under reliabilities of 95% and 97.7% were compared.

引用

页数：13

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