Fatigue Reliability of Welded Frame-Type Bogie Frames

YANG Zhongliang; ZHAO Chunlei; XUE Junqian; HE Maosheng

doi:10.3969/j.issn.0258-2724.20240227

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Journal of Southwest Jiaotong University > 2026 >

YANG Zhongliang, ZHAO Chunlei, XUE Junqian, HE Maosheng. Fatigue Reliability of Welded Frame-Type Bogie Frames[J]. Journal of Southwest Jiaotong University. doi: 10.3969/j.issn.0258-2724.20240227

Citation:

YANG Zhongliang, ZHAO Chunlei, XUE Junqian, HE Maosheng. Fatigue Reliability of Welded Frame-Type Bogie Frames[J]. Journal of Southwest Jiaotong University. doi: 10.3969/j.issn.0258-2724.20240227

YANG Zhongliang, ZHAO Chunlei, XUE Junqian, HE Maosheng. Fatigue Reliability of Welded Frame-Type Bogie Frames[J]. Journal of Southwest Jiaotong University. doi: 10.3969/j.issn.0258-2724.20240227

Citation:

YANG Zhongliang, ZHAO Chunlei, XUE Junqian, HE Maosheng. Fatigue Reliability of Welded Frame-Type Bogie Frames[J]. Journal of Southwest Jiaotong University. doi: 10.3969/j.issn.0258-2724.20240227

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Fatigue Reliability of Welded Frame-Type Bogie Frames

doi: 10.3969/j.issn.0258-2724.20240227

1.
State Key Laboratory of Rail Transit Vehicle System, Southwest Jiaotong University, Chengdu 610031, China
2.
School of Locomotive and Rolling Stock Engineering, Dalian Jiaotong University, Liaoning 116028, China
3.
Technology Development Center, CRRC Qiqihar Rolling Stock Co., Ltd., Qiqihar 161002, China
4.
School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China

Received Date: 24 May 2024
Rev Recd Date: 06 Sep 2024

Available Online: 21 Oct 2025

Abstract

Abstract

The welded frame-type bogie is a newly developed product in recent years, and its operational safety and reliability are crucial. A fatigue reliability assessment of the welded frame-type bogie frames was carried out. A fatigue life assessment procedure for welded structures was proposed based on the equivalent structural stress (ESS) method and the main S-N curve model, and a formula for determining the stress state of welded structures under multiple loads was derived. According to the BS EN15085-3:2007 standard for the design of welded structures in railway vehicles, combined with finite element model simulations and fatigue test data, the stress state and fatigue life of the bogie frame weld joints were comprehensively analyzed. A finite element model including weld details was established to simulate the stress state under actual operating conditions. Fatigue life simulations were performed using the load spectrum provided by the fatigue test outline, and the stress state level of the weld joints was determined according to the standards to assess the quality grade and inspection grade of the welds. Fatigue tests of the bogie frames were conducted according to the EN13749:2011 standard. The results show that the ESS method, combined with the BS EN15085 standard, can accurately predict the fatigue life of weld joints. The total damage of key welds in the bogie frames is less than 1, meeting the design requirements for fatigue life. After fatigue tests, no cracks are detected by magnetic particle inspection, meeting the fatigue strength requirements. The maximum stress factor of the frame welds calculated by ESS is 0.939. The stress state level of each key weld is clarified based on the stress factor values, providing a basis for optimizing the quality and inspection grade of the welds.
- welded frame,
- structural stress,
- fatigue strength,
- stress factor,
- stress state

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References(23)

References

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Fatigue Reliability of Welded Frame-Type Bogie Frames

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