期刊
INTERNATIONAL JOURNAL OF DAMAGE MECHANICS
卷 31, 期 4, 页码 605-622出版社
SAGE PUBLICATIONS LTD
DOI: 10.1177/10567895211046043
关键词
Fatigue; damage; carbody; longitudinal load; accumulation
资金
- National Research Foundation of Korea (NRF) - Korea government (MSIT) [NRF-2019R1G1A1004577, 2019R1A5A808320112]
This paper proposes a multi-disciplinary analysis method for evaluating the fatigue life of railway vehicle car body structure under random dynamic loads, combining Multi-Body System simulation and finite element method. The study shows that longitudinal loads significantly contribute to the fatigue damage of the carbody.
In this paper, a multi-disciplinary analysis method is proposed for evaluating the fatigue life of railway vehicle car body structure under random dynamic loads. Firstly, the hybrid fatigue analysis method was used with Multi-Body System simulation and finite element method for evaluating the carbody structure dynamic stress histories. The dynamics stress is calculated from the longitudinal load using longitudinal train dynamics. Secondly, the nonlinear damage accumulation model was used in fatigue analysis, and carbody structure fatigue life and fatigue damage were predicted. The mathematical model simulations are compared with results produced experimentally, showing good agreement. Finally, the mode is determined after the finite element model is established. To achieve the dynamic stress at each node, the modal response is used as excitation. The carbody damage was obtained by combining dynamics stress with the NMCCMF damage accumulation model. As a result, the effect of longitudinal load on carbody fatigue damage is investigated. The longitudinal load contributes significantly to the fatigue damage of the carbody.
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