Affiliation:
1. School of Mechanotronics & Vehicle Engineering, Chongqing Jiaotong University, Chongqing, China
2. Chongqing Key Laboratory for Public Transportation Equipment Design and System Integration, Chongqing, China
Abstract
Predicting the dynamic behavior of train collisions using similitude theory is a valuable design tool. However, several limitations and difficulties persist when designing a similar train model. This study proposes a mechanical equivalence similitude method when a train crashes into a rigid obstacle longitudinally, which can be used to establish similitude laws and predict the dynamic responses of a full-scale high-speed train middle vehicle. This method includes impact force equivalence (IFE) and finite-element stiffness equivalence (FESE). The aim is to overcome the insufficient accuracy of establishing a similar train model using traditional similitude methods. First, the similitude laws of the end energy absorber and the vehicle body were deduced. Subsequently, the 1/8th equivalent similar middle vehicle model of the high-speed train was established. The IFE method was employed to design a 1/8th equivalent similar model of the end energy absorber. Based on the FESE method, a 1/8th equivalent similar model of the middle vehicle body was built. Finally, the accuracy and effectiveness of a similar train model were validated through numerical simulations and tests. Comparing the results of the prototype, the errors of the dynamic responses were less than 4%, indicating that the mechanical response equivalence similitude method is effective for constructing a similar train model.
Funder
National Natural Science Foundation of China
Science and Technology Research Program of Chongqing Municipal Education Commission
Chongqing Jiaotong University Graduate Research Innovation Project Fund
China Postdoctoral Science Foundation
Natural Science Foundation of Chongqing
Chongqing Key Laboratory for Public Transportation Equipment Design and System Integration Open Fund
Cited by
1 articles.
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