Dynamic Simulation and Safety Investigation of Rail Vehicles in Consideration of Earthquakes
Date Issued
2006
Date
2006
Author(s)
Hung, Chieh-Jen
DOI
zh-TW
Abstract
The present study focuses on the dynamic simulation and safety investigation of rail vehicles in consideration of earthquakes. The mathematical model consists of a semi-vehicle system having 16-degree-
of-freedom, and quantities such as conicity, creep force and track irregularity are considered. Based on the model, some numerical simulation results are verified by the field test data of a certain kind of train operated by Metro Taipei System. After the verification, dynamic responses of the front wheelset of the train running at different speeds are obtained, and the stability of the train is discussed accordingly. It is found that dynamic instability occurs when the train runs at the speed around 155 km/hr. With regard to the safety when an earthquake occurs during the train’s stationary cruise, Nadal ratio limit and a wheel load reduction criterion are used for judgments. It is found that the train is safe running on either the ground or elevated bridges when an earthquake as large as that recorded in Taipei during the famous Chi-Chi earthquake occurs suddenly. Moreover, it is found that both Nadal ratio limit and the wheel load reduction criterion should be used to investigate the safety of the train when the train runs on curved tracks.
Subjects
軌道車輛
動態模擬
軌道不平整
穩定度
地震
出軌
彎軌
Railway Vehicle
Dynamic Simulation
Track Irregularity
Stability
Earthquake
Derailment
Curved track
Type
thesis
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