Abstract：A Finite Element(FE) model of the coach framework is established. Based on an analysis of the existing evaluation methods for residual space in real tests and simulations, especially their shortcomings, a new evaluation method of transmission-type residual space is proposed. Then the finite element model of the coach framework is used to simulate this new evaluation method. It is shown that the coach superstructure would be plunged into the residual space, as against the regulatory requirements. The strength of the coach superstructure is less than desirable, so a method is proposed to improve the coach body framework—a ring type structure and added foot beams to connect waist rails and floor beams. The simulation results show that the improved coach body framework is satisfactory and the new evaluation method is simple, practical, accurate and reliable.
2010, Vol. 28 
