Rapid Analysis Method of Train Energy Distribution

Abstract

Disclosed is a method for quickly analysing train energy distribution, comprising the steps of: using HYPERMESH software to establish a train body rigidity model, a coupling buffer apparatus model, and a wheel and rail model, wherein the wheel and rail model comprises train body weight information, the degree of freedom state of the train body material, model unit information, standing and braking information, and moving wheel and rail information; applying the dead weight of the train, including the gravitational acceleration of the moving train and the stationary train; establishing contact relationships, including contact inside the moving train, contact inside the stationary train, contact between the moving train and the stationary train, and contact between wheels and rail; defining an initial impact speed of the moving train; defining output information; outputting a calculation file and submitting same to an LS-DYNA platform for calculation; reading the calculation result information and performing analysis and judgment according to the calculation result, and then, if design requirements are met, terminating the analysis and otherwise, returning to modify design parameters for re-calculations. The present invention can quickly achieve an energy distribution analysis, as a model is established within 8 hours and one calculation cycle is completed in 10 minutes.

Description

technical field [0001] The invention relates to the field of train passive safety analysis, in particular to a method for quickly realizing the energy distribution of the vehicle end in the early stage of rail passenger vehicle design. Background technique [0002] With the improvement of train speed and operating efficiency, collision accidents occur frequently during the operation of trains, and people pay more and more attention to them. The occurrence of train collision accidents not only threatens the lives of passengers, but also has huge economic losses and reputational impacts. With the 7.23 high-speed train rear-end collision accident and the Shanghai subway rear-end collision accident, it shows that even if active protection measures such as advanced signaling, dispatch management, and program management are adopted, train collision accidents are still inevitable. Therefore, it is worthy of our in-depth study to do a good job in passive safety protection to protect...

AI Technical Summary

Problems solved by technology

[0003] Due to the limitation of models and computer hardware conditions, domestic train collision energy absorption analysis mostly adopts single-section vehicle with driver's cab collision rigid wall for front-end energy absorption research, reflecting the energy absorption of vehicle end structures, and it is impossible to predict the energy absorption of energy-absorbing devices between vehicles Energy status, the calculation of energy allocation in the early stage of national highway bus design is mostly monopolized by the American OLEO company, which uses its own internally developed software for calculation. The disadvantages of this cooperation method are that the communication and information feedback are not timely, delaying the design progress and increasing the design cost; The simulation engineers of domestic rail car manufacturers also try to use the train finite element marshalling model for simulation, which will also bring a lot of calculation time. Each calculation requires hundreds of hours, prolonging the design cycle and increasing the design cost.

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