The Finite Element Analysis And Structure Optimize Of Railway Vehicle Battery Box Against Shock Vibration

In recent years, in our country, the urban and intercity rail traffic has developed rapidly,providing a way to travel fast, safely and punctually, combined with the characteristics ofenergy conversation, environmental protection and land saving. Rail traffic is worldwideconsidered as the best way or choice for the solution to the problem of urban and intercitytraffic.Battery is an important equipment of a railway vehicle, which, in emergency cases, canoperate as a backup power source for ventilation, lighting, monitoring, and communicationand keep the basic power supplying for the car when the main power supplying system is outof order. The battery housing is the load-carrying container of batteries, which should ensurethe safety against shock vibration, as well as the basic functions of load-bearing and makingit convenient for mounting and dismounting. The traditional battery box adoptedbending-steel-plate structure which has the following shortages: low strength, low integratedreliability, not convenient for fabrication etc. and it can not ensure the strength required underthe shock vibration as well as the inaccuracy of the box size. This article discusses a new typeof battery box whose main frame is made up by welding rectangular stainless steel pipes.Within the frame there is a batter-carrying pulley making it easy to pull batteries out whenservicing.The total weight of a battery pack is about1135kg, therefore, the box requiresreasonable structure, high strength, the capability of heavy load-carrying, the convenient forpushing in or pulling out the batteries and the distortion caused by battery deadweight shouldbe avoided.This article first made a brief introduction to the railway vehicle and its batteries,secondly, it discussed the basic theory of finite element analysis and then, followed by thediscussion about the design of the railway vehicle battery-box structure. Based on the abovediscussion, the battery-box finite element modeling and analysis are made by using thesoftware of ANSYS, CATA, Hyper mesh and solid works. The article analyzed thebattery-box mechanical responses under three different working-condition shock loads.According to the results of stress analysis, to calculate the possible damage part and form andimprove the structure. The main beam is optimized. After the finite element analysis andoptimization, the production’s shock vibration experiment is made and finally the design purpose is reached.