Study On Energy Absorption Characteristics Of Railway Vehicle Broaching Anti-climber

With the rapid development of railway transportation, people have increasingly strongdemand for fast driving and comfortable riding. Meanwhile though, collision safety of railwayvehicles has become a serious danger. Once a high-speed train crash occurred, theconsequences could be catastrophic. And it’s difficult to provide adequate security if only bytaking some active safety protective measures. Therefore, many countries are strengtheningthe study of passive vehicle safety area. The technology has considerable practicalsignificance to improve safety performance of railway vehicles in China.Firstly, concerning the anti-climber device as one of railway vehicles passive safetyprotective measures on this study, the paper briefly discusses the categories and the structureprinciple of anti-climbers which are already existing and being in-development currently. Onthis basis, a new type of anti-climber and a systematic methodology of theoretical evaluationof energy absorption characteristics are first proposed. as well as concrete theoretical modelof evaluation methods.Secondly, based on the explicit dynamical analysis software package ANSYS/LS-DYNA,a few key influencing factors affecting on the broaching anti-climber energy absorptioncharacteristics are simulated and analysed. According to cutting force-time curves ofsimulation analysis results, the paper makes some significance analysis of the degree tofactors affecting on the energy absorption characteristics, providing scientific basis foroptimizing the structural parameters.Thirdly, to solve problems existing in the cutting anti-climber, several countermeasuresare proposed. Additionly, some engineering practices are taken as example for analysis andcomparison. According to the requirements of the energy absorber of the anti-climber ofrailway vehicle and the energy absorption principle of metal-cutting process, a new type ofbroaching anti-climber used for railway vehicles is mentioned, namely double broachinganti-climber. Depending on the valuation methodology of the energy absorptioncharacteristics, primary modeling of double broaching anti-climber is conducted, incombination of typical engineering project.Finally, energy absorption efficiency and property of broaching anti-climbers is studiedthrough some quasi-static broaching tests. The main content in the order are as the following:first of all, it is necessary to make reasonable choices for geometry parameter, cutting date and metal tube materials. And then, tension tests should be done by using a PC-controluniversal tester, aiming to obtain the mechanical property of metal tube materials after heattreatment. Last but not least, some quasi-static broaching tests are carried out to get theforce-load-displacement curves, thus evaluating the energy absorption efficiency and propertyof different types of broaching anti-climbers.This paper has system research on the energy absorption property by the technical routeof theoretical exploration, simulation analysis and experimental verification, which is boundto provide guidance for the further study on broaching anti-climbers, end up with promotingthe development of domestic passive safety protection.