基于空载救援工况下的公交车车体骨架模型建立及强度分析

根据美国宾夕法尼亚州立大学工程学院阿尔图纳客车测试和研究中心所编制的最新客车测试方法,对18 m公交车车体骨架在空载救援工况下的车身骨架强度要求进行建模及仿真测试分析。首先基于CAE有限元仿真平台HyperWorks,利用Hypermesh构建了一类18 m公交车车体骨架模型;其次对所构建的模型的相关参数进行设置,并对各应力点给出一种载荷处理方法;最后在空载救援工况下,对所构建的车体骨架仿真模型施加330 kN向前的拉力,并对车体骨架的多个节点进行强度仿真分析。仿真结果显示各总成最大应力值均小于对应材料的屈服强度,表明所构建的车体骨架仿真模型的建模方法以及空载救援工况下的结构强度仿真分析均达到了美国最新客车测试方法关于空载救援拖车工况的强度要求。

Establishment and Strength Analysis of Bus Body Skeleton Model Based on No-load Rescue Condition

According to the latest bus test method compiled by Altona Bus Test and Research Center of Penn State College of engineering, the strength requirements of 18 meters bus body skeleton under no-load rescue condition are modeled and simulated. Firstly, based on the CAE finite element simulation platform HyperWorks, a kind of 18 meters bus body skeleton model is constructed by HyperMesh. Secondly, the relevant parameters of the model are set, and a load treatment method is given for each stress point. Finally, under the condition of no-load rescue, the forward pull force of 330 kN is applied to the simulation model of the car body skeleton, and the strength simulation analysis is carried out for multiple nodes of the car body skeleton. The simulation results show that the maximum stress value of each assembly is less than the yield strength of the corresponding material, which shows that the modeling method of the simulation model of the car body skeleton and the structural strength simulation analysis under the no-load rescue condition all meet the strength requirements of the latest bus test method of the United States on the no-load rescue towing condition.