This paper proposes a novel collision post structure designed to improve the crashworthiness of subway cab cars.The structure provides two innovative features:1)a simpler connection between the post and the car roof,w...This paper proposes a novel collision post structure designed to improve the crashworthiness of subway cab cars.The structure provides two innovative features:1)a simpler connection between the post and the car roof,which gives a more reasonable load transfer path to reduce the stress concentration at the joint;and 2)a stiffness induction design that provides an ideal deformation model to protect the safe space of the cab cars.The novel collision post structure was evaluated with finite element analysis,and a prototype cab car was mechanically tested.The results demonstrate that the deformation response was stable and agreed well with the expected ideal mode.The maximum load was 874.17 kN and the responses remained well above the elastic design load of 334 kN as required by the design specification.In addition,there was no significant tearing failure during the whole test process.Therefore,the novel collision post structure proposed has met the requirements specified in new standard to improve the crashworthiness of subway cab cars.Finally,the energy absorption efficiency and light weight design highlights were also summarized and discussed.展开更多
可拆卸式司机室可显著提高其内部设备的装配效率及可维修性,但车体耐撞性不足。文章以某型机车为研究对象,对基于可拆卸式司机室的车体结构及其耐撞性进行了研究,并建立有限元模型进行了仿真分析。结果表明:该车体具有良好的耐撞性,纵...可拆卸式司机室可显著提高其内部设备的装配效率及可维修性,但车体耐撞性不足。文章以某型机车为研究对象,对基于可拆卸式司机室的车体结构及其耐撞性进行了研究,并建立有限元模型进行了仿真分析。结果表明:该车体具有良好的耐撞性,纵向耐撞性能超过标准BS EN 15227:2020对采用中央钩缓系统的重载机车的要求;横向在承受300 kN载荷碰撞时,车体不产生永久变形。展开更多
基金Project(2016YFB1200505-016)supported by the National Key Research and Development Program of ChinaProject(51675537)supported by the National Natural Science Foundation of ChinaProject(2018zzts161)supported by the Independent Exploration and Innovation Project of Central South University,China。
文摘This paper proposes a novel collision post structure designed to improve the crashworthiness of subway cab cars.The structure provides two innovative features:1)a simpler connection between the post and the car roof,which gives a more reasonable load transfer path to reduce the stress concentration at the joint;and 2)a stiffness induction design that provides an ideal deformation model to protect the safe space of the cab cars.The novel collision post structure was evaluated with finite element analysis,and a prototype cab car was mechanically tested.The results demonstrate that the deformation response was stable and agreed well with the expected ideal mode.The maximum load was 874.17 kN and the responses remained well above the elastic design load of 334 kN as required by the design specification.In addition,there was no significant tearing failure during the whole test process.Therefore,the novel collision post structure proposed has met the requirements specified in new standard to improve the crashworthiness of subway cab cars.Finally,the energy absorption efficiency and light weight design highlights were also summarized and discussed.
文摘可拆卸式司机室可显著提高其内部设备的装配效率及可维修性,但车体耐撞性不足。文章以某型机车为研究对象,对基于可拆卸式司机室的车体结构及其耐撞性进行了研究,并建立有限元模型进行了仿真分析。结果表明:该车体具有良好的耐撞性,纵向耐撞性能超过标准BS EN 15227:2020对采用中央钩缓系统的重载机车的要求;横向在承受300 kN载荷碰撞时,车体不产生永久变形。
