论文部分内容阅读
为了改善大客车框架的耐撞性,改进了车身前框架结构,建立了仿真的有限元汽车模型,进行了数值仿真实验。针对国内在产的某型号客车,参照欧洲经济委员会ECE-R29法规的摆锤撞击试验,利用软件LS-DYNA计算了客车框架在前碰撞中的位移和加速度。对客车骨架不同材料和厚度进行正交实验,优化车身结构耐撞性能。结果表明:采用改进方案,客车骨架薄壁结构吸收并分散了摆锤的碰撞动能,限制了车身碰撞加速度;用较少的实验,获得较好的吸能效率。
In order to improve the crashworthiness of the bus frame, the front frame structure of the vehicle body is improved, the finite element model of the automobile is established, and the numerical simulation experiment is carried out. According to the pendulum impact test of the ECE-R29 Law of the European Economic Commission (ECE-R29) and the LS-DYNA software, the displacement and acceleration of the bus frame in the frontal collision are calculated. Orthogonal experiments of different materials and thickness of the bus skeleton to optimize the crashworthiness of the body structure. The results show that the passenger car skeleton thin-walled structure absorbs and disperses the impact kinetic energy of the pendulum, which limits the acceleration of the vehicle body collision. With fewer experiments, better energy absorption efficiency is obtained.