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以某类型汽车为研究对象,建立了正面40%偏置碰撞的有限元模型,基于欧洲正面碰撞法规ECE R94.01《关于车辆正面碰撞乘员保护认证的统一规定》,应用PAM-CRASH有限元软件进行仿真;通过对仿真结果的分析并针对原车耐撞性能的不足,在车架纵梁前部设计导引槽式吸能结构,以改进前纵梁吸能变形模式;增加A柱加强件及乘员舱区域车架纵梁的宽度和高度,以提高车架纵向刚度和乘员舱的强度。结果表明:以上改进使整车耐撞性能得到了显著改善;改进后乘员舱变形量明显减小,车架第4横梁的加速度峰值降低了7g。
Taking a certain type of vehicle as the research object, a finite element model of frontal 40% offset collision was established. Based on the European ECE R94.01 “Uniform Provisions on Passenger Protection Certification of Vehicle Frontal Crash”, the finite element software PAM-CRASH According to the analysis of the simulation results and the lack of the crashworthiness of the original car, a guide slot type energy absorbing structure is designed on the front of the frame longitudinal beam to improve the energy absorption deformation mode of the front side beam. And the width and height of the frame longitudinal beam in the passenger compartment to increase the longitudinal rigidity of the frame and the strength of the passenger compartment. The results show that the above improvements have greatly improved the crashworthiness of the vehicle; the deformation of the passenger compartment has been significantly reduced and the peak acceleration of the fourth beam of the vehicle frame has been reduced by 7g.