Abstract: The door handle is an important functional and safety part of the automobile. In order to meet the structural compactness requirements and light weight of the door handle, the layout design is carried out for the peripheral and opening height of the exterior handle, and the main parameters such as the matching clearance and opening height of the peripheral of the exterior handle are designed. According to the process of force transfer, the stress analysis of key parts is carried out, and the opening force of the handle directly acting on the car door is calculated. Using the virtual simulation software ANSYS to carry out the simulation analysis and secondary optimization design of the exterior handle structure, and get the optimization results. On the premise of not changing the structural rigidity, hardness and the practicability of the door handle, the maximum stress concentration point is transferred backward by the contact point of the handle hook which is easy to cause fracture and deformation, and the mass is reduced by 20%～30% at the same time, so as to effectively reduce the manufacturing cost of the door handle under the condition of ensuring safety. It will play a reference role in the research of the structural optimization and engineering application of the door handle of the automobile.

Key words: Automobile door handle; Opening force; Structure optimization

摘要： 车门把手是汽车上重要的功能件与安全件，为了满足汽车门把手的经构紧凑性及轻量化要 求，对外把手周边及开启高度进行布置设计，对外把手周边匹配间隙、开启高度等主要参数进行 设计。根据力的传递过程对关键零件进行受力分析，计算其用户直接作用在汽车门外把手的开启 力。论文运用虚拟仿真软件 ANSYS 对门外把手部分结构进行仿真分析及二次优化设计，并得出优 化结果。在不改变结构刚度、硬度以及门把手实用性的前提下，最大应力集中点由容易造成断裂 变形的手柄挂钩接触点向后转移，同时质量减少 20%～30%，保证安全性的条件下有效降低汽车 门外把手的制造成本，对研究汽车门外把手的结构优化及工程应用起参考作用。

关键词: 汽车门把手；开启力；结构优化