关键词: 汽车门把手；开启力；结构优化

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