关键词: 燃油箱；Abaqus；随机振动；阻尼

Abstract: Random vibration fatigue failure is one of the main failure modes of automobile parts, traditional design experience has some disadvantages, such as uncertain optimization direction, which leads to over design of products. In this paper, taking the fuel tank as the research object, Abaqus software is used to get simulation acceleration frequency response peak value based on the sweep frequency method and compare this value with test to determine the value of damping parameters, then the random vibration of the fuel tank is simulated using this value to obtain the Rmises stress of straps, we can evaluation of failure risk based on this. According to the vibration mode at the peak frequency response, the strap structure is optimized. Finally, the random vibration of the fuel tank is verified. The results show that the optimized strap structure has high strength and no fatigue fracture. The research results provide the optimization direction for product design, reduce the development cost and shorten the development lifecycle.

Key words: Fuel tank; Abaqus; Random vibration; Damping