关键词: 燃油箱；结构强度；有限元分析；试验研究

Abstract: For the fuel tank of the passenger car, an important safety component, a finite element analysis considering fluid-structure interaction is conducted in its early design stage, and it is found that there is strain exceeding phenomenon in the front and rear drops. Structural improvements are made to its risk areas, and strength simulations show that the maximum equivalent plastic strain values decreased by 44.7% and 33.3% respectively compared to before the improvement. The drop test shows that there is no leakage and rupture, which meets the design requirements. The simulation and testing based on finite element analysis provide a scientific basis for the development of fuel tanks, which can effectively improve product development efficiency and reduce test costs.

Key words: Fuel tank; Strength of structure; Finite element analysis; Experimental study