关键词: 双腔铝合金燃油箱；CAE 分析；装配评估；台架振动试验；设计优化

Abstract: In order to reduce the crack failure risk of the split diaphragm of the dual-cavity aluminum alloy fuel tank, this paper introduces a method to improve the quality of the dual-cavity aluminum alloy fuel tank by improving the structure of the split diaphragm. First of all, combined with the computer aided engineering (CAE) analysis and test report of the same structure, the structure of the split diaphragm is improved. The article then evaluates the assembly of the fuel tank assembly by modeling with CATIA software, and analyzes the process forming of the new structure split diaphragm. Finally, the prototype is trial-produced and verified by the bench vibration test. The research results show that this method can effectively overcome the problem of split diaphragm cracking and falling off of double-chamber oil tank, and greatly reduce the time cost, labor cost and raw material cost in the process of design optimization.

Key words: Dual-cavity aluminum alloy fuel tank; CAE analysis; Assembly evaluation; Bench vibration test; Design optimization