The airframe of high performance fighter requires light weight, long life, multi-function, and high g capacity. To achieve this goal, in addition to the contribution of materials and manufacturing technology (new materials, new processes, and new structures), structural strength design, analysis, and verification technology of design institute must also be improved to meet the requirements. Focusing on the requirements of structural integrity, this paper describes the research results, technical development, and design practice of the strength team in recent years. It mainly includes the specification architecture for strength design and verification of high performance fighter, structural load screening technology based on multi-dimensional envelope, internal loads analysis technology based on unified FEM model, composite integrated structure analysis technology, detail stress analysis technology with high precision and efficiency, pre-tightening principle and strength design of embedded weapon bay door, rapid modeling, and acoustic fatigue analysis method of curved stiffened panel, prognostic and health management system design. The above research results have been successfully applied to the development of a new generation of high performance fighter airframe.
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