Author(s)

Xiaowen Li, Zhaoyi Zhu, Yan Li and Yan Fei

Corresponding Author

Zhaoyi Zhu

ABSTRACT

The composite stiffened panels, as the main components of lightweight ships, its design rationality has an influence on safety and economy of ships. Based on response surface methodology and numerical analysis, the structural optimization design of a typical composite stiffened panel was carried out, taking structural stability into account. Through statistical calculations, eigenvalue buckling analysis and response surface optimization design, the anti-buckling capability and weight of composite stiffened panels were obtained. With the minimum weight as the objective function and factoring in requirements for the critical buckling value and the dimension parameters, the optimal design scheme of the composite stiffened panel was acquired by the multi-parameter optimization. The results show that the thickness of the plate and cap beams is very sensitive to the weight and buckling capacity of the stiffened panel. The optimized structure resulted in a weight reduction of 12% and a critical buckling load increase of 23%. This optimization method has practical value and can provide a reference for the design optimization and practical application of composite ships.

KEYWORDS

Composite, stiffened panel, optimized design, stability, response surface methodology