Abstract: Glass-fiber Reinforced Composite(GRC) has the excellent quality of light weight and high strength, which is especially suitable for the construction of small ships with high speed such as high-speed yachts. However, the research on the ship strength analysis of GRC is relatively less, and the relevant specifications are not enough. Firstly, the modeling method of GRC with sandwich structure is presented. Then, taking a GRP catamaran as an example, based on the direct strength calculation theory of finite element method and referring to the relevant requirements of CCS, the direct strength calculation method of GRP catamaran is given. The results show that the GRC simulation method can effectively simulate the structural form of the catamaran, and the structural strength meets the requirements of the code, and the transverse bending condition is prone to structural failure. The conclusions drawn in this paper have reference significance for the development and design of GRP ship with sandwich structure.

Key words: GRP ship, composite material, direct calculation, finite element method