According to the structural characteristics and mechanical characteristics of the main bearing beam of a certain type of helicopter

a full composite material main bearing beam structure has been developed. Feasibility analysis was carried out by theoretical calculation

the FEM analysis model of pipe beam was established by MSC.Patran/Nastran and the static strength analysis was carried out according to actual load and restraint condition. The results of structural strain and displacement were obtained and the strength test scheme was also designed. The static strength test of the pipe beam structure was carried out and the result shows that

the main bearing beam structure of composite material meets the requirement of strength design. Compared with the original metal material

the tubular composite material reduced the weight by 17.6%

which fully reflects the overall performance of tubular composite material has better bearing capacity and application

promotes the analysis and practical application of tubular composite material.