Fluid-structure interaction calculation method for composite propeller based on BEM/FEM

Method Combined with the boundary element method (BEM) and finite element method (FEM), the fluid-structure interaction calculation method of composite propeller was established, the surface pressure and hydrodynamic force of the composite propeller blade were calculated by the boundary element method, and the calculated surface pressure of the propeller was transferred to the finite element structure model, and then the displacement and stress distribution of the composite propeller under load were predicted by the finite element method, and the deformation was transferred to the hydraulic force calculation of the propeller boundary element method, so as to realize the two-way fluid-structure interaction calculation. The feasibility of the method was verified by using this method to calculate the 5471 propeller and compare it with the experimental values in the literature, and then the hydrodynamic performance of the 5471 propeller composite propeller and the rigid propeller was compared and analyzed. The results show that the method in this paper can realize the integration of hydrodynamic performance analysis of composite propellers, which has the advantages of simple implementation, high calculation efficiency and accuracy.

Conclusion The research can provide reliable data support for the adaptive design of composite propellers and improve the design efficiency of composite propellers.