Structural Strength Evaluation of a Planing Hull Based on a One-way Coupled CFD-FEA

This study employs a one-way coupling method based on CFD and FEA to evaluate and compare the structural strength of a planing hull under calm water and wave navigation conditions. A high-speed planing hull is selected as the research object. The wave loads under different navigation states are computed using the CFD method, and the pressure distribution on the hull bottom is mapped to a finite element model for structural strength analysis. The study investigates the variations in hull bottom pressure and structural stress under three navigation states: displacement, semi-planing, and planing. Additionally, the stress characteristics under wave conditions, including hogging and sagging states, are simulated and evaluated. By comparing the results with those obtained from the conventional empirical formula method, the accuracy and advantages of CFD in wave load calculations are validated, and the localized stress concentration areas under calm planing conditions are identified. The results demonstrate that this method not only enhances the precision of wave load calculations but also provides an effective approach for structural strength evaluation in planing hull design, thereby improving the technical and economic performance of planing hulls.