Abstract:In order to investigate the influences of different fluid solid coupling method on hydrodynamic propeller and strength, firstly, the propeller model is established. The model was pretreated using oneway and twoway flow solid coupling (FSI) method in the Workbench platform, to a certain type of propeller in different velocity of open water, surface pressure distribution, stress equivalent calculation and comparative analysis and deformation, to get the open water performance curves, curves of different crosssection pressure distribution curves and stress and deformation changes with the blade radius. The results show that: in the low velocity coefficient, open water performance results of the twoway FSI calculation accuracy is higher than that of unidirectional FSI, with the speed coefficient increases, the gap of two methods of calculating value is getting smaller and smaller; the peak pressure of oneway FSI is higher than the twoway FSI, but the twoway FSI by pressure is more uniform in distribution; unidirectional flow FSI by the stress and deformation peak is higher than the twoway FSI, with the increase of inlet velocity coefficient, two kinds of FSI method to calculate the deviation is increased.