The Effect Of Parameters On Vibration And Noise Of Propeller Under Vortex Discharge Condition

The development of modern shipbuilding industry puts forward higher requirements for the vibration and noise reduction technology of propellers,especially in the military field.Due to the complexity of the conditions,many research ideas and methods have not been involved in the problem of vibration and noise of propellers under vortex shedding conditions.Based on the theory of lift surface and the method of acoustic-solid coupling,the analog computation of the vortex-induced vibration response and flow field sound pressure of the blade is carried out.The parameters of the propeller such as lateral slope,pitch and pitch are analyzed.The influence of sound pressure provides a certain reference for the design and manufacture of low-noise propellers.The main work completed is as follows:Select the propeller parameters.Based on the similarity theory of the propeller and the theory of the lifting surface,the hydrodynamic performance of the selected propellers is calculated and the results are compared and analyzed.Based on the method of acoustic-solid coupling,the dry and wet modes of each type of paddle were calculated by ABAQUS software,including single-blade structure and full-blade structure,and the results were analyzed and compared.The two-dimensional numerical analysis of the profile of the propeller is carried out by the discrete vortex method,and the pressure of the surface of the propeller is obtained under the condition of vortex shedding conditions.This load is applied to the surface of the threedimensional propeller.The ABAQUS software is used to calculate and analyze the single-blade model in the basin,and to explore the influence of parameter variation on the vibration response of the propeller and the sound pressure of the flow field.