Simulation and Analysis of External Radiated Sound Field of Underwater Structure

The simulation of external sound field is one of the key problems in the radiated noise calculation of underwater structure. The influence of external acoustic environmental factors, such as limited water depth and free surface, is also lack of enough research at present. Firstly, the calculation method of underwater radiated noise is verified by a stiffened cylindrical shell, and then the area size, shape and element size of the external sound field is discussed. Finally, the effect of finite water depth and free surface on the radiated sound field is analyzed. The results can provide a reference for the calculation of radiated noise of underwater structure.