公开(公告)号：US20240077608A1

公开(公告)日：2024-03-07

申请号：US18383150

申请日：2023-10-24

Applicant: Harbin Engineering University

Inventor： Haichao LI ,  Jiawei XU ,  Fuzhen PANG ,  Cong GAO ,  Yuhang TANG ,  Jiajun ZHENG ,  Xueren WANG ,  Zhe ZHAO ,  Xuhong MIAO ,  Yuan DU

IPC: G01S15/00 ,  G06F30/20

CPC classification number: G01S15/006 ,  G06F30/20

Abstract: Disclosed are a method and system for evaluating sonar self-noise at a ship design stage. The method includes: building a ship structure full-scale geometric simulation model; acquiring loss factors and sonar transducer space outfitting acoustic absorption coefficient material parameters; acquiring mechanical excitation, hydrodynamic excitation, and propeller excitation; inputting the loss factors and the sonar transducer space outfitting acoustic absorption coefficient material parameters into an established statistical energy evaluation model, and applying a mechanical excitation to a face plate of foundation of the built ship structure full-scale geometric simulation model, applying a hydrodynamic excitation to the surface of a ship hull, and applying a propeller excitation to a stern shaft to perform calculation of sonar self-noise of a ship to obtain total spectral density level of the sonar self-noise; and evaluating spectral density level calculation results by index requirements. The method is applicable in risk evaluation of sonar self-noise indexes.