Method and system for evaluating sonar self-noise at ship design stage

US11940528B1 · kind B1 · utility

Assignee

• Harbin Engineering University · CN

Inventors

• Haichao Li · Yantai, CN
• Jiawei Xu · Nanhu, CN
• Fuzhen Pang · Jingwei, CN
• Cong Gao · Jingwei, CN
• Yuhang Tang · Foshan, CN
• Jiajun Zheng · Jingwei, CN
• Xueren Wang · Jingwei, CN
• Zhe Zhao · Los Angeles, US
• Xuhong Miao · Jingwei, CN
• Yuan Du · Los Angeles, US

Key dates

• Filing date: Oct 24, 2023
• Grant date: Mar 26, 2024
• Expiry date: Oct 24, 2043

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T90/00
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

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.