Fast Prediction of Acoustic Radiation from a Hemi-capped Cylindrical Shell in Waveguide

• 作 者: Hongyang Chen Qi Li Dejiang Sh
• 机 构: National Key Laboratory on Ship Vibration&Noise,Underwater Acoustic Science and Technology Laborator
• 出 处: 船舶与海洋工程学报（英文版）
• 发表日期: 2004年期
• 关键词: acoustic radiation hemi-capped cylindrical shell fast prediction half-space wave
• 基金项目: Foundation item:Supported by the National Natural Science Foundation of China;the Young Scientists Fund of the National Natural Science Foundation of China

In order to predict acoustic radiation from a structure in waveguide, a method based on wave superposition is proposed, in which the free-space Green’s function is used to match the strength of equivalent sources. In addition, in order to neglect the effect of sound reflection from boundaries, necessary treatment is conducted, which makes the method more efficient. Moreover, this method is combined with the sound propagation algorithms to predict the sound radiated from a cylindrical shell in waveguide. Numerical simulations show the effect of how reflections can be neglected if the distance between the structure and the boundary exceeds the maximum linear dimension of the structure. It also shows that the reflection from the bottom of the waveguide can be approximated by plane wave conditionally. The proposed method is more robust and efficient in computation, which can be used to predict the acoustic radiation in waveguide.