APPLICATION OF COUPLED FEM/BEM ON THE ANALYSIS OF UNDERWATER RADIATED NOISE OF A SURFACE SHIP INDUCED BY HULL VIBRATIONS

Authors

Hua-Tung Wu, Department of Engineering Science and Ocean Engineering, National Taiwan University, Taipei, Taiwan, R.O.C. Ship and Ocean Industries R&D Center, New Taipei City, Taiwan, R.O.C.Follow
Pei-Tai Chen, Department of Systems Engineering and Naval Architecture, National Taiwan Ocean University, Keelung, Taiwan, R.O.C.

Abstract

This paper presents a coupled FEM/BEM for solving fluid/structure interactions under mono-frequency external loadings. The elastic structure is modeled by finite element method, and the acoustic loading is represented by boundary element method. Firstly, a semi-submerged thin shell sphere is selected as a numerical example. The numerical results are compared with the analytical solutions to verify the present method. And then, an existing vessel is selected to compute the responses of wetted surface acoustic pressures and normal velocities and, consequently, radiated underwater noise caused by the vibrating of hull structure. The results are also compared with measured data under the ship sea-trial and good correlations are obtained.

Recommended Citation

Wu, Hua-Tung and Chen, Pei-Tai (2017) "APPLICATION OF COUPLED FEM/BEM ON THE ANALYSIS OF UNDERWATER RADIATED NOISE OF A SURFACE SHIP INDUCED BY HULL VIBRATIONS," Journal of Marine Science and Technology: Vol. 25: Iss. 2, Article 8.
DOI: 10.6119/JMST-016-1118-2
Available at: https://jmstt.ntou.edu.tw/journal/vol25/iss2/8