2025_programme: A BEM model for acoustic radiation due to vibrating underwater vehicle in the sea acoustic waveguide
- Day: June 17, Tuesday
Location / Time: C. THALIA at 12:00-12:20
- Last minutes changes: -
- Session: 22. Underwater noise in the EU Marine Strategy Framework Directive: implementation, monitoring, assessment and measures
Organiser(s): Peter Sigray, Aristides Prospathopoulos, Emmanuel Skarsoulis
Chairperson(s): Aristides Prospathopoulos, Emmanuel Skarsoulis
- Lecture: A BEM model for acoustic radiation due to vibrating underwater vehicle in the sea acoustic waveguide
Paper ID: 2100
Author(s): John Prospathopoulos, Kostas Belibassakis
Presenter: John Prospathopoulos
Abstract: The acoustic radiation behavior of a flexible underwater vehicle in finite water depth is numerically investigated. To calculate the acoustic radiation field from vibrating marine structures in the sea acoustic waveguide, representations are developed based on modal expansion of the solution of the Helmholtz equation, in conjunction with the free surface and the seabed boundary conditions. The eigenmodes and eigenfrequencies of the marine structure used in the above representation are calculated by finite element (FEM) solutions. Effects of the free surface and finite water depth are introduced by using a 3D BEM model, based on the ocean waveguide Green’s function obtained by the multiple image-source method. The present model aims to the development and optimization of a computational model for vibro-acoustic calculation associated with the underwater noise radiated from ship and underwater vehicles (URN). Along with measurements, accurate URN modeling will enable the design of quieter vessels, thus contributing to the compliance with the threshold values for continuous noise developed under the European Commission’s Marine Strategy Framework Directive (MSFD).
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- Corresponding author: Dr John Prospathopoulos
Affiliation: National Technical University of Athens
Country: Greece
