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- Title
Calculation of the bistatic target strength of a complex multiresonant shell by the finite element method.
- Authors
Salin, M.; Sokov, E.; Suvorov, A.
- Abstract
A method for calculating the bistatic target strength of a complex elastic structure with characteristic linear dimensions of one to ten wavelengths is developed and tested. The proposed method is based on the finite-element approach to modeling the mechanoacoustic properties of the object under consideration, which is complemented with the algorithms of incident plane wave generation and far-field calculation using the Green function of free space. The results of testing the accuracy of the proposed computational method in application to bodies with a simple shape and a known analytical solution are presented. Specifically, a deviation of less than 3 dB from the theoretical value is obtained for the main lobe of the directional pattern of the target strength. The results of calculations are compared with experimental data obtained for a thinwalled reinforced shell used as an example.
- Subjects
UNDERWATER acoustics; INHOMOGENEOUS materials; ELASTIC structures (Mechanics); FINITE element method; BOUNDARY element methods; GREEN'S functions; DECIBELS
- Publication
Acoustical Physics, 2011, Vol 57, Issue 5, p722
- ISSN
1063-7710
- Publication type
Article
- DOI
10.1134/S1063771011040191