Abstract
The present paper deals with the problems of the steady-state radiated acoustic field generated by vibrating plates with narrow slits in an infinite fluid medium, and analytically and experimentaly investigates the effects of slit geometry on the characteristics of the acoustic field. The numerical analysis based on the Boundary Element Method, which can be applied to the Helmholtz integral equation, has been used to predict the acoustic radiation. The nodal displacements of the slit plates in the vibration problems calculated by the Finite Element Method have been transformed to the vibration velocity, which is utilized as boundary conditions in the B. E. analysis. Comparison with experimental results indicate that the numerical schemes employed are effective in correctly predicting the characteristics of acoustic radiation from vibrating arbitrarily shaped surfaces with slits.
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