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- W2023853362 abstract "In this paper, a finite circular cylindrical shell filled with fluid and subjected to multiple excitations (mechanical and acoustical) is studied. The exact solution for vibration is based on the Donnell thin shell theory and the frequency equation of the coupled vibration problem is obtained by taking account of the effect of the inner fluid. In the direct problem, displacements are obtained by the modal method when the cylinder is assumed to be simply supported. The proposed predicting method is based on finite difference principle which makes it possible to express the derivatives of the equation of motion in term of displacements in order to calculate the distribution resulting from excitations. Simulations show that there exists a condition under which deformations can be neglected but it is found that this assumption would cause error in the results when exciting the cylinder below the ring frequency. In order to evaluate the effect of the fluid, some results of the cylindrical shell filled with fluid are compared with those of the shell in vacuo. Other numerical results are finally presented using exact and inexact displacements and a regularisation procedure based on the filtering of the wavenumber domain is used to minimise the effect of errors. This technique gives good results and makes the problem stable when the displacements are contaminated by noise resulting from measurement." @default.
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- W2023853362 date "2008-11-01" @default.
- W2023853362 modified "2023-09-25" @default.
- W2023853362 title "Prediction of multiple sources exciting a cylinder filled by a heavy fluid using an inverse method" @default.
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- W2023853362 doi "https://doi.org/10.1088/1742-6596/135/1/012037" @default.
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