| 摘要(英) |
Noise is all around us. We are disturbed by these unpleasant sound all the time. However, most of the time people prefer to stay in a quieter environment. If people stay in enclosed space, we can keep the noise down by the aid of the boundaries which is made by elastic material, and furthermore set a damper on it to enhance the efficiency. The coupling and the interaction between fluid and structure can be simulated by a mathematical model called the acoustic structure interaction problem. It can be transform into a equivalent quadratic eigenvalue problem by applying the Galerkin finite element method. Eigenvalues reflects the behavior of the couple system, among these eigenvalue, we are interested in finding the low frequency eigenvalues which are concerned in the field of industrial and science. By the numerical simulation, the choices of material and the position of damper can be adjusted according to different situations or requirements. |
| 參考文獻 |
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