Numerical Optimization of Sound Absorption Systems with Constrained Single-Layer Absorber

The thickness and the attached area of the sound absorber are confined in the practical engineering design while the sound absorber is applied inside the machine room to eliminate the reverberant sound energy. The optimization of the shape of the absorber and the quantification of the exact area of the absorber (in order to meet the required value of sound pressure level (SPL) at the concerned receiving point) becomes essential. For purposes stated above, tow powerful gradient techniques with a logical control algorithm are applied during the optimization of the sound absorption system. Both the optimization of shape and the selection of absorbing material are considered. In addition, the specified area of the absorber will depend on the target noise level of the SPL at every optimization. A numerical case of sound absorbing system is exemplified in the study. The simulated result shows that the optimized SPL at receiver can meet the prerequisite of targeted noise value. The optimal design of sound absorption system proposed in this study provides a quick and economical approach.

並列關鍵字

constrained single-layer absorber ； transfer matrix method ； sound absorption system ； exterior penalty function method ； interior penalty function method

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