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자료유형
학술저널
저자정보
저널정보
대한기계학회 Journal of Mechanical Science and Technology Journal of Mechanical Science and Technology Vol.21 No.12
발행연도
2007.12
수록면
2,073 - 2,081 (9page)

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초록· 키워드

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This paper suggests a practical method, based on multi-domain BEM, to calculate the transmission loss of 3-dimensional silencers of subdomains comprised of different geometric and material characteristics with looped and/or cascaded connections. We previously proposed an efficient method to compute the transmission loss for 3-dimensional silencers using multi-domain BEM but its application is much difficult to those having looped subdomains [1]. Here, we adopt a method summing the impedance matrices of the subdomains with various types of connection represented by system graph. The algebraic overall condensed acoustic equations having only particle velocities on the subdomain interface boundaries as unknowns are formulated. A splitter silencer of cascaded, looped and symmetric connections as a sample problem is dealt with for the explanation and verification of the proposed method. An experimental work with the splitter silencer is performed to back up the suggested method.

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Abstract
1. Introduction
2. Impedance matrix computation with multi-domain BEM
3. Transmission loss of the splitter silencer
4. Experiments and discussion
5. Conclusion
Acknowledgement
References
Appendix: Intermediate calculation process for the four pole parameters

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