Proceedings of the Korean Society for Noise and Vibration Engineering Conference (한국소음진동공학회:학술대회논문집)
- 2012.10a
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- Pages.258-264
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- 2012
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- 1598-2548(pISSN)
Optimum Welding Position between Shell and Cylinder based on SEA
SEA 를 이용한 쉘과 실린더의 최적 용접 조건
- Published : 2012.10.27
Abstract
The overall aim of this paper is to determine coupling loss factor of welding point between shell and cylinder using loss factor and structural loss factor. For this purpose, two kinds of loss factor were adopted. One is loss factor of each sub structure, another is structural loss factor based on the complex welded or assembled structure. Using these two parameters, it is possible to derive the coupling loss factor which represents characteristic condition of SEA theory. Coupling loss factor of conjunction in complex structure was expressed as power balance equation. The derived equation for a coupling loss factor has been simplified on the assumption of one way (uni-directional) power flow between multi-sub structures. Using these conditions, it is possible to find the equation of coupling loss factor expressed as above two loss factors. To check the effectiveness of above equation, this paper used two-stage application. The first approach was application between simple cylinder and shell. The next was adopted rotary compressor. Rotary compressor has three main conjunctions between shell and internal vibration part. This equation was applied to find out the optimum welding point with respect to reduce the noise propagation. It shows the effective tool to evaluate the coupling loss factor in complex structure.
Keywords
- SEA;
- Structural Loss Factor;
- Loss Factor;
- CLF;
- Rotary Compressor;
- Welding Point;
- Reverberation Time;
- Shell;
- Modal density;
- NAH
- 통계적 에너지 해석법;
- 구조결합손실계수;
- 손실계수;
- 결합손실계수;
- 로터리 압축기;
- 용접점;
- 잔향 시간;
- 쉘;
- 모드밀도;
- 근접 음향 홀로그래피;