한국자동차공학회논문집 (Transactions of the Korean Society of Automotive Engineers)
- 제9권2호
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- Pages.168-175
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- 2001
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- 1225-6382(pISSN)
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- 2234-0149(eISSN)
진동 동력 흐름 예측 기법을 이용한 소음 전달 경로 해석 및 차량의 실내소음저감에 관한 연구
A Study on Noise Transfer Path Analysi for Sound Improvement of Vehicle Using the Vibrational Power Flow
초록
Reduction of structure-borne noise of the compartment in a car is an important task in automotive engineering. Transfer path analysis using vibroacoustic reciprocity technique or multiple path decomposition method has generally been used for structure-borne noise path analysis. These methods are useful in solving particular problem but do net quantify the effectiveness of vibration isolation of each isolator of a vehicle. To quantify the effectiveness of vibration isolation, the vibrational power flow has been used for a simple isolation system or a laboratory based isolation system. It is often difficult to apply the vibrational power flow technique to the complex isolation system like a car. In this paper, a simple equation is derived for calculation of the vibrational power flow of an isolation system with multiple isolators such as a car. It is successfully applied to not only quantifying the relative contributions of eighteen isolators but also reducing structure-borne noise of a passenger car. According to the results, the main contributor of eighteen isolators is the rear roll mount of an engine. The reduced structure-borne noise level is about 5dBA.
키워드