지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록· 키워드
오류제보하기
The nature and the sources of sound in cars is discussed in the light of many previous works, and the importance of the system resonances inside cars is suggested.
An investigation of a 'boom' problem in a small size passenger car is discribed. It was established that the 'boom' frequencies coincided with engine firing frequency and also with several system resonances. To find out main transmission path of the noise to the car interior, various possible sources were eliminated from the investigation by means of simple modification to the vehicle.
Data on the structural modes of the body, and the acoustic modes of the passenger compartment at various forcing cases were obtained to provide better understanding of the problem. It was found that the acoustic resonance responsible for the boom was controlled largely the bending motion of the floor.
To investigate the effect of the structural modification to the acoustic response, center floor of the car was reinforced. A great reduction of the noise inside the car especially at the offending speed range, was achieved by this modification.
An investigation of a 'boom' problem in a small size passenger car is discribed. It was established that the 'boom' frequencies coincided with engine firing frequency and also with several system resonances. To find out main transmission path of the noise to the car interior, various possible sources were eliminated from the investigation by means of simple modification to the vehicle.
Data on the structural modes of the body, and the acoustic modes of the passenger compartment at various forcing cases were obtained to provide better understanding of the problem. It was found that the acoustic resonance responsible for the boom was controlled largely the bending motion of the floor.
To investigate the effect of the structural modification to the acoustic response, center floor of the car was reinforced. A great reduction of the noise inside the car especially at the offending speed range, was achieved by this modification.
목차
Summary
1.緖論
2.實驗의 方法
3.騷音의 特性과 傳達系統
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[解說] 車室 內部騷音의 特性과 低減에 關한 實驗的 考察(下)
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