서지주요정보
차량의 가속주행 소음 예측 및 소음원 기여도 파악에 관한 연구 = A study on the identification of noise sources and the prediction of pass-by noise of accelerating vehicles
서명 / 저자 차량의 가속주행 소음 예측 및 소음원 기여도 파악에 관한 연구 = A study on the identification of noise sources and the prediction of pass-by noise of accelerating vehicles / 류정수.
저자명 류정수 ; Ryu, Jeong-Suh
발행사항 [대전 : 한국과학기술원, 1997].
Online Access 원문보기 원문인쇄

소장정보

등록번호

8007615

소장위치/청구기호

학술문화관(문화관) 보존서고

MME 97035

SMS전송

도서상태

이용가능

대출가능

반납예정일

초록정보

In accordance with the international trend towards more stringent vehicle noise regulations, it becomes increasingly important to predict the exterior noise level of the vehicle at the early stage of development. In this study, the pass-by noise of the accelerating vehicle is estimated by using the sound wave propagation theory above a ground surface of pass-by test site, in which the acoustic characteristics of noise sources measured in semi-anechoic chamber equipped with chassis dynamometer. The principal noise sources of the vehicle are classified into engine, tire-road interaction and exhaust discharge noises. Near field acoustic pattern of these noise sources are measured at several engine speeds within the range of problem engine speed detected from pass-by tests. Characteristic impedance of asphalt surfaces is employed in the wave propagation theory above a ground surface and it is measured indirectly in the actual field. Individual acoustic characteristics of noise sources are synthesized at the microphone position, that one can get the simulated overall pass-by noise distribution as a function of distance or one can rank the contributing noise sources in the problem rpm range. As a result, it is showed that the predicted pass-by noise level is overestimated but within 3 dB, however the overall trend is very similar to the measured one. In this manner, the noise control engineer can plan the countermeasure plans very efficiently from the information of the major contributor, and the refined overall sound level can be predicted. If further studies on the source characteristics including more precise directivity of the sources are pursued, the accuracy of the pass-by noise prediction would be improved considerably.

서지기타정보

서지기타정보
청구기호 {MME 97035
형태사항 x, 82 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Jeong-Suh Ryu
지도교수의 한글표기 : 이정권
지도교수의 영문표기 : Jeong-Guon Ih
학위논문 학위논문(석사) - 한국과학기술원 : 기계공학과,
서지주기 참고문헌 : p. 80-82
주제 소음원 규명
가속주행소음
Identification of noise sources
Pass-by noise
Accelerating vehicle
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