개인구독
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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 purpose of this study is to develope the prediction models combining both machine and friction noise of running vehicles. The noise were measured at the distance of 7.5 M, 11.0M, and 14.5M from noise source with test vehicles running at the speed of 40 ㎞/h, 60 ㎞/hand 80 ㎞/h while normal traffic were detoured.
Total noise levels were measured while vehicles were running at given speeds. Engine noise level was considered as the noise of its idle running at the three vehicle speeds shown above. Friction noise level was ascertained by moving the vehicle at given speeds without the engine operating. Prediction models for total noise level were developed by two different methods. First, prediction for total noise level was directly attempted. Secondly, total noise level was a combination of engine noise and friction noise.
As a result of this paper, the reduction of total vehicle noise by increasing the distance to the noise source from 10M to 15M is as much as that by dropping its speed from 60 ㎞/h to 40 ㎞/h. Machine noise is the main noise of the large vehicles while friction noise is that of the small vehicles. Machine noise for large vehicles, and friction noise for small vehicles should be tightly controlled to reduce the vehicle noise. A low noise engine and tire, and the shape of vehicle body are needed to be developed to reduced noise furthur.
Total noise levels were measured while vehicles were running at given speeds. Engine noise level was considered as the noise of its idle running at the three vehicle speeds shown above. Friction noise level was ascertained by moving the vehicle at given speeds without the engine operating. Prediction models for total noise level were developed by two different methods. First, prediction for total noise level was directly attempted. Secondly, total noise level was a combination of engine noise and friction noise.
As a result of this paper, the reduction of total vehicle noise by increasing the distance to the noise source from 10M to 15M is as much as that by dropping its speed from 60 ㎞/h to 40 ㎞/h. Machine noise is the main noise of the large vehicles while friction noise is that of the small vehicles. Machine noise for large vehicles, and friction noise for small vehicles should be tightly controlled to reduce the vehicle noise. A low noise engine and tire, and the shape of vehicle body are needed to be developed to reduced noise furthur.
목차
ABSTRACT
Ⅰ. 서론
Ⅱ. 자동차소음이론
Ⅲ. 이용자료
Ⅳ. 모델의 개발
Ⅴ. 결론
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