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주원호;임종욱;김동해
- Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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- 2003.05a
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- pp.709-712
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- 2003
Recently, high noise problem was experienced during the development of 2-pole squirrel cage motor for industrial compressor. In order to firstly identify the noise characteristics, a variety of measurements were carried out. It was found out that high noise was dominated by linear and nonlinear slot noise components. For the development of low noise indusrial motor, the air gap between rotor and stator in the motor was firstly enlarged. Secondly, it was also modified for the cooling housing to have high absorption features. Consequencely, low noise 2-pole motor having the noise level of less 80㏈(A) was developed. In this paper, a series of noise identification and control process for this motor are introduced.
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최한규;신형일;양보석;이유원;김광홍
- Journal of the Korean Society of Fisheries and Ocean Technology
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- v.39 no.2
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- pp.134-142
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- 2003
Most of the vibration and noise generating in small boats come from shipboard machinery such as main engine, generator and auxiliary machinery etc. In order to build up the comfortable environment for the crew and to reduce the ambient noise, and provide basic materials for reasoning selection application, the design under allowable vibration & noise conditions and the examination of vibration condition of the new ships, this paper researches the frequency spectrum and order analysis of vibration and noise. The obtained results are summarized as follows : Through comparing the small boat internal noise with the regulation of IMO and DNV, it revealed that the noise level of main engine room accords with the standard, and the noise of other places are beyond the values. In this paper, two boats are analyzed, which are same type, same size and power, but the main engines noise of them is different. In order to search the noise source, the noise of main engine room and relative parts are measured. The third order of measured points is dominant in frequency domain by the order analysis.
https://doi.org/10.3796/KSFT.2003.39.2.134 인용 PDF KSCI

유진형;김남응;주관정
- Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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- 1994.10a
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- pp.205-209
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- 1994
본 연구에서는 오디오용 데크의 음질특성과 벨트구동계의 회전진동 특성과의 연관성을 규명하고자 한다. 이를 위해 벨트구동계를 다자유도 진동계로 모델링하여 회전진동 특성을 규명하고 실험으로 확인하였다. 이의 결과를 실제 데크에 응용하기 위해 각 파라미터의 변화에 따른 특성변화의 경향을 살펴보았으며, 당사에서 개발중인 신모델에서 회전비의 적절한 설계를 제안하여 우수한 음질특성을 확인하였다.
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