선박 격실 mock-up을 이용한 뜬바닥구조의 소음·진동 저감효과 계측에 관한 연구
A Study on Noise and Vibration Reduction Measurements of a Floating Floor Structure by means of a Ship Cabin Mock-up
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In this paper, noise and vibration reduction for floating-floored ship cabin is studied. A mock-up is built by using 6 mm steel plate, and two identical cabins are made for simulation of ship cabins. When a speaker is used as a sound and vibration sources, it is shown that floating floor is more effective in isolating sound than bare deck by 2-5 dB. It is also shown that structure-borne noise of the bare deck is greater than that of floating-floored deck by 3-10 dB. For tapping machine excitation, it is found that the effect of floating floor in airborne noise and structure-borne noise reduction reaches up to 40-50 dB for high frequency ranges.
Abstract
In this paper, noise and vibration reduction for floating-floored ship cabin is studied. A mock-up is built by using 6 mm steel plate, and two identical cabins are made for simulation of ship cabins. When a speaker is used as a sound and vibration sources, it is shown that floating floor is more effective in isolating sound than bare deck by 2-5 dB. It is also shown that structure-borne noise of the bare deck is greater than that of floating-floored deck by 3-10 dB. For tapping machine excitation, it is found that the effect of floating floor in airborne noise and structure-borne noise reduction reaches up to 40-50 dB for high frequency ranges.
참고문헌 (10)
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- Joo, W.H, "Quantitative Evaluation of Airborne Sound Insulation in Ship's Accommodation using Large Scale Noise Test Facilities", Noise Control Engineering Journal, 56(1), pp.45~51 (2008)
- Kernen, U.E, "Airborne Sound Insulation of Floating Floor", Acta Acoustica, 87, pp.215~225 (2001)
- 김현실, "뜬바닥구조를 이용한 선실 바닥충격음 저감에 관한 연구", 대한조선학회 논문집, 41(5), pp.41~47 (2004), 대한조선학회
- Kim, H.S, "Floor Impact Noise Reduction in Ship Cabin by Using Floating Floor, Internoise2005, CD-Rom", ~ (2005)
- Naval Architect, "Acoustic Properties of Cruise-Ship Accommodation", Issue January, pp.17~20 (2001)
- Schiavi, A, "Acoustical Performance Characterization of Resilient Materials used under Floating Floors in Dwellings", Acta Acoustica united with Acoustica, 93, pp.477~485 (2007)
- Tadeu, A, "Prediction of Airborne Sound and Impact Sound Insulation provided by Single and Multilayer Systems using Analytical Expressions", Applied Acoustics, 68, pp.17~42 (2007)
- Thomson, W.T, "Theory of Vibration with Application" (1972), Prentice-Hall inc.
- Warnock, A.C.C, "Sound Transmission through Floor", Ceiling Assemblies, 1998, pp.26, 17~18