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김병삼(B.S.Kim),이태근(T.K.Lee),홍동포(D.P.Hong),양성모(S.M.Yang),정태진(T.J.Chung) 한국자동차공학회 1992 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
The vibration characteristics of radial tire in affecting vehicle ride quality and road noise is studied. Modal parameters under inflation pre-ssure are determined experimentally by using of transfer function method. The natural frequencies and damping factors of radial tire are very impor-tant in vehicle ride and road noise. In this paper, natural frequencies and damping factor is determined by analysis of experimental data using 2-Channel FFT Analyzer.<br/>
김병삼(B.S.Kim),이태근(T.K.Lee),홍동표(D.P.Hong),양성모(S.M.Yang),정태진(T.J.Chung) 한국자동차공학회 1993 오토저널 Vol.15 No.2
The vibration characteristics of radial tire are studied. In order to obtain theoretical natural frequency and mode shape, the plane vibration of a tire is modeled to that of circular beam. By using the Tielking method based on Hamilton's principle, theoretical results are determined by considering tension force due to tire inflation pressure, rotational velocity and tangential, radial stiffness. Modal parameters varying the inflation pressure are determined experimentally by using the transfer function method. Results show that material property and wear are parameter for shifting of natural frequency and damping.
김병삼(Kim, B.S.),김용우(Kim, Yong-woo) 한국소음진동공학회 2005 한국소음진동공학회 논문집 Vol.15 No.9
Silencers are engineering devices that are designed to attenuate sound waves propagating in a flowing medium. The muffler type silencer has a series of chambers in parallel or series utilizing the reflection and expansion characteristics of the expansion chambers, sidetubes, branch resonators, and tailpipes to attenuate the sound. To Improve the performance of industrial blower silencer of muffler type which is employed in petrochemical plant, this paper seeks its optimal arrangement of buffs by experimental method and suggests optimal arrangement of buffs. Experimental results show that the optimal one suggested can reduce the noise level as much as 14 dB (or 18 dB(A)) in the laboratory and as much as 4 dB(A) compared to that of the existing silencer on the ground.