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홍종호;이상호;강연준
- Transactions of the Korean Society for Noise and Vibration Engineering
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- v.14 no.10
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- pp.930-938
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- 2004
This paper presents the noise source identification of a car A/V system. There are two different kinds of noise sources noise generated by loading mechanism and rattle noise by externally forced vibration. A dynamometer has been made to produce stationary inertia to the loading mechanism of A/V system. Sound pressure spectra and sound intensity were measured by operating the dynamometer setup as various motor speeds, and the results were analyzed. A dominant rattle noise source about A/V system's components has been found by multi-dimensional spectral analysis. Residual spectrum method was applied for eliminating coherence between the vibration sources. In result, the dominant rattle noise source was identified by partial coherent output spectrum of individual vibration component.
https://doi.org/10.5050/KSNVN.2004.14.10.930 인용 PDF KSCI

Park, Chan-Il;Cho, Do-Hyun
- Transactions of the Korean Society for Noise and Vibration Engineering
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- v.22 no.4
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- pp.358-364
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- 2012
This work dealt with dynamic characteristics of spur gear and helical gear system to understand the gear vibration and noise. To find out dynamic characteristics in the gear system, a finite element model and an analytic model for the gear system were used. Using the models, the natural frequency and mode-shape characteristics of spur gears and helical gears were calculated. Two models show that natural frequencies of helical gears were lower than those of spur gears. Mode-shape characteristics of gear pairs by analytical model and some issues of finite element modeling were also discussed. Impact test was used to validate the finite element model.
https://doi.org/10.5050/KSNVE.2012.22.4.358 인용 PDF KSCI

Choi, Byung-Jae;Oh, Jae-Eung;Park, Sang-Kil
- Proceedings of the KSME Conference
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- 2008.11a
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- pp.1040-1047
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- 2008
Hypoid gears are widely used in rear drive and 4WD vehicle axles. Investigation of their sensitivity to deflections is one of the most important aspects of their design and optimization procedures. The deflection test is performed in the actual gear mounting using completely processed gear. This test should cover the full operating range of gear loads from no load to peak load. Under peak load the contact pattern should extend to the tooth boundaries without showing a concentration of the contact pattern at any point on the tooth surface. Transmission error is tested on an axle assembly triaxial real car load condition.
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