통합 검색 | Korea Science

안병민;장일도;최은오;홍동표;정태진
- 소음진동
- /
- 제7권6호
- /
- pp.1031-1037
- /
- 1997
The main torsional vibration source of the driveline is the fluctuation of the engine torque. The gear rattle is generated by an impact in the backlash due to this torsional vibration. Optimization of the clutch torsional characteristic is one of the effective methods to reduce the idle gear rattle. Many researches have been reported on this problem but only few of them give sufficient consideration to the detail clutch modeling and clutch design parameters (stiffness, hysteresis torque, preload, first stage length). This paper pays attention to the gear impact mechanism and clutch design parameters to reduce the idle gear rattle with computer simulation.
PDF

신수현;정철웅;정성수;강대환
- 한국소음진동공학회논문집
- /
- 제22권6호
- /
- pp.550-555
- /
- 2012
Among the various elements affecting a customer's evaluation of automobile quality, buzz, squeak and rattle(BSR) have been considered to be major factors. In most vehicle manufacturers, the BSR problems are solved by find-fix method with the vehicle road test, mainly due to various excitation sources, complex generation mechanism and subjective response. To systematically tackle the BSR problems in early stage of the vehicle development cycle, these difficulties should be resolved. The aim of the present paper is to characterize the sound quality property of BSR noise that can be used to assess the subjective responses to BSR. The four sound metrics from Zwicker's sound quality parameter are computed for the signals recorded for eight BSR noise source regions localized by using the acoustic-field visualized results. Then, the jury test of BSR noise are performed. On the basis of the computed sound metrics and jury test result is evaluated to represent the harshness of BSR noise. It is expected that the developed BSR measuring system and sound quality properties can be used to reduce the automotive interior BSR noise in terms of subjective levels as well as objective levels.
https://doi.org/10.5050/KSNVE.2012.22.6.550 인용 PDF KSCI

류수정;전인기;최재민;이원구;우재철
- 대한기계학회논문집A
- /
- 제37권5호
- /
- pp.679-683
- /
- 2013
BSR 소음은 특히 자동차에서 도로 표면과 엔진 및 차량내부 스피커등의 진동에 의해 발생한다. 이러한 현상은 진동하는 시스템의 약화된 체결부나 접촉부에서 공진모드와 가진력의 중첩으로 인해서 발생하는 불규칙한 타격이나 스틱슬립(stick-slip)으로 발생한다. 이와 같인 국부적인 현상을 관찰하기 위해서 모든 BSR 발생 부위를 상세 유한요소 모델로 만드는 과정은 현실적으로 불가능 하므로 부분구조 모델 (Sub-structure) 해석 기술이 필요하다. 이번 연구에서는 부분구조 모델 (sub-structure) 해석 기술을 적용하여 실제 가진력이 구조물을 통해 전달되어 발생하는 래틀(rattle)과 스퀵(Squeak)을 검출하고 분석하는 해석적인 방법을 정리하였다.
https://doi.org/10.3795/KSME-A.2013.37.5.679 인용 PDF KSCI