Proceedings of the Korean Society for Noise and Vibration Engineering Conference (한국소음진동공학회:학술대회논문집)
- 2008.11a
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- Pages.387-388
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- 2008
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- 1598-2548(pISSN)
Full Vehicle Modal Testing using Single-Run FRF Measurement and Mode Map Validation
Single-Run FRF 측정을 통한 실차 모달 시험 및 모드맵 검증
- Lee, Keun-Soo (GM Daewoo Auto & Technology, NVH Team) ;
- Jung, Seung-Kyun (GM Daewoo Auto & Technology, NVH Team) ;
- Kim, Jeung-Han (GM Daewoo Auto & Technology, NVH Team)
- Published : 2008.11.20
Abstract
Finding reasonable flexural modes from the full vehicle modal testing has always been a difficult job to N&V engineers due to FRF inconsistency, nonlinearity, heavy damping and, in many cases, interactions between global body structural modes and massive isolate/non-isolated subsystem modes. This paper provides a brier overview of the mode map validation using single-run FRF measurement with highly sensitive accelerometers fur the full vehicle modal analysis and then it can be used to characterize the vehicle's global/local vibration performances, especially customer perceived "structural feel" typically below 40Hz.
Keywords