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Body/Chassis Dynamic Response Under Experimental Modal Test
ISSN: 0148-7191, e-ISSN: 2688-3627
Published May 16, 2005 by SAE International in United States
Annotation ability available
Mode management is an essential part of the design process for NVH performance. System resonances must be sufficiently separated to minimize interaction from source inputs and each other . Such resonances are typically determined through experimental modal testing conducted in a lab environment under controlled and repeatable conditions. Global vehicle and suspension system response demonstrate soft nonlinear behavior, however. Their resonant frequencies may thus decrease under on-road input not reproducible in a lab environment. Subsequently, mode management charts derived from lab testing may not be representative of the vehicle's on-road dynamic response. This paper presents modal model determination methodologies, and examines suspension system and vehicle global dynamic response under lab modal test and operating conditions. Vehicle suspension modes measured under static and dynamic (rolling) conditions will be compared. Additionally, vehicle global modes determined utilizing lab shaker input will be compared with modes measured on-road.
CitationShaver, R. and Liu, K., "Body/Chassis Dynamic Response Under Experimental Modal Test," SAE Technical Paper 2005-01-2463, 2005, https://doi.org/10.4271/2005-01-2463.
- Achram, L. J. et. al “Applying NVH Basics to Body Design” International Body Engineering Conference Proceedings, (IBEC) October 1996
- Moller, N. Gade, S. “Application of Operational Modal Analysis on Cars” SAE Paper 2003-01-1599 2003
- Shock and Vibration Handbook Harris C. M. McGraw-Hill Book Company 1996
- Hauersperger, D. “Using Modal Analysis, Modeling and Analytical Modifications to Aid in the Development of Automotive Structures” SAE 850995
- Doolan, R.J. Mannino, V.F. “Comparison of Seat System Resonant Frequency Testing Methods” SAE 951335
- Peeters, B. et. al. “Automotive and Aerospace Applications of the PolyMAX Modal Parameter Estimation Method” Proceedings of IMAC 22 2004