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Modal Parameter Estimation on Automotive Development
Technical Paper
2012-36-0641
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Modal parameter identification is used to identify those parameters of the model which describe the dynamic properties of a vibration system. Structural dynamic methods and technologies have been used with great success by the automotive industry. Experimental Modal Analysis is the process of determining the modal parameters (modes, natural frequencies, damping factors) of a linear, time-invariant system. One common reason for experimental modal analysis is the verification or correction of the results of the analytical approach. Another reason to extract the modal parameters experimentally is due to its use for future evaluations such as structural modifications. This paper presents the Experimental Modal Analysis of a car in trimmed body configuration which represents a complex system due to the systems attached to it, increasing its damping and measuring noise. Both frequency and time domain system identification methods are studied to obtain the main modes of the structure. The process steps to correctly identify global modes are also addressed. Results from numerical model and actual physical testing are compared to the main flexible modes of the structure.
Authors
Citation
Sczibor, V., Alves, P., and Bringhenti, I., "Modal Parameter Estimation on Automotive Development," SAE Technical Paper 2012-36-0641, 2012, https://doi.org/10.4271/2012-36-0641.Also In
References
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- Formenti, David 1999 What is the Coherence Function and How Can It Be Used to Find Measurement and Test Setup Problems? Sound and Vibration
- Maia, N.M.M. Silva, J.M.M. 1997 Theoretical and experimental modal analysis John Wiley & Sons