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Erschienen in:
2021 | OriginalPaper | Buchkapitel
25. Excitation Techniques for Nonlinear Dynamic Systems: A Summary
verfasst von : Mahesh Nagesh, Akhil Sharma, Randall J. Allemang, Allyn W. Phillips
Erschienen in: Nonlinear Structures & Systems, Volume 1
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Abstract
Experimental analysis of nonlinear dynamic mechanical systems is a challenging task. Although well established and widely accepted techniques for Modal Parameter Estimation (MPE) of structures within the linearity assumption exist, several challenges arise once these assumptions cease to be valid i.e. nonlinear systems. Foremost of these challenges in analyzing nonlinear systems is the excitation technique used. While several traditional and non-traditional techniques are available for exciting these systems, each has its own merits and demerits during experimentation and post-processing. This paper summarizes some of these techniques applied to a physical structure and provides a comprehensive discussion on the results obtained. The excitation techniques include impact hammer, electrodynamic shakers, pneumatic system and step relaxation.