Revised modal strain energy method for finite element analysis of viscoelastic damping treated structures

Yanchu Xu; Yanning Liu; Bill S. Wang

doi:10.1117/12.472676

27 June 2002 Revised modal strain energy method for finite element analysis of viscoelastic damping treated structures

Yanchu Xu, Yanning Liu, Bill S. Wang

Proceedings Volume 4697, Smart Structures and Materials 2002: Damping and Isolation; (2002) https://doi.org/10.1117/12.472676
Event: SPIE's 9th Annual International Symposium on Smart Structures and Materials, 2002, San Diego, California, United States

Abstract

In traditional modal strain energy method, the real eigen-vector of each mode obtained from finite element analysis of the corresponding undamped structure is used to calculate modal strain energy in each material layer, and an iterative approach is used in dealing with the frequency dependency of viscoelastic materials. In this paper, a revised modal strain energy method is presented to significantly improve analysis accuracy of the structural natural frequencies and modal loss factors when the material loss factor is high, and a simplified approach is recommended to replace the iterative analysis to avoid tremendous amount of computational effort.

Citation Download Citation

Yanchu Xu, Yanning Liu, and Bill S. Wang "Revised modal strain energy method for finite element analysis of viscoelastic damping treated structures", Proc. SPIE 4697, Smart Structures and Materials 2002: Damping and Isolation, (27 June 2002); https://doi.org/10.1117/12.472676

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