Accession Number : ADP004714

Title :   Finite Element Design of Viscoelastically Damped Structures,

Corporate Author : CSA ENGINEERING INC PALO ALTO CA

Personal Author(s) : Johnson,C. D. ; Kienholz,D. A. ; Austin,E. M. ; Schneider,M. E.

Report Date : NOV 1984

Pagination or Media Count : 28

Abstract : This paper describes four methods for the finite element analysis of structures containing a viscoelastic material. These methods fall into the categories of methods for damping treatment selection or methods for response prediction. The main emphasis of this paper is directed towards the Model Strain Energy (MSE) method. The MSE method uses normal mode techniques and, therefore, is an efficient method for the design of viscoelastically damped structures. The MSE method, implemented by finite element techniques, will aid the analyst in (1) selecting the location of the damping treatment, (2) selecting the damping treatment, (3) predicting the model damping factors, and (4) predicting the responses of the structure. A discussion of finite element modeling methods for structures containing viscoelastic materials is included. Two structures are discussed for which viscoelastic damping treatments were designed using the MSE technique. Comparisons of predicted and measured modal damping and frequencies are given. (Author)

Descriptors :   *DAMPING, *FINITE ELEMENT ANALYSIS, *VISCOELASTICITY, STRUCTURES, DYNAMIC LOADS, DYNAMIC RESPONSE, FREQUENCY RESPONSE, SANDWICH PANELS

Distribution Statement : APPROVED FOR PUBLIC RELEASE