Accession Number : ADP004716

Title :   Results of Finite Element Analysis of Damped Structures,

Corporate Author : DAYTON UNIV OH RESEARCH INST

Personal Author(s) : Kluesener,M. F.

Report Date : NOV 1984

Pagination or Media Count : 12

Abstract : Finite Element Analysis (FEA) is being used increasingly to model passive damping configurations on integrally damped structures. However, the modeling of passive damping designs on complex structures poses two problems. First of all, the thin damping layers generally result in high aspect ratios (length divided by thickness) of the 3D solid elements representing the damping system. Secondly, if a multilayered damping system is modeled, there are a large number of degrees-of-freedom which results in a costly computer run. This paper discusses ways to reduce the number of elements representing the damping system and the accuracy of the damping prediction using high aspect ratios. Experimental tests and corresponding FEA of a double constrained layer damped cantilever plate show that aspect ratios up to 1000:1 yield very accurate results. The experimental FEA comparison also shows that FEA modeling techniques such as using membrane elements for the constraining layers or using an equivalent element to represent several layers of the damping system yield good results and save considerable computer time. (Author)

Descriptors :   *DAMPING, *FINITE ELEMENT ANALYSIS, *STRUCTURES, CONFIGURATIONS, EXPERIMENTAL DATA

Distribution Statement : APPROVED FOR PUBLIC RELEASE