skip to main content

Title: Structural system identification of a composite shell

Structural system identification is undergoing a period of renewed interest. Probabilistic approaches to physical parameter identification in analysis finite element models make uncertainty in test results an important issue. In this paper, we investigate this issue with a simple, though in many ways representative, structural system. The results of two modal parameter identification techniques are compared and uncertainty estimates, both through bias and random errors, are quantified. The importance of the interaction between test and analysis is also highlighted. 25 refs.
Authors:
; ; ;
Publication Date:
OSTI Identifier:
5752783
Report Number(s):
SAND-91-1904C; CONF-920499--1
ON: DE92009060
DOE Contract Number:
AC04-76DP00789
Resource Type:
Conference
Resource Relation:
Conference: 33. Structural dynamics and materials conference, Dallas, TX (United States), 13-15 Apr 1992
Research Org:
Sandia National Labs., Albuquerque, NM (United States)
Sponsoring Org:
DOE; USDOE, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; COMPOSITE MATERIALS; FREQUENCY ANALYSIS; FINITE ELEMENT METHOD; ALGORITHMS; DATA ANALYSIS; EIGENVALUES; EPOXIDES; GRAPHITE; IMPACT SHOCK; MATHEMATICAL MODELS; MECHANICAL VIBRATIONS; RESPONSE FUNCTIONS; STATISTICS; STRUCTURAL MODELS; CARBON; ELEMENTAL MINERALS; ELEMENTS; FUNCTIONS; MATERIALS; MATHEMATICAL LOGIC; MATHEMATICS; MINERALS; NONMETALS; NUMERICAL SOLUTION; ORGANIC COMPOUNDS; ORGANIC OXYGEN COMPOUNDS 420500* -- Engineering-- Materials Testing