Finite Element Model Updating of a Thin Wall Enclosure under Impact Excitation

被引：3

作者：

David-west, O. S. ^{[1
]}

Wang, J. ^{[2
]}

Cooper, R. ^{[1
]}

机构：

[1] Queens Univ Belfast, Sch Mech & Aerosp Engn, Ashby Bldg, Belfast BT9 5AH, Antrim, North Ireland

[2] Univ Kingston, Fac Engn, London SW15 3DW, England

来源：

ADVANCES IN EXPERIMENTAL MECHANICS VII | 2010年 / 24-25卷

基金：

英国工程与自然科学研究理事会;

关键词：

Impact excitation; Model Updating; Frequency Response Function;

D O I：

10.4028/www.scientific.net/AMM.24-25.337

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Simulation result of a structural dynamics problem is dependent on the techniques used in the finite element model and the major task in model updating is determination of the changes to be made to the numerical model so that dynamic properties are comparable to the experimental result. In this paper, the dynamic analysis of a thin wall structure (approx. 1.5 +/- 0.1 mm thick) was realized using the Lanczos tool to extract the modes between 0 and 200 Hz, but the interest was to achieve a good aggreement between the first ten natural frequencies. A shell element with mid size nodes was used to improve the finite element result and the model was tunned using the damping constant, material properties and discretization. The correlation of the results from the impact excitation response test and the finite element was significantly improved. A correlation coefficient of 0.99 was achieved after tunning the model.

引用

页码：337 / +

页数：2

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