contributor author | R. I. Levin | |
contributor author | T. P. Waters | |
contributor author | N. A. J. Lieven | |
date accessioned | 2017-05-08T23:58:22Z | |
date available | 2017-05-08T23:58:22Z | |
date copyright | July, 1998 | |
date issued | 1998 | |
identifier issn | 1048-9002 | |
identifier other | JVACEK-28844#733_1.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl/handle/yetl/121419 | |
description abstract | This paper investigates the effects of adjusting the system matrices of a Finite Element (FE) model on the eigen-properties of the model for the purposes of dynamic model updating. It is shown that minor modifications to the connectivity of the model can cause unexpectedly significant eigenvalue perturbations of the lower modes, especially if the physical location of the modification is near an antinode of vibration of a lower mode. These modifications can be introduced either by non-parametric updating techniques or unwittingly by truncation of the FE structural matrices. It is proposed that model updating techniques specifically avoid introducing such changes to the model either directly or indirectly. A mathematical bound has been established which gives a limit on eigenvalue perturbations. From this bound it has been deduced that a definable degree of computational precision is necessary for FE analysis for the purposes of model updating. | |
publisher | The American Society of Mechanical Engineers (ASME) | |
title | Required Precision and Valid Methodologies for Dynamic Finite Element Model Updating | |
type | Journal Paper | |
journal volume | 120 | |
journal issue | 3 | |
journal title | Journal of Vibration and Acoustics | |
identifier doi | 10.1115/1.2893891 | |
journal fristpage | 733 | |
journal lastpage | 741 | |
identifier eissn | 1528-8927 | |
keywords | Accuracy | |
keywords | Finite element model | |
keywords | Eigenvalues | |
keywords | Finite element analysis | |
keywords | Vibration AND Dynamic models | |
tree | Journal of Vibration and Acoustics:;1998:;volume( 120 ):;issue: 003 | |
contenttype | Fulltext | |