A gradient method for viscoelastic behaviour identification of damped sandwich structures

被引：14

作者：

Elkhaldi, Imen ^{[1
]}

Charpentier, Isabelle ^{[1
]}

Daya, El Mostafa ^{[1
,2
]}

机构：

[1] UMR CNRS 7239, Lab Etud Microstruct & Mecan Mat, F-57045 Metz 01, France

[2] Georgia Tech Lorraine, Unite Mixte Int UMI GT CNRS 2958, F-57070 Metz, France

来源：

COMPTES RENDUS MECANIQUE | 2012年 / 340卷 / 08期

关键词：

Vibrations; Sandwich structures; Viscoelastic model; Complex non-linear eigenvalue solver; Parameter identification; Gradient method; Automatic differentiation; ASYMPTOTIC NUMERICAL-METHOD; DESIGN; DIFFERENTIATION; SENSITIVITY;

D O I：

10.1016/j.crme.2012.05.001

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

The damping properties estimation assumes a viscoelastic model calibrated from experiments and simulations. This Note presents a gradient method for viscoelastic behaviour identification of damped sandwich structures devoted to the passive control of mechanical vibration. The method combines experimental data, numerical simulations realized with a complex non-linear eigenvalue solver using the asymptotic numerical method, and optimal control for the identification of viscoelastic parameters. An automatic differentiation tool is used to get numerical derivatives exact up to the machine precision with minimal user effort. Results are presented for a sandwich beam with a frequency dependent viscoelastic core. (c) 2012 Academie des sciences. Published by Elsevier Masson SAS. All rights reserved.

引用

页码：619 / 623

页数：5