A gradient method for viscoelastic behaviour identification of damped sandwich structures

作者：Elkhaldi Imen; Charpentier Isabelle^*; Daya El Mostafa

来源：Comptes Rendus Mecanique, 2012, 340(8): 619-623.

DOI：10.1016/j.crme.2012.05.001

• Vibrations
• Sandwich structures
• Viscoelastic model
• Complex non-linear eigenvalue solver
• Parameter identification
• Gradient method
• Automatic differentiation

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.

• 出版日期2012-8