parametrized variational principles in dynamics applied to the optimization of dynamic models of plates

摘要

We investigate the use of Parametrized Varia- tional Principles (PVP) in linear structural dynamics. Our main objective is to assess whether the free parameters can be used to enhance the accuracy of dynamic models on a fixed mesh. Consistent, boundary-consistent and lumped mass matrices are defined within the framework of the PVP. The accuracy provided by three different mass ma- Trices in the computation of plate frequencies s numeri- Cally studied. A method to update the free parameters on An element by element basis to improve the dynamic Model is presented.