Parametric updating of a finite element model from experimental modal characteristics. (English) Zbl 0709.73076
Summary: The finite element model updating process developed at ONERA is based on the minimisation of input errors in the dynamic equilibrium equations. The reaction forces due to incorrect stiffness or mass matrix of the model are used to localise the predominant errors and, afterwards, to find correcting parameters, in order to have a prediction model as close as possible to the real structure. We present the recent evolution of the method with numerical applications to an axisymmetric composite structure and to a truss system.
MSC:
74S05 | Finite element methods applied to problems in solid mechanics |
74H45 | Vibrations in dynamical problems in solid mechanics |
74M05 | Control, switches and devices (“smart materials”) in solid mechanics |
74P99 | Optimization problems in solid mechanics |
93B60 | Eigenvalue problems |