Adjustment of a conservative non gyroscopic mathematical model from measurement
Abstract
A method is presented for calculating the modifications of a discrete, conservative model, which enables to reduce the distance between its dynamic behavior and the one identified on the physical structure. An initial approximate model is known and results from a discretization a priori, for example, by finite element method are obtained. The comparisons of the partial eigensolutions of this model, together with the corresponding eigensolutions identified on the physical structure, were used to locate the spatial area (or groups of degrees of freedom) where the initial model reveals dominant errors. The exploitation of the perturbation method was utilized to calculate the variations of the physical construction parameters, such that the modified model becomes, on a certain frequential field, dynamically similar to the physical structure. The results of a numerical similation are presented.
- Publication:
-
Shock Vibration Information Center Shock Vibration Bulletin
- Pub Date:
- September 1978
- Bibcode:
- 1978SVICB....Q..71B
- Keywords:
-
- Eigenvectors;
- Error Correcting Codes;
- Mathematical Models;
- Stress Analysis;
- Structural Design;
- Finite Element Method;
- Inertia;
- Matrices (Mathematics);
- Stiffness;
- Structural Stability;
- Instrumentation and Photography