ON A STATISTICAL OPTIMIZATION METHOD USED IN FINITE ELEMENT MODEL UPDATING
β Scribed by HUA HONGXING; H. SOL; DE W.P. WILDE
- Publisher
- Elsevier Science
- Year
- 2000
- Tongue
- English
- Weight
- 104 KB
- Volume
- 231
- Category
- Article
- ISSN
- 0022-460X
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β¦ Synopsis
Bayesian estimator is a commonly used statistical optimization technique for "nite element model updating. This paper presents a modi"ed Bayesian estimator and discusses its unbiasedness, e$ciency, learning ability and robustness. The main di!erences from other estimators, for instance, the least-squares method, are shown. The new Bayesian estimator can also be used as a multi-objective, multi-design variable optimization method. An example is presented to demonstrate its features.
π SIMILAR VOLUMES
It is well known that the eigenvalues of finite element models are influenced considerably by mesh refinement. Eigenvalue errors, due to shape function discretisation, persist in the frequency range of interest until the model is fully converged, and generally have a serious affect upon updated para
## Abstract A model which allows the introduction of displacements jumps to conventional finite elements is developed. The path of the discontinuity is completely independent of the mesh structure. Unlike soβcalled βembedded discontinuityβ models, which are based on incompatible strain modes, there