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| Dynamic bayesian estimation of desplacement parameters of continuous thin walled straight box with segregating slab based on CG method |
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| DOI：10.7511/jslx20084110 |
| KeyWord:continuous thin walled straight box with segregating slab,finite strip element method,displacement parameters,dynamic Bayesian stochastic estimation,conjugate gradient method |
| ZHANG Jian YE Jian-shu WANG Cheng-qiang |
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| Abstract: |
| The finite strip controlling equation of pinned thin walled straight box is deduced and the indeterminate problem of continuous thin walled straight box with segregating slab is solved based on flexibility theory.With Bayesian theory,dynamic Bayesian error function of displacement parameters of thin walled straight box with segregating slab is derived and the corresponding formulas are deduced.The estimation computing formulas are also obtained by adapting conjugate gradient method.Then the steps of dynamic Bayesian estimation are given and the computing program is completed.Through analysis of a classic example,it is shown that with measured displacement values of the selected nodes,displacement parameters of continuous thin walled straight box with segregating slab can be estimated dynamically by using finite strip element method and conjugate gradient method together and the iterative processes are steadily convergent to the true values if the pre-known information is proper. |