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| Nonlinear finite element reliability analysis of double-layer cylindrical shell based on opensees |
| Received:December 28, 2007 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20101010 |
| KeyWord:shell reliability design point the Bouc-Wen material model the Polak-He algorithm |
| Author | Institution |
| 柳春光 |
大连理工大学 海岸和近海工程国家重点实验室,大连 ;大连理工大学 建设工程学部,大连 |
| 李会军 |
大连理工大学 建设工程学部,大连 |
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| Abstract: |
| In nonlinear finite element reliability analysis, two serious impediments are encountered: for certain material models, the constraint function may have a discontinuous gradient, leading to failure of the search algorithm to converge; The search algorithm may generate trial points too far in the failure domain, where the finite element code fails to produce a result due to lack of numerical convergence [1]. Smoothed material, improved and new algorithms are introduced to address two impediments. Bouc-Wen model addresses the first, and the second one is addressed by improved and new algorithms. Not only the iHL-RF, the Gradient Projection, and the SQP algorithms, but also the Polak-He algorithm is applied in nonlinear reliability analysis of large-span spatial structure. The results show the SQP and the Polak-He algorithms are more efficient than the iHL-RF and the Gradient Projecton algorithms. The Polak-He algorithm is an efficient algorithm. Smoothed material model and algorithms makes nonlinear reliability more convenient, and should be extensively applied. |
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