原文传递
Sensitivity Analysis for Displacement-Controlled Finite-Element Analyses
| 题名： | Sensitivity Analysis for Displacement-Controlled Finite-Element Analyses |
| 其他题名： | Al-Aukaily,A.(2017)."Response sensitivity formulations for geometrically nonlinear finite element analysis."Ph.D.thesis,Oregon State Univ.,Corvallis,OR. |
| 正文语种： | 英文 |
| 作者： | Alabbas Al-Aukaily |
| 关键词： | Sensitivity analysis; Finite elements; Nonlinear analysis; Reliability analysis; Numerical methods; Structural safety and reliability |
| 摘要： | Displacement-controlled finite-element analyses are typically employed to simulate the nonlinear static response of structural systems where a loss of load carrying capacity due to localized material failure and/or geometric nonlinearity is expected. To utilize applications such as reliability, optimization, and system identification for structural systems where the peak load capacity is a random variable or where the performance function is defined in terms of the applied load, accurate and efficient gradients of the displacement-controlled response are required. The direct differentiation method (DDM) is applied to the displacement control method in order to compute response sensitivity with respect to the applied load, which is treated as a variable within each pseudotime step. The resulting sensitivity gives the change in structural load carrying capacity with respect to changes in uncertain parameters. To verify the derived sensitivity equations, comparisons between the DDM and the finite-difference method (FDM) are performed through standalone sensitivity analyses of structural systems with material and geometric nonlinearity. Reliability analyses of a steel frame show the importance measures obtained when the performance function is defined in terms of the structural resistance to applied loads in a displacement-controlled analysis are similar to those obtained in a load-controlled analysis where the performance function is defined in terms of the structural displacements. |
| 出版年： | 2018 |
| 论文唯一标识： | P-26Y2018V144N03007 |
| 英文栏目名称： | TECHNICAL PAPERS |
| doi： | 10.1061/(ASCE)ST.1943-541X.0001983 |
| 期刊名称： | Journal of Structural Engineering |
| 拼音刊名(出版物代码)： | P-26 |
| 卷： | 144 |
| 期： | 03 |
| 页码： | 53-62 |
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