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Complex Perturbation Method for Sensitivity Analysis of Nonlinear Trusses
| 题名： | Complex Perturbation Method for Sensitivity Analysis of Nonlinear Trusses |
| 正文语种： | 英文 |
| 作者： | Ravi Kiran, S.M.ASCE; Lei Li, S.M.ASCE;Kapil Khandelwal, A.M.ASCE |
| 作者单位： | Univ, of Notre Dame |
| 关键词： | Sensitivity analysis; Nonlinear trusses; Finite-difference methods; Complex analysis; Finite-element analysis; Analysis and computation. |
| 摘要： | A numerical method based on complex analysis is presented for obtaining response sensitivities of three-dimensional (3D) trusses with geometrical and material nonlinearities. To this end, a complex perturbation method for sensitivity analysis is proposed that can be used in conjunction with the finite-element method. Performance of the complex perturbation method is demonstrated by evaluating response sensitivities of linear elastic, hyperelastic, and hyperelastic-plastic 3D trusses. To validate the method, the sensitivity data obtained from the complex perturbation method are compared with analytical sensitivity data and the central difference method. Advantages and limitations of complex perturbation method are discussed, and it is shown that the complex perturbation method can be used to obtain sensitivity data of analytical quality. DOI: 10.106l/(ASCE)ST.1943-541X.0001619. © 2016 American Society of Civil Engineers. |
| 出版日期： | 2017.01 |
| 出版年： | 2017 |
| 期刊名称： | Journal of Structural Engineering |
| 卷： | Vol.143 |
| 期： | NO.01 |
| 页码： | 04016154 |
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