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- W2033458149 abstract "A new algorithm for structural redesign by perturbation is developed. It allows for large changes between baseline and objective structures and can satisfy both modal and static displacement objectives. It is faster and more accurate than previously developed perturbation resizing methods because it advances incrementally to the objective structure using large admissible perturbations. The computer code developed is used as postprocessor to general or special purpose finite element codes, to improve upon the design of structures with unacceptable modal and/or static displacement response. Depending on the relation betweem the number of redesign goals, allowable structural changes, and admissibility constraints, the desired redesign may be feasible - either locally optimal or unique - or may not exist. In the latter case, a minimum-error inadmissible design is produced. Several numerical examples are used to study the effects of definition and relaxation of the redesign admissible domain and demonstrate the accuracy of the new redesign algorithm. An offshore tower with repeated eigen-values and 192 degrees of freedom is also redesigned subject to frequency, static displacement goals, and admissibility constraints. 22 refs." @default.
- W2033458149 created "2016-06-24" @default.
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- W2033458149 date "1991-01-01" @default.
- W2033458149 modified "2023-09-27" @default.
- W2033458149 title "Admissible large perturbations in structural redesign" @default.
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- W2033458149 doi "https://doi.org/10.2514/3.10551" @default.
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