Abstract
The optimality criteria (OC) method and mathematical programming (MP) were combined to found the sectional optimization model of frame structures. Different methods were adopted to deal with the different constraints. The stress constraints as local constraints were approached by zero-order approximation and transformed into movable sectional lower limits with the full stress criterion. The displacement constraints as global constraints were transformed into explicit expressions with the unit virtual load method. Thus an approximate explicit model for the sectional optimization of frame structures was built with stress and displacement constraints. To improve the resolution efficiency, the dual-quadratic programming was adopted to transform the original optimization model into a dual problem according to the dual theory and solved iteratively in its dual space. A method called approximate scaling step was adopted to reduce computations and smooth the iterative process. Negative constraints were deleted to reduce the size of the optimization model. With MSC/Nastran software as structural solver and MSC/Patran software as developing platform, the sectional optimization software of frame structures was accomplished, considering stress and displacement constraints. The examples show that the efficiency and accuracy are improved.
Similar content being viewed by others
References
Schmit L A. Structural design by systematic synthesis[C]. In: Proceedings of the Second National Conference on Electronic Computation. American Society of Civil Engineering, New York, 1960, 105–132.
Prager W, Taylor J E. Problems of optimal structural design[J]. Journal of Applied Mechanics, 1968, 35(1):102–106.
Prager W, Shield R T. A general theory of optimal plastic design[J]. Journal of Applied Mechanics, 1967, 34(1):184–186.
Venkayya V B. Design of optimum structures[J]. Computers and Structures, 1971, 1(1/2):265–309.
Schmit L A, Farshi B. Some approximation concepts for structural synthesis[J]. American Institute of Aeronautics and Astronautics Journal, 1974, 12(5):692–699.
Fleury C. Structural weight optimization by dual method of convex programming[J]. International Journal for Numerical methods in Engineering, 1979, 14(12):1761–1783.
Schmit L A, Fleury C. Structural synthesis by combining approximation concepts and dual methods[J]. American Institute of Aeronautics and Astronautics Journal, 1980, 18(10):1252–1260.
Fleury C, Schmit L A. Primal and dual methods in structural optimization[J]. American Society of Civil Engineering Journal Structure Division, 1980, 106(5):1117–1133.
Rozvany G I N, Zhou Ming. COC algorithm, Part I: Cross-section optimization or sizing[J]. Computer Methods in Applied Mechanics and Engineering, 1991, 89(1/3):281–308.
Zhou Ming, Rozvany G I N. DCOC: An optimality criteria method for large system, Part I: theory[J]. Structure Optimization, 1992, 5(1):12–25.
Zhou Ming, Rozvany G I N. DCOC: An optimality criteria method for large system, Part II: algorithm[J]. Structure Optimization, 1993, 6(4):250–262.
Sui Yunkang. Modelling, Transformation and Optimization—New Developments of Structural Synthesis Method[M]. Dalian University of Technology Press, Dalian, 1996, 87–177 (in Chinese).
Author information
Authors and Affiliations
Corresponding author
Additional information
Communicated by ZHONG Wan-xie
Project supported by the National Natural Science Foundation of China(No.10472003); the Natural Science Foundation of Beijing(No.3002002); the Science Foundation of Beijing Municipal Commission of Education(No.KM200410005019)
Rights and permissions
About this article
Cite this article
Sui, Yk., Du, Jz. & Guo, Yq. Method based on dual-quadratic programming for frame structural optimization with large scale. Appl Math Mech 27, 383–391 (2006). https://doi.org/10.1007/s10483-006-0315-z
Received:
Revised:
Issue Date:
DOI: https://doi.org/10.1007/s10483-006-0315-z
Key words
- frame structures
- sectional optimization
- dual-quadratic programming
- approximate scaling step
- deletion of negative constraints