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NAOSITE : Nagasaki University's Academic Output SITE > Faculty of Engineering > Bulletin > Reports of the Faculty of Engineering, Nagasaki University > Volume 18, No. 31 >


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Title: Suboptimizationを用いた最適設計の精度に関する研究
Other Titles: A Study of the Precision of Optimum Design using Suboptimization
Authors: 小西, 保則 / 高橋, 和雄 / 龍, 博志
Authors (alternative): Konishi, Yasunori / Takahashi, Kazuo / Ryu, Hiroshi
Issue Date: Aug-1988
Publisher: 長崎大学工学部 / Faculty of Engineering, Nagasaki University
Citation: 長崎大学工学部研究報告, 18(31), pp.122-125; 1988
Abstract: Since the construction scale of structures become larger and their configuration becomes more complicated, the numbers of design variables and constraint conditions increase, and their optimum design falls into difficulty in numerical calculation. Therefore, it is necessary to follow an optimum design using suboptimization. If this method is used for a statically determinate structure, then exactly the same result will be obtained as by the normal method. If there are constraints of displacement for a staticaly determinate structure or if it is a question of a staticaly indeterminate structure, then changes in the section will contribute to changes in internal stress or changes in displacement, so that the results will not be completely identical to those given by the standard method. In this study we attempted a theoretical solution and an analytical solution of the standard values. By using this method and the SLP method we compared the optimum values and the precision of the objective function in Z examples. The result using this method for statically determinate structures gave good precision and no problems. Even with statically indeterminate structures, with a 10 member staticaly indeterminate truss, the errors for specific deviations are great but only 3-7 % for other debviations and 3.1 % for objective functions. Hence this method is eminently practical.
URI: http://hdl.handle.net/10069/24278
ISSN: 02860902
Type: Departmental Bulletin Paper
Text Version: publisher
Appears in Collections:Volume 18, No. 31

Citable URI : http://hdl.handle.net/10069/24278

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