| Project/Area Number |
11650594
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Building structures/materials
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| Research Institution | NIHON UNIVERSITY |
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Principal Investigator |
TOSAKA Nobuyoshi NIHON UNIVERSITY, COLLEGE OF INDUSTRIAL TECHNOLOGY, PROFESSOR, 生産工学部, 教授 (00059776)
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| Project Period (FY) |
1999 – 2001
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| Project Status |
Completed (Fiscal Year 2001)
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| Budget Amount *help |
¥2,800,000 (Direct Cost: ¥2,800,000)
Fiscal Year 2001: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 2000: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1999: ¥1,500,000 (Direct Cost: ¥1,500,000)
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| Keywords | AUTONOMOUS DECENTRALIZATION / FINITE ELEMENT METHOD / STRUCTURAL MORPHGENESIS / BIOLOGICAL-APPROACH / LOCAL RULE / IMMUNE / SPACE STRUCTURE / TRASS / 構造形態形成 / トラス / 空間構造 / 免疫 / 最小重量設計 / 逆問題 |
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| Research Abstract |
Recent advances on form finding analysis, shape analysis and optimum design of structures in structural engineering are remarkable. There exist various solution methods and procedures to solve these problems. In recent years, a rapid increase in the use of life-like or biological approach such as the evolutional computation (for example, the genetic algorithms )GA) and the immune system) have seen in many fields.
In this research project the applicability of life-like approach to shape analysis, and optimum design of elastic structures is discussed. Our main solution method is developed with the finite element method in conjunction with the concept of autonomous decentralization. This concept is the one of characteristics in life or biological system. The concept of autonomousness is implemented with the idea of local rule in the cell automaton. And the concept of decentralization is introduced with the relaxation technique in solution procedure in order to solve effectively the system of algebric equations.
As numerical examples, the morphgenesis of elastic structure is given in order to show the effectiveness and validity of our method. They are minimum weight design problems of plane truss, and spatial truss structures and self-organization problem in two-dimensional elastic body.
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