Pattern Formation of Flexible Structure by Interaction with Eenvironment
| Project/Area Number |
11650246
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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 |
Dynamics/Control
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| Research Institution | KOBE UNIVERSITY |
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Principal Investigator |
KAWAMURA Shozo Kobe University, Faculty of Engineering, Associate Professor, 工学部, 助教授 (00204777)
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| Co-Investigator(Kenkyū-buntansha) |
ADACHI Kazuhiko Kobe University, Faculty of Engineering, Research Associate, 工学部, 助手 (30243322)
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| Project Period (FY) |
1999 – 2000
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| Project Status |
Completed (Fiscal Year 2000)
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| Budget Amount *help |
¥3,400,000 (Direct Cost: ¥3,400,000)
Fiscal Year 2000: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1999: ¥2,600,000 (Direct Cost: ¥2,600,000)
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| Keywords | Flexible Structure / Discrete Method / Cellular Automata / Nonlinear System / Vibration Mode / Wave propagation / Pattern Formation |
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| Research Abstract |
1. Dynamic Response Analysis of Structure by Using the Discrete Computation Method The dynamic response of flexible structures with non-linearity are analyzed by using the Cellular Automata (CA) method, which is one of the discrete computation method. The equivalent condition of force is considered as the interaction between the structure and environment, and the local rules are derived from the conditions. The forced oscillations are calculated by using the CA method and the results are compared with the ones obtained by using the conventional method. It was seen that the results agree well.
2. Applications of the Proposed Computation Method
(1) Active Vibration Control : The vibration of a string is actively controlled by the control rule. The simulation can be carried out by using the CA method.
(2) Wave Propagation of Earthquake : The wave propagation phenomenon of earthquake is calculated by using the CA method. It was seen that the computation time can be much reduced.
3. Experimental Study
The thin plate is considered as the flexible structure and is acoustically excited. The steady state responses by experiment can be simulated by using the CA method when the excitation force is weak. But when the excitation force is strong, there are not only the structural non-linearity but also the non-linearity of excitation. So the experimental and simulated results do not agree well. It is necessary that the non-linearity of excitation is considered in the simulation.
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Report
(3 results)
Research Products
(7 results)
