1990 Fiscal Year Final Research Report Summary
Identification of Characteristic Matrices in Vibration Equation
| Project/Area Number |
01550349
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
船舶構造・建造
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| Research Institution | Hiroshima University |
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Principal Investigator |
MICHIMOTO Jun-ichi Hiroshima University, Engineering, Associate Prof., 工学部, 助教授 (80106806)
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| Co-Investigator(Kenkyū-buntansha) |
YAO Tetsuya Hiroshima University, Engineering, Professor, 工学部, 教授 (20029284)
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| Project Period (FY) |
1989 – 1990
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| Keywords | Vibration Equation / Characteristic Matrices / Identification |
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| Research Abstract |
The mass, damping and stiffness matrices in the equation of vibration are called as the characteristic matrices of a vibration system. In this research, a new method to identify the characteristic matrices from the response of the vibration system (transfer function) is proposed. And, the characteristic matrices of a cantilever beam and a free-free beam are identified from the measured transfer function having some experimental error. When the transfer function containing sufficient information about the vibration system is used for identification, the characteristic matrices are accurately identified from the measured results containing some error, and the accuracy of the proposed method is confirmed. Next the characteristic matrices of whole structure is derived by combining the experimentally or theoretically identified characteristic matrices of two sub-structures. The transfer funcTion calculated using combined characteristic matrices of whole structure is a little different from the measured results. Because this difference is caused by the error in the identified characteristic matrices of the sub-structure, for the practical application of these estimation procedure the moRe accurate approach based on the proposed identification method must be developed.
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