| タイトル | Dynamic modeling of structures from measured complex modes |
| 著者（英） | Ibrahim, s. R. |
| 著者所属（英） | Old Dominion Univ. |
| 発行日 | 1982-01-01 |
| 言語 | eng |
| 内容記述 | A technique is presented to use a set of identified complex modes together with an analytical mathematical model of a structure under test to compute improved mass, stiffness and damping matrices. A set of identified normal modes, computed from the measured complex modes, is used in the mass orthogonality equation to compute an improved mass matrix. This eliminates possible errors that may result from using approximated complex modes as normal modes. The improved mass matrix, the measured complex modes and the higher analytical modes are then used to compute the improved stiffness and damping matrices. The number of degrees-of-freedom of the improved model is limited to equal the number of elements in the measured modal vectors. A simulated experiment shows considerable improvements, in the system's analytical dynamic model, over the frequency range of the given measured modal information. |
| NASA分類 | STRUCTURAL MECHANICS |
| レポートNO | 82A30186
AIAA PAPER 82-0770 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/411001 |
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