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- W2313222350 abstract "This paper discusses a method of synthesizing a system from substructure test data that significantly reduces modal truncation errors. Because experimental results are restricted to a limited number of low frequency modes, large truncation e r ro r s can result from the use of only the measured modes. With this method residual flexibility and residual mass matrices a re calculated from the analytical Finite Element Model and are used to augment the measured test data. These residual terms a re shown to account for the flexibility at the suhstructure's interface that is lost due to omitting the high e r order modes. This modal coupling method utilizes an inertial coupling teclinique that has unconstrained interface coordinates ior the main body structure. Mass simulators a re added at the interface locations to represent the boundary loadings of the major components wliose modal characteristics a re determined separately. The method is used to couple two DSCS III* spacecraft structures to form a tandem-launched configuration. By performing two tests on a single spacecraft structure, a major cost reduction is achieved by eliminating one test structure and by greatly simplifying each test. The coupled system resonant frequencies and mode shapes obtained from tlie FEM analysis showed significant improvement due to residual effects, and the results using experimental data indicated similar trends." @default.
- W2313222350 created "2016-06-24" @default.
- W2313222350 creator A5091612298 @default.
- W2313222350 date "1984-05-14" @default.
- W2313222350 modified "2023-10-16" @default.
- W2313222350 title "LARGE SPACE STRUCTURE ANALYSIS USING SUBSTRUCTURE MODAL TEST DATA" @default.
- W2313222350 cites W2070372858 @default.
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- W2313222350 doi "https://doi.org/10.2514/6.1984-942" @default.
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