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Structural Engineering and Mechanics Volume 7, Number 1, January 1999 , pages 81-94 DOI: https://doi.org/10.12989/sem.1999.7.1.081 |
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Dynamic analysis of trusses including the effect of local modes |
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Levy E, Eisenberger M
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| Abstract | ||
| The dynamic analysis of trusses using the finite element method tends to overlook the effect of local member dynamic behavior on the overall response of the complete structure. This is due to the fact that the lateral inertias of the members are omitted from the global inertia terms in the structure mass matrix. In this paper a condensed dynamic stiffness matrix is formulated and used to calculate the exact dynamic properties of trusses without the need to increase the model size. In the examples the limitations of current solutions are presented together with the exact results obtained from the proposed method. | ||
| Key Words | ||
| dynamic stiffness matrix, local mode shape, large structure, condensed dynamic stiffness matrix, finite elements | ||
| Address | ||
| Levy E, Technion Israel Inst Technol, Fac Agr Engn, IL-32000 Haifa, Israel Technion Israel Inst Technol, Fac Agr Engn, IL-32000 Haifa, Israel Technion Israel Inst Technol, Fac Civil Engn, IL-32000 Haifa, Israel | ||