Yimer, Tamrat (2009) A Simple Structural System Synthesis from Modal Analysis Results. Masters thesis, Addis Ababa University.
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Abstract
In this paper presented a simple structural system synthesized from modal analysis results. A method for determining the eigenvalues of a synthesized system by using the frequency response function (FRF). This method first used matrix Auto-Regressive Moving Average (ARMA) model in the Laplace domain to describe each subsystem. Then a modal force method by ARMA model could be established. Only the FRF at the connecting joints is needed in the analysis to form a matrix named modal force matrix (FRF matrix). From this matrix, both synthesized system modes and substructure modes could be extracted simultaneously. Since the inverse operation is not required to form modal force matrix, the computation is reduced drastically. The eigensolution of the system in any frequency range could be determined independently. ANSYS and MATLAB software’s used to extract the modal parameters of synthesized structural system and each subsystem separately from this matrix (modal force matrix). Finally compared their results.
| Item Type: | Thesis (Masters) |
|---|---|
| Uncontrolled Keywords: | Mechanical Engineering |
| Subjects: | Q Science > Q Science (General) T Technology > T Technology (General) T Technology > TJ Mechanical engineering and machinery |
| Divisions: | Africana |
| Depositing User: | Andriamparany Edilbert RANOARIVONY |
| Date Deposited: | 20 Jul 2018 12:53 |
| Last Modified: | 20 Jul 2018 12:53 |
| URI: | http://thesisbank.jhia.ac.ke/id/eprint/7949 |
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