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http://dx.doi.org/10.14775/ksmpe.2022.21.03.086

Time History Analysis of Sturctures Subjected to Random Base Excitation by a Substructuring Method  

Lee, Tae Won (Dept. of Mechanical Design Engineering, Kumoh National Institute of Technology)
Publication Information
Journal of the Korean Society of Manufacturing Process Engineers / v.21, no.3, 2022 , pp. 86-91 More about this Journal
Abstract
The mechanical structures mounted on vehicles or aircrafts are subject to random accelerations, such as earthquakes, at the base, and their responses have been calculated through spectrum analysis. However, this method poses a challenge during the synthesis of the responses owing to the loss of the vibration phase. It is necessary to evaluate the time history results to obtain the exact responses; therefore, an efficient technique is proposed to solve this issue. The present technique involves constructing a superelement using the sub-structuring method and finding solutions for this superelement. The finite element model (FEM) was substituted by a superelement, which was simplified into one element with selected nodes. Comparing the numerical results of the superelement with the time history responses for the original finite element model, the two solutions agree well despite the fact that the computation time of the proposed technique has been greatly shortened.
Keywords
Time History Analysis; Substructuring Method; Random Base Excitation;
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