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Abstracts & Full Papers
747 - Wave propagation behavior of a multi-connected structure
Nishida A.
Abstract
It is very difficult to predict the occurrence of the natural disaster represented by the earthquake. Therefore, it is necessary to always maintain the safety and functionality in important buildings, such as a nuclear plant. Especially, the necessity for detailed analysis is increasing in response to the latest piping damage accident, and frame structures, such as piping, are gaining in the importance of modeling which can reproduce a real phenomenon. Until now, the author is doing continuously research on the stress wave propagation in frame structures. The periodic structure (structure constituted by repetition of the same pattern) used in the field of architecture and space is analyzed in many cases using the transfer matrix method. Moreover, in the field of civil engineering and the machine structure, it developed as impact engineering and comparison with analysis solutions and experimental results has been performed for simple structures, such as a rod and a beam. The aim of this research is to clarify the wave propagation behavior of non-periodic and complicated assembled structures. A spectrum element method (SEM) is adopted as one of the effective method, and it is groping for application to a real size structure. When carrying out the simulation of the wave propagation phenomenon that targeted even high order frequency, it turns out that the beam element in SEM needs to adopt the element in consideration of shear deformation. Here, a simulation is tried for the frame structure where some components were joined, as the first step for the purpose of the stress wave propagation simulation of the piping structure used for a nuclear plant. In this paper, one example of the application to a multi-connected structure will be introduced.
Citation
Nishida A.: Wave propagation behavior of a multi-connected structure, CD-ROM Proceedings of the Thirtheenth International Congress on Sound and Vibration (ICSV13), July 2-6, 2006, Vienna, Austria, Eds.: Eberhardsteiner, J.; Mang, H.A.; Waubke, H., Publisher: Vienna University of Technology, Austria, ISBN: 3-9501554-5-7