Papers by Keyword: Structural Simulation

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Authors: Jin Duan, Xiao Ming Chen, Hu Qi, Yun Gui Li
Abstract: In this paper, an integrated simulation system for building structures is presented to satisfy the engineering requirements for high performance simulation. It is a coalition of the traditional design softwares and general finite element analysis (FEA) softwares. This system is developed in the platform of Intel Fortran, using the programming language of Fortran2003/2008. For simplicity, it would be introduced and discussed briefly in the following article. And combining with YJK and ABAQUS, this system is implemented to perform dynamic analysis for a high-rise building. Its capacity and validity would be demonstrated by the numerical results.
Authors: Daniela Ionescu, Maria Kovaci
Abstract: The GHz range is a domain not enough exploited for application in the case of the materials like the CdCr2S4 multiferroic which possesses all four properties of colossal magnetoresistance, electroresistance, is colossal magnetocapacitive and electrocapacitive. The 3D simulation by structural description of such a material represents a real challenge of the descriptive simulational science, due to the complexity of the internal phenomena and interactions which occur here. Dielectric and magnetic properties were reported up to 3 GHz by measurements (Hemberger et al. and so on), while our simulation method is coming to extrapolate the results up to 18 GHz for applications in spintronics and microelectronics. The geometrically frustrated thiospinel system, included in the Heisenberg 3D ferromagnets class, was described with help of the HFSS 13.0 program. An algorithm based on physical consideration was used for the material samples simulated inside a rectangular waveguide, in order to determine their complex electromagnetic parameters (electric permittivity and magnetic permeability). Maxima were found on the real permittivity / permeability graph and by overlapping of the graphs, distinctive resonances were separated. Resonances were linked on the internal structure and the exciting field interaction with the material samples, considering that each mechanism of interaction is dominated by the characteristics of the ferroic propriety involved. A structural resonance map for the microwave range up to 18 GHz was represented. The material presenting all four ferroic properties has resonances specific for each property, but also cumulative resonances, of various magnitude, which can be described only by considering two or more ferroic properties characterizing the same material state.
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