Browsing by Author "Jayasinghe, JASC"

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    item: Conference-Abstract
    Application of meta-modeling based finite element solution conversion method to develop smart initial guess of conjugate gradient method for solid element simulation
    Jayasinghe, JASC; Bandara, CS; Riaz, MR; Abeykoon, D
    Smart initial guess of Conjugate Gradient (CG) method for solid finite element simulation is developed by using the meta-modeling based finite element solution conversion method. The key feature of this solution conversion method is the rigorousness; the meta-modeling ensures that the most appropriate structural or solid element solution is the one that is close to the solid or structural element solution, respectively, since an error between structural and solid element solutions is accurately defined in a solution space of continuum mechanics. The initial guess of CG method of this study is developed by using an approximate solid element solution which is converted from a relevant structural element solution. Two numerical examples; a cantilever beam and frame problems, of the proposed CG method are presented. The results show that the computational cost is significantly reduced in the proposed CG method as compared to the ordinary CG method. There is an expectation that this reduction of computational cost of solid element simulation will become more significant with the size of the problem targeted.
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    item: Conference-Full-text
    Construction of Consistent Mass Spring Model Based on Meta-Modeling Theory for Seismic Response Analysis of Large Scale Bridge Structures
    (2015-12-29) Jayasinghe, JASC; Hori, M; Riaz, MR; Tamechika, N; Wijerathne, MLL; Ichimura, T
    Abstract: Meta-modeling theory is aimed at constructing a set of analysis models which are consistent with continuum mechanics or a solid element model. This paper presents a consistent mass spring model (CMSM) of a large scale bridge structure, which is constructed according to the meta-modeling theory to make efficient seismic response analysis. The CMSM shares the same dynamic characteristics as the solid element model and can be used to study fundamental seismic responses for a complicated large scale bridge structure that consists of piers and decks. In the numerical experiment, time history analysis is made for six different bridge structures. Full comparison is made for a CMSM and a solid element model of these six bridge structures, and it is shown that the CMSM is able to estimate the dynamic responses such as displacement and base shear for a certain class of ground motions.
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    item: Article-Full-text
    Construction of Consistent Mass Spring Model Based on Meta-Modeling Theory for Seismic Response Analysis of Large Scale Bridge Structures
    (2015-12-29) Jayasinghe, JASC; Hori, M; Riaz, MR; Tamechika, N; Wijerathne, MLL; Ichimura, T
    Meta-modeling theory is aimed at constructing a set of analysis models which are consistent with continuum mechanics or a solid element model. This paper presents a consistent mass spring model (CMSM) of a large scale bridge structure, which is constructed according to the meta-modeling theory to make efficient seismic response analysis. The CMSM shares the same dynamic characteristics as the solid element model and can be used to study fundamental seismic responses for a complicated large scale bridge structure that consists of piers and decks. In the numerical experiment, time history analysis is made for six different bridge structures. Full comparison is made for a CMSM and a solid element model of these six bridge structures, and it is shown that the CMSM is able to estimate the dynamic responses such as displacement and base shear for a certain class of ground motions.