Open Access
ARTICLE
F. Tan1,2, Y.L. Zhang1, Y.H. Wang3, Y. Miao3
CMES-Computer Modeling in Engineering & Sciences, Vol.75, No.1, pp. 1-32, 2011, DOI:10.3970/cmes.2011.075.001
Abstract The meshless hybrid boundary node method (HBNM) for solving the bending problem of the Kirchhoff thin plate is presented and discussed in the present paper. In this method, the solution is divided into two parts, i.e. the complementary solution and the particular solution. The particular solution is approximated by the radial basis function (RBF) via dual reciprocity method (DRM), while the complementary one is solved by means of HBNM. The discrete equations of HBNM are obtained from a variational principle using a modified hybrid functional, in which the independent variables are the generalized displacements and generalized tractions on the boundary… More >
Open Access
ARTICLE
Ali Bekir Yildiz1
CMES-Computer Modeling in Engineering & Sciences, Vol.75, No.1, pp. 33-42, 2011, DOI:10.3970/cmes.2011.075.033
Abstract The generalized method for determination of time constants of linear circuits is introduced. Nodal and mesh analysis, conventional methods whose applications are simpler than the state-space formulation, are used in obtaining the system equations. The approach is based on the use of the relationship between transfer functions and system equations of linear circuits, obtained by the conventional methods. The examples of active and passive circuits are given to illustrate the method. More >
Open Access
ARTICLE
Mohsen Sadeghbeigi Olyaie1, Mohammad Reza Razfar2, Edward J. Kansa3
CMES-Computer Modeling in Engineering & Sciences, Vol.75, No.1, pp. 43-88, 2011, DOI:10.3970/cmes.2011.075.043
Abstract This paper presents integration of reliability analysis with topology optimization design for a linear mircroactuator, including multitude cantilever piezoelectric bimorphs. Each microbimoph in the mechanism can be actuated in both axial and flexural modes simultaneously. We consider quasi-static and linear conditions, and the smoothed finite element method (S-FEM) is employed in the analysis of piezoelectric effects. Since microfabrication methods are used for manufacturing this type of actuator, uncertainty variables become very important. Hence, these variables are considered as constraints during our topology optimization design process and reliability based topology optimization (RBTO) is conducted. To avoid the overly-stiff behavior in FEM… More >
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