جستجوی مقالات مرتبط با کلیدواژه « mesh generation » در نشریات گروه « عمران »

Finite-element method is a famous and robust numericalmethod like other numerical methods. Due to the use ofpre-de ned and standard form of shape functions, thismethod will face a dicult situation and without anyaccuracy for exact modeling of the areas. The processof the nite-element network generation, with the appro-priate number and type of elements, is one of the futurechallenges to this approach; its aim is to reduce the com-putational costs in order to discretize and solve the pre-dominant equations of the problem. The derivatives ofanswer usually need the re nement operations to achieveacceptable accuracy in network-based methods. For thispurpose, the methods of the enrichment-displacementre nement, re nement of enhancing element order andre nement of increasing the number of elements, andthe combination methods can be used. The re nementin numerical methods is an ecient tool to reduce thecomputational costs and increase the accuracy of the re-sults obtained. If the parts of the area of solving problem that needs more accuracy be clear, it can greatly reducethe computational complexity with an appropriate pro-cess. In this paper, energy norm of error method andre nement of enrichment-displacement, using the opti-mization algorithm of charged system search, are pre-sented to improve the accuracy of the two-dimensionallinear elasticity. Problems simultaneously use two meth-ods of enrichment and displacement techniques. At rst,replacing the points would reduce the predominant er-ror of the problem. Moreover, in the event of failure toreach an allowable error, in the next step, elements thathave a higher error than permissible one using enrich-ment method of new nodes enter the domain of problem,and new meshing is o ered. Enrichment-displacementmethod continues to obtain the desired accuracy. Theproposed method with achieving a suitable layout for nite-element network, in addition to solving the prob-lem of some nodes occurring in conventional enrichmentmethods, improves the accuracy of answers as well. Fur-thermore, the approximate answers will be provided withthe lower number of degrees of freedom than the com-pared methods. A comparison of result for the presentmethod by other researchers show the eciency and ac-ceptable accuracy of the method.