Research of efficient FEM algorithm with precise and parallel computing
A FEM platform is developed to support high precision electric field computing and data analysis. For the precise computing of 550kV SF6 arc quenching chamber, a solve regions division project is presented to improve meshes quality and computation efficiency. At the same time, approach regular triangle algorithm is realized by combing the uniform and gradient disperse for boundary, constraint condition of maximize minimal native angle, and ripple model about mesh optimizing. By calculation, it can be obtained that the ratio of high quality messes approach regular triangle degree γ≥0.8 is about 87%, and ratio of high quality messes that minimum native angle is not less than 40° is about 95%. The parallel computing algorithm about coefficient matrix is designed based on the dynamic compressing storage structure and multi-thread technology. The calculated instances analysis show that the errors of this algorithm are smaller than by ANSYS software, the efficient of matrix calculation solution raises 30%∼40% than general method for this model, and this algorithm consumes less memory.