High-efciency improved symmetric successive over-relaxation preconditioned conjugate gradient method for solving large-scale finite element linear equations

摘要

Fast solving large-scale linear equations in the finite element analysis is a classical subject in computational mechanics. It is a key technique in computer aided engineering(CAE) and computer aided manufacturing(CAM). This paper presents a high-efciency improved symmetric successive over-relaxation(ISSOR) preconditioned conjugate gradient(PCG) method, which maintains the convergence and inherent parallelism consistent with the original form. Ideally, the computation can be reduced nearly by 50% as compared with the original algorithm. It is suitable for high-performance computing with its inherent basic high-efciency operations. By comparing with the numerical results, it is shown that the proposed method has the best performance.