|Water Science and Engineering 2011, 4(3) 317-328 DOI: 10.3882/j.issn.1674-2370.2011.03.008 ISSN: 1674-2370 CN: 32-1785/TV|
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Application of SSOR-PCG method with improved iteration format in FEM simulation of massive concrete
Lin HAN*, Zi-ming ZHANG, Zhi-qiang NI
College of Mechanics and Materials, Hohai University, Nanjing 210098, P. R. China
In this study, for the purpose of improving the efficiency and accuracy of numerical simulation of massive concrete, the symmetric successive over relaxation-preconditioned conjugate gradient method (SSOR-PCGM) with an improved iteration format was derived and applied to solution of large sparse symmetric positive definite linear equations in the computational process of the finite element analysis. A three-dimensional simulation program for massive concrete was developed based on SSOR-PCGM with an improved iteration format. Then, the programs based on the direct method and SSOR-PCGM with an improved iteration format were used for computation of the Guandi roller compacted concrete (RCC) gravity dam and an elastic cube under free expansion. The comparison and analysis of the computational results show that SSOR-PCGM with the improved iteration format occupies much less physical memory and can solve larger-scale problems with much less computing time and flexible control of accuracy.
|Keywords： massive concrete symmetric successive over relaxation-preconditioned conjugate gradient method (SSOR-PCGM) improved iteration format finite element method (FEM) numerical simulation|
|Received 2010-10-15 Revised 2011-01-17 Online: 2011-09-30|
This work was supported by the National Natural Science Foundation of China (Grant No. 50808066).
|Corresponding Authors: Lin HAN|
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