Abstract
This paper presents a parallel finite element analysis of large scale shell structures where the CGCG iterative method is utilized as a linear equation solver. The CGCG method is one of the conjugated gradient methods with the coarse grid solver and has been developed for analysis of shell structures in our previous paper. As the CGCG method is based on the domain decomposition method, it can be adapted to the parallelization straightforwardly. As a numerical example, an analysis of pinched cylinder is conducted. Comparing with the results by the BDD method, the parallel CGCG solver shows competitive performance with regard to the computational time and the parallel efficiency and superior efficiency with regard to memory usage. Finally, a large scale shell problem with 10 million degrees of freedom is successfully solved by the present parallel CGCG solver.
