Development and application of SAPTIS-software of multi-field simulation and nonlinear analysis of complex structures(Part III)

SAPTIS is a FEM-based software for simulation and nonlinear analysis of complex structures. Through the discussion made on the key technology of FEM parallelization,the parallelization strategy of SAPTIS is given herein,and then three parallelization modes in the solving part of SAPTIS are introduced:( 1) Based on the OpenMP platform,the parallelization with more fine grain is realized for the PCG solver.( 2) Based on the MPI platform,the parallelized solver with the Krylov subspace methods and several preconditioning techniques is enriched for SAPTIS.( 3) Based on the OpenMP platform,the parallelized solver of sparse direct method is enriched. The test result shows that all the efficiencies of the three parallelized solving schemes are very high and each has its own characteristics; by which the solving functions of SAPTIS are enriched as well. Furthermore,the GPU solver is still in development,which will make the SAPTIS software more powerful,flexible and adaptable.