Abstract: In Tahoe frame (an open source software) and finite element (FE) pre-processing/post-processing soft wares (MSC.Patran and Tecplote),an FE model of clamp structure was created.Serial and parallel computations of a model with 2.62 million-freedom degree are achieved successfully with domain decomposition,compiling of interfaces and iterative algorithm solvers provided in PHG solvers(preconditioned conjugate gradient methods).It indicates that convergence of parallel computation is faster than serial one's,and computation time of a four-procedure parallel is less than one forth of that of serial one.Accuracy of computing is validated by comparing with result of MSC.Nastran.Parallel computing performance of the frame is tested with a large parallel computer.The maximum testing number is 32 nodes.It shows that an updated Tahoe frame is feasible in parallel computing of large-scale freedom degree models.Parallel computing time is nearly linearly reduced with increasing of computing nodes.

Key words: parallel computing, finite element, domain decomposition, preconditioned conjugate gradient, speedup