A parallel method for solving seepage field by improved SSORPCG of finite element domain decomposition

A technology of area decomposition and finite element, applied in geometric CAD, instruments, complex mathematical operations, etc., can solve problems that are not suitable for parallel solutions, avoid restrictions and improve computational efficiency

Active Publication Date: 2019-02-19
HOHAI UNIV
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  • A parallel method for solving seepage field by improved SSORPCG of finite element domain decomposition
  • A parallel method for solving seepage field by improved SSORPCG of finite element domain decomposition
  • A parallel method for solving seepage field by improved SSORPCG of finite element domain decomposition

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[0052] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0053] The invention proposes a parallel method for solving seepage field by improving SSORPCG by finite element domain decomposition. This method decomposes the finite element model serially and merges the results, and performs parallel calculations in the middle process. The specific calculation flow chart is as attached figure 1 shown. It mainly includes five steps: (1) Establish a solution model, perform finite element discretization on the model, and obtain the structural information of the model, including the total number of units, unit information and node information; (2) Model area decomposition, according to the number of P processes and the number of processors Topological structur...

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Abstract

The invention discloses a parallel method for solving seepage field by improved SSORPCG of finite element domain decomposition, which is characterized in that the method comprises the following steps:a solution model is established, the finite element discretization is carried out on the model, and the structural information of the model is obtained; The domain decomposition method is used to partition the model, and the corresponding data files of P sub-regions and each sub-region are obtained. Message passing interface MPI is initialized, finite element governing equation is formed by variational principle; According to Darcy's law, the seepage field of each zone is obtained. Step 5, the results of the P sub-regions are merged to obtain the calculation results of the whole model. Advantages: all processors are independent of each other in the calculation of partition, each process is equal, thus effectively avoiding the limitation of the main process, can maximize the capacity of the computation node, to carry out larger-scale parallel computing; The computational efficiency of solving large sparse coefficient matrix equations is effectively improved in the finite element analysis.

Description

technical field [0001] The invention relates to a parallel method for solving seepage field by improving SSORPCG by finite element region decomposition, and belongs to the technical field of numerical simulation calculation and large-scale parallel calculation of hydraulic engineering finite element engineering. Background technique [0002] In recent years, computers have continued to develop and progress at an astonishing rate, with great progress and remarkable results in computing performance. However, with the improvement of calculation scale and calculation accuracy, especially in data-intensive and calculation-intensive numerical analysis applications, the more frequent the use of finite element analysis, the performance of ordinary computers can no longer meet the needs of these fields. Looking for Efficient parallel algorithms have become one of the indispensable ways of current computing. [0003] In actual water conservancy projects, it is often required to solve...

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Application Information

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IPC IPC(8): G06F17/50G06F17/12
CPCG06F17/12G06F30/13G06F30/23
Inventor 赵兰浩彭大伟齐慧君毛佳李同春邵琳玉
Owner HOHAI UNIV
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