A parallel method for two-level polycondensation of finite element two-level partition based on multi-file stream

A finite element, multi-file technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problems of frequent and complex communication, and the efficiency of parallel computing is not ideal, so as to achieve high communication speed and reduce global communication Effect

Active Publication Date: 2016-07-06
鱼海网络科技(上海)有限公司
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Problems solved by technology

But this method is very limited in practical application. On the one hand, because the structure of multi-level sub-regions is quite complicated, parallel programming is difficult; on the other hand, the main reason is that this method does not fully consider the current large-scale The architectural characteristics of parallel computers lead to frequent and complex communications between different sub-regions at the same level and between different sub-regions at adjacent levels, and the resulting parallel computing efficiency is not ideal

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  • A parallel method for two-level polycondensation of finite element two-level partition based on multi-file stream
  • A parallel method for two-level polycondensation of finite element two-level partition based on multi-file stream
  • A parallel method for two-level polycondensation of finite element two-level partition based on multi-file stream

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[0030] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0031] Such as figure 1 As shown, the overall process of the multi-file flow-based finite element two-level partition two-time polycondensation parallel method mainly includes: firstly, the structural finite element model is divided into N initial sub-areas by the partition software, and the units of each initial sub-area , nodes and load information are stored separately in a file; then each process reads the initial sub-area file information in parallel at the same time to form the system equati...

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Abstract

The invention provides a element two-stage partition and twice polycondensation parallel method based on multiple document flows. The method includes the steps of firstly, dividing a finite element model into a plurality of initial sub-areas, and saving model information of each initial sub-area independently in a document; secondly, by each progress, simultaneously and independently forming a system equation of each sub-area, and performing polycondensation to remove internal freedom degree of each system equation; thirdly, by a local main process, forming packaging sub-area system equations, and performing polycondensation to remove internal freedom degree of each packaging sub-area system equation; fourthly, by the local main process, solving an interface equation, and solving the internal freedom degree of each packaging sub-area system equation by means of back substitution; fifthly, solving internal freedom degree of each initial sub-area according to results of the top packaging sub-areas by means of back substitution; terminating if iteration ends, or else starting again from the second step. On the basis of realizing distributed data storage, large-scale finite element parallel computing efficiency is increased by fully utilizing structural features of large-scale parallel computer systems by means of maximally realizing communication localization.

Description

technical field [0001] The invention relates to a parallel finite element analysis method, in particular to a multi-file flow-based finite element two-level partitioned double polycondensation parallel method. Background technique [0002] As a powerful tool for engineering numerical analysis, the finite element method is widely used in aerospace, shipbuilding, machinery, construction and other departments. Effective Ways. However, for large and complex systems, due to the huge calculation scale and complex solution, it is difficult to overcome the problems of large memory space and long solution time by traditional serial finite element analysis methods. The use of parallel computers to research and develop corresponding parallel algorithms provides a practical method for solving such problems. [0003] In terms of parallel algorithms, the domain decomposition method is based on the simultaneous formation of the overall stiffness matrix and external load vector of each su...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F19/00
Inventor 苗新强金先龙楼云锋杨勋张伟伟
Owner 鱼海网络科技(上海)有限公司
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