Massively Parallel Mesh-less Analysis System for Fluid-Structure Compied Phenomena in Nuclear Power Plants

核电厂流固现象大规模并行无网格分析系统

基本信息

批准号：
11480121
负责人：
YAGAWA Genki
金额：
$ 8.9万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2001
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-11480121/
关键词：
Free Mesh Method Coupled Analysis Large Scale Analysis Parallel Processing PC Cluster Paralle Computer Nuclear Power Plant エンジニアリング・シミュレーション流体・構造連成解析超並列計算メッシュレス解析

项目摘要

The requirements for analyzing various kind of phenomena in nuclear power plants are the capability to analyze the complex phenomena in nuclear reactor, the efficiency and speed of pre-processing for analyzing them accurately, to make the main analysis process seemless and using massively parallel computers for reducing time and storage costs.In this study, therefore, we developed the following key technologies ; (1) introducing a new analysis strategy, which does not need finite element meshes and are suitable for massively parallel environment, (2) using such a meshless method, developing the massively parallel large scale 3-dimensional analysis codes, which includes free surface and oscillate solid, (3) finally, developing the non-linear and dynamic stress analysis system for the massively parallel large scale 3-dimensional structures considering the effect of thermal-fluid coupled analysis.In this study, we used Free Mesh Method (FMM) as a basic technology, which was a kind of meshless methods. Using this method, we developed fluid-structure coupled analysis system. Concretely, (1) developing the domain decomposition module for analyzing in parallel from nodal based data, (2) developing parallel iterative linear solver with the preconditioning for structure and fluid analysis, (3) developing prototype system for evaluate the system, (4) verifying the efficiency of developed system on the PC clusters, (5) verifying the efficiency of developed system on Hitachi SR2201 and SR8000, (6) integrating the developed system with user interface functions.Because of the high applicability of Free Mesh Method to the parallel processing, we could develop the 3-dimensional large, scale coupled analysis system, which showed high parallel efficiency on both PC clusters, and parallel computers.

分析核电厂中各种现象的要求是分析核反应堆中复杂现象的能力，预处理的效率和速度是准确分析它们的效率和速度，以使主要分析过程看起来毫无平行，并使用大量平行的计算机来降低时间和存储成本。（1）引入一种新的分析策略，该策略不需要有限的要素网格，适用于大规模平行的环境，（2）使用这种无网格的方法，开发大量平行的大型3维分析代码，包括自由表面和振荡固体，包括（3），最终，开发了非平行性和动态压力分析系统，以大规模地构成3型尺度，以实现大规模的构图。分析。在这项研究中，我们使用免费网格方法（FMM）作为基本技术，这是一种无网状方法。使用这种方法，我们开发了流体结构耦合分析系统。（1）开发与基于节点的数据并行分析的域分解模块，（2）开发平行的迭代迭代线性求解器，具有结构和流体分析的预处理，（3）开发用于评估系统的原型系统，（4）（4）（4）验证在PC Cluser上开发的系统的效率，（5）验证系统的效率，（5）验证效率，（5）验证效率，（5）验证效率，（5），（5）验证效率，（5）验证效率，（5）（6）将开发的系统与用户界面函数集成在一起。由于免费网格方法在平行处理中的高适用性，我们可以开发3维大型，比例尺耦合分析系统，该系统在PC簇和并行计算机上都显示出很高的并行效率。