高坝抗震高性能并行计算研究及其应用  

Research on High Performance Parallel Computation of High Dam Seismic Analysis and its Application Practice

作　　者：郭胜山 李德玉[1] 涂劲[1] 陈厚群[1] GUO Shengshan;LI Deyu;XU Jin;CHEN Houqun(China Institute of Water Resources and Hydropower Research, Beijing 100048, China)

机构地区：[1]中国水利水电科学研究院,北京市100048

出　　处：《水电与抽水蓄能》2018年第2期42-48,55,共8页Hydropower and Pumped Storage

基　　金：国家重点研发计划资助(2016YFB0201005);中国长江三峡集团公司科研项目资助(XLD/2115);国家自然科学基金项目(51709283)

摘　　要：高坝是复杂的空间结构,其地震响应分析需要同时计入坝体-地基-库水的动态相互作用、坝体伸缩横缝开合的边界非线性、远域坝基的振动能量逸散、近域地基的复杂地形和地质构造、坝体和地基岩体材料的非线性、沿坝基地震动的不均匀性,以及在拱座和地基动力耦合作用下,坝肩潜在滑动岩块的动态稳定性等复杂问题。整个体系的有限元数值计算需要求解几十万、甚至几百万个自由度的方程组。具有120万自由度的沙牌拱坝抗震分析应用单机串行程序计算,需要39d才能完成。在时域内求解如此大规模的非线性动力学问题,计算速度已成为高拱坝地震动分析和抗震安全评价的瓶颈。高性能并行计算已经成为解决大规模科学计算的主要手段。本文作者所在研究团队长期从事高坝地震动响应研究,本文将主要介绍研究团队多年来自主开发的高坝地震动响应并行计算软件(PSDAP)有关理论方法,及其在2010年排名世界上最快运行速度的超级计算机"天河一号"上运行的若干工程实践。The high dam is a very complex special structure that has seismic response analysis needs. Meanwhile,counting into the dam body-foundation-reservoir water dynamic interaction,boundary nonlinearity of dam body expansion transverse crack open and close,shock energy escaping and dispersing in far regional dam foundation,the near regional complicated landforms and geological structure,the material nonlinearity of the dam body and foundation rock mass,the nonuniformity of seismic motion along the dam foundation,and other complicated problems of dam abutment latent sliding rock block dynamic stability under the coupling action of arch supports and foundation dynamics should necessitate to count in seismic response analysis. The finite element numerical computation of the whole system needs to seek solutions to thousands or even millions of freedom equation groups.The seismic analysis of Shapai arch dam with 1.2 million degrees of freedom takes 39 days using stand-alone program. Accordingly,in the time domain,it is to seek solutions to such a large-scalenonlinear dynamic problem that the computer speed has become the bottleneck for high arch dam seismic motion analysis and aseismic safety evaluation. High performance parallel calculation has become one of the main means of solving the problem of large-scale scientific computation. The authors and their research team of this paper have been working on the research of high arch dam structure seismic motion response. In this paper,the theory method of parallel computation software of high arch dam structure seismic motion response which has been developed for several years and its engineering application of several high arch dam by the supercomputer＂ TH-1 A＂ which ranked the 2010 world＇s fastest running speed supercomputer is introduced.

关 键 词：高坝 抗震 高性能并行计算 工程实践 

分 类 号：TV641.1[水利工程—水利水电工程]