本文選題：并行計(jì)算 + 有限元方法��； 參考：《天文學(xué)進(jìn)展》2013年02期

【摘要】：波江座α是一顆具有代表性并被比較充分觀測(cè)的快速自轉(zhuǎn)恒星。以該星為例,建立了一種可以利用有限的觀測(cè)數(shù)據(jù)有效反演此類恒星橢球形狀及其內(nèi)部結(jié)構(gòu)的并行數(shù)值方法。求解此問(wèn)題的經(jīng)典近似方法 (一般)只對(duì)慢速旋轉(zhuǎn)的恒星有效,需要對(duì)旋轉(zhuǎn)角速度作小擾動(dòng)假設(shè);而該方法為嚴(yán)格數(shù)值求解恒星的旋轉(zhuǎn)多方球模型,對(duì)快速旋轉(zhuǎn)的情形仍然保持有效。該方法采用的大規(guī)模并行有限元方法,對(duì)超級(jí)計(jì)算設(shè)備的性能與計(jì)算方法實(shí)現(xiàn)的效率都有很高的需求。計(jì)算表明,如果有限元網(wǎng)格包含數(shù)千萬(wàn)單元水平,則經(jīng)過(guò)充分內(nèi)存優(yōu)化的代碼在上海超級(jí)計(jì)算中心曙光5000A超級(jí)計(jì)算機(jī)上運(yùn)行需要不少于1024核的資源。
[Abstract]:The constellation a is a representative and fully observed fast rotating star. Taking the star as an example, a parallel numerical method is developed to effectively inverse the ellipsoid shape and its internal structure of this kind of star using limited observational data. The classical approximate method for solving this problem is effective only for slowly rotating stars, and requires a small perturbation assumption of rotation angular velocity, and the method is a strict numerical solution to the rotating multi-sphere model of stars. It is still valid for fast rotation. The large scale parallel finite element method used in this method has a high demand for the performance of supercomputing equipment and the efficiency of the calculation method. The calculation shows that if the finite element mesh contains tens of millions of elements, the code with sufficient memory optimization needs no less than 1024 cores to run on the dawning 5000A supercomputer of Shanghai supercomputing center.
【作者單位】： Department
【基金】：上海市科學(xué)技術(shù)委員會(huì)(1201H116400)
【分類號(hào)】：P145.4

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本文編號(hào)：2004192