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首頁> 外文OA文獻 >A Simultaneous Iterative Scheme for the Craig-Bampton Reduction Based Substructuring
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A Simultaneous Iterative Scheme for the Craig-Bampton Reduction Based Substructuring

機譯:基于Craig-Bampton約簡的子結(jié)構(gòu)的同時迭代方案

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摘要

A simultaneous iterative procedure for the fixed-interface component modal synthesis (CMS) method is developed in this paper toward fast calculating the modal parameters and ROM of a large-scale and/or complicated structure. Different from existing iterative fixed-interface CMS methods, in the proposed iterative scheme, an eigenvalue independent matrix, whose columns’ projections in the exact reduced space are the global eigenvectors of interest, is chosen as the iterative term and then used as a Ritz basis to generate reduced system matrices. Consequently, all the required modes can be solved simultaneously and a ROM can be derived after one round of iterations. For reference, an implementation is given together with computational considerations. Compared with other methods for solving modal parameters and/or model order reduction, the proposed method has such merits as high computational efficiency, especially for reanalysis tasks and parallel programming. A numerical example is provided to illustrate and validate the proposed method.
機譯:為快速計算大規(guī)模和/或復(fù)雜結(jié)構(gòu)的模態(tài)參數(shù)和ROM,本文開發(fā)了固定接口組件模態(tài)綜合(CMS)方法的同時迭代過程。與現(xiàn)有的迭代固定接口CMS方法不同,在提出的迭代方案中,選擇一個特征值獨立矩陣作為迭代項,然后將其用作Ritz基礎(chǔ),該矩陣的列在精確縮小的空間中的投影是目標全局特征向量。生成簡化的系統(tǒng)矩陣。因此,可以同時解決所有需要的模式,并且在一輪迭代后可以導(dǎo)出ROM。作為參考,給出了一種實現(xiàn)方式以及一些計算方面的考慮。與其他求解模態(tài)參數(shù)和/或模型降階的方法相比,該方法具有計算效率高的優(yōu)點,特別是對于再分析任務(wù)和并行編程。數(shù)值例子說明了該方法的有效性。

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