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http://dx.doi.org/10.5050/KSNVN.2005.15.1.112

Investigation of Efficiency of Starting Iteration Vectors for Calculating Natural Modes  

Kim, Byoung-Wan (한국해양연구원 해양시스템안전연구소)
Kyoung, Jo-Hyun (한국해양연구원 해양시스템안전연구소)
Hong, Sa-Young (한국해양연구원 해양시스템안전연구소)
Cho, Seok-Kyu (한국해양연구원 해양시스템안전연구소)
Lee, In-Won (한국과학기술원)
Publication Information
Transactions of the Korean Society for Noise and Vibration Engineering / v.15, no.1, 2005 , pp. 112-117 More about this Journal
Abstract
Two modified versions of subspace iteration method using accelerated starting vectors are proposed to efficiently calculate free vibration modes of structures. Proposed methods employ accelerated Lanczos vectors as starting iteration vectors in order to accelerate the convergence of the subspace iteration method. Proposed methods are divided into two forms according to the number of starting vectors. The first method composes 2p starting vectors when the number of required modes is p and the second method uses 1.5p starting vectors. To investigate the efficiency of proposed methods, two numerical examples are presented.
Keywords
Natural Mode; Subspace Iteration Method; Starting Iteration Vector;
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