DYNAMIC CHARACTERISTIC ANALYSIS OF A 3-D SEMI-SUBMERGED BODY AS A FLUID-STRUCTURE INTERACTION SYSTEM

• Published in: Applied mathematics and mechanics Vol. 25; no. 3; pp. 338 - 346
• Main Author: 徐刚 任文敏
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Nature B.V 01.03.2004; Department of Engineering Mechanics, Tsinghua University,Beijing 100084, P.R.China
• Edition: English ed.
• Subjects: Arnoldi理论; Dynamic characteristics; Eigenvalues; Fluid-structure interaction; Iterative methods; Mathematical analysis; Submerged bodies; Thin wall structures; 动力学特征分析; 悬浮物体; 有限元理论; 流体结构相互作用; 船舶静力学; semi-submerged body; fluid-structure interaction; finite element method; Arnoldi's method
• ISSN: 0253-4827; 1573-2754
• DOI: 10.1007/bf02437337

An Arnoldi's method with new iteration pattern, which was designed for solving a large unsymmetric eigenvalue problem introduced by displacement-pressure FE (Finite Element) pattern of a fluid-structure interaction system, was adopted here to get the dynamic characteristics of the semi-submerged body. The new iteration pattern could be used efficiently to obtain the Arnoldi's vectors in the shift-frequency technique, which was used for the zero-frequency problem. Numerical example showed that the fluid-structure interaction is one of the important factors to the dynamic characteristics of large semi-submerged thin-walled structures.