Direct identification of non-proportional modal damping matrix for lumped mass system using modal parameters

被引：3

作者：

Min, Cheonhong ^{[2
]}

Park, Hanil ^{[1
]}

Park, Sooyong ^{[3
]}

机构：

[1] Korea Maritime Univ, Dept Ocean Engn, Pusan 606791, South Korea

[2] Korea Maritime Univ, Grad Sch, Pusan 606791, South Korea

[3] Korea Maritime Univ, Dept Architecture & Ocean Space, Pusan 606791, South Korea

来源：

JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY | 2012年 / 26卷 / 04期

关键词：

Modal analysis; Non-proportional damping system; Identification of system matrices; Direct curve-fitting method; VIBRATION; YOUNGS;

D O I：

10.1007/s12206-012-0221-1

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Several damping materials have been employed to reduce the vibration of marine structures. In this paper, a new method of identifying system matrices for non-proportional damping structures using modal parameters is proposed. This method has two advantages. First, the mass and stiffness matrices do not need to be calculated using the FEM, so errors due to the inaccuracy of these matrices can be reduced. Second, various indirect methods can be used to identify modal parameters such as natural frequencies, modal damping ratios and mode shapes. Three case studies of lumped mass systems with non-proportional damping are carried out to verify the performance of the proposed method in this study.

引用

页码：993 / 1002

页数：10

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