Free vibration analysis of axially loaded cracked Timoshenko beam structures using the dynamic stiffness method

被引：50
|
作者：
Viola, E.
Ricci, P.
Aliabadi, M. H.
机构：
[1] Univ Bologna, Distart Dept, I-40136 Bologna, Italy
[2] Univ London Imperial Coll Sci Technol & Med, Dept Aeronaut, London, England
来源：
JOURNAL OF SOUND AND VIBRATION | 2007年 / 304卷 / 1-2期
关键词：
D O I：
10.1016/j.jsv.2007.02.013
中图分类号：
O42 [声学];
学科分类号：
070206 ; 082403 ;
摘要：
In this article, the purpose is to investigate the changes in the magnitude of natural frequencies and modal response introduced by the presence of a crack on an axially loaded uniform Timoshenko beam using a particular member theory. A new and convenient procedure based on the coupling of dynamic stiffness matrix and line-spring element is introduced to model the cracked beam. The application of the theory is demonstrated by two illustrative examples of bending-torsion coupled beams with different end conditions, for which the influence of axial force, shear deformation and rotatory inertia on the natural frequencies is studied. Moreover, a parametric study to investigate the effect of the crack on the modal characteristics of the beam is conducted. (C) 2007 Elsevier Ltd. All rights reserved.
引用
收藏
页码：124 / 153
页数：30
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