A CRACKED BEAM FINITE ELEMENT FOR ROTATING SHAFT DYNAMICS AND STABILITY ANALYSIS

被引：6
|
作者：
El Arem, Saber [1 ]
Maitournam, Habibou [1 ]
机构：
[1] Ecole Polytech, CNRS, Mecan Solides Lab, UMR 7649, F-91128 Palaiseau, France
来源：
JOURNAL OF MECHANICS OF MATERIALS AND STRUCTURES | 2008年 / 3卷 / 05期
关键词：
breathing crack; beam; unilateral contact; finite element; rotor; Floquet; stability;
D O I：
10.2140/jomms.2008.3.893
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this paper, a method for the construction of a cracked beam finite element is presented. The additional flexibility due to the cracks is identified from three-dimensional finite element calculations taking into account the unilateral contact conditions between the crack lips. Based on this flexibility, which is distributed over the entire length of the element, a cracked beam finite element stiffness matrix is deduced. Considerable gain in computing efforts is reached compared to the nodal representation of the cracked section when dealing with the numerical integration of differential equations in structural dynamics. The stability analysis of a cracked shaft is carried out using the Floquet theory.
引用
收藏
页码：893 / 910
页数：18
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