Modal characteristics of cracked rotors using a conical shaft finite element

被引:18
作者
Mohiuddin, MA [1 ]
Khulief, YA [1 ]
机构
[1] King Fahd Univ Petr & Minerals, Dept Engn Mech, Dhahran 31261, Saudi Arabia
关键词
D O I
10.1016/S0045-7825(97)00345-9
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
A finite element model of a tapered rotating cracked shaft is developed for modal analysis and dynamic modeling of rotor-bearing systems. The finite shaft element has ten degrees of freedom and accounts for linear tapering. The flexibility compliance due to the crack is computed using fracture mechanics approach. The formulation of the tapered rotating cracked finite element includes shear deformation and rotary inertia. The shape functions are derived and explicit expressions for the element mass, stiffness and gyroscopic matrices are obtained using consistent mass formulation. The generalized eigenvalue problem is defined and numerical solutions are obtained for a wide range of whirl ratios, crack depths and crack locations. Comparisons with other results reported in the literature are presented. (C) 1998 Elsevier Science S.A. All rights reserved.
引用
收藏
页码:223 / 247
页数:25
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