Dynamic stiffness matrix of composite box beams

被引:1
|
作者
Kim, Nam-Il [1 ]
机构
[1] Myongji Univ, Dept Civil & Environm Engn, Yongin 449728, Kyonggi Do, South Korea
来源
STEEL AND COMPOSITE STRUCTURES | 2009年 / 9卷 / 05期
关键词
free vibration; composite box beam; dynamic stiffness matrix; foundation effect; FREE-VIBRATION ANALYSIS; THIN-WALLED-BEAMS; CLOSED-SECTION BEAMS; OPEN CROSS-SECTION; SHEAR DEFORMATION; ELASTIC FOUNDATIONS; NATURAL FREQUENCIES; TIMOSHENKO BEAMS; LAMINATED BEAMS; ELEMENT;
D O I
暂无
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
For the spatially coupled free vibration analysis of composite box beams resting oil elastic foundation under the axial force, the exact solutions are presented by using the power series method based oil the homogeneous form of simultaneous ordinary differential equations. The general vibrational theory for the composite box beam with arbitrary lamination is developed by introducing Vlasov(o)Os assumption. Next, the equations of motion and force-displacement relationships are derived from the energy principle and explicit expressions for displacement parameters are presented based on power series expansions of displacement components. Finally, the dynamic stiffness matrix is calculated using force-displacement relationships. In addition, the finite element model based oil the classical Hermitian interpolation polynomial is presented. To show the performances of the proposed dynamic stiffness matrix of composite box beam, the numerical Solutions are presented and compared with the finite element solutions using the Hermitian beam elements and the results from other researchers. Particularly, the effects of the fiber orientation, the axial force, the elastic foundation, and the boundary condition oil the vibrational behavior of composite box beam are investigated parametrically Also the emphasis is given in showing the phenomenon of vibration mode change.
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页码:473 / 497
页数:25
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