Free Vibration Analysis of a Cross-Ply Laminated Composite Beam on Pasternak Foundation| Science Publications

Journal of Computer Science

R. A. Jafari-Talookolaei¹  M. T. Ahmadian¹ 

关键词: Free vibration;    pasternak foundation;    finite element;    stepped cross-section beam;    multispan beam;   

DOI  :  10.3844/jcssp.2007.51.56

学科分类：计算机科学（综合）

来源: Science Publications

【 摘 要 】

In this study, free vibration analysis of a cross-ply laminated composite beam (LCB) on Pasternak foundation was investigated. Natural frequencies of beam on Pasternak foundation are computed using finite element method (FEM) on the basis of Timoshenko beam theory. Effect of both shear deformation and rotary inertia are implemented in the modeling of stiffness and mass matrices. The model was designed in such a way that it can be used for single-stepped cross-section, stepped foundation and multi-span beams. Results of few examples are compared with finding in literature and good agreements were achieved. Natural frequencies of LCBs with different layers arrangements (symmetric and non-symmetric) are compared. For multi-span beam, variation of frequency with respect to number of spans was also studied.

【 授权许可】

Unknown