Dynamic Response of Non-Uniform Functionally Graded Beams Subjected to a Variable Speed Moving Load

Journal of Computational Science and Technology

Dinh Kien NGUYEN³  Buntara Sthenly GAN²  Thi Ha LE¹ 

[1] Theoretical Mechanics Group, Hanoi University of Transport and Communications;Department of Architecture, College of Engineering, Nihon University;Institute of Mechanics, Vietnam Academy of Science and Technology

关键词: Functionally Graded Material;    Non-Uniform Beam;    FEM;    Moving Load;    Dynamic Response;   

DOI  :  10.1299/jcst.7.12

学科分类：地球科学(综合)

来源: Japan Academy

【 摘 要 】

References(37)Cited-By(3)The dynamic response of non-uniform functionally graded beams subjected to a variable speed moving point load is studied by using the finite element method. The material properties of the beams are assumed to be graded in the thickness direction by a power law. A beam element, taking the effects of shear deformation, cross-sectional variation and the shift in the neutral axis position, is formulated by using exact polynomials obtained from solutions of the governing differential equations of a homogeneous Timoshenko beam element. The dynamic responses of the beams are computed by using the implicit Newmark method. The numerical results show that the dynamic characteristics of the beams, including the maximum mid-span deflection, mid-span axial stress distribution are greatly influenced by the acceleration and deceleration of the moving load. The effects of the moving speed, material non-homogeneity, cross-section variation as well as aspect ratio on the dynamic response of the beams are investigated in detail and highlighted.

【 授权许可】

Unknown