On the size-dependent vibrations of doubly curved porous shear deformable FGM microshells  

作　　者：Behrouz Karami Mergen H.Ghayesh Shahid Hussain Marco Amabili 

机构地区：[1]School of Electrical and Mechanical Engineering,University of Adelaide,Adelaide,South Australia,Australia [2]Human-Centred Technology Research Centre,University of Canberra,Canberra,Australia [3]School of Engineering,Westlake University,Hangzhou,China

出　　处：《International Journal of Mechanical System Dynamics》2024年第4期387-405,共19页国际机械系统动力学学报(英文)

摘　　要：This paper aims to analyse the free vibrations of doubly curved imperfect shear deformable functionally graded material microshells using a five-parameter shear deformable model.Porosity is modeled via the modified power-law rule by a logarithmicuneven variation along the thickness.Coupled axial,transverse,and rotational motion equations for general doubly curved microsystems are obtained by a virtual work/energy of Hamilton's principle using a modified first-order shear deformable theory including small size dependence.The modal decomposition method is then used to obtain a solution for different geometries of microshells:spherical,elliptical,hyperbolic,and cylindrical.A detailed study on the influence of material gradation and porosity,small-length scale coefficient,and geometrical parameters on the frequency characteristics of the microsystem is conducted for different shell geometries.

关 键 词：functionally graded materials MICROSHELLS POROSITY vibrations 

分 类 号：O17[理学—数学]