功能梯度材料圆柱杆浸入流体中的横振动OA

Based on the 1st-order shear deformation theory(FSDT)and the potential flow theory,the trans-verse vibration of functionally graded material(FGM)cylinder bars dipped in fluid was analyzed.The cermet bar material properties following a power-law distribution along the radial direction were represented by the ra-dial gradient index.The fluid velocity potential and hydrodynamic loads were determined through solution of the Laplace equation in cylindrical coordinates with the variable separation method.The governing equations of mo-tion were derived according to Hamilton's principle.The fundamental frequencies and mode shapes were ob-tained with the generalized differential quadrature(GDQ)method and the direct iteration method.Additionally,the finite element analysis(CEL simulation)was used to validate the numerical results.Through parametric studies,the effects of the length-to-diameter ratio,the gradient index,the boundary conditions,as well as the fluid depth and density,on the transverse vibration behavior of the FGM bar-fluid interaction system were eval-uated.