▎ 摘　　要

As a first endeavor, the dynamic analysis of functionally graded graphene nanoplatelets reinforced composite (FG-GNPRC) cylindrical nanoshell subjected to a moving harmonic load is investigated. The effective mechanical properties of the nanocomposite are found using the Halpin-Tsai model and a modified rule of mixture. The equations of motion for the structure resting on an elastic foundation are derived based on first order shear deformation theory (FSDT) in conjunction with the nonlocal strain gradient theory (NSGT) via Hamilton's principle. Accordingly, the shear deformation, rotary inertia, softening-stiffness and stiffness-enhancement effects are considered. Afterwards, a time-dependent system of state-space is solved for the dynamic analysis of the structure with simply supported boundary conditions. After validating the approach, some novel results are prepared to investigate the impact of size-dependent effects, weight fraction index and the total number of layers of GNPs, elastic foundation parameters, and exciting frequency on the forced vibration of FG-GNPRC cylindrical nanoshells under harmonic moving load through variations in load velocity as well as time history. (C) 2020 Elsevier Ltd. All rights reserved.