Nonlinear Dynamics and Vibration Suppression of Graphene Platelets Reinforced Pipes Conveying Fluid

Purpose: This study investigates the nonlinear dynamical behavior and vibration suppression of multilayer graphene platelets (GPLs) in a composite structure (GPLRC) pipes conveying fluid are investigated in this paper. Methods: Governing equations for GPLRC pipes conveying fluid are derived based on von-Karman nonlinear strain displacement and Hamilton’s principle. The Galerkin method and a fourth-order Runge–Kutta algorithm are adopted to numerically solve the nonlinear dynamical model. Results: The influence of GPLs weight fraction, length-to-thickness ratio, and temperature field on the nonlinear dynamic behavior of GPLRC pipes conveying fluid are investigated. Furthermore, the effect of nonlinear stiffness, damping, inertia component mass, and inertia coefficient of an inertial nonlinear energy sink (NES) on vibration suppression of GPLRC pipes conveying fluid has been explored. Conclusions: Numerical results indicate that the addition of GPLs reinforcement materials effectively suppresses the vibration amplitude of pipes conveying fluid. Increasing the length-to-thickness ratio of GPLs and maintaining a low-temperature environment contribute to weakening chaos and bifurcation in GPLRC pipes conveying fluid. The vibration suppression effect of the inertial NES is positively correlated with its nonlinear stiffness and damping. Optimal vibration suppression is achieved when the inertia mass of the main structure amounts to 10%.