Dynamic Characteristics And Vibration Reduction Analysis Of Multi-field Coupled Viscoelastic Axial Moving Plates

Plate structure is widely used in mechanical transmission,aerospace,automotive,high-speed trains,rail transit and other fields.Due to the presence of factors such as speed of movement,for example,the viscoelastic moving plate structure in mechanical transmission can be modeled by the axial moving continuum.The dynamic behavior of the axial motion system is also very rich,the aero-dynamic environment such as flight by axial viscoelastic materials under the aircraft structure will be affected by elastic force,inertia force and heat load and under the action of aerodynamic force will produce larger transverse vibration.Therefore,the research and control of transverse vibration of moving structure is an important research topic,which has important engineering and practical significance.This article first studied in pneumatic thermal environment and under the transverse vibration,based on Karman nonlinear constitutive theory and linear potential flow theory,considering the surface heat load and the perturbation pressure influence on axial movement transverse bending deflection,the governing equation of vibration of axially moving viscoelastic plate is established,using the assumption mode method and Hamiltonian method was studied by the numerical simulation of axial movement vibration characteristics.Secondly,nonlinear energy sink(Hereinafter referred to as the NES)are installed on viscoelastic axial moving plates.Through numerical simulation,nonlinear differential equations are approximately analyzed to obtain analytical solutions of displacement time response of plates.The influences of air velocity,external temperature and NES geometric parameters on vibration characteristics of plates are analyzed.Finally,the harmonic balance method was used to approximate the analytical solution of the control equation,The influence of amplitude frequency response curve on NES parameters was analyzed.Numerical and analytical solutions are compared to verify the accuracy of the method.The results show that,within the given geometric parameters,NES can achieve a good vibration suppression effect on the transverse vibration of the plate and realize the vibration suppression function.