Piezoelectric Shunt Damped Vibration Control Of Lattice Sandwich Beams Actuated By Aerodynamics

With the complexity of the structure design of aerospace vehicles,the requirement for the performance of aircraft is becoming higher and higher.Especially for the flight speed of aircraft,the traditional low-speed aircraft has been far from meeting all kinds of human needs.With the continuous progress of science and technology,supersonic and hypersonic aircraft emerge at the historic moment,but the aeroelastic problems also arise.This is because the aircraft is affected by aerodynamic forces during flight,which will cause the elastic deformation of the structure of the aircraft itself.This elastic deformation in turn changes the aerodynamic forces,and then leads to further elastic deformation.This constitutes a so-called aeroelastic phenomenon of the interaction between structural deformation and aerodynamic forces.The aeroelastic problem comes down to the conclusion.The bottom is the coupling between force and force.Aerodynamic elasticity has a significant impact on the maneuverability and stability of aircraft.In this paper,the passive vibration control of Lattice Sandwich Beams Subjected to aerodynamic forces is studied.In the second chapter,the kinematics model of pyramid Lattice Sandwich Beams with piezoelectric patches is established.The bending deformation of upper and lower panels and piezoelectric patches and the shear deformation of the core layer are taken into account in the process of modeling.The assumed mode method and Hamilton principle are used to establish the motion equation of the system.Finally,the motion of pyramid Lattice Sandwich Beams with piezoelectric patches is obtained by variational calculation.Learning equation.In the third chapter,based on the pyramid lattice sandwich beam model with piezoelectric patches in Chapter 2,the aerodynamic force is added to the model.The unsteady aerodynamic force is simulated by supersonic piston theory.By changing the aerodynamic force,the influence of aerodynamic force on the natural frequency,displacement and angular velocity of the pyramid lattice sandwich beam is observed in the simulation process of MATLAB.Chapter 4 mainly uses piezoelectric shunt damper to control vibration,which mainly uses piezoelectric material to convert mechanical energy into electrical energy,and then uses the shunt circuit to consume this part of energy,so as to achieve the effect of vibration suppression.Finally,the numerical simulation of MATLAB is carried out to verify the effect of vibration suppression.