Simulation Research On Active Vibration Control Of Piezoelectric Cylindrical Shell

The cylindrical shell structure is used in torpedoes and other underwater vehicles.Flank array sonar is a large passive sonar that is placed on both sides of the structure surface.In actual work,the structure is excited to generate vibration.Sonar’s ability to receive and send signals will be disturbed by this vibration.Piezoelectric materials have good forward and reverse piezoelectric effects,and are widely used as ideal materials for active control of structural vibration.Based on ANSYS simulation,this paper calculates the active vibration control of the distributed piezoelectric actuator cylindrical shell structure in air and underwater,and obtains the optimized parameters of the piezoelectric actuator size and the vibration level attenuation after active control.First,in theory,active control of piezoelectric cylindrical shell is discussed.Briefly describes the basics of fluid mechanics,fluid motion equations andk-?standard models are given.In view of the regular shape of the research object,the Donnell shell theory was selected,and the active control mechanism of the structure of the pasted piezoelectric material was derived through the variational equation and the Hamilton principle.The comparison of existing data proves the feasibility of ANSYS piezoelectric active control.Secondly,the active control of the vibration of the cylindrical shell by distributed piezoelectric actuators in air is studied.According to the deployment position of the piezoelectric actuator,the layout of the flank array and the arrangement of the vibration wave propagation direction are designed with two schemes.Based on the research results,the scheme of vibration wave propagation direction is further refined,and the effect of active vibration control by controlling only piezoelectric actuator 1and controlling three piezoelectric actuators is compared.Optimize the dimensional parameter design of the actuator 1 to obtain the optimal dimensional parameter for active control.Finally,the active control of the vibration of the cylindrical shell by the underwater distributed piezoelectric actuator is studied.Based on the fluid-structure coupling,the optimal design of the size parameters of the underwater piezoelectric actuator is compared.The optimization results of the underwater and air are compared,and found the optimization results of the size parameters in the air have guiding role.At the same time,the results of active vibration control of the structure in static water and at different speeds are simulated and calculated separately.