Creating and Verifying a Research-Grade Simply Supported Cylinder with Pzt Actuation

ISSN： 0022-460X

Source： Journal of Sound and Vibration, Vol.228, Iss.5, 1999-12, pp. : 961-975

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Abstract

In many aerospace and structural applications, idealized cylinders are used to approximate more complex structures such as airplane fuselages and rocket payload fairings. Many authors have created sophisticated models of the structural response of cylinders excited by a variety of actuators. However, these models are seldom verified experimentally. None of the models created to describe the response of a simply supported (SS) cylinder have ever been verified. In this work several different boundary conditions are created to approximate an ideal SS cylinder. The different boundary conditions tested are described and compared with finite-element analysis (FEA) and with an impedance-based analytical model for a piezoelectric actuator (PZT) exciting a SS cylinder. The work presented describes the steps taken in creating a physical boundary condition whichapproximates the ideal boundary condition for a SS cylinder and also evaluates the response of the impedance model for a PZT exciting a SS cylinder. The results indicate that the created physical boundary condition resembles the ideal SS boundary condition. The structural response computed by the impedance model is also shown to agree with the experiment and with the FEA. The results can be used to create other experimental SS cylinders and can also be used in modelling more complicated aerospace structures.