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Curved piezoactuator model for active vibration control of cylindrical shells
Recent advances in piezoelectric materials for actuation and sensing of structural motion have generated a strong interest in active structural acoustic control. It is known that curvature causes significant coupling between in-plane and out-of-plane motions and that the magnitude of the piezoactuator force is a function of the substructure properties. Thus, for applications related to active noise and vibration control problems, such as in aircraft, submarines, compressor shells, etc., a piezoactuator model needs to be developed that incorporates the effect of substructure curvature. In this investigation, a composite differential equation of motion for the curved piezoactuators and shell system was derived, and approximate analytical expressions for the equivalent forces exerted by the actuators on the shell were obtained. Transverse shear stresses were neglected based on previous flat actuator results, and also edge effects were assumed negligible for most of the actuator patch because of the small thickness. The in-phase configuration was studied. The piezoactuators exert x and Theta line forces and a uniform pressure load over the patch for in-phase configuration. The in-phase forces show a saturation behaviour with increase in thickness.
Curved piezoactuator model for active vibration control of cylindrical shells
Recent advances in piezoelectric materials for actuation and sensing of structural motion have generated a strong interest in active structural acoustic control. It is known that curvature causes significant coupling between in-plane and out-of-plane motions and that the magnitude of the piezoactuator force is a function of the substructure properties. Thus, for applications related to active noise and vibration control problems, such as in aircraft, submarines, compressor shells, etc., a piezoactuator model needs to be developed that incorporates the effect of substructure curvature. In this investigation, a composite differential equation of motion for the curved piezoactuators and shell system was derived, and approximate analytical expressions for the equivalent forces exerted by the actuators on the shell were obtained. Transverse shear stresses were neglected based on previous flat actuator results, and also edge effects were assumed negligible for most of the actuator patch because of the small thickness. The in-phase configuration was studied. The piezoactuators exert x and Theta line forces and a uniform pressure load over the patch for in-phase configuration. The in-phase forces show a saturation behaviour with increase in thickness.
Curved piezoactuator model for active vibration control of cylindrical shells
Gekrümmtes Piezo-Stellantriebs-Modell für die aktive Schwingungsregelung von Zylinderschalen
Sonti, V.R. (author) / Jones, J.D. (author)
AIAA Journal ; 34 ; 1034-1040
1996
7 Seiten, 9 Bilder, 18 Quellen
Article (Journal)
English
Schwingungsdämpfung , Steuerungs- und Regelungssystem , piezoelektrisches Bauelement , Stellantrieb , Krümmung , Zylinderschale , mathematisches Modell , Differenzialgleichung , Kleben (Verbinden) , Stellgröße , Druckkraft , Dicke , aktive Schalldämpfung , Flugzeug , U-Boot , Verdichter , Elastizität , Bewegungsgleichung
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