Thermally induced vibration control of composite plates and shells with piezoelectric active damping

Raja, S and Sinha, PK and Prathap, Gangan and Dwarakanathan, D (2006) Thermally induced vibration control of composite plates and shells with piezoelectric active damping. Smart Materials and Structures, 13 (4). pp. 939-950. ISSN 0964-1726

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A coupled piezoelectric field is modelled with an expansion strain in the numerical formulation to analyse piezohygrothermoelastic laminated plates and shells. Finite element actuator and sensor equations are derived using a nine-noded field consistent shallow shell element. Thermally induced vibration control is attempted using piezoelectrically developed active damping. The influence of piezoelectric anisotropy on active damping is evaluated, adopting a simple modelling technique. With 40% reduced actuation capability in the lateral direction, the directionally active lamina is observed to be equally efficient in controlling the vibration. In general, the directionally active lamina is efficient if the primary actuation direction is oriented along the fibre direction or in the direction of bending. The directional actuation appeared to be more effective in the velocity feedback control for cantilevered plates and shells. However, in the simply supported case, a balanced actuation effort is required to provide better controllability, which can be achieved by tailoring the directional actuation. The importance of geometric curvature for the actuator performance is also highlighted.

Item Type: Article
Uncontrolled Keywords: Composite materials;Shells (structures);Piezoelectric devices;Damping;Strain;Actuators;Sensors;Anisotropy;Numerical analysis;Mathematical models
Subjects: ENGINEERING > Structural Mechanics
Depositing User: Mrs Manoranjitha M D
Date Deposited: 28 Mar 2007
Last Modified: 24 May 2010 04:25

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