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| Vibration Characteristics of Cylindrical Shell treated with Active Constrained Layer Damping |
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Abstract A finite element dynamic model for cylindrical shell treated with active constrained layer damping (ACLD) is established based on the constitutive equations of elastic, viscoelastic and piezoelectric materials by energy approach . The proportion and differential control system considering the self-sensing voltage from the sensor layer is developed. The active constrained layer damping (ACLD) shells including nature frequencies, loss factors and responses in frequency domain are investigated. The influence of some key parameters, such as the covering ratio of ACLD patches, the thickness of VEM and the control gains, on the shell vibration characteristics is discussed. The results show that ACLD patches should be bonded on the different locations on the surface of the cylindrical shell in order to surpress vibration for different modes; the covering ratio of ACLD patches, the thickness of VEM and control gains have direct effect on the vibration amplitude. The Optimization of these parameters including the placement of ACLD patches, the covering ratio of ACLD patches, the thickness of VEM and control gains in ACLD technique can effectively surpress the vibration of cylindrical shells. Therefore, the ACLD technique demonstrates the potential applications in engineering.
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Received: 22 August 2010
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2011, Vol. 32 
