An Experimental Study on the Use of Active Constrained Layer Damping for Thin Curved Smart Shell Structures

Abstract:

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Thin Open Curved Shell Structures constitute the major building block of many critical structures such as Aircraft Cabins, Ship Hulls and bodies of rockets and missiles. In the present work, an open thin curved shell made of Aluminium material has been chosen to investigate the potential of ACLD effectiveness with MFC Actuator. The shell ACLD system has been modelled using system identification method and converted into state space form for designing the control law of the LQR controller. Finite Element Analysis of the bare structure has been performed in ANSYS. Using modal solution results, the best possible location for the placement of patches has been found out for combined vibration control of first three modes using Modal Strain Energy (MSE) approach. The FEA Modal Solution results have been correlated with the experimental modal analysis results obtained with the help of ICATS (Imperial College’s Modal Analysis and Testing Software). Significant vibration attenuation resulted for partially covered PCLD and ACLD treatments on open curved shell. Thus, ACLD provides a practical means for controlling the vibration of complex structures such as an open curved shell with currently available piezoelectric (MFC) actuators without the need for excessively large actuation voltages.

Info:

Periodical:

Edited by:

Pietro VINCENZINI and Fabio CASCIATI

Pages:

309-314

DOI:

10.4028/www.scientific.net/AST.56.309

Citation:

P. Saini et al., "An Experimental Study on the Use of Active Constrained Layer Damping for Thin Curved Smart Shell Structures", Advances in Science and Technology, Vol. 56, pp. 309-314, 2008

Online since:

September 2008

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$35.00

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