Vibration Control of Cylindrical Shell Partially Treated with Active Lami-nated Polyvinglidene Fluoride

Constrained Layer Damping

ZHANG Yahong  NIU Hongpan  ZHANG Xinong  XIE Shilin

(Minstry of Education Key Laboratory for Strength and Vibration, Xi’an Jiaotong University, Xi’an 710049)

Abstract: Vibration control of cylindrical shell partially treated with the active laminated polyvinglidene fluoride(PVDF) constrained layer damping (ALCLD) is investigated. The electromechanically coupled equations of the system considered are derived by using Hamilton’s principle. The analytic formulae of actuating forces produced by ALCLD are obtained. The vibration control is simulated as well for a simply supported cylindrical shell partially treated with ALCLD employing velocity feedback scheme. The results show that the increasing of PVDF layer number can improve significantly the control performance since the acting forces of ALCLD are linear with the PVDF layer number. Consequently, the vibration of the shell can be suppressed well under low control voltage using ALCLD of the larger PVDF layer number. The actuating force in radial direction, which is very effective to control the transverse vibration of the shell, is induced in the case of PVDF layer bounding on the surface of shell.

Key words: Cylindrical shell  Active laminated polyvinylidene fluoride constrained layer damping  Vibration control

CLC No: TB535 TH113

国家自然科学基金(50275114)和教育部重点资助项目. Received 20070407, received in revised form 20071115

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