Delamination of surface accretions with structural waves: piezo-actuation and power requirements
Delamination of surface accretions with structural waves: piezo-actuation and power requirements
Unwanted accretions on structures, such as aircraft and wind turbine icing or deposits in pipes, are a common problem, which can pose a serious safety threat if not treated effectively and punctually. In this paper we investigate the capability of piezo-excited structural waves for delaminating accreted material. The core of the concept is to utilise the stress distribution associated with waves propagating through the structure to detach unwanted build-up. We apply a wave-based technique for modelling piezoelectric excitation based on semi-analytical finite elements to calculate the shear stress at the interface between the host structure and the accretion generated by piezoactuated waves. Our analyses include the effects of the actuator’s dynamics and allow for comparing different types of actuators, identifying the most effective frequency of excitation and formulating realistic power requirements. For the dual purpose of proof of concept and validation of the model, we present a demonstration experiment in which patches of accreted material are removed from a beam-like waveguide with emulated anechoic terminations using ultrasonic excitation.
1454-1471
Kalkowski, Michal
6f0d01ef-7f44-459c-82a2-03f9e1275eda
Waters, Timothy
348d22f5-dba1-4384-87ac-04fe5d603c2f
Rustighi, Emiliano
9544ced4-5057-4491-a45c-643873dfed96
July 2017
Kalkowski, Michal
6f0d01ef-7f44-459c-82a2-03f9e1275eda
Waters, Timothy
348d22f5-dba1-4384-87ac-04fe5d603c2f
Rustighi, Emiliano
9544ced4-5057-4491-a45c-643873dfed96
Kalkowski, Michal, Waters, Timothy and Rustighi, Emiliano
(2017)
Delamination of surface accretions with structural waves: piezo-actuation and power requirements.
Journal of Intelligent Materials Systems and Structures, 28 (11), .
(doi:10.1177/1045389X16672567).
Abstract
Unwanted accretions on structures, such as aircraft and wind turbine icing or deposits in pipes, are a common problem, which can pose a serious safety threat if not treated effectively and punctually. In this paper we investigate the capability of piezo-excited structural waves for delaminating accreted material. The core of the concept is to utilise the stress distribution associated with waves propagating through the structure to detach unwanted build-up. We apply a wave-based technique for modelling piezoelectric excitation based on semi-analytical finite elements to calculate the shear stress at the interface between the host structure and the accretion generated by piezoactuated waves. Our analyses include the effects of the actuator’s dynamics and allow for comparing different types of actuators, identifying the most effective frequency of excitation and formulating realistic power requirements. For the dual purpose of proof of concept and validation of the model, we present a demonstration experiment in which patches of accreted material are removed from a beam-like waveguide with emulated anechoic terminations using ultrasonic excitation.
Text
Kalkowski JIMSSR1.pdf
- Accepted Manuscript
More information
Accepted/In Press date: 12 September 2016
e-pub ahead of print date: 3 November 2016
Published date: July 2017
Organisations:
Inst. Sound & Vibration Research, Dynamics Group
Identifiers
Local EPrints ID: 401527
URI: http://eprints.soton.ac.uk/id/eprint/401527
ISSN: 1045-389X
PURE UUID: 0f4010fa-e8a1-4a8c-9aa2-29601d490482
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Date deposited: 13 Oct 2016 14:08
Last modified: 15 Mar 2024 05:58
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