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Static calibration and dynamic behaviour of a six-component force balance for variable pressure water tunnel facilities

Butler, D, Smith, SM, Brandner, PA ORCID: 0000-0002-6721-878X, Clarke, DB and Pearce, BW ORCID: 0000-0003-2189-5598 2021 , 'Static calibration and dynamic behaviour of a six-component force balance for variable pressure water tunnel facilities' , Experimental Techniques, vol. 45, no. 2 , pp. 157-167 , doi: 10.1007/s40799-020-00407-3.

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Abstract

The presented six component force balance is a novel design used for many of the force measurements on hydrofoils and other bodies in the University of Tasmania's cavitation tunnel. This balance is a versatile piece of equipment, the distribution of its six load cells gives it a high degree of sensitivity and stiffness in all directions. The accuracy of the balance in operating conditions has yet to be defined and its use for investigations of low frequency fluid-structure interactions warrants an analysis of its dynamic properties. This paper outlines a critical analysis of the balances calibration methodologies and its measurement uncertainties. A dynamic vibration model was built and validated with finite element modelling and experiment to give a prediction of the force balances natural frequencies and how they change with different test article mass and added masses. These results provide confidence in the data produced by this device and guide future experimental investigations into fluid structure interactions.

Item Type: Article
Authors/Creators:Butler, D and Smith, SM and Brandner, PA and Clarke, DB and Pearce, BW
Keywords: force balance, cavitation tunnel, calibration, static, dynamic, six-component
Journal or Publication Title: Experimental Techniques
Publisher: Soc Experimental Mechanics
ISSN: 0732-8818
DOI / ID Number: 10.1007/s40799-020-00407-3
Copyright Information:

© Crown 2021

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