RESEARCH PAPERS: Design Automation Papers

Optimum Design of Internal Strain-Gage Balances: An Example of Three-Dimensional Shape Optimization

[+] Author and Article Information
J. W. Hou, S. L. Twu

Department of Mechanical Engineering and Mechanics, School of Engineering, Old Dominion University, Norfolk, VA 23508

J. Mech., Trans., and Automation 109(2), 257-262 (Jun 01, 1987) (6 pages) doi:10.1115/1.3267448 History: Received July 09, 1986; Online November 19, 2009


Internal strain-gage balances are often applied to measure the aerodynamic loads acting on the aircraft model in the wind-tunnel test. The balance system consists essentially of one main body and two shoulders elastically interconnected by multibar cages. Designing the cross-sectional geometry of such a multibar cage balance to improve the accuracy of load measurement is an important task for a balance engineer. The study presents an initial attempt to carry out such a design task in a systematic and automated manner. This is achieved by considering two aspects. One is to establish a mathematical model to analyze the stress distribution in the elastic cage and the other is to adopt a three-dimensional shape optimization scheme to design the cross-sectional geometry of the internal strain-gage balance. The design procedure has been completely automated in a computer program. Numerical examples shows that the proposed numerical scheme performs very well.

Copyright © 1987 by ASME
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