A smart model of a long-span suspended bridge for wind tunnel tests

S. Cinquemani; G. Diana; L. Fossati; F. Ripamonti

doi:10.1117/12.2082886

2 April 2015 A smart model of a long-span suspended bridge for wind tunnel tests

S. Cinquemani, G. Diana, L. Fossati, F. Ripamonti

Proceedings Volume 9431, Active and Passive Smart Structures and Integrated Systems 2015; 94311Z (2015) https://doi.org/10.1117/12.2082886
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2015, San Diego, California, United States

Abstract

Traditional aeroelastic models rely only on good mechanical design and accurate crafting in order to match the required structural properties. This paper proposes an active regulation of their structural parameters in order to improve accuracy and reliability of wind tunnel tests. Following the design process steps typical of a smart structure, a damping tuning technique allowing to control a specific set of vibration modes is developed and applied on the aeroelastic model of a long-span suspended bridge. Depending on the testing conditions, the structural damping value can be adjusted in a fast, precise and repeatable way in order to highlight the effects of the aerodynamic phenomena of interest. In particular, vortex-induced vibration are taken into consideration, and the response of a bridge section to vortex shedding is assessed. The active parameter regulation allows to widen the pattern of operating conditions in which the model can be tested. The paper discusses the choice of both sensors and actuators to be embedded in the structure and their positioning, as the control algorithm to obtain the desired damping. Experimental results are shown and results are discussed to evaluate the performance of the smart structure in wind dunnel tests.

Citation Download Citation

S. Cinquemani, G. Diana, L. Fossati, and F. Ripamonti "A smart model of a long-span suspended bridge for wind tunnel tests", Proc. SPIE 9431, Active and Passive Smart Structures and Integrated Systems 2015, 94311Z (2 April 2015); https://doi.org/10.1117/12.2082886

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KEYWORDS

Bridges

Smart structures

Control systems

Wind measurement

Actuators

Aerodynamics

Sensors

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