Transactions of Nanjing University of Aeronautics & Astronautics
Passive Perforated Pipe Control Method for Wind-Induced Vibration of a High-Rise Chemical Tower
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Abstract:
Vortex-induced vibration is likely to occur when subjected to wind loads because of low horizontal stiffness, resulting in internal force and large lateral amplitude. Long-term wind-induced vibration can not only affect the normal service and durability performance of chemical towers, but also seriously endanger the safety of towers in service periods, and cause property losses. In this study, a passive control method for suppressing wind-induced vibration of chemical towers is proposed. The flow around the flow field is guided by a pre-set air-blowing channel, thus destroying the unsteady vortex shedding in the wake region of the flow field and achieving the purpose of flow control. Two accelerometers are used to measure the vibration signal of the chemical tower model with and without the perforated pipe. The control effects of the spacing and the installation position of the perforated pipe are then studied. Experimental results show that the passive perforated pipe control method can effectively reduce the vibration amplitude of the chemical tower under wind loads, and decrease the potential wind-induced vibration.
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Clc Number:
TU276.7
CHINA AERO-SCIENCES
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