CROSS-FLOW VIBRATIONS OF CYLINDER IN IRREGULAR OSCILLATORY FLOW

This study presents the results of an experimental work with a spring-supported cylinder exposed to irregular oscillatory flow. The steady current and regular-oscillatory-flow cases are also included for reference purpose. The oscillatory- flow conditions are created by the so-called carriage technique. The cross-flow response of the cylinder has been investigated for the Keulegan-Carpenter numbers equal to 10, 20, and 36, and for the reduced velocity from 0 to 11.5. The effect of the width of the flow-velocity spectrum on the cylinder response was studied. The results show that the cylinder vibrations under irregular-oscillatory flow conditions differ considerable from the response in the regular oscillatory flow. First of all, the cylinder responds mostly with its natural frequency. Second, vibration amplitudes are considerably reduced. Third, the vibrations are initiated earlier (ie, at smaller values of the reduced velocity) than in regular oscillatory flow.

• Supplemental Notes:
  • J Waterway, Port Coastal and Ocean Engng, v 120 n 6, Nov/Dec 1994, p 515 [20 p, 22 ref, 3 tab, 10 fig]
• Authors:
  • Kozakiewicz, A
  • Sumer, B M
  • Freds e, J
• Publication Date: 1994

Language

• English

Subject/Index Terms

• TRT Terms: Vibration
• Uncontrolled Terms: Cylinders
• Old TRIS Terms: Cross flow; Oscillating flow
• Subject Areas: Marine Transportation;

Filing Info

• Accession Number: 00709803
• Record Type: Publication
• Source Agency: British Maritime Technology
• Files: TRIS
• Created Date: Aug 14 1995 12:00AM