کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7175979 | 1466593 | 2015 | 19 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Vortex-induced vibrations of elastically mounted circular cylinder at Re of the O(105)
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی مکانیک
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چکیده انگلیسی
In the field of fluid structure interaction and offshore engineering, vortex induced vibrations (VIV) have been a highly researched topic over a last few decades. There is a continuous need to understand the magnitude of peak oscillations and force-phase relationship, possible under all forcing conditions. Considering this fact, and bearing in mind that in practical situations, cylindrical structures are subjected to water currents corresponding to high Re. Present study is focused on the VIV in regimes of high Re beyond 105. Measurements were made in a towing tank facility, for mass ratio mâ=0.87-2.52; damping ratio ζ=0.058-0.066; and mâζ=0.05-0.166. Displacement measurements together with force coefficients in the transverse direction and the phase relationship between force and displacement were also investigated. An attempt has been made to capture hysteresis as part of the main objective of the study. The present investigation sheds new light in the VIV response of the cylinder in terms of its dependence on reduced velocity (Ur) and hysteretic response. There is a need to include the effects of high Re in predictive relationships for maximum amplitude response (Ymax). A new equation is proposed for Ymax including the effects of α=[(mâ+CA)ζ] and Re which appears to be better than the only other available approach in the literature.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Fluids and Structures - Volume 54, April 2015, Pages 503-521
Journal: Journal of Fluids and Structures - Volume 54, April 2015, Pages 503-521
نویسندگان
K. Narendran, K. Murali, V. Sundar,