کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1725438 | 1520687 | 2015 | 15 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Experimental study of the effects of surface roughness on the vortex-induced vibration response of a flexible cylinder
ترجمه فارسی عنوان
بررسی تجربی اثر ناهمواری سطح بر پاسخ ارتعاش ناشی از گرداب یک سیلندر انعطاف پذیر
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کلمات کلیدی
ارتعاش ناشی از باد زبری سطح، مطالعه تجربی، منطقه قفل،
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی دریا (اقیانوس)
چکیده انگلیسی
The effects of surface roughness on the vortex-induced vibration (VIV) of a flexible cylinder have been studied experimentally. The drag, lift, tension, vortex-shedding frequency, vibration frequency, and displacement response of cylinders with different roughnesses are compared. The results indicate that a pure VIV lock-in phenomenon occurs in the in-line direction earlier than in the cross-flow direction, and thus the VIV response in the in-line direction is larger than in the cross-flow direction in the low-reduced-velocity range. The tension in the cylinder has two peak frequencies. One peak is the dominant frequency, which coincides with the dominant frequency of the drag and is induced by the VIV in the in-line direction. The other peak is at half of the dominant frequency, at the dominant frequency of the lift; it is caused by the VIV in the cross-flow direction. Rough cylinders have a smaller displacement response, a narrower lock-in region, and a higher vortex-shedding frequency than a smooth cylinder.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ocean Engineering - Volume 103, 15 July 2015, Pages 40-54
Journal: Ocean Engineering - Volume 103, 15 July 2015, Pages 40-54
نویسندگان
Yun Gao, Shixiao Fu, Jungao Wang, Leijian Song, Yifan Chen,