کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5473299 | 1520238 | 2017 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Flow-induced vibration analysis of elastic propellers in a cyclic inflow: An experimental and numerical study
ترجمه فارسی عنوان
تجزیه و تحلیل ارتعاش ناشی از جریان از پروانه های الاستیک در یک جریان چرخه ای: یک مطالعه تجربی و عددی
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کلمات کلیدی
ارتعاش ناشی از جریان، پروانه دریایی، اندازه گیری شتاب، نوسانات فشار، شبیه سازی گردابی بزرگ،
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی دریا (اقیانوس)
چکیده انگلیسی
In this paper, the flow-induced vibrations of marine propellers in cyclic inflows are investigated both experimentally and numerically. A Laser-Doppler velocimetry (LDV) system is used to measure the axial flow velocity distributions produced by the seven-cycle wake screen in the water tunnel. A customized underwater slip ring and a single axis accelerometer sealed by silicon sealant are employed to measure the acceleration responses of rotating propeller blade. Numerical simulations of pressure fluctuations on the blades are performed using large eddy simulation (LES), while the forced vibrations of the propeller blades are obtained by a combined finite element and boundary element method. Experimental and numerical results are presented for two model propellers with the same geometries and different flexible properties, which show that the propeller blade vibrates at a frequency which is seven times as large as the axial passing frequency (APF) in the seven-cycle inflow. Moreover, the propeller blades are observed to resonance when the 7 APF excitation frequency is equal to the fundamental frequency of the propellers. The results indicate that both the inflow feature and the modal characteristic of blades contribute to flow-induced vibrations of elastic propellers.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Ocean Research - Volume 65, April 2017, Pages 47-59
Journal: Applied Ocean Research - Volume 65, April 2017, Pages 47-59
نویسندگان
Jin Tian, Zhenguo Zhang, Zhen Ni, Hongxing Hua,