کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5473580 | 1520435 | 2017 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Theoretical and numerical investigations of wave resonance between two floating bodies in close proximity
ترجمه فارسی عنوان
بررسی های نظری و عددی رزونانس موج بین دو جسم شناور در نزدیکی نزدیک
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کلمات کلیدی
موج آب، فاصله باریک، رزونانس مایع، اتلاف انرژی، دمیدن مصنوعی،
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی دریا (اقیانوس)
چکیده انگلیسی
A simple theoretical dynamic model with a linearized damping coefficient is proposed for the gap resonance problem, as often referred to as the piston mode wave motion in a narrow gap formed by floating bodies. The relationship among the resonant response amplitude and frequency, the reflection and transmission coefficients, the gap width, and the damping coefficient is obtained. A quantitative link between the damping coefficient of the theoretical dynamic model (É) and that devised for the modified potential flow model (up) is established, namely, up = 3ÏÉÏ (where Ïn is the natural frequency). This link clarifies the physical meaning of the damping term introduced into the modified potential flow model. A new explicit approach to determine the damping coefficient for the modified potential model is proposed, without resorting to numerically tuning the damping coefficient by trial and error tests. The effects of the body breadth ratio on the characteristics of the gap resonance are numerically investigated by using both the modified potential flow model and the viscous RNG turbulent model. It is found that the body breadth ratio has a significant nonlinear influence on the resonant wave amplitude and the resonant frequency. With the modified potential flow model with the explicit damping coefficient, reasonable predictions are made in good agreement with the numerical solutions of the viscous fluid model.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hydrodynamics, Ser. B - Volume 29, Issue 5, October 2017, Pages 805-816
Journal: Journal of Hydrodynamics, Ser. B - Volume 29, Issue 5, October 2017, Pages 805-816
نویسندگان
Lei (è°é·), Guo-qiang (åå½å¼º), Zhong-bing (å¨å¿ å
µ), Liang Cheng, Xiaobo Chen, Lin (åæ),