中国海洋工程
http://www.chinaoceanengin.cn/
Contents
http://www.chinaoceanengin.cn//article/id/3b9b925d-454a-42b7-b466-c67b22bcb201
${article.volume}400
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Simulation of the Fate of Faecal Bacteria in Estuarine and Coastal Waters Based on A Fractionated Sediment Transport Model
http://www.chinaoceanengin.cn//article/id/68b08099-a3da-44f1-8e78-185f0f436990
314389395
Chen YANG, Ying LIU
Investigation on the Cavitation Effect of Underwater Shock near Different Boundaries
http://www.chinaoceanengin.cn//article/id/5b506bd0-3244-4199-8e84-2933045c1c19
314396407
Wei XIAO, Hai-peng WEI, Liang FENG
Internal Resonances for Heave, Roll and Pitch Modes of A Spar Platform Considering Wave and Vortex-Induced Loads in the Main Roll Resonance
http://www.chinaoceanengin.cn//article/id/b9301cd8-88ac-4492-8ec9-20195dd306b4
314408417
Wei LI, You-gang TANG, Li-qin LIU, Yan LI, Bin WANG
Three-Dimensional Wave-Induced Current Model Equations and Radiation Stresses
http://www.chinaoceanengin.cn//article/id/636391dc-4bf5-4f96-a235-893fe8786e91
Mellor (2003, 2008), the present paper reports on a repeated effort to derive the equations for three-dimensional wave-induced current. Via the vertical momentum equation and a proper coordinate transformation, the phase-averaged wave dynamic pressure is well treated, and a continuous and depth-dependent radiation stress tensor, rather than the controversial delta Dirac function at the surface shown in Mellor (2008), is provided. Besides, a phase-averaged vertical momentum flux over a sloping bottom is introduced. All the inconsistencies in Mellor (2003, 2008), pointed out by Ardhuin et al. (2008) and Bennis and Ardhuin (2011), are overcome in the presently revised equations. In a test case with a sloping sea bed, as shown in Ardhuin et al. (2008), the wave-driving forces derived in the present equations are in good balance, and no spurious vertical circulation occurs outside the surf zone, indicating that Airy’s wave theory and the approach of Mellor (2003, 2008) are applicable for the derivation of the wave-induced current model.]]>314418427
Hua-yong XIA
3D Effects on Vortex-Shedding Flow and Hydrodynamic Coefficients of A Vertically Oscillating Cylinder with A Bottom-Attached Disk
http://www.chinaoceanengin.cn//article/id/b4164f8e-c02d-4ce0-bb0b-4357e6da056f
D_{d}/D_{c} and thickness ratio t_{d}/D_{c} is studied by a 3D (three-dimensional) numerical model developed in this paper, and compared with the results obtained through 2D (two-dimensional) numerical model. The high-order upwind scheme is applied to stabilize the computation, and convergence is accelerated by the multi-grid method. Qualitative and quantitative analyses of the differences between the 2D and 3D simulation results reveal the 3D effect on the flow field characteristics and hydrodynamic coefficients of the vertically oscillating cylinder with a bottom-attached disk. The 3D effect on the fluid field is mainly reflected in the significance of three vortex-shedding patterns: \begin{document}${\textit{ω} _x}$\end{document} has a greater effect on the flow fields around the sharp edges relative to the vortices generated in the 2D simulation. In the slice along the axial orientation, the vortex effect of \begin{document}${\textit{ω} _y}$\end{document} along the radial axis is smaller than that of \begin{document}${\textit{ω} _x}$\end{document} along the circumferential direction, indicating the radial effect on the velocity more pronounced than the circumferential effect around the sharp edges of the disk. The rotational interaction \begin{document}${\textit{ω} _z}$\end{document} of the fluid in the horizontal plane during the heave motion is insignificant. Based on the 2D and 3D simulation results, the turning points that separate the increasing regimes of the added mass coefficient and damping ratio are identified. The dependence of the turning point on the diameter ratio D_{d}/D_{c} and thickness ratio t_{d}/D_{c} are discussed in detail.]]>314428437
Quan WANG, Yu-feng KOU, Ren-qing ZHU, Hong CHEN
Influences of the Helical Strake Cross-Section Shape on Vortex-Induced Vibrations Suppression for A Long Flexible Cylinder
http://www.chinaoceanengin.cn//article/id/52cef1e0-2c68-4903-a7a3-f3f231722601
314438446
Wan-hai XU, Ying-sen LUAN, Li-qin LIU, Ying-xiang WU
Ince-Strutt Stability Charts for Ship Parametric Roll Resonance in Irregular Waves
http://www.chinaoceanengin.cn//article/id/9fba212e-86a9-4648-acbd-a3136c28eb96
314447457
Xiao ZHANG, He-zhen YANG, Fei XIAO, Pei-ji XU
Wave Power Focusing due to the Bragg Resonance
http://www.chinaoceanengin.cn//article/id/0835b7b4-ea82-4261-a53d-dbb86637e9ae
314458465
Ai-feng TAO, Jin YAN, Yi WANG, Jin-hai ZHENG, Jun FAN, Chuan QIN
Reflection and Transmission of Regular Waves from/Through Single and Double Perforated Thin Walls
http://www.chinaoceanengin.cn//article/id/5d0120f5-6a80-4007-ba7e-436f46da8eb6
314466475
CHIOUKH Nadji, ÇEVIK Esin, YÜKSEL Yalçin
Multiple Tuned Mass Damper Based Vibration Mitigation of Offshore Wind Turbine Considering Soil–Structure Interaction
http://www.chinaoceanengin.cn//article/id/37e8d9a2-a925-40a8-a72d-260d6779361f
314476486
HUSSAN Mosaruf, SHARMIN Faria, KIM Dookie
Research on Bulbous Bow Optimization Based on the Improved PSO Algorithm
http://www.chinaoceanengin.cn//article/id/d4ab006b-553c-4915-a169-8d063292600d
314487494
Sheng-long ZHANG, Bao-ji ZHANG, TEZDOGAN Tahsin, Le-ping XU, Yu-yang LAI
Experimental Study on Flow past A Rotationally Oscillating Cylinder
http://www.chinaoceanengin.cn//article/id/bfd9bc67-40c4-4a29-91d5-060a8e0f12f3
Re=300) placed in a recirculation water channel. A stepper motor was used to rotate the cylinder clockwise- and- counterclockwise about its longitudinal axis at selected frequencies. The particle image velocimetry (PIV) technique was used to capture the flow field behind a rotationally oscillating cylinder. Instantaneous and time-averaged flow fields such as the vorticity contours, streamline topologies and velocity distributions were analyzed. The effects of four rotation angle and frequency ratios F_{r} (F_{r}=f_{n}/f_{v}, the ratio of the forcing frequency f_{n} to the natural vortex shedding frequency f_{v}) on the wake in the lee of a rotationally oscillating cylinder were also examined. The significant wake modification was observed when the cylinder undergoes clockwise-and-counterclockwise motion with amplitude of π, especially in the range of 0.6≤F_{r}≤1.0.]]>314495503
Yang-yang GAO, Chang-shan YIN, Kang YANG, Xi-zeng ZHAO, Soon Keat TAN
Design Tide Hydrograph with A Given Risk Threshold by A Copula-Based Multivariate Method
http://www.chinaoceanengin.cn//article/id/8a893607-03bc-4471-aba9-75922d75c057
T-year design tide hydrograph (DTH). A core innovation is that the proposed technique uses the design risk threshold and copula-based conditional risk probability to analyze the optimal combination of high waters and low waters of the DTH. A brief description of the method is presented. The in situ semi-diurnal tide data at the coast of Jiangsu Province in China are analyzed. Marginal distributions for high waters and low waters of tides are examined. Furthermore, the joint distributions, condition risk probabilities and risk thresholds of high waters and low waters are presented. Results of the DTH from the proposed method are compared with those from the traditional same-multiple enlarging design approach. It is demonstrated that the proposed method is preferable.]]>314504509
Xing YANG, Wei WANG
Power Maximization of A Point Absorber Wave Energy Converter Using Improved Model Predictive Control
http://www.chinaoceanengin.cn//article/id/d90bbe1a-5379-41a8-9533-f7a72a60ea12
314510516
MILANI Farideh, MOGHADDAM Reihaneh Kardehi