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wave protection Effect of Periodic Row of Bottom-Hinged Flap-Type wave Energy Converters

Transactions of Tianjin University 2016年第6期22卷 563-571页

作者：王冬姣邱守强叶家玮梁富琳 School of Civil Engineering and Transportation South China University of Technology Guangzhou 510640 China

A flap-type wave energy converter(WEC) is combined with a nearshore breakwater to expand the application of WECs both economically and environmentally. Based on the linear potential theory, an eigenfunction expansion solution is developed for a periodic row of bottom-hinged flap-type WECs exposed to normal waves. Additionally, the viscous effect is considered using the ship rolling solution method with a viscous damping term included in the equation of motion, and the viscous damping expression is also described. The proposed solution is verified by comparison with published literatures. The results including the wave energy conversion efficiency, the reflected and transmitted proportion of the incident wave energy are presented for a range of wave periods and geometric ratios. It is demonstrated that better wave protection effects can be attained with smaller gaps between the WECs, where the transmitted proportion of the incident wave energy is lower. An optimal geometric ratio thus exists for a given wave power absorption and a specific wave period.

关键词： wave energy converter bottom-hinged flap eigenfunction expansion wave protection

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Design of Distorted wave protection Armor Units

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China Ocean Engineering 1992年第4期7卷 445-454页

作者： Lou Hongen Senior Engineer, Nanjing Hydraulic Research Institute, 210029, Nanjing Nanjing Hydraulic Research Institute 210029 Nanjing China China

In consideration of the global optimization for engineering projects, a group of calculation formulas have been derived by means of theoretical derivation and model tests. On this basis, a design procedure for the distorted units is proposed, by means of which the distorted units of an anology shape and an identical porosity ratio with the original units can be obtained after conducting a distorted enlargement and a normal contraction. The stability waveheight and stability factor of the distorted unit can be calculated with the enlargement factor, a, of the horizontal dimension of the distorted unit, or with the contraction scale, A , of the contracted distorted unit. As a result, the stability of the armor unit can be significantly improved without increasing the quantity of concrete. For the same wave met by the original units, the thickness of placement of the contracted distorted unit can be obviously reduced, thus, a large quantity of concrete can be saved, consequently, economic benefit can be achieved.

关键词： armor unit breakwater design structure wave protection

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