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Impedance Analytical Method of Wave Run-up and Reflection from A Slotted-Wall Caisson Breakwater 被引量:3
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作者 朱大同 《China Ocean Engineering》 SCIE EI 2010年第3期453-465,共13页
An impedance analytical method (IAM) is developed to study the interaction of plane water wave with a slotted-wall caisson breakwater. The non-linear boundary condition at the slotted-wall is expressed in terms of f... An impedance analytical method (IAM) is developed to study the interaction of plane water wave with a slotted-wall caisson breakwater. The non-linear boundary condition at the slotted-wall is expressed in terms of flow resistance. A set of algebraic expressions are obtained for free surface elevation inside and outside chamber, and reflection coefficient. The prediction of the reflection coefficients shows that the relative widths of the chamber inducing the minimum reflection coefficient for a slotted-wall caisson breakwater are in a range of 0.10~0.20, which are smaller than that (0.15~0.25) for a perforated-wall caisson breakwater. The reflection coefficients and free surface elevation obtained by the present model are compared with that of laboratory experiments carried out by previous researchers. 展开更多
关键词 plane wave slotted-wall caisson wave reflection wave run-up impedance analytical method (IAM)
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Approximate Calculation of Oblique Wave Transmission from A Single-Row of Rectangular Piles 被引量:1
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作者 朱大同 《China Ocean Engineering》 SCIE EI 2012年第2期195-204,共10页
Transmissions of oblique incident wave from a row of rectangular piles are analyzed theoretically. The incident angle of plane wave is taken as g = 90° , there then is the transmission coefficient |T| = 1 (Thi... Transmissions of oblique incident wave from a row of rectangular piles are analyzed theoretically. The incident angle of plane wave is taken as g = 90° , there then is the transmission coefficient |T| = 1 (This is a paradox). In this paper, by means of the approximate relation between the transmitted and incident wave angle found from the shape of a slit, the paradoxical phenomenon is removed. On the basis of the continuality of the pressure and flux and the analysis of flow resistance at the row of rectangular piles, formulas of reflection and transmission coefficients are obtained. The transmission and reflection coefficients predicted by the present model quite agree with those of laboratory experiments in previous references 展开更多
关键词 plane wave row of rectangular piles incident wave angle transmitted wave angle wave transmission coefficients
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Full Wave Solution for Hydrodynamic Behaviors of Pile Breakwater
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作者 朱大同 《China Ocean Engineering》 SCIE EI CSCD 2013年第3期323-334,共12页
Rayleigh expansion is used to study the water-wave interaction with a row of pile breakwater in finite water depth. Evanescent waves, the wave energy dissipated on the fluid resistance and the thickness of the breakwa... Rayleigh expansion is used to study the water-wave interaction with a row of pile breakwater in finite water depth. Evanescent waves, the wave energy dissipated on the fluid resistance and the thickness of the breakwater are totally included in the model. The formulae of wave reflection and transmission coefficients are obtained. The accuracy of the present model is verified by a comparison with existing results. It is found that the predicted wave reflection and transmission coefficients for the zero order are all highly consistent with the experimental data (Hagiwara, 1984; Isaacson et al., 1998) and plane wave solutions (Zhu, 2011). The losses of the wave energy for the fluid passing through slits play an important role, which removes the phenomena of enhanced wave transmission. 展开更多
关键词 full wave theory pile breakwater flow resistance wave reflection wave transmission Rayleigh expansion
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