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SONG Zhiyao XUE Hongchao YAN Yixin
Doctor Senior Engineer College of Harbor Waterway Coastal Engineering Hohai University 《中国海洋工程》1999,(4)
To deal with the problems concerning the shore boundary,moving boundary and engineeringboundary which are encountered frequently in 2D tidal current simulation by the finite difference method,theconcept of line boundary is introduced and studied here,and then the line boundary technique in common useis proposed in this paper.Analysis of some calculation cases shows that this technique is practical,effective,and simple in 2D tidal current simulation involving different boundaries. 相似文献
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Quasi-3D Numerical Simulation of Tidal Hydrodynamic Field 总被引：2，自引：0，他引：2
SONG Zhiyao XUE Hongchao YAN Yixin MAO Lihua XU Fumin
Doctor Senior Engineer College of Harbor Waterway Coastal Engineering Hohai University 《中国海洋工程》1999,(3)
Based on the 2D horizontal plane numerical model,a quasi-3D numerical model is establishedfor coastal regions of shallow water.The characteristics of this model are that the velocity profiles can be ob-tained at the same time when the equations of the value of difference between the horizontal current velocityand its depth-averaged velocity in the vertical direction are solved and the results obtained are consistent withthe results of the 2D model.The circulating flow in the rectangular area induced by wind is simulated and ap-plied to the tidal flow field of the radial sandbanks in the South Yellow Sea.The computational results fromthis quasi-3D model are in good agreement with analytical results and observed data.The solution of the finitedifference equations has been found to be stable,and the model is simple,effective and practical. 相似文献
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ZHANG Hua YU Zhiying JIN Liu
Graduate Student State Key Laboratory of Esturine Coastal Research East China Normal University Shanghai P. R. China
Professor State Key Laboratory of Esturine Coastal Research East China Normal University Shanghai P. R. China
Professor Yangtze Estuary Waterway Construction Co. Ltd. Shanghai P. R. China 《中国海洋工程》1999,(3)
—On the basis of a comparison of the field hydrological,sediment and topographic data observedbefore and after the completion of the West Breakwater in Lianyungang Harbor,which has led to the changeof topography from a strait to a bay,a synthetical analysis is conducted on the change of back siltation.Theresults show that it is the change of coast line and the consequent change of hydrological condition and sedi-ment movement that has led to the change of back siltation in the harbor.This phenomenon is caused by thelag effects of water current,sediment movement and local adjustment of topography after the construction,and it tends to be stable.The results of analysis provide not only a basis for extension of Lianyungang Harborinto a deep water harbor,but also propose a case for the study of the change of back siltation in a harbor onmuddy coast. 相似文献
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XU Fumin
Ph. D. College of Harbor Waterway Coastal Engineering Hohai University Nanjing P. R. China. 《中国海洋工程》1999,(1)
—The maximum entropy principle(MEP)method and the corresponding probability evaluationmethod are introduced,and the maximum entropy probability distribution expression is deduced in mo-ment of the second order.Fully developed wave height distribution in deep water and wave height and peri-od distribution for different depths in wind wave channel experiment are obtained from the MEP method,and the results are compared with the distribution and the experimental histogram.The waveheight and period distribution for the Lianyungang port is also obtained by the MEP method,and the re-sults are compared with the Weibull distribution and the field histogram. 相似文献
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WANG Yuanzhan MENG Qingwen Professor Dept. of Port Waterway Coastal Eng. Tianjin University Tianjin P. R. China. Engineer rd Survey Design Institute of the Ministry of Railway Tianjin P. R. China. 《中国海洋工程》1998,(4)
The retaining wall made of large successive cylinders is a kind of structure which draws muchattention in coastal engineering of China.The earth pressure on the arched back of large successive cylin-ders is different from that on the plane back of a general wall.On the basis of equilibrium of forces on thestrip element taken from the soil between two cylinders,the differential equation is established and theanalytic solution to the equation is obtained.The formulas of earth pressure on large successive cylindersare given in this paper.The distribution of earth pressure around the circle given by the present formulas isdifferent from that given by the formulas commonly used at present,but it is identical with that measuredin the model test. 相似文献
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Interaction Between Waves and A Comb-Type Breakwater 总被引：2，自引：1，他引：2
The characteristics of wave transmission, reflection and energy dissipation of comb-type caisson breakwaters are studied through laboratory physical model tests. Regular and irregular waves, with a wide range of wave heights and periods and a constant water depth, are considered. Different dimensions of each portion of the comb-type caisson breakwater are tested. Empirical formulae for calculating the reduction coefficient k, which is the ratio of horizontal wave force on unit length of the comb-type breakwater to that on unit length of the vertical wall breakwater, and for calculating the reflection coefficient of waves k, are obtained from the measurements. The comb-type caisson breakwater has been found to be very efficient in dissipating incident wave energy and in reducing wave reflection, and has already been used for the construction of an island breakwater in the Dayao Bay of Dalian Port, Liaoning Province, China. Compared with the cost of a common caisson breakwater, about 24. 5% of the investm 相似文献
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PAN Shaohua XIAQiyi LIN Shiqing XU Lunhuan
Professor Dept. of Coastal Engineering College of Harbour Waterway Coastal Engineering Hohai University Nanjing P. R. China.
Senior Engineer Dept. of Coastal Engineering College of Harbour Waterway Coastal Engineering Hohai University Nanjing P. R. China.
Senior Engineer Fujian Province Ports Shipping Administration Bureau Fuzhou P. R. China. 《中国海洋工程》1999,(2)
Test studies on the wave pressure on a breakwater pier show that the influence of transmissivewave pressure on the outside wall of the breakwater pier is considerable,when the width of the pier is notvery large.The variations of transmissive wave pressure on the breakwater pier with different widths arecompared and the relationship is obtained between relative transmitting distance b/L and wave pressurereduction factor K,which may be used in the design of similar breakwater piers. 相似文献
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