Study on nonlinear waves in this region
In the study of regional nonlinear waves, it is proved that most of the design wave standards adopted in coastal engineering design practice in China are within the applicable scope of shallow water elliptic cosine waves. To this end, he presided over the development of wave-making software for generating elliptic cosine waves and solitary waves in the laboratory flume, and systematically studied the waveform, velocity and acceleration of its water quality points. It is proved theoretically that the nonlinear wave in shallow water described by elliptic function can be approximated by the combination of linear waves. He used this method to study the common coastal engineering theories such as waves and piers, piers and straight walls, and carried out experimental verification in the flume. On this basis, he compiled the calculation table of calculation software and engineering application. These achievements have important academic and engineering application values and have been included in the revised design code of the Ministry of Communications.
Elliptic cosine wave
The statistical analysis theory of wave surface extreme value is applied to the statistical analysis of the maximum wave force hydrograph of buildings, and the wave force of offshore buildings such as columns, piers and piers is studied theoretically, and a simple and feasible calculation method of the maximum wave force in engineering is obtained, which is of great value to the revision of design specifications. In the study of irregular waves in shallow water, he proposed a series of random elliptic cosine waves to describe the model of nonlinear irregular waves in order to improve the linear wave model described by a series of random cosine waves, and developed wave-making software to generate such irregular waves in the laboratory sink.
Leading to the interaction between leakage in the seabed and marine structures.
Qiu Dahong systematically studied the wave seepage force and wave seepage field around a series of marine structures such as docks, platforms, vertical walls and buried pipelines, and obtained analytical and numerical solutions. The research work is characterized by considering the compressibility of pore water and soil skeleton, the action of elliptic cosine wave in shallow water and nonlinear seepage in coarse-grained soil medium, which has been highly praised by academic circles at home and abroad.
Professor Qiu Dahong takes teaching and educating people as his bounden duty. For more than 50 years, he has been working hard in the front line of teaching. He set an example and educated students to serve the socialist modernization and the people. He led students to the coastal engineering site many times, learned from engineering practice, learned from front-line engineers and workers' masters, and guided them to take the road of healthy growth of young intellectuals. Among the more than 30 graduates he trained, many have become leading forces and business backbones in socialist construction posts.
Qiu Dahong has published more than 50 academic papers since 1979, including 23 Chinese papers from domestic first-class journals, 9 English papers, and 2 papers from international academic conferences1,and compiled the monograph Wave Theory and Its Application in Engineering. Together with Hou, he edited and published Hong Kong and Hong Kong Industrial Architecture, the general textbook of the first local engineering college in China. This book has aroused a good response in higher education and is regarded as the main reference book by engineering design circles. Qiu Dahong has published nearly 130 academic papers since 198 1, including 30 foreign academic conferences and 9 domestic academic journals. He has published many books, edited and published the first general textbook of Port Engineering University in China, Port and Port Engineering Architecture, which has aroused good response in the higher education sector. The engineering design community also took it as the main reference book, and compiled the general textbook Engineering Hydrology, the postgraduate textbook Wave Theory and its Application in Engineering, and the wave seepage mechanics with others.
1? Maximum total wave force on piles, Proc? Coastal structure,1983,83.
2? Qiu Dahong, Wave Theory and Its Application in Engineering, Higher Education Press, 1985.
3? d？ h？ Qiu, y? x？ Wang, nonlinear wave forces on large cylinders, proceedings of the fifth international academic conference. Seminar on Ocean Mechanics and Arctic Engineering, Tokyo, Japan, 1986 (O? MAE): Journal of Oceanography (Chinese Version),1986,8 (4).
4? Qiu Dahong, Wang, Wave forces on cylindrical piers under irregular waves, Journal of Oceanography (Chinese version), 1988,10 (6); (English version)1989,8 (3).
5? Qiu Dahong, Nonlinear Wave Force on Shallow Water Isolated Pier, Journal of Hydraulic Engineering,1989,4.
6? d？ h？ Qiu, me? Li, the floating force acting on the breakwater? A mound embedded in the seabed, Proc? The eighth intern. Conf？ Omar Street, The Hague, Netherlands, 1989.
7? Qiu Dahong, Sun, Effect of nonlinear waves on buried pipelines in shallow water, China Geology, 2002? Eighth intern, Conf? On Omar? The Hague, Netherlands, 1989.
8? d？ h？ Qiu, y? x？ Yu, Xiao, Generation of Nonlinear Shallow Water Waves and Horizontal Particle Velocity, 1st? Pacific/Asia Symposium on Marine Mechanics, Seoul, Korea, 1990.
9? Qiu dahong, sun, the effect of waves on the bottom of multi-pier, proceedings of the ninth international conference. Conf？ In Omahaston, v? SA， 1990。
10? d？ h？ Qiu, h? y？ Pan, wave-induced pressure and process under two-dimensional gravity structure? The ninth intern. Conf？ On Omar? Jpistpm？ u？ s？ Answer? , 1990.
1 1? Qiu Dahong, Nonlinear Wave Forces on Cylindrical Piers in Shallow Water, Ocean Engineering,1991(1); English manuscript published in Proc? Ninth intern? Conf？ Omar Street, Stavanger, Norway.
12? Qiu dahong, zang jun, numerical analysis of porous fluid pressure on three-dimensional structures with arbitrary shape on the seabed under wave action, journal of China engineering? 10 intern. Comnf？ Omar Street, Stavanger, Norway, 199 1.
13? Qiu Dahong, Zhou,,, Nonlinear Wave Force of Piles in Shallow Water, China Ocean Engineering,1992,6 (1)?
14? Qiu Dahong, Zou Zhili, Analytical solution of wave seepage pressure on vertical dike foundation, hydrodynamic research and progress,1992,3.
15? Qiu Dahong, Wang Hong, Zang Jun, Permeability of Nonlinear Waves to Cylinders in Shallow Water, China Marine Science, 2003? Isope'93， 1993。
16? Qiu dahong, zang jun, wave force on pier on deformable seabed, j? Fluid mechanics, sir? b， 1993，5( 1)。
17? Qiu dahong, sun, study on the influence of fluctuating seepage in porous media on structures, hydrodynamic research and progress, Ser? b， 1993，5( 1).
18? Qiu Dahong, Wang,, Numerical simulation of wave motion and seepage coupling in submerged breakwater, Geology of the Republic of China? Asian symposium on computational fluid dynamics, 1994?
19? Qiu Dahong, Chen Jian, Wave buoyancy at the bottom of cylindrical pier on riprap foundation, Journal of Oceanography, 1994, 16( 1).
20? Qiu Dahong, Zang Jun, Jia Ying, Effect of Elliptic Cosine Wave on Vertical Wall, China Ocean Engineering, 1996, 10(2).
2 1? Qiu dahong, Wang qilong, permeability of irregular waves to the bottom of a cylinder, J. Ocean and Polar Engineering,1997,7 (1).
22? Qiu Dahong, Freeman Yang, Influence of irregular wave seepage on piers, Journal of Oceanography, 1997, 19(3).
23? Lin Jianguo, Qiu Dahong, Boussinesq equation with first-order nonlinear term and fourth-order dispersion term, Journal of Mechanics,1998,30 (5): 9.
24? Lin Jianguo, Qiu Dahong, Boussinesq equation with second-order nonlinearity and dispersion, China Science,1998,28 (6):12.
25? Qiu Dahong, Wang, 2 1 development trend of coastal and marine engineering in the century, progress of natural science (English version), (Chinese version) 2000, 10 (10).
26? Xun, Qiu Dahong, Shen Yongming, Wang, Wave Measurement Based on Light Refraction, Journal of Oceanography, 2004,23 (2). Wave and its interaction with offshore buildings.
Mainly guide the research direction of master students and doctoral students:
Wave and its interaction with marine structures.
Main published books and papers:
Wave theory and its application in engineering. Higher education press.
More than 50 papers on waves and their interaction with ocean structures have been published.