Internal solitary wave acting force characteristic analysis method considering background flow field

Abstract

The invention provides an internal solitary wave acting force characteristic analysis method considering a background flow field, and the method comprises the following steps: step 1, carrying out thenumerical simulation of a South China sea circulation through employing a three-dimensional ocean numerical model; step 2, establishing an internal wave numerical value water tank; and step 3, determining the effect of the internal wave on the ocean structure through the internal wave numerical value water tank and the ocean structure network model which consider the background process. Accordingto the invention, the problem that the background flow field cannot be considered in the internal wave wave-generating method is solved. The internal wave ocean mode, the internal wave computationalfluid mechanics method and the internal wave acting force theory method are combined together for the first time, and a complete calculation system of the internal wave generating method and the forcemeasuring method considering the background flow field is formed. According to the method, the effect research of the internal waves on the structure is closer to the actual situation, and the methodcan play a role in guiding the safety load calculation and the structure design of the offshore structure.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a method for analyzing force characteristics of internal solitary waves in consideration of a background flow field. Background technique [0002] With the continuous development of offshore drilling and the continuous exploitation of offshore oil fields, people have turned their attention to the deep sea. my country's South China Sea has rich oil and gas reserves and has become a strategic resource base for my country's offshore oil and gas production and development. However, complex seawater stratification phenomena also exist in the South China Sea, and internal wave activities are very frequent. [0003] Ocean internal waves have a huge impact and threat on marine transportation and offshore engineering structures (including offshore platforms, marine riser systems, submarine pipeline systems, mooring and cables, oil storage vessels, etc.). On April 10, 1963, the ...

AI Technical Summary

Problems solved by technology

[0010] As mentioned above, among the numerical studies of internal waves, one is large-scale numerical model research, which is mainly used to simulate the generation, propagation and dissipation process of internal waves in the actual ocean environment, and the results are closer to the actual conditions. Internal wave environment (considering factors such as the background flow field), but the grid density is often large, and the effect of internal waves on marine structures cannot be calculated

The other is the computational fluid dynamics internal wave tank at a small scale, which is mainly used to calculate the characteristics of the internal wave and the interaction between the internal wave and the structure under the small-scale condition. Compared with the large-scale numerical model, it is more precise, but small Theoretical methods are often used to produce internal waves in large-scale internal wave tanks. Both the waveform and the velocity field are quite different from the actual situation, and it is impossible to calculate the force of the structure in the real internal wave environment.

Images