Radial sand ridge group typhoon-generated wave numerical simulation method
A numerical simulation, wind and wave technology, applied in the fields of electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of not comprehensively considering the interaction of typhoon waves and seldom successful practice.
Inactive Publication Date: 2015-02-18
HOHAI UNIV
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Problems solved by technology
Although this method can predict the extreme unfavorable wave height more accurately, it does not fully consider the interaction of waves, currents, topography, and substrate during typhoon waves, and cannot provide technical support for in-depth research on the wave, flow and sediment environment during typhoon waves.
[0004] Although there are successful cases in the world that use the wind field and pressure field to estimate the nearshore wave field, in the sea area of the radiation sand ridge group, due to the lack of a deep understanding of the impact of the damping loss on the wave propagation caused by the silt and silt substrate, there are few. successful practice
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[0035] (1) Establish a mathematical model.
[0036] The Lanshayang Channel is located in the south-central part of the radiating sand ridge group in Jiangsu, with wide beaches and deep troughs, such as figure 1 and figure 2 shown. According to the wind field and pressure field data of the "9711" typhoon, a two-dimensional storm surge model is first established to provide the tide level and tidal current process, and on this basis, a typhoon wave nested model is established, such as image 3 and Figure 4 shown. Among them, the typhoon wave field in the entire South Yellow Sea is calculated by the large-scale wind wave field model, which provides the wave boundary for the nested model. The small-scale nested model further considers the refraction and diffraction of waves to calculate the typhoon waves in the Lanshayang channel.
[0037] (2) Select the appropriate friction calculation mode.
[0038] The commonly used bottom friction calculation model does not consider the...
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The invention discloses a radial sand ridge group typhoon-generated wave numerical simulation method which includes steps of building a mathematical model; expanding a friction calculation mode for rigid seabed to soft seabed; simulating according to a variable-friction coefficient varying along with sea level; and rating the proper friction coefficient according to the typhoon-generated wave tested on site. By the method, a radial sand ridge group typhoon-generated wave numerical model is established according to consideration to frictions of bottoms at different sea levels and damping loss difference, so that typhoon-generated wave of a radial sand ridge group can be forecasted accurately.
Description
technical field [0001] The invention belongs to the technical field of numerical simulation and prediction of offshore wave fields, and in particular relates to a numerical simulation method for typhoons and waves of radiation sand ridge groups. Background technique [0002] The typhoon waves of the radiating sand ridge group are affected by the complex terrain, substrate distribution, typhoons, and currents, and are characterized by low wave heights at middle and low tide levels and relatively high wave heights at high tide levels. It is of great theoretical and practical significance to establish a mathematical model of typhoon waves in the radiating sand ridges and accurately forecast typhoons and large waves for the reclamation of tidal flats and the opening of new harbor sites in the radiating sand ridges. [0003] To simulate the wave propagation of radiating sand ridges, the domestic traditional method is to use the wave refraction-diffraction joint equation to predic...
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IPC IPC(8): G06F19/00
Inventor 张玮徐卓王启明陆培东储明生
Owner HOHAI UNIV