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Seabed foundation local scouring depth determination method and system based on ocean current design flow velocity

A scour depth and determination method technology, applied in the field of marine engineering survey, can solve problems such as unfavorable design of seabed foundation engineering, inconsistent value standards for dynamic conditions, and lack of clear regulations on technical standards

Active Publication Date: 2020-11-17
CEEC JIANGSU ELECTRIC POWER DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (2) Due to the lack of clear regulations in technical standards, the value standards for dynamic conditions in scour calculations in actual offshore wind farm projects are not uniform
[0005] (3) In some existing offshore wind power project documents, all kinds of ocean currents are simply summed according to scalar (velocity), and the vector summation method is not used for velocity vector superposition
[0006] It can be seen that the current value standards for the dynamic conditions of the calculation of the local scour of the seabed foundation in offshore wind farm projects are not uniform, and even slightly confusing, which is not conducive to obtaining a reasonable and reliable conclusion on the comparison of the advantages and disadvantages of the calculation methods for the local scour of the seabed foundation. The conclusion, of course, is not conducive to the economical and rational design of seabed foundation engineering

Method used

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  • Seabed foundation local scouring depth determination method and system based on ocean current design flow velocity
  • Seabed foundation local scouring depth determination method and system based on ocean current design flow velocity
  • Seabed foundation local scouring depth determination method and system based on ocean current design flow velocity

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Embodiment 1

[0054] Embodiment 1. A method for determining the local scour depth of a seabed foundation based on the design velocity of the ocean current. In this embodiment, the local scour calculation of a pile foundation in an offshore wind farm is taken as an example. The calculation process is as follows figure 1 As shown, it includes the following steps: according to the layered method of the water depth of the engineering sea area under the pre-determined design tide level condition, layered collection of ocean current observation data; collection of on-site wind measurement data of the engineering sea area, seabed topographic information and determination of design wave elements;

[0055] According to the collected ocean current observation data, the tidal current ellipse parameters are obtained through harmonic analysis; according to the obtained tidal current ellipse parameters, the tidal current types of each stratum are discriminated, and the possible maximum flow velocity vector...

Embodiment 2

[0135] Embodiment 2. Corresponding to Embodiment 1, this embodiment provides a system for determining the local scour depth of the seabed foundation based on the design velocity of the ocean current, such as figure 2 As shown, it includes: marine hydrometeorological condition acquisition device, tidal current type analysis module, ocean current design velocity determination module and foundation local scour depth determination module;

[0136] The marine hydrometeorological condition acquisition device is used to collect ocean current observation data in layers according to the layered method of engineering sea area water depth under predetermined design tide level conditions; collect on-site wind measurement data in engineering sea areas, seabed topographic information and determine design wave elements;

[0137] The tidal current type analysis module is used to obtain tidal current ellipse parameters through harmonic analysis according to the collected ocean current observa...

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Abstract

The invention discloses a seabed foundation local scouring depth determination method and system based on ocean current design flow velocity, and the method comprises the steps: collecting ocean current observation data in a layered manner, discriminating the tide type of each layer through harmonic analysis, and calculating the possible maximum flow velocity vector and vertical line average flowvelocity vector of each layer tide; determining a wind and ocean current flow velocity vector according to the measured wind speed data and the seabed terrain; calculating a wave-induced flow design flow velocity vector according to the determined design wave element; synthesizing a vertical line average flow velocity vector, a wind ocean current flow velocity vector and a wave current design flowvelocity vector of the possible maximum flow velocity vector of each layered tide obtained by calculation to obtain an ocean current design flow velocity; and finally determining the local scouring depth of the seabed foundation. The hydrodynamic condition value standard of seabed foundation local scouring calculation is determined through the wave element design recurrence period, the calculation principle and process better accord with the practical situation, and the calculation result is more reliable.

Description

technical field [0001] The invention relates to the technical field of marine engineering survey, in particular to a method for calculating local scouring of seabed foundations, in particular to a method and system for determining local scouring depths of seabed foundations based on design flow velocity of sea currents. Background technique [0002] There are few studies and clear regulations on the standards of marine environmental dynamic conditions selected for scour calculations. At present, the design standards and determination methods for the environmental dynamic conditions of seabed foundation local scour calculations in actual offshore wind farm projects have the following main problems: [0003] (1) The current survey and design standards for offshore wind power projects "Wind Farm Engineering Classification and Design Safety Standards" and the design technical standards of the CNOOC industry, etc., do not have marine dynamic conditions for the local scour calculat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/28G06F113/08G06F119/14
CPCG06F30/28G06F2113/08G06F2119/14
Inventor 潘晓春王晓惠沈旭伟任亚群徐君民葛海明
Owner CEEC JIANGSU ELECTRIC POWER DESIGN INST