Multi-wave-condition large-size fixed maritime work platform horizontal force calculation method

A calculation method and large-scale technology, applied in marine engineering, bridge engineering, and coastal fields, can solve problems such as large amount of calculation, unfavorable popularization and application, and heavy computing tasks for computing personnel, achieving good checking effect, simple calculation process, and saving. Effects of time cost and trial cost

Active Publication Date: 2019-12-06
ZHEJIANG INST OF HYDRAULICS & ESTUARY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Many literatures use this wave-flow load model for time-domain simulation of structural dynamic response. The disadvantage of this model is that the amount of calculation is too large, and the calculation tasks of calculation personnel are heavy, which is not conducive to popularization and application in engineering.

Method used

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  • Multi-wave-condition large-size fixed maritime work platform horizontal force calculation method
  • Multi-wave-condition large-size fixed maritime work platform horizontal force calculation method
  • Multi-wave-condition large-size fixed maritime work platform horizontal force calculation method

Examples

Experimental program
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Effect test

Embodiment 1

[0056] Example 1: Regular waves determined by wave height and period

[0057] In this embodiment, a rectangular offshore platform is selected as the implementation object. The top elevation of the offshore platform is +6m, the bottom elevation of the offshore platform is -2m, the seabed elevation is -21.5m, the static water level is +3.5m, and the incident wave height is set to 2m, see Table 1 for specific implementation groups.

[0058] Table 1 Implementation group times

[0059]

[0060] Since this embodiment is a regular wave whose wave height and period are determined, the horizontal force calculation formula of the large-scale offshore platform in step 2 is directly used to calculate the horizontal force of the offshore platform under the condition of regular waves. Since the flow velocity is 0 during the test, and the offshore platform There are no other structures on the top and bottom, so there is no need to go through steps 3 and 4 for correction. image 3 For th...

Embodiment 2

[0061] Example 2: Irregular waves with known combined cycle-wave height distribution

[0062] Figure 4 is the joint distribution map of period and wave height in a sea area, h in the figure is the actual wave height divided by the average wave height, and t is the actual period divided by the average period. In this embodiment, the offshore platform adopts a rectangular offshore platform with a length of 40m (1 / 2 length b of the offshore platform is 20m), a width of 40m, a top elevation of the offshore platform of +6m, and a bottom elevation of -2m. The static water level is +3.5m, and the seabed elevation is set to -21.5m. In this embodiment, the horizontal force of the offshore platform is calculated within the curve range of the equal probability density P=0.01.

[0063] According to the irregular wave calculation steps, set the cycle interval to 0.5s, such as Figure 4 As shown, in the horizontal method, the range of the equal probability density P=0.01 curve is divide...

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Abstract

The invention relates to a multi-wave-condition large-size fixed maritime work platform horizontal force calculation method, and belongs to the technical field of coast, ocean engineering and bridge engineering. The multi-wave-condition large-size fixed maritime work platform horizontal force calculation method comprises the steps: obtaining related data of a large-size maritime work platform; calculating the horizontal force of the large-size maritime work platform; and correcting the horizontal force of the large-size maritime work platform in sequence according to the flow velocity condition of the local sea area and the pier structure to obtain the horizontal force of the large-size maritime work platform under the final wave-current combined action. According to the multi-wave-condition large-size fixed maritime work platform horizontal force calculation method, the wave acting force and the water flow acting force borne by the large-size maritime work platform in the severe sea condition can be well predicted; the calculated horizontal force is close to a physical model test result and a mathematical model calculation result, and compared with a traditional physical model anda mathematical model, the time cost and the test cost are saved, and the economical efficiency is high; and the multi-wave-condition large-size fixed maritime work platform horizontal force calculation method has a relatively high guiding effect on coast and ocean engineering design.

Description

technical field [0001] The invention belongs to the technical field of coast, ocean engineering and bridge engineering, and in particular relates to a horizontal force calculation method of a large-size fixed marine platform under multiple wave conditions. Background technique [0002] The offshore platform plays a connecting role in the offshore structure and is a key link in the design and construction of the offshore structure. Offshore platforms are generally set on the surface of seawater, where the effects of waves and currents are obvious. In recent years, with the continuous development of the ocean and the rapid development of my country's transportation, energy, fishery, national defense and other undertakings, the construction of more and more marine structures has been promoted, and the size of marine structures has also been continuously increased, setting new records repeatedly , and plans to continue to develop in outer sea areas and deep sea areas. As the wa...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 董伟良邵杰胡金春陈刚王永举黄世昌胡子俊陈韬霄梁斌许政
Owner ZHEJIANG INST OF HYDRAULICS & ESTUARY
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