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Method capable of simulating rigidity weakening of pile foundation and pile leg of self-elevating platform

A technology of self-elevating platform and pile legs, which is applied in the test of foundation structure, foundation structure engineering, water conservancy engineering, etc.

Active Publication Date: 2019-06-21
NORTHEAST GASOLINEEUM UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But there is no such simulation and testing device and simulation method in the prior art

Method used

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  • Method capable of simulating rigidity weakening of pile foundation and pile leg of self-elevating platform
  • Method capable of simulating rigidity weakening of pile foundation and pile leg of self-elevating platform
  • Method capable of simulating rigidity weakening of pile foundation and pile leg of self-elevating platform

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Embodiment Construction

[0122] The present invention will be further described below in conjunction with accompanying drawing:

[0123] At first introduce the simulating self-elevating platform pile foundation and pile leg stiffness weakening device that needs to be used when the present invention is implemented, by Figure 1 to Figure 5 As shown, the device includes a self-elevating ocean platform model, a load loading unit, a computer system, a servo drive controller and a signal receiving unit.

[0124] The self-elevating offshore platform model includes a hull 12, a pile foundation 3, a base 4, a No. 1 leg 5, a No. 2 leg 6, and a No. 3 leg 7.

[0125] Hull 12 is a simplified platform model compared with the actual platform. The material of the hull is aluminum. The entire model is a hull with a length of 70.36m, a width of 76.0m, and a depth of 9.45m. The design is based on a geometric similarity ratio of 1:80. It is a simplified platform model with a length of 880mm, a width of 950mm, and a dep...

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Abstract

The invention discloses a method capable of simulating rigidity weakening of a pile foundation and a pile leg of a self-elevating platform. The invention mainly aims to provide a method capable of simulating rigidity weakening of a pile foundation and a pile leg of a self-elevating platform, and provides an experimental basis and technical support for platform structure health monitoring and damage identification. The method is characterized by comprising the following steps: converting parameters of an actual ocean environment load of a specific sea area into experiment environment data parameters according to a similarity ratio criterion based on the proportion of a self-elevating ocean platform model; calculating a maximum environmental load acting on the self-elevating ocean platform;converting the calculated spring stiffness of the pile foundation into equivalent model spring stiffness according to the proportion of the self-elevating ocean platform model; preparing four groups of pile legs with different spring stiffness and four groups of pile legs with different wall thicknesses to simulate weakening of stiffness of the pile foundations and the pile legs of the self-elevating platform in different combination modes; and inputting obtained experimental environment data parameters into a computer system, so as to obtain modal parameters of the whole platform under different combination modes after a vibration knocking test, and conducting comparing to obtain the influence of structural weakening on the modal parameters of the platform.

Description

[0001] Technical field: [0002] The invention relates to a method applied in the technical field of marine engineering structure monitoring. [0003] Background technique: [0004] Ocean engineering structures have served in harsh marine environments for a long time, and are subject to the interaction of various loads, such as wind loads, ocean currents, waves, etc., and sometimes are also subject to unexpected disasters such as earthquakes, typhoons, tsunamis, and ship collisions. Effects of environmental corrosion, marine biofouling, seabed scour, etc. Under the long-term action of these harsh load environments, it is easy to produce various damages and reduce the bearing capacity of the structure. In addition, with the rapid development of the offshore oil industry, more and more offshore platforms are put into use, and there are also many active platforms It has approached or even exceeded the design life. In order to ensure the integrity and safety of the structure, ensu...

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Application Information

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IPC IPC(8): E02D33/00E02D27/52E02D27/12E02B17/00
Inventor 王维刚陶京闫天红赵海峰吴泽民刘金梅徐爽
Owner NORTHEAST GASOLINEEUM UNIV
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