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A method for simulating stiffness weakening of jack-up platform pile foundations and pile legs

A self-elevating platform, pile leg technology, applied in the test of the foundation structure, foundation structure engineering, construction and other directions

Active Publication Date: 2021-02-05
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

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  • A method for simulating stiffness weakening of jack-up platform pile foundations and pile legs
  • A method for simulating stiffness weakening of jack-up platform pile foundations and pile legs
  • A method for simulating stiffness weakening of jack-up platform pile foundations and pile legs

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Embodiment Construction

[0117] The present invention will be further described below in conjunction with accompanying drawing:

[0118] 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.

[0119] 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.

[0120] 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

A method for simulating stiffness weakening of jack-up platform pile foundations and legs. The main purpose is to provide a method that can simulate the stiffness weakening of jack-up platform pile foundations and pile legs, and provide experimental basis and technical support for damage identification of platform structure health monitoring. It is characterized in that: the method includes: according to the ratio of the jack-up ocean platform model, the parameters of the actual marine environment load in a specific sea area are converted into experimental environmental data parameters according to the similarity ratio criterion; The maximum environmental load; according to the proportion of the jack-up offshore platform model, the calculated spring stiffness of the pile foundation is converted into the equivalent model spring stiffness; 4 sets of pile legs with different spring stiffness and 4 sets of different wall thickness are prepared through different combinations To simulate the stiffness weakening of jack-up platform pile foundation and pile legs; input the obtained experimental environment data parameters into the computer system, and obtain the modal parameters of the overall platform under different combinations after vibration and percussion tests, and compare them to get The effect of structural weakening on the modal parameters of the platform.

Description

Technical field: [0001] The invention relates to a method applied in the technical field of marine engineering structure monitoring. Background technique: [0002] 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, ensure the safety o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/00G06F17/10E02D33/00E02D27/52E02D27/12E02B17/00
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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