Novel model testing platform for interaction of offshore wind turbine upper structure-foundation-soil power

A technology for offshore wind turbines and model testing, which is applied in the testing of basic structures, the use of repetitive force/pulse force to test the strength of materials, and basic structure engineering. It can solve problems such as no longer safe and achieve the effect of filling the gaps in theoretical research

Active Publication Date: 2013-11-20
ZHEJIANG UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

This change may make the originally safe structural design frequency fall within the frequency range of a certain external exciting force and become unsafe

Method used

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  • Novel model testing platform for interaction of offshore wind turbine upper structure-foundation-soil power
  • Novel model testing platform for interaction of offshore wind turbine upper structure-foundation-soil power
  • Novel model testing platform for interaction of offshore wind turbine upper structure-foundation-soil power

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Embodiment Construction

[0024] refer to Figure 1 to Figure 6 , the present invention includes a basic part and three sets of components assembled at different times. The basic part includes a rectangular body test tank 4 for simulating a silt seabed foundation. The foundation 7, the surroundings of the experimental tank 4 are higher than the silt seabed foundation, and a number of microporous permeable sheets 8 are pasted on the inner and outer walls of the suction barrel foundation.

[0025] The silt seabed foundation set in the test tank represents the typical foundation conditions of wind farms under construction or potential within 10km offshore of the southeast coast of my country; the size of the test tank is: 3m×1.2m×1.5m (length×width×height ), made of seamless steel plate with anti-corrosion treatment on the surface. The bottom of the test tank is a 30cm thick drainage system composed of PVC drainage pipes, gravel, steel mesh and non-woven geotextiles, which is used to accelerate the draina...

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Abstract

The invention provides a whole set of a model testing platform for researching the interaction of offshore wind turbine upper structure-foundation-soil power. The model testing platform comprises a foundation part and three sets of constituent parts which are not assembled at the same time, wherein the foundation part comprises a rectangular testing groove and a suction force type barrel-shaped foundation; a plurality of micro-pore water-penetrating thin sheets are stuck on the inner and outer walls of the suction force type barrel-shaped foundation. The model testing platform provided by the invention comprises the foundation part and the three sets of the constituent parts which are not assembled at the same time; after a simulated floury soil seabed foundation is arranged in the testing groove, data obtained by tests of the first set of the constituent part and the second set of the constituent part is used for carrying out a test after the third set of the constituent part is mounted, so that the foundation rigidity of a fan structure under the effect of circulating loads with a certain property, and a power property development and evolution process of the upper structure can be obtained. According to the conclusions obtained by the testing platform provided by the invention, theoretical research blanks in the aspect at home and abroad can be effectively filled to a certain extent, so as to provide certain guide effects on the design of an offshore wind turbine structure in the future.

Description

technical field [0001] The invention relates to an offshore test platform, in particular to a model test platform for the dynamic interaction of the superstructure, foundation and soil of an offshore fan. Background technique [0002] As a safe, clean and stable renewable energy, offshore wind energy has been developed and utilized on a large scale in Western countries such as Europe and the United States. With the increasingly serious problems of energy shortage and environmental pollution, my country also put forward the goal of achieving the total installed capacity of offshore wind power to reach 5000MW in 2015 during the "Twelfth Five-Year Plan" period. [0003] At present, the blade rotation rate of a 3MW offshore wind turbine under normal operating conditions is about 8.6-18.4rpm, and the frequency of the 1P exciting force generated is 0.14-0.31Hz; The frequency of the 3P excitation force generated by the "shielding effect" of the frame is 0.42-0.93Hz. In addition, ...

Claims

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Application Information

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IPC IPC(8): G01N3/32E02D33/00
CPCY02B10/30E02B2017/0078
Inventor 王立忠余璐庆国振李玲玲
Owner ZHEJIANG UNIV
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