Horizontal cyclic loading system and method for vibration test of offshore fan pile foundation
A technology of cyclic loading and vibration test, which is applied in the test of basic structure, basic structure engineering, construction, etc., can solve the problems of large test error, soil disturbance, complex operation, etc., to improve the accuracy of test data and reduce test error Effect
Active Publication Date: 2018-12-14
HOHAI UNIV
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Problems solved by technology
The method of applying cyclic load by external vibration exciter is complicated to operate and easily disturbs the soil; the cyclic loading device based on the gear structure has been published as an invention patent, such as the invention of Zhejiang University Guozhen et al. "for offshore wind turbines" Multi-directional cyclic loading device and method for vibration test of supporting structure (CN201510624557.7)", but during the vibration process of pile foundation, the amplitude of the horizontal cyclic load provided by the cyclic loading device is constantly changing, and it is impossible to apply a constant amplitude horizontal cycle Load, so for the experiment using the control variable method to study, there will be a large experimental error
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[0037] The present invention is described in further detail now in conjunction with accompanying drawing. These drawings are all simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, so they only show the configurations related to the present invention.
[0038] Such as Figure 1-Figure 8 As shown, it includes the following characteristic components: 1 is the supporting frame, 2 is the horizontal cyclic loading module, 3 is the cyclic load amplitude control module, 4 is the pile angular displacement monitoring module, 5 is the angle conversion and correction module, 6 is the power supply system , 1-1 is the driving shaft, 1-2 is the driven shaft, 1-3 is the multi-diameter pile foundation sleeve, 1-3-1 is the thread structure, 1-3-2 is the outer wall, 1-4 is the bushing , 2-1 is the mass block, 2-2 is the active force application gear, 2-3 is the passive force application gear, 2-4 is the micro motor, 2-5 is th...
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The invention relates to a horizontal cyclic loading system and method for a vibration test of an offshore fan pile foundation. The horizontal cyclic loading system comprises a horizontal cyclic loading module for setting an initial horizontal cyclic load applying value, a pile body angular displacement monitoring module for collecting real-time angular displacement of a pile body, an angle conversion and correction module for angle signal processing and real-time correction, and a cyclic load amplitude control module for real-time correction of the horizontal cyclic load, wherein the horizontal cyclic loading module and the cyclic load amplitude control module are carried and arranged in a supporting frame from bottom to top, and the outer bottom surface, close to the horizontal cyclic loading module, of the supporting frame is in rigid connection with a multi-diameter pile foundation sleeve. The horizontal cyclic loading system is simple in principle and convenient to operate, and meanwhile, the amplitude of the horizontal cyclic load can be kept constant in the test, so that the purposes of decreasing the error of a test device and improving the test accuracy are achieved.
Description
technical field [0001] The invention relates to a horizontal cyclic loading system and method for vibration tests of pile foundations of offshore wind turbines, and belongs to the technical field of indoor model test equipment for dynamic characteristics of pile foundations of offshore wind turbines. Background technique [0002] Wind energy is one of the cleanest, most environmentally friendly and most commercially valuable energy sources developed and utilized by humans so far. Compared with onshore wind energy, offshore wind energy has large resource reserves, high wind speed, low wind shear, low turbulence, It has the advantages of less noise pollution and no occupation of cultivated land; my country's total wind energy reserves are about 3.226 billion kW, and about 1 billion kW of wind energy can be developed, of which offshore wind energy is 750 million kW. The vigorous development of offshore wind power resources has reduced the consumption of fossil energy in my count...
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IPC IPC(8): E02D33/00
CPCE02D33/00
Inventor 赵家林管大为李嘉隆张继生钱方舒
Owner HOHAI UNIV