KR101446227B1 - Unconfined compression test device for offshore wind power substructure available eccentric load loading - Google Patents

Abstract

The present invention relates to a uniaxial compressive test device for an offshore wind power substructure capable of carrying an eccentric load that can apply a load along an axis and simultaneously move the load in left and right directions when carrying out a test to evaluate the stability of the offshore wind power substructure, so that the offshore wind power substructure is moved to coincide with the reality against confining pressure according to the movement of the ground.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a uniaxial compression test apparatus for an offshore wind force supporting structure capable of eccentrically load-

The present invention relates to a uniaxial compression testing apparatus, and more particularly, to an apparatus and method for testing a uniaxial compression test apparatus capable of applying a load along an axis during a test for confirming the behavior of an offshore wind force supporting structure, And a uniaxial compression test apparatus for an offshore wind power structure capable of eccentric load-carrying to move away from the confining pressure and to exhibit a behavior conforming to reality.

Offshore wind power generation refers to a power generation system in which a wind turbine is installed in a lake, a fjord terrain, or a coastal waterside, and the kinetic energy of the wind blowing there is converted into mechanical energy by rotating wings to obtain electricity.

By the end of 2008, the total cumulative capacity of offshore wind turbines was 1,473 MW, slightly more than 1% of the total cumulative wind capacity, and in 2008, 350 MW, a 30% increase, was added.

As for the advantages of offshore wind power generation, it is not easy to find an area where wind turbines can be installed in a country with a narrow land area. In other words, in the case of onshore wind power generation, there is a limitation of installation site. On the other hand, it is possible to construct a large-scale wind power generation complex with a good land acquisition.

In addition, due to the reduction of obstacles, the sea level can be maintained to be 1.5 ~ 2 times higher than that of land-based wind power generation under similar conditions due to less turbulence of wind and change of wind speed according to its height or direction. In the case of power generation, since it is installed off the coast, problems such as noise caused by the enlargement of the wind turbine and visual over-pressure can be solved.

And the wind turbines installed on the sea make an excellent landscape. For example, in Denver, Denmark, Lunden is known as a successful example of building a global offshore wind farm, becoming a popular sightseeing tour route as well as power production, and the wind turbine support in the seawater serves as a good spawning ground for fish and sea creatures And the wind turbine support on seawater serves as a shelter for migratory birds.

Offshore wind power facilities are largely divided into superstructures such as turbines, blades, towers, and support structures.

First, the superstructure basically applies the same technology as for land-based wind power generation. The life span of marine wind power generation is about 25 years, and the wind turbine of 3 ~ 5 MW or more, which is larger than that on land, is applied. Each element is designed and coated to prevent corrosion damage due to salt.

Substructure can be divided into four types.

The gravity based foundation type was used in the early offshore wind farms as it was easy to build and install and was applied to Vindeby, Middelgrunden offshore wind farms. It can be used at relatively shallow water depths of 6 ~ 10m and maintain its position by its frictional force with its own weight and sea floor. The base diameter is 12 ~ 15m.

The Monopile type is the most widely used offshore wind farm complex, and can be installed at depths of 25 to 30 meters. Horns Rev and North Hoyle offshore wind farms have been applied to large-scale complexes in which the large diameter piles are fixed by driving or drilling on the sea floor. This is good. The base diameter is 3 ~ 3.5m.

The jacket type is a type that is showing much interest in the present state of the offshore wind farm and is being demonstrated, and it can be installed at a depth of 20 ~ 80m. This type, applied in the UK's "The Talisman Beatrice Wind Farm Demonstrator" project, is supported by a jacketed structure and secured to the seafloor by piles or piles. It is a structure of large water depth ocean, has high track record and high reliability, and is economically advantageous when used in large-scale complex construction like monophasic type.

 Floating type is a mandatory task for future deep-sea wind power generation and is being studied in many countries to be installed at a depth of 40 ~ 900m.

In order to evaluate the stability of the support structure, it is necessary to measure the deformation behavior according to the correct compressive force in the marine environment.

In order to measure the deformation behavior according to this compressive force, it is generally tested using a uniaxial compression device.

That is, the uniaxial compression device is constructed by mounting a structure, which is a support structure model, in the trough and compressing the upper end of the structure in the axial direction by using the compressor of the uniaxial compression device.

However, in such a conventional uniaxial compression apparatus, there is a compressor that follows one axis, and the portion to be compressed, that is, the structure is compressed along one axis.

However, in the case where the part to be compressed is buried in the ground having fluidity like the soil, if the compression is performed along the axis, the rotation due to the flow of the earth and sand is restrained. And the like.

Korean Patent Publication No. 10-2010-0000337 Korean Patent Publication No. 10-2011-0033628

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems and it is an object of the present invention to provide a structure for supporting an offshore wind force supporting structure according to the flow of ground, The present invention provides a uniaxial compression test apparatus for an offshore wind force supporting structure capable of eccentrically load-bearing the test piece so as to exhibit a behavior conforming to reality.

According to an aspect of the present invention,

An earth surface having an upper surface and an open space formed therein so that the gravel is piled up inside and the offshore wind force supporting structure as a test model is inserted; A frame coupled to an upper portion of the tundra and having an upper end portion of the offshore wind force supporting structure located at an inner central portion thereof; A first and a second rotary motors installed at positions symmetrical to each other at both ends of the frame; A pulling wire having one end fixed to the first rotating motor and the other end fixed to the second rotating motor; A lower pulley installed at one side of the frame and guiding the tow wire to an upper end of the offshore wind force supporting structure; A lower member coupled to an upper end of the offshore wind power support structure; Wherein the first and second rotary motors are coupled to the lower member and apply pressure to the lower member by a load generated by the pulling wire in accordance with rotation of the first and second rotary motors, An upper member having a variable axial axis; An upper pulley installed at both ends of the upper member to guide the tow wires; A first load cell installed between the upper material and the lower material; And a second load cell which is respectively installed on the pulling wire and installed between the upper pulley and the lower pulley, respectively.

Here, the lower dowel is installed at an end of a pedestal installed on the frame so as to extend toward the offshore wind power supporting structure.

In addition, the bottom material is formed in a cylindrical shape, and an inserting protrusion is protruded on a bottom surface to be coupled to an upper end of the offshore wind power supporting structure, and the cross-sectional shape of the upper material is inserted into a U- Is formed.

Here, the upper member may be formed in the shape of a rectangular plate and may be rotatably coupled to both ends of the upper member; And a coupling protrusion protruded vertically from a lower central portion of the main body, the coupling protrusion being formed in a U-shaped cross-sectional shape and inserted into the coupling groove of the lower component.

Here, a gap (g) is provided between the engaging groove of the lower member and the engaging jaw of the upper member so that a compressive force is applied to the first load cell.

Here, the first load cell is formed in a ring shape, and first and second stages are formed at the upper and lower ends, respectively, to prevent the lower load and the upper load from being separated from each other.

Here, the upper surface of the lower member and the lower surface of the upper member are respectively formed with third and fourth stages coupled with the first and second stages of the first load cell, respectively.

According to the uniaxial compression test apparatus for an offshore wind force supporting structure capable of eccentrically loaded loads of the present invention, which is configured as described above, it is possible to load the load along the axis while moving it to the left and right in the test for evaluating the stability of the off- In this way, it is possible to perform the same simulation as the actual situation by allowing the offshore wind force supporting structure to deviate from the confining pressure according to the ground flow and to exhibit the behavior conforming to reality.

1 is a perspective view showing a configuration of a uniaxial compression testing apparatus for an offshore wind force supporting structure capable of eccentrically loading loads according to the present invention.
2 is a front view of Fig.
3 is a cross-sectional view of a combined state of a lower member and an upper member of a uniaxial compression testing apparatus for an offshore wind force supporting structure capable of eccentrically loaded loads according to the present invention.
4 is an explanatory view for explaining the operation of the uniaxial compression testing apparatus for an offshore wind force supporting structure capable of eccentrically loaded loads according to the present invention.

Hereinafter, the configuration of a uniaxial compression testing apparatus for an offshore wind force supporting structure capable of eccentrically loaded loads according to the present invention will be described in detail with reference to the accompanying drawings.

In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The following terms are defined in consideration of the functions of the present invention, and may be changed according to the intentions or customs of the user, the operator, and the like. Therefore, the definition should be based on the contents throughout this specification.

FIG. 1 is a perspective view showing the construction of a uniaxial compression testing apparatus for an offshore wind force supporting structure capable of eccentrically loaded loads according to the present invention, FIG. 2 is a front view of FIG. 1, Sectional view of a combined state of a lower member and an upper member of a uniaxial compression test apparatus for an offshore wind power support structure.

1 to 3, the uniaxial compression testing apparatus 1 for an offshore wind force supporting structure capable of eccentrically loading loads according to the present invention comprises a toaster 10, a frame 20, The motor M1 and M2, the traction wire W, the lower pulley R1, the lower material 30, the upper material 40, the upper pulley R2 and the first load cell 50 , And a second load cell (60).

First, the soil 10 is formed into a hexahedron with a material such as metal, synthetic resin, or concrete so that the soil 11 is loaded therein and the space portion 11 is formed so that the offshore wind force supporting structure 100, And the upper surface is opened.

The frame 20 is coupled to the upper portion of the tundish 10 and the upper end of the offshore wind force supporting structure 100 is located at the inner center portion. Here, the frame 20 preferably includes a pedestal 21 for fixing the lower dowel R1 so that the lower dowel R1 to be described later extends toward the offshore wind force supporting structure 100 side.

Further, the first and second rotary motors M1 and M2 are provided at positions symmetrical to each other so as to have the same height at both ends of the frame 20. [ At this time, the first and second rotary motors M1 and M2 are rotated in different directions to pull the traction wire W to be described later.

One end of the traction wire W is fixed to the first rotation motor M1 and the other end is fixed to the second rotation motor M2. At this time, a plurality of traction wires W may be provided.

The lower pulley R1 is rotatably installed at the end of the pedestal 21 of the frame 20 to guide the traction wire W to the upper end of the offshore wind force supporting structure 100. At this time, the lower pulley R1 is provided in a number corresponding to the number of the pulling wires W.

The bottom material 30 is formed in a cylindrical shape so as to be coupled to the upper end of the offshore wind power supporting structure 100 and has an insertion step 31 protruding from the bottom surface to be coupled to the upper end of the offshore wind power supporting structure 100 And a coupling groove 33 having a U-shaped cross-sectional shape is formed so that the upper member 40 to be described later is inserted in the upper center portion. Here, a third step 35 is formed on the upper surface of the lower material 30 to be coupled with the first step 51 of the first load cell 50, which will be described later.

The upper member 40 is formed in a rectangular plate shape and includes a main body 41 which is rotatably coupled to both ends of the upper pulley R2, a main body 41 vertically protruding from a lower central portion of the main body 41, And a coupling step 43 which is formed in a U shape and inserted into the coupling groove 33 of the lower member 30 so that the traction wire W is rotated in accordance with the rotation of the first and second rotary motors M1 and M2. The pressure applied to the bottom material 30 by the load generated by the wind power supporting structure 100 is varied and the axis moved to the left and right according to the rotation of the offshore wind power supporting structure 100 is varied. Here, the joining jaw 43 of the upper joist 40 is formed to have the gap g with the joining groove 33 of the lower joist 30, So that a compressive force is applied to the load cell 50. Here, a fourth step 45 is formed on the bottom surface of the upper member so as to be coupled with the second step 53 of the first load cell 50, which will be described later.

Further, the upper pulley R2 is rotatably installed at both ends of the upper material 40 to guide the traction wire W. At this time, the upper pulley R2 is provided in a number corresponding to the number of the traction wires W.

The first load cell 50 is formed in a ring shape so as to be installed between the upper material 40 and the lower material 30 so as to prevent the lower material 30 and the upper material 40 from being separated from each other. First and second stepped portions 51 and 53 are formed at the upper and lower ends, respectively.

The second load cell 60 is formed in a cylindrical shape and is installed on the traction wire W so as to be positioned between the upper pulley R2 and the lower pulley R1.

Hereinafter, the operation of the uniaxial compression testing apparatus for an offshore wind force supporting structure capable of eccentrically loaded loads according to the present invention will be described in detail with reference to the accompanying drawings.

4 is an explanatory view for explaining the operation of the uniaxial compression testing apparatus for an offshore wind force supporting structure capable of eccentrically loaded loads according to the present invention.

First, the soil is filled in the tundish 10, and the offshore wind force supporting structure 100 to be applied to the experiment is inserted.

Then, the inside of the offshore wind force supporting structure 100 is filled with gravel and then the bottom joining member 30 is joined to the upper end of the offshore wind force supporting structure 100.

Subsequently, the first load cell 50 is coupled to the lower jig 30, and the joining jaw 43 of the upper jig 40 is inserted into the joining groove 33 of the lower jig 30.

Subsequently, the traction wire W is mounted on the upper surface of the main body 41 of the upper material 40, and both ends of the traction wire W are mounted on the upper pulley R2.

Then the upper end of the second load cell 60 is coupled to the same position of both ends of the traction wire W and the traction wire W drawn out from the first and second rotary motors M1 and M2 is coupled to the second load cell 60, Respectively, to complete the installation. Meanwhile, the first load cell 50, the second load cell 60, and the first and second rotary motors M1 and M2 are connected to the control unit (not shown).

In this state, when the first and second rotary motors M1 and M2 are rotated, the pulling wire W is pulled and a vertical load is generated in the upper material 40. [

Then, the pressure of the upper material 40 is applied to the offshore wind force supporting structure 100 through the first load cell 50 and the lower material 30 so as to be introduced into the soil material of the soil 10.

On the other hand, when the compressive force is applied to the offshore wind force supporting structure 100, as shown in FIG. 4, the offshore wind force supporting structure 100 rotates due to the flow of the earth surface when the soil has fluidity.

When the offshore wind force supporting structure 100 is rotated, the upper member 40 rotates together at the same angle. At this time, the angle of the traction wire W also varies, and the difference in length of the traction wire W is transmitted to the first and second rotary motors M1 and M2 via the pressure difference applied to each second load cell 60 on the control unit side, M2 is controlled to correct.

Accordingly, even when the offshore wind power supporting structure 100 rotates, the upper wind turbine 40 can rotate and move on the same axis to apply pressure.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It is to be understood, however, that the invention is not to be limited to the specific forms thereof, which are to be considered as being limited to the specific embodiments, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims. .

10: frame 20: frame
30: Substrate 40: Substrate
50, 60: first and second load cells M1, M2: first and second rotary motors
R1, R2: Lower and upper pulley W: Traction wire

Claims (7)

An earth surface having an upper surface and an open space formed therein so that the gravel is piled up inside and the offshore wind force supporting structure as a test model is inserted;
A frame coupled to an upper portion of the tundra and having an upper end portion of the offshore wind force supporting structure located at an inner central portion thereof;
A first and a second rotary motors installed at positions symmetrical to each other at both ends of the frame;
A pulling wire having one end fixed to the first rotating motor and the other end fixed to the second rotating motor;
A lower pulley installed at one side of the frame and guiding the tow wire to an upper end of the offshore wind force supporting structure;
A lower member coupled to an upper end of the offshore wind power support structure;
Wherein the first and second rotary motors are coupled to the lower member and apply pressure to the lower member by a load generated by the pulling wire in accordance with rotation of the first and second rotary motors, An upper member having a variable axial axis;
An upper pulley installed at both ends of the upper member to guide the tow wires;
A first load cell installed between the upper member and the lower member and formed in a ring shape and having first and second stages formed at the upper and lower ends respectively to prevent the lower member and the upper member from being separated from each other; And
And a second load cell installed on the pulling wire, the second load cell being installed between the upper pulley and the lower pulley, respectively, and the uniaxial compression testing device for an offshore wind force supporting structure capable of loading an eccentric load. The method according to claim 1,
Wherein the lower downdraft comprises:
Wherein the windscreen is installed at an end of a pedestal installed on the frame so as to extend toward the offshore wind force supporting structure. The method according to claim 1,
The undergarment comprises:
A coupling groove having a U-shaped cross-sectional shape is formed so as to be inserted into the upper end of the upper end center portion, Uniaxial compression test equipment for offshore wind support structures capable of eccentric load. The method of claim 3,
Wherein the upper material comprises:
A body formed in a rectangular plate shape and rotatably coupled to both ends of the upper pulley;
And a coupling protrusion protruded vertically from a lower central portion of the main body and having a U-shaped cross-sectional shape and inserted into the coupling groove of the lower component. Single Axis Compression Test System. 5. The method of claim 4,
Between the joining groove of the lower member and the joining jaw of the upper member,
And a gap (g) is provided to apply a compressive force to the first load cell. The uniaxial compression testing apparatus for an offshore wind force supporting structure capable of eccentric load loading. delete The method according to claim 1,
And the upper surface of the lower material and the lower surface of the upper material.
And the third and fourth stages coupled with the first and second stages of the first load cell are respectively formed on the first and second load cells.

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