CN114908819B - Supergravity simulation device for offshore wind turbine foundation under wind load effect - Google Patents
Supergravity simulation device for offshore wind turbine foundation under wind load effect Download PDFInfo
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- CN114908819B CN114908819B CN202210838902.7A CN202210838902A CN114908819B CN 114908819 B CN114908819 B CN 114908819B CN 202210838902 A CN202210838902 A CN 202210838902A CN 114908819 B CN114908819 B CN 114908819B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/44—Foundations for machines, engines or ordnance
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/52—Submerged foundations, i.e. submerged in open water
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/727—Offshore wind turbines
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Abstract
The invention relates to the field of test equipment, in particular to a supergravity simulation device for an offshore wind turbine foundation under the action of wind load. Marine fan basis hypergravity analogue means under wind load effect includes: the reaction frame is provided with a bottom plate, a first upright post, a second upright post and a barrel body are fixed on the bottom plate, and the barrel body is used for accommodating a saturated soil layer; the single pile is partially inserted into the saturated soil layer; the force application structure is arranged opposite to the barrel body and comprises at least two crossed first force application parts and second force application parts, the first force application parts and the second force application parts are arranged in parallel with the bottom plate, the fixed end of the first force application part is fixedly connected with the first upright post, the fixed end of the second force application part is fixedly connected with the second upright post, and the telescopic ends of the first force application part and the second force application part are crossed; one end of the force transmission structure is rotatably connected with the single pile, and the other end of the force transmission structure is connected with the intersection of the first force application part and the second force application part. The invention solves the problem that the simulation device cannot simulate the change of the wind load direction along with seasons and days, so that the simulation result is not accurate.
Description
Technical Field
The invention relates to the technical field of test equipment, in particular to a supergravity simulation device for an offshore wind turbine foundation under the action of wind load.
Background
In an offshore wind power development project, a wind turbine foundation is a supporting structure of a wind turbine unit, the position of the wind turbine foundation in the construction of an offshore wind power plant is very important, and a large-diameter single-pile foundation is one of main wind turbine foundation forms. In recent years, a large-diameter single-pile foundation is favored by users due to the advantages of simple processing and manufacturing, convenient installation, simple structure and definite stress. After the offshore wind power project is built, an offshore wind turbine and a single-pile foundation bear a complex marine environment, and particularly, a certain operation rule exists under the combined action of wind, wave, flow load and the like, namely, the characteristics of the reciprocating circulating wind load, such as strength, direction, frequency and the like, change along with seasons and days.
Researches find that with the increase of the times of reciprocating cyclic load, soil around the pile can generate permanent deformation, so that the large-diameter single-pile foundation inclines towards one side, and the safe operation of the wind turbine generator is influenced. At present, a wind load simulation loading device cannot simulate the change characteristics of the wind load direction along with seasons and days, the difference between the obtained simulation result and the real deformation characteristics of a single-pile foundation under the long-term wind load effect is large, and the simulation result is not accurate enough.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the defects that the simulation loading device in the prior art cannot simulate the change characteristics of the wind load direction along with seasons and days, the difference between the obtained simulation result and the real deformation characteristics of a single-pile foundation under the long-term action of the wind load is large, and the simulation result is not accurate enough, so that the supergravity simulation device for the offshore wind turbine foundation under the action of the wind load is provided.
In order to solve the above problems, the present invention provides a supergravity simulation apparatus for an offshore wind turbine foundation under the action of wind load, comprising:
the reaction frame is provided with a bottom plate, a first upright post, a second upright post and a barrel body are fixedly arranged on the bottom plate, and the barrel body is used for accommodating a saturated soil layer;
a mono-pile partially inserted into the saturated soil layer;
the force application structure is opposite to the barrel body and comprises at least two first force application parts and at least two second force application parts which are arranged in an intersecting manner, the first force application parts and the second force application parts are respectively arranged in parallel with the bottom plate, the fixed end of the first force application part is fixedly connected with the first upright post, the fixed end of the second force application part is fixedly connected with the second upright post, and the telescopic ends of the first force application part and the second force application part are intersected;
and one end of the force transmission structure is rotationally connected with the single pile, and the other end of the force transmission structure is connected with the intersection of the first force application part and the second force application part.
Optionally, the force transmission structure includes a force transmission rod and a force application rod, one end of the force application rod, which faces the mono-pile, is a spherical end, the other end of the force application rod is connected with an intersection of the first force application member and the second force application member, one end of the force transmission rod is provided with a flange, the other end of the force transmission rod is provided with an open spherical accommodation space, the spherical accommodation space is in coordinated contact with the spherical end, and the telescopic end of the first force application member and the telescopic end of the second force application member extend or retract respectively to form a periodic force acting on the mono-pile.
Optionally, a gap is formed between the flange of the dowel bar and the upper surface of the single pile.
Optionally, the force transmission structure further comprises a connecting rod, the connecting rod is fixedly connected with the flange plate, and a linear bearing is arranged between the connecting rod and the single pile.
Optionally, the first column and the second column are respectively provided with a mounting hole, and the mounting end of the first force application member and the mounting end of the second force application member are respectively arranged in the mounting holes.
Optionally, the device further comprises a fixing structure sleeved on the periphery of the force application rod, the fixing structure comprises a supporting plate and a movable plate, the supporting plate is detachably connected with a fixing plate on the top of the reaction frame, the movable plate is arranged between the fixing plate and the supporting plate, and the supporting plate is connected with the movable plate in a sliding mode.
Optionally, the movable plate is provided with at least one ball in rotation towards the surface of the support plate, and the ball is in point contact with the support plate.
Optionally, the device further comprises an induction structure, wherein the induction structure comprises a displacement sensor and a force sensor, and the first force application member and the second force application member are both provided with the displacement sensor and the force sensor.
Optionally, the sensing structure further includes at least one strain sensor and at least one soil pressure sensor, the strain sensor is disposed on the mono-pile, and the soil pressure sensor is disposed in a saturated soil layer around the mono-pile foundation.
Optionally, still include centrifuge, be equipped with the hanging flower basket in the centrifuge, reaction frame fixed mounting in the hanging flower basket.
The technical scheme of the invention has the following advantages:
1. the invention provides a supergravity simulation device of an offshore wind turbine foundation under the action of wind load, which comprises: the reaction frame is provided with a bottom plate, a first upright post, a second upright post and a barrel body are fixedly arranged on the bottom plate, and the barrel body is used for accommodating a saturated soil layer; the single pile is partially inserted into the saturated soil layer; the force application structure is arranged opposite to the barrel body and comprises at least two first force application parts and at least two second force application parts which are arranged in an intersecting manner, the first force application parts and the second force application parts are respectively arranged in parallel with the bottom plate, the fixed end of the first force application part is fixedly connected with the first upright post, the fixed end of the second force application part is fixedly connected with the second upright post, and the telescopic ends of the first force application part and the second force application part are intersected; and one end of the force transmission structure is rotationally connected with the single pile, and the other end of the force transmission structure is connected with the intersection of the first force application part and the second force application part. The fixed end of the first force application part is fixedly connected with the first stand column, the fixed end of the second force application part is fixedly connected with the second stand column, the first stand column plays a role in fixing the first force application part, and the second stand column plays a role in fixing the second force application part. The first force application part and the second force application part are arranged in an intersecting mode, the first force application part and the second force application part are arranged in parallel with the bottom plate respectively to enable the force applied by the first force application part and the force applied by the second force application part to be in the same plane, so that the effects of simulating the forces in different directions in the same plane are achieved, the telescopic ends of the first force application part and the second force application part are intersected to enable the force applied by the first force application part and the force applied by the second force application part to act on the intersection, and therefore the real stress condition is shown. One end of the force transmission structure is rotatably connected with the single pile, and the other end of the force transmission structure is connected with the intersection of the first force application part and the second force application part, so that the force at the intersection is transmitted to the single pile, the single pile is subjected to forces from different directions and different sizes in the same plane in the reaction frame, and then real stress environments such as wind power and the like of the single pile in the sea are simulated, so that testers can obtain accurate simulation results under the real stress conditions, and better design and optimization are performed.
2. The invention provides a supergravity simulation device for an offshore wind turbine foundation under the action of wind load, wherein a force transmission structure comprises a force transmission rod and a force application rod, one end of the force application rod, which faces a single pile, is a spherical end, the other end of the force application rod is connected with the intersection of a first force application part and a second force application part, one end of the force transmission rod is provided with a flange, the other end of the force transmission rod is provided with an open spherical accommodating space, the spherical accommodating space is in coordinated contact with the spherical end, and the telescopic end of the first force application part and the telescopic end of the second force application part respectively extend or retract to form periodic force acting on the single pile. The spherical end of application of force pole coordinates the contact with the spherical accommodation space of dowel steel, the rotation contact between application of force pole and dowel steel has been realized, make the power of being transmitted by the crossing department of first application of force spare and second application of force spare, transmit spherical accommodation space through spherical end on, simultaneously, when the axis of application of force pole and the axis of dowel steel appear inclining (promptly, the axis of application of force pole and the axis of dowel steel are not on same straight line), the form of coordination contact also can transmit the power of the crossing department of first application of force spare and second application of force spare for the dowel steel. In addition, compared with an integral device consisting of a reaction frame, a force application part and a single pile, the spherical end and the spherical containing space are small in size, and force transmission can be carried out at one point simply at the spherical end and the spherical containing space under the condition of meeting the stress analysis and test conditions. The telescopic end of the first force application member and the telescopic end of the second force application member extend or retract respectively to simulate forces in different directions and different sizes respectively, so that periodic forces (the periodic force can be in forms of sine, cosine and the like) of wind loads acting on a single pile are simulated, the number of times of reciprocating cyclic loads is carried out, and testers are helped to observe the change condition of soil bodies around the pile.
3. According to the offshore wind turbine foundation supergravity simulation device under the wind load action, the gap is formed between the flange plate of the force transmission rod and the upper surface of the single pile, so that the upper surface of the single pile cannot rigidly collide with the flange plate of the force transmission rod when the single pile inclines, the interference of the force transmission rod on the inclination of the single pile in a test is further reduced, and the precision of the test result is improved.
4. The invention provides a supergravity simulation device of an offshore wind turbine foundation under the action of wind load, wherein a force transmission structure further comprises a connecting rod, the connecting rod is fixedly connected with a flange plate, a linear bearing is arranged between the connecting rod and a single pile, and the linear bearing is used for ensuring the stable transmission of force between the single pile and the connecting rod.
5. According to the supergravity simulation device for the offshore wind turbine foundation under the wind load, the first upright post and the second upright post are respectively provided with the mounting holes, the mounting end of the first force application member and the mounting end of the second force application member are respectively arranged in the mounting holes, and the stroke of the telescopic ends of the first force application member and the second force application member is increased under the condition that the size of the reaction frame is not increased. Meanwhile, the size of the reaction frame can be reduced, so that the reaction frame is utilized to the maximum extent, and the structure of the whole device is more compact.
6. The invention provides a supergravity simulation device of an offshore wind turbine foundation under the action of wind load, which further comprises a fixing structure sleeved on the periphery of a force application rod, wherein the fixing structure comprises a supporting plate and a movable plate, and the supporting plate is detachably connected with a fixing plate at the top of a reaction frame so as to realize the detachment and installation of the fixing structure and the reaction frame. The supporting plate is arranged between the top plate and the movable plate and is in sliding connection with the movable plate so as to realize the relative movement between the supporting plate and the movable plate.
7. According to the supergravity simulation device for the offshore wind turbine foundation under the wind load action, the movable plate is rotatably provided with at least one ball towards the surface of the supporting plate, and the ball is in point contact with the supporting plate, so that the supporting plate and the movable plate can move relatively through the ball, and the friction force between the supporting plate and the movable plate is reduced to the greatest extent.
8. The invention provides a supergravity simulation device of an offshore wind turbine foundation under the action of wind load, which further comprises an induction structure, wherein the induction structure comprises a displacement sensor and a force sensor, and the first force application member and the second force application member are respectively provided with the displacement sensor and the force sensor so as to measure the force and the displacement of the first force application member and the second force application member.
9. The invention provides a supergravity simulation device of an offshore wind turbine foundation under the action of wind load, wherein a sensing structure further comprises at least one strain sensor and at least one soil pressure sensor, the strain sensor is arranged on a single pile, the soil pressure sensor is arranged in a saturated soil layer around the single pile, and testers obtain the property and state changes of the single pile and the saturated soil layer around the single pile through the strain sensor and the soil pressure sensor.
10. The invention provides a device for simulating the super-gravity of an offshore wind turbine foundation under the action of wind load, which further comprises a centrifugal machine, wherein a hanging basket is arranged in the centrifugal machine, a reaction frame is fixedly arranged in the hanging basket, and when the centrifugal machine rotates, the reaction frame in the hanging basket, a barrel body in the reaction frame, a saturated soil layer, a force transmission structure and the like can bear the super-gravity (the super-gravity refers to N times of the gravity) so as to reproduce a pile-surrounding soil body stress field of a single pile in the sea bottom.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic structural diagram of a supergravity simulation apparatus for a foundation of an offshore wind turbine under wind load according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of a fastening structure provided in an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a first force application member, a second force application member, a support plate and a dowel bar provided in an embodiment of the present invention;
fig. 4 is a schematic structural view of a first force application member, a second force application member, a supporting plate and a movable plate provided in the embodiment of the present invention;
FIG. 5 is a schematic diagram of a force transfer structure provided in an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a supergravity simulation apparatus for a foundation of an offshore wind turbine under wind load according to an embodiment of the present invention;
fig. 7 is a front view of a supergravity simulation apparatus for a foundation of an offshore wind turbine under wind load according to an embodiment of the present invention.
Description of reference numerals: 1. a reaction frame; 2. single pile; 3. a barrel body; 4. a first force application member; 5. a second force application member; 6. a support plate; 7. a fixing plate; 8. a dowel bar; 9. a flange plate; 10. a base plate; 11. a connecting rod; 12. a linear bearing; 13. a movable plate; 14. a force application rod; 15. a spherical end; 16. a cross beam; 17. and (7) mounting the plate.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
One specific embodiment of the supergravity simulation device for an offshore wind turbine foundation under wind load as shown in fig. 1 to 7 includes: reaction frame 1, reaction frame 1 are equipped with relative bottom plate 10 and the cross crossbeam 16 that sets up, are equipped with first stand, second stand, third stand, fourth stand and staving 3 on the bottom plate 10 fixedly, with the application of force structure that staving 3 set up relatively, be used for holding saturated soil layer, partial single pile 2 who inserts in the saturated soil layer in the staving 3 to and the biography power structure that one end and application of force structural connection, the other end and single pile 2 are connected.
In order to further reduce the overall mass of the reaction frame 1, as shown in fig. 1, 2, 6 and 7, the first upright, the second upright, the third upright and the fourth upright are all square hollow section steel, the cross beam 16 is formed by welding the hollow section steel, and the cross beam 16 is fixedly connected with the uprights through bolts.
As shown in fig. 3 and 4, the force application structure includes a first force application member 4 and a second force application member 5 which are vertically arranged, wherein the first force application member 4 and the second force application member 5 are respectively arranged in parallel with the bottom plate 10 to ensure that the first force application member 4 and the second force application member 5 are on the same plane. Specifically, the first force application member 4 and the second force application member 5 are both actuators. The fixed end of the first force application part 4 is fixedly connected with the first upright column, the fixed end of the second force application part 5 is fixedly connected with the second upright column, and the telescopic ends of the first force application part 4 and the second force application part 5 are crossed. In order to utilize the space of the reaction frame 1 to the maximum extent, the first upright column and the second upright column are respectively provided with a mounting hole, and the mounting end of the first force application member 4 and the mounting end of the second force application member 5 are respectively arranged in the mounting holes. In order to fix the first force application member 4 and the second force application member 5, the first force application member 4 and the second force application member 5 are respectively fixedly connected with the cross beam 16 through a mounting plate 17.
As shown in fig. 4, 5 and 6, the force transmission structure comprises a force application rod 14, a force transmission rod 8 and a connecting rod 11 which are connected in sequence. As shown in fig. 3 and 4, one end of the force application rod 14 facing the mono pile 2 is a spherical end 15, and the other end is connected with the intersection of the telescopic ends of the first force application member 4 and the second force application member 5. As shown in fig. 5, one end of the dowel bar 8 is a spherical receiving space with an opening, the spherical receiving space is in cooperative contact with the spherical end 15, and the flange 9 at the other end is fixedly connected with the connecting rod 11. In order to avoid the influence on the test result caused by the rigid collision between the flange 9 and the upper surface of the single pile 2, a gap is reserved between the flange 9 and the upper surface of the single pile 2. To ensure that the forces are transmitted accurately to the mono pile 2, a linear bearing 12 is provided between the connecting rod 11 and the mono pile 2, as shown in fig. 6.
For supporting the telescopic ends of the first force application member 4 and the second force application member 5, as shown in fig. 3 and 4, the device further comprises a fixing structure sleeved on the periphery of the force application rod 14, the fixing structure comprises a supporting plate 6 and a movable plate 13, wherein the supporting plate 6 is detachably connected with a fixing plate 7 arranged on a cross beam 16 at the top of the reaction frame 1 through bolts, and the movable plate 13 is located between the fixing plate 7 and the supporting plate 6. To minimize the frictional force between the pallet 6 and the movable plate 13, a plurality of balls are rotatably provided on the surface of the movable plate 13 facing the pallet 6 such that the balls make point contact with the pallet 6.
For the size and the direction of accurate control power, still include the response structure, the response structure includes displacement sensor and force sensor, all is equipped with displacement sensor and force sensor on first application of force piece 4, the second application of force piece 5. For observing 2 pile foundations of single pile saturation soil layer strain on every side, response structure still includes at least one strain transducer and at least one soil pressure sensor, and strain transducer locates on single pile 2, and soil pressure sensor locates in the 2 pile foundations of single pile saturation soil layer on every side.
Still include centrifuge, centrifuge is equipped with the hanging flower basket, and reaction frame fixed mounting is in the hanging flower basket. In order to accurately control the test, the device further comprises a controller and a display, wherein the controller is respectively connected with the first force application part 4, the second force application part 5, the induction structure, the centrifuge and the like through signals, and the display is used for displaying the signals received by the controller.
In the test process, after the centrifugal machine is started, the reaction frame positioned in the hanging basket is wholly in a supergravity state, namely, the state of the saturated soil layer near the single-pile 2 pile foundation in the hanging basket is the same as the state of the saturated soil layer near the single-pile 2 pile foundation in the seabed. Based on a centrifugal model test similar theory, the controller controls the first force application member 4 and the second force application member 5 to simulate the cyclic load according to a preset numerical value, the sensing structure is in signal connection with the controller and continuously and respectively feeds back the directions and the magnitudes of the first force application member 4 and the second force application member 5, the resultant force of the first force application member 4 and the second force application member 5 is transmitted to the force transmission rod 8 through the coordinated contact of the force application rod 14 and the force transmission rod 8, and then is transmitted to the single pile 2 through the connecting rod 11, so that the wind load effect of the single pile 2 in the real marine environment can be accurately simulated. Along with the increase of test time, the increase of cyclic load number of times, the effect that single pile 2 receives the power leads to near the saturated soil layer of pile foundation to appear changing, and the pile body takes place the slope, and the inductor that meets an emergency in time gives the controller with the change signal transmission to help the testing personnel in time to know the process of change, in order to obtain the simulation result who is close to true operating mode.
The supergravity simulation device for the offshore wind turbine foundation under the action of the wind load has a compact structure, can accurately simulate the actual working condition under the action of a supergravity field, and improves the accuracy of the test.
As an alternative embodiment, the first force application member and the second force application member may also be hydraulic cylinders or air cylinders or telescopic rods.
As an alternative embodiment, the number of force application members may also be 1, 3, 4 or even more, a plurality of force application members being provided around the periphery of the mono pile 2.
As an alternative embodiment, the number of columns may also be 3, 5, 6 or even more.
As an alternative embodiment, the number of strain sensors may also be 2, 3, 4 or even more.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the spirit or scope of the invention.
Claims (9)
1. The utility model provides an offshore wind turbine basis hypergravity analogue means under wind load effect which characterized in that includes:
the reaction frame (1), the reaction frame (1) is provided with a bottom plate (10), a first upright post, a second upright post and a barrel body (3) are fixedly arranged on the bottom plate (10), and the barrel body (3) is used for accommodating a saturated soil layer;
a mono-pile (2), said mono-pile (2) being partially inserted into said saturated soil layer;
the force application structure is arranged opposite to the barrel body (3) and comprises at least two first force application pieces (4) and second force application pieces (5) which are arranged in an intersecting manner, the first force application pieces (4) and the second force application pieces (5) are respectively arranged in parallel with the bottom plate (10), the fixed end of each first force application piece (4) is fixedly connected with the first upright post, the fixed end of each second force application piece (5) is fixedly connected with the second upright post, and the telescopic ends of the first force application pieces (4) and the second force application pieces (5) are intersected;
one end of the force transmission structure is rotatably connected with the single pile (2), the other end of the force transmission structure is connected with the intersection of the first force application part (4) and the second force application part (5), the force transmission structure comprises a force transmission rod (8) and a force application rod (14), one end, facing the single pile (2), of the force application rod (14) is a spherical end (15), the other end of the force application rod is connected with the intersection of the first force application part (4) and the second force application part (5), one end of the force transmission rod (8) is provided with a flange plate (9), the other end of the force transmission rod is a spherical accommodating space provided with an opening, the spherical accommodating space is in coordination contact with the spherical end (15), and the telescopic end of the first force application part (4) and the telescopic end of the second force application part (5) extend or retract respectively to form a periodic force acting on the single pile (2).
2. The device for simulating the foundation hypergravity of an offshore wind turbine under the action of wind load according to claim 1, wherein a gap is formed between the flange (9) of the dowel bar (8) and the upper surface of the single pile (2).
3. The device for simulating the foundation hypergravity of the offshore wind turbine under the action of the wind load according to claim 2, wherein the force transmission structure further comprises a connecting rod (11), the connecting rod (11) is fixedly connected with the flange (9), and a linear bearing (12) is arranged between the connecting rod (11) and the single pile (2).
4. The offshore wind turbine foundation hypergravity simulation device under wind load effect of claim 1, characterized in that a first upright column and a second upright column are respectively provided with a mounting hole, and a mounting end of the first force application member (4) and a mounting end of the second force application member (5) are respectively arranged in the mounting holes.
5. The offshore wind turbine foundation hypergravity simulation device under wind load effect of claim 1, further comprising a fixing structure sleeved on the periphery of the force application rod (14), wherein the fixing structure comprises a supporting plate (6) and a movable plate (13), the supporting plate (6) is detachably connected with a fixing plate (7) on the top of the reaction frame (1), the movable plate (13) is arranged between the fixing plate (7) and the supporting plate (6), and the supporting plate (6) is slidably connected with the movable plate (13).
6. The device for simulating the foundation hypergravity of a offshore wind turbine under wind load according to claim 5, characterized in that the surface of the movable plate (13) facing the supporting plate (6) is provided with at least one ball in rotation, and the ball is in point contact with the supporting plate (6).
7. The device for simulating the foundation hypergravity of the offshore wind turbine under the action of the wind load according to any one of claims 1 to 6, further comprising a sensing structure, wherein the sensing structure comprises a displacement sensor and a force sensor, and the first force application member (4) and the second force application member (5) are both provided with the displacement sensor and the force sensor.
8. The offshore wind turbine foundation hypergravity simulation device under wind load effect of claim 7, characterized in that said sensing structure further comprises at least one strain sensor and at least one soil pressure sensor, said strain sensor is provided on said mono-pile (2), said soil pressure sensor is provided in a saturated soil layer around the pile foundation of the mono-pile (2).
9. The device for simulating the foundation hypergravity of the offshore wind turbine under the action of the wind load according to claim 8, further comprising a centrifuge, wherein a hanging basket is arranged in the centrifuge, and the reaction frame (1) is fixedly arranged in the hanging basket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210838902.7A CN114908819B (en) | 2022-07-18 | 2022-07-18 | Supergravity simulation device for offshore wind turbine foundation under wind load effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210838902.7A CN114908819B (en) | 2022-07-18 | 2022-07-18 | Supergravity simulation device for offshore wind turbine foundation under wind load effect |
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