CN111779154A - Buckling-shearing type metal damper applied to shock insulation layer - Google Patents

Buckling-shearing type metal damper applied to shock insulation layer Download PDF

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Publication number
CN111779154A
CN111779154A CN202010822906.7A CN202010822906A CN111779154A CN 111779154 A CN111779154 A CN 111779154A CN 202010822906 A CN202010822906 A CN 202010822906A CN 111779154 A CN111779154 A CN 111779154A
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China
Prior art keywords
connecting plate
shock insulation
cylinder
plate
lower connecting
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Pending
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CN202010822906.7A
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Chinese (zh)
Inventor
李虎
杜永峰
李芳玉
韩博
张超
王光环
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Lanzhou University of Technology
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Lanzhou University of Technology
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Priority to CN202010822906.7A priority Critical patent/CN111779154A/en
Publication of CN111779154A publication Critical patent/CN111779154A/en
Pending legal-status Critical Current

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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62Insulation or other protection; Elements or use of specified material therefor
    • E04B1/92Protection against other undesired influences or dangers
    • E04B1/98Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04HBUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H9/00Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
    • E04H9/02Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04HBUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H9/00Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
    • E04H9/02Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
    • E04H9/021Bearing, supporting or connecting constructions specially adapted for such buildings

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Environmental & Geological Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Buildings Adapted To Withstand Abnormal External Influences (AREA)
  • Vibration Prevention Devices (AREA)

Abstract

Be applied to bucking-shearing type metal damper on shock insulation layer, a shock insulation layer part for shock insulation building belongs to engineering structure and subtracts shock insulation technical field, including a ripple section of thick bamboo (1), upper junction plate (2), lower connecting plate (3), annular fagging (4), L shape connecting piece (5), a ripple section of thick bamboo (1) and upper junction plate (2), lower connecting plate (3) and annular fagging (4) consolidation constitution attenuator part, L shape connecting piece (5) are fixed on pier (9) on shock insulation layer, upper junction plate (2) link firmly with L shape connecting piece (5), lower connecting plate (3) link firmly with shock insulation support lower junction plate (6). When the upper buttress (9) moves horizontally, the upper connecting plate (2) moves along with the upper buttress (9), the corrugated cylinder (1) generates tension-compression buckling deformation and bending-shearing deformation, damping and lateral stiffness can be provided for the shock insulation layer in any horizontal direction, the deformation of the shock insulation layer is inhibited, energy is dissipated, and therefore the upper structure is protected.

Description

Buckling-shearing type metal damper applied to shock insulation layer
Technical Field
The invention relates to an engineering structure seismic isolation and reduction technology which is mainly used for seismic isolation and energy consumption of building structures.
Background
The engineering seismic isolation and absorption technology is one of major innovation achievements in the field of seismic engineering for nearly half a century. The seismic isolation and reduction device is additionally arranged in a building structure, so that the response of the structure under the action of an earthquake can be effectively reduced, the seismic performance and the disaster resistance of the structure are obviously improved, and the seismic isolation and reduction device is widely applied to actual engineering.
Ordinary metal shear type dampers, friction type dampers, viscous dampers and the like usually only play a role in the arrangement direction thereof, but have a small or even no role in other directions, so that a certain number of dampers must be arranged simultaneously in the longitudinal and transverse directions of the structure in actual engineering. In addition, the deformation capacity of the common metal shear type damper and the friction type damper is small, and the large deformation requirement of the shock insulation layer is difficult to meet.
A large number of lead core rubber supports are used in seismic isolation buildings, and the mass production and use of lead bring considerable pressure to social environment. In order to avoid the problem of environmental risk caused by heavy metal lead, other novel environment-friendly damping devices are developed, and the damping devices, such as the natural rubber support, the friction sliding support, the friction pendulum support and the like, form a composite shock insulation system, and have important significance in popularization and application in actual engineering.
Disclosure of Invention
The invention aims to provide a buckling-shearing type metal damper applied to a seismic isolation layer.
The invention relates to a buckling-shearing type metal damper applied to a seismic isolation layer, which comprises a corrugated cylinder 1, an upper connecting plate 2, a lower connecting plate 3, an annular supporting plate 4 and an L-shaped connecting piece 5, wherein the corrugated cylinder 1, the upper connecting plate 2, the lower connecting plate 3 and the annular supporting plate 4 are fixedly connected to form a damper part; the upper connecting plate 2 and the L-shaped connecting piece 5 are fixedly connected through a high-strength bolt 11; the lower connecting plate 3 and the lower connecting plate 6 of the shock insulation support are fixedly connected through a high-strength bolt 11.
The invention has the advantages that: (1) the horizontal all-directional performance is completely the same, and the deformability is strong: the corrugated tube has a special structure, and the tube wall is a corrugated curved surface, so that the tube is easy to buckle and deform during tension and compression, and can be stretched or compressed, thereby having larger horizontal deformation capability. Metal shear type dampers, friction dampers, viscous dampers, etc. commonly used in building structures are generally effective only in their arrangement direction, and must be arranged in both the longitudinal and transverse directions of the structure when applied. The buckling-shearing metal damper provided by the invention has completely same mechanical properties in all horizontal directions, so that the directivity of the action of the damper does not need to be considered, and the utilization efficiency of the damper is improved. (2) Simple structure, it is removable: according to the invention, metal materials such as the corrugated cylinder and the steel plate are connected in a high-strength bolt or welding mode, so that the process is mature and the operation is simple; the damper can be replaced in time after being greatly damaged or destroyed under the action of earthquakes and the like, so that the seismic isolation layer can be quickly restored to the seismic resistance level before the earthquakes. (3) Economy and environmental protection: compared with metals such as tin, lead and the like, the low-yield steel has low price and obvious economic benefit; the corrugated cylinder made of low-yield steel can replace the function of a lead core in the shock insulation support, the production and the use of heavy metal lead are reduced, the heavy metal lead is prevented from harming human health and polluting the environment, and the development concept of green, environmental protection and sustainability is met.
Drawings
Fig. 1 is a schematic view of a buckling-shearing type metal damper and longitudinal sections arranged on two sides of a seismic isolation support, fig. 2 is a three-dimensional schematic view of a corrugated cylinder, fig. 3 is a schematic view of planes of an upper connecting plate and a lower connecting plate, fig. 4 is a schematic view of a plane of an annular supporting plate, fig. 5 is a schematic view of splicing of the upper connecting plate, the lower connecting plate, the annular supporting plate and the corrugated cylinder, fig. 6 is a three-dimensional schematic view of an L-shaped connecting piece, fig. 7 is a schematic view of a plane of an upper connecting plate of the seismic isolation support, fig. 8 is a schematic view of a lower connecting plate of the seismic isolation support, fig. 9 is a schematic view of connection arranged at the bottom of a seismic isolation layer beam, fig. 10 is a schematic view of connection arranged between the seismic isolation layer beam and a base beam.
Reference numerals and corresponding names: 1-corrugated cylinder, 2-upper connecting plate, 3-lower connecting plate, 4-annular supporting plate, 5-L-shaped connecting piece, 6-lower connecting plate of vibration isolation support, 7-upper connecting plate of vibration isolation support, 8-vibration isolation support, 9-upper buttress, 10-lower buttress, 11-high-strength bolt, 12-embedded bolt, 13-profile steel connecting piece, 14-vibration isolation layer beam, 15-foundation beam and 16-other vibration isolation device.
Detailed Description
As shown in figure 1, the invention is a buckling-shearing type metal damper applied to a seismic isolation layer, and comprises a corrugated cylinder 1, an upper connecting plate 2, a lower connecting plate 3, an annular supporting plate 4 and an L-shaped connecting piece 5, wherein the corrugated cylinder 1, the upper connecting plate 2, the lower connecting plate 3 and the annular supporting plate 4 are fixedly connected to form a damper part; the upper connecting plate 2 and the L-shaped connecting piece 5 are fixedly connected through a high-strength bolt 11; the lower connecting plate 3 and the lower connecting plate 6 of the shock insulation support are fixedly connected through a high-strength bolt 11.
As shown in fig. 2, the corrugated cylinder 1 is made of low yield steel, the wall corrugations of the middle cylinder are in a semi-arc shape, the corrugations are periodically arranged along the height of the cylinder body, and two adjacent semi-arc corrugations are in central symmetry; the ripple of the cylinder wall close to the two ends is 1/4 circular arcs, the cylinder wall at the two ends is in a straight cylinder shape, and the height of the straight cylinder part is consistent with the thickness of the upper connecting plate 2 and the lower connecting plate 3; the cross section of the corrugated cylinder 1 is circular, the circular cross section is continuously and periodically changed along the height of the cylinder body, and the structure and the mechanical property of the corrugated cylinder 1 in each horizontal direction are completely the same.
As shown in fig. 3, the upper connecting plate 2 and the lower connecting plate 3 are identical and made of common steel, the plane is square, a large-diameter round hole is formed in the center, the diameter of the round hole is equal to the outer diameter of the straight section cylinder wall of the corrugated cylinder 1, and connecting bolt holes are reserved in four corners.
As shown in fig. 4, the annular supporting plate 4 is made of common steel, the plane is annular, and the outer diameter of the annular is equal to the inner diameter of the straight section wall of the corrugated pipe 1.
As shown in fig. 6, the L-shaped connecting member 5 is made of a common steel material, two rectangular steel plates are vertically spliced into an L shape, a triangular rib plate is arranged in the middle of an inner angle, the two rectangular steel plates and the triangular rib plate are welded into a whole, and a bolt connecting hole is reserved at the corner of each rectangular steel plate; one rectangular steel plate is fixedly connected with the upper buttress 9 through the embedded bolt 12, and the other rectangular steel plate is fixedly connected with the upper connecting plate 2 through the high-strength bolt 11.
As shown in fig. 7, the upper connection plate 7 of the isolation bearing is made of common steel, the plane is square, the middle part of the upper connection plate is fixedly connected with the isolation bearing 8, and bolt connection holes are reserved at four corners of the upper connection plate and fixedly connected with the upper pier 9.
As shown in fig. 8, the lower connection plate 6 of the vibration isolation support is made of common steel, two rectangular steel plates extend out of two sides of the upper connection plate 7 of the vibration isolation support, and bolt connection holes are reserved at four corners of the rectangular steel plates for fixing the lower connection plate 3 of the damper; the middle part is fixedly connected with the shock insulation support 8, and bolt connecting holes are reserved at four corners and fixedly connected with the lower pier 10.
The shock insulation support 8 is a natural rubber support, and the buckling-shearing type metal damper and the natural rubber support are combined to form a novel composite shock insulation system.
When the buckling-shearing type metal damper is assembled, one end of the corrugated cylinder 1 is clamped between the upper connecting plate 2 and the annular supporting plate 4, the other end of the corrugated cylinder is clamped between the lower connecting plate 3 and the annular supporting plate 4, and the corrugated cylinder 1, the upper connecting plate 2, the lower connecting plate 3 and the annular supporting plate 4 are welded to form a damper component; when the damper part is installed, one side of the L-shaped connecting piece 5 is fixed on an upper pier 9 of a shock insulation layer through the embedded bolt 12, the other side of the L-shaped connecting piece 5 is fixedly connected with the upper connecting plate 2 of the damper, and the lower connecting plate 3 of the damper is fixedly connected with the lower connecting plate 6 of the shock insulation support.
The buckling-shearing type metal damper can be arranged on one side, two sides and periphery of the seismic isolation support 8 or between the seismic isolation layer beam 14 and the foundation beam 15. Under the action of earthquake, wind load and the like, the upper structure generates horizontal reciprocating motion, the upper connecting plate 2 of the damper horizontally moves along with the upper buttress 9, and the corrugated cylinder 1 generates tensile-compression buckling deformation along the cylinder shaft direction and bending-shearing deformation along the horizontal direction; the larger the horizontal deformation of the shock insulation support 8 is, the stronger the buckling degree and shearing action of the wall corrugation of the cylinder are, the larger the horizontal deformation of the damper is, and the more the dissipated energy is; the continuous tension-compression buckling deformation and the horizontal shearing action of the cylinder wall jointly provide lateral force resistance and horizontal rigidity for the shock insulation layer, and energy is also dissipated, so that the upper structure is protected, and the large deformation requirement of the shock insulation layer is met.
The buckling-shearing type metal damper provided by the invention has the performances of large deformation, high resistance, high energy consumption, easiness in resetting and the like. The mechanical properties of the buckling-shearing type metal damper are illustrated, and as shown in fig. 12, the buckling-shearing type metal damper is a force-displacement relation curve of a single buckling-shearing type metal damper with a certain specification under low-cycle reciprocating cyclic loading, and the damper is made of low-yield steel LY 225. As can be seen from fig. 12, as the horizontal loading displacement increases, the bearing capacity of the damper is significantly improved, the hysteresis loop area is significantly increased, and the energy consumption capability is enhanced; the rigidity of the damper is larger before yielding, and the rigidity is reduced after yielding; the unloading rigidity of the damper is high, the negative rigidity characteristic appears after the damper is unloaded quickly, the resetting force is low, the damper has a certain self-resetting function and is easy to reset, and when the damper is combined with a natural rubber support for use, the natural rubber support can be reset by the self-restoring force of the natural rubber support, so that the residual deformation of the shock insulation layer is reduced.
In order to make the purpose, operation mechanism and advantages of the present invention more clear, the embodiments of the present invention will be described with reference to fig. 1 to 11.
Example 1: arranging on two sides of the shock insulation support:
as shown in fig. 1, a buckling-shearing type metal damper comprises a corrugated cylinder 1, an upper connecting plate 2, a lower connecting plate 3, a ring-shaped supporting plate 4, an L-shaped connecting piece 5 and the like;
(1) one end of the corrugated cylinder 1 is clamped between the upper connecting plate 2 and the annular supporting plate 4, as shown in fig. 5, the edge of the corrugated cylinder 1 is flush and coplanar with the upper surfaces of the upper connecting plate 2 and the annular supporting plate 4, and the three are welded and fixed at the splicing position of the upper surfaces. In a similar way, the other end of the corrugated cylinder 1 is welded and fixed with the lower connecting plate 3 and the annular supporting plate 4 to form a damper component;
(2) the L-shaped connecting piece 5 is fixed on the upper buttress 9 through the embedded bolt 12. When the buttress 9 is poured, connecting bolts are embedded in the buttress in advance, or after the pouring is finished, expansion bolts are arranged on the buttress for connection;
(3) fixing the lower connecting plate 3 on rectangular steel plates at two sides of the lower connecting plate 6 of the seismic isolation support through high-strength bolts 11;
(4) the upper connecting plate (2) is fixedly connected with the L-shaped connecting piece (5) through a high-strength bolt (11);
and repeating the above 4 steps to realize the installation of the damper on the other side of the vibration isolation support 8. The composite shock isolation system formed by combining the buckling-shearing type metal damper and the natural rubber support can replace a lead core rubber support shock isolation system, so that the production and the use of heavy metal lead are reduced, and the shock isolation system is more economical, green and environment-friendly. The using quantity and specification of the dampers in the composite shock insulation system are calculated and determined according to the lateral stiffness resistance and energy consumption requirements of the shock insulation layer.
Example 2: arranging at the bottom of a seismic isolation layer beam:
the buckling-shearing type metal damper can be directly installed at the bottom of the seismic isolation layer beam 14.
When the specification of the damper is small, as shown in fig. 9, the upper connecting plates 2 of a plurality of damper components arranged in parallel are fixed at the bottom of the seismic isolation layer beam 14 through embedded bolts 12, the lower connecting plates 3 of the damper components are fixedly connected with the foundation beam 15 through profile steel connecting pieces 13, the lower connecting plates 3 are fixedly connected with the profile steel connecting pieces 13 through high-strength bolts 11, and the profile steel connecting pieces 13 are fixedly connected with the foundation beam 15 through the embedded bolts 12.
When the specification of the damper is large, as shown in fig. 10, the upper connecting plate 2 of the damper is fixed at the bottom of the seismic isolation layer beam 14 through the embedded bolt 12, and the lower connecting plate 3 of the damper is directly connected and fixed with the foundation beam 15 through the embedded bolt 12.
When the buckling-shearing type metal damper is arranged between the seismic isolation layer beam 14 and the foundation beam 15, the buckling-shearing type metal damper can also work in cooperation with the seismic isolation support 8 to form a composite seismic isolation system, the seismic isolation support 8 is mainly used for supporting an upper structure, and the damper provides the required functions of damping, lateral force resistance, rigidity, limiting and the like for a seismic isolation layer. For a base isolation structure with an irregular plane, the damper can be flexibly arranged at a position with larger deformation of the isolation layer to control the torsional response of the upper structure, reduce the deformation of the isolation layer and prevent the displacement of the isolation support 8 from exceeding the limit.
Example 3: arranging the seismic isolation layers in other seismic isolation systems:
the buckling-shearing type metal damper provided by the invention can be combined with other vibration isolation devices 16 for use, such as a friction sliding vibration isolation support, a friction pendulum vibration isolation support and the like. Similarly, the 4 operation steps in embodiment 1 are repeated, and the dampers can be arranged on one side, two sides and the periphery of other vibration isolation devices 16; the operation of example 2 was repeated, and the damper could be disposed at the bottom of the seismic isolation layer beam of another seismic isolation system, as shown in fig. 11. The composite shock insulation system is formed by combining the buckling-shearing type metal damper and a friction sliding shock insulation support or a friction pendulum shock insulation support, and the damper can provide high damping and lateral force resistance for a shock insulation layer and has the functions of energy consumption, limiting and the like.
The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiment, and the present invention shall fall within the protection scope of the present invention as long as the technical effects of the present invention are achieved by the same means.

Claims (6)

1. Be applied to bucking-shearing type metal damper on shock insulation layer, including bellows (1), upper junction plate (2), lower connecting plate (3), annular fagging (4), L shape connecting piece (5), its characterized in that: the upper connecting plate (2) is parallel to the lower connecting plate (3), one end of the corrugated cylinder (1) is fixedly connected with the upper connecting plate (2) and the annular supporting plate (4), and the other end of the corrugated cylinder is fixedly connected with the lower connecting plate (3) and the annular supporting plate (4); the upper connecting plate (2) is fixedly connected with the L-shaped connecting piece (5) through a high-strength bolt (11); the L-shaped connecting piece (5) is fixedly connected with the upper pier (9) through an embedded bolt (12); the lower connecting plate (3) is fixedly connected with the lower connecting plate (6) of the shock insulation support through a high-strength bolt (11).
2. The buckling-shearing type metal damper applied to seismic isolation layers as claimed in claim 1, wherein: the wall corrugation of the middle part of the corrugated cylinder (1) is in a semi-arc shape, the corrugations are periodically arranged along the height of the cylinder body, and two adjacent semi-arc corrugations are in central symmetry; the ripple of the cylinder wall close to the two ends is 1/4 circular arcs, the cylinder wall at the two ends is in a straight cylinder shape, and the height of the straight cylinder section is consistent with the thickness of the upper connecting plate (2) and the lower connecting plate (3); the cross section of the corrugated cylinder (1) is circular, the circular cross section is continuously and periodically changed along the height of the cylinder body, and the structure and the performance of the corrugated cylinder (1) in all horizontal directions are completely the same.
3. The buckling-shearing type metal damper applied to seismic isolation layers as claimed in claim 1, wherein: the upper connecting plate (2) and the lower connecting plate (3) are square steel plates, a large-diameter round hole is formed in the center, and the diameter of the round hole is equal to the outer diameter of the straight cylinder section cylinder wall of the corrugated cylinder (1).
4. The buckling-shearing type metal damper applied to seismic isolation layers as claimed in claim 1, wherein: the annular supporting plate (4) is an annular steel plate, and the outer diameter of the annular steel plate is equal to the inner diameter of the wall of the straight cylinder section of the corrugated cylinder (1).
5. The buckling-shearing type metal damper applied to seismic isolation layers as claimed in claim 1, wherein: the corrugated cylinder (1) is made of low-yield steel, one end of the corrugated cylinder (1) is clamped between the upper connecting plate (2) and the annular supporting plate (4), the other end of the corrugated cylinder is clamped between the lower connecting plate (3) and the annular supporting plate (4), and the corrugated cylinder (1) is welded with the upper connecting plate (2), the lower connecting plate (3) and the annular supporting plate (4) in a fixedly connecting mode.
6. The buckling-shearing type metal damper applied to seismic isolation layers as claimed in claim 1, wherein: the shock insulation support (8) is a natural rubber support, and the buckling-shearing type metal damper and the natural rubber support are combined to form a novel composite shock insulation system.
CN202010822906.7A 2020-08-17 2020-08-17 Buckling-shearing type metal damper applied to shock insulation layer Pending CN111779154A (en)

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Application Number Priority Date Filing Date Title
CN202010822906.7A CN111779154A (en) 2020-08-17 2020-08-17 Buckling-shearing type metal damper applied to shock insulation layer

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Application Number Priority Date Filing Date Title
CN202010822906.7A CN111779154A (en) 2020-08-17 2020-08-17 Buckling-shearing type metal damper applied to shock insulation layer

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115233832A (en) * 2022-07-21 2022-10-25 上海蓝科建筑减震科技股份有限公司 Repeatedly usable has tensile and two-way unhook formula device of anti-wind concurrently

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115233832A (en) * 2022-07-21 2022-10-25 上海蓝科建筑减震科技股份有限公司 Repeatedly usable has tensile and two-way unhook formula device of anti-wind concurrently

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