A composite vibration reduction device with inertia capacity and particle damping capable of absorbing energy through stacked collision

Abstract

The present invention discloses a composite vibration reduction device of inertia capacity and particle damping capable of absorbing energy by stacking collision, and relates to the technical field of energy absorption and vibration reduction of civil engineering structures. The device comprises a stacked parallel single particle damper, a gear rack type inertia capacity device, and a spring; the stacked parallel single particle damper comprises a box, particles, and a guide rail, the inner part of the box is divided into a plurality of cavities, each of which is provided with a particle, the guide rail is fixedly connected to the building structure, and the bottom of the box is slidably connected to the guide rail; the gear rack type inertia capacity device comprises a support, a rack, a plurality of gears, and a plurality of shafts, the rack and the gear are meshed for transmission, and then through the gear meshing transmission, the flywheel is finally driven to rotate, and the translational speed of the rack is converted into the rotational speed of the flywheel, generating inertial potential energy. The present invention can greatly reduce the number of particle damping used in the stacked parallel single particle damper, improve the friction and collision efficiency of the particles in the cavity, enhance the energy absorption capacity, reduce the vibration starting conditions, and improve the vibration reduction performance.

Description

Technical Field

[0001] The invention belongs to the technical field of energy dissipation and vibration reduction of civil engineering structures, and more specifically, relates to an inertia capacity-particle damping composite vibration reduction device capable of stacking collision energy dissipation. Background Art

[0002] In recent years, due to the frequent occurrence of natural disasters such as earthquakes and typhoons around the world, civil buildings and infrastructure in disaster-stricken cities have experienced significant shaking or even relatively obvious damage, which has prompted researchers in the field of civil engineering to pay more and more attention to the study of structural vibration control. Arranging energy dissipation and vibration reduction devices such as dampers in structures to achieve vibration reduction control is a typical technology and method, which is widely used in engineering practice due to its convenient construction and low cost. Among the above-mentioned vibration reduction technologies, particle dampers, as a new type of vibration reduction device, have the advantages of flexible arrangement, wide vibration reduction frequency band, strong robustness, and low cost. In recent years, they have received extensive attention and research from researchers in the engineering community.

[0003] According to the number of particles in the particle damper, it can be divided into single particle damper and multi-particle damper. The traditional single particle damper has poor practicality due to the large particle diameter and is difficult to meet engineering needs; the multi-particle damper has harsh start-up conditions, and the particles are prone to stacking effect during vibration, which restricts their own movement, resulting in low efficiency of momentum exchange between particles and controlled structures and poor shock absorption performance. In order to reduce the particle radius and improve the efficiency of momentum exchange between particles and controlled structures, researchers proposed a parallel one-way single particle damper, which is composed of multiple particles, each of which has an independent cavity, which can better improve the problems of traditional single particle dampers and multi-particle dampers and has good vibration reduction effect. However, the particle damper also has the disadvantages of excessive mass, large space occupation, and poor vibration reduction performance compared with other types of passive control devices. Therefore, it is urgent to further modify the particle damper, significantly reduce the mass of the required particle damping, improve the vibration reduction performance, and achieve a good lightweight vibration control effect.

[0004] The inertia device is a new type of structural control element that is dependent on the acceleration of both ends. Studies have shown that using it in combination with an energy dissipation and vibration reduction device can significantly improve the energy consumption efficiency of the traditional energy dissipation and vibration reduction device, and produce a significant apparent mass gain effect on the energy dissipation and vibration reduction device, which can better achieve the goal of lightweight structural vibration control. Summary of the invention

[0005] In order to solve the problems of limited energy dissipation capacity of particle dampers, difficulty in particle vibration, and excessive mass required, the present invention proposes a composite vibration reduction device of inertia capacity-particle damping that can dissipate energy through stacked collision. The vibration reduction device can greatly reduce the number of particle damping used in the stacked parallel single particle damper, improve the friction collision efficiency of particles in the cavity, enhance the energy dissipation capacity, reduce the vibration conditions, and improve the vibration reduction performance. The present invention is a new composite vibration reduction device of inertia capacity-particle damping that is suitable for various building structures and is used to resist the adverse effects of earthquakes, wind vibrations, etc. on buildings. Its function is to combine the gear rack inertia capacity device with the stacked parallel single particle damper and spring in series to form a complete dynamic system, and transmit the output generated by the inertia capacity device and the control force generated by the stacked parallel single particle damper to the structure through the spring, and the gear rack inertia capacity device rotates through the mutual meshing of gears to further increase the rotation speed, thereby accelerating the friction collision of particles in the cavity of the stacked parallel single particle damper, reducing the particle vibration conditions, increasing the energy dissipation efficiency, and improving the vibration reduction performance. At the same time, the inertia device enhances the apparent mass of the laminated parallel single particle damper, reduces the required particle mass, and makes it have a good lightweight structure vibration control effect.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A laminated collision energy dissipating inertia capacity-particle damping composite vibration reduction device, comprising a laminated parallel single particle damper, a gear rack type inertia capacity device, and a spring;

[0008] The stacked parallel single particle damper comprises a box, particles and a guide rail. The box is divided into a plurality of cavities from top to bottom. A particle is placed in each cavity and the particle can only move back and forth in one direction. The guide rail is arranged under the box and fixedly connected to the building structure. The bottom of the box is slidably connected to the guide rail.

[0009] The rack and pinion inertia device includes a support, a seventh gear, a rack, a fourth shaft, a sixth gear, a fifth gear, a second shaft, a third gear, a fourth gear, a second gear, a first shaft, a first gear, a third shaft, and a flywheel. The support is fixedly connected to the building structure. The rack is arranged at the bottom of the support and is fixedly connected to the box body. The support is slidably connected to the rack. The seventh gear is meshingly connected to the rack. The seventh gear is rotatably connected to the support through the fourth shaft. A sixth gear is also arranged behind the seventh gear. The sixth gear is rotatably connected to the support through the fourth shaft. The fifth gear is meshingly connected to the support above the sixth gear. The fifth gear is rotatably connected to the support through the second shaft. A third gear is arranged in front of the fifth gear. The third gear is rotatably connected to the support through the second shaft. The third gear is meshingly connected to the fourth gear below. The fourth gear is rotatably connected to the support through the first shaft. A second gear is arranged in front of the fourth gear. The second gear is rotatably connected to the support through the first shaft. The left side of the second gear is meshingly connected to the first gear. The first gear is rotatably connected to the support through the third shaft. A flywheel is arranged in front of the first gear. The flywheel is rotatably connected to the support through the third shaft.

[0010] The left end of the spring is fixedly connected to the support, and the right end of the spring is fixedly connected to the box body.

[0011] Preferably, the rack is an inverted T-shaped structure, the meshing teeth are arranged at the top in the middle of the inverted T-shaped structure, and two pressure plates are symmetrically arranged at the bottom of the support. The two pressure plates are respectively pressed on the two horizontal sides of the rack, and the rack slides along the slide groove formed by the two pressure plates.

[0012] Preferably, the pressure plate includes a horizontal portion and a vertical portion, the horizontal portion is vertically arranged to the vertical portion, the horizontal portion is fixedly connected to the top of the vertical portion, the horizontal portion presses on the horizontal side of the rack, and the vertical portion presses on the side surface of the horizontal side of the rack.

[0013] Preferably, the ratio of the outer diameter of the first gear to the outer diameter of the second gear is 1:1.1~1:2, the ratio of the outer diameter of the first gear to the outer diameter of the flywheel is 1:1~1:2, the ratio of the outer diameter of the first gear to the outer diameter of the seventh gear is 1:1~1:1.5, and the spring is an air spring.

[0014] Preferably, the aspect ratio of the cavities inside the box is 1:0.2-1:0.6, the width-to-height ratio is 1:1, the total height of the box and the length of the cavity are 1:0.2-1:1.5, lubricant is applied to the cavity, and the elastic modulus of the particles is 2.0×5N / mm 2 ~2.8×5N / mm 2 , the ratio of the total mass of the stacked parallel single particle damper to the total mass of the building structure is 1%~5%.

[0015] Preferably, the support is provided with a left side plate, a front side plate, a first partition plate, a second partition plate, and a rear side plate; the front side plate, the first partition plate, the second partition plate and the rear side plate are parallel to each other and vertically fixedly connected to the rear side plate, the rack and the seventh gear are both located between the first partition plate and the second partition plate, the fifth gear and the sixth gear are both located between the second partition plate and the rear side plate, the first gear, the second gear, the third gear and the fourth gear are all located between the front side plate and the first partition plate, and the flywheel is located in front of the front side plate; the left end of the spring is fixedly connected to the left side plate.

[0016] The beneficial effects of adopting the above technical solution are:

[0017] 1 The present invention transforms the traditional parallel one-way single particle damper to form a laminated parallel single particle damper, and combines the particle damper with a gear rack inertia device and a spring in series to form a laminated collision energy dissipation inertia-particle damping composite vibration reduction device, which significantly improves the friction collision efficiency of particles in each cavity of the particle damper, increases the particle collision energy dissipation, and better achieves a vibration reduction effect. The gear rack inertia device amplifies the apparent mass of the laminated parallel single particle damper, enabling it to effectively control the seismic response and wind-induced response of the main structure under a smaller particle mass, thereby achieving a lightweight structure vibration control effect.

[0018] 2 The present invention arranges the unidirectional single particle damper in parallel and in layers. When the parallel-type single particle damper moves back and forth through the lower slide rail under structural vibration, the impact force generated by the collision of particles in each cavity with the inner wall of the cavity can be uniformly transmitted to the vertical baffle of the inertia device fixed to the structure through the spring by the outer wall of the cavity arranged in parallel and in layers. The vertical baffle can transmit the impact force to the structure to achieve vibration reduction control of the structure. If the traditional parallel-type unidirectional single particle damper is combined with the gear rack inertia device and the spring to form a new inertia-particle damping device, only the outer wall of one cavity is connected to the spring and the rack of the inertia device. When the particles collide and generate impact force, only the outer wall of the cavity connected to the spring can transmit the impact force to the structure through the spring. The impact force generated by the collision of particles in the remaining cavities not connected to the spring cannot be smoothly transmitted to the structure, which greatly reduces the vibration reduction performance of the vibration reduction device. Compared with the traditional parallel unidirectional single particle damper, the stacked parallel single particle damper proposed in the present invention can fully exert the energy dissipation capacity of the particle damper after being combined with the inertia device and the spring, better dissipate the vibration energy transmitted to the particle damper by the structure, and greatly improve the vibration reduction performance of the particle damper.

[0019] 3 The present invention adopts a gear rack inertia device, which drives the flywheel to rotate at high speed through the meshing rotation between the gears, generating inertial potential energy. The inertia device can store energy and transfer the energy to the laminated parallel single particle damper connected to it, so that the reciprocating movement of the laminated parallel single particle damper is more intense, significantly reducing the particle vibration conditions, and driving the particles in the cavity to have more intense friction collision, increasing the particle collision energy consumption.

[0020] The present invention adopts a laminated parallel single particle damper, which is composed of multiple particles, but each particle has an independent cavity and can only move in one direction under the constraint of the side wall, which can better exert its vibration reduction control effect in the direction of structural vibration. At the same time, multiple cavities are arranged in parallel in vertical lamination, and the layout position is flexible, which solves the problem of large space occupation of traditional parallel unidirectional single particle dampers.

[0021] 5 The device of the present invention is convenient and flexible to set up, and each component is cheap and easy to obtain, with high cost performance. The composite vibration reduction device combining the particle damper and the inertia capacity device can effectively absorb and dissipate the energy of structural vibration, and has the characteristics of light weight, high energy efficiency, strong robustness, low space occupancy, etc., and has good promotion and application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of a composite vibration reduction device of inertia capacity and particle damping capable of absorbing energy by stacking collisions according to the present invention;

[0023] Figure 2 It is a schematic diagram of the main structure of a composite vibration reduction device of inertia capacity and particle damping capable of absorbing energy by stacking collisions according to the present invention;

[0024] Figure 3 It is a right-side structural schematic diagram of a laminated collision energy dissipation inertia capacity-particle damping composite vibration reduction device of the present invention;

[0025] Figure 4 It is a schematic diagram of the top view of the structure of a composite vibration reduction device of inertia capacity and particle damping capable of absorbing energy by stacking collisions according to the present invention;

[0026] Figure 5 It is a schematic diagram of the three-dimensional structure of a gear rack inertia capacity device in a composite inertia capacity-particle damping vibration reduction device capable of stacking collision energy dissipation according to the present invention;

[0027] Figure 6 It is a schematic diagram of the actual application state of a composite vibration reduction device of inertia capacity and particle damping capable of absorbing energy by stacking collisions of the present invention;

[0028] In the figure: 1. rack and pinion inertia device; 101. support; 1011. left side plate; 1012. front side plate; 1013. first partition plate; 1014. second partition plate; 1015. rear side plate; 102. flywheel; 103. first gear; 104. first shaft; 105. second gear; 106. second shaft; 107. third gear; 108. pressure plate; 109. rack; 110. third shaft; 111. fourth gear; 112. fifth gear; 113. fourth shaft; 114. sixth gear; 115. seventh gear; 2. spring; 3. laminated parallel single particle damper; 301. particle; 302. housing; 303. guide rail. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0030] In order to improve the vibration reduction performance of traditional particle dampers and achieve lightweight vibration control, the patent of the present invention proposes a composite vibration reduction device of inertia capacity-particle damping capable of stacking collision energy dissipation. The device is a reasonable improvement on the basis of traditional single particle dampers and parallel single particle dampers to form a stacked parallel single particle damper, and then creatively combines the particle damper with a gear rack inertia capacity device to achieve amplification of the acceleration of the two end points of the stacked parallel single particle damper device, accelerate particle collision, and greatly improve the energy consumption efficiency of the stacked parallel single particle damper. At the same time, the inertia capacity device can achieve the apparent mass efficiency of the particles of the stacked parallel single particle damper, which can significantly reduce the additional physical mass required by the mass unit of the stacked parallel single particle damper, so as to achieve a good lightweight vibration control effect. The present invention is suitable for various types of building structures to resist the adverse effects of earthquakes, wind vibrations, etc. on buildings.

[0031] Specific structure such as Figure 1-2 As shown, the laminated parallel single particle damper 3 includes a box 302, particles 301, and guide rails 303. The interior of the box 302 is divided into several cavities from top to bottom. A particle 301 is placed in each cavity, and the particle 301 can only move back and forth in one direction, which can better exert its vibration reduction control effect in the direction of structural vibration. At the same time, multiple cavities are arranged in parallel in vertical laminations, and the arrangement position is flexible, which solves the problem of large space occupation of traditional parallel unidirectional single particle dampers.

[0032] The guide rail 303 is arranged below the box 302 and fixedly connected to the building structure, and the bottom of the box 302 is slidably connected to the guide rail 303. The length-to-width ratio of the cavity is 1:0.2~1:0.6, and the width-to-height ratio is 1:1. Steel is selected as the material of the collision particle 301, and the elastic modulus is 2.0×105N / mm 2 ~2.8×105N / mm 2 , high hardness, high collision strength, and strong energy dissipation capacity. Lubricant is applied in the cavity to reduce the rolling friction of the particle 301, increase the collision probability between the particle 301 and the inner wall of the cavity, and improve the collision energy dissipation. The inner wall material of each laminated cavity is made of steel, which can greatly reduce the energy transfer loss caused by the collision between the particle 301 and the inner wall of the cavity. The number of cavities used in each laminated single particle damper can be set according to the vibration reduction requirements. After the laminated parallel arrangement, the total height of the box 302 and the cavity length ratio is 1:0.2~1:1.5. Too many cavities will cause the particle damper to overturn during the collision of the particle 301.

[0033] like Figure 1-5 As shown, the rack and pinion inertia device 1 includes a support 101, a seventh gear 115, a rack 109, a fourth shaft 113, a sixth gear 114, a fifth gear 112, a second shaft 106, a third gear 107, a fourth gear 111, a second gear 105, a first shaft 104, a first gear 103, a third shaft 110, and a flywheel 102. The support 101 is fixedly connected to the building structure, the rack 109 is arranged at the bottom of the support 101 and is fixedly connected to the box body 302, the support 101 is slidably connected to the rack 109, the seventh gear 115 is meshed and drivenly connected to the rack 109, the seventh gear 115 is rotatably connected to the support 101 through the fourth shaft 113, a sixth gear 114 is further arranged behind the seventh gear 115, the sixth gear 114 is rotatably connected to the support 101 through the fourth shaft 113, and the sixth gear 114 is rotatably connected to the support 101 through the fourth shaft 113. The upper part of 114 is meshingly connected to the fifth gear 112, and the fifth gear 112 is rotatably connected to the support 101 through the second shaft 106. A third gear 107 is provided in front of the fifth gear 112, and the third gear 107 is rotatably connected to the support 101 through the second shaft 106. The lower part of the third gear 107 is meshingly connected to the fourth gear 111, and the fourth gear 111 is rotatably connected to the support 101 through the first shaft 104. A second gear 105 is provided in front of the fourth gear 111, and the second gear 105 is rotatably connected to the support 101 through the first shaft 104. The left side of the second gear 105 is meshingly connected to the first gear 103, and the first gear 103 is rotatably connected to the support 101 through the third shaft 110. A flywheel 102 is provided in front of the first gear 103, and the flywheel 102 is rotatably connected to the support 101 through the third shaft 110.

[0034] Specifically, Figure 5As shown, the rack 109 is an inverted T-shaped structure, the meshing teeth are arranged at the top of the middle of the inverted T-shaped structure, and two pressing plates 108 are symmetrically arranged at the bottom of the support 101. The pressing plate 108 includes a horizontal portion and a vertical portion. The horizontal portion is vertically arranged with the vertical portion, and the horizontal portion is fixedly connected to the top of the vertical portion. The horizontal portion is pressed on the horizontal side of the rack 109, and the vertical portion is pressed on the side surface of the horizontal side of the rack 109. The rack 109 slides along the slide groove formed by the two pressing plates 108. The rack 109 is fixedly connected to the box body 302, and the box body 302 drives the rack 109 to move when it moves back and forth.

[0035] The support 101 is provided with a left side plate 1011, a front side plate 1012, a first partition plate 1013, a second partition plate 1014, and a rear side plate 1015. The front side plate 1012, the first partition plate 1013, the second partition plate 1014, and the rear side plate 1015 are parallel to each other and vertically fixedly connected to the rear side plate 1015. The rack 109 and the seventh gear 115 are both located between the first partition plate 1013 and the second partition plate 1014. The fifth gear 112 and the sixth gear 114 are both located between the second partition plate 1014 and the rear side plate 1015. The first gear 103, the second gear 105, the third gear 107, and the fourth gear 111 are all located between the front side plate 1012 and the first partition plate 1013. The flywheel 102 is located in front of the front side plate 1012. Several side plates and partitions are made of organic glass material with an elastic modulus of 3.2×10 3 N / mm 2 ~3.5×10 3 N / mm 2 All gears and racks are made of aluminum alloy with an elastic modulus of 6.8×10 4 N / mm 2 ~7.1×10 4 N / mm 2 The ratio of the outer diameter of the first gear 103 to the outer diameter of the second gear 105 is 1:1.1-1:2, the ratio of the outer diameter of the first gear 103 to the outer diameter of the flywheel 102 is 1:1-1:2, and the ratio of the outer diameter of the first gear 103 to the outer diameter of the seventh gear 115 is 1:1-1:1.5.

[0036] The left end of the spring 2 is fixedly connected to the left plate 1011. The right end is fixedly connected to the box 302. The spring 2 is an air spring. The stiffness of the spring 2 can be changed by changing the internal air pressure. Increasing the air pressure can increase the stiffness of the spring 2 and reduce the deflection. Reducing the air pressure can reduce the stiffness of the spring 2 and increase the deflection. The stiffness of the spring 2 can be adjusted according to demand by charging and discharging the air.

[0037] When the building structure vibrates under the action of earthquake or wind vibration, it will drive the laminated parallel single particle damper 3 to reciprocate along the guide rail 303 in one direction, and the spring 2 and the rack 109 connected to the laminated parallel single particle damper 3 will also reciprocate accordingly. During the reciprocating movement, the rack 109 will first drive the seventh gear 115 to rotate, the seventh gear 115 drives the fourth shaft 113 and the sixth gear 114 to rotate, the sixth gear 114 drives the fifth gear 112 to rotate, the fifth gear 112 drives the second shaft 106 and the third gear 107 to rotate, the third gear 107 drives the fourth gear 111 to rotate, the fourth gear 111 drives the first shaft 104 and the second gear 105 to rotate, the second gear 105 drives the first gear 103 to rotate, and the first gear 103 drives the third shaft 110 and the flywheel 102 to rotate. Thus, the translation speed of the rack 109 is converted into the rotation speed of the flywheel 102, generating inertial potential energy. The rack and pinion inertia device can store energy and transfer the energy to the laminated parallel single particle damper, making the reciprocating movement of the laminated parallel single particle damper more violent, driving the particles 301 inside the cavity to have more violent friction collisions, and increasing the collision energy consumption of the particles 301.

[0038] The particle 301 collides more violently under the acceleration amplification function at both ends of the rack and pinion inertial capacity device 1, and the impact force generated by the inner wall of the collision box 302 increases accordingly. The impact force will be transmitted to the left side plate 1011 in the rack and pinion inertial capacity device 1 through the spring 2 connected to the outer wall of the box 302. Since the rack and pinion inertial capacity device 1 is consolidated with the top of the structure, the impact force will be transmitted to the structure, forming a vibration reduction force on the structure, thereby greatly enhancing the vibration reduction control of the structure.

[0039] When the structure is subjected to vibration control, the composite vibration reduction device of inertia capacity and particle damping that can dissipate energy by stacking collision can be evenly arranged on each floor, or can be distributed according to the magnitude of the acceleration amplitude of each floor under the action of earthquake or wind load. For floors with large acceleration amplitude, the number and mass of particle dampers in the vibration reduction device should be set larger; for floors with small acceleration amplitude, the number and mass of particle dampers in the vibration reduction device should be set smaller. The ratio of the total mass of particle dampers to the total mass of the structure is 1%~5%.

[0040] Specific examples of use are Figure 6As shown: The office building is a reinforced concrete frame structure with 10 floors. The first floor is a 5m high hall, and the other floors are offices and material storage rooms. The floor height is 4m, the total height is 41m, and the total mass is 800t. Since the building is located in an earthquake-prone area and does not meet the seismic requirements, it is necessary to implement seismic vibration reduction measures. A stacked collision energy-dissipating inertial capacity-particle damping composite vibration reduction device is arranged on each floor of the building. Each device is equipped with three particle damper cavities, which are stacked and arranged in parallel. The distance between the outer walls on both sides of the cavity can be flexibly adjusted so that the particles in the cavity maintain the optimal movement distance. A steel ball is placed in each cavity, and the radius of the steel ball in the cavity is set on the first floor. r 1=0.35m, the optimal spacing for the steel balls to move in the cavity d 1=0.25m, so the length of the particle damper cavity arranged on the first floor is L 1= d 1+2 r 1=0.95m, the total mass ratio of the three steel balls on the first layer is 0.5%. The radius of the steel balls on the second layer is set r 2=0.33m, the optimal spacing for the steel balls to move in the cavity d 2=0.25m, cavity length L 2= d 2+2 r 2 = 0.91m, the total mass ratio of the steel ball is 0.45%. The third layer sets the radius of the steel ball r 3=0.32m, the optimal spacing for the steel balls to move in the cavity d 3=0.25m, cavity length L 3= d 3+2 r 3=0.89m, the total mass ratio of the steel ball is 0.4%. The fourth layer sets the radius of the steel ball r 4=0.31m, the optimal spacing for the steel balls to move in the cavity d 4=0.25m, cavity length L 4= d 4+2 r 4=0.87m, the total mass ratio of the steel ball is 0.35%. The fifth layer sets the radius of the steel ball r 5=0.29m, the optimal spacing for the steel balls to move in the cavity d 5=0.25m, cavity length L 5= d 5+2 r 5=0.83m, the total mass ratio of the steel ball is 0.3%. The sixth layer sets the radius of the steel ball r 6=0.27m, the optimal spacing for the steel balls to move in the cavity d 6=0.25m, cavity length L 6= d 6+2 r6=0.79m, the total mass ratio of the steel ball is 0.25%. The seventh layer sets the radius of the steel ball r 7=0.25m, the optimal spacing for the steel balls to move in the cavity d 7=0.25m, cavity length L 7= d 7+2 r 7=0.75m, the total mass ratio of the steel ball is 0.2%. The eighth layer sets the radius of the steel ball r 8=0.23m, the optimal spacing for the steel balls to move in the cavity d 8=0.25m, cavity length L 8= d 8+2 r 8=0.71m, the total mass ratio of the steel ball is 0.15%. The ninth layer sets the radius of the steel ball r 9=0.2m, the optimal spacing for the steel balls to move in the cavity d 9=0.25m, cavity length L 9= d 9+2 r 9=0.65m, the total mass ratio of the steel ball is 0.1%. The top layer sets the steel ball radius r 10 =0.16m, the optimal spacing of the steel balls in the cavity d 10 =0.25m, cavity length L 10 = d 10 +2 r 10 =0.57m, the total mass ratio of steel balls is 0.05%. The total mass ratio of steel balls arranged on ten floors is 2.75%.

[0041] The rack and pinion inertia device is provided with a seventh gear 115 with a radius of 0.1m, three large gears including the second gear 105, the third gear 107 and the sixth gear 114 with a radius of 0.2m, three small gears including the first gear 103, the fourth gear 111 and the fifth gear 112 with a radius of 0.1m, a flywheel 102 with a radius of 0.1m and a rack 109. The rack 109 is meshed with the seventh gear 115. After the rack 109 moves horizontally, it will drive the seventh gear 115 to rotate. The seventh gear 115 drives the sixth gear 114 to rotate through the fourth shaft 113. The sixth gear 114 is meshed with the fifth gear 112. The fifth gear 112 rotates with the rotation of the sixth gear 114, and drives the third gear 107 to rotate through the second shaft 106. The fourth gear 111 meshed with the third gear 107 rotates accordingly. At the same time, the second gear 105 coaxial with the fourth gear 111 also rotates, and drives the first gear 103 meshed with it to rotate. Finally, the first gear 103 drives the coaxial flywheel 102 to rotate through the third shaft 110, generating an inertia coefficient (apparent mass). The inertia ratio of this inertia device is 1%.

[0042] One end of the rack is fixed to the outer wall of the laminated parallel single particle damper cavity. The spring is a pneumatic spring, which can be adjusted to any stiffness by inflation and deflation according to the needs. It is fixed to the vertical baffle of the gear rack inertia device and the outer wall of the laminated parallel single particle damper cavity to adjust the stiffness to 2×10 6 N / m, providing stiffness and transmitting force for the system. Two guide rails 303 are arranged at the bottom of the laminated parallel single particle damper, and the length of the guide rails 303 is 0.5m. When the structure vibrates under the action of an earthquake, the upper laminated parallel single particle damper will slide back and forth along the vibration direction, thereby driving the rack 109 and the spring 2 to move back and forth, and the inertia device will play its apparent mass enhancement role, so that the total equivalent mass ratio of the laminated parallel single particle damper is significantly improved, that is, the total equivalent mass ratio of the laminated collision energy dissipation inertia-particle damping composite vibration reduction device is 12.75%.

[0043] When an earthquake strikes, the steel balls in the stacked collision energy-absorbing inertial capacity-particle damping composite vibration reduction devices arranged on each layer of the structure will immediately collide violently. The energy absorption capacity is increased by 5 times compared with the particle damper not combined with the inertial capacity device, and the total equivalent mass ratio is increased by 4.6 times. The shock absorption effect is significant. The horizontal displacement vibration reduction rate of the top layer of the structure reaches 75%, which is 35% higher than the vibration reduction rate of the particle damper not combined with the inertial capacity device.

[0044] Under the same conditions, the traditional parallel one-way single particle damper occupies an area of ​​1.5m on the first floor. 2 The composite vibration reduction device with inertia capacity and particle damping for stacked collision energy dissipation occupies an area of ​​0.75m on the first floor.2 , the floor space is reduced by half. According to the measurement, when there is an earthquake or strong wind, the laminated collision energy dissipation inertia capacity-particle damping composite vibration reduction device can effectively play the role of energy dissipation and vibration reduction, and the vibration acceleration index can meet the international residential comfort standard, with significant vibration reduction effect. Under the same vibration reduction rate, the laminated collision energy dissipation inertia capacity-particle damping composite vibration reduction device is 70% less than the traditional parallel unidirectional single particle damper; under the same steel ball mass, the laminated collision energy dissipation inertia capacity-particle damping composite vibration reduction device is 35% higher than the traditional parallel unidirectional single particle damper, achieving a good lightweight vibration control effect.

[0045] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A composite vibration reduction device of inertia capacity and particle damping capable of absorbing energy by stacking collision, characterized in that: It comprises a laminated parallel single particle damper (3), a rack and pinion inertia device (1), and a spring (2); The stacked parallel single particle damper (3) comprises a box (302), particles (301), and a guide rail (303); the box (302) is divided into a plurality of cavities from top to bottom; a particle (301) is placed in each cavity, and the particle (301) can only move back and forth in one direction; the guide rail (303) is arranged below the box (302) and fixedly connected to the building structure; and the bottom of the box (302) is slidably connected to the guide rail (303); The rack and pinion inertia device (1) comprises a support (101), a seventh gear (115), a rack (109), a fourth shaft (113), a sixth gear (114), a fifth gear (112), a second shaft (106), a third gear (107), a fourth gear (111), a second gear (105), a first shaft (104), a first gear (103), a third shaft (110), and a flywheel (102); the support (101) is fixedly connected to a building structure; the rack (109) is 09) is arranged at the bottom of the support (101) and is fixedly connected to the box body (302), the support (101) is slidably connected to the rack (109), the seventh gear (115) is meshingly connected to the rack (109), the seventh gear (115) is rotatably connected to the support (101) through the fourth shaft (113), and a sixth gear (114) is also arranged behind the seventh gear (115), and the sixth gear (114) is rotatably connected to the support (101) through the fourth shaft (113). The upper part of the wheel (114) is meshed and connected to a fifth gear (112), and the fifth gear (112) is rotatably connected to a support (101) via a second shaft (106). A third gear (107) is provided in front of the fifth gear (112), and the third gear (107) is rotatably connected to the support (101) via the second shaft (106). The lower part of the third gear (107) is meshed and connected to a fourth gear (111), and the fourth gear (111) is rotatably connected to the support (101) via the first shaft (104). ), a second gear (105) is provided in front of the fourth gear (111), the second gear (105) is rotatably connected to the support (101) via the first shaft (104), the left side of the second gear (105) is meshingly connected to the first gear (103), the first gear (103) is rotatably connected to the support (101) via the third shaft (110), a flywheel (102) is provided in front of the first gear (103), and the flywheel (102) is rotatably connected to the support (101) via the third shaft (110); The left end of the spring (2) is fixedly connected to the support (101), and the right end is fixedly connected to the box (302); The rack (109) is an inverted T-shaped structure, and the meshing teeth are arranged at the top of the middle of the inverted T-shaped structure. Two pressure plates (108) are symmetrically arranged at the bottom of the support (101). The two pressure plates (108) are respectively pressed on the two horizontal sides of the rack (109), and the rack (109) slides along the slide groove formed by the two pressure plates (108); the ratio of the outer diameter of the first gear (103) to the outer diameter of the second gear (105) is 1:1.1~1:2, and the outer diameter of the first gear (103) is 1:1.1~1:

2. The outer diameter ratio of the first gear (103) to the seventh gear (115) is 1:1 to 1:2, the outer diameter ratio of the first gear (103) to the outer diameter of the seventh gear (115) is 1:1 to 1:1.5, and the spring (2) is an air spring; the length-to-width ratio of the plurality of cavities inside the housing (302) is 1:0.2 to 1:0.6, the width-to-height ratio is 1:1, the total height of the housing (302) to the length of the cavity is 1:0.2 to 1:1.5, a lubricant is applied to the cavity, and the elastic modulus of the particle (301) is 2.0×105 N / mm 2 ~2.8×105N / mm 2 , the ratio of the total mass of the stacked parallel single particle damper (3) to the total mass of the controlled structure is 1%~5%.

2. The laminated collision energy dissipation inertia-particle damping composite vibration reduction device according to claim 1, characterized in that: The pressure plate (108) comprises a horizontal portion and a vertical portion, the horizontal portion is arranged perpendicular to the vertical portion, the horizontal portion is fixedly connected to the top end of the vertical portion, the horizontal portion presses on the horizontal side edge of the rack (109), and the vertical portion presses on the side surface of the horizontal side edge of the rack (109).

3. The laminated collision energy dissipation inertia-particle damping composite vibration reduction device according to claim 1, characterized in that: The support (101) is provided with a left side plate (1011), a front side plate (1012), a first partition plate (1013), a second partition plate (1014), and a rear side plate (1015); the front side plate (1012), the first partition plate (1013), the second partition plate (1014), and the rear side plate (1015) are parallel to each other and vertically fixedly connected to the rear side plate (1015); the rack (109) and the seventh gear (115) are both located on the first partition plate (1013) and the second partition plate (1014), the fifth gear (112) and the sixth gear (114) are both located between the second baffle plate (1014) and the rear side plate (1015), the first gear (103), the second gear (105), the third gear (107) and the fourth gear (111) are all located between the front side plate (1012) and the first baffle plate (1013), and the flywheel (102) is located in front of the front side plate (1012); and the left end of the spring (2) is fixedly connected to the left side plate (1011).

Images