CN115288018A - Inertial mass viscous damper with response amplification mechanism suitable for tunnel anchor - Google Patents
Inertial mass viscous damper with response amplification mechanism suitable for tunnel anchor Download PDFInfo
- Publication number
- CN115288018A CN115288018A CN202210893166.5A CN202210893166A CN115288018A CN 115288018 A CN115288018 A CN 115288018A CN 202210893166 A CN202210893166 A CN 202210893166A CN 115288018 A CN115288018 A CN 115288018A
- Authority
- CN
- China
- Prior art keywords
- ball screw
- inertial mass
- metal
- nut
- piston
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/14—Towers; Anchors ; Connection of cables to bridge parts; Saddle supports
Abstract
The invention provides an inertial mass viscous damper with a response amplification mechanism and suitable for a tunnel anchor, which comprises a metal outer frame, a connecting rod, a ball screw, a nut, a thrust ball bearing, a gear, an inertial mass element, a support frame, a piston with a hole and viscous damping liquid, wherein the connecting rod is connected with the ball screw; the vibration of the inhaul cable is transmitted to the ball screw through the connecting rod, the ball screw makes linear motion, and the inertial mass element generates rotary motion to generate inertial force; meanwhile, the driving gear drives the driven gear to rotate, the driven gear drives the other ball screw to do linear motion, so that the piston is driven to do linear motion in the viscous liquid, damping force is generated through shearing, and an energy consumption effect is achieved. According to the damper, the radiuses of the meshed gears are different, and the displacement speed response is amplified through the motion conversion function of the ball screw, so that the energy consumption effect of the damper is enhanced; meanwhile, the inertia force is generated by means of high-speed rotation of the inertia mass element, the negative rigidity effect is generated, the vibration frequency is reduced, and the vibration reduction effect is achieved.
Description
Technical Field
The invention belongs to the technical field of dampers, and particularly relates to an inertial mass viscous damper with a response amplification mechanism, which is suitable for a tunnel type anchorage front anchor chamber inhaul cable.
Background
In recent years, an inertially-viscous damper is widely applied to the field of vibration damping control of bridge structures or high-rise building structures, with the utilization of mechanical amplification mechanisms such as ball screws, lever pendulums, hydraulic mechanisms and the like, an inertially-viscous element can obtain great inertial mass by virtue of smaller mass per se, and correspondingly obtained inertial force can enable a structural system to show a negative stiffness effect. In addition, in the face of some effects with small displacement speed and short period, such as vibration at a guy cable of an anchor chamber before a tunnel type anchorage, a mechanism connected with an inertial mass element often has the characteristic of 'delaying' to play a role, and because the speed displacement response of the mechanism is too small, the initial response of a spring member or a viscous damper member which plays a role in cooperation with the mechanism is also too small, and the vibration reduction and energy consumption effects are difficult to play immediately. Therefore, it is highly desirable to develop a damper that can respond fast to vibration and has a response amplification mechanism in the face of a small-amplitude response.
Disclosure of Invention
The invention provides an inertial mass viscous damper with a response amplification mechanism, which is suitable for a tunnel anchor. The purpose is as follows: the vibration influence under the action of the tunnel type anchorage dynamic load is reduced, the reaction speed of the inertia mass viscous damper for responding to the vibration is increased, and the small-amplitude displacement speed response is amplified, so that the better energy consumption and vibration reduction effects are exerted.
In order to achieve the purpose, the invention provides an inertia mass viscous damper with a response amplification mechanism, which is suitable for a tunnel anchor. The damper comprises a metal outer frame, a support frame, a connecting piece, a guide rod and a metal support, wherein the metal outer frame is used for protecting the internal mechanism and providing a sport place for the internal mechanism; the support frame is fixedly connected with the metal outer frame and used as a support part of the whole damper and divides the damper into various parts; the guide rod is fixedly connected to the top or the bottom of the support frame and the metal outer frame; the connecting piece is fixedly connected with the ball screw and connected with an external inhaul cable to transmit inhaul cable vibration; the metal bearing is fixedly connected with the ball screw, a circular hole is reserved at the joint of the metal bearing and the guide rod, and a certain gap is reserved between the metal bearing and the top and the bottom of the metal outer frame; the damper also comprises a ball screw, a nut, an anti-thrust ball bearing and a gear, wherein the ball screw is divided into a left side and a right side respectively, the left side ball screw is a driving end, the upper part of the left side ball screw is fixedly connected with the connecting piece, the lower part of the left side ball screw is fixedly connected with the metal bearing, the right side ball screw is a driven end, the upper part of the right side ball screw is fixedly connected with the metal bearing, and the lower part of the right side ball screw is fixedly connected with the piston with a hole; the nut is coaxial with the ball screw and sleeved on the ball screw; the thrust ball bearing is placed between the support frame and the nut and is fixedly connected with the support frame; the gear is divided into a left side and a right side, the left side gear is a driving end and is coaxial with the nut and the ball screw and sleeved on the nut, the right side gear is a driven end and is coaxial with the nut and the ball screw and sleeved on the nut, and the two gears are meshed and connected; the damper also comprises an inertia element, a spring, a piston with a hole and viscous damping liquid, wherein the inertia element, the nut and the ball screw are coaxial and are sleeved on the nut; the spring is fixedly connected with the metal outer frame and the metal bearing and sleeved on the guide rod; the piston with the hole and the viscous damping liquid are both arranged in the viscous damping cavity.
Optionally, the metal outer frame is a rectangular frame, and the metal outer frame is fixedly connected with the support frame;
optionally, the gear radii are different, and the left driving gear radius is larger than the right driven gear radius.
In the invention, in order to realize a mechanism of responding and amplifying speed displacement, the radius of the left driving gear is larger than that of the right driven gear.
Optionally, the inertial mass element is disc-shaped, and the radius of the inertial mass element is consistent with that of the left driving gear.
Optionally, the metal support is a cylindrical tray of a thickness, the radius of which is slightly smaller than the inerter.
Optionally, the piston with the hole is disc-shaped, and circular holes with a radius of 6mm are respectively arranged on circles 3cm, 6cm and 9cm away from the center of the circle.
In the invention, the required parameters can be obtained through tests in the parameter selection of the viscous damping liquid, and the energy consumption effect of the damper is adjusted by changing the parameters.
In the invention, when the external vibration happens, the ball screw is enabled to generate large-amplitude displacement, and in order to ensure the normal operation of the damper, enough reserved space is reserved between the metal bearing and the upper or lower metal outer frame.
In the invention, enough reserved space exists between the gear, the inertia mass element and the piston with the hole and the metal outer frame.
Optionally, the outer frame above or below the metal bearing is arranged in an outward convex structure form or the spring is fixedly connected with the support frame, and a hole is reserved in the outer frame above or below the metal bearing, so that the normal operation of the damper is ensured.
Optionally, to reduce friction when the inertance element rotates at high speed, the thrust ball bearing is arranged between the nut and the support frame.
Optionally, the external structure connected by the connecting piece is a cable structure, and the integral damper is arranged on the side wall of the front anchor chamber of the tunnel type anchorage.
The invention provides an inertia mass viscous damper with a response amplification mechanism, which is suitable for a tunnel anchor and can be applied to damping at a cable scattering position of a tunnel type anchor front anchor chamber, when the vibration of the cable is transmitted to a ball screw through a connecting rod, the ball screw is driven to perform linear motion, and a ball screw transmission mechanism converts the linear motion of the ball screw into the rotary motion of an inertia mass element to generate inertia force; simultaneously, the driving gear starts to perform rotary motion, the rotary motion is transmitted to the driven gear through meshing connection, the driven gear drives the other ball screw to perform linear motion, so that the piston is driven to perform linear motion in the viscous liquid, damping force is generated through shearing action, and the energy consumption effect is achieved. According to the damper, the linear speeds of the meshed gears are the same, the displacement speed response is amplified through the radius change and the motion conversion function of the ball screw, so that the energy consumption effect of the damper is enhanced, meanwhile, the inertia force is generated by means of high-speed rotation of the inertia element, the negative rigidity effect is generated, the vibration frequency is reduced, the external vibration period is increased, and the vibration damping effect is achieved.
In general, the beneficial effects of the invention include:
1. the ball screw type inerter is adopted, and the inerter element can generate an inertia effect far larger than the physical mass of the inerter element by adopting smaller physical mass, so that the actual mass and volume of the damper can be obviously reduced.
2. The linear speed of the meshing gear is the same, the displacement speed response is amplified by changing the radius of the meshing gear and the motion conversion function of the ball screw, and therefore the energy consumption effect of the damper is enhanced.
3. The vibration frequency of the structure is reduced by means of the negative stiffness effect embodied by the inertially-loaded element. Through the conversion and transmission effects of the ball screw and the gear, the spring and the piston with the hole perform linear motion, meanwhile, due to the speed amplification effect of the ball screw, the inertia mass disc starts to rotate at a high speed to generate inertia force, and at the moment, the displacement direction of the integral structure is consistent with the direction of the force, so that the positive stiffness effect is shown; along with the vibration of the inhaul cable, the ball screw is subjected to a force opposite to that before, but due to the inertia effect generated by the high-speed rotation of the inertia mass disc, the screw moves in the direction opposite to that of the force at the first time, at the moment, the spring and the piston with the hole also keep the previous moving state, the integral displacement direction of the structure is opposite to the direction of the force, and the negative stiffness effect is shown; due to the existence of friction and reverse force, the inertial mass disc stops moving after a period of time and starts to move in the reverse direction, and meanwhile, the displacement of the integral structure is consistent with the direction of the force again, and the inertial mass disc shows positive rigidity again. With the continuous vibration of the external structure, the rigidity of the vibration damping device alternately exhibits between positive rigidity and negative rigidity.
4. The integral structure framework adopts a fixed connection mode, is put into use after the mechanism parameters are set, has good durability, and is suitable for the structure vibration reduction treatment at the position difficult to overhaul and maintain.
Drawings
The following further description is made with reference to the accompanying drawings and detailed description:
FIG. 1 is a layout diagram of an inertial mass viscous damper with a response amplification mechanism suitable for a tunnel anchor according to the present invention.
FIG. 2 is a cross-sectional view of an inertially-viscous damper with a response amplification mechanism suitable for use in a tunnel anchor in accordance with the present invention.
Fig. 3 isbase:Sub>A sectional viewbase:Sub>A-base:Sub>A of fig. 2.
Fig. 4 is a sectional view taken along the plane B-B of fig. 2.
Fig. 5 is a cross-sectional view of the plane C-C of fig. 2.
In the figure: 1-a metal outer frame, 2-a connecting piece, 3-a ball screw, 4-a nut, 5-a thrust ball bearing, 6-a gear, 7-an inertia element, 8-a guide rod, 9-a spring, 10-a support frame, 11-a piston with holes, 12-a metal support, 13-viscous damping liquid, 14-an anchor plug body front anchor surface, 15-a front anchor chamber loose cable, 16-a front anchor chamber surrounding rock side wall and 17-a damper fixing device.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clear, the present invention is further described below with reference to the following embodiments and accompanying drawings. It should be understood that the description of the specific embodiments is intended to be illustrative of the invention and is not intended to limit the invention. In addition, the technical features according to the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Referring to fig. 1-5, the invention provides an inertial mass viscous damper with a response amplification mechanism, which is suitable for a tunnel type anchorage and comprises a metal outer frame 1, a connecting piece 2, a ball screw 3, a nut 4, a thrust ball bearing 5, a gear 6, an inertial mass element 7, a guide rod 8, a spring 9, a support frame 10, a piston 11 with holes, a metal support 12 and viscous damping liquid 13.
The inertia mass viscous damper suitable for the tunnel type anchorage and provided with the response amplification mechanism is divided into a mass inertia device part, a viscous damper part and a transmission conversion mechanism by the support frame 10, wherein the mass inertia device part comprises: a thrust ball bearing 5 and an inertial mass element 7; the viscous damper portion includes: a piston 11 with a hole, a viscous damping liquid 13; the transmission conversion mechanism comprises: ball 3, nut 4, gear 6.
The connecting piece 2 is fixedly connected with the ball screw 3; the nut 4 is coaxial and concentric with the ball screw 3 and sleeved on the ball screw 3; the gear 6 is sleeved on the nut 4 and has a certain movement space with the metal outer frame 1; the size of the gear 6 is selected according to the test result, and when the radius of the gear of the right viscous damper part is smaller than that of the gear of the left viscous damper part, the displacement speed amplification effect can be achieved.
The inertia element 7 is sleeved on the nut 4 coaxially below the inertia element and has a certain movement space with the metal outer frame 1; the thrust ball bearing 5 is vertically arranged between the support frame 10 and the nut 4 and fixedly connected with the support frame 10, and the other end of the thrust ball bearing is lapped on the nut 4; a thrust ball bearing 5 for restricting the linear movement of the nut while not restricting the rotational movement of the nut; two ends of the guide rod 8 are respectively and fixedly connected to the support frame 10 and the metal outer frame 1; the metal support 12 is fixedly connected to the ball screw 3, sleeved on the guide rod 8 and has a certain movement space with the metal outer frame 1; two ends of the spring 9 are respectively and fixedly connected to the metal support 12 and the metal outer frame 1; the piston 11 with the hole is fixedly connected to the ball screw 3, a circle of rubber layer is sleeved on the periphery of the piston, and a certain movement space is reserved between the piston and the metal outer frame 1.
The guide rods 8 are not collinear, and at least 4 guide rods are arranged; the holes arranged on the piston with holes 11 are not collinear and are at least 9.
The working principle of the damper is as follows:
the inertial mass viscous damper (damper for short) suitable for the tunnel type anchorage and provided with the response amplification mechanism is connected with an external structure through a connecting piece 2, when the vibration of the external structure reaches a certain amplitude, the vibration response is transmitted to a ball screw 3 through the connecting piece 2 to drive the ball screw to do linear motion, by virtue of the motion conversion function of the ball screw mechanism, a gear 6 sleeved on a nut 4 starts to do rotary motion, meanwhile, the nut 4 drives an inertial mass element 7 to do high-speed rotary motion, an inertial mass disc which does high-speed motion can generate great inertial mass, the actual physical mass of the damper can be further reduced, and meanwhile, the negative rigidity effect reflected by the generated inertial force reduces the structural vibration frequency and increases the vibration period; the gear 6 drives the driven gear to rotate after rotating, the rotating is converted into linear motion of the ball screw 3 again by the aid of the function of motion conversion of the ball screw mechanism, the linear motion response of the ball screw 3 is amplified after the angular velocity amplification effect of the gears with different radii is achieved, and meanwhile the ball screw 3 drives the perforated piston 11 to shear the viscous damping liquid to generate damping force and generate an energy consumption effect.
In the description of the present application, it is to be understood that the terms "outer", "left", "right", "upper", "lower", "above", "below", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, merely for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore, are not to be construed as limiting the present application.
The above-described embodiments should not be construed as limiting the scope of the invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions can occur, depending on design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An inerter viscous damper suitable for a tunnel anchor and having a response amplification mechanism is characterized in that: the device comprises a metal outer frame (1), a connecting piece (2), a ball screw (3), a nut (4), an anti-thrust ball bearing (5), a gear (6), an inertial mass element (7), a support frame (10), a piston (11) with holes and viscous damping liquid (13), wherein the ball screw (3), the nut (4), the anti-thrust ball bearing (5), the gear (6), the inertial mass element (7), the piston (11) with holes and the viscous damping liquid (13) are positioned inside the metal outer frame (1), and the support frame (10) is fixedly connected inside the metal outer frame (1) and used for supporting all parts in the metal outer frame (1) and leaving motion spaces between all parts; the ball screw (3) is divided into a left side and a right side, the upper part of the ball screw (3) on the left side is connected with a guy cable (15) outside the metal outer frame (1) to transmit the vibration of the guy cable (15); two nuts (4) are sleeved on the ball screw (3) on the left side, and a driving gear (6) is sleeved on the nut (4) on the upper side; the inertia element (7) is sleeved on the lower nut (4); the right ball screw (3) is a driven end, and the lower part of the right ball screw is fixedly connected with a piston (11) with a hole; a nut (4) is sleeved on the right ball screw (3), and a driven gear (6) meshed with the driving gear (6) is sleeved on the nut (4); the perforated piston (11) and the viscous damping liquid are both arranged in the viscous damping chamber; the thrust ball bearing (5) is vertically arranged between the support frame (10) and the nut (4) and fixedly connected with the support frame (10), and the other end of the thrust ball bearing is lapped on the nut (4).
2. The inerter viscous damper with the response amplification mechanism suitable for the tunnel anchor is characterized by further comprising a metal support (12) and a guide rod (8), wherein the metal support (12) is fixedly connected to the lower portion of the left-side ball screw (3) and the upper portion of the right-side ball screw (3), the guide rod (8) is parallel to the ball screw (3), and one end of the guide rod is fixedly connected to the support frame (10) or the metal outer frame (1); the metal support (12) is sleeved on the guide rod (8).
3. Inertial mass viscous damper for a tunnel anchor with a responsive amplification mechanism according to claim 1 or 2, characterized in that the metal casing (1) is a cuboid frame.
4. An inertance viscous damper adapted for a tunnel anchor having a responsive amplifying mechanism according to claim 1 or claim 2, wherein the radius of the driving gear (6) is greater than the radius of the driven gear (6).
5. Inertial mass viscous damper suitable for use in a tunnel anchor with a responsive amplification mechanism according to claim 1 or 2, characterized by the fact that the inertial mass element (7) is disc-shaped, in the form of a metal flywheel, fitted over a coaxial concentric nut (4) with the same radius as the coaxial gear (6) on the ball screw (3).
6. The viscous damper of inertia mass suitable for tunnel anchorage with response amplification mechanism according to claim 2, characterized in that the metal support (12) is rectangular or circular in shape, and a circular hole is provided at the junction with the guide rod (8) to ensure that no sliding friction occurs when the metal support (12) moves linearly on the guide rod (8); the radius of the metal support (12) is slightly smaller than that of the inertia element (7).
7. The inertial mass viscous damper suitable for a tunnel anchor with a response amplification mechanism according to claim 1 or 2, characterized in that the piston (11) with holes is rectangular or circular, the piston (11) with holes is provided with small holes, and the periphery of the piston is surrounded by a rubber ring; and a sealing sleeve is arranged at the joint of the ball screw (3) and the viscous damping liquid chamber.
8. The inertial mass viscous damper suitable for a tunnel anchor with a response amplification mechanism is characterized by further comprising a spring (9), wherein one end of the spring (9) is fixedly connected to the metal support (12), and the other end of the spring (9) is fixedly connected to the metal outer frame (1) or the support frame (10); the spring (9) is wound on the guide rod (8).
9. The inertial mass viscous damper suitable for tunnel anchorage with response amplification mechanism according to claim 8, characterized in that the metal frame (1) above or below the metal support (12) is arranged in an outward convex structure or the spring (9) is fixedly connected with the support frame (10), and the metal frame (1) above or below the metal support (12) is provided with a hole to ensure the normal operation of the damper.
10. Inertial mass viscous damper suitable for tunnel anchors with response amplification mechanism according to any of claims 1-9, characterized by that there are gaps between the nut (4), gear (6), inertial mass element (7), piston with hole (11) and metal frame (1) or support frame (10) to ensure that the above mechanisms do not generate sliding friction in rotation or linear motion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210893166.5A CN115288018A (en) | 2022-07-27 | 2022-07-27 | Inertial mass viscous damper with response amplification mechanism suitable for tunnel anchor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210893166.5A CN115288018A (en) | 2022-07-27 | 2022-07-27 | Inertial mass viscous damper with response amplification mechanism suitable for tunnel anchor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115288018A true CN115288018A (en) | 2022-11-04 |
Family
ID=83823851
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210893166.5A Pending CN115288018A (en) | 2022-07-27 | 2022-07-27 | Inertial mass viscous damper with response amplification mechanism suitable for tunnel anchor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115288018A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117403532A (en) * | 2023-12-14 | 2024-01-16 | 山东大学 | Self-adaptive damping limiting device and bridge |
-
2022
- 2022-07-27 CN CN202210893166.5A patent/CN115288018A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117403532A (en) * | 2023-12-14 | 2024-01-16 | 山东大学 | Self-adaptive damping limiting device and bridge |
| CN117403532B (en) * | 2023-12-14 | 2024-03-12 | 山东大学 | Self-adaptive damping limiting device and bridge |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN115288018A (en) | Inertial mass viscous damper with response amplification mechanism suitable for tunnel anchor | |
| WO2020155642A1 (en) | Active composite variable-damping rotation control apparatus | |
| CN110284742B (en) | Friction energy consumption type particle damper | |
| CN110499835B (en) | Shear thickening fluid torsion damper under low-speed impact and application method thereof | |
| CN111156283A (en) | Crank piston type inertial volume damping dynamic vibration isolator | |
| CN109403487B (en) | Semi-active flexible particle collision inertia damper | |
| CN211312916U (en) | Shear thickening fluid torsional damper with speed amplification effect | |
| KR102199650B1 (en) | Active control system for rolling behaviors of high-speed trains | |
| CN213808580U (en) | Rotary viscous damper | |
| JP3843174B2 (en) | Seismic isolation structure | |
| US4161237A (en) | Vibration absorber for rotating body | |
| JP5142929B2 (en) | Viscous mass damper with spring and viscous mass damper | |
| JPS629045A (en) | Vibration damping device | |
| CN201606444U (en) | Damper with friction-adhesion comprehensive effect | |
| JP2022094305A (en) | Bidirectional inertia speed type damper | |
| JPS62151638A (en) | Rotary vibration damping device utilizing shear resistance | |
| CN111692247A (en) | Rotary viscous damper | |
| CN209511004U (en) | Actively compound variable damping control device for pivoting | |
| JPWO2008041545A1 (en) | Attenuator | |
| CN111306241A (en) | Self-adaptive friction energy dissipation and vibration reduction device for bridge structure | |
| CN208112406U (en) | Servo motor vibration-proof structure | |
| JPS6111551Y2 (en) | ||
| CN219221143U (en) | Tuned mass damper shock insulation device for cultural relics and equipment | |
| CN112982704B (en) | Series-parallel tuned inerter damper | |
| JPWO2006112159A1 (en) | Attenuator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |