CN116498681A - Variable-rigidity vibration reduction mechanical device capable of transmitting energy in one direction and design method - Google Patents
Variable-rigidity vibration reduction mechanical device capable of transmitting energy in one direction and design method Download PDFInfo
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- CN116498681A CN116498681A CN202310314375.4A CN202310314375A CN116498681A CN 116498681 A CN116498681 A CN 116498681A CN 202310314375 A CN202310314375 A CN 202310314375A CN 116498681 A CN116498681 A CN 116498681A
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- 230000009467 reduction Effects 0.000 title claims description 9
- 230000007246 mechanism Effects 0.000 claims abstract description 73
- 238000013016 damping Methods 0.000 claims abstract description 65
- 230000005540 biological transmission Effects 0.000 claims abstract description 46
- 239000004020 conductor Substances 0.000 claims description 13
- 230000001360 synchronised effect Effects 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 description 10
- 238000005381 potential energy Methods 0.000 description 5
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- 238000004146 energy storage Methods 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F7/00—Vibration-dampers; Shock-absorbers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
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Abstract
The invention relates to a variable stiffness vibration damping mechanical device capable of unidirectionally transmitting energy and a design method thereof. According to the invention, the first ratchet mechanism is used for carrying out unidirectional intervention on the vibration of the controlled structure, so that the elastic element absorbs the vibration energy of the controlled structure during intervention, and the deformation is recovered to release the energy during non-intervention, and the energy released by the elastic element can only be dissipated by the damping element and cannot be transmitted back to the controlled structure through the unidirectional transmission characteristics of the transmission mechanism and the first ratchet mechanism, thereby realizing unidirectional transmission of the vibration energy of the controlled structure and maximizing consumption of the vibration energy of the controlled structure.
Description
Technical Field
The invention relates to the technical field of vibration reduction and energy consumption of structures, in particular to a variable stiffness vibration reduction mechanical device capable of unidirectionally transmitting energy and a design method.
Background
The structure is easy to vibrate under the action of dynamic load, the structure vibration control is an important technology for ensuring the safety of the structure, and the structure is ensured by adding some energy consumption devices on the structure, so that the dynamic reaction of the structure under the action of external load is reduced; TMD (Tuned mass damper ) is widely used in practical engineering due to its low cost, convenient installation, and good vibration damping performance.
The TMD consists of a mass block, a spring unit and a damping unit, when the structure vibrates, most vibration energy of the controlled structure is transferred to the TMD mass block through the spring unit, and energy consumption is realized through the damping unit additionally arranged between the TMD mass and the controlled structure.
However, because the energy consumption efficiency is limited, the residual kinetic energy on the TMD mass block is transmitted back to the controlled structure through the spring unit, so that the vibration energy consumption of the controlled structure is insufficient and the controlled structure is still under the condition of larger vibration; therefore, there is a need to develop a device that maximizes the consumption of vibration energy of a controlled structure.
Disclosure of Invention
The invention aims at: aiming at the problems that the residual kinetic energy on the traditional TMD mass block in the prior art is transmitted back to a controlled structure through a spring unit, the vibration energy consumption of the controlled structure is insufficient and the vibration condition is still in a larger vibration condition, the variable stiffness vibration damping mechanical device with unidirectional energy transmission and the design method are provided.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
in a first aspect, the invention provides a variable stiffness vibration damping mechanical device capable of unidirectional energy transfer, which comprises a first ratchet mechanism, a transmission mechanism, an elastic element and a damping element, wherein the first ratchet mechanism is used for being connected between a controlled structure and the transmission mechanism, the first ratchet mechanism is connected with the elastic element, the transmission mechanism is connected with the damping element, the first ratchet mechanism can be rotated by the movement of the controlled structure, so that the elastic element can store energy, and the damping element can work through the transmission mechanism when the elastic element is discharged.
By adopting the variable stiffness vibration reduction mechanical device for unidirectional energy transmission, the unidirectional intervention of the first ratchet mechanism is carried out to vibrate the controlled structure, so that the elastic element can absorb vibration energy of the controlled structure during intervention and recover deformation to release energy when the elastic element does not intervene.
As a preferable technical scheme of the invention, the first ratchet mechanism comprises a ratchet bar and a first rotating wheel, a plurality of first pawls which can be matched with the ratchet bar are arranged on the first rotating wheel, the first rotating wheel is connected with the elastic element, the ratchet bar is used for being connected with a controlled structure, the first rotating wheel is connected with the transmission mechanism, the ratchet bar can drive the first rotating wheel to rotate, and the first rotating wheel drives the elastic element to store energy.
As a further preferable embodiment of the present invention, the elastic element is a torsion spring.
As a further preferable technical scheme of the invention, the transmission mechanism is a second ratchet mechanism, a gear mechanism, a friction wheel mechanism or a synchronous pulley mechanism.
As a further preferable technical scheme of the invention, the second ratchet mechanism comprises a ratchet wheel and a second rotating wheel, the first rotating wheel and the ratchet wheel are coaxially arranged, a plurality of second pawls which can be matched with the ratchet wheel are arranged on the second rotating wheel, the second rotating wheel is connected with the damping element, and the elastic element can drive the ratchet wheel to rotate to drive the second rotating wheel to rotate when the elastic element is used for discharging energy.
As a further preferable embodiment of the present invention, the damping element is a rotary damper.
As a further preferable technical scheme of the invention, the rotary damper is a liquid damper, a gas damper or an electromagnetic damper.
As a further preferable technical scheme of the invention, the electromagnetic damper comprises a conductor plate and a permanent magnet, the second rotating wheel comprises a rotating shaft and a shell in rotating fit with the rotating shaft, the second pawl is connected outside the shell, the conductor plate is connected in the shell, and the permanent magnet is connected with the rotating shaft.
As a further preferable technical scheme of the invention, a bracket is arranged on the rotating shaft, and the permanent magnet is connected with the rotating shaft through the bracket.
As a further preferable technical scheme of the invention, the gear mechanism comprises a first gear and a second gear meshed with the first gear, the first rotating wheel and the first gear are coaxially arranged, the second gear is connected with the damping element, and the elastic element can drive the first gear to rotate to drive the second gear to rotate when the elastic element is discharged.
As a further preferable technical scheme of the invention, the friction wheel mechanism comprises a first friction wheel and a second friction wheel, the first friction wheel and the first friction wheel are coaxially arranged, the first friction wheel and the second friction wheel are in fit friction transmission, the second friction wheel is connected with the damping element, and the elastic element can drive the first friction wheel to rotate to drive the second friction wheel to rotate when the elastic element is discharged.
As a further preferable technical scheme of the invention, the synchronous pulley mechanism comprises a driving wheel and a driven wheel, the first rotating wheel and the driving wheel are coaxially arranged, the driving wheel and the driven wheel are connected through a synchronous belt, the second driven wheel is connected with the damping element, and the elastic element can drive the driving wheel to rotate to drive the driven wheel to rotate when discharging energy.
As a further preferable technical scheme of the invention, the synchronous belt is a belt, and the belt is in tensioning connection with the driving wheel and the driven wheel.
As a further preferable technical scheme of the invention, the synchronous belt is a chain, the driving wheel and the driven wheel are both chain wheels, and the chain wheels are connected with the chain in a meshed manner.
In a second aspect, the present invention further provides a design method of the stiffness-variable vibration damping mechanical device for unidirectional energy transfer, where the elastic element adopts a torsion spring, and the additional damping ratio of the controlled structure is:
wherein k is the rigidity of the controlled structure, m is the mass of the controlled structure,for the elastic stiffness of the torsion spring, I 1 R is the moment of inertia of the first wheel and the ratchet wheel 1 Is the radius of the first wheel.
By adopting the design method of the variable-stiffness vibration damping mechanical device for unidirectional energy transmission, which is disclosed by the invention, a double-ratchet structure is used, and the additional damping ratio required by a controlled structure can be designed by adjusting the elastic stiffness of the torsion spring, the rotational inertia of the first rotating wheel and the ratchet wheel and the radius of the first rotating wheel.
In summary, due to the adoption of the technical scheme, the beneficial effects of the invention are as follows:
1. according to the variable stiffness vibration reduction mechanical device for unidirectional energy transmission, the first ratchet mechanism is arranged to perform unidirectional intervention on vibration of a controlled structure, so that the elastic element can absorb vibration energy of the controlled structure during intervention and recover deformation to release energy when the elastic element does not intervene, and the transmission mechanism and the first ratchet mechanism are arranged to enable the energy released by the elastic element to be dissipated only by the damping element and not returned to the controlled structure, so that unidirectional transmission of vibration energy of the controlled structure is realized, the stiffness of the system structure is changed through the action of the elastic element and the damping element, the device is simple in structure, convenient to use, good in effect and capable of maximizing consumption of vibration energy of the controlled structure;
2. the design method of the variable stiffness vibration damping mechanical device for unidirectional energy transfer uses a double-ratchet structure, and can design an additional damping ratio required by a controlled structure by adjusting the elastic stiffness of the torsion spring, the rotational inertia of the first rotating wheel and the ratchet wheel and the radius of the first rotating wheel.
Drawings
FIG. 1 is a schematic structural diagram of a variable stiffness vibration damping mechanism for unidirectional energy transfer in example 1;
FIG. 2 is a schematic view of the structure of the second rotor and damping element of embodiment 1;
FIG. 3 is a schematic diagram of a first stage of the working principle in example 1;
FIG. 4 is a schematic diagram of the second stage of the working principle in example 1;
fig. 5 is a schematic diagram of the third stage of the working principle in example 1.
The marks in the figure: the device comprises a 1-ratchet bar, a 2-ratchet, a 3-torsion spring, a 4-first pawl, a 5-first rotating wheel, a 6-second pawl, a 7-second rotating wheel, an 8-shell, a 9-conductor plate, a 10-permanent magnet and an 11-bracket.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Example 1
As shown in fig. 1 to 5, the variable stiffness vibration damping mechanical device for unidirectional energy transmission according to the present invention includes a first ratchet mechanism, a transmission mechanism, an elastic element and a damping element.
The first ratchet mechanism is used for being connected between the controlled structure and the transmission mechanism, the first ratchet mechanism is connected with the elastic element, the transmission mechanism is connected with the damping element, the movement of the controlled structure can enable the first ratchet mechanism to rotate, so that the elastic element stores energy, and the damping element can work through the transmission mechanism when the elastic element discharges energy.
In this embodiment, as shown in fig. 1, the first ratchet mechanism includes a ratchet bar 1 and a first rotating wheel 5, a plurality of first pawls 4 capable of being matched with the ratchet bar 1 are disposed on the first rotating wheel 5, the first rotating wheel 5 is connected with the elastic element, the ratchet bar 1 is used for connecting a controlled structure, the first rotating wheel 5 is connected with the transmission mechanism, the ratchet bar 1 can drive the first rotating wheel 5 to rotate, the first rotating wheel 5 rotates to drive the elastic element to store energy, and the elastic element is a torsion spring 3.
In a specific embodiment, the ratchet bar 1 comprises a ratchet region and a light plate region, as shown in fig. 1.
In this embodiment, as shown in fig. 1, the transmission mechanism is a second ratchet mechanism, the second ratchet mechanism includes a ratchet 2 and a second rotating wheel 7, the first rotating wheel 5 and the ratchet 2 are coaxially disposed, a plurality of second pawls 6 capable of being matched with the ratchet 2 are disposed on the second rotating wheel 7, the second rotating wheel 7 is connected with the damping element, when the elastic element unloads energy, the elastic element can drive the ratchet 2 to rotate so as to drive the second rotating wheel 7 to rotate, the damping element is a rotary damper, and the rotary damper is a liquid damper, a gas damper or an electromagnetic damper.
In a specific embodiment, as shown in fig. 2, the electromagnetic damper includes a conductor plate 9 and a permanent magnet 10, the second rotating wheel 7 includes a rotating shaft and a housing 8 rotationally matched with the rotating shaft, the second pawl 6 is connected to the outside of the housing 8, the conductor plate 9 is connected to the inside of the housing 8, a bracket 11 is arranged on the rotating shaft, and the permanent magnet 10 is connected to the rotating shaft through the bracket 11, where the housing 8 and the bracket 11 are both of steel structures, so that the magnetic flux can be increased.
The working principle of the variable stiffness vibration damping mechanical device for unidirectional energy transfer is as follows:
in the first stage, as shown in fig. 3, when the controlled structure does not vibrate, the controlled structure is set to be in a balance position, and at the moment, the first pawl 4 is positioned at the junction of the ratchet region of the ratchet bar 1 and the light plate region, the left side of the ratchet bar 1 is shown as the ratchet region, and the right side is shown as the light plate region; when the ratchet bar 1 moves rightwards along with the controlled structure, the ratchet on the ratchet bar 1 slides on the first pawl 4, the first rotating wheel 5 does not rotate along with the movement of the ratchet bar 1, the torsion spring 3 does not elastically deform, and the ratchet 2, the shell 8 and the conductor plate 9 do not rotate.
In the second stage, as shown in fig. 4, under the driving of the controlled structure, the ratchet bar 1 starts to turn around and move to the left after reaching the rightmost end, at this time, the ratchet on the ratchet bar 1 is inserted into the first pawl 4 to drive the first rotating wheel 5 and the ratchet 2 to rotate clockwise, the rotation of the first rotating wheel 5 causes the torsion spring 3 to generate elastic deformation energy storage, the kinetic energy generated by the vibration of the controlled structure is converted into the elastic potential energy of the torsion spring 3, and when the ratchet 2 rotates, the ratchet on the ratchet 2 slides on the second pawl 6, and the shell 8 and the conductor plate 9 cannot rotate along with the rotation of the ratchet 2.
In the third stage, as shown in fig. 5, under the drive of the controlled structure, the ratchet bar 1 returns to the equilibrium position and then continues to move leftwards, at this time, the first pawl 4 is separated from the ratchet teeth on the ratchet bar 1, the elastic potential energy stored in the torsion spring 3 corresponding to the light plate area is released, so as to drive the first rotating wheel 5 and the ratchet wheel 2 to rotate anticlockwise, at this time, the ratchet teeth on the ratchet wheel 2 are inserted into the second pawl 6 to drive the housing 8 to rotate clockwise, so as to drive the conductor plate 9 to move relative to the permanent magnet 10, thereby cutting the magnetic induction line generated by the permanent magnet 10 and performing eddy current energy consumption.
The variable stiffness vibration damping mechanical device capable of unidirectional energy transmission is characterized in that the first ratchet mechanism is arranged to perform unidirectional intervention on vibration of a controlled structure, so that the elastic element can absorb vibration energy of the controlled structure when in intervention, and can recover deformation to release energy when not in intervention, the transmission mechanism and the first ratchet mechanism are arranged to enable the energy released by the elastic element to be dissipated by the damping element only, and the energy can not return to the controlled structure, thereby realizing unidirectional energy transmission of the vibration energy of the controlled structure, changing the stiffness of the system structure through the action of the elastic element and the damping element.
Example 2
As shown in fig. 1 to 5, a method for designing a variable stiffness vibration damping mechanical device for unidirectional energy transfer according to embodiment 1 of the present invention includes the following steps:
let x be 0 For the amplitude of vibration of the controlled structure in any period, k is the rigidity of the controlled structure, E p Is the elastic potential energy of the system, E p Can be represented by the following formula (1):
for speed in the second stage, in which the structure is in the maximum displacement positionRepresenting, where m is the mass of the structure being controlled, E k For the kinetic energy of the controlled structure, E k Can be represented by the following formula (2):
is controlled to be in the firstMaximum torsion angle, ++of the torsion spring 3, which occurs when the two phases are in the maximum displacement position>For the rotational angular velocity, E, of the first wheel 5 when the controlled structure is in the maximum displacement position during the second phase q When the controlled structure returns to the equilibrium position, the energy transferred to the first wheel 5 by the controlled structure is E q Can be represented by the following formula (3):
wherein, the liquid crystal display device comprises a liquid crystal display device,for the elastic stiffness of the torsion spring 3, I 1 Is the moment of inertia of the first wheel 5 and the ratchet wheel 2.
From the conservation of energy, it is known that:
E p ＝E k +E q (4)
from the geometrical relationship, it can be seen that:
wherein r is 1 Is the radius of the first wheel 5.
Let x be 1 The vibration amplitude for the next cycle is known from conservation of energy:
let ζ be the additional damping ratio of the controlled structure, then there are:
substituting formulas (1) - (7) into formula (8) can obtain the additional damping ratio of the controlled structure as follows:
in practical engineering, the elastic rigidity of the torsion spring 3 can be designed through the method (9)The moment of inertia I of the first wheel 5 and the ratchet wheel 2 1 The radius r of the first runner 5 1 。
The design method of the variable stiffness vibration damping mechanical device for unidirectional energy transfer of the embodiment uses a double-ratchet structure, and can design an additional damping ratio required by a controlled structure by adjusting the elastic stiffness of the torsion spring 3, the rotational inertia of the first rotating wheel 5 and the ratchet wheel 2, and the radius of the first rotating wheel 5.
Example 3
The variable-stiffness vibration damping mechanical device for unidirectional energy transmission is different from the embodiment 1 in that the transmission mechanism is a gear mechanism in the embodiment.
The gear mechanism comprises a first gear and a second gear, the first gear and the second gear are meshed with each other, the first rotating wheel 5 and the first gear are coaxially arranged, the second gear is connected with the damping element, the damping element adopts an electromagnetic damper, the first gear can be driven to rotate to drive the second gear to rotate when the elastic element discharges energy, and the elastic element adopts a torsion spring 3.
The working principle of the variable stiffness vibration damping mechanical device for unidirectional energy transfer is as follows:
in the first stage, the ratchet bar 1 moves rightwards along with the controlled structure, at this time, the ratchet on the ratchet bar 1 slides on the first pawl 4, the first rotating wheel 5 does not rotate along with the movement of the ratchet bar 1, the torsion spring 3 does not elastically deform, and the first gear, the second gear and the conductor plate 9 do not rotate.
A second stage, in which the ratchet bar 1 moves reversely to the left, and at this time, the ratchet on the ratchet bar 1 is inserted into the first pawl 4 to drive the first rotating wheel 5 and the first gear to rotate clockwise;
the rotation of the first rotating wheel 5 enables the torsion spring 3 to generate elastic deformation energy storage, and kinetic energy generated by the vibration of the controlled structure is converted into elastic potential energy of the torsion spring 3;
the rotation of the first gear drives the second gear to rotate and drives the conductor plate 9 to move relative to the permanent magnet 10, so that magnetic induction lines generated by the permanent magnet 10 are cut, and eddy current energy consumption is carried out.
And in the third stage, the ratchet bar 1 continues to move leftwards, at the moment, the first pawl 4 is separated from the ratchet teeth on the ratchet bar 1, the first pawl 4 corresponds to the light plate area, the elastic potential energy stored in the torsion spring 3 is released, so that the first rotating wheel 5 and the first gear are driven to rotate anticlockwise, at the moment, the first gear drives the second gear to rotate clockwise, the conductor plate 9 is driven to move relative to the permanent magnet 10, and the magnetic induction lines generated by the permanent magnet 10 are cut, so that eddy current energy consumption is carried out.
The variable stiffness vibration damping mechanical device capable of unidirectional energy transmission in the embodiment can absorb the vibration energy of the controlled structure through the elastic element in the second working stage, meanwhile, a part of the vibration energy is dissipated through the damping element, and in the third working stage, the energy released by the elastic element can be dissipated through the damping element and cannot be transmitted back to the controlled structure, so that unidirectional energy transmission of the controlled structure is realized, and meanwhile, the energy absorption and energy consumption time is reduced compared with the device in embodiment 1.
Example 4
The variable-stiffness vibration damping mechanical device for unidirectional energy transmission provided by the invention is different from embodiment 3 in that the transmission mechanism is a friction wheel mechanism in the embodiment.
The friction wheel mechanism comprises a first friction wheel and a second friction wheel, the first rotating wheel 5 and the first friction wheel are coaxially arranged, the first friction wheel and the second friction wheel are in fit friction transmission, the second friction wheel is connected with the damping element, and the elastic element can drive the first friction wheel to rotate to drive the second friction wheel to rotate when discharging energy.
Example 5
The variable stiffness vibration damping mechanical device for unidirectional energy transmission provided by the invention is different from embodiment 3 or embodiment 4 in that the transmission mechanism is a synchronous pulley mechanism.
The synchronous pulley mechanism comprises a driving wheel and a driven wheel, the first rotating wheel 5 and the driving wheel are coaxially arranged, the driving wheel and the driven wheel are connected through a synchronous belt, the driven wheel is connected with the damping element, and the elastic element can drive the driving wheel to rotate to drive the driven wheel to rotate when discharging energy.
In a specific embodiment, the synchronous belt is a belt, and the belt is in tension connection with the driving wheel and the driven wheel.
In a specific embodiment, the synchronous belt is a chain, the driving wheel and the driven wheel are sprockets, and the sprockets are in meshed connection with the chain.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (10)
1. The variable stiffness vibration damping mechanical device is characterized by comprising a first ratchet mechanism, a transmission mechanism, an elastic element and a damping element, wherein the first ratchet mechanism is used for being connected between a controlled structure and the transmission mechanism, the first ratchet mechanism is connected with the elastic element, the transmission mechanism is connected with the damping element, the first ratchet mechanism can be rotated by the movement of the controlled structure, so that the elastic element stores energy, and the damping element can work through the transmission mechanism when the elastic element unloads energy.
2. The variable stiffness vibration damping mechanical device for unidirectional energy transmission according to claim 1, wherein the first ratchet mechanism comprises a ratchet bar (1) and a first rotating wheel (5), a plurality of first pawls (4) which can be matched with the ratchet bar (1) are arranged on the first rotating wheel (5), the first rotating wheel (5) is connected with the elastic element, the ratchet bar (1) is used for being connected with a controlled structure, the first rotating wheel (5) is connected with the transmission mechanism, the ratchet bar (1) can drive the first rotating wheel (5) to rotate, and the first rotating wheel (5) rotates to drive the elastic element to store energy.
3. A variable stiffness vibration damping mechanism for unidirectional transmission of energy according to claim 2, characterized in that the elastic element is a torsion spring (3).
4. The variable stiffness vibration reduction mechanism of claim 2 wherein the transmission mechanism is a second ratchet mechanism, a gear mechanism, a friction wheel mechanism or a synchronous pulley mechanism.
5. The variable stiffness vibration damping mechanical device for unidirectional energy transmission according to claim 4, wherein the second ratchet mechanism comprises a ratchet wheel (2) and a second rotating wheel (7), the first rotating wheel (5) and the ratchet wheel (2) are coaxially arranged, a plurality of second pawls (6) which can be matched with the ratchet wheel (2) are arranged on the second rotating wheel (7), the second rotating wheel (7) is connected with the damping element, and the elastic element can drive the ratchet wheel (2) to rotate to drive the second rotating wheel (7) to rotate when the elastic element is discharged.
6. The variable stiffness vibration reduction mechanism of unidirectional energy transfer of claim 5, wherein the damping element is a rotary damper.
7. The variable stiffness vibration reduction mechanism of unidirectional energy transfer of claim 6, wherein the rotary damper is a liquid damper, a gas damper, or an electromagnetic damper.
8. The variable stiffness vibration damping mechanical device according to claim 7, characterized in that the electromagnetic damper comprises a conductor plate (9) and a permanent magnet (10), the second rotating wheel (7) comprises a rotating shaft and a housing (8) in rotating fit with the rotating shaft, the second pawl (6) is connected outside the housing (8), the conductor plate (9) is connected inside the housing (8), and the permanent magnet (10) is connected to the rotating shaft.
9. The variable stiffness vibration damping mechanical device for unidirectional energy transmission according to claim 4, wherein the gear mechanism comprises a first gear and a second gear meshed with the first gear, the first rotating wheel (5) and the first gear are coaxially arranged, the second gear is connected with the damping element, and the elastic element can drive the first gear to rotate to drive the second gear to rotate when the elastic element is discharged.
10. The method for designing the variable stiffness vibration damping mechanical device for unidirectional energy transmission according to claim 5, wherein the elastic element adopts a torsion spring (3), and the additional damping ratio of the controlled structure is as follows:
wherein k is the rigidity of the controlled structure, m is the mass of the controlled structure, k φ For the elastic stiffness of the torsion spring (3), I 1 R is the moment of inertia of the first wheel (5) and the ratchet wheel (2) 1 Is the radius of the first runner (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310314375.4A CN116498681A (en) | 2023-03-28 | 2023-03-28 | Variable-rigidity vibration reduction mechanical device capable of transmitting energy in one direction and design method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310314375.4A CN116498681A (en) | 2023-03-28 | 2023-03-28 | Variable-rigidity vibration reduction mechanical device capable of transmitting energy in one direction and design method |
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| CN116498681A true CN116498681A (en) | 2023-07-28 |
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| CN202310314375.4A Pending CN116498681A (en) | 2023-03-28 | 2023-03-28 | Variable-rigidity vibration reduction mechanical device capable of transmitting energy in one direction and design method |
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| CN (1) | CN116498681A (en) |
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- 2023-03-28 CN CN202310314375.4A patent/CN116498681A/en active Pending
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