CN116085424B - Active and passive composite vibration damping base based on energy level attenuation - Google Patents
Active and passive composite vibration damping base based on energy level attenuation Download PDFInfo
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- CN116085424B CN116085424B CN202310375427.9A CN202310375427A CN116085424B CN 116085424 B CN116085424 B CN 116085424B CN 202310375427 A CN202310375427 A CN 202310375427A CN 116085424 B CN116085424 B CN 116085424B
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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
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/023—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using fluid means
- F16F15/027—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using fluid means comprising control arrangements
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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
- F16F15/002—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion characterised by the control method or circuitry
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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
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
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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
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/022—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using dampers and springs in combination
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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
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
- F16F15/08—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with rubber springs ; with springs made of rubber and metal
- F16F15/085—Use of both rubber and metal springs
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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
- F16F2230/00—Purpose; Design features
- F16F2230/08—Sensor arrangement
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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
- F16F2230/00—Purpose; Design features
- F16F2230/10—Enclosure elements, e.g. for protection
- F16F2230/105—Flexible, e.g. bellows or bladder
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
Abstract
The invention provides an active and passive composite vibration damping base based on energy level damping, and belongs to the field of vibration control of power devices. The problem that the traditional base is poor in low-frequency vibration and line spectrum vibration control is solved. The device comprises a planar hinge panel, piezoelectric sensors, a limiting plate frame, vibration reduction liquid bags, a self-adaptive controller, elastic limiters, actuators and a planar bottom plate, wherein the planar hinge panel is arranged above the planar bottom plate, a plurality of elastic limiters for vertically limiting the planar bottom plate are arranged between the planar hinge panel and the planar bottom plate, the vibration reduction liquid bags uniformly distributed along the left-right direction are arranged in the limiting plate frame, a plurality of actuators are arranged on the lower end face of the limiting plate frame and are connected with the upper end of an actuating head of each actuator, each actuator is correspondingly provided with one piezoelectric sensor, all piezoelectric sensors are connected with the lower end face of the limiting plate frame, and all the actuators and all the piezoelectric sensors are connected with the self-adaptive controller. It is mainly used for damping vibration.
Description
Technical Field
The invention belongs to the field of vibration control of power devices, and particularly relates to an active and passive composite vibration damping base based on energy level damping.
Background
With the vigorous development of modern science and technology, the ship industry is also continuously making new breakthroughs, the ship dimension and the sailing speed are gradually increased, and the phenomenon that the ship generates harmful vibration occurs. The ship power device is used as an important component for ensuring the normal operation and sailing of the ship, mechanical vibration is inevitably generated in the working process, and the vibration energy is transmitted to the plate frame structure of the ship body through the base to cause the vibration response of the plate frame structure and is transmitted to the ship hull in the form of elastic waves to radiate noise to surrounding fluid media. The vibration damping and isolation device is an important barrier for ship vibration control, and the vibration damping performance of the vibration damping and isolation device directly determines the ship radiation noise level.
The traditional base has unsatisfactory vibration reduction effect, can only reduce the total vibration magnitude, and has poor control on low-frequency vibration and line spectrum vibration.
Disclosure of Invention
In view of the above, the present invention is directed to an active-passive composite vibration damping base based on energy level damping, so as to solve the problem that the conventional base has poor control over low-frequency vibration and line spectrum vibration.
In order to achieve the above purpose, the present invention adopts the following technical scheme: the utility model provides an active-passive combined vibration damping base based on energy level decay, includes planar hinge panel, piezoelectric sensor, spacing grillage, damping liquid bag, self-adaptation controller, elasticity stopper, actuator and planar bottom plate, planar hinge panel sets up in planar bottom plate top, set up a plurality of elasticity stoppers that are used for carrying out vertical spacing to planar bottom plate between planar hinge panel and the planar bottom plate, spacing grillage sets up in planar hinge panel below, set up a plurality of damping liquid bags of evenly arranging along left and right sides in the spacing grillage, every damping liquid bag's up end all links to each other with planar hinge panel's lower terminal surface, spacing grillage lower terminal surface sets up a plurality of actuators and links to each other with the action head upper end of every actuator, every the lower extreme of actuator all links to each other with planar bottom plate, every the actuator corresponds and sets up a piezoelectric sensor, all the piezoelectric sensor all links to each other with spacing grillage lower terminal surface, all the actuator with all piezoelectric sensor all links to each other with self-adaptation controller.
Further, the planar hinge panel comprises a plurality of sub-panels which are sequentially arranged along the left-right direction, and every two adjacent sub-panels are rotationally connected.
Further, every two adjacent sub-panels are rotationally connected through a plurality of hinges which are arranged at equal intervals along the front-back direction.
Furthermore, the vibration reduction liquid bags are connected with the lower end surfaces of the sub-panels at the corresponding positions in the same number and in a one-to-one correspondence manner.
Furthermore, the limiting plate frame is provided with a plurality of buffer cavities corresponding to the vibration reduction liquid bags one by one, and all the vibration reduction liquid bags are arranged in the buffer cavities one by one.
Furthermore, two actuators which are symmetrically distributed in the front-back direction are correspondingly arranged below each vibration reduction liquid bag.
Furthermore, the two elastic limiters are symmetrically distributed on the left side and the right side relative to the plane bottom plate, the upper ends of the two elastic limiters are respectively connected with the lower end faces of the sub-panels positioned on the two sides, and the front side and the rear side of the lower end face of each sub-panel positioned in the middle position are symmetrically provided with the elastic limiters.
Still further, the elasticity stopper includes top panel, lower panel, top panel support handle, lower panel support handle and elastomeric element, the top panel links to each other with planar hinge panel lower terminal surface, the top panel support handle is just erectly mountain character structure including middle pole, be both sides symmetrical arrangement's side lever and horizontal pole for the middle pole, middle pole upper end links to each other with top panel lower terminal surface intermediate position, middle pole lower extreme links to each other with the horizontal pole, two side lever symmetrical connection is at the both ends of horizontal pole, every the side lever upper end passes through elastomeric element and links to each other with a lower panel support handle, all lower panel support handle all links to each other with the lower panel, the lower panel links to each other with planar bottom plate up end.
Further, the side rods and the lower panel support handles are connected with the elastic component through the connection ends of the support handles.
Still further, the vibration damping base still includes four rubber callus on the sole, four the rubber callus on the sole is arranged in plane bottom plate terminal surface four corners.
Compared with the prior art, the invention has the beneficial effects that:
1. the planar hinge panel comprises a plurality of sub-panels which are connected in a rotating way, so that structural impedance mismatch can be caused, waveform conversion, scattering and reflection of vibration waves of the sub-panels are obviously increased, part of vibration energy is attenuated, and vibration reduction and isolation performance of the base is effectively improved;
2. through the arrangement of the elastic limiter, the displacement between the planar hinge panel and the planar base can be limited to only occur in the vertical direction, the vertical height of the planar hinge panel is limited to be maintained in a safe range, and the vibration reduction liquid bag is prevented from being crushed and meanwhile the equipment is prevented from being overturned;
3. the input impedance of each sub-panel tends to be balanced by matching the vibration-damping liquid bag with the planar hinge panel, the improvement of impedance equalization reduces the vibration response of the vibration-damping base under the action of unbalanced excitation force and unbalanced excitation moment, and the vibration energy is scattered to different parts of the structure, so that the vibration of the structure is reduced, the concentrated point load is converted into the surface load, and the vibration isolation capability of the system is improved; based on a waveform conversion theory, the characteristic that shear elasticity does not exist in a liquid medium, transverse waves cannot propagate in the liquid medium, when vibration waves generated by mechanical equipment are transmitted to a vibration damping liquid sac, medium mutation occurs in a transmission path, structural impedance mismatch is caused, forced waveform conversion occurs, only longitudinal waves are transmitted to the vibration damping liquid sac, and vibration energy dissipation is realized through liquid in the vibration damping liquid sac; the planar hinge panel is tightly attached to the vibration reduction liquid bag under the pressure of the mechanical equipment, and when the liquid resistance in the vibration reduction liquid bag shows resistance, the liquid provides inertia force, so that vibration energy is effectively controlled;
4. the vibration damping liquid bag is arranged in the buffer cavity, so that the liquid in the vibration damping liquid bag can be prevented from flowing vigorously and plays a certain supporting role;
5. the signal of the limiting plate frame can be acquired through the arrangement of the piezoelectric sensor, and then the actuator is controlled by the self-adaptive controller to actively excite the limiting plate frame, so that active vibration reduction is realized, vibration subjected to active vibration reduction treatment is vibration energy after the elastic limiter and the vibration reduction liquid bag weaken, and only vertical vibration waves remain, so that the actuator does not need to do excessive work, the energy consumption is reduced, meanwhile, a relatively small model can be selected on the type selection of the actuator, and the input cost is also reduced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
FIG. 1 is a schematic diagram of a front view of a passive and active composite vibration damping base based on energy level attenuation according to the present invention;
FIG. 2 is a schematic perspective view of an active-passive composite vibration damping base based on energy level attenuation according to the present invention;
FIG. 3 is a schematic top view of a planar hinge panel according to the present invention;
FIG. 4 is a schematic perspective view of an elastic stopper according to the present invention;
FIG. 5 is a schematic distribution diagram of a vibration damping fluid bladder according to the present invention;
FIG. 6 is a schematic view of the actuator of the present invention;
fig. 7 is a schematic perspective view of an actuator according to the present invention.
A planar hinge panel 1; a hinge 2; a piezoelectric sensor 3; a limiting plate frame 4; a vibration damping fluid bladder 5; an adaptive controller 6; an elastic stopper 7; an upper panel 71; a lower panel 72; an upper panel support handle 73; an intermediate rod 731; side bar 732; a cross bar 733; a lower panel support handle 74; an elastic member 75; a support handle connection end 76; an actuator 8; a planar base plate 9; a rubber foot pad 10; a sub-panel 11; a buffer chamber 12; an actuator head 13.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It should be noted that, in the case of no conflict, embodiments of the present invention and features of the embodiments may be combined with each other, and the described embodiments are only some embodiments of the present invention, not all embodiments.
Referring to fig. 1 to 7, this embodiment is described, a passive and active composite vibration damping base based on energy level attenuation includes a planar hinge panel 1, a piezoelectric sensor 3, a limiting plate frame 4, vibration damping liquid bags 5, an adaptive controller 6, an elastic limiter 7, an actuator 8 and a planar bottom plate 9, the planar hinge panel 1 is disposed above the planar bottom plate 9, a plurality of elastic limiters 7 for vertically limiting the planar bottom plate 9 are disposed between the planar hinge panel 1 and the planar bottom plate 9, the limiting plate frame 4 is disposed below the planar hinge panel 1, a plurality of vibration damping liquid bags 5 uniformly distributed along a left-right direction are disposed in the limiting plate frame 4, an upper end face of each vibration damping liquid bag 5 is connected with a lower end face of the planar hinge panel 1, a lower end face of each limiting plate frame 4 is provided with a plurality of actuators 8 and is connected with an upper end of an actuating head 13 of each actuator 8, each actuator 8 is connected with the planar bottom plate 9, each piezoelectric sensor 3 is correspondingly disposed between each actuator 8, and all piezoelectric sensors 4 are connected with all actuators 6 and all piezoelectric sensors 6 are connected with all adaptive controllers.
In this embodiment, the planar hinge panel 1 includes a plurality of sub-panels 11 sequentially arranged in the left-right direction, and every two adjacent sub-panels 11 are rotatably connected. Through the relative rotation that can take place between the sub-panel 11, can be with the discretization of plane hinge panel 1 processing initiation structure abrupt change, and then lead to structural impedance mismatch, the vibration wave waveform conversion of sub-panel, scattering and reflection are obviously increaseed, have attenuated partial vibration energy, effectively improve the vibration damping base's of this vibration damping performance that subtracts. The whole structure of the planar hinge panel 1 is 1080mm long, 720mm wide and 5mm thick. The number of the sub-panels 11 is four, and each sub-panel 11 is 720mm long, 260mm wide and 5mm thick.
In this embodiment, every two adjacent sub-panels 11 are rotatably connected by a plurality of hinges 2 arranged at equal intervals in the front-rear direction. The hinge 2 has a length of 120mm and a width of 90mm, and is composed of left and right parts, and two adjacent sub-panels 11 can rotate relatively by the hinge 2.
In this embodiment, the vibration-damping fluid bags 5 are connected to the lower end surfaces of the sub-panels 11 at the corresponding positions in the same number and in a one-to-one correspondence. The input impedance of each sub-panel 11 tends to be balanced through the vibration reduction liquid bag 5, the improvement of impedance equalization reduces the vibration response of the vibration reduction base when the vibration reduction base is acted by unbalanced excitation force and unbalanced excitation moment, and the vibration energy is scattered to different parts of the structure, so that the vibration of the structure is reduced, the concentrated point load is converted into the surface load, and the vibration isolation capability of the system is improved; based on waveform conversion theory, shear elasticity does not exist in a liquid medium, transverse waves cannot propagate in the liquid medium, when vibration waves generated by mechanical equipment are transmitted to the vibration damping liquid bag 5, medium mutation occurs in a transmission path, structural impedance mismatch is caused, forced waveform conversion occurs, only longitudinal waves are transmitted to the vibration damping liquid bag 5, and vibration energy dissipation is achieved through liquid in the vibration damping liquid bag. The planar hinge panel is closely attached to the vibration damping fluid bladder under the pressure of the mechanical device, and when the impedance of the fluid in the vibration damping fluid bladder is represented as resistance, the fluid provides inertial force, effectively controlling vibration energy.
In this embodiment, the limiting plate frame 4 is provided with a plurality of buffer cavities 12 corresponding to the vibration-damping liquid bags 5 one by one, and all the vibration-damping liquid bags 5 are arranged in each buffer cavity 12 one by one. Through the setting of cushion chamber 12, can carry out the subregion to every damping liquid bag 5, avoid the liquid in the damping liquid bag 5 to flow violently, further reach the purpose of damping when guaranteeing stability. The vibration reduction liquid bags 5 are four, the length of each vibration reduction liquid bag 5 is 600mm, the width of each vibration reduction liquid bag 5 is 240mm, the height of each vibration reduction liquid bag is 125mm, the outer layer is made of rubber materials, liquid is filled in the vibration reduction liquid bags, chamfering treatment is carried out on the edges of all vibration reduction liquid bags 5, the vibration reduction liquid bags 5 are provided with openings, sealing layers are arranged at the openings, and the liquid can be replaced according to requirements. The limiting plate frame 4 is formed by welding a bottom plate and side limiting baffles, the bottom plate is 980mm long, 630mm wide and 8mm thick, the side limiting baffles are 130mm high, 70mm wide and 5mm thick.
In this embodiment, two actuators 8 symmetrically distributed in front-back are correspondingly disposed below each vibration damping fluid bladder 5. Since the vibration is transmitted downwards after being damped by the damping liquid bags 5, two actuators 8 are arranged below each damping liquid bag 5, and the actuators 8 at corresponding positions are matched with the corresponding piezoelectric sensor 3 and the adaptive controller 6 to actively excite the limiting plate frame 4, so that the vibration is further damped. The height of the actuator 8 is 90mm, the actuating head of the actuator 8 is connected with the lower end face of the limiting plate frame 4, the diameter of the base of the actuator 8 is 150mm, and the diameter of the actuating head is 40mm.
In this embodiment, the two elastic limiters 7 are symmetrically distributed on the left and right sides with respect to the planar bottom plate 9, and the upper ends of the two elastic limiters are respectively connected to the lower end surfaces of the sub-panels 11 located on the two sides, and the elastic limiters 7 are symmetrically disposed on the front and rear sides of the lower end surface of each sub-panel 11 located in the middle position. The distribution form of the elastic limiters 7 can ensure that each sub-panel 11 is effectively limited and supported, so that the sub-panels 11 cannot move downwards by too large amplitude, and the vibration reduction liquid bags 5 are prevented from being crushed. The elastic stopper 7 has an overall height of 225mm.
In this embodiment, the elastic limiter 7 includes an upper panel 71, a lower panel 72, an upper panel support handle 73, a lower panel support handle 74 and an elastic component 75, where the upper panel 71 is connected to the lower end face of the planar hinge panel 1, the upper panel support handle 73 is in an upright mountain-shaped structure and includes a middle rod 731, side rods 732 and a cross rod 733 symmetrically arranged on two sides with respect to the middle rod 731, the upper end of the middle rod 731 is connected to the middle position of the lower end face of the upper panel 71, the lower end of the middle rod 731 is connected to the cross rod 733, two side rods 732 are symmetrically connected to two ends of the cross rod 733, each upper end of the side rod 732 is connected to one lower panel support handle 74 through an elastic component 75, all the lower panel support handles 74 are connected to the lower panel 72, and the lower panel 72 is connected to the upper end face of the planar bottom plate 9. The elastic member 75 can provide elastic support for the upper panel 71, and can provide passive vibration damping for the vibration damping base, and can provide passive vibration damping while preventing the sub-panel 11 from crushing the vibration damping liquid bladder 5. The lower panel 72 has a length of 180mm, a width of 40mm, a thickness of 2mm, the middle rod 731 of the upper panel support handle 73 has a length of 185mm, the lower panel support handle 74 has a length of 185mm, the elastic member 75 has an initial length of 60mm,
in this embodiment, the side bars 732 and the lower panel support handles 74 are each connected to an elastic member 75 by a support handle connection end 76. The provision of the support handle connection end 76 can provide economy and convenience for later disassembly and maintenance.
In this embodiment, the vibration damping base further comprises four rubber foot pads 10, and the four rubber foot pads 10 are arranged at four corners of the lower end surface of the planar base plate 9. The rubber foot 10 is capable of further damping vibration. The rubber foot 10 is directly connected with the hull plate and plays a role in fixing the vibration reduction base.
When the vibration damping base is used, the vibration damping base is placed on a ship body plate, equipment to be damped is placed on the upper end face of the planar hinge panel 1, structural mutation is caused by discretization of the planar hinge panel 1 when vibration occurs, structural impedance mismatch is further caused, waveform conversion, scattering and reflection of vibration waves of the sub-panel are obviously increased, part of vibration energy is damped, vibration is transmitted downwards to the vibration damping liquid bag 5 to be continuously damped, meanwhile, transverse waves are removed according to the characteristic of liquid transmission energy, longitudinal waves are continuously transmitted downwards, vibration of the planar hinge panel 1 is damped by the elastic component 75, the elastic component 75 is a spring, and meanwhile, the elastic limiter 7 provides limiting support for the planar hinge panel 1 to prevent the vibration damping liquid bag 5 from being crushed.
The energy attenuated by the vibration reduction liquid bags 5 is continuously downwards transmitted to the limiting plate frame 4, the piezoelectric sensor 3 arranged on the lower end face of the limiting plate frame 4 transmits vibration signals to the self-adaptive controller 6, the self-adaptive controller 6 controls the actuators 8 at corresponding positions to excite and offset the downward vibration energy, the downward vibration transmission to the plane bottom plate 9 is prevented, the further vibration reduction effect can be achieved by the rubber foot pads 10 below the plane bottom plate 9, and the downward energy transmission to the hull plate is weakened in a layer-by-layer decreasing mode.
The sensors, controllers and control programs that may be used in the above description are all of the prior art, and are not described herein.
The embodiments of the invention disclosed above are intended only to help illustrate the invention. The examples are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand and utilize the invention.
Claims (6)
1. An active and passive composite vibration damping base based on energy level attenuation is characterized in that: the device comprises a planar hinge panel (1), piezoelectric sensors (3), a limiting plate frame (4), vibration damping liquid bags (5), a self-adaptive controller (6), elastic limiters (7), actuators (8) and a planar bottom plate (9), wherein the planar hinge panel (1) is arranged above the planar bottom plate (9), a plurality of elastic limiters (7) for vertically limiting the planar bottom plate (9) are arranged between the planar hinge panel (1) and the planar bottom plate (9), the limiting plate frame (4) is arranged below the planar hinge panel (1), a plurality of vibration damping liquid bags (5) which are uniformly distributed along the left-right direction are arranged in the limiting plate frame (4), the upper end face of each vibration damping liquid bag (5) is connected with the lower end face of the planar hinge panel (1), the lower end face of each limiting plate frame (4) is provided with a plurality of actuators (8) and is connected with the upper end of an actuating head (13) of each actuator (8), the lower end of each actuator (8) is connected with the planar bottom plate (9), each actuator (8) is correspondingly provided with one piezoelectric sensor (3) and is connected with all piezoelectric sensors (4), all the actuators (8) and all the piezoelectric sensors (3) are connected with the adaptive controller (6);
the planar hinge panel (1) comprises a plurality of sub-panels (11) which are sequentially arranged along the left-right direction, wherein every two adjacent sub-panels (11) are rotationally connected, and the vibration reduction liquid bags (5) are connected with the lower end surfaces of the sub-panels (11) at the corresponding positions, wherein the number of the vibration reduction liquid bags is the same as that of the sub-panels (11) and the vibration reduction liquid bags are in one-to-one correspondence with the sub-panels; a plurality of buffer cavities (12) which are in one-to-one correspondence with the vibration reduction liquid bags (5) are arranged on the limiting plate frame (4), and all the vibration reduction liquid bags (5) are arranged in each buffer cavity (12) in one-to-one correspondence; two actuators (8) which are symmetrically distributed in the front-back direction are correspondingly arranged below each vibration reduction liquid bag (5); the energy attenuated by the vibration reduction liquid bag (5) is continuously transmitted downwards to the limiting plate frame (4), the piezoelectric sensor (3) arranged on the lower end face of the limiting plate frame (4) can transmit vibration signals to the self-adaptive controller (6), and the self-adaptive controller (6) controls the actuators (8) at corresponding positions to excite and offset the downward vibration energy.
2. An active and passive composite vibration damping mount based on energy level attenuation as claimed in claim 1, wherein: every two adjacent sub-panels (11) are rotationally connected through a plurality of hinges (2) which are arranged at equal intervals along the front-back direction.
3. An active and passive composite vibration damping mount based on energy level attenuation as claimed in claim 1, wherein: the two elastic limiters (7) are symmetrically distributed on the left side and the right side relative to the plane bottom plate (9), the upper ends of the two elastic limiters are respectively connected with the lower end faces of the sub-panels (11) positioned on the two sides, and the elastic limiters (7) are symmetrically arranged on the front side and the rear side of the lower end face of each sub-panel (11) positioned in the middle position.
4. An active and passive composite vibration damping mount based on energy level attenuation as claimed in claim 1, wherein: the elastic limiter (7) comprises an upper panel (71), a lower panel (72), an upper panel support handle (73), a lower panel support handle (74) and an elastic component (75), wherein the upper panel (71) is connected with the lower end face of a planar hinge panel (1), the upper panel support handle (73) comprises a middle rod (731), side rods (732) and a cross rod (733) which are symmetrically arranged on two sides relative to the middle rod (731), the upper end of the middle rod (731) is connected with the middle position of the lower end face of the upper panel (71), the lower end of the middle rod (731) is connected with the cross rod (733), the two side rods (732) are symmetrically connected with the two ends of the cross rod (733), each side rod (732) is connected with one lower panel support handle (74) through the elastic component (75), the lower panel support handles (74) are all connected with the lower panel (72), and the lower panel (72) is connected with the upper end face of a planar bottom plate (9).
5. An active and passive composite vibration damping mount based on energy level attenuation of claim 4, wherein: the side bars (732) and the lower panel support handles (74) are connected with the elastic component (75) through the support handle connecting ends (76).
6. An active-passive composite vibration damping mount based on energy level attenuation according to any one of claims 1-5, wherein: the vibration reduction base further comprises four rubber foot pads (10), and the four rubber foot pads (10) are arranged at four corners of the lower end face of the planar base plate (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310375427.9A CN116085424B (en) | 2023-04-11 | 2023-04-11 | Active and passive composite vibration damping base based on energy level attenuation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310375427.9A CN116085424B (en) | 2023-04-11 | 2023-04-11 | Active and passive composite vibration damping base based on energy level attenuation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116085424A CN116085424A (en) | 2023-05-09 |
| CN116085424B true CN116085424B (en) | 2023-06-23 |
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