348 results about "Vibration exciter" patented technology

The invention discloses a loss tuning method of a power transformer, which is applied to a transformer body sleeved with a winding and comprises the following steps: applying scanning current excitation containing fundamental waves and harmonic waves to the winding, synchronously acquiring a body vibration signal and converting the body vibration signal into a frequency spectrum; extracting a formant from the frequency spectrum, matching the formant with a theoretical electromagnetic force wave and a structure inherent frequency library, and identifying a coupling formant to be optimized; aiming at each formant, installing a vibration exciter in a corresponding area, sending out an anti-phase periodic pulse force, and dynamically and finely adjusting a pulse force parameter by monitoring a vibration response in real time and taking equivalent mechanical impedance minimization as a target; when the optimal damping state is achieved, the vibration exciter output rod is locked, and static pre-tightening force is formed; and after all formants are adjusted and optimized in sequence and the prestress is locked, final pressing and fixing of the transformer body are completed in the state that the pretightening force is kept. According to the invention, the dynamic loss source of the individual transformer can be actively inhibited and cured before assembly and curing, the operation loss and noise are effectively reduced, and the structural stability is improved.

The invention discloses high-voltage wiring harness connector terminal fretting wear test equipment which comprises an equipment base, a high-frequency vibration exciter and a lifting platform are mounted on the equipment base, and a mounting platform is arranged at the top of the lifting platform; a left test piece mounting loading mechanism and a right test piece mounting force measuring device are arranged on the mounting platform. The device can realize a multi-physics field coupling test, current-carrying friction and arc erosion of an electric contact surface in a real working condition are simulated by combining a current load with high-frequency mechanical wear, and the electric-mechanical coupling wear characteristic of a new energy automobile charging terminal is accurately reproduced. The device supports the dynamic adjustment of normal load, simulates the contact pressure change of the left and right test samples of the test terminal in the plugging process through the test sample pin and the test sample jack, can be used for researching the relevance between the fretting wear and the contact resistance of the test terminal under different loads, and realizes the test of the terminal under complex working conditions in a laboratory environment. The test process is convenient, efficient and accurate, and the test cost and the test period are greatly reduced.

The invention discloses a large-stroke hydraulic vibration horizontal test bed, which is used for solving the problems of interference, abrasion and easy fatigue fracture of a force transmission component caused by a centering error between a large-stroke hydraulic vibration exciter and a horizontal table board. The test bed comprises a base, a hydraulic vibration exciter, a horizontal table top and a spring plate assembly connecting the base and the hydraulic vibration exciter. A function decoupling design is adopted, wherein a guide rail compensation block with horizontal transverse elasticity is arranged in a guide mechanism between a horizontal table top and a base and is specially used for dynamically compensating centering errors in the horizontal direction; meanwhile, the spring plate assembly is constructed to be composed of multiple layers of stacked spring plates parallel to the horizontal table top, centering errors in the vertical direction are dynamically compensated through bending flexibility of the spring plates in the vertical plane, the working stress is greatly reduced through the multi-layer structure, and the fatigue life is prolonged. By means of the design, unification of high-rigidity excitation force transmission and multi-dimensional dynamic error compensation is achieved, the reliability and precision of equipment are remarkably improved, and the service life of the equipment is remarkably prolonged.

The invention provides a crimping quality online detection method and system based on acoustic emission signal analysis, relates to the technical field of industrial detection, and solves the technical problems that an existing detection method is not sensitive to early defects and is insufficient in adaptability under complex working conditions. The method comprises the following steps: applying mechanical excitation to the crimping structure, exciting the crimping structure to generate vibration response, and synchronously collecting a vibration response signal and an acoustic emission signal; wherein the mechanical excitation represents sweep frequency excitation or pulse excitation generated by a piezoelectric vibration exciter or an impact hammer so as to excite a plurality of co-frequency offset vibration modes of the crimping structure; calculating the resonant frequency of the crimping structure based on the vibration response signal; calculating frequency offset characteristic parameters according to the resonant frequency based on an inversion method of a physical model; calculating acoustic emission signal characteristic parameters based on the acoustic emission signals; and identifying the type and severity of the crimping defect by utilizing a D-S evidence theory and combining the frequency offset characteristic parameters and the acoustic emission signal characteristic parameters.

The invention relates to a vibration excitation method and system based on impedance identification, and the method comprises the steps: carrying out the frequency domain conversion of force-speed data obtained by a displacement closed-loop system, and obtaining the mechanical impedance of a drive point; performing flexibility compensation on the mechanical impedance of the driving point to obtain the real impedance of the structure end; extracting an imaginary part and constructing a matching residual error by using the real impedance of the structure end, correcting the excitation frequency of the current vibration exciter through gradient frequency, and iteratively determining the optimal excitation frequency of the vibration exciter meeting a convergence condition; mechanical active power generated by the vibration exciter is calculated under the optimal excitation frequency, dual-target optimization is carried out on the amplitude of the vibration exciter, and the optimal amplitude with the maximum mechanical active power and the minimum equivalent output of the actuator is obtained; based on the real impedance of the structure end, the matching criterion and the optimal amplitude, variable parameters are introduced to construct a source-side impedance model, a source-side impedance matching frequency domain interval is expanded through slow time mark setting parameters, and mechanical active power generated by a vibration exciter is coupled to a tested structure.

A vibrating plate for compacting a floor has an upper mass; a lower mass movable relative to the upper mass; a vibration exciter for generating vibrations for compacting the floor; and a vibration decoupling device arranged between the upper mass and the lower mass. The the upper mass has components selected from the group consisting of a drive for driving the vibration exciter, an energy storage for the drive, a frequency converter, and electronic components. The lower mass has a floor contact plate for introducing the vibrations into the floor to be compacted. The vibration decoupling device has a plurality of attachment points to which the upper mass is attached. The upper mass has a one-piece shell body that at least partially encloses at least some of the components of the upper mass and that is attached to the vibration decoupling device at the attachment points.

The invention discloses a turbine blade crown damping structure vibration characteristic test device and method. The device comprises a workbench, a mounting plate, a blade clamp, a first clamping plate, a second clamping plate, a first limiting block, a second limiting block, a first pressure sensor, a second pressure sensor, a pre-tightening module, a vibration exciter, an acceleration sensor and a control module. During working, the positive pressure of the blade crown is adjusted through the pre-tightening module, the excitation force is directly applied to a test piece through the vibration exciter, and feedback data is obtained through the acceleration sensor. The technical problems that the loading force cannot be adjusted, the loading precision is poor or the loading force is easy to attenuate in the prior art are solved; the universality of the whole test device for turbine blades of different specifications is improved; the coupling interference of the loading mechanism on the excitation signal is avoided; the test process and procedure are simplified, and the test preparation time and efficiency are remarkably improved.

The vibration exciter fixing device for pool vibration monitoring comprises a pool, sliding guide rails are arranged at the tops of the two sides of the outer surface of the pool, sliding trolleys are connected to the sliding guide rails in a sliding mode, a movable supporting frame is arranged at the tops of the two sliding trolleys, and a middle protrusion is arranged in the center of the movable supporting frame. The bottom of the middle protrusion is provided with an inner cavity, the top of the inner cavity is fixedly connected with a second telescopic air cylinder, the telescopic end of the second telescopic air cylinder is provided with a top seat, four corners of the bottom of the top seat are provided with connecting rods, the bottoms of the connecting rods are provided with bases, and the center of the bottom of the top seat is fixedly connected with a first telescopic air cylinder. According to the utility model, the vibration exciter can move in the horizontal longitudinal direction and the vertical plane, so that the excitation position of the vibration exciter can be quickly and flexibly adjusted, the condition that excitation is carried out from the outside of a test model in a pool vibration noise test is met, and the device has certain practicability.

The utility model discloses a kind of vibration exciter and electronic equipment, it is related to vibration device technical field, the vibration exciter includes shell, the vibrator subassembly and stator subassembly received in shell, vibrator subassembly is suspended in shell, including annular magnetic conductive plate, annular magnetic conductive plate inner surface opposite side is equipped with first magnet and second magnet;Stator subassembly includes coil and the support of coil fixed in shell, coil is located between first magnet and second magnet;Vibration exciter further includes FPC, FPC includes main part and bending part, main part and bending part are fixed on the outer surface of two adjacent side walls of shell, two first soldering pads are equipped on main part, two second soldering pads are equipped on bending part.The FPC of the vibration exciter and electronic equipment of the utility model embodiment is integrated structure, not only make full use of space, but also assembly welding is convenient, FPC's length can also be reduced, reduce cost.

The utility model discloses a flange type thin oil vibration exciter, and relates to the technical field of vibration exciters. The rotary shaft comprises a fixed shell, a rotary shaft assembly, an inner sleeve, shaft seals and an eccentric block, the two ends of the fixed shell are fixedly communicated with main mounting rings, the shaft seals are movably connected into the two main mounting rings, and bearings are fixed to the ends, close to each other, of the two shaft seals; the shaft body jointly penetrates through the two shaft seals and the two bearings, a shaft sleeve is fixed on the outer peripheral surface of the shaft body between the two bearings, the outer side of the shaft sleeve is movably connected with an inner sleeve, and eccentric blocks are in key connection with the peripheral sides of the shaft body at the ends, far away from each other, of the two shaft seals. Through the arrangement of the fixed shell, the rotating shaft assembly, the inner sleeve, the shaft seal and the eccentric block, the problems that sealing can be achieved only through larger pressing force between the lubricating oil shell and the shaft seal of the flange type thin oil vibration exciter, assembling is inconvenient, and lubricating oil in the whole shell is not used uniformly are solved.

The application belongs to the technical field of vibration exciters, and discloses a high-frequency-response screen sound-producing vibration exciter, which comprises an exciter main body, a plurality of mounting grooves capable of hiding screw rods are arranged on the exciter main body, two rotating shafts are rotatably arranged in the mounting grooves, a threaded sleeve is arranged in the mounting groove, a connecting screw rod for connecting a screen is arranged in the threaded sleeve, and the outer walls of the middle sections of the threaded sleeve are fixedly connected with the two rotating shafts in the mounting groove; after the connecting screw rod is controlled to rotate until the connection between the exciter main body and the screen is disconnected, the connecting screw rod does not need to be completely screwed out of the threaded sleeve, the rotating disc is controlled to rotate until the actuating piece is attached to the limiting protrusion, and then the threaded sleeve and the connecting screw rod are stored in the mounting groove, so that the loss of the connecting screw rod can be avoided.

The application discloses a paraffin solid sealing furnace for a vehicle-mounted superconducting magnet coil, wherein the melting paraffin cabin and the solid sealing cabin are combined into one, and the structure is compact; the paraffin groove is arranged in the solid sealing furnace, the original paraffin pipeline exposed to the environment can be cancelled, the temperature reduction, solidification, blockage and injection of paraffin in the pipeline due to flow can be avoided, the pouring process is smooth and controllable, and a good solid sealing effect is achieved. In terms of temperature control, mainly using air convection to conduct heat transfer, scientifically arranging the electric heating pipe and the turbulence fan, effectively eliminating the temperature gradient inside the coil and the paraffin, and improving the uniformity of the temperature distribution. In terms of pouring control, the vibration exciter arranged below the superconducting coil tray can effectively accelerate the discharge of bubbles inside the coil. In terms of vacuum control, only slight negative pressure in the furnace needs to be maintained, which greatly reduces the performance of the vacuum pump, the sealing requirement of the furnace body, the manufacturing difficulty and the cost.

The utility model relates to the technical field of musical instruments, in particular to a piano function enhancing device. The utility model provides a piano function enhancing device. The piano function enhancing device comprises a power amplifier and a vibration excitation assembly, the power amplifier is electrically connected with the vibration excitation assembly; the vibration excitation assembly comprises a vibration exciter, a conduction base and a fixing piece, the vibration exciter is fixedly connected with the conduction base, the fixing piece is used for detachably and fixedly connecting the conduction base with a wall bar of the piano, the conduction base is further provided with an abutting face used for abutting against a soundboard of the piano, and the conduction base is fixedly connected with the wall bar of the piano through the abutting face. The abutting surface is used for transmitting vibration of the vibration exciter to a soundboard of the piano. According to the technical scheme, the electronic audio signals are converted into mechanical vibration energy through cooperative work of the power amplifier and the vibration excitation assembly, the function of the piano is enhanced, the piano has the function of a sound box, and the piano can interact with electronic equipment and play the electronic audio signals in the electronic equipment.

The application relates to a seat vibration target basis acquisition method and device, and relates to the technical field of automobile seat design. The method comprises the following steps: a vibration is sent by using a vibration exciter preset on a seat in response to a vibration control instruction; seat vibration intensity, brain wave intensity of a to-be-tested person on the seat and vibration perception intensity are obtained by monitoring; and a vibration relationship function is constructed based on seat vibration intensity corresponding to different vibration control instructions and brain wave intensity and vibration perception intensity of different to-be-tested persons on the seat. The application obtains a seat vibration performance target, sets a target value for seat vibration of different vehicle models, prevents the target setting of seat vibration from being too severe or too loose, ensures that mass-produced vehicle models have market competitiveness, and also reduces research and manufacturing costs.

The application provides a multi-excitation vibrator vibration test control method, device, terminal and medium, the method comprises the following steps: obtaining a multi-channel white noise signal and a multi-channel output signal, and obtaining an adaptive inverse matrix according to the multi-channel white noise signal and the multi-channel output signal; the driving signal of the current frame is applied to the test piece through the excitation vibrator, and the test piece response signal is obtained; the dynamic target phase is obtained according to the test piece response signal; the driving signal of the next frame is obtained according to the dynamic target phase, the test piece response signal, the driving signal of the current frame and the adaptive inverse matrix, and the test piece is controlled according to the driving signal of the next frame through the excitation vibrator, and the test piece response signal of the next frame is obtained. The inter-channel antagonistic effect is eliminated, the error is efficiently eliminated, the number of iterations required to reach the target spectrum tolerance band is shortened, and the control convergence speed is improved.

The application discloses a kind of simulation vibration excitation method and system for power transmission tower, belong to electric power engineering and structural health monitoring field, its method includes: obtaining tower finite element model;Deploy flexible exciter array, the array includes permanent magnet adsorption exciter unit and tunable resonance coupling layer;Determine target vibration mode, set mixed excitation parameter set;Perform target mode decoupling cooperative control, produce collaborative drive signal and excite tower;Real-time monitoring dynamic response data and carry out closed-loop control;Finally extract damage identification feature to assess structural safety.The application adopts flexible exciter array, acoustic wave-mechanical hybrid excitation and mode decoupling cooperative control technology, can realize the accurate excitation of specific vibration mode of power transmission tower, solve the problem that traditional excitation device is difficult to simulate low-frequency long-period vibration, improve the simulation fidelity of vibration excitation and the sensitivity of structural damage identification.

The invention discloses a precise measurement method for object surface out-of-plane displacement under high-frequency micro-vibration. The method comprises the following steps: exciting an object to generate high-frequency steady-state vibration through a vibration exciter, freezing a surface state at any vibration position of the object by adopting stroboscopic pulse laser with strictly same frequency as the vibration, and forming a shear speckle field by utilizing a Michelson interferometer comprising a piezoelectric ceramic driving phase-shifting mirror. The movement of the phase shift mirror and the acquisition of the high-speed camera as well as the actions of the stroboscopic laser and the vibration exciter are synchronously controlled through the double-signal controller, so that the accurate acquisition of multiple phase shift speckle interference images is realized. The image is processed based on a four-step phase shift algorithm, and the phase difference of the vibration position is calculated, so that the out-of-plane displacement derivative and the out-of-plane displacement in the shearing direction are calculated. According to the invention, the signal-to-noise ratio and the sensitivity of vibration measurement are obviously improved, and the method has full-field, non-contact and micro-nano displacement resolution capabilities, and is suitable for the fields of material nondestructive testing and structure health monitoring.

The utility model discloses bridge bearing capacity nondestructive testing device belongs to bridge bearing capacity detection technical field, and its technical key points include clamping subassembly, exciter subassembly, limiting component and hoist subassembly. The utility model, when the bearing capacity of bridge is detected, in order to avoid damaging bridge during detection, therefore can first place the piece and connect on bridge guardrail, at this time through hoist subassembly can move installation spare to bridge side end, and through the clamping of two clamping plates, can make installation spare can stably set up in bridge side end, at this time through limiting component can be fixed to the position of two clamping plates, thereby avoid installation spare to fall off, after can through single heavy vehicle and travel at different speeds and inspire bridge vibration, and through exciter subassembly vibration data collection, detection, thereby can detect the bearing capacity of bridge.

The application discloses a kind of metal pipe residual stress elimination method, system and device, method includes: S1 obtains residual stress data and judges high stress area;S2 is sequentially carried out local stress elimination processing to each high stress area, calculates local stress release rate until switching area after reaching standard;S3 carries out overall collaborative stress processing, applies stepwise hydraulic overload and synchronously applies adaptive rotary vibration;S4 real-time monitoring overall processing index, judge whether to meet three termination conditions;S5 pressure relief and low-temperature heat treatment are carried out.The system includes stress mapping module, local processing module, overall processing module, monitoring control module and post-processing module.The device includes clamping and rotating mechanism, hydraulic loading mechanism, exciter, excitation ring, distributed optical fiber sensor and controller.The application can identify high stress area one by one, and adaptively make processing parameters always match the real-time state of pipe, ensure that stress is uniformly released, and effectively eliminate pipe residual stress.

The utility model discloses a feeding device for assembling automobile door panel buckles, which comprises a vibrating disk and a vibration exciter, the discharge end of the vibrating disk is connected with a linear guide rail used for providing movement for buckle bodies, the linear guide rail is internally provided with a sliding chute for accommodating the buckle bodies along the length direction, and the vibration exciter is arranged in the sliding chute. The vibration exciter is arranged at the discharging position of the vibration disc and fixedly connected with the linear guide rail, and an adjusting assembly capable of inserting the end, away from the buckle part, of the buckle body into the sliding groove is arranged at the joint of the vibration disc and the linear guide rail. When the buckle runs to the joint of the vibration disc and the track, the adjusting piece can lift the buckle part of the buckle, and at the moment, the end, away from the buckle part, of the buckle is inserted into the sliding groove in the track, so that the buckle is in a vertical state.

The utility model discloses a coal flow unloading point anti-clogging device which comprises unloading baffles arranged on the two sides of a conveying belt, high-frequency vibration exciters are installed on the unloading baffles, and a coal flow height detection device is installed above the conveying belt. The device further comprises a controller, the signal output end of the coal flow height detection device is connected with the signal input end of the controller, and the signal output end of the controller is connected with the high-frequency vibration exciter. When clogging occurs on the conveying belt, materials on the conveying belt are heightened due to accumulation, and after the coal flow height detection device detects that the stacking height of the materials on the conveying belt reaches the upper limit, the controller starts the high-frequency vibration exciter to work, the materials on the conveying belt are dredged through high-frequency vibration of the high-frequency vibration exciter, extrusion of the materials can be prevented, and the conveying belt is prevented from being blocked. Friction between the conveying belt and materials is avoided, the service life of the conveying belt is prolonged, and normal operation of material conveying is guaranteed.

A clamping plate is arranged in a U shape, the clamping plate is erected on a shell of the vibration exciter and abuts against a supporting frame at any end of the vibration exciter, a U-shaped groove abuts against the circumference of the outer side of the vibration exciter, and pulling plates are symmetrically connected to the vertical ends of the left side and the right side of the end, away from the vibration exciter, of the clamping plate respectively. A through hole is formed in the position, corresponding to a rotating shaft of the vibration exciter, of the middle of the fixing plate, a nut is connected in the through hole, a lead screw is arranged in the nut, penetrates through the nut and is used in cooperation with the nut, the top end of the lead screw abuts against the rotating shaft of the vibration exciter, and the other end of the lead screw is connected with an adjusting hand wheel; the vibration exciter supporting frame is clamped by the clamping plate, the lead screw abuts against the vibration exciter rotating shaft, the rotating shaft and the bearing are ejected out from the other end by rotating the lead screw, the bearing can be easily and stably disassembled, time and labor are saved, and safety, reliability and efficiency are high.

The invention provides a device for researching metal particle motion by simulating on-off operation of a circuit breaker. The device comprises a simulated circuit breaker, an airflow generating device and a vibration exciter, the airflow generating device is fixedly arranged in an arc extinguish chamber of the simulation circuit breaker, and the vibration exciter is attached to the outer wall of the simulation circuit breaker and can change the position. The airflow generating device can provide different conditions of simulation breaker switch opening airflow for the arc extinguish chamber, the vibration exciter can simulate breaker switch operation vibration at different positions of the outer wall of the breaker, and a glass observation window is arranged at a preset position of the arc extinguish chamber and can observe and shoot the motion trail of metal particles in the arc extinguish chamber. According to the device, the airflow generating device and the vibration exciter are used for respectively and accurately simulating the airflow and vibration environment of the switching operation of the circuit breaker, and non-intrusive visual observation of the motion trail of metal particles is realized through shooting; the device is easy to operate, good in simulation effect and high in goodness of fit with the actual situation, and an effective means is provided for studying the motion behavior of the metal particles in the GIS equipment.

The application relates to the technical field of engineering construction, and particularly provides a silt solidification construction method using a geotextile tube and a slurry treatment system. The slurry treatment system using the geotextile tube comprises two stirring tanks, two valves, a dosing pump, a tubular liquid medicament mixer, a slurry pump, a slurry conveying pipeline, a plurality of geotextile tubes, a solidification site and a plurality of vibration and arrangement devices. The application can significantly accelerate the sedimentation speed of particles, promote the separation and flow of water, accelerate the process of sludge-water separation, ensure that water can quickly flow out, and can monitor and adjust the vibration force. When the vibration force is too large, the application can respond in time, effectively absorb the impact force caused by vibration, avoid structure loosening or displacement caused by vibration, and reduce the vibration force or frequency of the vibration exciter, so as to avoid excessive vibration, thereby causing silt particles to be resuspended, prolonging the sedimentation time and reducing the treatment efficiency.

1. The name of the design product: flange type exciter. 2. The use of the design product: used on vibrating equipment such as vibrating screen, vibrating hopper, etc. to provide exciting force. 3. The design points of the design product: in the perspective view 2. 4. The picture or photo that best indicates the design points: perspective view 2.

The invention relates to the technical field of material forming, in particular to a vibration control system and method for particle directional arrangement in the graphite powder forming process, and the system and method achieve the time division multiplexing of vibration excitation and ultrasonic detection through a multifunctional vibration exciter array, a high-speed switching circuit and intelligent closed-loop control. The micro-state of the powder is sensed in real time with high resolution, and a targeted, multi-mode and locally adjustable composite vibration waveform is dynamically generated and applied according to diagnosis. According to the vibration control system and the vibration control method, the problems of sensing blind areas, passive excitation and sensing excitation disjunction of existing graphite powder forming are solved or at least relieved, sensing excitation disjunction is effectively overcome, and the precision, the efficiency and the robustness of particle directional arrangement are improved.

The invention discloses a rolling bearing testing device, which comprises a base, and further comprises a driving mechanism arranged above the base and used for driving a bearing to rotate; the supporting mechanism is arranged on the base and used for supporting the driving mechanism; the detection assembly is arranged on one side of the driving mechanism and is used for cooperating with the driving mechanism to test a bearing arranged in the detection assembly; the device is provided with a heating mounting cylinder, a temperature sensor, a vibration exciter and other structures, the device has the effect of accurately simulating complex temperature and vibration working conditions, the heating mounting cylinder can accurately simulate the temperature and vibration working conditions through the number adjustment and distance control of heating rods on a moving plate, and the temperature and vibration working conditions can be accurately detected. The temperature in the open cylinder can be flexibly changed, and various environments from normal temperature to high temperature can be accurately reproduced in cooperation with real-time monitoring of a temperature sensor; the vibration exciter can output vibration of different frequencies and amplitudes through parameter adjustment, and high-frequency vibration scenes such as an automobile engine bearing and the like are simulated.

The utility model relates to the technical field of vibration tests, and particularly discloses an aeolian sand roadbed vibration wave excitation test device which comprises an excitation mechanism, a clamping mechanism and a data acquisition mechanism. The vibration excitation mechanism comprises a signal generator, a power amplifier and a vibration exciter; the clamping mechanism comprises a clamping plate, a bolt and a transverse plate. The data acquisition mechanism comprises an acceleration sensor, a dynamic data acquisition unit and a data processor. Through the arranged excitation mechanism, the excitation state of a train at different speeds and under different load conditions can be effectively simulated by adjusting the output frequency and excitation force, the damage condition of the aeolian sand improved soil under different excitation conditions can be accurately obtained, and the damage condition of the aeolian sand improved soil under different excitation conditions can be accurately detected through the arranged data collector. The dynamic response characteristics of the cement modified aeolian sand sample under the excitation condition can be effectively obtained, so that the internal change of the cement modified aeolian sand sample is judged.

The application discloses a vibration reduction and isolation device for a model tunnel in a centrifugal model test, which comprises a model box, the periphery and the bottom surface of the inside of the model box are paved with damping materials, the model box is filled with sand, an aluminum pile and the model tunnel are placed in the sand, the model tunnel is located on one side of the aluminum pile, a vibration exciter is in contact with the aluminum pile, the vibration exciter is fixedly connected with a movable rod, and a plurality of acceleration sensors are arranged at the aluminum pile, the sand and the model tunnel. According to the application, the structure is simple, the operability is strong, the result is intuitive, the cost is low, the vibration of the model tunnel in the centrifugal model test can be effectively reduced, and the vibration reduction and isolation measures in the tunnel with strict vibration requirements in the city can be guided.