191 results about "Vibration attenuation" patented technology

The invention belongs to the technical field of blasting vibration prediction, and particularly discloses a blasting vibration speed attenuation law prediction method based on regression analysis, and the method comprises the steps: laying monitoring points in multiple directions around a blasting source, synchronously collecting the geological parameters and mass point peak vibration speed of each point, and constructing a segmented propagation path; a single dominant propagation section is identified based on adjacent monitoring point data, independent influence of specific geological conditions on vibration attenuation is quantified by combining single-factor control regression analysis, decoupling modeling of geological factors and attenuation behaviors is realized, and meanwhile, a double-factor dominant propagation section is identified on the basis of quantizing the independent influence of the single geological conditions. And deducting a known effect through residual analysis to separate out an independent contribution of another geological parameter, and finally integrating a multi-factor influence function to construct a comprehensive attenuation model. Progressive modeling from single-factor decoupling to multi-factor collaboration is achieved, and the precision and physical interpretability of blasting vibration prediction in a complex heterogeneous stratum are remarkably improved.

The invention provides a ballastless track joint performance degradation monitoring method and system, and relates to the technical field of track joint performance monitoring, and the method comprises the steps: knocking a ballastless track plate at a track joint through a force hammer to generate excitation, collecting a vertical vibration acceleration response signal through an acceleration sensor, and synchronously recording the knocking time and static parameters. The vertical vibration acceleration response signal is preprocessed, abnormal pulses and baseline drift are removed, a vibration event sample is formed, and joint mechanics characteristic parameters including a vibration frequency parameter reflecting rigidity degradation and a vibration attenuation parameter reflecting damping are extracted. According to the method, the joint performance evaluation index is calculated in combination with the static parameters, the degradation grade is evaluated after the evaluation index is compared with the preset threshold value, an early warning signal is triggered, the joint degradation grade and position information are provided, and monitoring and evaluation of the joint performance are achieved.

The invention relates to a site micro-vibration attenuation test measuring point determination method and system, belongs to the technical field of vibration test, and solves the problem that vibration test measuring point arrangement depends on vibration source load accuracy or artificial experience in the prior art. The method comprises the following steps: determining a basic measuring point based on a target site parameter, obtaining an actual measurement vibration response, and calculating an actual measurement response transfer ratio; establishing an initial finite element model of the target site, and applying a preset load to the initial finite element model to obtain an initial finite element calculation result; according to the basic measuring points, corresponding model calculation points and predicted vibration responses are extracted, and predicted response transfer ratios are calculated; and performing model parameter updating by using the actually measured response transfer ratio and the predicted response transfer ratio, obtaining a basic finite element model, generating a vibration transfer form curve, obtaining vibration transfer characteristics, and determining the number and the positions of the measuring points. The micro-vibration transmission characteristics are accurately determined without depending on the vibration source load, and the number and the positions of the vibration attenuation test points are reasonably formulated.

The invention discloses an aerodynamic damping rapid estimation method for a rotating blade, and the method comprises the steps: selecting a test impeller, obtaining an attenuation signal of a blade of the test impeller based on an impact test, and obtaining a structural damping ratio of the blade according to the attenuation signal through a free attenuation method and a nonlinear least square method; a BTT test technology is introduced, and the total damping ratio of the blade is obtained based on the BTT test technology and a nonlinear least square method; based on the structural damping ratio and the total damping ratio of the blade, an aerodynamic damping estimated value of the blade is obtained, and estimation of aerodynamic damping is achieved; according to the method, the BTT data analysis technology and the free vibration attenuation theory are combined, quantitative estimation of the aerodynamic damping ratio of the rotating blade is achieved, and the aerodynamic damping ratios of all the blades under different vibration pitch diameters can be determined; the pneumatic damping contribution of the rotating blade is quantitatively expressed, the vibration response mechanism of the blade in the service state can be deeply understood, and long-acting safe operation of a unit is guaranteed.

The invention discloses a directional traffic vibration attenuation method for a periodic pile-in-row composite foundation, and relates to the technical field of traffic vibration control and foundation treatment.The method comprises the specific steps that firstly, prefabricated modular pile bodies integrating various sensors and hydraulic adjusting assemblies are arranged at preset pile positions; continuously collecting various types of traffic vibration data; transmitting to a terminal for processing, and extracting a waveform category and a load dominant frequency parameter; according to the driving assembly, wave division type regulation and control are carried out, and pile row period parameters are dynamically optimized to form double matching; and finally finishing site construction deployment. According to the invention, traffic vibration data are comprehensively and accurately captured, and the problems of incomplete data acquisition, inaccurate waveform identification and the like in the prior art are solved; a double-matching mechanism is constructed, directional regulation and dynamic adjustment of piling parameters are performed according to different wave modes, the matching degree is made to reach 90% or above, automatic optimization and targeted attenuation of different types of traffic vibration can be achieved, the vibration attenuation effect is ensured to be stable and directional, and the limitation of the prior art is broken through.

The invention discloses an underground blasting safety assessment method and device based on the BIM technology and a medium, and relates to the technical field of underground engineering safety assessment, and the method comprises the steps: collecting blasting geological data, blasting design parameters and surrounding environment information of a blasting site, and constructing a blasting region BIM model; performing blasting vibration spectrum analysis on the blasting geological data and the blasting design parameters, extracting vibration spectrum data, integrating the vibration spectrum data into a blasting area BIM model, dynamically displaying a vibration attenuation field through a finite element analysis algorithm, and obtaining a vibration attenuation graph; performing three-dimensional modeling by analyzing a stress concentration area in the vibration attenuation map and the vibration spectrum data and combining geological information in the BIM model of the blasting area, predicting a fracture extension path in the blasting process, and identifying a high fracture propagation risk area; and potential risks in blasting operation are effectively reduced, and safety protection on personnel and the environment in the construction process is ensured.

The invention discloses an electromagnetic capture connecting mechanism with a spring flexible support, and relates to the technical field of electromagnetic capture. The device comprises a base, an inner cavity of the base is fixedly connected with a fixing assembly, the inner cavity of the base is fixedly connected with a flexible supporting assembly through the fixing assembly, the top of the flexible supporting assembly is fixedly connected with an electromagnetic coil, and the flexible supporting assembly comprises a mounting boss fixedly connected to the top of the base. According to the supporting structure, rigid supporting is changed into elastic deformable supporting, the stress of the end face of the electromagnetic coil and the supporting piece is effectively reduced, meanwhile, the damping spring and the electromagnetic coil are integrally designed, the buffering function is added while the electromagnetic performance is kept unchanged, the fatigue life of the supporting piece is prolonged, and the service life is prolonged. The magnetic core and the butt joint face are kept coaxial through the elastic buffering effect, force-displacement coupling energy absorption is achieved at the same time, mechanical impact at the electromagnetic capture moment is avoided, relative vibration attenuation in the butt joint process is accelerated, and capture precision is improved.

A solar heliostat with pneumatic flow guide load shedding and friction damping vibration attenuation functions comprises a main beam, a plurality of auxiliary beams perpendicularly fixed to the main beam, a connecting piece fixed to the main beam, a plurality of inclined struts connecting the connecting piece and the auxiliary beams and the like. The supporting rod is fixed to the main beam, the friction damper is installed at the tail end of the supporting rod, the steel cables are connected with the friction damper, the main beam and the auxiliary beam respectively, and the triangular-prism-shaped covering body wraps the inclined struts in an attached mode. The friction damper comprises a friction base body, a friction element connected with a steel cable, a pressing plate matched with a friction concave surface of the friction base body to clamp the friction element, a pressure adjusting structure A for adjusting the pressing force of the pressing plate, a guide roller for guiding the steel cable connected with the friction element, and a pressure adjusting structure B for adjusting the tension force of the connected steel cable, according to the invention, airflow separation is guided to reduce the wind load through the prism aerodynamic configuration on the back of the heliostat; the friction force of each friction element and the pre-tightening force of the connected steel cable are independently set, the outer rigidity of the heliostat surface is enhanced, wind disturbance vibration is reduced, and the service optical precision is improved.

The utility model discloses a vibration reduction component of clothes processing equipment and the clothes processing equipment. The vibration reduction component comprises a hanging rod and a damping component, the suspension rod is axially and movably arranged in the damping cavity in a penetrating manner; the damping structure is arranged on the suspender in the damping cavity in a sleeving manner; a certain distance is formed between one axial end of the damping cavity and the damping structure, so that after vibration exceeds a preset amplitude, the damping cavity abuts against the damping structure to start to generate damping force; the damping cavity is provided with air holes used for moisture removal. The ventilation holes are formed in the damping cavity of the variable-damping vibration attenuation component, the damping cavity can exhaust moisture outwards through the ventilation holes, moisture in the damping cavity can be avoided, and therefore the vibration attenuation component is prevented from being damaged or generating peculiar smells.

The application provides a design method of a broadband multi-modal vibration suppression damping material based on fractal geometry, comprising: constructing an initial geometric configuration of the damping material, the damping material being composed of a periodic arrangement of a three-dimensional unit cell structure in a plane; layering the unit cell structure to construct a parameterized model of the unit cell structure by using a fractal dimension of the unit cell structure and layer structure parameters; constructing a vibration impedance transfer equation according to the parameterized model of the unit cell structure, determining input impedances of the innermost layer and the outermost layer, and determining vibration attenuation amounts of the unit cell structure in multi-target frequency bands by using the input impedances of the innermost layer and the outermost layer; and optimizing the configuration and the parameterized model of the unit cell structure until the vibration attenuation amounts of the unit cell structure in the multi-target frequency bands meet load platform requirements. The broadband multi-modal vibration suppression damping material based on fractal geometry constructed can realize efficient dissipation of 10-1000 Hz broadband vibration energy and solve the frequency selectivity limitation of traditional homogeneous damping materials in multi-frequency vibration suppression.

The utility model relates to the technical field of neodymium-iron-boron magnet machining, and discloses neodymium-iron-boron grinding machining equipment which comprises a machining table, a moving assembly, a clamp assembly and a vibration reduction assembly. According to the neodymium-iron-boron grinding equipment, the first clamping plate and the second clamping plate are driven by the two-way screw rod to move synchronously, and a first flexible clamp and a second flexible clamp are combined, so that centering suspended clamping of a neodymium-iron-boron magnet is achieved, bottom surface contact is avoided, multi-surface grinding can be completed without repeated clamping, a worm and a worm wheel are matched and meshed, and the grinding efficiency is improved. Meanwhile, an air cylinder controls a limiting rack and a plane gear to be meshed or separated, a double-locking mechanism is formed, the anti-torque capacity is improved while the overturning precision is guaranteed, and a rubber damping block in an inner cavity of the machining table can absorb high-frequency grinding vibration; the stainless steel spiral spring arranged outside in a sleeving mode isolates vibration of low-frequency equipment, the rubber damping pad on the bottom face of the machining table is combined, the overall vibration attenuation rate can be increased, and the grinding quality is improved.

The application discloses a kind of partitioned blasting construction analysis methods for tunnel crossing cultural relic protection zone, it is related to blasting construction technical field, including establishing three-dimensional geological model and cultural relic three-dimensional model, the finite element modal analysis environment of cultural relic protection zone blasting construction is constructed;Under the finite element modal analysis environment of cultural relic protection zone blasting construction, the limit damage threshold of cultural relic and cultural relic dangerous node are determined by applying cultural relic resonance frequency, according to the limit damage threshold of cultural relic and cultural relic resonance frequency, the initial limit value of blasting vibration safety speed is calculated, and the blasting vibration safety speed correction limit value is obtained by correcting the initial limit value of blasting vibration safety speed according to the cultural relic vulnerability evaluation index calculated by the vulnerability influence data of cultural relic;According to the three-level risk area of cultural relic vulnerability evaluation index, the output is calculated by using the Sadovsky formula as the vibration attenuation model for the explosive quantity of buffer zone and safety zone.It is ensured that construction vibration is within the safety threshold, and the risk of cultural relic damage is reduced.

The invention discloses a low-wind-load and damping vibration attenuation solar disc-type condensation system which comprises a condenser, a double-shaft tracking device, a main beam, a liquid amount adjusting system, a plurality of steel cables and the like. The condenser is composed of a steel framework, a plurality of mirror surface units, a covering body, a plurality of liquid storage bags and the like, wherein the steel framework is composed of a plurality of radiation beams and cross rods which are arrayed circumferentially; the mirror surface units are fixed on the steel framework; the covering body wraps the steel framework on the back of the condenser to form a streamline aerodynamic shape so as to reduce wind load, and only the reflecting surface of the mirror surface unit bears wind pressure, so that the wind load is effectively reduced; the mirror surface unit adopts a light high-rigidity structure with a light supporting back frame and an embedded bearing framework, so that the deformation of a reflecting element under wind pressure is reduced; the double-shaft tracking device is installed on the back of the condenser and is close to a pneumatic center to reduce the wind moment load. The liquid level of the liquid storage bag and the liquid storage box which is installed on the main beam and can move is adjusted, self-adaptive liquid damping energy dissipation and vibration reduction of the light condensation system under the wind disturbance effect are achieved, and the service optical precision is improved.

The invention relates to the technical field of damping vibration attenuation, in particular to an asymmetric damping characteristic magnetorheological damper which comprises a cylinder barrel, a piston assembly, a piston rod and magnetorheological fluid filled in the cylinder barrel. The piston assembly comprises a piston head connected with the piston rod, an excitation winding arranged in the circumferential direction of the piston head, a lower pressing plate arranged at the end, away from the piston rod, of the piston head, an upper pressing plate arranged at the end, provided with the piston rod, of the piston head, and a baffle capable of axially moving between the piston head and the upper pressing plate. A damping channel is formed between the upper pressing plate and the lower pressing plate; and the baffle is arranged at the end part of the damping channel, slides on the piston rod, can axially move in response to the flowing direction of the fluid, partially blocks the damping channel and changes the effective flowing section of the fluid passing through the damping channel. The piston has the effect of reducing the occupation of the radial space of the piston head.

A fluid flow regulation assembly (1) includes: movable parts, for being actively mechanically driven, including at least one of a fluid flow regulating body for regulating a fluid flow and a rotor of a motor for driving the regulating body; and power electronics for controlling the motor. The movable parts and / or the power electronics are a source of vibration. Static parts are exposed to traveling vibrations originating from the source of vibration and include at least one of the group: a pump housing (3), a valve housing, a motor housing (5), a pump base and an electronics housing (7). The static parts include a structural element (11) with at least one vibration attenuation section (9) for attenuating vibrations: that originate from the source of vibration; travel along the structural element and have a vibration frequency above a pre-determined minimum vibration frequency (fmin).

The vibration reduction and isolation bearing supporting structure comprises a bearing mounting sleeve, a vibration reduction and isolation layer, a supporting fixing ring, a vibration suppression adjusting layer and a limiting strip. A plurality of groups of strip-shaped bosses are uniformly arranged on the peripheral wall of the bearing mounting sleeve at intervals, and a space groove is formed between every two adjacent strip-shaped bosses; each vibration reduction and isolation layer is fixed on one group of strip-shaped bosses; the inner circumferential wall of the supporting and fixing ring is fixed to the multiple vibration reduction and isolation layers. Each vibration suppression adjusting layer is arranged between one vibration reduction and isolation layer and the supporting and fixing ring; each limiting strip is arranged in one space groove, the outer end of each limiting strip is fixedly connected with the supporting and fixing ring, and the inner end of each limiting strip extends in the radial direction of the transmission shaft; the vibration reduction and isolation layer sequentially comprises an inner-layer low-frequency vibration reduction and isolation layer, a middle-layer medium-frequency vibration reduction and isolation layer and an outer-layer high-frequency vibration reduction and isolation layer from inside to outside in the radial direction of the transmission shaft. The radial vibration attenuation of the transmission shaft of the water surface ship can be effectively realized on the basis of keeping the overall structure stable.

A scroll compressor is provided with a resonance part (90) that attenuates vibrations of a predetermined frequency generated by a refrigerant gas compressed by a fixed scroll and an orbiting scroll. A center-side compression chamber (20A) communicating with a discharge port (21C) formed in an end plate of the fixed scroll is formed between a scroll-shaped wrap plate (21B) of the fixed scroll and a scroll-shaped wrap plate (22B) of the orbiting scroll, and a back-side compression chamber (20B) adjacent to the center-side compression chamber (20A) is formed between the back side of the scroll-shaped wrap plate (21B) and the ventral side of the scroll-shaped wrap plate (22B). A ventral compression chamber (20C) adjacent to the center-side compression chamber (20A) is formed between the ventral side of the scroll-shaped wrap plate (21B) and the rear side of the scroll-shaped wrap plate (22B), and in the resonance unit (90), refrigerant gas is guided from the ventral compression chamber (20C) in a state where the refrigerant gas compressed in the center-side compression chamber (20A) flows into the ventral compression chamber (20C) via the discharge port (21C).

The invention relates to the technical field of mixed loading explosive trucks, and discloses a five-stage telescopic arm and dynamic stability control coupling system of an on-site mixed loading explosive truck. The system comprises a high-precision sensing system, a dynamic modeling system, a coupling control system, a precise execution system and a safety monitoring system. The arm length, the gravity center position and the rotational inertia are calculated in real time through the time-varying parameter online identification module, the coupling control system executes feed-forward compensation, envelope calculation and gain scheduling at the same time based on the time-varying parameter online identification module, and the safety monitoring system calculates the safety operation range and triggers emergency arm falling when the range exceeds the limit. A multi-sensor data fusion and weighted Kalman filtering algorithm is adopted to realize accurate positioning and dynamic stability control of the five-stage telescopic arm under a complex working condition. The technical problems that in the prior art, due to flexible deformation, parameter time varying and external disturbance, the positioning precision is low, vibration suppression is poor, and the instability risk is high are solved, and the advantages that the tail end positioning error is smaller than or equal to 5 mm, the vibration attenuation rate is larger than or equal to 88%, and the control response lag is smaller than or equal to 50 ms are achieved.

The invention discloses a strip mine blasting vibration measurement point positioning method and system based on a three-dimensional model of a blasting area, and aims to solve the technical problems that traditional blasting vibration monitoring points are high in selection randomness and low in positioning precision, and the vibration attenuation rule of a complex blasting network cannot be accurately reflected. The method comprises the following steps: performing high-precision aerial survey and three-dimensional modeling on a blasting area by using an unmanned aerial vehicle, automatically searching an optimal vibration measurement point layout in a three-dimensional terrain model of the blasting area through a multi-target intelligent optimization algorithm in combination with blasting hole coordinates and a blasting time sequence, and realizing centimeter-level precision vibration measurement point field positioning through high-precision RTK equipment. According to the method, intelligent, high-precision and scientific vibration measurement point arrangement is realized, the scientificity and precision of vibration measurement point arrangement are improved, the method can adapt to various complex blasting networks such as row-by-row blasting and hole-by-hole blasting, and a reliable data basis is provided for blasting vibration attenuation law research.

The utility model relates to a novel stamping outer ring structure with vibration and noise reduction and a vibration and noise reduction needle roller bearing in the technical field of bearings, the vibration and noise reduction needle roller bearing is provided with the novel stamping outer ring structure, and the novel stamping outer ring structure comprises an outer ring body. The outer ring body is of a triangular-like structure, the triangular-like structure is provided with three elastic arc-shaped edges which are arched outwards and connected in pairs, and the connecting position of every two adjacent elastic arc-shaped edges is in arc transition. According to the novel bearing stamping outer ring structure with the vibration reduction and noise reduction functions and the vibration reduction and noise reduction needle bearing, an original circular stamping outer ring is changed into a triangle-like special-shaped structure, when a bearing is pressed into a shell hole, the three sections of elastic arc-shaped edges are in close fit with a shaft without gaps, vibration can be reduced, and therefore noise is further reduced.

The invention discloses an MEMS resonator and a manufacturing method thereof, and relates to the technical field of micro-electro-mechanical systems. The MEMS resonator comprises an upper electrode assembly, a lower electrode layer, a nitride layer, an upper oxide layer and a silicon-based layer. The upper oxide layer covers the upper surface of the silicon-based layer. The nitride layer covers the upper surface of the upper oxide layer. A lower electrode layer is deposited over the nitride layer. The upper electrode assembly comprises a vibration electrode. The vibration electrode comprises a vibration plate and a plurality of connecting columns. The lower surface of the vibration plate is planar, and the peripheral area of the upper surface of the vibration plate is in a convex curved surface shape. The connecting column connects the vibration plate and the lower electrode layer. During vibration, the edge of the upper surface of the vibration electrode is high in flow speed and low in pressure intensity, the lower surface of the vibration electrode is a plane, airflow is relatively slow, air pressure is relatively large relative to the upper surface, upward power is formed, one-time excitation can be obtained in each vibration cycle, vibration attenuation of a device is reduced, the Q value of the resonator is increased, and power consumption of the device is reduced.

Embodiments include an attenuation support to support or mitigate movement of an element, mainly a pipe of a pipeline, in which the movement comprises vibration and / or thermal expansion. The support can include damping elements, spacer elements, a housing housing the damping elements and the spacer elements, a rod extending through the housing, in which the damping elements and the spacer elements are intercalated with each other within the housing.The rod can be mounted with radial interference in relation to the damping elements. The damping elements can be hollow discs of elastomeric material, and the spacer elements can be hollow discs of rigid material. When thermal expansion movement of a pipe occurs, the rod moves in relation to the damping elements. When the dynamic movement occurs due to vibration of the pipe, friction between the rod and the damping elements deforms the latter, causing a hysteretic damping of the movement.

The utility model discloses a robot assembly gravity sensing device which comprises a bearing plate and a bottom plate, a reinforcing plate is fixedly installed at the bottom of the bearing plate, the reinforcing plate can be made of hard alloy, a damping pad is fixedly installed at the bottom of the reinforcing plate, a gravity sensor is fixedly installed at the bottom of the damping pad, and the gravity sensor is fixedly installed at the bottom of the damping pad. The outer surfaces of the damping pad and the gravity sensor are fixedly sleeved with an electromagnetic shielding layer, the outer surface of the electromagnetic shielding layer is fixedly sleeved with an anti-corrosion coating, the outer surface of the anti-corrosion coating is fixedly sleeved with a wear-resistant protection layer, and the outer surface of the wear-resistant protection layer is fixedly sleeved with a sealing shell. And the tops of the electromagnetic shielding layer, the anti-corrosion coating, the wear-resistant protective layer and the sealing shell are fixedly connected with the bottom of a reinforcing plate. According to the robot provided with the gravity sensing device, when a heavy object is placed on the top of the bearing plate, the gravity can be transmitted to the reinforcing plate, then the reinforcing plate can vertically transmit the load to the damping pad, and vibration attenuation is conducted through the damping pad.

The invention discloses a composite restraint layer damping vibration attenuation structure for a curved mirror, and belongs to the technical field of optical precision instruments. The structure comprises a curved lens, a viscoelastic material layer laid on the back surface of the curved lens, and a metal restraint sheet attached to the viscoelastic material layer. The core is that the metal constraint sheet has non-uniform rigidity and mass distribution in collaborative design. The cross section of the steel plate is a step-shaped outline formed by alternately connecting a plurality of web sections and wing plate sections, and preset rigidity gradient distribution in the specific direction is achieved by enabling the web sections to have the length changing in a gradient mode. And meanwhile, an opening array is integrally formed on each plate section forming the step-shaped outline, so that preset mass distribution is realized. Through collaborative design, the structure can be coupled with a plurality of high-frequency vibration modes such as bending and torsion of the lens, and energy is efficiently dissipated. According to the vehicle-mounted head-up display system, the problems of image dithering and blurring caused by lens vibration in the vehicle-mounted head-up display system are effectively solved through a lightweight and miniaturized structure.

This utility model discloses a handheld nut harvester with a cushioning function. The utility model includes a handheld part, a connecting rod, and a working part. The handheld part and the working part are connected by the connecting rod. A first cushioning mechanism for reducing impact force is provided on the connecting rod. The first cushioning mechanism is sleeved on the outside of the connecting rod, and a positioning ring is fixed inside the first cushioning mechanism on the connecting rod. The two ends of the first cushioning mechanism abut against the positioning ring via a first spring. This utility model can achieve dual cushioning for both the left and right hands. The dual cushioning structure significantly improves vibration attenuation, reduces the transmission of vibration to the user, provides better cushioning and shock absorption, improves operating comfort, reduces user fatigue, and further improves harvesting efficiency. Furthermore, the cushioning mechanism reduces the risk of wear and damage to various components caused by high-frequency impacts, extending the overall service life of the harvester.

The utility model relates to the technical field of industrial electronic equipment parts, and discloses an embedded anti-shaking handle which comprises a handle shell, a plurality of back plates are fixedly connected to the back of the handle shell, buffer assemblies are arranged on the side walls of the back plates, the buffer assemblies comprise a plurality of buffer frames, and the buffer frames are fixedly connected with the handle shell. The multiple buffering frames are arranged on the side walls of the back plates, damping rods are fixedly connected to the side walls of the back plates, the output ends of the damping rods are fixedly connected to the side walls of the buffering frames, fixing columns are arranged among the multiple back plates, and multiple sliding rings are slidably connected to the outer walls of the fixing columns. Side tables are arranged on the side walls of the sliding rings and the side walls of the buffer frames correspondingly, and rotating rods are rotationally connected between the multiple side tables. According to the utility model, the damping rod is linked with the spring and the slip ring to realize vibration attenuation and synchronously counteract multi-directional shaking, so that the steering torque is not affected by the damping force when a user actively operates, and the flexibility and accuracy of operation are kept while the external vibration is effectively isolated.

The utility model relates to the technical field of vehicle lamp cleaning, and provides a vehicle headlamp cleaning structure which comprises a bumper, a vehicle lamp, a cleaner and an ultrasonic vibrator. The vehicle lamp is positioned in the accommodating groove; the cleaning device is fixedly arranged on the bumper, and spraying holes are formed in the cleaning device and used for spraying a cleaning medium to the surface of the vehicle lamp; and the ultrasonic vibrator is fixedly arranged on the vehicle lamp. According to the automobile lamp cleaning device, the cleaning device and the ultrasonic vibrator are arranged, the ultrasonic vibrator is arranged on an automobile lamp, the automobile lamp is directly vibrated through the ultrasonic vibrator, vibration attenuation can be reduced, and the cleaning effect of the automobile lamp is improved; meanwhile, the ultrasonic vibrator is separated from the cleaning device, the overall occupied space of the cleaning device can be reduced, and reasonable distribution of the space of the vehicle body is facilitated.

The invention discloses a traffic load adaptive type periodic pile-in-row foundation vibration attenuation system, and relates to the technical field of foundation engineering and vibration control, the system comprises a traffic load adaptive type periodic pile-in-row foundation vibration attenuation system, which is characterized by comprising a parameter collaborative acquisition module for acquiring traffic load and site condition data to form a standardized data set; the integrated topological optimization module generates a row pile layout and section size optimization scheme; the non-uniform plane and variable cross-section vertical construction module completes precise construction; the closed-loop detection and adjustment module collects vibration data and adjusts a substandard area to form closed-loop control; traffic load and site data are integrated, pile arrangement and section are synchronously optimized through a topological algorithm, traditional limitation is broken through, deep adaptation is achieved, a whole-process closed-loop system is constructed, feasibility and safety are considered from data collection to detection and adjustment accurate control, the vibration reduction accuracy and the resource utilization rate are improved, and the method is suitable for large-scale popularization and application. And efficient and flexible technical support is provided for traffic scene foundation vibration control.

The invention discloses a ship-borne high-adaptability fishery catch multi-mode identification and intelligent sorting integrated device and an operation method thereof. The device comprises a fishery catch feeding module, a fishery catch detection module, a fishery catch sorting module and a control module which are connected in sequence. The catch feeding module is provided with a cleaning tank and a conveying belt with a single baffle, and the baffle is horizontally arranged; the catch detection module is integrated with a multi-sensor fusion recognition system and is combined with a pulse airflow cleaning device and a uniform distributor shifting piece to realize catch posture adjustment and high-precision recognition; the catches sorting module adopts an anti-winding spiral flow guide groove and a disc type sorting device, and soft sorting is achieved through control of an air cylinder capable of turning over a tray. The high-salt-mist and high-vibration environment is resisted, the vibration attenuation rate is larger than or equal to 85% in cooperation with a two-stage damping system, the problems that traditional equipment is low in efficiency, high in misjudgment rate and poor in multi-variety adaptability are solved, the operation cost is remarkably reduced, and the intelligent level of ocean fishery is improved.

The application provides a kind of variable pitch anti-vortex effect detection method, device and wind driven generator, the method comprises: the swing transient process of anti-vortex blade is carried out fluid dynamics simulation calculation, obtains its aerodynamic drag time series data in swing direction;Aerodynamic drag time series data is carried out multiple regression analysis, determines the interactive influence of blade root swing amplitude and incoming wind speed on the aerodynamic drag of anti-vortex blade, determines the aerodynamic drag mathematical model of anti-vortex blade;Aerodynamic drag mathematical model and the equivalent dynamic model of wind driven generator are coupled, to calculate the vibration attenuation of anti-vortex blade before and after joining aerodynamic drag, form vibration attenuation effect comparison chart.The application can effectively predict the variable pitch anti-vortex effect of wind driven generator by modeling the aerodynamic drag of anti-vortex blade and coupling calculation with the structural dynamic model of wind driven generator, which is lower in cost compared to field test and wind tunnel model test, but more accurate than engineering algorithm.