863 results about "Vibration transmission" patented technology

The invention discloses a motor coil winding device and method, and belongs to the technical field of motor manufacturing, the motor coil winding device comprises a winding machine body, the upper surface of the winding machine body is fixedly connected with a pair of supporting plates, and the outer surfaces of the supporting plates are provided with self-adaptive floating wire protection assemblies; a wire dynamic regulation and control assembly is installed on the upper surface of the winding machine body, a fixing piece is installed on the upper surface of the winding machine body, and a winding displacement quality sensing assembly is installed on the portion, close to the fixing piece, of the upper surface of the winding machine body. The magnetorheological fluid in the magnetorheological fluid damper rapidly changes the rheological property under the action of a real-time control magnetic field, vibration transmission is effectively restrained, the phenomenon that a wire is broken due to too large tension is avoided, when it is monitored that the tension is too small, the magnetic powder brake increases the resisting moment and slows down the rotating speed of the pay-off reel to improve the tension, and if the tension is too large, the magnetic powder brake stops working. The magnetic powder brake reduces the resistance moment and accelerates the pay-off, and ensures that the wire is always at the optimal traction angle.

According to the light and simple crawler-type vibration harvester suitable for the steep mountain land, the triangular crawler belt is adopted for driving, the contact area with the ground is increased, the climbing performance is improved, maneuverability, flexibility and reliability are high, flexible connection is formed through the elastic coupler, and vibration transmission is stable. The device comprises a vehicle body, a suspension platform and a vibration clamping mechanism, wherein the vehicle body comprises an H-shaped bottom formed by two longitudinal beams and a cross beam; triangular driving tracks are arranged at the rear ends of the longitudinal beams; auxiliary wheels are arranged at the front ends of the longitudinal beams; the suspension platform is located above the position between the front portions of the two longitudinal beams, the rear portion of the suspension platform is fixed to the sliding frame, and the sliding frame is arranged on the guide rods in an up-down sliding mode. The lifting driving device for driving the suspension platform or the sliding frame to lift up and down relative to the guide rod is connected with the suspension platform or the sliding frame; the vibration clamping mechanism used for clamping a tree trunk and conducting excitation vibration on the tree trunk is hung on the driving hanging platform through a flexible rope.

The invention discloses an assembly type efficient sound insulation cover convenient to install, and relates to the technical field of sound insulation covers. Comprising a plurality of pieces of main body square steel, the main body square steel are linearly and evenly distributed at equal intervals, jacking mechanisms used for improving the bottom supporting strength are arranged on the inner walls of the main body square steel correspondingly, and assembly type connecting mechanisms used for improving the connecting strength and stability are installed in the main body square steel correspondingly; according to the assembly type efficient sound insulation cover convenient to install, main body square steel is inserted and limited in a penetrating and inserting mode through the assembly type connecting mechanism, the defect that limiting performance is insufficient due to the fact that a lap joint mode is directly used in a traditional structure is overcome, the whole assembly process is simpler and more convenient, rubber pads and expansion water stop strips are arranged at splicing joints, and the assembly efficiency is improved. The vibration transmission of equipment can be blocked, the inherent frequency is kept away from the vibration frequency of the equipment, secondary noise caused by resonance is avoided, meanwhile, through gaps are reduced, the noise is prevented from leaking from the insertion hole position, and the problem of noise leakage is solved.

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.

A seal assembly (100) for an elevator (200) is disclosed. The seal assembly includes a covering structure (102). The covering structure covers a top portion of the elevator. The covering structure (102) comprises a plurality of pairs of U-shaped slots (102A) integrally formed along a peripheral portion of the covering structure (102), the plurality of pairs of U-shaped slots (102A) being arranged in mutually orthogonal orientations. Further, a plurality of U-shaped plates (104) are disposed along the peripheral portion and a plurality of seal moulds (106), each seal mould (106) is positioned in a respective region bounded by the peripheral portion and a lower surface of the covering structure (102), the pair of outer side walls (104A, 104B), and an elevator cabin (220) of the pneumatic vacuum elevator (200), thereby enhancing sealing performance and reducing vibration transmission to the elevator cabin.

The invention relates to the technical field of bridge structure engineering, in particular to a new and old bridge joint vibration disturbance control method, which comprises the following steps: S1, arranging a sensor at a new and old bridge joint, and collecting vibration data of the part; according to the method, a multi-source information identification model is constructed by fusing a physical mechanism and deep learning, robust identification of a vibration source and dynamic reconstruction of a transmission path are realized in combination with vibration transmission entropy and Granger causal test, an accurate basis is provided for subsequent vibration reduction scheme design, and an adaptive scheme is screened based on vibration characteristics, so that the accuracy of vibration reduction is improved. A four-dimensional coupling model is constructed through finite element simulation, an improved genetic algorithm is adopted to solve a Pareto optimal solution under the constraint of cooperative work performance of new and old bridges, parameters are selected according to engineering priorities, and cooperative optimization of the vibration reduction effect, structural safety, cost control and durability is achieved. Therefore, the accuracy and engineering applicability of vibration disturbance control at the joint of the new bridge and the old bridge are remarkably improved.

The invention belongs to the technical field of prefabricated part pouring, and particularly relates to a vibration platform for prefabricated part pouring. Comprising a conveying roller way, a material box, a vibration platform and a plurality of adjusting devices, the vibration platform is connected with a rack of the conveying roller way through an air spring, a rectangular through hole is formed in the top end of the vibration platform, the adjusting devices are arranged in the rectangular through hole and comprise hydraulic cylinders and U-shaped adjusting plates, and the hydraulic cylinders drive the U-shaped adjusting plates to adjust the height of the material box. Through cooperative control of the adjusting device driven by the hydraulic cylinder and the displacement sensor, automatic adjustment of the levelness of the material box is achieved. According to the structure, no matter what working condition is, the bottom face of the material box can be completely attached to the vibration transmission face of the vibration platform, and uniform and efficient vibration energy transmission is achieved. According to the vibration platform, the technical problems that an existing vibration platform inclines due to the nonlinear characteristic of a supporting device, and contact of the workbins is uneven are solved, it is guaranteed that pouring materials are even and dense, and the finished product quality of prefabricated parts is effectively improved.

The embodiment of the utility model provides an objective lens damping device which comprises an objective lens damper, a flexible hinge structure is adopted in the objective lens damper, and the flexible hinge structure provides elastic support when external vibration or temperature changes so as to buffer vibration transmission and reduce stress caused by a thermal expansion effect; the upper layer of the objective lens damper is an objective lens contact end; the lower layer is a frame contact end and is provided with an interface connected with a frame; the middle layer is of a flexible hinge structure, necessary flexible supporting is provided, and therefore vibration isolation and thermal stress buffering are achieved. According to the utility model, the objective lens damper is arranged between the objective lens and the frame, so that the objective lens and the frame are flexibly connected through the scalability of the flexible hinge instead of being rigidly connected through a screw, a better protection effect on the objective lens is achieved, and the designed objective lens damper belongs to passive vibration reduction, so that the service life of the objective lens damper is prolonged. Only through mechanical design, the vibration isolator is easy to achieve, and vibration isolation and thermal decoupling are well achieved.

The invention discloses a vibration plate type anti-scaling MVR evaporator, and relates to the technical field of MVR evaporators. Comprising a compressor, a heater, a separator, a circulating pump and a heat exchanger which are connected with one another, the side end face of the heat exchanger fixedly communicates with a cold side inlet pipe and a hot side inlet pipe, the cold side inlet pipe is located on one side of the hot side inlet pipe, and an L-shaped fixed plate is fixedly installed on the side end face of the heat exchanger and located on the outer side of the cold side inlet pipe; an intercepting assembly is arranged on the L-shaped fixed plate; a mounting fixed plate and a stabilizing transverse plate are fixedly mounted on the heat exchanger, an auxiliary assembly is arranged on the mounting fixed plate and the stabilizing transverse plate, and a vibration transmission plate is arranged on the auxiliary assembly. Through cooperative use of the interception assembly and the auxiliary assembly, the anti-scaling capacity of the MVR evaporator is effectively improved, the heat exchange efficiency is improved, the service life of equipment is prolonged, energy consumption is reduced, and the use effect of the MVR evaporator is greatly improved.

The invention discloses a longitudinal bending composite type six-degree-of-freedom piezoelectric active vibration isolation platform and a working method thereof. The vibration isolation platform adopts a modular structural design, a vibration isolation connecting platform and a base platform are sequentially arranged from top to bottom and are connected through four uniformly distributed vibration isolation modules, and each vibration isolation module forms a multi-stage vibration transmission structure through a fixed base, a transducer base, a piezoelectric transducer, an amplitude-change pole, a pre-tightening bolt and a small flexible hinge. The control module collects feedback signals of a first acceleration sensor arranged on the vibration isolation connecting platform and feedforward signals of a second acceleration sensor arranged on the base platform, and outputs 12-channel control signals to the piezoelectric transducers of the vibration isolation modules after signal processing. The piezoelectric transducer is driven to generate a composite motion mode of longitudinal vibration and multidirectional bending vibration, and active suppression of longitudinal vibration and radial bending vibration in any direction of a vibration isolation object is achieved. The device has the advantages of multi-degree-of-freedom vibration isolation, compact structure, lightweight design, independent control, high stability and the like, and has important application value in the fields of space reflecting mirrors, micro-nano manufacturing equipment vibration control and multi-degree-of-freedom vibration isolation systems.

The invention belongs to the technical field of building vibration isolation, and particularly relates to a vibration isolation construction method for an upper building of a subway tunnel. The method comprises the following steps that the form and size of a building foundation and the relative position of the building foundation and a tunnel are surveyed; according to the obtained vibration data, the vibration response characteristics of the building are analyzed, the main vibration frequency range and the vibration transmission path are determined, the influence degree of the existing vibration level on the safety of personnel, equipment and structures in the building is evaluated, and a targeted vibration isolation scheme is formulated according to the analysis and evaluation result; according to the formulated vibration isolation scheme, appropriate vibration isolation materials and equipment are purchased; a vibration isolation device is installed between the building foundation and the structure; after the vibration isolation device is installed, micro-vibration actual measurement is conducted on the building again, vibration data before and after the vibration isolation device is installed are compared, whether the vibration isolation effect reaches an expected target or not is evaluated, and if the vibration isolation effect is not ideal, reasons are analyzed, and a vibration isolation scheme is adjusted and optimized till the satisfactory vibration isolation effect is achieved. The invention provides a vibration isolation construction method for an upper building of a subway tunnel.

The invention provides a wheel center force extraction method, system and device for whole vehicle road noise simulation, and the method comprises the steps: building a vibration transmission relation between a wheel center excitation point and a steering knuckle response region based on a whole vehicle NVH finite element model, and determining frequency domain transmission data; collecting dynamic response signals of a plurality of steering knuckle response areas and road noise synchronization signals of a preset reference position in a time-sharing manner when the vehicle runs on an actual road surface, and performing phase alignment on frequency domain responses in different time periods according to the road noise synchronization signals to obtain a target frequency domain response matrix; determining a frequency domain excitation vector of the wheel center excitation point according to the frequency domain transmission data and the target frequency domain response matrix; and combining the frequency domain transmission data to reconstruct a theoretical response of a steering knuckle response region, and generating a target wheel center force. According to the method, the wheel center force suitable for high-frequency-band whole vehicle road noise simulation can be rapidly and accurately extracted with low cost on the premise of not depending on a high-cost sensor and a special test bench, so that optimization design of NVH (Noise Vibration and Harshness) performance of a new energy vehicle is supported.

The application provides a double-station worktable for CNC, and particularly relates to the technical field of CNC machine tool auxiliary equipment, and comprises a CNC main body, an inner platform and a tool head unit, and further comprises a double-shaft switching mechanism arranged between the outer side of the CNC main body and the inner platform, wherein the double-station worktable for CNC; the double-shaft switching mechanism composed of an X-axis displacement component, a Y-axis displacement component and a sinking fastening component is arranged, so as to solve the defects of the existing technology, such as the jamming misplacement caused by the single guide rail alignment of the multi-station switching, the lack of special connection structure, the non-separation of the carrier and the guide rail during the processing, the vibration transmission affecting the precision, and the like, to realize the cooperative action of the X-direction bearing movement of the jig table, the Y-direction smooth connection and the locking of the processing position sinking, and the double-station switching does not need complex debugging, so that the equipment downtime is greatly reduced, and the processing precision and stability are ensured.

The invention relates to the technical field of load motion platform control, in particular to a vibration control method and device of a load motion platform, equipment and a storage medium. The method comprises the following steps: collecting state parameters of a load motion platform to obtain a multi-dimensional state parameter set, and executing parameter fusion processing to obtain a fusion state vector; updating the model parameter set according to the fusion state vector, and obtaining predicted deformation based on the fusion state vector and the elastic deformation parameter; determining a load change trend in combination with historical load data and the fusion state vector, and determining an optimization curve parameter in combination with a load characteristic parameter; generating a first acceleration and deceleration curve in combination with the basic curve parameter and the optimized curve parameter; determining a speed correction amount according to the predicted deformation amount, superposing the speed correction amount to the first acceleration and deceleration curve, and rejecting a target resonant frequency component through a vibration transmission parameter to generate a second acceleration and deceleration curve; and generating a motion optimization instruction based on the second acceleration and deceleration curve to execute motion control. The platform control stability can be improved.

The utility model discloses a damping bearing seat assembly, including bearing body, bearing sleeve frame and bearing seat, bearing body is fixed in bearing sleeve frame, the bottom end of bearing sleeve frame is fixed connection with mounting plate, threaded rod passes through the through-hole on mounting plate and then is threaded connection with threaded groove, the bottom end of mounting plate is fixed connection with the flashboard, and the flashboard is fixed on the bearing sleeve frame. The two sides of the insertion plate are fixedly connected with external damping layers, and the insertion plate is inserted into an insertion groove in the bearing seat. According to the vibration reduction bearing seat assembly, when the bearing body operates and vibrates, the mounting plate is fixedly mounted in the butt joint groove to achieve the primary rigid vibration reduction effect, meanwhile, the bearing body and the bearing sleeve frame transmit vibration to the inserting plate, internal friction is generated between the external damping layer on the outer side of the inserting plate and the internal damping layer on the partition plate, and the vibration reduction effect is achieved. Vibration energy is converted into heat energy through internal friction between the external damping layer and the internal damping layer, and the vibration reduction effect is achieved.

The invention discloses an intelligent vibration sensor layout method based on cooperation of physical field modeling and hybrid optimization. The method comprises the steps that a geometric model of a target mechanical structure is acquired, and a material parameter set is extracted; the curvature and stress of the surface of the mechanical structure are calculated, and a high-sensitivity area is recognized in combination with a vibration transmission efficiency matrix; curvature self-adaptive sampling is executed in the high-sensitivity area, a candidate point set is generated based on an improved greedy algorithm, and redundant candidate points are eliminated to obtain an effective candidate point set; calculating coverage weights of the effective candidate points; adding the candidate point with the maximum coverage weight selected through bubble sorting into a sensor set, and calculating the total coverage rate once when each effective candidate point is added until the coverage rate reaches a preset value; performing global optimization based on a simulated annealing algorithm, and performing crossover and mutation operation on the selected sensor individuals; calculating the contribution degree of each sensor, and removing low-efficiency sensors until the maximum iteration value is reached. According to the invention, efficient calculation and resource configuration optimization are realized.

The invention discloses a manufacturing mold and a manufacturing method of a cast-in-place decorative concrete product, and belongs to the technical field of building construction. The supporting base plates are detachably installed on the base, the supporting base plates and the supporting face are subjected to die assembly to form a forming cavity with an opening in the top, and installation grooves are formed in the inner surfaces of the supporting base plates in an array mode; the multiple vibrators are embedded into the corresponding mounting grooves correspondingly, and all the vibrators are electrically connected with a controller arranged on the outer side of the forming cavity; the multiple vibration transmission plates correspondingly cover the inner surfaces of the supporting base plates respectively and abut against the output ends of the vibrators; the multiple forming panels correspondingly and detachably cover the sides, away from the supporting base plate, of the vibration transmission plates, and texture structures are prefabricated on the inner surfaces of the forming panels; the two adjacent forming panels are connected in a sealed mode, and the forming quality of the cast-in-place decorative concrete product can be effectively guaranteed.

The invention relates to the technical field of engine component assembling equipment, in particular to automatic valve collet assembling equipment which comprises a rack, a valve collet assembling device, a valve collet assembling device and a valve collet assembling device, and the rack is provided with an assembling position, an assembling position and a taking position; the first vibration transmission track is connected with the rack, a first profiling channel is formed in the first vibration transmission track, and the central axis of the locking and clamping groove is kept vertical when moving towards the assembling position in the first profiling channel; the swing table is connected with the rack; the material transferring unit is connected with the rack and used for achieving sequential movement of materials among the splicing position, the assembling position, the taking position and the valve spring seat port. The press-in unit is connected with the rack and used for pressing a lock clamp groove which is located at the port of the valve spring seat and provided with a valve lock clamp into the valve spring seat; the valve collet assembling device has the effects that the influence of artificial factors on the valve collet assembling production efficiency is reduced, and the overall quality of valve collet assembling is guaranteed.

The invention belongs to the technical field of naval vessel vibration noise, and discloses a rapid calculation method suitable for vibration transmission of a propulsion shafting with any complex section of a naval vessel, which can be used for rapidly modeling the propulsion shafting and rapidly forecasting a vibration transmission calculation result by using the Timoshenko theory and the thought of superposing the thought of multi-section division of the propulsion shaft. According to the method, the characteristics of short propulsion shaft, complex multi-section, variable bearing supporting rigidity, bearing coating and the like are considered, and compared with a current general propulsion shaft system modeling and vibration transmission calculation method, the modeling and calculation efficiency is high, the method is simple and easy to implement, the time cost is low, and the method better conforms to the actual propulsion shaft system condition.

The propeller elastic mounting device comprises a mounting base, a damping groove is formed in the mounting base, a buffer plate is movably connected to the interior of the damping groove through a damping mechanism, and a rotating disc is rotationally connected to the top of the buffer plate through a rotating assembly; a primary fixing structure is formed by the first threaded sleeve, the second threaded sleeve and the positioning nut, a secondary reinforcing structure is formed by the locking ring, the fastening bolt, the clamping plate and the fastening nut, and firm installation of the propeller body is jointly achieved; the motor, the worm, the worm gear and the rotating shaft form a rotation adjusting structure, and accurate adjustment and stable positioning in the propelling direction are achieved. The sliding rod, the connecting base, the connecting rod, the damping shock absorption spring, the guide groove, the guide rod, the guide plate and the rubber elastic body form a composite shock absorption structure, vibration energy is absorbed and attenuated, vibration transmission is reduced, and finally the effects that the propeller is stable in installation, flexible in steering and small in vibration influence are achieved.

The invention discloses a damping element optimization method based on transmission path analysis, which comprises the following steps: S1, establishing a multi-layer transmission path analysis model, and calculating a final transmissibility matrix T'of each path point in the multi-layer transmission path analysis model under a target point vibration contribution analysis peak frequency; s2, calculating a comprehensive contribution degree Di of each path point in the multilayer transmission path analysis model under a target point vibration contribution analysis peak frequency, and extracting a corresponding key transmission path point through the comprehensive contribution degree Di; s3, the damping elements of the key transmission path points obtained in the S2 are optimized, and an optimization result is obtained; according to the method, a multi-layer transmission path analysis model is constructed, the vibration contribution amount of each transmission path in each layer of transmission path model at the maximum peak value and in the whole frequency band is calculated, and finally, through comparison of typical working condition data, a key vibration transmission path with relatively large contribution to the vibration of the driving motor is identified. Therefore, the possibility of optimizing the suspension in the design stage is provided.

The invention discloses a train running gear bearing state prediction and early warning method and system, and the method comprises the steps: synchronously collecting vibration, noise and temperature data, and building a standard vibration reference based on rotation period segmentation; extracting a component characteristic frequency and confirming fault information by adopting a frequency spectrum decomposition and intermodulation analysis technology, and determining a monitoring working frequency and a component weight table; a temperature confrontation processing mechanism is introduced, decoupling parameters are generated through a heat distribution matrix and directional heat flow analysis, and accurate separation of temperature influence and mechanical wear signals is achieved; constructing an equivalent transformation matrix based on a noise dependency relationship, and performing standardized transformation on pure vibration data to generate a comparable state index; through abrasion tracking and vibration transmission analysis, path reconstruction is carried out in combination with transfer parameters, and accurate positioning and evolution prediction of faults are achieved; and finally, dynamically adjusting the component weight based on the path control signal, establishing a four-level grading early warning system, and realizing real-time monitoring and intelligent early warning of the running state of the bearing.

The invention relates to the technical field of rail traffic, in particular to a rail traffic steel rail vibration and noise reduction device which comprises a steel rail section, the left side and the right side of the steel rail section are both fixedly connected with vibration reduction mechanisms, and the tops of the two vibration reduction mechanisms are both movably connected with noise reduction mechanisms. The efficient and stable rail transit steel rail vibration and noise reduction function is achieved, when a vehicle passes through the vibration reduction mechanism and the noise reduction mechanism, vibration and noise generated by the vehicle can be effectively absorbed and buffered, a spring assembly in the vibration reduction mechanism elastically deforms under the pressure of the vehicle, vibration energy is converted into elastic potential energy, and the vibration reduction mechanism is arranged on the vibration reduction mechanism. Excessive transmission of vibration is avoided; and parts such as a rubber pressing plate and a second spring in the noise reduction mechanism preliminarily buffer the pressure of the vehicle and reduce noise through self deformation and elastic recovery when the vehicle passes by, and meanwhile, the stability of the whole device is greatly improved through the linkage design of all the parts.

The invention discloses a quasi-zero stiffness sound array vibration isolation device for an unmanned aerial vehicle. The quasi-zero stiffness sound array vibration isolation device comprises a positive stiffness component and a negative stiffness component. The positive stiffness component is a steel spring, the upper end is connected with the unmanned aerial vehicle connecting piece, and the lower end is connected with the negative stiffness component; the negative stiffness component comprises a cylindrical permanent magnet and an annular permanent magnet, the cylindrical permanent magnet is located in an annular space of the annular permanent magnet after the acoustic array is mounted, and the cylindrical permanent magnet and the annular permanent magnet are in a mutual exclusion state; the steel spring, the cylindrical permanent magnet and the annular permanent magnet jointly form a quasi-zero-stiffness structure, and the quasi-zero-stiffness structure is located at a static balance position under the gravity effect of the sound array and stores elastic potential energy. When the unmanned aerial vehicle is disturbed by vibration transmitted by the unmanned aerial vehicle, the negative stiffness component releases elastic potential energy and generates acting force opposite to the disturbance direction so as to counteract vibration transmission. The device has the advantages of simple structure, suppression of vibration of the unmanned aerial vehicle and transmission of aerodynamic noise to a sound array, and the like.

The invention relates to the technical field of tail gas treatment, in particular to a tail gas treatment structure of a movable diesel generating set. Comprising a supporting seat and further comprises a cyclone separator, a first barrel, a flow guide part, a second barrel, a third barrel, a vibration part, a driving part and the like. Through cooperative cooperation of the cyclone separator, the impingement plate, the flow guide part, the vibration part and the driving part, in the tail gas treatment process, the cyclone separator separates and collects large particles, the impingement plate enables airflow to uniformly enter DOC for oxidation, the flow guide part sweeps high-temperature gas to the end face of the DPF to form uniform heating, and the tail gas treatment effect is improved. The vibration part transmits vibration to the DPF through the vibration transmission rod so that a soot layer can be loosened, and the driving part drives the flow guide part to rotate and the vibration part to work at the same time. Therefore, the problems that in the prior art, an ash-carbon composite layer formed by ash accumulation hinders regeneration heat transfer, and a soot layer is compacted compactly under the low-load working condition, so that regeneration starting is difficult, and heat spreading is slow are systematically solved.

The application provides an aircraft, comprising a fuselage, a bumper, a connecting mechanism and a landing gear, the cylinder body of the bumper is assembled to the fuselage; the connecting mechanism is hinged to the movable rod of the bumper and the fuselage; and the landing gear is foldably connected to the connecting mechanism. In this way, when the landing gear vibrates, the landing gear can transmit the vibration to the connecting mechanism to drive the connecting mechanism to rotate relative to the fuselage, and then drive the movable rod to slide in the cylinder body to achieve the effect of energy absorption and vibration reduction through the bumper. In addition, compared with the technical solution in the prior art that the bumper is synchronously folded with the landing gear, the aircraft provided by the embodiment of the application does not need to consider the influence of the weight of the bumper on the folding of the landing gear, the weight of the folding part is reduced, and no folding space needs to be reserved for the bumper after the landing gear is folded, which helps to reduce the volume of the aircraft.

The utility model discloses a shock absorption and noise reduction composite structure device for an elevator car, which belongs to the technical field of mechanical engineering and acoustic engineering, and comprises a car body, the inner side of the car body is movably connected with a shock absorption mechanism, and the outer side of the shock absorption mechanism is movably connected with a noise reduction component. The shock absorption plates which are supported by the array telescopic supporting columns and are rotationally connected with the inner walls of the shock absorption plates are arranged on the four sides of the interior of the lift car body, and multiple sets of array shearing distribution telescopic rods are rotationally connected with the inner walls of the shock absorption plates. The stress damping plate moves to enable the array telescopic supporting columns to contract and store energy, the telescopic rods shear, expand and press downwards to drive the component force blocks to slide and press the compression springs to store energy, and impact force is unidirectionally decomposed into elastic potential energy and mechanical work. The problems that due to the fact that a traditional damping structure is arranged on the outer side of a lifting or connecting structure, vertical inertial impact, load sudden change, horizontal shaking and steel wire rope vibration conduction coverage are insufficient in the lift car body are solved, and effective buffering of the interior of the lift car body is achieved.

The application relates to the technical field of railway vehicle detection, and discloses a bearing vibration detection and identification method based on an octave and a voting mechanism, which is characterized in that bearing detection of passing vehicles is completed through a bearing running-in test platform arranged on a railway site to form actual detection data; the bearing running-in test platform comprises a contact part used for directly contacting an outer ring of a measured bearing, an acceleration sensor and a microphone are arranged on the contact part; vibration acceleration data is formed through acceleration sensor detection of bearing vibration; sound pressure level data is formed through microphone detection of bearing vibration; and the vibration acceleration data and the sound pressure level data together form vibration transmission data. The application can more accurately complete bearing vibration detection and identification and can be applied to actual railway vehicle detection and identification.

The utility model discloses a kind of car sunroof guide rails with buffering noise reduction structure, it is related to sunroof guide rail field, this kind of car sunroof guide rail with buffering noise reduction structure includes the guide rail main body extending along first direction, outwardly extending mounting plate is formed on the guide rail main body one side outer wall, multiple mounting holes are opened on mounting plate, for bolt connection frame, bolt is passed in mounting hole when connecting;This kind of car sunroof guide rail with buffering noise reduction structure forms three-dimensional grid structure by buffer groove and extension groove, main rubber pad absorbs vertical impact, extension rubber pad inhibits longitudinal vibration, double elastic deformation greatly reduces the area of mounting plate contact part after installation with frame, blocks vibration transmission path, rubber ring in the protruding part groove isolates bolt and mounting plate metal contact, eliminates high-frequency friction abnormal sound.

The utility model relates to the technical field of geotechnical engineering and railway construction, and particularly discloses a vibration reduction and deformation resistance steel sheet pile for deep foundation pit engineering close to an existing railway line, which comprises a steel sheet pile, a vertical load-bearing steel bar, a connecting component, a vibration isolation and reduction interlayer and a protective steel plate. By adopting a composite structure form of steel sheet piles, vibration isolation and reduction interlayers and vertical load-bearing steel bars, the structure reinforcing function and the vibration isolation function are organically combined, and a brand-new supporting structure system is formed; the vertical stressed steel bars are matched with the vibration isolation and reduction interlayer and the damping spring shock absorbers, the vertical stressed steel bars mainly share tensile stress to improve the stress state, the vibration isolation and reduction interlayer mainly absorbs vibration energy to weaken vibration transmission, and the comprehensive performance of the steel sheet pile is remarkably improved through the combined action of the vibration isolation and reduction interlayer and the damping spring shock absorbers; meanwhile, according to the scheme, by optimizing arrangement of the vertical load-bearing steel bars, selection of vibration isolation and reduction materials and arrangement of connecting components, the whole structure has the good reinforcing effect and vibration reduction performance, and construction convenience and economical efficiency are taken into consideration.