51 results about "Impact loading" patented technology

The invention provides a dynamic strength test system and method for a soft rock biaxial Hopins compression bar, and the system comprises an axial impact loading unit which is used for generating an axial impact load; the confining pressure loading unit is used for applying radial confining pressure to the sample; the high-pressure fluid injection unit is used for injecting high-pressure fluid into the sample and simulating different internal water pressure and water saturation conditions; the data acquisition unit is used for recording impact load, confining pressure, internal water pressure and sample dynamic response data in real time; the control system is used for coordinately controlling the axial impact speed, the confining pressure and the internal water pressure value; by integrating the axial impact loading unit, the hydraulic servo confining pressure loading unit and the high-pressure fluid injection unit, a test platform capable of truly simulating a complex stress-seepage coupling environment where the deep soft rock is located is formed; therefore, the synchronous, independent and accurate control of axial dynamic load, constant or dynamic confining pressure and internal pore water pressure is realized.

The invention belongs to the technical field of impact fatigue tests of metal materials, and relates to an impact fatigue test system for simulating a working condition environment of a gun firing pin, which can perform high-frequency cyclic loading of 200MPa-500MPa, microsecond (mu s) level impact pulse and more than kilohertz (kHz), and synchronously simulate the working condition environment. High-energy, high-frequency and short-pulse impact loading under the gun and gun firing pin working condition is carried out through the high-frequency impact generation subsystem, and the dynamic mechanical environment in actual service is effectively simulated; the environment simulation subsystem is used for accurately controlling the temperature, the concentration and the pH value of media such as salt mist and seawater, and is synchronously coupled with mechanical shock, so that mechanical-electrochemical synergistic damage conditions are truly represented; dynamic stress, strain, electrochemical parameters and surface topography in the impact process are synchronously monitored through a multi-parameter synchronous acquisition subsystem, and complete data support is provided for researching the damage evolution law of a material under a complex load; the repeatability and the safety of the test are ensured through the modularized sample clamp subsystem and the dynamic sealing design.

The invention provides a coal body strain synchronous in-situ monitoring device and method based on true triaxial impact, and relates to the field of coal body dynamic testing and structural damage monitoring. Comprising a sample bearing module, an impact loading module, an internal fiber bragg grating dynamic strain monitoring module, a surface strain gauge monitoring module, a synchronous data acquisition module, a microscopic crack detection module and a macroscopic failure analysis module, the impact loading module is used for applying a transient impact load with a set impact speed to the gas-solid coupling coal sample, and the internal fiber bragg grating dynamic strain monitoring module is embedded with at least one fiber bragg grating sensing grating point along three mutually orthogonal directions of the gas-solid coupling coal sample respectively. The damage evolution mechanism of the gas-solid coupling coal body under the high strain rate condition is disclosed, and a means is provided for risk analysis of the rock burst-coal and gas outburst hybrid power disaster.

This invention provides a multi-field coupled shear testing device, including a test host, a pressure chamber, a power distribution cabinet, and a water supply device. The test host is supported by a workbench. The confining pressure chamber, together with the vertical, horizontal, and longitudinal loading systems, applies a three-dimensional static load. Within the horizontal loading system, an impact transmission rod connects to a nitrogen high-pressure emission chamber to achieve impact loading. The sealed high-temperature chamber has a vacuum glass window on the outside, and the internal shear box chassis is raised and equipped with water channels. A membrane is used to wrap the specimen to prevent leakage. The vertical loading system has a built-in cooling device, and an acoustic emission probe is installed on the pressure rod to monitor damage in real time. This device achieves multi-field coupling of high temperature, high pressure, seepage, and impact through modular design, offering high loading accuracy and convenient operation. It solves the functional conflicts and monitoring lag problems of traditional equipment and is suitable for multi-field mechanical property testing of geotechnical materials.

The invention belongs to the technical field of coal rock mechanical property testing, particularly relates to a mechanical testing device and method for coal rock loading, and solves the problems that an existing device is single in function, fragments splash, cleaning is inconvenient, and protection and cleaning are not linked. The device comprises a supporting mechanism, and a modular loading mechanism is detachably mounted on the supporting mechanism and comprises a static extrusion loading module and a dynamic impact loading module; the linkage type protection mechanism is provided with two protection half barrels, and fragments can be prevented from splashing when the two protection half barrels are closed; the sweeping mechanism is started when the protective half barrels are unfolded, a rotating ring drives a Z-shaped plate to rotate, an annular inclined panel is driven to vibrate, and fragments are swept; the device integrates a static extrusion function and a dynamic impact function, so that the equipment utilization rate and the application range are improved; protection and cleaning are linked, safety is guaranteed, cross contamination is avoided, and the experiment accuracy and efficiency are improved.

This utility model relates to the technical field of single-end mechanical seal structures. It provides a balance-free single-end mechanical seal structure suitable for high-pressure and high-temperature environments, comprising a stationary ring, a rotating ring, and a spring-loaded seat. The stationary and rotating rings slide tightly against each other at their opposite ends. The spring-loaded seat is pressed against the top of the rotating ring. The spring-loaded seat includes a rotating ring positioning ring and a locking ring. The rotating ring positioning ring is engaged with the lower end face of the rotating ring, and the locking ring is locked onto the shaft to be sealed and rotates with it. Elastic connecting elements are provided at four positions (front, back, left, and right) between the locking ring and the rotating ring. Four damping connecting pads are also provided between the locking ring and the rotating ring. The four damping connecting pads and the four elastic connecting elements are staggered around the center of the locking ring. This mechanical seal structure, through the organic combination of elastic connecting elements and damping connecting pads, not only improves the elastic compensation and sealing performance between the rotating and stationary rings but also effectively alleviates the impact load caused by sudden pressure changes or mechanical vibrations.

The utility model relates to a silver ingot weighing buffer device. According to the silver ingot weighing buffer device, electric push rods are arranged on the two sides of a weighing instrument, a lifting table is installed on the electric push rods, a window is formed in the middle of the lifting table and located over the weighing instrument, and connecting rods are installed on the inner sides of the four edges of the window in the middle of the lifting table; the bearing table is installed on the connecting rod and can slide on the connecting rod, the height of the bearing table is larger than the thickness of the lifting table, and when the electric push rod drives the lifting table to descend, the bearing table firstly makes contact with the weighing instrument. According to the scheme provided by the invention, the bearing table can be supported through the electric push rod, the lifting table and the connecting rod, the silver ingot and the bearing table are slowly descended to the weighing instrument through the electric push rod through vibration and impact force generated when the bearing table bears the silver ingot, and the lifting table, the connecting rod and the bearing table are separated to complete weighing; vibration and impact force generated when the silver ingot is placed are effectively isolated, and the problem that impact load directly acts on the sensor is solved.

The invention belongs to the technical field of pendulum bob tests, and particularly relates to a pendulum bob type lateral impact test device capable of adjusting the impact direction in multiple degrees of freedom, which comprises a base, a mechanical arm mounted on the base, a small arm fixedly mounted at the movable end of the mechanical arm, and a U-shaped frame fixedly arranged at the other end of the small arm, a U-shaped frame is arranged on the upper portion of the arc-shaped track, a chain wheel is rotationally installed in the U-shaped frame, a chain is connected to the chain wheel in a meshed mode, the lower end of the chain is fixedly connected with a pendulum bob, the other end of the chain is wound on a roller of a first winch, and the first winch is fixedly installed on the small arm. The azimuth angle and the pitch angle of the pendulum bob can be quickly and accurately adjusted, so that the pendulum bob can realize repeatable impact loading under different incident angles, different transverse offsets and different spatial orientations, and the target energy level hit rate and the test repeatability are remarkably improved.

The invention provides a biaxial impact loading test device for protrusion-impact composite dynamic disasters, and relates to the technical field of coal rock dynamic disaster tests. Comprising a sealing test cavity, multidirectional static loading devices, one-way impact loading devices, a lateral restraining device, a detachable side wall assembly, a pressure stabilizing type gas supply system and a mechanical driving mechanism, the sealing test cavity is used for loading a sample, and the multidirectional static loading devices are arranged in the X direction and the Z direction of the sealing test cavity respectively. Compared with an existing test device, the device has the advantages that coupling triggering of controllable unloading lateral constraint and impact loading is realized for the first time, so that a coal body failure mode and a gas release process are closer to actual mining conditions; and a high-fidelity and repeatable experiment platform is provided for revealing an inoculation and triggering mechanism of the outburst-impact hybrid dynamic disaster, establishing a risk evaluation index system and calibrating field monitoring and early warning parameters.

The invention provides a device for a composite material stringer skin interface out-of-plane soft body impact test, and relates to the technical field of impact tests, the device for the composite material stringer skin interface out-of-plane soft body impact test comprises an impact loading assembly, a fixed supporting assembly and a clamping assembly; the number of the clamping assemblies is two, and the two clamping assemblies are arranged on the fixed supporting assembly in the first direction in a spaced mode. The clamping assembly comprises a base, a rotating shaft, a lever, a spring and a clamping piece; the base is connected with the fixed supporting assembly. The rotating shaft is rotationally connected with the base and can rotate around the axis of the rotating shaft; one end of the lever sleeves the rotating shaft, and a spring is arranged between the other end of the lever and the base; the clamping piece is detachably connected with the rotating shaft so as to cooperatively clamp a test piece; the impact loading assembly is arranged above the clamping assembly, and the impact loading assembly can apply an out-of-plane impact load to the test piece. The out-of-plane impact loading test of a composite material stringer skin test piece can be realized, and the failure mechanism of a stringer skin interface in the process that a composite material fuselage bears an out-of-plane impact load is studied.

This invention relates to the field of functionally graded materials, specifically to a multidimensional gradient composite material structure and its design method for high-speed impact loading. The composite material structure includes a main body composed of multiple material gradients, a function-controlled outer edge slope, and a bottom high-density layer. By adjusting the side pressure distribution and enhancing the central pressure through the high-density layer, the deformation of the homogeneous material under high-speed loading is effectively reduced, with a maximum deformation ≤0.06mm, and the launch velocity is increased, with a central final velocity ≥13km / s. This invention is applicable to three-stage lightweight gas gun loading technology, providing high-precision data support for protective material research in aerospace and planetary science fields.

The invention discloses a horizontal flow sedimentation tank impact load mud level prediction method based on CFD simulation modeling, and the method comprises the steps: S1, configuring prediction basic parameters, and dividing a prediction scene; s2, collecting original data, calculating an impact load index after filtering and noise reduction, judging an impact level and generating a normalized input vector; s3, activating and matching an ANFIS grading rule base, and performing fuzzy reasoning to output initial mud position prediction distribution; s4, constructing a self-adaptive grid, executing CFD calculation in combination with an impact grade selective fluid mechanics model, and outputting high-precision mud level data; and S5, generating a dynamic correction factor, correcting the weight of the ANFIS rule and the CFD grid parameters, and outputting a mud position space-time distribution matrix according to a fusion result. The method improves the prediction precision and efficiency under the impact load, enhances the robustness, can support the operation control of the horizontal flow sedimentation tank, and reduces the operation and maintenance cost.

This invention discloses a design and manufacturing method for a uniform cross-section explosive load simulator based on gradient elastic metamaterials, relating to the field of impact loading. Addressing the problems of high cost per use and the susceptibility of variable cross-section elastic rods to local buckling instability under high-speed impact leading to waveform distortion in existing simulators, this invention, while maintaining the macroscopic uniform cross-section shape of the simulator, derives the ideal wave impedance gradient required to achieve the target explosive load based on the one-dimensional elastic wave propagation inverse design theory; establishes the mapping relationship between the relative density of a three-period minimal surface (TPMS) metamaterial unit cell and its equivalent mechanical parameters, and inversely solves the spatial relative density distribution function; extracts the waveform through dynamic impact finite element simulation, and introduces an impedance gradient correction factor to perform nonlinear iterative correction of the density function, obtaining a final three-dimensional metamaterial geometric model that accurately matches the waveform, and uses a flexible polymer material for additive manufacturing. This invention achieves the purely elastic, non-destructive, and reusable simulator, perfectly adapting to the stable firing of light gas cannons, and exhibiting excellent anti-instability capability and waveform fidelity under strong dynamic loads.

The application discloses a kind of one-dimensional force electric characteristics of concrete test piece and system, it is related to the cross field of detection and intelligent sensing technology of civil engineering material dynamic mechanical property.Testing method includes the following steps: S1: using one-dimensional Hopkinson pressure rod experimental device to the concrete test piece pre-embedded piezoelectric sensor is axially impacted loading, obtains incident wave signal, reflection wave signal and transmission wave signal;The current and voltage corresponding to the resistance obtained in parallel to the two ends of piezoelectric sensor;S2: obtaining the one-dimensional stress-strain curve of concrete test piece;S3: based on current and voltage, the charge amount generated by piezoelectric sensor is obtained;S4: the impact velocity of impact rod is changed and the stress-charge amount variation curve is obtained by repeating steps S1-S3.Getting the axial stress of concrete test piece and the charge amount output by piezoelectric sensor simultaneously, constructs stress-charge amount relationship curve, realizes the quantitative calibration of dynamic sensitivity.

The invention discloses a method and a device for modifying a sensitized metal active material through lossless impact. According to the method, accumulated dislocation and other defects are formed in the high-entropy alloy metal active material through pre-impact, stress concentration is generated, high-pressure and high-temperature hot spots are generated at the stress concentration position in the application process of the material, the hot spots induce the material to have a chemical reaction, and therefore the reaction threshold value of the high-entropy alloy metal active material is reduced. By designing the controllable pre-impact loading device, residual strain and structural damage caused by the fact that sparse waves and reflected waves are transmitted into a sample are avoided, and almost-nondestructive pre-impact modification is achieved.

The invention relates to the field of material dynamic performance evaluation, in particular to a device and a method for a material impact loading test, the device comprises a bearing table, a test platform, a laser speed measurement mechanism and an X-ray detection assembly, the laser speed measurement mechanism provides a high-sampling-rate speed signal through non-contact measurement, and the X-ray detection assembly is connected with the bearing table; the speed change process of the impact moment is accurately captured; the X-ray detection assembly is used for carrying out nondestructive detection on a test material by utilizing an X-ray in-situ detection technology, observing and analyzing change data of an internal structure of the material in real time by utilizing the penetrating power of high-energy X-rays, and carrying out real-time observation on the internal structure under the condition of not damaging a sample; the method provides more accurate measurement data; more accurate measurement data of the falling speed of the impact component are obtained, and time correlation analysis can be performed on the mechanical response of the test material and the X-ray image frame, so that a more accurate impact resistance detection result of the test material is obtained.

The invention relates to the technical field of roller bits, in particular to a novel roller bit with a buffer structure, which comprises a base body and at least one roller palm piece assembly, each roller palm piece assembly comprises a roller palm and a roller rotatably mounted on the roller palm, and the buffer structure is arranged between the base body and the roller palm. Through the buffer structure arranged between the base body and the bit leg, impact and vibration caused by stratum hardness change or cracks in the drilling process can be effectively absorbed and relieved through the buffer effect of elastic elements such as a spring, the instantaneous impact load on a bearing system and a movable sealing ring is remarkably reduced, and the service life of the bearing system is prolonged. Therefore, the reliability and the service life of the sealing system are greatly improved.

The invention discloses a time sequence damage enhanced fragment structure. The fragment structure comprises a high-strength energetic high-entropy alloy shell, a low-threshold active core body, a high-threshold active core body and a medium-threshold active core body. Through the structural design, the low-threshold active core body firstly reacts after penetrating through the protective structure target plate of the interval target plate, so that the high-strength energy-containing high-entropy alloy shell generates obvious transverse expansion, and fragments form scattered distribution of a center middle-threshold active core body space, a middle high-threshold active core body space and an external high-strength energy-containing high-entropy alloy shell space; and then large-area and saturated damage to the aftereffect target plate is achieved in sequence. According to the structure, detonation resistance, impact loading capacity, penetration capacity and energy release reaction capacity of fragments are considered, and the damage power to a spacer structure target is greatly improved.

The invention relates to the technical field of ice impact tests, and particularly discloses an ice impact loading test device, an impact control module respectively regulates and controls the falling height of a weight-adjustable impact body, a number-adjustable loading rod and an end structure of the loading rod through two control units, the impact body impacts the loading rod to make the loading rod axially contact an ice sample, and the loading rod is loaded into the ice sample. The sample circumferential boundary limiting module can enable the circumferential surface of the ice sample to be in a free or fixed state; the multi-dimensional data acquisition module respectively acquires stress change of a loading rod, acceleration signal change of an ice sample and a crack evolution time sequence image by utilizing a strain gauge, an acceleration sensor and a camera unit, and the quantitative output module calculates key parameters such as a dynamic stress-strain curve and a critical impact load of the ice sample according to the acquired data.

The invention discloses a method and system for measuring the temperature of a material in an impact loading state, and relates to the technical field of spectral temperature measurement. According to the method, shock waves are generated and act on a target body unit, so that the target body unit emits a radiation light signal; a material is integrated in the target body unit; collecting a radiation light signal, and converting the radiation light signal into an electric signal; based on the electric signals and constraint conditions, the temperature of the material is solved through a subtraction average optimizer algorithm; the constraint conditions comprise the minimum true temperature difference value of two adjacent channels of the radiation optical signal, the minimum square difference of N channels, the minimum difference between the average value of the true temperature of the front channel and the average value of the true temperature of the rear channel, and the minimum standard deviation of the temperature values of the channel 1 and the channel 2; n is the total number of channels in the radiation optical signal. According to the method, the measurement precision of the material temperature in the impact loading state is improved.

The invention discloses a light-gas gun perforated baffle device, and belongs to the technical field of experimental physics and launching devices. The device comprises a supporting and fixing assembly, a baffle with holes and a centering assembly. The supporting and fixing assembly is composed of a baffle fixing support and a baffle support and used for fixing the device in the light-gas gun impact bin. And a through hole is formed in the perforated baffle plate and is used for separating shots and intercepting experimental debris. The centering assembly comprises a centering stick and a centering stick cap and is used for ensuring that the through hole of the baffle is accurately aligned with the axis of the gun barrel. The device can effectively solve the problems that a traditional light-gas shell is difficult in bullet separation, unstable in energy release, potential in safety hazard and the like, has the advantages of being simple in structure, convenient to operate, high in reliability and the like, and can be widely applied to the field of impact loading experiments.

The present application has: a first impact absorbing member provided between a frame forming a skeleton of a vehicle and an outer side structure on an outer side of the frame in the vehicle, the first impact absorbing member being configured to deform preferentially to the frame in an impacted state in which the outer side structure is displaced or deformed toward the frame side due to an impact load on the outer side structure; a second impact absorbing member provided between the frame and the outer side structure; and a switching section capable of switching a provided state of the second impact absorbing member between: a first provided state in which the second impact absorbing member avoids the impact load in the impacted state, and a second provided state in which the second impact absorbing member deforms together with the first impact absorbing member while bearing the impact load in the impacted state.

The utility model discloses a pore water pressure testing device for a one-dimensional SHPB (split Hopkinson pressure bar) test of a discrete material. The pore water pressure testing device comprises an undrained boundary device and a pore water pressure gauge, a discrete material placing area is arranged in the middle of the undrained boundary device, the two ends of the undrained boundary device are oppositely connected with a shooting rod and a reflecting rod respectively, a radial threaded hole is formed in the side wall of the middle of the corresponding placing area, and a stainless steel filter screen is arranged at the bottom of the threaded hole; the pore water pressure gauge comprises a sensor shell, a conversion cylinder, a sensor pressure head and a cable, the cable is located at one end of the sensor shell and integrally connected with the sensor shell, the sensor pressure head is arranged at the other end of the sensor shell, the interior of the sensor pressure head is of an internal thread structure, the outer wall of the conversion cylinder is of an internal thread structure, and one end of the conversion cylinder is connected with the sensor pressure head in a matched mode. And the other end is matched and connected with the threaded hole to press the stainless steel filter screen on the discrete material. The one-dimensional impact loading device can be used for researching the mechanical property of a discrete material in a saturated state in a one-dimensional impact loading process.

The invention provides an electric energy meter metering method resistant to impact load interference, a medium and an electric energy meter. A high-precision harmonic electric energy metering scheme combining adaptive sampling, transient compensation and harmonic correction is adopted. According to the self-adaptive sampling, the loss of peak data can be effectively avoided by monitoring the current change rate in real time and dynamically adjusting a sampling frequency strategy. The transient compensation adopts a feedforward compensation algorithm for transformer saturation, and a distorted signal amplitude is reversely corrected based on a saturation characteristic curve of the transformer; and for response delay, based on an annular buffer, a sampling gap under high-frequency impact is filled through a linear interpolation algorithm, and a complete power peak curve is restored. According to the harmonic correction, the additional error caused by harmonic and power factor fluctuation can be effectively corrected through combination of FFT harmonic separation, window sliding and abnormal value elimination. Therefore, the electric energy metering accuracy of the electric energy meter in the unsteady state can be remarkably improved.

The invention discloses a while-drilling multi-parameter and sound-vibration response synchronous impact rock drilling test device and a method thereof, belongs to the technical field of rock drilling engineering tests, and solves the problem that an existing test device is difficult to truly and independently simulate a cooperative relationship of three actions of impact, propulsion and rotation in an actual rock drilling process. A multi-stage mechanical filtering chain of impact source-elastic energy storage-damping dissipation-inertia isolation-low-frequency servo is formed, high-frequency impact energy is effectively limited in a drill rod and rock sample area, impact disturbance is prevented from being transmitted into a propulsion servo system along a rigid path, and therefore effective decoupling of impact loading and propulsion loading is achieved on the structural level. Meanwhile, the rotary loading unit realizes physical decoupling with axial impact and propulsion load through an independent hollow rotating shaft structure, and the axial impact load and the propulsion load act on the drill rod and the rock sample through an independent axial force transmission path instead of being transmitted through a rotary transmission path.

The invention provides a control method for reducing coiling side guide clamping steel, and relates to the technical field of strip steel production, and the control method comprises the following steps: S1, a standby preparation stage: when an F1 rack completes loading, a coiling machine reaches a ready state, and meanwhile, a secondary system issues an initial width reference value; according to the control method for reducing coiling side guide steel blocking, through the setting of dynamic correction of the reference value, the side guide opening degree is made to be matched with the actual width of the head of the strip steel, the steel blocking occurrence rate is reduced by more than or equal to 80%, waste steel losses are reduced, through the matched design of the grading short stroke and the dual-mode control, the strip steel coiling center line deviation is made to be smaller than or equal to + / -0.5 mm, and the steel blocking rate is reduced. Therefore, the aim of improving the alignment degree between coiling layers is fulfilled, the damage to the edge part of the strip steel is reduced, and the phenomenon of impact load can be avoided when the equipment coils the strip steel through pressure feedback protection and speed hierarchical control, so that the aim of prolonging the service life of the side guide plate and the driving oil cylinder is fulfilled to a certain extent.

The invention provides a hot water force multi-field monitoring analysis method and system suitable for a TEHB test system, and the method comprises a model framework building step, a steady-state initial field solving step, a hot water force coupling solving step, and a multi-field response data collection and recording step. The invention further provides a hot water force multi-field monitoring and analyzing system suitable for the TEHB test system, a three-dimensional model containing the six-direction waveguide rod and the rock sample is established, a mechanical, seepage and temperature steady-state initial field before impact loading is obtained, hot water force coupling dynamic calculation is carried out under the action of triaxial six-direction synchronous impact, and the test result is obtained. And curves and statistical indexes of key results such as stress, fracture, pore pressure, temperature and the like are automatically output. According to the invention, the impact process simulation can be realized under the hot water-force coupling loading condition, and multi-field response data can be monitored and analyzed, so that the dynamic mechanical behavior of the rock under the hot water-force coupling effect can be revealed, and a basis is provided for the scientific design of deep engineering.

The invention discloses a symmetrical force balance type high-frequency impact device, and belongs to the technical field of mechanical performance testing. The device comprises a base, a test piece mounting table 2 located in the middle, a first impact assembly 3, a second impact assembly 4 and a control system, the two impact assemblies are driven by a linear driving unit 31, the axes are collinear, and actions are synchronous. During working, the impact hammers 33 on the two sides simultaneously accelerate to impact a test piece towards the center or simultaneously and reversely retreat. The symmetrical action enables counter-acting force generated by impact to be mutually counteracted in the system, and vibration interference to the base and the foundation is greatly reduced. The device is driven by a voice coil motor or a linear motor, can realize high-frequency and high-acceleration impact loading, is especially suitable for vibration fatigue and impact life tests of contact network parts, and has the advantages of compact structure, high test precision and good self-stability.

The invention relates to the technical field of building material detection, in particular to a multidirectional deviation test device based on building material bonding shear resistance analysis, which comprises a positioning bottom frame and a movable top frame movably sleeved in the positioning bottom frame, a cylinder I is jointly arranged between the movable top frame and the positioning bottom frame, and a rectangular sleeve frame is arranged at the front end of the movable top frame. A multi-dimensional impact structure is arranged in the sleeve frame and comprises a first double-shaft motor, a spiral rotating rod and a clamping frame, the first double-shaft motor is arranged at the center reference position in the movable top frame, the side impact function, the straight face impact function and the advanced local impact function are integrated, and synchronous or independent impact on the two side faces of a building material is achieved through the multi-dimensional impact structure; the front surface of the material layer is intermittently impacted by combining the magnetic acting force driving of the driving motor, the magnetic ring and the magnetic rod assembly, so that the multi-direction and multi-angle impact loading requirement under the complex working condition is met, and the technical bottleneck that a traditional device can only impact in one direction is solved.

The utility model relates to a shoe -pad, concretely is a kind of elastic warm shoe -pad, including upper pad body, middle pad body and lower pad body, elastic support part is installed on the lower pad body, the side of lower pad body is equipped with inflation port, inserts into inflation tube to elastic support part and fills gas into to the whole shoe -pad formation elastic support, the utility model inserts into inflation tube and fills gas inward by inflation port, gas will enter the inflation hole of the outermost gasbag by inflation port and enter the outermost gasbag, when the outermost gasbag is filled with gas, gas will enter other gasbag in turn by connecting hose, until other gasbag is filled with gas, at this time, the gasbag of full gas state can form elastic support to foot, and as long as gas of gasbag is not enough, it can fill gas inward at any time, can effectively reduce the impact load of lower limb joint, reduce fatigue feeling, wear more comfortable.