1347results about "Material strength using single impulsive force" patented technology

The invention provides an analysis method and system for dynamic fracture of a quasi-brittle material. The method is used for solving the technical problem that an existing method is insufficient in dynamic fracture capturing capacity in quasi-brittle materials. The method comprises the following steps: constructing a representative volume element RVE of a quasi-brittle material with two embedded fracture planes; a dual-scale model of the RVE is constructed, the dual-scale model comprises a macroscale sub-model and a mesoscale sub-model, and the crack traction force and the displacement jump increment in the mesoscale sub-model meet the rate-dependent cohesive friction law; identifying the parameters of the dual-scale model; and embedding the dual-scale model into finite element software to simulate the dynamic fracture of the quasi-brittle material. The contained mesoscale crack plane has the key characteristics of the dynamic fracture behavior of the quasi-brittle material, and has remarkable advantages compared with a classical empirical model.

The invention discloses a multi-linkage combined load synchronous application strength testing device. The technical problems that in the prior art, the load applying mode is single, and the combined load cannot be synchronously applied are solved. The device comprises a connecting mechanism and a load applying mechanism, wherein the load applying mechanism comprises a torsional load applying structure, a load transmitting structure and a multi-linkage testing structure. The load transmission structure comprises a special-shaped stress plate and a torsional load transmission assembly, and the torsional load transmission assembly comprises a connecting chuck and a torque plug-in. By controlling the rotation of the torsion load transmission assembly, a pure torsion load applying mode or a conversion mode of converting torsion motion into radial load can be selectively realized, and multi-directional load detection is realized. The invention further provides a combined load synchronous applying function, the single driving source synchronously activates the torsion load path and the radial load path by adjusting the geometric positions of the torque plug-in and the load adjusting plate on the connecting chuck, and synchronous applying of the torsion load and the radial load is achieved.

The invention relates to the technical field of glass detection, in particular to a glass ceramic panel mechanical impact resistance testing system which comprises a base body, an impact head, a connecting piece, an elastic piece and a first piston. The base body is provided with a medium cavity, an impact cavity and a containing cavity. The impact cavity is communicated with the medium cavity and penetrates to the surface of the base body. The medium cavity and the impact cavity are arranged at intervals with the containing cavity. The first piston is in sliding fit with the medium cavity. The connecting piece is in sliding fit with the impact cavity. The side wall of the impact cavity is provided with a first flow channel and a second flow channel. The first flow channel is communicated with the medium cavity, and the second flow channel is communicated with the containing cavity. The connecting piece is provided with a connecting flow channel. The medium cavity is used for containing a liquid medium. The elastic piece is connected between the first piston and the connecting piece in an abutting mode. The impact head is mounted at one end of the connector away from the medium cavity. The device can more accurately simulate the condition of mechanical impact on the glass ceramic panel in the actual use process, and can accurately screen the glass ceramic panel suitable for an induction cooker product.

The invention provides a method for obtaining the optimal low-temperature impact toughness and a welded body, and the method comprises the following steps: S1, obtaining chemical components of sample steel, and calculating the cooling rate corresponding to the bainite phase change curve nose tip temperature of the sample steel; s2, the cooling rate serves as the key cooling rate of the welding heat cycle process, and the corresponding welding heat input amount is calculated; s3, cutting a plurality of cuboid thermal simulation initial samples of which the length directions are parallel to the rolling direction of the steel plate from the sample steel; s4, two-pass welding thermal simulation cycle experiments at different temperatures are set; s5, two thermocouples are welded to the center of the cuboid thermal simulation initial sample for temperature measurement, and a welding simulation experiment is completed; and S6, size machining is conducted on the welding sample, a low-temperature impact experiment is conducted, impact energy under different technologies is measured, and the optimal impact toughness of CGHAZ and ICCGHAZ is determined. The method can be used for developing and optimizing the welding process with insufficient low-temperature impact toughness of the submerged-arc welding heat affected zone of the low alloy steel.

The invention discloses a laminated plate impact event three-dimensional strain field inversion method based on binocular vision, and the method comprises the steps: laying dynamic tracking mark points on the surface of an impacted carbon fiber laminated plate, synchronously collecting the image data of the whole impact process through a high-speed binocular camera, and generating a binocular vision image sequence with impact time sequence information; generating three-dimensional displacement field data of the impact area of the carbon fiber laminated plate based on the binocular vision image sequence; calling the anisotropic constitutive model of the carbon fiber laminated plate to generate a preliminary three-dimensional strain field inversion result; and performing coupling operation on the preliminary three-dimensional strain field inversion result, the impact load parameter and the laminated plate material characteristic parameter to generate a final carbon fiber laminated plate three-dimensional strain field inversion result consistent with the dynamic response of the impact event. According to the embodiment of the invention, accurate full-field representation of the dynamic strain of the impact event can be realized, and reliable data support is provided for impact resistance evaluation and structure optimization of the laminated plate.

The technology provides a device that measures an internal structural integrity and surface hardness of baseball bats having a bat clamp that secures the baseball bat at a handle end, a bat support that secures the baseball bat at a barrel end, and a rebound hammer that impacts the baseball bat to determine a coefficient of restitution value. The rebound hammer may indirectly impact the baseball bat through a force dispersing tool. The technology further provides a device that measures vibration propagation within baseball bats, having a bat clamp that secures the baseball bat at a handle end, a vibration sensor provided proximate to the handle end, and a vibration impact tool that impacts the baseball bat to transfer a force thereto.

The invention provides a method for detecting the influence of temperature and mechanical deformation accumulation on the anti-short circuit performance of a converter transformer, belongs to the technical field of converter transformer anti-short circuit, and deeply studies the mechanical response characteristics of the converter transformer under different temperature and dynamic force load conditions through precise experiments and data analysis. Firstly, material characteristic parameters are obtained, temperature and mechanical load tests are carried out on a dynamic mechanical tension press, and temperature field distribution, mechanical response, residual deformation and insulation distance change of a converter transformer component are recorded in detail by using advanced equipment such as a three-dimensional laser scanner, a temperature sensor, a displacement sensor and a high-speed camera system. Through finite element analysis and data processing, a dynamic characteristic database under the accumulated action of temperature and mechanical deformation is established, and a correlation model is trained by applying a machine learning technology, so that the problem that a detection method capable of comprehensively evaluating temperature-mechanical deformation-electrical performance interaction is lacked in the prior art is solved.

The utility model provides mine slope deformation monitoring equipment with adjustable monitoring height, which comprises a slope pressure monitoring device, a soil settlement monitoring device and a mounting rod for connecting the slope pressure monitoring device and the soil settlement monitoring device, and monitoring platforms of the slope pressure monitoring device and the soil settlement monitoring device face the same direction; the slope pressure monitoring device is slidably connected with a rod body of the mounting rod, a rotating handle is arranged outside the rod body of the mounting rod, a transmission assembly connected with the rotating handle is arranged inside the rod body of the mounting rod, the transmission assembly is controlled through the rotating handle, the height of the slope pressure monitoring device on the mounting rod is adjusted, and then the mounting height and the monitoring height of equipment are flexibly controlled. And the practicability of the equipment is improved. According to the side slope multi-parameter monitoring equipment, the side slope pressure monitoring device and the soil body settlement monitoring device are combined, soil body landslide and settlement conditions of a metal mine side slope are monitored in real time, meanwhile, the buffer unit is arranged to protect the equipment, the service life of the equipment is prolonged, and the monitoring cost is reduced.

The invention relates to the technical field of battery safety testing, in particular to a new energy lithium battery impact testing device which comprises a testing table and a supporting column, the supporting column is fixedly connected to the lower surface of the testing table, a shell is fixedly connected to the upper surface of the testing table, and speed adjusting mechanisms are arranged on the two opposite outer walls of the shell. Butt joint mechanisms are arranged on the two opposite sides of the upper surface of the test board, a firing pin and a collision block are arranged on the two sides of the top of an inner cavity of the shell, a rotating cover is slidably connected to one end of the upper surface of the test board, and a linkage mechanism is arranged in the test board. According to the new energy lithium battery impact test device, tested batteries can be divided into columnar lithium batteries and cuboid lithium batteries, the columnar lithium batteries and the cuboid lithium batteries can be clamped, if impact test types need to be replaced, the impact test types can be replaced through a linkage mechanism, the automation degree is high, and the test efficiency is high. Technicians do not need to manually replace collision objects, and manpower and time are saved.

The invention discloses a layered foundation construction optimization method based on dynamic loading and intelligent inversion, and relates to the technical field of intelligent geotechnical engineering. In order to solve the problem that comprehensive analysis and optimization design of multiple layers of soil bodies are difficult to carry out in the prior art, the invention provides the following technical scheme: the layered foundation construction optimization method based on dynamic loading and intelligent inversion is characterized by comprising the following steps: S1, applying a dynamic load on a known layer of soil body; s2, acquiring response data, including acceleration, displacement and stress, of the soil body under the action of the dynamic load through a sensor; s3, deducing the dynamic response of the lower-layer soil body by using an inversion algorithm based on the acquired response data; s4, analyzing dynamic response characteristics of each layer of soil body; and S5, optimizing the compactness and the elastic modulus of the soil layer. The method can improve the accuracy and efficiency of soil dynamic response analysis, is suitable for mechanical property optimization in complex foundation engineering, and has wide engineering application value.

The utility model discloses a cantilever beam impact testing machine, and relates to the technical field of testing machines. The cantilever beam impact testing machine comprises a testing machine base, a cantilever beam body is fixedly connected to the testing machine base, an electric push rod is arranged on the cantilever beam body, an impact head is arranged at the output end of the electric push rod, and a positioning mechanism used for limiting a test sample is arranged above the testing machine base. The positioning mechanism comprises a positioning seat fixedly connected to the testing machine base, and the positioning seat is provided with a clamping assembly and an impact positioning assembly. According to the cantilever beam impact testing machine, through the design of the positioning mechanism, during operation, the position of the impact positioning assembly is firstly adjusted, so that the impact width position of a test sample is quickly clamped to form positioning, then the test sample is clamped and positioned by utilizing the clamping assembly, and the toughness of the test sample is quickly tested; the test sample can be conveniently and quickly positioned, and the operation process is time-saving and labor-saving.

The invention relates to the technical field of extracranial strike testing, in particular to digitally-controlled extracranial strike construction equipment of a traumatic brain injury model. Comprising a test platform, a sliding rail installed on the test platform and arranged in the length direction of the test platform, an animal fixing platform slidably connected with the test platform through the sliding rail, an impact structure arranged on one side of the test platform and a driving structure used for driving the animal fixing platform to move towards the impact structure. The impact structure is fixedly connected to the test platform, the output end of the impact structure faces the animal fixing platform, an experimental animal is installed on the animal fixing platform, the driving structure drives the animal fixing platform to enable the experimental animal to actively impact, and the impact structure enables the experimental animal to impact a fixed acting point at a certain initial speed. The system is more in line with the injury mechanism of a patient with clinical actual craniocerebral trauma, and a tester can accurately control and monitor parameters according to the moving speed and the moving distance of the animal fixing platform.

The invention relates to the technical field of new energy automobile battery testing, and discloses a new energy automobile battery aluminum alloy bottom shell impact testing device and method. The new energy automobile battery aluminum alloy bottom shell impact test device comprises a base, a driving frame is slidably arranged on the base, an acceleration mechanism for driving the driving frame to move at a high speed is installed on the base, a rotary driving seat is fixedly connected to the upper end of the driving frame, and a servo motor is installed in the rotary driving seat. And the driving end of the servo motor is fixedly connected with a multi-module mounting seat. According to the new energy automobile battery aluminum alloy bottom shell impact test method, an acceleration mechanism on a base drives a driving frame to move at a high speed, a rotary driving seat is driven to impact a battery pack mounted in an automobile battery detection positioning mechanism, and a servo motor drives a multi-module mounting seat to rotate and locks a required model seat for impact test. Therefore, various impact working conditions possibly encountered by the battery bottom case in actual use are comprehensively simulated, and the diversity and accuracy of testing are ensured.

The invention belongs to the technical field of equipment monitoring, and discloses a stress wave sensing-based measurement method and system applied to a wind power blade. Comprising the following steps: acquiring stress wave signal data, preprocessing the stress wave signal data, and sequentially performing bipolar cooperative decomposition, error correction and environmental interference suppression on the stress wave signal data to obtain perfect stress wave signal data; performing feature extraction on the perfect stress wave signal data, generating an intermediate feature matrix, performing further feature screening on the intermediate feature matrix, and outputting stress wave signal feature data; constructing a damage assessment model based on the stress wave signal feature data, and performing damage assessment on the wind power blade by using the damage assessment model to obtain a damage assessment record; generating a three-dimensional damage map based on the damage evaluation record, and sending the three-dimensional damage map to a preset wind power equipment safety terminal; equipment monitoring on the wind power blade is realized by using the stress wave.

The invention relates to the technical field of fabric testing, in particular to an experimental testing method and device for determining the impact resistance of fabric, and the method comprises the following steps: S1, initial calibration: installing the fabric to be tested on a fabric frame, adjusting the tension of the fabric to be tested to a set value through a first electric push rod, starting an electromagnetic suction table to compress a spring to an energy storage state, and starting a second electric push rod; the pressure sensor array module is impacted by a bullet launched in a no-load mode, the process is repeated three times, an impact force calibration value is obtained, and the speed measurement sensor is synchronously calibrated, and S2, testing position switching is conducted, and liquid agar gel is injected into the transparent gel cylinder. According to the invention, through a unique spring system, the linear transmission module is utilized to drive the electromagnetic suction table to move, and the stretching amount of the spring is accurately controlled, so that the accurate adjustment of the projectile launching speed is realized, and the impact at various speeds can be simulated when the impact resistance of the fabric is tested.

The present disclosure provides a prediction method of electrochemical and mechanical performances of a Solid Oxide Fuel Cell (SOFC) in a cold-hot cycle, and belongs to the technical field of SOFCs. In the present disclosure, a cold-hot cycle test is performed on SOFC pile, a polarization curve and an electrochemical impedance spectroscopy are measured by an electrochemical workstation, and contributions of different electrode reaction processes to voltage attenuation are analyzed quantitatively; the mechanical performance (bending strength, elastic modulus and hardness) after different numbers of cold-hot cycle services is tested, and based on change of Ni particles, the electrochemical performance and the mechanical performance of the SOFC pile are quantitatively associated; an attenuation coupling relationship of the electrochemical performance and the mechanical performance of the SOFC pile is disclosed and an attenuation theory model of the electrochemical performance and the mechanical performance of the SOFC pile is built. In this way, a change law of the electrochemical performance and the mechanical performance of the SOFC pile after different numbers of cold-hot cycles and a cold-hot cycle service life of the SOFC pile can be accurately predicted, which is of great significance to improve the thermal shock resistance of the cold-hot cycles of the SOFC pile, so as to promote SOFC commercialization applications.

The invention provides an impact deformation feature extraction method based on high-speed camera shooting and image processing, and the method comprises the steps: collecting the transient deformation data of the edge package of a remote controller housing under impact through high-speed camera shooting, recording the change speed of a strain rate, obtaining the material characteristics, the size of a package structure, and the geometric discontinuous features of an opening and closing part, generating continuous frame sequence images; performing strain field data quantification processing on the third visualization result, extracting strain field characteristic data, and judging influence weights of stress wave reflection on strain fields of different functional areas of the shell in combination with a falling height and an impact angle of the remote controller; and improving edge packaging design parameters according to the deformation buffer effect and discontinuous quantitative indexes at the opening and closing positions, verifying the improvement amplitude of the deformation buffer effect, and obtaining strain field distribution data of the optimized shell.

The invention discloses a petrochemical pipeline impact performance detection device, and relates to the technical field of impact performance detection.The petrochemical pipeline impact performance detection device comprises a rack, a linear motion module is installed on the side portion of the rack, a frame body is installed at the output end of the linear motion module, and a drop hammer assembly is installed on the frame body; a lower supporting piece is installed on the lower portion of the middle of the machine frame and used for supporting a petroleum pipeline. A first electric push rod is mounted on the left side of the rack, and the first three-jaw chuck part and the second three-jaw chuck part are used for clamping the two ends of a petrochemical pipeline correspondingly; and a control piece is mounted on the outer wall of the right side of the rack. According to the petrochemical pipeline impact performance detection device, a petroleum pipeline is clamped and fixed through a first three-jaw chuck part and a second three-jaw chuck part, the impact performance detection position is adjusted through cooperation of a linear motion module and a rotating part, and meanwhile the temperature state of the petroleum pipeline can be adjusted through cooperation of a control part and a temperature adjusting part; and different working conditions can be better simulated.

The invention relates to the technical field of mortar strength detection, in particular to a penetration type mortar strength detection device. According to the device, gravel attribute parameters corresponding to mortar to be detected are obtained through detection, the porosity of gravel is obtained through calculation based on the gravel attribute parameters, gravel liquefaction test of shear wave velocity is conducted on the gravel based on the porosity of the gravel, the liquefaction resistance strength of the gravel is obtained, and mortar preparation is conducted on the gravel meeting the mortar preparation requirement. The method comprises the following steps: detecting a mortar solidification sample based on a penetration type mortar strength detection instrument to obtain mortar strength, carrying out stability detection on the mortar solidification sample based on a transient dynamic method to obtain an integrity detection result of the mortar solidification sample, and evaluating the stability of the mortar solidification sample according to an analysis result to obtain a stability evaluation result. The quality of the mortar solidification sample is evaluated based on the mortar strength and stability evaluation result, and the accuracy and reliability of the quality detection result of the mortar solidification sample can be ensured according to the mortar attribute information.

The invention provides a three-axis six-direction impact test simulation method and system based on an F-DEM, and the method comprises the steps: building a full-size model frame, coupling the F-DEM, carrying out the dynamic solving of a model, and carrying out the post-processing of automatic data. The invention further provides a triaxial six-direction impact test simulation system based on the F-DEM, a three-dimensional full-scale numerical model is established based on basic parameters of a waveguide rod and a rock sample in a TEHB test system, and the three-dimensional full-scale numerical model comprises a discrete element rock sample model and a finite element waveguide rod model. According to the method, efficient coupling modeling of the finite element waveguide rod and the discrete element rock sample is achieved, the method has good stress wave propagation precision, the dynamic response behavior of the rock sample under triaxial six-direction loading can be accurately simulated, and efficient and verifiable technical support is provided for impact response analysis and engineering application research of the rock mass in a complex stress environment.

The invention belongs to the technical field of strength detection, and relates to a track strength detection device and method. The device comprises a detection frame, a torsion stretching part arranged on the detection frame, a soaking box, a stretching roller, a positioning roller, a hammering assembly, a driving part and the like. Static stretching detection, dynamic stretching detection, torsion stretching detection, impact working condition detection, rotation load detection and muddy water soaking load detection of the track body can be realized, and on the basis of the static stretching detection or the dynamic stretching detection, the detection precision is improved. Combined detection is carried out in combination with one to four of four detection modes of torsion stretching detection, impact working condition detection, rotation load detection and muddy water soaking load detection, working conditions of the crawler belt in different working scenes can be simulated, and fatigue performance of the crawler belt under various complex stress conditions can be comprehensively detected. And the reliability of the track in actual use is ensured.

The invention discloses a method for completing a battery pack bottom test based on a linear motor ejection impact ball head, and the method comprises the steps: placing a to-be-tested battery pack on a battery pack bottom ball strike test bench, and enabling a power device of a bottom impact test device to drive the impact ball head of the battery pack bottom ball strike test to impact the battery pack from the bottom of the to-be-tested battery pack; the power device is a linear motor, the impact ball head is installed at the head of the linear motor, the impact ball head is driven by the linear motor, the battery pack is impacted from the bottom of the battery pack according to the impact force and the impact mode required by the bottom ball strike test of the battery pack, and the bottom ball strike test of the battery pack to be tested is carried out. According to the invention, an impact ball head driving mode of a battery pack bottom ball impact test is changed into a linear motor driving mode so as to determine the speed and the energy impact direction designated position, and compared with the existing spring, pneumatic and other emission modes in the industry, the energy control precision is higher, the repeatability is good, the adjustment and control are convenient, and the operation is simple.

The invention discloses a sampling method for comprehensive performance testing of TA5 titanium alloy plates, and relates to the field of performance testing of metal materials. According to the method, comprehensive detection of multiple indexes such as the tensile property, the hardness and the impact toughness of the plate is realized by scientifically dividing the plate area, optimizing the sampling size and quantity and combining a dynamic self-adaptive wire cutting technology. The method comprises the specific steps that a plate is evenly divided into five areas A-E in the width direction, a front section, a middle section and a rear section are divided in the rolling direction, and the middle sections B and D are preferentially selected for sampling; determining the sample size according to performance test requirements, such as a tensile sample strip, a hardness sample strip and an impact sample strip; the linear cutting technology is adopted, finite element stress prediction, machine vision defect recognition and a parameter dynamic compensation algorithm are combined, it is ensured that a cutting path avoids a high-stress area and surface defects, and damage is reduced; and the sample quality is ensured through polishing and surface treatment.

The invention relates to the technical field of strength detection devices, in particular to a mobile phone protective film strength detection device which comprises a lifting test bench and a circulating loading and unloading assembly, an impact head is mounted on the lifting test bench, and the circulating loading and unloading assembly comprises a base, a pushing module, a cylinder roller, a driving shaft, an intermittent transmission module and an adsorption module. The cylinder roller is rotationally installed at the top end of the base, and the number of the adsorption modules is four. According to the device, through the arrangement of the circulating loading and unloading assembly, when the driving shaft rotates, the intermittent transmission module drives the cylinder roller to rotate intermittently, when the adsorption module rotates to the lower position, materials are adsorbed and then transferred to the upper position, the impact head moves downwards to impact the materials, and the cylinder roller rotates again; and then, the adsorption module on the left side rotates to the lower portion, circulating grabbing and releasing of the materials are completed, and therefore a plurality of materials can be conveniently tested, and the testing efficiency is improved.

The invention relates to the technical field of mechanical property testing of metal materials, and provides an unsteady-state in-situ high-temperature forming property testing device and method. A punch constant strain rate loading model is arranged in the device, the punch moving speed is adjusted in real time to realize punch constant strain rate loading, and the rheological behavior of a constant strain rate sensitive material in a complex stress state is accurately tested; a rapid cooling system is arranged, so that accurate simulation of complex unsteady-state forming processes such as actual hot stamping and warm forming is realized, and the unsteady-state in-situ high-temperature forming performance of the material is obtained; in combination with a DIC dynamic strain measurement technology, a strain field and deformation force are collected in real time in a plate high-temperature plane stress bulging test, and local necking strain and main strain and secondary strain change paths are determined. According to the method, the reliability of researching macroscopic rheological behaviors such as strain field distribution, flow behavior, hardening mechanism, forming limit and fracture limit of the plate in a complex stress state can be remarkably improved.

The invention relates to the technical field of vehicle tests, in particular to a material rigidity obtaining method and device for MPDB honeycomb barrier development. The method comprises the following steps: in a simulation environment, comparing 50% bias force wall collision mechanical response at different speeds with 50% bias vehicle-to-vehicle collision mechanical response at 50km / h to obtain a 50% bias force wall test speed matched with the mechanical response; in a real test environment, a test vehicle is controlled to impact the front face of the force wall at the 50% bias force wall test speed, and impact force-time data output by all force measuring units on the force wall are obtained; obtaining stress-displacement data according to the data processing method; and guiding the material development of the front 50% overlapping movement progressive deformation barrier according to the stress-displacement data. The method can guide the material development of the MPDB honeycomb barrier.

The invention relates to the technical field of road surface detection, in particular to a method and a system for identifying impact points of a drop weight deflectometer. The method comprises the following steps: acquiring impact data of the drop weight deflectometer in a calibration process, and setting an initial boundary of a target frequency band according to the impact data; calculating a frequency spectrum according to the initial boundary of the target frequency band, and completing signal reconstruction by using a frequency spectrum calculation result; performing normalization processing on the reconstructed signal, and obtaining a forward differential sequence through a normalization processing result; constructing an acceleration simulation model, preliminarily identifying an impact point based on the forward difference sequence, and adjusting the initial boundary of the target frequency band in combination with the acceleration simulation model and the preliminary identification result of the impact point to obtain an optimal target frequency band boundary; and identifying the impact point of the drop weight deflectometer by using the optimal target frequency band boundary. By combining frequency domain filtering and gradient optimization, the problem of impact point misrecognition caused by high interference noise when the drop weight deflectometer is calibrated is solved.

The invention relates to the technical field of lithium battery detection, and discloses a lithium battery shell toughness detection system. The system comprises a multi-channel data acquisition module for acquiring multi-dimensional deformation data of a lithium battery shell under an impact load; and the signal processing and analyzing module is used for performing dynamic baseline calibration processing on the data and inputting the data into the toughness analyzing and processing layer. The toughness analysis processing layer comprises a signal preprocessing module and a feature analysis module, the feature analysis module comprises an excitation response layer, a waveform reconstruction layer and a toughness judgment layer, and time-frequency domain alignment, dynamic coupling relation modeling and multi-dimensional fusion are carried out respectively to generate a detection result. The method comprises the steps of data acquisition, calibration processing, feature extraction, result generation and the like. The method can accurately detect the toughness of the lithium battery shell, improves the detection precision and efficiency, adapts to complex working conditions, can predict the crack propagation path, and guarantees the safe and reliable operation of the lithium battery.

The invention relates to the field of building material detection, and discloses a building material detection device for building construction, the building material detection device comprises a bottom plate and a supporting plate, a plurality of supporting rods are connected to the middle of the upper surface of the bottom plate, the top ends of the supporting rods are connected to the supporting plate, and the supporting plate is in an annular plate shape; a fixing frame is fastened to the edge of the left side of the upper face of the bottom plate through bolts, a detection structure is arranged on the fixing frame through a movable lifting structure, a rotary feeding structure is arranged on a supporting plate, and in the process that the movable lifting structure drives the detection structure to move up and down to detect building materials, the detection structure is matched with a driving structure; the detection structure can be automatically and intermittently driven to move in the horizontal direction, so that the anti-stamping detection is automatically performed on each position on the building material, the detection accuracy is improved, the operation is more labor-saving and convenient, and the detection working efficiency is improved.

A shock testing machine including: a test platform for holding an item to be shock tested; a carriage for carrying the test platform and being movable relative to the test platform in a testing direction, the testing direction being a direction of movement of the carriage; one or more rails movably supporting one of the test platform and the carriage; a stop configured to stop the carriage from moving in the testing direction at a predetermined location while allowing the test platform to continue moving in the testing direction past the predetermined location; and a brake configured to decelerate the test platform after the carriage has been stopped by the stop.