865 results about "Impact test" patented technology

The present invention belongs to the technical field of impact tests, and particularly relates to a catapult take-off and arrested impact test apparatus, comprising a supporting frame, an auxiliary supporting and guiding apparatus above the supporting frame, a mounting base below the supporting frame, a servo actuator, an oil circuit system, and a control and measurement system. The oil circuit system comprises an oil source, a low-pressure accumulator group, a high-pressure accumulator group, an oil inlet valve block, an oil return valve block, a servo valve block, an oil source low-pressure oil return pipe, an oil source high-pressure oil outlet pipe, and necessary tubes among components. The control and measurement system comprises a vibration and impact loading upper computer, a vibration impact controller, a static loading upper computer, a hydraulic servo controller, a servo valve, and an accelerometer. The servo actuator is internally provided with a displacement sensor. The present invention can be widely applied to conventional vibration and impact tests of various suspension launch apparatuses in a suspension-mounted state, as well as arrested impact tests under composite waveforms.

The present invention provides a flow diversion device based on a one-way water pool, which relates to the field of ship engineering technology, and solves the technical problem that a physical model will cause wave damage in a one-way water pool in a wind and wave test, resulting in inaccurate experimental data. The flow diversion device includes a physical model, a lifting device, a flow diversion device and a water pool; the water pool has a first pool bottom and two oppositely arranged pool side plates, and the two pool side plates and the first pool bottom are arranged in a U-shaped structure; the lifting device is used to change the height of the physical model in the water pool; one end of the flow diversion device is hinged to one side of the incoming flow direction of the physical model, and the other end is slidably arranged on the first pool bottom of the water pool; when the physical model has a preset height from the first pool bottom of the water pool, the flow diversion device guides the incoming flow from the first pool bottom of the water pool to the physical model. The flow diversion device ensures that the physical model will not cause wave damage during the wind and wave impact test, thereby ensuring the accuracy of the experimental data.

The invention provides a multivariate numerical analysis method and system based on a TEHB test system, and the method comprises a multidirectional synchronous impact test numerical simulation step: building a rock numerical model with a real mineral structure and breakable mineral crystals, and constructing a single-axis bidirectional synchronous impact test simulation frame, the multi-directional synchronous impact test simulation module is used for implementing multi-directional synchronous impact test numerical simulation on the rock numerical model; a dynamic response index calculation step: separating and recombining the incident wave signal and the reflected wave signal obtained by monitoring, and obtaining a dynamic response index of the rock numerical model in the impact process; and a multi-element parameter intelligent analysis step: during numerical simulation of the multidirectional synchronous impact test, displaying spatial distribution characteristics of different types of cracks in real time, and realizing intelligent microscopic analysis of crack evolution, rock damage and energy characteristics. According to the invention, the dynamic mechanical behavior of the rock under the impact load can be simulated, and the real-time fracture information in the rock can be displayed more visually.

A two-point excitation air cannon impact test system, comprising two air cannons (38, 39), a supporting structure, a resonator plate (37), spacer blocks (36) and a test tool (35). The air cannons (38, 39) each comprise an air path integrated system and a synchronous controller; the resonator plate (37) is fixedly connected to the supporting structure; the test tool (35) is fixed on the resonator plate (37) by means of the spacer blocks (36); the two air cannons (38, 39) are respectively located directly below the test tool (35); the two air cannons (38, 39) are respectively pressurized by means of the air path integrated systems; the pressurizing process of the air path integrated systems can ensure that the two air cannons (38, 39) release completely the same pressure; and the synchronous controllers control the air cannons (38, 39) to synchronously drive projectiles in the air cannons to impact the resonator plate (37), so as to form the two-point excitation air cannon impact test system.

The invention belongs to the field of unmanned aerial vehicle safety, and particularly relates to an unmanned aerial vehicle high-speed collision body safety evaluation test device, which comprises a collision protection cabin, a speed measurement device, a sabot separation mechanism, a special-shaped gun barrel, a rapid bomb loading device and a gas storage tank, the special-shaped gun barrel is cylindrical and horizontally arranged, the impact protection cabins are arranged on the outer side of the output end of the special-shaped gun barrel at intervals, and the speed measuring device is arranged between the impact protection cabins and the output end of the special-shaped gun barrel. The high-speed impact test of the unmanned aerial vehicle is realized by adopting the special-shaped gun barrel and the integrated sabot separation mechanism and adopting the 400mm large-diameter gas gun impact test device to accelerate the unmanned aerial vehicle to a specified speed, so that the reliability of a test result is ensured, and the test cost and the test difficulty are also remarkably reduced. Meanwhile, the method has wide applicability, can be used for the unmanned aerial vehicle, and is also suitable for impact damage evaluation of an object of 2 kg or above at the speed of 150 m / s.

The invention provides a wallboard impact test device and test method for simulating a dampening load, and belongs to the field of bearing performance tests. Comprising a dampening wave impact load simulation loading module, a test wall plate is fixed through a test clamp tool module, and in the test impact process, obtained real-time monitoring data are sent to a controller of the dampening wave impact load simulation loading module through a test measurement module so as to complete closed-loop control of dynamic loads when dampening wave impact is simulated; the dampening wave impact load simulation loading module comprises a controller, a hydraulic power unit and a loading unit, and the controller compares experimental data of a dampening wave impact load real experiment with real-time simulation data obtained by the test measurement module, converts an obtained difference value into an electric signal and sends the electric signal to the hydraulic power unit; electric signals are converted into pressure loads through the hydraulic power unit, and actions are executed by the loading unit. According to the invention, the simulation effect of a real dampening wave-colliding service scene can be achieved.

The invention discloses a method for reducing an angle measurement error of a fiber-optic gyroscope under a launching load. The method comprises the following steps: establishing a full-gun finite element dynamic model; correcting dynamic model parameters based on the seat ring test acceleration data; establishing a fiber-optic gyroscope mounting platform angular acceleration response maximum pulse value and pulse width prediction model taking a firing angle as an input variable by adopting an approximate modeling technology, and predicting the fiber-optic gyroscope mounting platform angular acceleration response maximum pulse value and pulse width corresponding to firing data; establishing a three-axis fiber-optic gyroscope zero offset increment prediction model under a half-sine angular acceleration impact load by adopting an angular impact test platform calibration method, and predicting the fiber-optic gyroscope zero offset increment corresponding to the obtained maximum pulse value and pulse width; and compensating the zero offset error of the fiber-optic gyroscope according to a zero offset increment prediction result before emission. According to the invention, the angle measurement precision of the fiber-optic gyroscope in a launching impact environment is effectively improved.

The invention discloses an elevator performance detection method based on video analysis, and relates to the technical field of elevator detection.The method comprises the steps that elevator polyurethane buffer construction information is obtained, and multi-view-angle sensing equipment is configured; performing an impact test on the buffer, and collecting synchronous test video data; multi-dimensional characteristic values such as deformation, stress strain and dynamic response are extracted based on characteristic engineering; in combination with pre-marked test data, constructing a machine learning judgment model taking the three types of features as input; and inputting the characteristic values to the model to realize automatic and accurate judgment on the quality condition of the buffer, and outputting a detection result containing physical performance and qualification judgment. The technical effects of improving the inspection accuracy, enhancing the inspection precision and improving the inspection efficiency are achieved by constructing a set of complete inspection process from video acquisition, preprocessing, feature value extraction, judgment, result output and report generation.

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.

According to the device for detecting the thermal shock resistance and accident resistance of the material, lifting equipment is arranged on a supporting frame and is used for driving a heavy hammer to move; the electromagnet is installed on the supporting frame and arranged above the heavy hammer. The base is fixedly installed at the bottom of the supporting frame. The driving rod is slidably mounted on the base, and the heavy hammer presses the driving rod to move when falling down; the driving shaft is rotationally mounted on the base; when sliding, the driving rod drives the driving shaft to rotate through the linkage mechanism; the impact test bar is replaced according to an actual working condition needing to be simulated and is fixedly mounted on the driving shaft; the clamp is mounted on the base to clamp a material test block; when the driving shaft rotates, the impact test bar generates friction on the material test block; the heating coil is driven by telescopic equipment mounted on the support frame to move and is used for heating the impact test bar; the water spraying equipment is mounted on the supporting frame and used for spraying water to the impact test bar; contact type thermal shock in an actual production environment is simulated in a mode that the impact test bar repeatedly rubs the material test block.

The invention provides a bird body collecting device for engine bird impact test speed calibration, which comprises a mounting bottom plate and a buffer collector, and is characterized in that the collector comprises a collecting guide pipe, and the guide pipe comprises a vertical section, a bent section and a horizontal section which are communicated in sequence; a buffer assembly is arranged at the bottom of the vertical section and fixed to the bottom plate, and a bird body divider is arranged at an opening of the horizontal section. The front cabin is fixedly connected with the opening of the horizontal section, a speed monitor and an electromagnetic switch device are arranged in the front cabin, an anti-splashing cabin door is arranged at the inlet end of the front cabin, the electromagnetic switch device is connected with the anti-splashing cabin door, and the speed monitor is used for monitoring the flight speed of a bird body and is connected with the electromagnetic switch device; when the speed signal is monitored, the electromagnetic switch device is triggered to control the anti-splashing cabin door to be closed. The device has the advantages of miniaturization, automation, good buffering effect, easiness in operation and the like, and solves the problems of large bird impact, difficulty in residue collection and the like during bird speed calibration.

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 belongs to the technical field of optical glass, and discloses an impact test device for manufacturing optical glass, which comprises a bearing platform, a guide assembly mounted on the bearing platform, a support assembly arranged on the guide assembly, and an impact test assembly arranged on the support assembly, the protection assembly is mounted on the supporting assembly; a steel ball vertically falls to impact optical glass, two supporting assemblies are pushed to move oppositely in the falling process, a movable frame moves to the vertical end along a guide groove through a connecting piece, and at the moment, the movable frame and a supporting roller rod move oppositely along the lower end of the guide groove under the action of a second tension spring; the distance between the two supporting roller rods is shortened by rotating the two supporting roller rods, the two supporting roller rods move downwards and the distance between the two supporting roller rods is shortened in the rebounding process of the steel ball, the steel ball is supported through the two supporting roller rods, the situation that the steel ball rebounds and secondarily impacts optical glass is avoided, and therefore the accuracy of the optical glass impact test is guaranteed.

The invention discloses a particle separator bird / ice foreign object separation characteristic stepping verification method comprising the following steps: plate test verification: simplifying a particle separator front combination inner wall structure, constructing a plate test assembly, constructing a test bench, and carrying out a bird ice impact test to evaluate typical structure surface rebound and action characteristics of bird / ice in airflow; sector test verification: obtaining a sector test piece, building a test bed, and carrying out a bird / ice impact and separation test so as to evaluate the separation characteristics of the particle separator structure to the bird / ice under the approximate working condition; and full-ring test verification: obtaining a full-ring test piece, building a test bed, and carrying out a bird / ice impact and separation test so as to evaluate full-ring separation efficiency and structural response. According to the method, the bird / ice foreign object separation performance is progressively evaluated through a flat plate-sector-full ring three-stage verification system, the bird / ice separation capacity of the particle separator under different working conditions is gradually revealed, the separation characteristic rule of the particle separator is mastered, and reliable data support is provided for design of an engine air inlet protection system.

The utility model provides an automobile part impact test device, which comprises a base arranged right below a drop hammer, a plurality of uniformly arranged screw rods are arranged on the upper surface of the base, a plurality of vertical plates are sleeved on the screw rods, limiting nuts are arranged on two sides of a through hole along the length direction of the screw rods, the limiting nuts are in threaded connection with the screw rods, and the vertical plates are arranged on the vertical plates. A guide rail strip perpendicular to the screw rod is installed at the upper end of the vertical plate, a sliding block is installed in the guide rail strip in a sliding mode, a supporting column is installed on the upper surface of the sliding block, L-shaped plates are installed on the lower portions of the two parallel side faces of the supporting column, and a height-adjustable connecting piece used for being connected with automobile parts is installed on the supporting column. The beneficial effects of the utility model are that the positioning point can be adjusted according to the position of the part used for installing the connecting screw on the automobile part, the limiting device is suitable for the limiting requirements of different automobile parts in the impact test, and the application range is expanded.

The invention relates to the field of building material performance detection, and discloses building material impact resistance detection equipment, which comprises a detection machine main body, a material placement groove, a cantilever, an impact mechanism, a slide rail, a placement cylinder, a balancing weight and a balancing weight mechanism, the material placing groove is formed in the top of the detection machine main body; the cantilever is located behind the material containing groove and fixedly connected to the top of the detection machine body. The impact mechanism is connected with the cantilever; the sliding rail is fixedly connected to the front face of the cantilever, and a sliding block part of the sliding rail is fixedly connected with the containing cylinder. The placing barrel is located above the material placing groove, the balancing weights are vertically stacked, the balance weight mechanism and the balancing weights are both installed in the placing barrel, and the balance weight mechanism is located on the outer sides of the balancing weights. The effect of automatically adding and disassembling the balancing weights is achieved through the balancing weight mechanism, manual operation of workers is not needed, and multiple impact tests of different specifications can be conveniently carried out.

The utility model discloses a material testing device under erosion and cavitation coupling action, which comprises a container, an ultrasonic transducer, an injector head and a circulating device, a placing table is arranged in the container, the ultrasonic transducer is used for being arranged above the placing table, the injector head is arranged at the lower end of the ultrasonic transducer, and the circulating device is arranged on the placing table. The circulating device comprises a booster pump, a liquid inlet of the booster pump is communicated with the container, and a liquid outlet of the booster pump is connected with the injector head through a pipeline; in the using state, the ultrasonic transducer is electrically connected with an ultrasonic power source through a wire. According to the utility model, the erosion medium is pumped into the injector head through the booster pump, and meanwhile, the ultrasonic transducer enables the erosion medium to generate a large number of bubbles in the injector head, so that the erosion medium with the bubbles impacts a test material at a high speed, and the test condition of the hydraulic mechanical material is met.

The invention belongs to the field of railway vehicle component high-speed impact object impact experiments, and discloses a railway vehicle component high-speed impact object impact rapid cooling environment box which comprises a box body, one side face of the box body is an impact object incident door, and liquid nitrogen condensation pipes and environment temperature and humidity sensors are laid on the inner walls of the other side faces of the box body. The liquid nitrogen condensation pipe is connected with the self-pressurization liquid nitrogen tank through an external channel, so that conduction and conveying of a cooling medium are realized; the impact object incident door is movably connected with the box body framework, a position-adjustable sliding mechanism is arranged on the impact object incident door, stretchable parts are connected to the left side and the right side of the position-adjustable sliding mechanism, a disposable low-strength sealing heat insulation film is arranged on the position-adjustable sliding mechanism, and an impact object incident port is located in the area of the disposable low-strength sealing heat insulation film; a to-be-tested piece fixing and mounting clamp is arranged on the inner wall of the box; a high-speed camera mounting interface is arranged on the inner wall of the box body, and the rotary supporting seat is arranged at the bottom of the box body. According to the environment box, a preset low-temperature environment can be quickly realized, and multi-angle impact tests can be realized.

The invention discloses an aircraft panel impact test boundary stiffness equivalent simulation method and device, and belongs to the technical field of aircraft ground tests. According to the equivalent simulation device, a local wall plate test piece is adopted to replace an overall fuselage frame to carry out an impact test, a supporting rack is arranged on a base, and a vertical rigidity simulation spring assembly and a bending rigidity simulation device are borne on the basis of the supporting rack; a torsional rigidity simulation spring assembly and a longitudinal rigidity simulation spring assembly are arranged on the bending rigidity simulation device, and a local wallboard test piece is installed on the bending rigidity simulation device. According to the simulation device, the boundary rigidity of the aircraft panel when the aircraft panel is impacted is decomposed into torsional rigidity, vertical rigidity and longitudinal rigidity, so that the boundary rigidity is converted into three groups of linear springs in different directions for rigidity simulation, accurate simulation of the boundary rigidity is ensured, decoupling of boundary rigidity simulation is also realized, and the simulation accuracy is improved. And the design difficulty of the test device is reduced.

The invention provides a launching mechanism and an inclined water entry impact test system. The launching mechanism comprises a launching device, a test structure body and a launching frame, the launching frame comprises an erecting frame, a baffle and a sliding frame, the baffle is arranged at one end of the erecting frame, an opening is formed in the other end of the erecting frame, the launching device is installed on the sliding frame, the sliding frame is arranged on the erecting frame in a sliding mode, and the test structure body is arranged on the sliding frame. The end, away from the launching port, of the launching device is connected with the baffle through a first energy absorber, one end of the sliding frame is connected with the erecting frame through a second energy absorber, and the other end of the sliding frame is connected with the erecting frame through a third energy absorber. The launching mechanism generates recoil resistance through the first energy absorber, the second energy absorber and the third energy absorber. Ejection power is provided for the test structural body through the multiple phase change pipes, high-speed water entry of the test structural body can be achieved, appropriate damping parameters are matched for different load test structural bodies, and recoil in the launching process is buffered and eliminated.

The invention discloses a dynamic self-adaption and multi-physics field coupled coal roadway impact test system and method, and belongs to the technical field of coal roadway tunneling. The system comprises a coal roadway tunneling model, loading equipment, a sensor module, a multi-strain-rate coupling feedback module, a control module and numerical simulation software. Loading equipment comprises an impact oil cylinder, a thrust oil cylinder and a variable-stiffness spring, and the position of an impact module can be adjusted. The sensor module collects a variety of data. The multi-strain-rate coupling feedback module processes sensor signals. The control module controls all the parts to operate. The impact method comprises the steps of system initialization, data acquisition and processing, state evaluation and instruction generation, loading parameter adjustment and analog calculation, result feedback and optimization and the like. The method can monitor and adjust in real time, considers multi-physical field coupling, accurately evaluates the stability of the coal roadway, improves the tunneling safety and efficiency, and can be widely applied to the field of coal roadway tunneling engineering.

The invention relates to the technical field of spacecraft ground test equipment, in particular to a launching device for a spacecraft landing impact test based on push rod linkage, and is characterized in that one end of a sling is connected with a lower hanging ring, the lower hanging ring is arranged at the bottom of a shell, a driving mechanism is mounted in an upper cavity, and a releasing mechanism is mounted in a lower cavity; the output end of the driving mechanism penetrates through the partition plate to be in transmission connection with the releasing mechanism, the positioning disc is clamped to the bottom of the releasing mechanism, the spacecraft is connected to the bottom of the positioning disc, the lower hanging ring is hinged to the positioning disc, the upper hanging ring is installed on the top of the shell, and the other end of the hanging belt is connected with the upper hanging ring. The releasing operation is more convenient, it is ensured that the releasing device can be repeatedly used, meanwhile, the symmetrical structural design is adopted, the mass center is arranged in the center of the shell, and the unstable conditions such as overturning, shaking or rotating in the releasing process of the spacecraft are avoided.

The invention discloses an electromagnetic circulating impact test device and method, belongs to the technical field of impact tests, and provides the following scheme that the electromagnetic circulating impact test device comprises an electromagnetic test mechanism, a test sealing mechanism is assembled on the electromagnetic test mechanism, and the electromagnetic test mechanism comprises a rack, an incident bar and a transmission bar; an electromagnetic test assembly is arranged on the rack, the test sealing mechanism comprises a shell, and the shell is fixedly installed on one side of the rack; the adjusting cavity is moved to drive the transmission assembly to move, so that the balls are matched with the chutes to realize transmission of the transmission assembly and the adjustable discharging assembly, the sample table is turned over and inclined, residues on the surface of the sample table can be poured into the cavity, dust removal operation can be performed in cooperation with the dust removal assembly in the pouring process, and a good test environment is kept; in this way, the purpose of automatic cleaning can be achieved, operation steps and difficulty are reduced, residues are collected through the cavity, and the residues can be conveniently cleaned through the side door.

The present invention discloses a high and low temperature cold and hot shock test device and method for hydrogen fuel cells, the device includes: a flushing channel for clamping a sample to be tested; a first refrigerator and a second refrigerator connected in series, a first control valve is provided between the two, used to control the timing and flow rate of the medium flowing from the second refrigerator into the first refrigerator, the first refrigerator, the second refrigerator and the flushing channel form a cold shock circuit; a first heating machine and a second heating machine connected in series, a second control valve is provided between the two, used to control the timing and flow rate of the medium flowing from the second heating machine into the first heating machine, the first heating machine, the second heating machine and the flushing channel form a thermal shock circuit. The present invention controls the input and output of the flushing medium by setting a multi-stage cooling / heating mechanism, separates the reflux medium from the flushing medium, and realizes the alternating stable flushing of the medium below ‑20°C and the medium above 80°C, without causing temperature instability due to the influence of the reflux medium.

The invention discloses a marine equipment impact test platform, and relates to the technical field of marine equipment tests. The device comprises a test pool, the bottom of the test pool is fixedly provided with a plurality of water cannon pipes, the top ends of the plurality of water cannon pipes are fixedly provided with turning pipes, the test pool is internally provided with a test floating platform, the test floating platform is internally fixedly provided with a placing platform, and the placing platform is internally provided with equipment to be tested. By arranging the water cannon pipes, a high-pressure water source conveys high-pressure water flow into the test pool through the water cannon pipes, and meanwhile, the water flow is turned through the turning pipes, so that irregular undercurrent is formed in the test pool, large-scale waves appear on the water surface of the test pool, and the test floating platform shakes along with the waves; the wave amplitude can be controlled by controlling the water pressure, so that the stability of the to-be-tested equipment when the ship body is impacted by waves is tested, the scene that the ship body shakes in storm waves is simulated, and the test result is closer to the actual environment.

A buffering device for a spacecraft landing impact test comprises a lifting appliance, a releasing device, an electric throwing assembly, a limiting protection device and a buffering energy absorption device, and the lifting appliance is a tool for lifting a spacecraft and is used for hanging the spacecraft; the upper end of the release device is hung on the crown block hook, and the lower end is connected with the hanger to lift the hanger and the spacecraft; the electrical releasing assembly is connected with the releasing device and supplies power to the releasing device, so that the releasing device releases the lifting appliance when electrified; the buffering energy-absorbing device is used for limiting and protecting the spacecraft after the spacecraft is released, the two ends of the buffering energy-absorbing device are connected with the limiting protection devices respectively, the limiting protection device at one end is connected with the crown block hook, and the limiting protection device at the other end is connected with the upper end of the lifting appliance. Linear speed reduction is provided for falling of the lifting appliance, instant braking of the lifting appliance is converted into slow stop motion, impact energy in the free falling process of the lifting appliance can be effectively absorbed, the lifting appliance can stably move in the landing impact test process, and a spacecraft and a crane are protected.

The invention relates to the technical field of vehicle collision test, in particular to a vehicle safety island collision test system and method. The system comprises a safety island device composed of a safety island wall barrier mounting plate and a safety island wall barrier, and the safety island wall barrier mounting plate is provided with kidney-shaped mounting holes used for adjusting the position of the safety island wall barrier; the traction device is used for pulling the to-be-tested vehicle and enabling the to-be-tested vehicle to impact the safety island device according to a preset speed and a preset angle; and the brake device is connected with the traction device and is used for braking the to-be-tested vehicle when the distance between the to-be-tested vehicle and the safety island device meets a preset distance so as to simulate the collision condition of the to-be-tested vehicle in front of the safety island device. Therefore, by means of the vehicle safety island collision test system, the problem that in the prior art, verification of passenger protection is lacked when the vehicle collides with the safety island in the driving process before the vehicle leaves a factory can be solved, and the safety performance and the collision resistance of the vehicle are improved.

The invention discloses a universal hydrogen cylinder flexible impact test bench, which belongs to the technical field of impact test devices, and comprises a frame body, a gas cylinder supporting device, a position adjusting mechanism, an impact device, a high-speed camera and a control system, the gas cylinder supporting device is mounted on the frame body; the position adjusting mechanism comprises three position adjusting assemblies distributed at intervals in the circumferential direction. Each position adjusting assembly comprises an adjusting motor, a sliding groove block, a lead screw, a guide rod, a pin shaft, a rocker, a first shaft rod and a second shaft rod. The impact device comprises a hydraulic clamp and an impact head, the second shaft rod is rotationally connected to the hydraulic clamp in the horizontal direction, and the hydraulic clamp can clamp or loosen the impact head; the high-speed camera is slidably arranged on one side of the gas cylinder supporting device in the horizontal direction. And the control system is used for respectively controlling the adjusting motor and the hydraulic clamp. According to the invention, low-speed impact can be accurately applied to various positions of the hydrogen cylinder, and the safety and reliability of the hydrogen cylinder at different impact positions can be effectively evaluated.

The present invention belongs to the technical field of foreign object impact on composite material blades of aircraft engines, and specifically discloses a composite material engine blade trailing edge delamination damage test device and test method, the device includes a foreign object impact launch subsystem, a blade typical part test bench and a high-speed camera monitoring subsystem; the foreign object impact launch subsystem is used to launch birdshot; the blade typical part test bench is used to fix the blade typical part so that it is impacted by the birdshot; the high-speed camera monitoring subsystem is used to monitor the birdshot impact process and record the birdshot impact test data. The present invention realizes the control and adjustment of the bird cutting angle, bird impact height and bird cutting amount by designing an adjustable tooling and a detachable typical part fixture of the blade typical part test bench, which solves the problem that the existing technology cannot simultaneously realize the adjustment of the impact height, impact angle and bird cutting amount, and the test research plan is limited by the equipment, and it is difficult to accurately control the impact working condition.

The invention relates to the technical field of numerical simulation of rock dynamics, in particular to a numerical simulation method and system for the whole process of ore rock fracture based on FDEM impact loads.The method comprises the steps that a continuous medium structure is discretized into a finite element network composed of triangular units through FDEM, and an ore rock impact test model is constructed; setting material parameters and impact speed boundary conditions according to the ore rock impact test model; a normal contact force calculation model and a tangential contact force calculation model are established according to material parameters and impact speed boundary conditions, and coordinates and speed updating results of triangular unit nodes are obtained in combination with the Newton second law and the calculation models; and performing visual analysis based on the coordinate and speed updating result, and outputting crack propagation, stress field and energy evolution results under the impact load. The method can accurately simulate the crack propagation, the fracture mode and the energy evolution law of the ore rock under the impact load, quantitatively researches the crushing characteristics and the energy evolution law of the ore rock, and provides a calculation method for the research of the crushing mechanism of the ore rock.