9469 results about "Test rig" patented technology

The invention belongs to the technical field of wind tunnel tests, and particularly relates to a precession simulation device for a spiral flutter wind tunnel test. According to the invention, the design problem of the rotor craft spiral flutter wind tunnel test device is solved, and the key influence parameters and influence rules of the spiral flutter of the aircraft are researched by designing the precession motion simulation device of the rotor craft. Rotation of the rotor wings can be realized in the wind tunnel, and the rotating speed of the rotor wings is adjusted through the motor. Meanwhile, pitching and deflection modal decoupling of the rotating shaft of the rotating system is achieved, and pitching and deflection modal frequencies are independently adjustable; meanwhile, the axis of the pitch axis and the axis of the yaw axis coincide, so that pitching and yaw freedom degree coupling precession motion can be achieved under the effect of gyroscopic moment. Meanwhile, nacelle rotating mass rotational inertia, nacelle weight and mass center position adjustment can be achieved; and finally, the rotating speed of the rotating mass such as the rotor wing and the propeller hub can be adjusted through a speed adjusting motor, matching of the rotating speed and the incoming flow speed is guaranteed, and the spiral flutter state is achieved.

The invention discloses a reciprocating sealing test device of an aviation hydraulic actuator and a verification method, and belongs to the field of aviation airborne equipment test and verification. Comprising an end cover, a nut, an outer cylinder, an inner hexagon screw, a pipe joint, a limiting block, a partition baffle, a piston rod, a lining and the like, and all the parts are assembled to form the complete component-level sealing test device. Performing sealing element inspection before and after an experiment on the to-be-tested sealing element, and inspecting the quality of the movable surface of the test device; then the sealing element is assembled on a test device, and installation technology adaptability inspection is carried out; the test device is installed on a test bench, and sealing characteristic tests including a running-in test, a normal-temperature, high-temperature and low-temperature performance test, a low-pressure static test and a high-pressure static test are carried out; performing environment adaptability tests including low-temperature storage, low-temperature work, high-temperature storage, high-temperature work and temperature shock; sealing life durability tests including normal-temperature, high-temperature and low-temperature motion durability tests are completed; and performing decomposition inspection after the test is finished.

The invention belongs to the field of rock-soil mechanical test equipment, and particularly discloses a shear slip test device for testing mechanical properties of high-temperature fractured rock mass, which comprises a shear test platform, a shear test box, a sound wave emission system, and a temperature control module and a circulating cooling system integrated in the shear test box. The shear test platform realizes independent control of normal force and shear force through a first loading block and a second loading block; the temperature control module and the circulating cooling system can simulate a high-temperature environment and perform a cold and hot cycle test; the acoustic emission system is used for monitoring acoustic emission signals in the rock sample in real time. The device can accurately simulate a high-temperature and cold-hot cycle environment, has high-precision mechanical loading capacity and a multi-parameter monitoring function, provides an effective experimental means for researching the mechanical property and damage mechanism of a high-temperature fractured rock mass, and can be widely applied to the research fields of deep geothermal resource development and enhanced geothermal systems.

The invention discloses an underwater explosion impact equivalent loading test device and method, and belongs to the technical field of dynamic impact test mechanics, the underwater explosion impact equivalent loading test device comprises a light gas gun system, a combined water shock tube system and a measurement control system, the light gas gun system is a shock wave load loading system of a water shock tube, and the combined water shock tube system is connected with the measurement control system. Comprising a piston, a working table support, a steel pipe, a pressure sensor, a connecting flange, a connecting assembly, a transparent pipe, a double-thread screw assembly, a front panel, a test sample, a rear panel, a working table fixing support and a working table top, and a measurement control system comprises a light gas gun pressurization and emission controller, a high-speed acquisition instrument, a first high-speed camera and a second high-speed camera. The underwater explosion impact equivalent loading test device and the underwater explosion impact equivalent loading test method are compact in structure, convenient to use and suitable for researching underwater dynamic impact protection performance and fluid-solid coupling mechanism of materials or structures in laboratories.

The invention relates to the technical field of underground engineering groove wall stability physical simulation, and discloses a model test device and method for stratum excavation and grouting reinforcement, and the model test device comprises a grooving construction module, a grouting support module and a dynamic monitoring module. The device adopts a pressing plate method to simulate a grooving excavation process, so that the device conforms to an actual excavation working condition from top to bottom; a servo motor drives a power lead screw to drive a model groove to move downwards, so that a free face is formed in a sand layer, and the actual excavation working condition is simulated; a water tank for storing fresh slurry is pressurized by using an air compressor, so that the slurry overflows from the hollow model groove section, and the permeation and invasion process of the slurry is simulated; and a water and soil pressure gauge and a matched acquisition device are arranged in the sand layer, and a soil displacement field is obtained by utilizing a particle image velocity measurement system, so that the visualization of the whole process of excavation-grouting-invasion is realized. It is ensured that simulation results are highly matched with actual working conditions, and accuracy and reliability are improved.

The invention provides a reproduction lifting and diving test device, and belongs to the technical field of mechanical control. The problems that a guide rail needs to bear large lateral force for achieving the working conditions of large load mass, large reproduction acceleration and long stroke of existing equipment, and particularly when the stroke is large, the lateral force enables the guide rail to deform greatly are solved. The device comprises lifting actuator assemblies, a cross beam assembly, a motion platform, stand columns, a base and a moment balance assembly, the stand columns are installed at the four corners of the lower end face of the cross beam assembly, the bottoms of the stand columns are connected with the base, the motion platform is installed on the stand columns in a sliding mode, and the four lifting actuator assemblies penetrate through the cross beam assembly to be connected with the motion platform; a moment balance assembly is installed at the joint of the motion platform and the stand column, and an energy accumulator assembly used for supplying energy to the lifting actuator assembly is installed on the cross beam assembly. The device is mainly used for testing the working conditions of large load mass, large reproduction acceleration and long stroke.

The invention discloses a compressed air energy storage indoor simulation test device and method, and relates to the technical field of compressed air energy storage. The device comprises a triaxial pressure servo control system, a temperature control system, an air pressure control system and a multi-parameter measurement system, and can cooperatively simulate the real working environment of the underground gas storage. The triaxial system comprises a high-pressure tank body and a loading device and is used for applying triaxial stress to the rock sample; the temperature control system adjusts the temperature of the rock sample; the air pressure system comprises a high-pressure destructive experiment mode and a low-pressure precise simulation mode, the high-pressure destructive experiment mode is used for carrying out a high-pressure test and verifying the critical burial depth under different geological conditions, and the low-pressure precise simulation mode is used for researching the mechanical behavior, the damage mechanism and the leakage mechanism of the gas storage by regulating and controlling the air pressure and the flow and simulating the inflation and deflation process; the multi-parameter measurement system collects rock sample physical response data in real time. Through cooperative work of multiple systems, response characteristics of multiple support sealing systems under different conditions can be accurately reflected, and the system has remarkable simulation precision, experiment efficiency and cost advantages.

The invention discloses a truck hub maintenance-free bearing all-condition simulation testing machine, which comprises a tool table, a servo driving system, a servo hydraulic system and a temperature control simulation system, and is characterized in that the tool table is provided with a tool seat and a main shaft movably arranged on the tool seat, and a to-be-tested bearing is detachably connected between the main shaft and the tool seat; the servo driving system is in linkage fit with the main shaft to simulate the actual operation condition of the bearing, the tool table is provided with a special-shaped load plate and a mandrel, the special-shaped load plate is in linkage fit with the mandrel, and the mandrel is inserted into an inner ring shaft hole of the bearing to be tested and is detachably connected with the inner ring shaft hole of the bearing to be tested. The servo driving system is in linkage cooperation with the special-shaped load plate to simulate the load working condition of the bearing during actual operation, and the temperature control simulation system is in linkage cooperation with the bearing to be tested to simulate the actual temperature working condition of the bearing. According to the invention, the problem that a test device for carrying out a multi-working-condition simulation test on a truck hub bearing is lacked in the prior art is solved.

The invention belongs to the technical field of marine engineering ship corrosion detection, and particularly relates to a corrosion detection and monitoring device for a ship seawater pump, which consists of a marine environment multi-factor coupling simulation system, an in-situ electrochemical test system and a control and analysis system, wherein the in-situ electrochemical test system and the control and analysis system are connected with the marine environment multi-factor coupling simulation system; by simulating different sea area working conditions of service corrosion of the sea water pump, an accelerated corrosion test is carried out, real-time monitoring of multi-dimensional corrosion factors is realized, key environmental influence factors of the sea water pump are mainly researched, and the service corrosion of the sea water pump is monitored. By means of a multi-coupling physical field monitoring technology and a threshold-trend double-trigger mechanism, a sea water pump corrosion failure model and a service life prediction model are constructed, local-remote real-time corrosion early warning is synchronously achieved, digital support is provided for ocean engineering corrosion big data platform construction and whole life cycle management, sudden safety accidents are effectively avoided, and the service life of a sea water pump is prolonged. The corrosion perforation safety accident risk is reduced, and the service life of the seawater pump and related ocean engineering equipment is prolonged.

The invention discloses a highway bridge expansion joint compression test device, and belongs to the field of expansion joint test devices.The highway bridge expansion joint compression test device comprises a test bed, two sliding rails are symmetrically fixed to the top of the test bed, two limiting mechanisms symmetrically slide on the sliding rails, and an L-shaped supporting seat is fixed to the middle of the back face of the test bed; a hydraulic cylinder is installed in the middle of the top of the L-shaped supporting seat, the output end of the hydraulic cylinder extends to the position over the test bed and is fixedly provided with a pressure testing mechanism, the pressure testing mechanism comprises a fixing plate, the fixing plate is fixedly connected with the output end of the hydraulic cylinder, and three sets of hollow-square-shaped pressing frames are fixed to the bottom face of the fixing plate at equal intervals; the connecting plates are arranged between the two adjacent hollow-square-shaped pressing frames; the fixed frame is fixedly connected to one end of the bottom of the connecting plate. According to the invention, under the stable pressure, the condition that the vehicle performs rolling test on the expansion joint under different conditions is simulated, so that the accuracy of testing the compression resistance of the expansion joint is improved.

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 invention relates to the field of concrete-filled steel tube structure mechanical property tests, in particular to a concrete-filled steel tube arch rib member long-term load and corrosion intelligent test device and method. The test device comprises: a corrosion tank covering the outside of a concrete-filled steel tube arch rib test piece and capable of being filled with or sprayed with a corrosive liquid; the load applying device comprises a plurality of load applying units, and each unit is used for applying long-term load to the concrete-filled steel tube arch rib test piece; the load applying unit comprises a screw rod, a nut, a loading end plate, a loading block and a force transmission block; the loading block penetrates through the corrosion tank and is tightly attached to the test piece, the force transmission block is located below the loading block and is tightly attached to the corrosion tank, and the multiple screws penetrate through the corrosion tank, so that the loading block can apply force to the concrete filled steel tube arch rib test piece; the sensor feeds back data to the data acquisition terminal in real time for processing, and the corrosion process is accurately controlled. According to the invention, the stress characteristics of the concrete-filled steel tube arch bridge under long-term load and corrosion effects can be simulated based on an intelligent technology.

The invention is suitable for the technical field of crack grouting, and relates to a multi-crack-characteristic visual grouting diffusion test device and method.The multi-crack-characteristic visual grouting diffusion test device comprises a multi-interface-characteristic crack structure, a grouting system, a water control system, a monitoring system and a test bed, the multi-interface-characteristic crack structure is arranged on the test bed and connected with the grouting system and the water control system, and the monitoring system is arranged on the test bed and connected with the grouting system and the water control system; the monitoring system is respectively connected with the multi-interface characteristic fracture structure and the test bed; the multi-interface characteristic fracture structure comprises a fracture top plate, a fracture bottom plate, rubber strips and a boundary height control device, the fracture bottom plate is installed on the test bed, the rubber strips are installed on the periphery of the fracture bottom plate, the fracture top plate is placed on the rubber strips on the periphery of the fracture bottom plate, and the fracture top plate, the fracture bottom plate and the rubber strips are fixed to the test bed through the boundary height control device. According to the method, the practical engineering problems of poor grouting effect, poor bonding effect and the like caused by complex crack form and construction environment conditions are effectively solved.

The invention belongs to the technical field of coal field fire evolutionary analysis, and particularly provides a visual coal field fire evolutionary process analog simulation test device and method. The test device comprises a test bench, a physical similarity model, a fiber bragg grating temperature and stress integrated monitoring system, a multi-gas monitoring system, an image and video monitoring system and a computer analysis system. A plurality of opening frames are sequentially fixed to form test box bodies, the physical similarity model is arranged in the test box bodies, the inclination angle of the test box bodies is adjusted through an inclination angle adjusting mechanism, and the gas supply system and the ignition system are connected between the test box bodies. The fiber bragg grating temperature and stress integrated monitoring system, the multi-gas monitoring system and the image and video monitoring system are respectively in signal connection with the computer analysis system. According to the invention, visualization of coal field fire evolution processes under different conditions can be realized, and real-time monitoring of change rules of a temperature field, a seepage field and a fracture field in the coal field fire evolution processes under different conditions can be realized.

The invention discloses a magnetorheological damper durability test device, and particularly relates to the field of magnetorheological dampers, the magnetorheological damper durability test device comprises a box body and a to-be-tested magnetorheological damper, the rear end of the box body is provided with a test cavity with a triangular cross section, and the interiors of the left and right inclined side walls of the test cavity are respectively provided with a liquid storage cavity and an equipment cavity. According to the durability test device for the magneto-rheological damper, the material spraying assembly is arranged, water or powder can be sprayed to the magneto-rheological damper, the device is used for simulating a rainy day environment or simulating a dust and gravel road surface, and the complex environment encountered by the magneto-rheological damper in actual use is truly restored; meanwhile, the amplitude adjusting assembly allows the amplitude of vibration applied to the shock absorber to be accurately and continuously adjusted, and road surfaces with different jolting degrees are simulated. According to the invention, environmental factors such as water, dust, temperature, amplitude, inclination angle and the like can be independently controlled, so that test results can more accurately reflect the durability of the magnetorheological damper under specific working conditions, and data one-sidedness is avoided.

The invention relates to a test device and method for testing the performance of an elevator speed governor, and the device comprises a test rack which is internally provided with a lifting channel for testing; the main rope is hung and wound on the traction machine; the undercarriage is arranged on one side of the traction machine and connected to the main rope, and the car frame is arranged below the undercarriage and connected with the undercarriage through a detacher; the counterweight frame is arranged on the other side of the traction machine and is connected to the main rope; the speed limiter is arranged at the top of the test rack; the rope gripper is arranged at the top of the test rack; and the data acquisition unit is used for acquiring the running speed of the lift car frame, the wheel speed of the speed limiter, the lifting force of the speed limiting rope, an electrical action signal and a mechanical action signal. The performance of the speed governor can be tested under the working conditions that the lift car frame freely falls when running at a rated speed and the lift car frame falls downwards at different accelerations in a static state.

The invention relates to the technical field of rock mass testing, in particular to a tunnel water-rich fault fracture zone area loading simulation test device and method.The tunnel water-rich fault fracture zone area loading simulation test device comprises a test box, and a partition plate is arranged in the test box; the partition plate divides the test box into a first area and a second area, and the second area is filled with a rock-soil sample; a lateral loading structure; a vertical loading structure; the simulated fault test structure comprises a mounting frame fixedly connected to the partition plate, a driving structure and a simulated fault unit, one end of the driving structure is hinged to the mounting frame, and the other end of the driving structure is connected with the simulated fault unit; the fault simulation unit is hinged to the mounting frame and used for simulating an adjustable fault, and the technical problems that an existing test device cannot dynamically adjust the fault fracture width and the dip angle according to the load effect and cannot perform real-time coupling simulation on a hydrological seepage field are solved.

The invention provides a test device for simulating ejection impact load, which is characterized in that side columns of the test device are fixedly arranged, a movement guide rail is arranged on the inner wall of each side column along the vertical direction, a variable stiffness spring is arranged below each movement guide rail, and an electromagnet is arranged at a certain height between the two side columns. The load block is connected with the electromagnet under the magnetic force effect of the electromagnet, the two ends of the load block are slidably connected with the movement guide rails, the impact force sensor is arranged on the load block, the lower bottom face of the impact force sensor is flush with the lower end faces of the two ends of the support, and the model box is arranged below the load block and filled with soil. The surface of a soil body in the model box is flush with the upper end face of the variable-rigidity spring, each crank pulley mechanism is arranged on the corresponding side column and located above the variable-rigidity spring, and after the load block impacts the soil body for the first time and bounces, limiters in the crank pulley mechanisms move to the movement guide rails to prevent the load block from impacting the soil body again.

The invention discloses a multi-axis high-low-cycle composite heat engine fatigue test device and a test method, and relates to the technical field of fatigue test.A clamping swing mechanism and a high-cycle loading mechanism in the device are located on two planes perpendicular to each other, a low-cycle load acts on a test piece through a fatigue testing machine, and a high-cycle load acts on the test piece; the high-cycle load acts on the clamping swing mechanism through the high-cycle loading mechanism, so that high-cycle loading and low-cycle loading of different paths are achieved, and multi-axis loading of the vibration load is achieved due to the asymmetry of the clamping swing mechanism. According to the fatigue test device and test method for the multi-axis high-low-cycle composite heat engine, the real load environment of a blade material is considered, engineering practice is fitted, and a basis is provided for life evaluation.

The invention relates to the technical field of aero-engines, and discloses a labyrinth leakage rate test device and method suitable for low Reynolds number flow, the test device comprises an air inlet section, a labyrinth stator ring, a labyrinth rotor disc, an exhaust section and a flow meter, the tubular rectifier is mainly composed of a plurality of rectification circular tubes which are adjacent to one another. According to the invention, the tubular rectifier is arranged in the exhaust section, the flow leaked by the test labyrinth is rectified by using the tubular rectifier, and then flow measurement is carried out, so that measurement errors caused by airflow rotation and uneven airflow distribution under the condition of low Reynolds number can be inhibited; therefore, the flow measurement accuracy of the leakage airflow under the condition of the low Reynolds number is improved, a labyrinth flow characteristic test under the condition of the low Reynolds number can be conveniently and effectively carried out, labyrinth sealing design and accurate analysis of the leakage rate under the condition of the low Reynolds number are supported, and the problem that an existing labyrinth leakage analysis method is large in error under the condition of the low Reynolds number is avoided.

The invention discloses a multi-dimensional controllable fault-crossing tunnel seismic response modular test device and method, and the device comprises a modular box model which comprises an upper disc box and a lower disc box, the upper disc box is installed on a vibration table, and the lower disc box is installed on a linear sliding table; the two fault dip angle adjusting systems are arranged, and the two fault dip angle adjusting systems are symmetrically arranged between the upper wall box body and the lower wall box body; the number of the positioning modules is two, and the two positioning modules are detachably arranged on the upper disc box body and the lower disc box body correspondingly; the two ends of the tunnel model are installed on the two sets of positioning modules respectively; the monitoring system is arranged in the tunnel model; and the terminal system is connected with the monitoring system. According to the method, the failure mode evolution law of tunnel linings with different section forms is researched by changing the geometrical morphology of the fault, and a basis is provided for the anti-seismic optimization design of a cross-fault tunnel lining structure.

The invention relates to the technical field of tensile tests, and discloses a building sealant stretching performance test device, which comprises a test box, a first clamp, a loading block, a linear driver and a driving mechanism, a door plate is mounted on the front of the test box; the first clamp is installed at the top in the test box, the loading block is arranged in the test box, located below the first clamp and driven by the linear driver to move up and down, a through loading channel is formed in the loading block, and a cylinder is arranged in the loading channel and driven by the driving mechanism to rotate; a through assembly channel is formed in the cylinder body, and a transversely-arranged guide rail body is installed in the assembly channel. According to the invention, by carrying out stretching, torsion, inclined stretching, tearing stretching, winding stretching and testing in a low-pressure environment on the sealant, the mechanical properties of the sealant under complex working conditions can be comprehensively evaluated, the testing precision and reliability are improved, the actual engineering requirements are met, and meanwhile, the testing safety and environmental protection property are ensured.

The invention discloses a fuel rod cladding surface corrosion product deposition test device and method, and belongs to the field of nuclear power. The fuel rod cladding surface corrosion product deposition test device comprises a water supply section and a test section, the test section comprises a high-pressure kettle and a cladding pipe contained in the high-pressure kettle, and a heater is arranged in the cladding pipe to simulate heating of a fuel rod; the water supply section is used for providing circulating solution for the test section and comprises a coolant water tank, a dirt source water tank, a heating device, a pump set and a circulating pipeline, the coolant water tank circularly intervenes in the circulating pipeline to provide circulating simulated coolant, the dirt source water tank is used for injecting simulated dirt liquid into the circulating pipeline, the pump set is used for providing driving force, and the heater is used for heating. The device can accurately control the hydrochemical conditions of the dirt deposition test, keeps the consistency and repeatability of the test conditions in the test process, effectively improves the simulation test precision, and optimizes the test efficiency.

The invention relates to the technical field of wind tunnel tests, in particular to a large-scale model wind tunnel test device and a debugging method thereof. The scale model wind tunnel test device comprises a supporting device which comprises an upper supporting truss, a lower supporting truss and a plurality of supporting stand columns, the upper supporting truss and the lower supporting truss are composed of main beams and anchoring structures, the supporting stand columns are connected with the upper supporting truss and the lower supporting truss, and sliding rails are symmetrically arranged on the upper supporting truss and the lower supporting truss. The large-scale model is connected between the two sliding rails through a line spacing adjusting device and an inclination angle adjusting device, large-scale model assemblies are fixed to the upper end and the lower end of the large-scale model through detachable force transmission plates, and the force transmission plates are connected with a force measuring balance; the large-scale model is provided with a pressure measuring hole, and the scale ratio of the large-scale model is greater than 1: 20; a wind pressure sensor is arranged in the data acquisition device, the data acquisition device is connected with the pressure measuring hole of the large-scale model through a pressure measuring pipe, and wind pressure is transmitted to the wind pressure sensor of the data acquisition device through the pressure measuring pipe. The large-scale model wind tunnel test device and the debugging method thereof are convenient and fast to install and flexible to adjust.

A true triaxial time-dependent dynamic disturbance test device for a deep-buried hard rock includes a rigid static load loading assembly and a rigid dynamic load loading assembly. The rigid static load loading assembly applies a static load to a rock test sample, and the rigid dynamic load loading assembly applies a disturbance stress to the rock test sample. Coupled application and control of a long time-dependent static force and a disturbance stress of the rock in a true triaxial disturbance stress state are achieved. The rigid dynamic load is provided with a disturbance rod in a loading direction, and a “point” disturbance mode is converted into a “face” disturbance mode through the disturbance rod, a disturbance hole and a test sample clamp, so that a disturbance mode more suitable for an actual working condition on site is provided while power consumption is reduced and time-dependent dynamic disturbance is achieved.

The invention provides an analog simulation test device for variable mining modes of a coal mine and a control method of the analog simulation test device. The analog simulation test device for the variable mining mode of the coal mine comprises a model framework; a drawing column; provided is a joint cutting piece. According to the analog simulation test device for the variable mining mode of the coal mine and the control method of the analog simulation test device, the states of the drawing column and the joint cutting piece can be controlled according to specific experiment requirements so as to adjust the position of a roadway, and then the roadway tunneling process, the working face advancing process and the coal seam thickness are simulated; the purpose of simulating different construction methods is achieved, the construction method which can be simulated by a two-dimensional geomechanical model test device in the prior art can be completed, drawing columns which are drawn in different directions can be arranged by utilizing the length and the width of the model frame, and then the mining conditions of all working faces of the whole piece are simulated. And the air transportation condition when a rock layer is overlying after the whole coal seam is completely mined is better simulated, so that the test effect and the test precision of the influence on coal mining are effectively improved.

The invention discloses an active anti-floating drainage model test device and test method considering saturation change, and belongs to the technical field of active anti-floating of buildings. The test device comprises a boundary model box, a building model box, a plurality of pore pressure sensors, a plurality of dielectric constant sensors, a pressure limiting drainage pipe for simulating active anti-floating equipment in an actual building, a water head control device and a rainfall simulation device, and can simulate a seepage field of an underground space under the condition of active anti-floating measures during rainfall. The drainage condition of the underground space under the condition is reproduced; the pore pressure sensor and the dielectric constant sensor monitor the saturation change of the soil body in real time, the vacancy of the existing test device in the saturation change factor of the soil body is filled up, the drainage condition of the active anti-floating measure and the seepage law of the soil body in the unsaturated-saturated transition process of the soil body under different rainfall and different stratum conditions can be demonstrated, and the test device has a wide application prospect. Scientific basis and data support are provided for optimization application of active anti-floating measures under different saturation working conditions.

The invention relates to a hydraulic tunnel model test device, and belongs to the technical field of pressure test devices in hydroelectric and hydraulic engineering. Multi-directional ground stress is applied through external oil cylinders, wherein the external oil cylinder on the upper portion applies vertical stress to a rock mass similar material layer; horizontal stress is applied through external oil cylinders on the left side and the right side; a clay layer is laid at the bottom, plastic deformation is generated under the action of vertical stress to form bottom ground stress from bottom to top, and full stress field simulation is achieved. The loading process is divided into two stages: firstly, ground stress loading is carried out, vertical stress and horizontal stress are sequentially applied, and a clay layer deforms to ensure bottom stress; and then internal and external water pressure loading is carried out, the external pressure controller simulates surrounding rock water pressure through the external loading membrane bag, and the internal pressure controller simulates water pressure in the tunnel through the internal loading membrane bag. According to the device, the complex stress environment of the deep-buried tunnel is truly simulated by accurately controlling the multidirectional ground stress and the internal and external water pressure, and a reliable test platform is provided for studying the stability of a lining structure.

The invention provides an inclined variable-angle aircraft interstage separation ground test device. The inclined variable-angle aircraft interstage separation ground test device comprises an aircraft separation device, an angle adjusting device, a temperature control and acquisition device, a vibration control and impact acquisition device, an ignition control device and a device base. The angle adjusting device comprises a device side plate, an arc groove, an angle ruler, a separation mechanism mounting plate, a supporting hinge, a supporting rod, an adjusting sliding rail, an adjusting base, a locking device, a device base gradienter, a rotating bearing and an auxiliary fixing block. The temperature control device comprises a quartz lamp array heating cage, an outer wall temperature control thermocouple and an inner wall temperature acquisition thermocouple, and can simulate a pneumatic heating environment at a separation moment, so that the thermal deformation matching capability of the separation mechanism in a high-temperature environment and the operation reliability of the separation mechanism are obtained. The vibration control and impact acquisition device is composed of a vibration table, a vibration control sensor and an impact sensor.

The invention relates to the technical field of electromagnetic compatibility testing, in particular to an electromagnetic compatibility testing device and method for the shaft current of a hub motor, and the device comprises a shielding chamber, a system master controller, a dynamometer, a hub motor tool and a testing system. A dynamometer, a hub motor tool and a test system are arranged in the shielding chamber; the hub motor tool is used for installing and fixing a hub motor to be tested. An output shaft is designed at the rotor end of the hub motor, and the hub motor is connected with the dynamometer through the output shaft. The test system is used for measuring the shaft current of the hub motor; the system master controller is used for controlling the wheel hub motor to operate under various working conditions and collecting shaft current under each working condition; and obtaining an electromagnetic compatibility test result according to the shaft current. The electromagnetic compatibility and reliability of the hub motor and the control system thereof can be improved.