88results about How to "The test data is real" patented technology

The invention provides a reconfigurable lead screw pair and guide rail pair accelerated life electro-hydraulic servo test bench which is characterized in that two lead screw bearing seats of a T-shaped table between two guide rail mounting tables on a base are provided with lead screws connected with a motor; guide rails on the guide rail mounting tables are matched with guide rail sliding blocks; guide rail sliding block backing plates on the guide rails, a grating bar reading head on one guide rail mounting table and nut bases on the nuts of the lead screws are connected with the bottom of a stressed sliding table; one side of the stressed sliding table is meshed with a gear at the end part of the output shaft of a magnetic powder brake through a gear rack; the other side face of the stressed sliding table is opposite to a force application wheel of a transverse loading mechanism; and the upper part of the stressed sliding table is opposite to a force application wheel of a vertical loading mechanism. The test bench provided by the invention can be used for realizing the accelerated life test of three-way dynamic loading of multiple types of lead screw pairs and guide rail pairs, collecting test data required for evaluating the residual lives and degradation mechanisms of the lead screw pairs and the guide rail pairs in real time, and providing more reliable test basis for the design and maintenance of the lead screw pairs and the guide rail pairs.

The invention discloses a testing system of cutting force and torque loading reliability of a numerical control turret power knife rest, which comprises a supporting part and a loading part. The supporting part comprises a numerical control turret power knife rest supporting part, a cutting force loading supporting part and a torque loading supporting part. The numerical control turret power knife rest supporting part is fixed at left side below a floor iron, and the torque loading supporting part is located at the right side below the floor iron. The loading part comprises a dynamic cutting force loading part, a cutting torque loading part and a loading bar. The dynamic cutting force loading part is connected with a rotating plate in the cutting force loading supporting part through a 2# sliding plate. The cutting torque loading part comprises an eddy current dynamometer and an elastic coupler. The eddy current dynamometer is installed on a 3# pedestal, the output end of the eddy current dynamometer is connected with the elastic coupler, the elastic coupler is connected with a right end key of the loading bar sleeved with a bearing loading unit, and the left end of the loading bar is fixedly connected with the right end of a power knife seat on the measured numerical control turret power knife rest.

The invention discloses a method for detecting usability of a complex system human-machine interface based on eye movement signals. The method includes the following steps of extracting task information of the complex system human-machine interface through an ecological interface method, integrating the extracted information into psychological experiment software according to different types of task design, collecting eye movement information of an operator through an eye tracking system, calculating and processing a processing detection index according to the eye movement information and completing the quality detection on usability sub-features, and detecting the quality of the usability of the human-machine interface by fusing the usability sub-features. A detection system comprises a human-machine interface task information extraction module, a user eye movement signal collection module, an eye movement signal processing module, a usability sub-feather detection module and a usability detection module. According to the method, the quality of the usability of the complex system human-machine interface is detected and the complex system human-machine interface is judged whether to meet the use requirement of people or not through the eye movement tracking technology, and the method has good instantaneity and high reliability.

The method discloses a load testing system and a testing method for stream media service. The testing system comprises a stream media server, at least one testing client and a testing management server; the stream media server is used for providing a stream media service, at least one testing client is used for launching an on-demand request of the stream media service to the stream media server according to a testing task and recording corresponding on-demand quality parameters when the stream media service is demanded, the testing management server is used for generating the testing task distributed to the testing client and acquiring the on-demand quality parameters of the testing client corresponding to the testing task and the performance log of the stream media server operation and acquiring a testing result of the stream media service through analyzing the on-demand quality parameters and the performance log. Through an SOAP communication protocol, the load testing system for stream media service and the testing method intensively configure the testing task, automatically complete self-testing and generate a testing report to realize the comprehensive testing carried out to the performance of the stream media server and have the advantages of accurate and real testing and wide testing occasions.

The invention relates to a rail vehicle operation performance testing device which comprises test platforms and degree-of-freedom excitation devices arranged on the test platforms and used for simulating different track situations. The test platforms are arranged below steering frames of a train to be tested, each degree-of-freedom excitation device comprises a vertical excitation device body and / or transverse excitation device body and / or longitudinal excitation device body, and weight balancing equipment is arranged in the train. Tests can be carried out on different rail vehicles in different rail distances, and if the testing device is used to the largest extent, testing capital can be saved and accuracy of a test result is guaranteed. Besides, the device can simulate different track curves, different slops, different track superelevations and the like according to actual situations so as to reach true track operation situations. Accordingly, actual operation situations of the vehicle to be tested in a real track can be simulated, so that curve passage capacity, vertical shock absorber performance and the flexibility coefficient are measured, real and effective test data are provided for train operation performance researches, and the method plays an important role in guaranteeing safe operation of high-speed railways.

The invention discloses a service life ground test method for an ion thruster. By using the ground test method, a ground service life test for the iron thruster can be performed for a long time. According to the ground test method, service life ground test equipment is built first of all, the performance of the ion thruster after working for a long time is tested on the basis of the simulation space condition of the test equipment, and accordingly actual results of the service life of the ion thruster can be obtained, and real and reliable test data are provided for evaluation of the service life and the reliability of the thruster. Main performance parameters of the ion thruster in the whole service life can be obtained through substantive tests in the test process, and the change rule of the performance parameters of the thruster along with accumulative working time is further obtained; the basis for long-service-life working and application of the ion thruster is provided, and essential data can be obtained for more effective acceleration tests of the iron thruster in future. The test method is effective and reliable, and the economic cost and the time cost of the service life test are greatly lowered.

The invention discloses a train body chassis fatigue strength test bed and a testing method. The test bed comprises a train body chassis (1) for the testing and an actuator (2) used for fixing the two ends of the chassis (1), wherein the other end of the actuator (2) is fixed on a counter-force base (3); the counter-force base (3) is fixed on the end part of a basin-shaped foundation (4); the chassis (1) is placed on a support device (5); the support device (5) is fixed on the two sides of the basin-shaped foundation (4); a six-freedom vibration excitation device (6) is arranged inside the basin-shaped foundation (4); a vertical loading device (7) and a dragging device (8) are fixed on the upper part of the six-freedom vibration excitation device (6); the other ends of both the vertical loading device (7) and the dragging device (8) are respectively connected with the chassis (1). The test bed can finish the fatigue strength test of one train body chassis or the fatigue strength test of two train body chassis, and is low in test cost, high in test efficiency, and more real and more reliable in test result.

The invention discloses a method for measuring the fracture toughness J<IC> of each micro area of a heat affected zone of a welded joint, which is applicable to measurement on fracture toughness of various welded joints. According to the method, by forming a V-shaped groove in a coarse grain zone or a fine grain zone in the welded heat affected zone on a three-point bending test sample, the direction of crack development is effectively controlled to ensure the crack development in the coarse grain zone or the fine grain zone in the heat affected zone, and thus the fracture toughness of the different micro areas in the heat affected zone of the welded joint can be measured. The method is simple, is low in cost, ensures real and reliable measurement results, and has great significance for evaluating the mechanical property of each micro area of the welding joint, confirming a weak section of the welded joint and studying the fracture toughness of the heat affected zone of the welded joint.

Disclosed are car body intensity fatigue and an airtight fatigue test stand. The car body intensity fatigue and the airtight fatigue test stand comprise a car body tested for a train, a longitudinal loading device, a vertical loading device and a plurality of shock excitation devices installed below the car body. The shock excitation devices are six degree of freedom shock excitation devices. The six degree of freedom shock excitation devices, the longitudinal loading device and the vertical loading device are installed in a pit through a vibration isolation device. Air vents of the car body are connected with an airtight device. The vibration isolation device specifically comprises a rectangular basin shaped base inner bottom is connected with base plates of the six degree of freedom shock excitation devices through a T-typed guiding rail. The longitudinal loading device and the vertical loading device are fixed on the upper surface of a side edge of the base. The side edge of the base is connected with a wall of the pit through a buffering rubber-metal pad. The lower surface of the base is connected with a step of the pit through an air spring. Intensity fatigue test can be carried out. Full-scale car body airtight fatigue test can be completed. The car body intensity fatigue and the airtight fatigue test stand are low in testing cost, high in testing efficiency, authentic and reliable in testing results. Influences towards the surrounding environment are small when the car body intensity fatigue and the airtight fatigue test stand are tested.

The invention relates to a rail vehicle curve passage capacity testing method which includes the following steps that (A) trains to be tested are placed on test platforms; (B) according to test requirements, weight balancing equipment with the corresponding weight is arranged in the trains so that bodies of the trains can meet a needed state requirement; (C) whether the two trains to be tested interfere with each other is detected in an initial state; (D) multiple vertical excitation devices and transverse excitation devices are controlled to move a certain distance in the vertical direction and the transverse direction by testing needed track line conditions, so that center lines of the four test platforms are not in the forwarding direction of the trains, and a curve and a superelevation of an actual line are simulated; (E) according to displacement values obtained through testing, a curve radius is obtained through conversion, whether the two trains to be tested interfere with each other in the monitoring process is detected, meanwhile, wheel rail transverse force Y and wheel rail vertical force Q of each wheel are recorded, and accordingly the curve passage capacity of the trains is analyzed. The method can simulate different line curve situations according to actual situations, is low in cost, high in efficiency, and capable of testing on different track situations and in different vehicle states.

The invention discloses a device for a control surface unfolding wind tunnel test of a free flight model, which comprises a flexible head, a flexible body, a folding rudder and an unfolding mechanism, wherein the unfolding mechanism comprises a push rod which is equipped with a round boss on the rear section, a front nut, a rear nut, a big spring and a small spring, a front end blind hole, a rear end blind hole and a middle through hole communicated with the two blind holes are disposed inside the flexible body, an installation groove used to install the folding rudder and a spindle installation hole are disposed in an flexible body wall of the rear end blind hole, the push rod passes through the middle through hole, the big spring is sleeved into the push rod from the front end and installed in the front end blind hole and then limited by the front nut and the bottom wall of the front blind hole, the small spring is sleeved into the push rod from the rear end and fixed on the round boss, a rudder plate of the folding rudder is installed in the installation groove by a spindle, the rear nut is connected on the push rod by threads on the rear side of the folding rudder, a chamfer is disposed on the front end of the rear nut, the top end of the chamber is contacted with a coordination face on the rear end of the folding rudder when the folding rubber is folded, and the flexible head is installed on the front end of the flexible body after installation of the unfolding mechanism. The device is simple in processing and convenient in installation.

The invention provides a safety testing system used for a reactor pressure vessel under a serious accident condition. The safety testing system comprises a heater and a containment vessel, wherein a lower end enclosure of the containment vessel is at a suspension state, an overflow tower is arranged below the containment vessel, a spherical end enclosure of the overflow tower is at a suspension state, a reservoir for storing cooling water is arranged below the overflow tower, the lower end enclosure of the whole containment vessel is soaked in the cooling water, the heater is arranged in the containment vessel and is used for evenly heating a melt in the containment vessel at the constant temperature or at the varied temperature, the melt is poured into the containment vessel through a pouring channel at the top part of the containment vessel, the cooling water in the overflow tower is heated and boiled under the action of high temperature of the melt, a boiling tank and a steam flow are formed in the overflow tower, the containment vessel and a pressure device are connected through a pipeline and a valve, a pair of gas supply devices are connected on the pressure device, and the pressures of the gas supply devices are adjusted by the pressure device. According to the safety testing system used for the reactor pressure vessel under the serious accident condition, the failure process of the containment vessel at the high temperature gradient under the serious accident condition is simulated, and the maximum pressure value allowed in the containment vessel is acquired.

The invention discloses a high-altitude satellite power control device accelerated life test system and method. The system comprises a high-temperature test chamber, a power control device, a solar battery array simulator, a storage battery pack simulator, an electronic load and a test process control computer, wherein the high-temperature test chamber is used for providing high-temperature environment required by a test; the power control device is put in the high-temperature test chamber, and is used for adjusting input current of the solar batter array simulator according to power requirement of the electronic load, and managing the charging / discharging of the storage battery pack simulator; the solar battery array simulator is used for simulating input power of a solar battery array ina light period; the storage battery pack simulator is used for realizing charging and discharging functions of a storage battery pack in an earth shadow period; and the electronic load is used for simulating on-satellite electricity loads. The method comprises the following steps of: 1) establishing an acceleration model; 2) carrying out electric performance test before acceleration; 3) carryingout a high-temperature life test; 4) carrying out electric performance test after the acceleration; and 5) analyzing the test result.

The invention discloses a protection device for a vehicle collision test and providing a traction protection device used for the vehicle collision test. The traction protection device has a simple structure and can be automatically separated from a traction steel rope when a test vehicle reaches a predetermined speed to ensure that the real collision process is completely simulated. With the adoption of the traction protection device, the technical problem of poor collision test data accuracy caused by the fact that the test vehicle can not simulate the real collision process in the prior art. The traction protection device comprises a bottom plate which synchronously moves with the traction steel rope, an opening suspending plate an opening of which faces the movement direction of the traction steel rope is arranged on the bottom plate, the opening is in a rotatable connection with a turning limiting block which is connected with a trigger mechanism, the trigger mechanism comprises a sliding block butting against the turning limiting block, the sliding block is connected in a sliding chute of the bottom plate in a sliding mode, the sliding chute is arranged outside the turning limiting block and extends along the movement direction of the traction steel rope, a baffle plate is in the rotatable connection on one side of the sliding chute, and the baffle plate corresponds to a trigger baffle block of a traction track.

The invention provides a geotechnical synthetic material straight shearing and drawing integrated testing device capable of exerting dynamic loads; the testing device comprises a base with a horizontal moving platform and a testing box body arranged on the horizontal moving platform; a geotechnical synthetic material sample is arranged in the testing box body; the testing device further comprisesa horizontal loading mechanism and a normal loading mechanism, and a control system, wherein the horizontal loading mechanism and the normal loading mechanism can output static loads or dynamic loads;and the control system is provided with a computer processing unit and a data monitoring terminal. According to the geotechnical synthetic material straight shearing and drawing integrated testing device capable of exerting dynamic loads, the static load or dynamic load is applied to the geotechnical synthetic material sample, and then selection can be carried out according to requirements in thetest process; and when the dynamic load is applied, the working conditions of the geotechnical synthetic material sample in the actual engineering using process can be simulated in the test process,so that the measured test data can reflect the data of the geotechnical synthetic material in the actual project more truly, and the test effect is improved.

The invention relates to a full-scale derailing principle test stand with a steering frame operating on rails. Tractor guide rails are arranged outside railway rails and matched with wheels of a tractor, the steering frame is arranged in the tractor, and the front and the back of the steering frame are connected with the tractor through steel ropes; a drive device in front of the railway rails is connected with the front end of the tractor through steel ropes; cylinder rods of a front transverse electric cylinder and a back transverse electric cylinder at the left side of the tractor are respectively connected with a front axle casting and a back axle casing at the left side of the steering frame through respective transverse steel ropes; and cylinder rods of a left longitudinal electric cylinder and a right longitudinal electric cylinder at the front of the tractor are respectively connected with a framework of the steering frame through respective longitudinal cylinder rods. The test stand can freely regulate and change test parameters, can be used for researching extreme working conditions of derailing of the tractor, can really reflect the actual wheel and rail interaction characteristics, has the advantages of short test period and low cost, and has important significance on safety operation of high-speed and heavy haul railways and the like.

The invention discloses a strain-control continuous-loading consolidometer for measuring a compressibility index of soil body, and mainly solves a problem that there is no proper measurement instrument for strain-control continuous-loading consolidation test methods and fills a gap in the field in our country. The consolidometer may be an acceptable scheme for popularizing strain-control consolidation test. Meanwhile, the consolidometer achieves full-automatic control of the test process, standardizes detection steps, reduces labor intensity of test operators and greatly improves test efficiency. The strain-control continuous-loading consolidometer is mainly composed of: a monitoring computer, a collection controller, a sensor, a consolidometer main machine, and data connection lines, etc., wherein software on the monitoring computer is used for setting test parameters, instrument control parameters and processing data, etc. The collection controller, as a brain of the whole system, isused for collecting data from the sensor and sending a control signal to the consolidometer main machine, and also controlling every step in the whole test process.

The invention relates to the field of performing dynamic debugging testing on the railway locomotive vehicle bogie, and in particular relates to a railway vehicle bogie dynamic debugging test bed. Through the arrangement of a bogie for test, a force application frame for restraining the bogie, actuators, a steel frame for fixing the actuators, a foundation block, a guide rail laid on the foundation block, rubber springs for the vibration isolation of the foundation block, transmission devices, an environmental simulation device, a pair of thin oil stations, a rail, fans, a foundation, and a reinforced beam, the braking test, the adhesion test, the dynamic performance and tread abrasion test of the bogie can be performed.

The invention relates to a self-propelled traction ship model control and measurement method, which is characterized by setting navigation acceleration, speed and stroke and the like of a ship model by utilizing a computer editing instruction; then, transmitting the information to a driving motor on a ship model tractor through lines to control the ship model tractor to drag the ship model to operate and monitoring the ship attitude through a measurement device; and determining various technical indexes, such as ship rinsing and sinking amount, water surface fluctuation, ship safety surplus, section modulus, channel surface fluctuation and ship speed in and out of a ship compartment in the prototype. The method has simple operation, and stable operation; and the measured data has the advantages of high real-time performance, high precision and good fitting effect with the prototype.

The invention discloses a finite element simulating and testing system and method of a bamboo winding vehicle body. The simulating and testing system comprises a vehicle body structure finite element model module, a vehicle body structure condition setting module and a simulating and testing module. The vehicle body structure finite element model module firstly establishes finite element models of a vehicle frame and a vehicle shell, sets the fixed connection mode of the bottom face of the vehicle shell and the bottom face of the vehicle frame, sets the unit numbers, the joint numbers and the unit types of all parts of the finite element models of the vehicle frame and the vehicle shell, and sets the materials of the vehicle frame, end plates and the vehicle shell. The vehicle body structure condition setting module sets bamboo winding vehicle body boundary constraint conditions and loads. The simulating and testing module executes simulating and testing according to two stages. By means of the system and method, a large number of true and effective test data is accumulated, and advantageous data support is provided for reliability design, production and use of a novel vehicle.

The invention discloses a pavement water penetration dynamic testing device and testing method. The testing device comprises a vacuum pump, a vacuum pumping tube and a bearing container, an asphalt sample is placed in the bearing container, and a wheel rolling device and a sealing device are arranged on the upper portion of the asphalt sample. The vacuum pump is arranged in the testing device to simulate the pumping action of the bottom of the asphalt sample, the wheel rolling device is arranged on the upper portion of the asphalt sample to simulate actual force of a vehicle on the asphalt sample when the vehicle passes a pavement, and an electric heating element and a wedge-shaped component are arranged on the lower portion of the sealing device, a test area can be effectively sealed. Bythe aid of the means, water penetration conditions of the asphalt pavement can be really simulated when the vehicle runs the asphalt pavement, and realer test data can be acquired.

The invention discloses an acoustic part-grade sound insulation testing wall for an automobile. The acoustic part-grade sound insulation testing wall is installed between a reverberation chamber and an anechoic chamber and comprises an outer frame. The outer frame comprises a front-and-back-through cavity, an automobile body is fixed into the cavity through a support, light bricks are sealed to the front side and the back side of the automobile body respectively, the portion between the light bricks is filled with sound absorbing materials, and two forklift holes are formed in the lower portion of the outer frame. According to the acoustic part-grade sound insulation testing wall, as labor is replaced with a special device, direction operation of a worker can be avoided as far as possible, labor hours and labor are saved, and safety is better improved; as the device can be recycled, waste of materials can be greatly reduced; as the structure of a wall body and the structure of a sound insulation wall are adopted in cooperation with a fixing block and a nut, the installed stability can be improved; as a large quantity of light sound insulation materials are used, the sound insulation performance of the wall body can be improved while the self weight of the sound insulation wall is greatly reduced, and tested data are more real.

The invention relates to a high-frequency impact test stand for a train bogie. The high-frequency impact test stand for the train bogie is characterized by comprising the train bogie (1) used for testing and a trundle set (2), the trundle set (2) is arranged at the lower portion of the train bogie (1), rotates at a high speed, and is fixed in concave pits of a concave foundation (4) through trundle set supports (3), one end of the trundle set (2) is connected with a gearbox (5), the other end of the gearbox (5) is connected with a motor (6), the trundle set (2) rotating at a high speed, the trundle set supports (3), the gearbox (5) and the motor (6) are installed in the concave pits of the concave foundation (4), and the train bogie (1) is placed above the trundle set (2) and the concave foundation (4). The train bogie fixing mode is the same as the restraining mode of a real line train running mode, and test stress and restraint authenticity is ensured.

The invention discloses a method for testing the bending property parameter of an S-shaped test piece material. The method comprises the following steps: determining a structural size; dividing the S-shaped test piece material into a starting straight line segment, a starting bent segment, an intermediate straight segment, an end bent segment and an end straight segment; bending the starting bentsegment and the end bent segment in different directions; measuring the length of every straight line segment and the bending angle and the bending radius of every bent segment; calculating an actualdeveloped length TL0; performing secondary bending on the starting bent segment and the end bent segment, and carrying out reverse secondary bending on the end bent segment; measuring the length MLS of the starting straight segment, the length MLM of the intermediate straight segment, the length MLE of the end straight segment, the radius MRS of the starting bent segment, the radius of the end bent segment MRE, the bending angle MAS of the starting bent segment and the bending angle MAE of the end bent segment after the secondary bending; calculating a secondary actual developed length ML0 ofthe test piece; and calculating the bending property parameter. The material in every batch does not need to be tested and simulated, so the cost is greatly reduced, and the period is shortened.

The invention discloses a device for a control surface unfolding wind tunnel test of a free flight model, which comprises a flexible head, a flexible body, a folding rudder and an unfolding mechanism, wherein the unfolding mechanism comprises a push rod which is equipped with a round boss on the rear section, a front nut, a rear nut, a big spring and a small spring, a front end blind hole, a rear end blind hole and a middle through hole communicated with the two blind holes are disposed inside the flexible body, an installation groove used to install the folding rudder and a spindle installation hole are disposed in an flexible body wall of the rear end blind hole, the push rod passes through the middle through hole, the big spring is sleeved into the push rod from the front end and installed in the front end blind hole and then limited by the front nut and the bottom wall of the front blind hole, the small spring is sleeved into the push rod from the rear end and fixed on the round boss, a rudder plate of the folding rudder is installed in the installation groove by a spindle, the rear nut is connected on the push rod by threads on the rear side of the folding rudder, a chamfer is disposed on the front end of the rear nut, the top end of the chamber is contacted with a coordination face on the rear end of the folding rudder when the folding rubber is folded, and the flexible head is installed on the front end of the flexible body after installation of the unfolding mechanism. The device is simple in processing and convenient in installation.

The invention relates to the research field of animal limb movement function and footprint analysis, and discloses a test device for analyzing the animal limb movement function and the footprint. The test device comprises tracks and soft ceramic layers applied on the bottom plates of the tracks, wherein the tracks consist of a straight flat segment, a turning segment, an upslope segment, a downslope segment and an upper step or lower step segment; lateral plates are arranged on both sides of the tracks; the lateral plates and the bottom plates are detachable; and particularly, the lateral plates can be made of one-way transparent glass to facilitate observation or photographing.

The invention discloses a hanging type single track vehicle rolling vibration test device. The hanging type single track vehicle rolling vibration test device comprises a single track vehicle, the single track vehicle comprises a vehicle body and a bogie, the vehicle body is arranged on the bogie through a shock absorber, the bogie is movably arranged in a track beam, a plurality of vertical actuators are symmetrically arranged above the track beam, two symmetric transverse actuators are transversely and separately arranged on the two sides of the track beam, and two longitudinal actuators aresymmetrically and separately arranged at two ends of the track beam. Caterpillar band conveyor belts are arranged on the two sides of the lower surface of the side surfaces of the track beam, a plurality of walking wheels are movably arranged on the caterpillar band conveyor belts of the lower surface of the track beam, and a plurality of guide pulleys are movably arranged on the caterpillar bandconveyor belts of the side surfaces. According to the hanging type single track vehicle rolling vibration test device, through the combination of the actuators in a plurality of directions, meanwhile, shock excitation is carried out on the track beam in the various directions, the operating state of a hanging type single track vehicle is effectively simulated, and the problems that the test device cannot effectively simulate vehicle operating state, cannot simulate test working condition as much as possible, and the cost is higher are solved.

The invention relates to a train impact model testing device. The train impact model testing device is characterized in that the central part of a table board is provided with an I-shaped steel bar for simulating a rail, and a train formation model is installed on the I-shaped steel bar; two sides of the front part of the train formation model are provided with wing plates, and impact cylinders are fixed on the table board right behind the wing plates; the impact cylinders are connected with an air compressor; an angle-adjustable rigid baffle plate which simulates the tunnel side wall is arranged on the table board in front of the train formation model, and the rigid baffle plate is provided with a force transducer; and two laser emitters are installed on the table board at one side of the front part of the I-shaped steel bar, and two laser inductors are correspondingly installed on the table board at the other side. The train impact model testing device can simulate the impact of the train formation to the tunnel side wall at different speeds and different impact angles, the impact force generated when the train derails and impacts a tunnel is obtained, a more accurate and reliable test basis can be provided for the anti-impact design and construction of the tunnel, and therefore the case that the train derails and impacts the tunnel, the tunnel is severely damaged, and secondary disasters such as flood disasters are induced can be avoided, and injuries, deaths and loss caused by accidents can be reduced.

The invention discloses a test device used for field simulation of engineering accumulation body water and soil loss. The test device comprises a cone-shaped accumulation platform and a support frame; the surface of the cone-shaped accumulation platform is provided with ridge shaped projections; the cone-shaped accumulation platform is divided into 2 to 4 accumulation zones; stepped passages are arranged between each pair of adjacent accumulation zones; each accumulation zone is provided with a seepage water collection system and a runoff water collection system; the support frame is arranged on the lower part of the cone-shaped accumulation platform, and is used for supporting the cone-shaped accumulation platform; a test working chamber is formed by the space between the lower part of the cone-shaped accumulation platform and the support frame; the side surface of the support frame is provided with water outlets. The test device is firm in structure, can be used for a plurality of accumulation body water and soil loss tests of same or different substances at the same time, is capable of stimulating field engineering accumulation body on-site environment, and satisfying field long-term observation requirements; the obtained test data is more truthful; foundation data is provided for scientific prevention of disasters such as man-made water and soil loss, and landslide caused by engineering accumulation body; and destroy of engineering accumulation body on the biological environment is eliminated.