An arresting test device and evaluation method for EMAS

Abstract

The present application relates to the technical field of performance testing of EMAS arresting materials in the aviation field, and discloses an arresting test device for EMAS, including arresting materials, wheels, guide rails for guiding the wheels to slide, and a pushing mechanism for pushing the wheels; a resistance sensor is installed on the wheels, and a counterweight and a vertical displacement sensor are also installed on the wheel fork; the experimental device also includes an anti-skid strip, the anti-skid strip is located above the guide rail, a buffer roller is installed on the anti-skid surface of the anti-skid strip, the buffer roller is connected to a connecting rod extending downward, and a driving rod is also installed on the mounting seat, the driving rod moves with the wheel and contacts the connecting rod, and the connecting rod links the buffer roller to slide along the anti-skid surface of the anti-skid strip. The present application can simulate the rolling process of the wheel on the arresting system in an actual environment, record experimental data, and perform data analysis on the resistance value and crushing depth of the wheel.

Description

Technical Field

[0001] The present application relates to the technical field of EMAS arresting material performance testing in the aviation field, and in particular to an EMAS arresting test device and evaluation method. Background Art

[0002] As modern society's requirements for safety and reliability continue to increase, the design and application of various experimental devices have become increasingly important. Arresting test devices are important tools for testing and evaluating the performance and reliability of various structures, materials and their components in practical applications. Especially in the fields of transportation, aerospace and industrial production, the role of arresting devices is particularly significant. Existing arresting test devices are mainly used to evaluate the performance of emergency braking, collision buffering and energy absorption.

[0003] EMAS (Engineered Material Arresting System) is an arresting system widely used at the end of aviation runways, designed to prevent major accidents when aircraft run off the runway. The design and evaluation of EMAS devices require special attention to the energy absorption characteristics of the material, the stability of the structure, and the performance of the system under different impact conditions. At present, the main technical principle of the specialized experimental device for EMAS is to make the wheels contact the upper surface of the platform body through the gravity of the weight-bearing clamping device and the wheels, and to use the traction device to pull the platform body, the arresting material and the wheels to produce relative movement, thereby simulating the crushing process of the aircraft landing gear on the arresting system.

[0004] Regarding the above-mentioned related technologies, in actual applications, the blocking material is stationary and the wheel slides along the blocking material, so the accuracy of the data of the wheel impacting the blocking material needs to be improved. Summary of the invention

[0005] In order to obtain more accurate data on wheel impact arresting materials, the present application provides an arresting test device and evaluation method for EMAS.

[0006] In the first aspect, the present application provides an EMAS arresting test device, which adopts the following technical solution:

[0007] An arresting test device for EMAS, comprising an arresting material, a wheel, a guide rail for guiding the wheel to slide, and a pushing mechanism for pushing the wheel;

[0008] The pushing mechanism includes a booster rod and an electromagnetic ejection device that drives the booster rod to launch, a resistance sensor is installed on the wheel, and a counterweight and a vertical displacement sensor are also installed on the wheel fork;

[0009] The wheel fork is connected to a mounting seat, a pulley is mounted on the mounting seat, and the pulley is slidably mounted on the guide rail. The guide rail includes a test section and a buffer section. The test section and the buffer section are connected and have the same length direction. The blocking material is located below the test section of the guide rail.

[0010] The experimental device also includes an anti-slip strip, which is located above the guide rail. A buffer roller is installed on the anti-slip surface of the anti-slip strip. The buffer roller is connected to a connecting rod extending downward. The connecting rod and the anti-slip strip are in sliding contact. The mounting seat is also equipped with a driving rod. The driving rod moves with the wheel and contacts the connecting rod. The connecting rod links the buffer roller to slide along the anti-slip surface of the anti-slip strip.

[0011] By adopting the above technical solution, the electromagnetic ejection device drives the booster rod to make the wheel slide at high speed on the guide rail to simulate the high-speed impact in the actual arresting process. The counterweight can simulate the actual static load-bearing of a single wheel under different loading conditions. The resistance sensor records the resistance value of the wheel. The installation of the vertical displacement sensor can record the vertical displacement of the wheel axle. The experimental process can simulate the rolling process of the wheel on the arresting system in the actual environment, and record the experimental data, and perform data analysis on the resistance value and crushing depth of the wheel.

[0012] The design of the experimental section and buffer section of the guide rail allows the wheel to gradually slow down after the experiment, avoiding damage to the entire experimental equipment due to sudden stop. When the wheel slides by inertia, the drive rod pushes the connecting rod to move. The linkage mechanism of the buffer roller and the connecting rod can increase the resistance of the wheel sliding, further enhancing the buffering effect and protecting the experimental device and the wheel from impact damage.

[0013] Optionally, the anti-slip strip includes a buffer portion and a reset portion, one end of the reset portion is connected to one end of the anti-slip strip, and the other end of the reset portion is connected to the other end of the anti-slip strip.

[0014] By adopting the above technical solution, the reset part and the buffer part are connected, so that the anti-slip strip is connected at both ends to form a ring structure. When the wheel is buffered and stopped, the buffer roller can return to the buffer part through the reset part to prepare for buffering for the next experiment.

[0015] Optionally, the middle portion of the reset portion and the buffer portion are parallel to each other, and both ends of the reset portion in the length direction are semicircular ring structures.

[0016] By adopting the above technical solution, the buffer part and the reset part of the anti-slip strip have different shapes, and the driving rod and the connecting rod cooperate. When the buffer roller slides to the connection between the buffer part and the reset part, it needs to change direction, but the wheel only has the inertia of moving forward, so the connection between the buffer part and the reset part can become the wheel stopping position, so that the wheel is stopped after the speed slows down during the buffering process.

[0017] Optionally, the guide rail is connected end to end to form a ring structure, and the guide rail also includes a reset section, the middle position of the reset section is parallel to the experimental section, and both ends of the reset section in the length direction are semicircular ring structures, one end of the reset section is connected to one end of the experimental section, and the other end of the reset section is connected to the buffer section.

[0018] By adopting the above technical solution, this design enables the experimental device to conduct multiple experiments continuously, and the same wheel does not need to be frequently disassembled and reinstalled, thereby improving the experimental efficiency; the design of the reset section allows the wheel to automatically reset to the starting position after the experiment is completed, which is convenient for rapid preparation for the next experiment. If the connection between the buffer part and the reset part of the anti-slip strip does not stop the wheel, the connection between the reset section and the buffer section can also play a stopping role when the wheel is still moving forward.

[0019] Optionally, the length of the buffer section of the guide rail is greater than the length of the buffer portion.

[0020] By adopting the above technical solution, the sliding distance of the wheel in the buffer section is increased, so that the wheel can be decelerated more fully, reducing the impact on the experimental device and the wheel. At the same time, it also provides a more sufficient time window for the collection of experimental data, improving the accuracy and reliability of the experimental data.

[0021] Optionally, the experimental device also includes a resistance component, the resistance component includes a first guide plate, the first guide plate is mounted on the mounting seat, the resistance component includes a resistance ball, the resistance ball is attached to the upper surface of the first guide plate, the first guide plate is provided with a slide groove, the resistance ball is extended with a connecting plate, the connecting plate extends out of the first guide plate through the slide groove, the connecting plate is rotatably connected with a buffer plate, the buffer section of the guide rail is fixedly installed with a block, the block is spaced apart and the buffer plate contacts the block as the wheel moves.

[0022] By adopting the above technical solution, after the resistance assembly passes through the cooperation of the first guide plate, the resistance ball and the buffer plate, when the buffer plate hits the block, if the buffer plate needs to pass through the block, the buffer plate needs to rotate so that the buffer plate can leave the block along with the movement of the wheel. If the impact force is large, the resistance ball will also rotate slightly. When the buffer plate leaves the block, the buffer plate automatically rotates downward to prepare for colliding with the next block. The collision between the buffer plate and the block can release the kinetic energy of the entire wheel and pulley during the sliding process, thereby increasing the buffering effect. The setting of the resistance ball on the first guide plate can also provide a certain resistance, which can achieve a buffering effect.

[0023] Optionally, the resistance assembly also includes a second guide plate, the second guide plate is connected to a limiting block, the driving rod is installed on the first guide plate, after the first guide plate contacts the limiting block, the second guide plate contacts the driving rod, and the resistance ball also contacts the second guide plate.

[0024] By adopting the above technical solution, this design reduces the shaking and deviation of the drag ball during the sliding process of the wheel, and improves the degree of drag of the drag assembly on the wheel. At the same time, the contact between the driving rod and the limit block ensures that the second guide plate contacts the driving rod at the appropriate time, achieving precise matching of the drag assembly.

[0025] In the second aspect, the present application provides an evaluation method for an EMAS arresting test device, which adopts the following technical solution:

[0026] An evaluation method for an EMAS arresting test device, according to the above-mentioned EMAS arresting test device, comprises the following steps:

[0027] Step 1: Move the pulley to the starting end of the test section of the guide rail, install the wheel required for the experiment on the wheel fork through the wheel axle, lay the arresting material required for the experiment on the ground; install a counterweight of a set weight on the wheel fork;

[0028] Step 2, setting the voltage and current of the electromagnetic catapult device to provide a predetermined initial velocity;

[0029] Step 3, start the sensor;

[0030] Step 4, start the electromagnetic catapult device and conduct the experiment; the aircraft wheel moves forward along the guide rail according to the speed set by the electromagnetic catapult device, crushes the arresting material, and collects the resistance value of the aircraft wheel measured by the sensor in real time;

[0031] Step 5, turn off the electromagnetic ejection equipment and sensors, and the experiment ends;

[0032] Step 6, performing data analysis on the resistance value of the wheel and the crushing depth of the arresting material;

[0033] Step 7, after the wheel test is completed, it slides into the buffer section due to inertia, the driving rod moves with the wheel and contacts the connecting rod, the connecting rod moves with the driving rod to drive the buffer roller to slide along the anti-slip surface, and the sliding speed of the pulley on the guide rail gradually decreases.

[0034] By adopting the above technical solution, this step ensures the correct installation and preparation of all components and materials before the experiment begins. Move the pulley to the starting end of the test section, install the wheel on the wheel fork, lay the arresting material in place, and install the counterweight of the set weight. These operations are the basis for the accuracy of the experiment. Through precise initial settings, the repeatability and reliability of the experimental results can be ensured; setting the voltage and current of the electromagnetic catapult equipment to provide a predetermined initial velocity for the wheel is a key step in simulating the high-speed impact during the actual arrest process. The accuracy of this step directly affects the moving speed of the wheel on the guide rail and the energy of hitting the arresting material, thereby determining the accuracy of the experimental results; starting the vertical displacement sensor to collect the resistance value of the wheel in the experiment in real time is an important means of obtaining experimental data; after starting the electromagnetic catapult equipment, the wheel moves along the guide rail at a predetermined speed to crush the arresting material. During this process, the interaction between the wheel and the arresting material simulated the actual arresting scenario, and the resistance sensor recorded the resistance value of the wheel in real time, providing direct data for evaluating the arresting effect. After the experiment, the wheel slid into the buffer section due to inertia, and gradually decelerated and finally stopped through the linkage mechanism of the drive rod, connecting rod and buffer roller. This buffering process not only protected the experimental device from impact damage, but also simulated the deceleration and stopping process of the wheel during the actual arresting process, providing an important reference for evaluating the overall effectiveness of the arresting system. At the same time, the wheel stopping at the end of the buffer section also facilitated the experimenters to conduct subsequent data collection and device inspection.

[0035] In summary, the present application includes at least one of the following beneficial effects:

[0036] 1. The experimental device can effectively simulate the high-speed impact and deceleration process in the actual arresting process through the ingenious design of the electromagnetic ejection equipment and the guide rail. At the same time, the guide rail and the anti-slip strip are connected end to end to form a ring structure, which enables the experimental device to conduct multiple experiments continuously, thus improving the experimental efficiency.

[0037] 2. The introduction of the drag component enables the experimental device to simulate the arresting effect under different resistances; this design improves the flexibility and applicability of the experiment and meets different experimental needs;

[0038] 3. Stability and safety are fully considered during the design and manufacturing process of the experimental device. The safety and reliability of the wheels and the experimental device are ensured during the experiment through the coordinated use of components such as buffer sections, buffer rollers, anti-slip strips, and the setting of safety devices such as resistance components and limit strips. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 is a three-dimensional diagram of the wheel of the embodiment of the present application being located at the starting position of the experimental section;

[0040] Figure 2is a side view of the wheel of the embodiment of the present application at the starting position of the test section;

[0041] Figure 3 yes Figure 2 Sectional view at AA;

[0042] Figure 4 is a cross-sectional view of an embodiment of the present application showing that the buffer roller is located on the anti-slip strip;

[0043] Figure 5 is a three-dimensional diagram of an embodiment of the present application in which the wheel is located at the starting position of the buffer section;

[0044] Figure 6 yes Figure 5 An enlarged schematic diagram of point B;

[0045] Figure 7 yes Figure 4 A magnified schematic diagram of point A;

[0046] Figure 8 It is a schematic diagram of the connection between the connecting rod and the second guide plate of an embodiment of the present application.

[0047] Description of reference numerals: 100, arresting material; 200, wheel; 210, wheel fork; 300, pushing mechanism; 310, electromagnetic ejection device; 320, booster rod; 400, mounting frame; 410, counterweight; 420, support rod; 430, cross bar; 440, mounting seat; 450, pulley; 460, driving rod; 500, guide rail; 510, guide groove; 521, test section; 522, buffer section; 5221, stopper; 523, Reset section; 600, anti-skid strip; 620, buffer part; 621, anti-skid surface; 630, reset part; 640, give way groove; 700, buffer roller; 710, roller body; 720, roller shaft; 730, connecting rod; 740, guide block; 741, protrusion; 800, resistance component; 810, first guide plate; 811, baffle; 820, resistance ball; 830, connecting plate; 840, buffer plate; 850, second guide plate; 860, limit block. DETAILED DESCRIPTION

[0048] The following is combined with Figure 1-8 This application is described in further detail.

[0049] The present application embodiment discloses an EMAS arresting test device. Figure 1An EMAS arresting test device includes an arresting material 100, a wheel 200, a pushing mechanism 300 for pushing the machine, and a guide rail 500 for guiding the wheel 200 to slide. The guide rail 500 is fixed on the ground through a support column. The arresting material 100 is located below the wheel 200. When the wheel 200 is pushed by the pushing mechanism 300, the wheel 200 slides along the length direction of the guide rail 500 and crushes the arresting material 100.

[0050] Reference Figure 2 and Figure 3 The pushing mechanism 300 includes an electromagnetic ejection device 310 and a booster rod 320. The ejection part of the electromagnetic ejection device 310 is connected to the booster rod 320. After the electromagnetic ejection device 310 sets the voltage and current, it pushes the wheel 200 through the booster rod 320, so that the wheel 200 crushes the blocking material 100 at a certain speed. A resistance sensor (not shown in the figure) is installed on the wheel 200. A mounting frame 400 is fixedly installed at the upper rod position of the wheel fork 210 of the wheel 200. A mounting box is fixedly installed on the mounting frame 400. A counterweight 410 and a vertical displacement sensor (not shown in the figure) are installed in the mounting box. The connection relationship between the electromagnetic ejection device 310 and the booster rod 320, and the sensors are all existing technologies, and this application does not make any improvements, so no further details are given.

[0051] The vertical displacement sensor can record the vertical displacement of the wheel axle of the wheel 200. The function of the counterweight 410 is to simulate the actual static load-bearing condition of a single wheel 200 of the aircraft under different loading conditions. The wheel 200 adopts the front wheel or main wheel of the aircraft. The blocking material 100 adopts ultra-light concrete material with a bulk density of 180~220kg / m3 and a collapse strength of 0.3~0.35MPa. Its collapse strength after 60d remains basically stable. When the wheel 200 is under load, when the wheel 200 contacts the blocking material 100, the blocking material 100 is crushed, simulating the crushing process of the aircraft landing gear on the arresting system in an actual environment.

[0052] Reference Figure 2 and Figure 3 Specifically, two support rods 420 are installed on the mounting frame 400 of the wheel 200, a cross bar 430 is connected between the support rods 420, a mounting seat 440 is installed on the cross bar 430, and two pulleys 450 are rotatably mounted on the mounting seat 440. The cross section of the guide rail 500 is an I-shaped, and the guide rail 500 has a guide groove 510 for the pulley 450 to slide, and two guide grooves 510 are arranged side by side, and the pulleys 450 and the guide grooves 510 correspond to each other one by one.

[0053] Reference Figure 2The guide rail 500 has an experimental section 521 and a buffer section 522. The experimental section 521 and the buffer section 522 have the same structure, except that the blocking material 100 is installed under the experimental section 521. When the wheel 200 enters the buffer section 522, the experiment is over. The experimental section 521 and the buffer section 522 are connected and have the same length direction. When the wheel 200 slides into the buffer section 522, the wheel 200 is in a state of inertial forward sliding, and there is a gap between the wheel 200 and the ground.

[0054] Reference Figure 1 In order to make the wheel 200 stop as quickly as possible, the experimental device also includes an anti-slip strip 600, a support frame for supporting the anti-slip strip 600, and the anti-slip strip 600 is fixedly installed on the support frame. The cross section of the anti-slip strip 600 is rectangular. The anti-slip strip 600 is located above the guide rail 500, and the upper surface of the anti-slip strip 600 is a ratchet-shaped anti-slip surface 621, and a buffer roller 700 slides on the anti-slip surface 621.

[0055] Reference Figure 4 The specific structure of the buffer roller 700 is a roller body 710 and a roller shaft 720, and the roller body 710 is rotatably mounted on the roller shaft 720. A bent connecting rod 730 is connected to one end of the roller shaft 720 of the buffer roller 700, and one end of the connecting rod 730 extends downward. The connecting rod 730 contacts the side wall and the lower surface of the anti-slip strip 600, and the cross-section of the connecting rod 730 is a rectangular structure, which increases the contact surface between the connecting rod 730 and the slide bar. A guide block 740 is connected to the other end of the roller shaft 720 of the buffer roller 700, and the guide block 740 contacts the other side of the anti-slip strip 600. The guide block 740 extends a protrusion 741, and the anti-slip strip 600 is also provided with a clearance groove 640 for the protrusion 741 to slide, and the clearance groove 640 extends along the length direction of the anti-slip strip 600. A driving rod 460 is installed on the mounting seat 440. The driving rod 460 extends upward. The upper end of the driving rod 460 is higher than the guide rail 500 and can contact the connecting rod 730 along with the movement of the pulley 450. The driving rod 460 can push the connecting rod 730, so that the buffer roller 700 slides on the anti-slip surface 621. The friction between the anti-slip surface 621 and the buffer roller 700 has a buffering effect on the wheel 200, so that the wheel 200 can gradually slow down.

[0056] Reference Figure 5 The anti-slip strip 600 is connected end to end to form a ring structure. The anti-slip strip 600 includes a buffer portion 620 and a reset portion 630. The buffer segment 522 is a straight segment. The middle portion of the reset portion 630 and the buffer portion 620 are parallel to each other. Both ends of the reset portion 630 in the length direction are semicircular ring structures. One end of the reset portion 630 is connected to one end of the anti-slip strip 600, and the other end of the reset portion 630 is connected to the other end of the anti-slip strip 600. The buffer portion 620 is provided with an anti-slip surface 621, and the upper surface of the reset portion 630 is a smooth surface.

[0057] The buffer part 620 is located above the buffer section 522 of the guide rail 500. The buffer roller 700 moves to the starting position end of the buffer part 620. After the wheel 200 enters the buffer section 522 of the guide rail 500, the driving rod 460 is linked with the buffer roller 700 through the connecting rod 730, so that the sliding of the buffer roller 700 has a buffering effect on the wheel 200. When the buffer roller 700 moves to the other end of the buffer part 620, the speed of the wheel 200 has been greatly reduced, and the buffer roller 700 cannot actively change direction to enter the reset part 630. The wheel 200 is stopped and no longer moves.

[0058] The ends of the guide rail 500 are also connected to form an annular structure. The guide rail 500 also includes a reset section 523. The cross section of the reset section 523 is the same as the cross section of the experimental section 521. The middle position of the reset section 523 is parallel to the experimental section 521. Both ends of the reset section 523 in the length direction are semicircular ring structures. One end of the reset section 523 is fixedly connected to one end of the experimental section 521, and the other end of the reset section 523 is fixedly connected to one end of the buffer section 522. The length of the buffer section 522 of the guide rail 500 is greater than the length of the buffer portion 620 of the anti-slip strip 600. The starting position of the buffer section 522 of the guide rail 500 is the same as the starting position of the buffer portion 620 of the anti-slip strip 600, or the starting position of the buffer section 522 is closer to the experimental section 521. The starting position of the buffer section 522 of the present embodiment is preferably closer to the experimental section 521. The end position of the buffer portion 620 is closer to the experimental section 521. The intersection of the buffer portion 620 and the reset portion 630 of the anti-slip strip 600 is the stopping point of the wheel 200. Only after the buffer roller 700 enters the reset portion 630 and the connecting rod 730 leaves the driving rod 460, can the wheel 200 continue to move to the reset section 523. The wheel 200 can return to the experimental section 521 along the reset section 523, simplifying the reset process of the entire experiment.

[0059] Reference Figure 6 The experimental device also includes a resistance component 800, which includes a first guide plate 810. The first guide plate 810 is an arc-shaped plate with an arc opening facing upward. The arc direction of the first guide plate 810 is the same as the length direction of the guide rail 500. The first guide plate 810 is fixedly mounted on the mounting seat 440 and is located above the guide rail 500. There is a gap between the lower surface of the first guide plate 810 and the upper surface of the guide rail 500. The resistance component 800 also includes a resistance ball 820. The lower surface of the resistance ball 820 is tangent to the upper surface of the first guide plate 810. The resistance ball 820 is located at the lowest point on the upper surface of the first guide plate 810.

[0060] Reference Figure 6 and Figure 7A connecting plate 830 extends from the lower surface of the resistance ball 820, and a sliding groove is provided on the first guide plate 810. The connecting plate 830 extends out of the first guide plate 810 through the sliding groove, and the sliding groove extends along the arc direction of the first guide plate 810. The connecting plate 830 is detachably connected to a buffer plate 840, and the buffer plate 840 and the connecting plate 830 are fixedly connected by bolts and nuts, and the buffer plate 840 rotates with the screw as the rotation center. Since the buffer plate 840 and the connecting plate 830 are detachably connected, the buffer plates 840 of different areas or weights can be replaced according to the sliding speed of the wheel 200 to achieve different buffering effects.

[0061] Reference Figure 5 and Figure 7 The guide rail 500 is fixedly provided with a stopper 5221 at the buffer section 522, and a plurality of stoppers 5221 are arranged at intervals. When the pulley 450 moves along the guide rail 500, the buffer plate 840 contacts the stopper 5221, and the buffer plate 840 rotates. When the buffer plate 840 leaves the stopper 5221, the buffer plate 840 rotates downward to a vertical state under the action of gravity, and is ready to continue to collide with and slide with the next stopper 5221. If the speed of the wheel 200 is very high, the drag ball 820 can also properly rotate along the slide groove with the stopper 5221 to improve the buffering effect.

[0062] Reference Figure 6 In order to make the resistance ball 820 rotate better about its own center of circle, two baffles 811 are fixedly connected to the upper surface of the first guide plate 810, and the resistance ball 820 and the baffle 811 are tangent to each other, so that when the buffer plate 840 quickly hits the block 5221 to release kinetic energy, if the buffer plate 840 has not had time to rotate, the resistance ball 820 and the buffer plate 840 form a whole and rotate appropriately, but the position of the resistance ball 820 remains unchanged, it can only be adjusted to better cooperate with the buffering of the buffer plate 840, and can also play a certain buffering role.

[0063] Reference Figure 8In order to allow the damping ball 820 to be stably located on the first guide plate 810 when the buffer plate 840 is hit, the damping assembly 800 also includes a second guide plate 850, and the damping ball 820 slides along and contacts the lower surface of the second guide plate 850. The second guide plate 850 is fixedly mounted on the lower end of the connecting rod 730. The driving rod 460 is indirectly in contact with the connecting rod 730 through the second guide plate 850. The second guide plate 850 and the first guide plate 810 have the same shape and size, and one end of the second guide plate 850 in the arc direction is fixedly connected to the limiting block 860. When the first guide plate 810 is located below the second guide plate 850, the first guide plate 810 contacts the limiting block 860, and the end of the second guide plate 850 away from the limiting block 860 contacts the driving rod 460. The provision of the second guide plate 850 can also enable the driving rod 460 to better cooperate with the connecting rod 730. When the wheel 200 stops, the sliding buffer roller 700 enters the reset portion 630 , and the buffer roller 700 takes the connecting rod 730 away from the driving rod 460 , and then the wheel 200 can return to the test section 521 along the buffer section 522 and the reset section 523 .

[0064] The implementation principle of the EMAS arresting experimental device in the embodiment of the present application is as follows:

[0065] The wheel 200 is slid to the starting position of the test section 521 of the guide rail 500, and the booster rod 320 is close to the support rod 420 of the wheel 200. The electromagnetic ejection device 310 can drive the booster rod 320 to push the wheel 200 into the experiment at any time. Before the experiment, the buffer roller 700 should also be at the starting position of the buffer part 620. The counterweight 410 with a set weight is installed on the wheel 200. The booster rod 320 pushes the wheel 200 to press the blocking material 100, which can simulate the load of the wheel 200 in the actual environment. The state of the crushing blocking material 100, the vertical displacement sensor records data, and after the wheel 200 leaves the blocking material 100, the resistance value of the wheel 200 and the crushing depth of the blocking material 100 are analyzed. After the wheel 200 enters the buffer section 522, the design of the buffer roller 700 and the resistance component 800 can increase the resistance of the wheel 200 sliding along the guide rail 500, thereby gradually reducing the speed of the wheel 200. Finally, the wheel 200 can be stopped and then manually pushed back to the starting position of the test section 521.

[0066] The present application also discloses an evaluation method for an EMAS arresting test device.

[0067] An evaluation method for an EMAS arresting test device, according to the above-mentioned EMAS arresting test device, comprises the following steps:

[0068] Step 1, move the pulley 450 to the starting end of the test section 521 of the guide rail 500, install the wheel 200 required for the experiment on the fork 210 through the wheel axle of the wheel 200, lay the blocking material required for the experiment on the ground; install the counterweight 410 of a set weight on the fork 210;

[0069] Step 2, setting the voltage and current of the electromagnetic ejection device 310 to provide a predetermined initial velocity;

[0070] Step 3, start the sensor;

[0071] Step 4, start the electromagnetic ejection device 310 to conduct an experiment; the wheel 200 moves forward along the guide rail 500 at a speed set by the electromagnetic ejection device 310 to crush the blocking material, and collect the resistance value of the wheel 200 measured by the sensor in real time;

[0072] Step 5, turn off the electromagnetic ejection device 310 and the sensor, and the experiment ends;

[0073] Step 6, performing data analysis on the resistance value of the wheel 200 and the crushing depth of the arresting material;

[0074] Step 7, after the experiment is finished, the wheel 200 slides into the buffer section 522 due to inertia, the driving rod 460 moves with the wheel 200 and contacts the connecting rod 730, the connecting rod 730 moves with the driving rod 460 to drive the buffer roller 700 to slide along the anti-slip surface 621, and the sliding speed of the pulley 450 on the guide rail 500 gradually decreases.

[0075] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An arresting test device for EMAS, characterized in that: It comprises a blocking material (100), a wheel (200), a guide rail (500) for guiding the wheel (200) to slide, and a pushing mechanism (300) for pushing the wheel (200); The propulsion mechanism (300) comprises a booster rod (320) and an electromagnetic ejection device (310) for driving the booster rod (320) to launch; a resistance sensor is installed on the wheel (200); and a counterweight (410) and a vertical displacement sensor are also installed on the wheel fork (210) of the wheel (200); The wheel fork (210) is connected to a mounting seat (440), a pulley (450) is mounted on the mounting seat (440), the pulley (450) is slidably mounted on a guide rail (500), the guide rail (500) comprises a test section (521) and a buffer section (522), the test section (521) and the buffer section (522) are connected and have the same length direction, and the blocking material (100) is located below the test section (521) of the guide rail (500); The experimental device also includes an anti-slip strip (600), the anti-slip strip (600) is located above the guide rail (500), a buffer roller (700) is installed on the anti-slip surface (621) of the anti-slip strip (600), the buffer roller (700) is connected to a connecting rod (730) extending downward, the connecting rod (730) and the anti-slip strip (600) are in sliding contact, the mounting seat (440) is also installed with a driving rod (460), the driving rod (460) moves with the wheel (200) and indirectly contacts the connecting rod (730), and the connecting rod (730) links the buffer roller (700) to slide along the anti-slip surface (621) of the anti-slip strip (600); The anti-slip strip (600) comprises a buffer portion (620) and a reset portion (630), one end of the reset portion (630) is connected to one end of the anti-slip strip (600), and the other end of the reset portion (630) is connected to the other end of the anti-slip strip (600); The middle portion of the resetting portion (630) and the buffer portion (620) are parallel to each other, and both ends of the resetting portion (630) in the length direction are semicircular ring structures; The guide rail (500) is connected end to end to form a ring structure, and the guide rail (500) further comprises a reset section (523), the middle portion of the reset section (523) and the experimental section (521) are parallel to each other, both ends of the reset section (523) in the length direction are semicircular ring structures, one end of the reset section (523) is connected to one end of the experimental section (521), and the other end of the reset section (523) is connected to the buffer section (522); The experimental device also includes a resistance component (800), the resistance component (800) includes a first guide plate (810), the first guide plate (810) is mounted on the mounting seat (440), the resistance component (800) includes a resistance ball (820), the resistance ball (820) is attached to the upper surface of the first guide plate (810), the first guide plate (810) is provided with a slide groove, the resistance ball (820) is extended with a connecting plate (830), the connecting plate (830) extends out of the first guide plate (810) through the slide groove, the connecting plate (830) is rotatably connected with a buffer plate (840), the buffer section (522) of the guide rail (500) is fixedly installed with a stopper (5221), a plurality of the stoppers (5221) are arranged at intervals, and the buffer plate (840) contacts the stopper (5221) as the wheel (200) moves; The resistance component (800) further comprises a second guide plate (850), the second guide plate (850) being connected to a limiting block (860), the driving rod (460) being mounted on the first guide plate (810), and after the first guide plate (810) and the limiting block (860) are in contact, the second guide plate (850) and the driving rod (460) are in contact, and the resistance ball (820) is also in contact with the second guide plate (850); two baffles (811) are fixedly connected to the upper surface of the first guide plate (810), and the resistance ball (820) and the baffles (811) are tangent to each other.

2. The EMAS arresting test device according to claim 1, characterized in that: The length of the buffer section (522) of the guide rail (500) is greater than the length of the buffer portion (620).

3. An evaluation method for an EMAS arresting test device, according to the EMAS arresting test device according to any one of claims 1-2, characterized in that: The following steps are included: Step 1, move the pulley (450) to the starting end of the test section (521) of the guide rail (500), install the machine wheel (200) required for the experiment on the wheel fork (210) through the wheel axle of the machine wheel (200), lay the blocking material required for the experiment on the ground; install the counterweight (410) of a set weight on the wheel fork (210); Step 2, setting the voltage and current of the electromagnetic ejection device (310) to provide a predetermined initial velocity; Step 3, start the sensor; Step 4, starting the electromagnetic ejection device (310) to conduct an experiment; the wheel (200) moves forward along the guide rail (500) at a speed set by the electromagnetic ejection device (310), crushes the arresting material, and collects the resistance value of the wheel (200) measured by the sensor in real time; Step 5, turn off the electromagnetic ejection device (310) and the sensor, and the experiment ends; Step 6, performing data analysis on the resistance value of the wheel (200) and the crushing depth of the arresting material; Step 7: After the experiment is completed, the wheel (200) slides into the buffer section (522) due to inertia, and the driving rod (460) moves with the wheel (200) and contacts the connecting rod (730). The connecting rod (730) drives the buffer roller (700) to slide along the anti-slip surface (621) along with the movement of the driving rod (460), and the sliding speed of the pulley (450) on the guide rail (500) gradually decreases.

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