30-ton super-large concrete load inverse trajectory rocket sled test method

Abstract

The invention relates to a 30-ton super-large concrete load inverse trajectory rocket sled test method, which is easy to realize engineering. Comprising the following steps: (1) according to the boundary dimension and angle requirements of a concrete target, designing a rocket sled structure appearance suitable for 30-ton concrete load; (2) a cladding plate is designed, and embedded screws are arranged on the cladding plate in an array mode to achieve integrated design of concrete and the cladding plate; (3) calculating the model and number of rocket engines according to the quality and speed requirements of the designed mounting platform, and designing and manufacturing a rocket sled body; (4) pouring 30-ton concrete load and mounting the concrete load on the sledge body; (5) arranging a warhead at the end point of the track; (6) arranging ground test equipment before the test; (7) the rocket engine is ignited after test conditions are met, and the target impacts the warhead after the engine is combusted and reaches a preset speed; and (8) reading data of the rocket sled space-time position test equipment, the speed test equipment, the high-speed video test equipment and the vibration test equipment.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of military target range test, and mainly relates to a super-large concrete load reverse trajectory rocket sled test technology, in particular to a 30-ton super-large concrete load reverse trajectory rocket sled test method. BACKGROUND

[0002] Modern war aims to attack ground / semi-underground / underground high-value hard targets, and typical high-value hard targets are ground buildings, bridges, airport runways, underground hangars, command centers, etc. Hard target penetrating ammunition such as earth-penetrating bombs is an important means to attack such high-value hard targets, and hard target penetrating fuzes are the core components of penetrating ammunition to achieve efficient damage. In view of different structures and forms of various high-value targets, the hard target fuze uses the acceleration sensor installed therein as an environmental information sensitive element to perceive the deceleration of the projectile from the target resistance during the process of colliding with, penetrating into, and penetrating through the hard target. The fuze identifies the process of the projectile penetrating the target and the position relative to the target in real time according to the environmental information, completes the task of optimal burst point identification and initiation control, and controls the warhead to explode at the optimal burst point to achieve efficient damage to the target. Accurate acquisition of the overload characteristics during the process of penetrating the hard target is the basis of damage control, and the rocket sled test can provide a reverse trajectory test method for the warhead to penetrate a 30-ton super-large concrete load, test and acquire high-precision overload data during the penetration process, and provide a ground dynamic verification means for the warhead to penetrate the overload data of the hard target.

[0003] The rocket sled test is a ground test system for simulating the speed and acceleration of aircraft, missiles and other aerospace vehicles, and its greatest feature is that it is not limited by the mass and size of the tested deceleration device, and is a simulation test system that connects the laboratory test and the flight test. It is powered by a rocket engine, slides along a specially built slide rail at high speed, and can simulate the process of penetrating the target, and is a key test system for solving the performance and function of aircraft, missiles and other aerospace vehicles and their components. For the 30-ton super-large concrete load reverse trajectory rocket sled test, the greatest advantage is that the warhead is in a static state and does not need to withstand the harsh vibration and impact environment during the operation of the rocket sled. From the point of view of stress wave propagation, when the projectile vertically impacts the static target plate at a certain speed and the target plate vertically impacts the static projectile at the same speed, their force and deformation processes should be consistent. The attitude of the warhead can be adjusted in advance to accurately control the attitude of the projectile-target intersection. In addition, sensors and other test equipment can be installed on the projectile body and connected to the acquisition equipment to obtain a large amount of high-resolution test data. SUMMARY

[0004] The application aims to provide a 30-ton super-large concrete load reverse trajectory rocket sled test method based on a rocket sled test platform, which uses a high-speed target to impact a static warhead to simulate the warhead penetration process of a hard target, and obtains a large amount of high-resolution test data through sensors and other test equipment installed on the projectile body, thereby providing test data support for simulation analysis and actual combat.

[0005] The application is realized by the following technical solutions.

[0006] A 30-ton super-large concrete load reverse trajectory rocket sled test method, wherein a 30-ton super-large concrete load is loaded at the front end of a rocket sled, the rocket sled is accelerated to a predetermined speed range under the thrust of a rocket engine, and a static warhead at the end of a track is impacted to simulate the warhead penetration process of a hard target by a reverse trajectory method.

[0007] (1) According to the shape size and angle requirements of the concrete target, a long-span split pressure rocket sled structure shape suitable for the 30-ton concrete load is designed;

[0008] (2) A cladding plate is designed, and embedded screws are arranged on the cladding plate to realize the integration design of the concrete and the cladding plate;

[0009] (3) According to the mass and speed requirements of the designed installation platform, the type and number of rocket engines are calculated and selected, and the rocket sled body is designed and manufactured, which is generally divided into a two-stage target load sled and a one-stage sled engine thrust sled, and the two sled bodies are connected through a thrust transmission device;

[0010] (4) The 30-ton concrete load is poured and installed on the sled body;

[0011] (5) The warhead is arranged at the end of the track;

[0012] (6) The ground test equipment is arranged before the test, including the rocket sled space-time position test equipment, the speed test equipment and the high-speed video test equipment;

[0013] (7) After the test conditions are met, the rocket engine is ignited, the rocket sled is launched, and the target impacts the warhead after the engine is burned out and reaches the predetermined speed;

[0014] (8) The data of the rocket sled space-time position test equipment, the speed test equipment, the high-speed video test equipment and the vibration test equipment are read.

[0015] The implementation of the present application also lies in that, in step (1), in order to ensure the safety of the large mass test product and the sled body to the track during the operation of the rocket sled, the distribution of the sliding shoe is optimized in the structural design, and a pressure distribution support structure is designed, so that the force on a single buckle point of the track is reasonable, the reaction force of the sliding shoe is ensured to be less than the bearing capacity of the slide rail, and the key index requirements such as the downward pressure, upward pulling force and material allowable stress range that can be borne by the track are met, so that the design of the 30-ton concrete load installation and test platform is reasonable.

[0016] The implementation of the present application also lies in that, in step (1), the specific steps for designing the embedded long-span pressure distribution rocket sled structure shape suitable for 30-ton concrete load are as follows:

[0017] a) According to the ballistic design and aerodynamic force estimation, the preliminary shape of the test platform is obtained, the appropriate material is selected, and the large load target installation platform structure and connection interface design are carried out;

[0018] b) The rationality of the installation platform structure and the connection interface design is preliminarily determined through quasi-static strength analysis, and the design is optimized according to the analysis results until the strength analysis result meets the design requirements;

[0019] c) The aerodynamic layout analysis is carried out, the embedded long-span pressure distribution structure shape suitable for super-tonnage concrete load is designed, and the dynamics calculation of the whole system is carried out, the matching of the large load target and the pressure distribution structure is analyzed, the stress of the rocket sled structure is controlled within the material allowable stress range, the sliding shoe layout is optimized, the reaction force of the rocket sled shoe rail is less than the bearing capacity of the slide rail, and through the cross-iteration analysis of aerodynamics, dynamics and statics, the vibration dynamics environment of the rocket sled system is finally reduced.

[0020] The implementation of the present application also lies in that, in step (2), the size and mass of the test product carried are much larger than those of the conventional rocket sled test product, and the conventional ring clamp cannot be used to fix the target, through the target characteristic analysis, a screw rod is pre-buried in the target, an arc plate with the same diameter is coated outside, the screw rod is linked with the arc plate, and the two sides are connected with the support structure, so that the integration of the target and the sled is realized.

[0021] The implementation of the present application also lies in that, in step (3), in order to ensure the impact speed, a two-stage engine propulsion method is adopted, eight sliding shoes are matched with the slide rail, a thrust rod is used for force transmission between the second-stage sled and the first-stage sled, the thrust rod is divided into two parts, the front transmission cylinder is located at the rear end of the second-stage sled engine and connected with the rear thread of the engine, and the rear transmission cylinder is located at the front end of the first-stage sled engine and connected with the head of the engine.

[0022] The implementation of the present application also lies in that, in step (3), the specific requirements are as follows:

[0023] a) The second-stage sled is connected and fixed with the sled through the pre-buried screw rod;

[0024] b) The target is connected with the lower steel plate through the form of pre-embedded screw rod, and the semicircular steel plate is connected with the target as a whole target, and high-strength integral beam structures are designed on both sides for cooperation with the target;

[0025] c) The main bearing structure on both sides of the target adopts a high-strength integral beam in a groove type, and the shape is a groove type structure, the target is embedded in the groove, and both ends are raised to ensure the front and rear limiting of the target and increase the overall rigidity, and a long hole is opened at the contact position of the beam and the target to increase the welding area of the beam and the target and guarantee the welding strength;

[0026] d) The first sled is combined by a thrust device, a beam shoe, a seven-link ring and a pipe welding, and is fixed on the first sled by four clamping rings.

[0027] The implementation of the present application also lies in that in step (5), the warhead is hoisted on the hanger by using a rope, and the hanger is installed to ensure that the test bomb axis is coincident with the center line of the sled target, and the sled target surface collides with the test bomb when the first three slide shoes of the sled slide out of the track.

[0028] The implementation of the present application also lies in that in step (6), the space-time position test equipment is generally arranged on the slide rail to test the space-time position of the rocket sled during the test process; the on-off target speed test equipment is generally used to test the speed at the end of the track; the photoelectric theodolite test equipment is generally used to test the whole process of the rocket sled; and the ground high-speed video penetration target process is generally tested.

[0029] The implementation of the present application also lies in that in step (6), the space-time position test equipment, the speed test equipment and the high-speed video test equipment are tested outside the slide rail, and the test equipment is arranged in a safety shelter.

[0030] The implementation of the present application also lies in that in step (6), all the test equipment has a unified time zero point.

[0031] Compared with the prior art, the present application has the following advantages:

[0032] 1. The target inverse trajectory method is adopted, sensors are arranged on the static warhead, and a large amount of high-resolution data is obtained through the wired connection of the recorder.

[0033] 2. By analyzing the matching of the large load target and the pressure distribution structure, the stress of the rocket sled structure is controlled within the material allowable stress range, the layout of the slide shoe is optimized, the rocket sled shoe track support reaction force is less than the bearing capacity of the slide rail, and the 30-ton concrete load 300m / s speed rocket sled test blank is filled.

[0034] 3. The target is designed with internal pre-embedded screw rod, external cladding arc plate and other structures, and the material is ordinary and easy to realize engineering. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 is 30 tons of large concrete load structure diagram;

[0036] Figure 2 Rocket sled test system composition schematic diagram;

[0037] Wherein: 1 - two level load sled, 2 - first thrust sled

[0038] Figure 3 is the end of the track terminal warhead layout diagram. DETAILED DESCRIPTION

[0039] The present application is a kind of super large concrete load inverse trajectory rocket sled test, the present application is further described in detail below with reference to the drawings. Test method includes the following steps:

[0040] Step 1, according to the shape and angle requirements of the concrete target, design the embedded long-span pressure distribution rocket sled structure shape suitable for 30 tons of concrete load. Referring to Figure 1 The specific requirements are:

[0041] a) according to the trajectory design and aerodynamic force estimation, obtain the preliminary shape of the test platform, select the appropriate material, and design the large load target installation platform structure and connection interface;

[0042] b) through the quasi-static strength analysis, the rationality of the installation platform structure and the connection interface design is preliminarily determined, and the optimization design is carried out according to the analysis results, until the strength analysis result meets the design requirements;

[0043] c) carry out aerodynamic layout analysis, design the embedded long-span pressure distribution structure shape suitable for super large tonnage concrete load, and carry out dynamics calculation on the whole system, analyze the matching of large load target and pressure distribution structure, control the stress of rocket sled structure within the allowable stress range of material, optimize the layout of the shoe, make the rocket sled shoe rail support reaction force less than the carrying capacity of the slide rail, through the cross iteration analysis of aerodynamics, dynamics and statics, finally reduce the vibration dynamics environment of the rocket sled system;

[0044] Step 2, design the cladding plate, and array type arrange the embedded screw rod on the cladding plate to realize the integrity design of the concrete and the cladding plate. The specific requirements are:

[0045] The concrete target cannot be directly connected with the outer support structure, the intermediate cladding plate is added, and the embedded screw rod is arrayed on the cladding plate to realize the integrity design of the concrete and the cladding plate, the cladding plate extends forward and backward to the target sled car, and the rigidity and strength of the whole assembly are increased. By designing rectangular long holes and threaded holes on the cladding plate, the cladding plate is connected with the outer support structure, and the integrity and fusion design of the target and the outer support structure is completed.

[0046] Step 3: Calculate the type and number of rocket engines according to the designed installation platform quality and speed requirements, design and manufacture the rocket sled body, which is generally divided into a two-stage target load sled 1 and a one-stage sled engine thrust sled 2. The two sled bodies are connected through a thrust transmission device. See Figure 2 . Specifically, it is required that:

[0047] a) The two-stage sled is matched with the track through 14 sliding shoes, and the total length of the sled body is about 8m. The front part of the sled body loads the target, which is fixed through the embedded screw rod and the sled car. The rear part of the sled body loads 7 DHS-051D type engines.

[0048] b) The target is threadedly connected with the lower steel plate in the form of an embedded screw rod. The embedded M24 screw rod connects the 30mm thick semicircular steel plate with the target as a whole. High-strength integral beam structures are designed on both sides for matching with the target.

[0049] c) The main load-bearing structure on both sides of the target adopts a high-strength integral beam with a groove shape, which is embedded in the groove with the target raised at both ends to ensure the front and rear positioning of the target and increase the overall stiffness. Longitudinal holes are opened at the contact position of the beam and the target to increase the welding area of the beam and the target and ensure the welding strength.

[0050] d) The one-stage sled is installed with 7 DHS-051D type rocket engines, which are matched with the sliding rail through eight sliding shoes. It is mainly composed of a thrust device, a beam-shoe combination, a seven-link ring and a rectangular tube welded together and fixed on the one-stage sled through four clamping rings.

[0051] e) The force transmission between the two-stage sled and the one-stage sled is achieved by a thrust rod, which is divided into two parts. The front transmission cylinder is connected with the rear thread of the engine at the rear end of the two-stage engine, and the rear transmission cylinder is connected with the head of the engine at the front end of the one-stage engine.

[0052] Step 4: Pour 30 tons of concrete load and install it on the sled body.

[0053] Step 5: Arrange the warhead at the end of the track. See Figure 3 . Specifically, it is required that:

[0054] a) The hanger is stably placed on a soil base platform with dimensions of 11000mm x 6800mm x 1200mm.

[0055] b) The warhead is hoisted by ropes, the ropes are adjusted to ensure that the attack angle of the warhead is within the range, and at the same time, the axis of the warhead is coincided with the center line of the target.

[0056] Step 6: Arrange the ground test equipment before the test, including the rocket sled space-time position test equipment, speed test equipment and high-speed video test equipment. Specifically, it is required that:

[0057] a) Rocket sled space-time position testing equipment, speed testing equipment and high-speed video testing equipment are tested outside the slide rail, and the testing equipment is arranged in a safety shelter;

[0058] b) The speed testing equipment is generally selected in the form of a broken target testing equipment;

[0059] c) All testing equipment has a unified time zero point;

[0060] Step 7: After the test conditions are met, the rocket engine is ignited, the rocket sled is ignited and launched, and after the engine is burned out, the target hits the warhead;

[0061] Step 8: Read the data of the rocket sled space-time position testing equipment, speed testing equipment, high-speed video testing equipment and vibration testing equipment;

[0062] The present application uses a rocket sled as a 30-ton super-large concrete load inverse carrying platform, hits the warhead at a certain speed, and obtains the penetration process overload, deformation, stress, rocket sled space-time position and speed testing data through the projectile sensor, space-time position testing equipment, speed testing equipment and high-speed video testing equipment. The test method realizes the 30-ton super-large concrete load inverse trajectory rocket sled test for the first time, simulates the warhead penetration target process, obtains a large amount of high-resolution data, and provides data support for simulation evaluation and actual combat.

Claims

1. A method for testing a 30-ton-class ultra-large concrete load using a reverse ballistic rocket sled, wherein a 30-ton-class ultra-large concrete load is loaded at the front end of the rocket sled, and under the thrust of the rocket engine, it is accelerated to a predetermined speed range and impacts the stationary warhead at the end of the trajectory. The reverse ballistic method is used to simulate the process of the warhead penetrating a hard target. Its characteristics are: Includes the following steps: (1) Based on the dimensions and angle requirements of the concrete target, design the shape of the embedded, long-span pressure-dividing rocket sled structure suitable for 30-ton concrete load. (2) Design the cladding plate and arrange the embedded screws in an array on the cladding plate to achieve the integrated design of concrete and cladding plate; (3) Calculate the rocket engine model and quantity according to the design of the installation platform quality and speed requirements, design and manufacture the rocket skid, which is divided into a second-stage target load skid and a first-stage engine thrust skid, and the two skids are connected by a thrust transmission device. (4) Pour a 30-ton concrete load and install it onto the skid; (5) Deploy the warhead at the end of the track; (6) Deploy ground testing equipment before the test, including rocket sled spatiotemporal position testing equipment, speed testing equipment and high-speed video recording testing equipment; (7) After the test conditions are met, the rocket engine is ignited, the rocket skid is launched, and the target hits the warhead after the engine burns out and reaches the predetermined speed. (8) Read the data from the rocket sled spatiotemporal position test equipment, speed test equipment, high-speed video recording test equipment and vibration test equipment.

2. The method for testing a 30-ton-class ultra-large concrete load reverse ballistic rocket sled according to claim 1, characterized in that: In step (1), in order to ensure the safety of the large mass test object and the sled body on the track during the operation of the rocket sled, the distribution of the sliding shoes is optimized during the structural design, and a pressure-sharing support structure is designed to make the force on a single fastening point of the track reasonable, ensure that the reaction force of the sliding shoe support does not exceed the bearing capacity of the slide rail, and meet the key index requirements of the track's ability to withstand downward pressure, upward pulling force, and allowable stress range of materials.

3. The method for testing a 30-ton-class ultra-large concrete load reverse ballistic rocket sled according to claim 1, characterized in that: In step (1), the specific steps for designing the shape of the embedded, long-span pressure-distributing rocket sled structure suitable for a 30-ton concrete load are as follows: a) Based on the ballistic design and aerodynamic estimation, obtain the preliminary shape of the test platform, select suitable materials, and design the structure and connection interface of the large-load target installation platform. b) Through quasi-static stiffness analysis, the rationality of the installation platform structure and connection interface design was initially determined. Based on the analysis results, the design was optimized until the stiffness analysis results met the design requirements. c) Conduct aerodynamic layout analysis, design an embedded, long-span pressure-sharing structure suitable for ultra-large tonnage concrete loads, perform dynamic calculations on the entire system, analyze the matching between the large load target and the pressure-sharing structure, control the stress on the rocket sled structure within the allowable stress range of the material, optimize the slide shoe layout, and make the reaction force of the rocket sled shoe rail support less than the bearing capacity of the slide rail. Through cross-iterative analysis of aerodynamics, dynamics and statics, the vibration dynamic environment of the rocket sled system is finally reduced.

4. The method for testing a 30-ton-class ultra-large concrete load reverse ballistic rocket sled according to claim 1, characterized in that: In step (2), a screw is pre-embedded inside the target, and an arc plate of equal diameter is wrapped around the outside. The screw is then connected to the arc plate and connected to the support structure on both sides to achieve an integrated design of the target and the skid.

5. The method for testing a 30-ton-class ultra-large concrete load reverse ballistic rocket sled according to claim 1, characterized in that: In step (3), a thrust rod is used to transmit force between the second-stage skid and the first-stage skid. The thrust rod is divided into two parts: the front force transmission cylinder is located at the rear end of the second-stage skid engine and is connected to the rear thread of the engine; the rear force transmission cylinder is located at the front end of the first-stage skid engine and is connected to the engine head.

6. The method for testing a 30-ton-class ultra-large concrete load reverse ballistic rocket sled according to claim 5, characterized in that: The specific requirements for step (3) are as follows: a) The secondary skid is connected and fixed to the skid by pre-embedded screws; b) The target is threaded to the lower steel plate by pre-embedded screws, connecting the semi-circular steel plate and the target into an integral target. High-strength integral beam structures are designed on both sides to cooperate with the target. c) The main load-bearing structures on both sides of the target adopt a high-strength integral beam in the shape of a groove. The target is embedded in the groove and raised at both ends to ensure the front and rear limit of the target and increase the overall rigidity. Long holes are opened at the contact position between the beam and the target to increase the welding area between the beam and the target and ensure the welding strength. d) The first-stage skid is made of a thrust device, a beam-shoe assembly, a seven-ring joint, and a rectangular tube welded together, and is fixed to the first-stage skid by four retaining rings.

7. The method for testing a 30-ton-class ultra-large concrete load reverse ballistic rocket sled according to claim 1, characterized in that: In step (5), the warhead is hoisted onto the sling using ropes. When installing the sling, ensure that the axis of the test projectile coincides with the center line of the skid target, and that the skid target surface collides with the test projectile when the first three skids slide off the track.

8. The test method for a 30-ton-class ultra-large concrete load reverse ballistic rocket sled according to claim 1, characterized in that: In step (6), a spacetime position testing device is set up on the slide rail to test the spacetime position of the rocket sled during the test process; a target speed testing device is used to test the speed at the end of the track; an optoelectronic theodolite testing device is used to test the entire process of the rocket sled's operation; and a ground high-speed video recording of the penetration of the target is used to test the process.

9. The method for testing a 30-ton-class ultra-large concrete load reverse ballistic rocket sled according to claim 1, characterized in that: In step (6), the rocket sled spatiotemporal position test equipment, speed test equipment and high-speed video recording test equipment are tested outside the slide rail, and safety shelters are set up for the test equipment.

10. The test method for a 30-ton-class ultra-large concrete load reverse ballistic rocket sled according to claim 1, characterized in that: In step (6), all test devices have a unified time zero point.

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