A synchronous impact loading method for large-area complex curved surfaces

Abstract

The invention relates to a method for synchronous impact loading of a large-area complex curved surface, comprising the following steps: uniformly mixing photosensitive explosive powder in a liquid dispersant; converting the load to be loaded on a target object into a photosensitive explosive charge thickness; planning the running track of a spray gun in a spraying operation according to the converted charge thickness; using the spray gun to spray the photosensitive explosive coating on the surface of the target object according to the planned running track to form an explosive coating; drying the explosive coating on the surface of the target object; arranging a strong flash light source, the strong light generated by the light source irradiates all the explosive coatings, and realizing synchronous detonation impact loading on the large-area complex curved surface; the method can synchronously perform synchronous detonation loading on the large-area complex curved surface.

Description

Technical Field

[0001] The invention relates to a synchronous impact loading method for a large-area complex curved surface, belonging to the technical field of synchronous detonation. Background Art

[0002] In some mechanical research, it is often necessary to apply an impact load to the surface of an object at the same time. The commonly used technical means is to arrange some explosives on the surface of the object to form an array as required, and to achieve the effect of synchronized detonation as much as possible by strictly controlling the detonation time of these explosive arrays.

[0003] The disadvantage of this method is that if the area of ​​a single charge in the array is small, it is difficult to effectively simulate the entire surface being subjected to synchronous impact loads, which is equivalent to turning a plane into densely distributed points on the plane. At the same time, the synchronization requirements of the detonation system are extremely high, making it difficult to accurately synchronize detonation.

[0004] If the area of ​​a single charge in the array is enlarged, replacing the entire plane with many densely distributed circles or other shapes, it is difficult to ignore the explosive transmission process within a single charge, and synchronous detonation cannot be achieved within a single charge. Summary of the invention

[0005] In order to solve the problems existing in the prior art, the present invention provides a method for synchronously detonating and loading a large-area complex curved surface.

[0006] In order to achieve the above object, the technical solution proposed by the present invention is: a method for synchronous impact loading of a large-area complex curved surface, characterized in that it includes the following steps:

[0007] uniformly mixing the photosensitive explosive powder in the liquid dispersant;

[0008] Convert the load required to be applied to the target object into the thickness of the photosensitive explosive charge;

[0009] Plan the trajectory of the spray gun during the spraying operation according to the converted charge thickness;

[0010] Using a spray gun, the photosensitive explosive coating is sprayed on the surface of the target object according to the planned running trajectory to form an explosive coating;

[0011] Drying the explosive coating on the surface of the target object;

[0012] A strong flash light source is provided, and the strong light generated by the light source illuminates the entire explosive coating, thereby realizing synchronous detonation impact loading on a large area of ​​complex curved surface.

[0013] A further design of the above technical solution is: the load that the target object needs to be loaded with is converted into the thickness of the photosensitive explosive charge according to the properties of the photosensitive explosive and the concentration of the photosensitive explosive in the liquid dispersant.

[0014] The strong flash light source is realized by passing strong electricity through the metal wire.

[0015] The metal wires are provided in plurality, and the plurality of metal wires are arranged in an array matching the surface of the target object.

[0016] The beneficial effects of the present invention are:

[0017] In the present invention, the explosive coating is completely adhered and covered on the surface of the object, and any point on the surface will be directly loaded by the explosion shock wave, rather than the loading of the entire surface simulated by the explosive array; the photosensitive explosive will detonate under the action of strong light, and the speed of light is extremely fast. The time error from the strong light source to any point on the surface of the object can be completely ignored, thereby ensuring the time synchronization of the detonation on the entire surface.

[0018] The explosive coating is sprayed on the surface of any complex geometric shape, and the thickness of the explosive coating formed by a single spraying is very small. Repeated stacking can achieve continuous adjustment and gradient change of the charge amount. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the structure of a detonation platform according to an embodiment of the present invention;

[0020] Figure 2 for Figure 1 Schematic diagram of the connection between the middle bracket and the upper and lower platforms;

[0021] Figure 3 It is a schematic diagram of L-shaped steel;

[0022] Figure 4 It is a cross-sectional view of the connection block;

[0023] Figure 5 Schematic diagram of the wire holder structure.

[0024] In the figure: 1-upper platform, 11-notch, 2-lower platform, 3-bracket, 31-second strip hole, 4-L-shaped steel, 41-first strip hole, 5-optical axis guide rail, 51-fixed seat, 6-radial slide rail, 61-connecting block, 611-through hole, 612-threaded hole, 7-metal wire, 71-wire seat, 711-through hole, 712-locking screw, 713-binding post, 714-locking nut, 8-base, 81-pad, 9-target object. DETAILED DESCRIPTION

[0025] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments. Example

[0026] The synchronous impact loading method for large-area complex curved surfaces of this embodiment includes the following steps:

[0027] After the mixed liquid is statically deposited, the photosensitive explosive powder is uniformly mixed in the liquid dispersant at a mixing ratio of 1:10 by volume. In this embodiment, acetone is used as the liquid dispersant.

[0028] The load planned to be loaded on the surface of the target object is converted into the photosensitive explosive charge thickness according to the properties of the photosensitive explosive and the concentration of the photosensitive explosive powder in the liquid dispersant; in this embodiment, the photosensitive explosive powder with a surface density of 10 mg / cm^2 corresponds to a specific impulse of 4.73 Pa•s, and the corresponding spraying thickness is 0.44 mm. If a specific impulse of 14.19 is required, the corresponding spraying thickness should be 0.88 mm.

[0029] Plan the trajectory of the spray gun during the spraying operation according to the designed charge thickness;

[0030] Using high-precision automated spraying equipment, the photosensitive explosive coating is sprayed on the surface of the object according to the set trajectory to form an explosive coating; the photosensitive explosive coating on the surface of the target object is dried at low temperature;

[0031] A strong flash light source is set up to ensure that the strong light generated instantly can fully illuminate the entire explosive coating, realizing synchronous impact loading on a large area of ​​complex curved surface.

[0032] When the surface of the target object is a complex curved surface, a single point light source may not be able to fully illuminate the entire curved surface. In this embodiment, a strong flash light source is set as a plurality of metal wires, and flash is achieved by passing strong electricity through the metal wires. The plurality of metal wires are arranged in an array matching the surface of the target object, and then the plurality of metal wires are simultaneously energized to achieve strong flash, ensuring that the strong light can fully illuminate the entire explosive coating, thereby achieving synchronous detonation loading.

[0033] The device for realizing synchronous detonation and loading in this embodiment is as follows: Figure 1 As shown, it includes an upper platform 1 and a lower platform 3 both in a "U" shape, the openings of the upper and lower platforms of the "U" shape face the same direction, and the upper and lower platforms are connected by a bracket 3, combined with Figure 2 As shown, the bracket 3 is made of square cold-bent hollow steel, and notches 11 are provided on both sides of the upper and lower platforms for the bracket 3 to be embedded. In this embodiment, a total of four brackets 3 are provided, and the upper and lower platforms are fixedly connected to the bracket 3 through L-shaped steel 4. One side of the L-shaped steel 4 is connected to the upper or lower platform, and the two ends of the other side are connected to the two brackets on both sides of the upper or lower platform. Figure 3 As shown, Figure 3The left picture in the middle is the main view of L-shaped steel 4. Figure 3 The middle right side is a left view of the L-shaped steel 4, both sides of the L-shaped steel 4 are provided with a first strip hole 41, the upper and lower platforms are provided with through holes at corresponding positions, and the bracket 3 is provided with a second strip hole 31 at the corresponding position. The L-shaped steel 4 is fixedly connected to the upper or lower platform by bolts passing through the first strip holes 41 and the through holes on the upper or lower platform and then screwing nuts; similarly, the L-shaped steel 4 is fixedly connected to the bracket 3 by bolts passing through the first strip holes 41 and the second strip holes 31 of the bracket 3 and then screwing nuts; the two sides of the L-shaped steel 4 are respectively connected to the upper and lower platforms and the bracket 3, so that the bracket 3 is fixedly connected to the upper and lower platforms.

[0034] The upper and lower platforms are provided with optical axis guide rails 5 on opposite sides. Two optical axis guide rails 5 arranged parallel to each other are respectively provided on the upper and lower platforms. Fixed seats 51 are fixed at both ends of the optical axis guide rails 5. The fixed seats 51 are provided with through holes. The optical axis guide rails 5 are inserted into the through holes and fixedly connected to the fixed seats 51. The fixed seats 51 are fixed on the upper or lower platform.

[0035] A plurality of radial slide rails 6 are slidably connected to the two optical axis guide rails 5 located on the upper or lower platform, and each radial slide rail 6 is slidably connected to the two optical axis guide rails 5 and is arranged perpendicular to the two optical axis guide rails 5. Two connecting blocks 61 are slidably connected to the radial slide rails, such as Figure 4 As shown, the connection block 61 is provided with two through holes 611 arranged perpendicular to each other, and one side of the two through holes 611 is provided with a threaded hole 612 connected to the corresponding through hole, and the threaded hole 612 is used to screw the locking bolt; the radial slide rail 6 and the optical axis guide rail 5 are respectively slidably connected in the two through holes 611, and are fixed by the locking bolts in the corresponding threaded holes 612; loosening the locking bolt, the connection block 61 can slide along the radial slide rail 6 or the optical axis guide rail 5, tightening the locking bolt, one end of the locking bolt can be tightly against the radial slide rail 6 or the optical axis guide rail 5, and the connection block 61 is fixed to the radial slide rail 6 or the optical axis guide rail 5. The radial slide rail 6 can slide on the optical axis guide rail 5 in a direction parallel to or perpendicular to the optical axis guide rail 5 through the connection block 61.

[0036] The radial slide rail 6 is provided with a thread seat 71, which is combined with Figure 5As shown, the wire seat 71 is connected to the metal wire 7, and the two ends of each metal wire 7 are respectively connected to the radial slide rails 6 located on the upper and lower platforms; the wire seat 71 is provided with a through hole 711, and a threaded hole connected to the through hole 711 is provided on one side of the through hole 711, and a locking screw 712 is screwed in the threaded hole, and the wire seat 71 is provided with a terminal 713, and the metal wire 7 is connected to the terminal 713, and the terminal 713 is provided with an external thread, and a locking nut 714 is screwed through the external thread, and the locking nut 714 is provided with a through hole, and the metal wire 7 passes through the through hole to be connected to the terminal 713 and is fixed by the locking nut 714, and the metal wire 7 is fixed to the terminal 713 by tightening the locking nut 714, and the metal wire 7 is loosened from the terminal 713 by loosening the locking nut 714, and the length of the metal wire 7 can be adjusted.

[0037] A cushion block 81 is provided at the bottom of the lower platform 2 and is fixed to the base 8 through the cushion block 81. The base 8 is used to support the entire array-type detonation platform.

[0038] The device can place the target object 9 at the opening of the "U"-shaped platform, spray the photosensitive explosive on the target object 9 using the method of this embodiment, and then adjust the position and length of the metal wire 7 through the radial guide rail 6 and the wire seat 71, so that the multiple metal wires 7 form an array shape that matches the surface of the target object 9, and by passing high-voltage current through the metal wire 7, the metal wire 7 emits extremely strong light, and the photosensitive explosive on the surface of the target object 9 is synchronously detonated. When the surface of the target object 9 is irregular, the metal wire 7 array can also be adjusted to ensure that the surface of the target object 9 is simultaneously irradiated with strong light, so as to achieve the purpose of synchronous detonation.

[0039] The technical solutions of the present invention are not limited to the above-mentioned embodiments, and any technical solutions obtained by equivalent replacement methods fall within the scope of protection required by the present invention.

Claims

1. A method for synchronous impact loading of large-area complex curved surfaces, characterized in that: The device for realizing synchronous detonation loading comprises an upper platform, a lower platform, a bracket connecting the upper and lower platforms, a plurality of radial slide rails slidably connected to the upper and lower platforms, and a plurality of metal wires connected to the radial slide rails, wherein both ends of each metal wire are respectively connected to the radial slide rails located on the upper and lower platforms; the upper and lower platforms have the same opening direction; A plurality of metal wires are arranged in an array that matches the surface of the target object; The impact loading method comprises: Place the target object in the platform opening; uniformly mixing the photosensitive explosive powder in the liquid dispersant; Convert the load required to be applied to the target object into the thickness of the photosensitive explosive charge; Plan the trajectory of the spray gun during the spraying operation according to the converted charge thickness; Using a spray gun, the photosensitive explosive coating is sprayed on the surface of the target object according to the planned running trajectory to form an explosive coating; Drying the explosive coating on the surface of the target object; Strong electricity is passed through the metal wire to form a strong flash light source. The strong light generated by the light source irradiates the entire explosive coating, realizing synchronous detonation impact loading on a large area of ​​complex curved surface.

2. The method for synchronous impact loading of large-area complex curved surfaces according to claim 1, characterized in that: The load required to be loaded on the target object is converted into the charge thickness of the photosensitive explosive according to the properties of the photosensitive explosive and the concentration of the photosensitive explosive in the liquid dispersant.

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