A manufacturing method for equal initiation pitch of an air-dropped linear warhead

Abstract

The present invention provides a method for making an air-dropped linear warhead with equal detonation pitch, and the method mainly includes the following steps: the first step: determining combat indicators; the second step: determining the types of main charge and booster charge of the warhead; the third step: determining the detonation pitch length and charge amount of the warhead; the fourth step: deriving the linear warhead curve equation under the dual-aircraft carrying state; the fifth step: completing the production of the detonation pitch warhead for actual variable pitch combat. The method provided by the present invention uses an unmanned aerial vehicle to carry a linear warhead to clear mines and obstacles, and the linear warhead can ensure equal detonation pitch after being dropped from the air and landing, so as to maximize the utilization rate of the explosion energy.

Description

Technical Field

[0001] The invention belongs to the field of national defense and military affairs, and in particular is a method for manufacturing detonation pitches of air-delivered linear warheads. Background Art

[0002] Urban street fighting or combat minefields cause partial division of the battlefield due to a large number of physical obstacles, which creates great difficulties for the attacking side. In order to respond to urban road obstacles, minefields, block barrier walls, small bunkers, tunnels, and the outer surfaces of buildings, rapid and precise targeted directional blasting can provide strong support for coordinated infantry advancement. UAV platforms can be used to carry out long-distance and precise delivery of linear warheads to clear obstacles.

[0003] Compared with single-point obstacle removal equipment of drones, linear charge obstacle removal blasting equipment has the advantages of wide obstacle removal range and high efficiency. When the linear warhead is carried by two aircraft, the warhead is in a catenary state after being deployed in the air (such as Figure 1 As shown in the figure, the pitch of the warhead main charge during production is different from the detonation pitch after air delivery. The detonation pitch between the main charges after the warhead lands is related to the minesweeping and obstacle removal capability. The equal detonation pitch can maximize the energy utilization of the warhead. Therefore, establishing a reasonable method for making equal detonation pitches for air-delivered linear warheads is a key issue that needs to be solved urgently. Summary of the invention

[0004] In view of the above defects or improvement needs of the prior art, the present invention provides a method for manufacturing an equal detonation pitch of an air-delivered linear warhead, so as to solve the equal pitch detonation of the main charge of the linear warhead after the air-delivered linear warhead lands, so that the explosion energy can be fully utilized.

[0005] The technical solution of the present invention to solve the above technical problems is as follows: A method for making an air-delivered linear warhead with equal detonation pitch comprises the following steps:

[0006] Step 1: Determine the operational indicators, specifically the obstacle failure pressure ΔP and the width L of the opening path.

[0007] Step 2: Determine the types of the main charge and booster charge of the warhead, specifically the type of the main charge of the warhead, the TNT equivalent conversion coefficient i of the main charge, and the detonation speed v between the main charges.

[0008] The third step: determine the warhead detonation pitch length and charge quantity, specifically: determine the warhead detonation pitch length D and charge quantity Q based on the obstacle failure pressure ΔP, the opening passage width L, and the main charge TNT equivalent conversion coefficient a in the first two steps.

[0009] Step 4: Derive the shape function of the linear warhead in the two-aircraft carrying state, specifically: Determine the length S of the warhead according to the combat requirements, and ensure that the linear density ρ of the ground projection after the warhead unfolds in the air is uniform, that is, ensure that the initiation pitch is the same.

[0010] Step 5: Complete the production of the actual variable pitch combat equal initiation pitch warhead, specifically: Manufacture the main charge module, webbing, male connector, female connector, and detonating cord.

[0011] The beneficial effect of the present invention is that this method uses an unmanned aircraft to carry a linear warhead for mine sweeping and obstacle breaking. After the linear warhead is dropped in the air and lands, it can ensure an equal initiation pitch, which can maximize the utilization rate of the explosion energy. Brief Description of the Drawings

[0012] Figure 1 It is a schematic diagram of the in-air deployment of the linear warhead carried by two aircraft;

[0013] Figure 2 It is a schematic diagram of the initiation action range of adjacent medicine balls;

[0014] Figure 3 It is a schematic diagram of the projection of the linear warhead in the coordinate system;

[0015] Figure 4 It is a structural composition diagram of the linear warhead.

[0016] In the drawings, the list of components represented by each label is as follows:

[0017] 1 - Unmanned aircraft, 2 - Linear warhead, 21 - Male connector, 22 - Webbing, 23 - Main charge module, 24 - Detonating cord, 25 - Female connector, L represents the depth of the cleared passage, R1 represents the explosion action radius of the i1th, R2 represents the explosion action radius of the i2th, and D represents the initiation pitch. Specific Embodiments

[0018] In order to make the purpose, technical solutions and advantages of the present invention clearer, the following further elaborates on the present invention in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0019] Embodiment 1

[0020] The present invention provides a method for manufacturing an equal initiation pitch of an air-dropped linear warhead, and the method mainly includes the following steps:

[0021] Step 1: Determine the combat indicators;

[0022] Step 2: Determine the main charge and booster charge types of the warhead;

[0023] Step 3: Determine the initiation pitch length and charge amount of the warhead;

[0024] Step 4: Deduce the curve equation of the linear warhead under the condition of being carried by two aircraft;

[0025] Step 5: Complete the production of the warhead with equal initiation pitch for actual variable pitch operation, etc.

[0026] Specifically, in the first step, the combat indicators are specifically to determine the obstacle failure pressure ΔP and the width L of the cleared path. As Figure 2 shown, the distance between adjacent main charges is D, which is the initiation pitch, and the width L of the cleared path is the maximum distance where the shock wave pressure P is greater than the obstacle failure pressure ΔP after the main charge detonates.

[0027] Specifically, the second step is specifically as follows: Select the main charge type of the warhead and the conversion coefficient a of the corresponding TNT equivalent of the main charge.

[0028] Specifically, the third step is specifically as follows: Determine the initiation pitch D and the charge amount Q of the warhead according to the obstacle failure pressure ΔP, the width L of the cleared path, and the conversion coefficient a of the TNT equivalent of the main charge in the previous two steps.

[0029] Specifically, the fourth step is specifically as follows: Determine the length S of the warhead according to the combat requirements, ensure that the linear density ρ of the ground projection after the warhead unfolds in the air is uniform, that is, ensure that the initiation pitch is the same, and finally determine the main charge pitch during production.

[0030] Example 2

[0031] Furthermore, the determination process and theory of the initiation pitch D and the charge amount Q are as follows:

[0032] 1) Calculate the shock wave overpressure P1 at the action radius R1 after the detonation of the main charge i1. Taking the ordinary ground as an example, the shock wave overpressure can be determined by the Sadovskii formula:

[0033]

[0034] In the formula: W = aQ, where w is the charge amount after converting to the TNT equivalent;

[0035] 2) Calculate the shock wave overpressure P2 at the action radius R2 after the detonation of the main charge i2. Taking the ordinary ground as an example, the shock wave overpressure can be determined by the Sadovskii formula:

[0036]

[0037] 3) Ensure that P1 and P2 are greater than ΔP within the range of the width L of the opened passage. Adjust the main charge amount Q to obtain the minimum values of R1 and R2, and then obtain the main charge amount Q. Next, determine the initiation spacing D between the main charges of the warhead according to the relationship between the three sides of a right triangle.

[0038] Furthermore, the curve equation of the warhead is the linear curve equation of the warhead under its own weight. The process and theory of this curve equation and the pitch of the main charge during production are as follows:

[0039] 1) Assume that both ends of the linear warhead are completely at the same height in the air, and the warhead end is subjected to a resultant force F. Decompose the force F along the xy-axis. Assume that the y-direction coincides with the direction of gravity, then Fx is the horizontal tension and Fy is the vertical gravity. The force decomposition schematic diagram is shown in Figure 3 . According to the force decomposition, the following relationship exists between Fx and Fy:

[0040]

[0041] y is the curve slope at the force application point, that is, the derivative at this point.

[0042] 2) As shown in Figure 3 , take a length microelement dl on the linear warhead as the research object. The projection of dl on the x-axis is dx. To ensure an equal initiation pitch for the linear warhead, it is necessary to ensure that the density of the warhead on the ground is uniform, that is, the density within the projection dx of dl on the x-axis is uniform. Therefore, there is:

[0043] mg = ρgdx Equation (4)

[0044] Where: m is the mass of the microelement dl, ρ is the average linear density of the warhead on the ground, and g is the acceleration due to gravity.

[0045] 3) Derive the curve equation of the linear warhead when it unfolds in the air. As shown in Figure 3 , when the curve of the linear warhead is differentiated in the coordinate system, there is:

[0046]

[0047] From Equation (5), it can be obtained that Fx = C, where C is a constant;

[0048]

[0049] Combining Equation (3) and Equation (6), it can be obtained that:

[0050]

[0051] Integrating Equation (7) gives:

[0052]

[0053] where: k = ρg / Fx. Taking the lowest point of the curve at the origin of coordinates, we have C2 = 0. Also, at the origin position y(0) = 0, then C1 = 0. Therefore, Equation (8) can be simplified to:

[0054]

[0055] Equation (9) is the equation of the linear warhead's air-deployment curve.

[0056] 4) Calculate the actual pitch of the main charge of the warhead according to the equation of the linear warhead's air-deployment curve. The equation of the linear warhead's air-deployment curve is a quadratic equation about x, and the different pitch lengths di can be obtained by the following formula:

[0057]

[0058] where: d i is the length of the i-th pitch, x i+1 is the horizontal coordinate of the front end of the i-th pitch, x i is the horizontal coordinate of the rear end of the i-th pitch.

[0059] Example 3

[0060] Furthermore, in the fifth step, a warhead with an actual variable pitch for combat and equal detonation pitch is fabricated. The structure of the fabricated linear warhead is as Figure 4 shown, specifically: it is fabricated using a male connector 21, a webbing 22, a main charge module 23, a detonating cord 24, and a female connector 25. When fabricating, the pitch of the main charge is determined according to Equation (10).

[0061] Those skilled in the art can easily understand that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A manufacturing method for equal initiation pitch of an air-dropped linear warhead, characterized in that, It includes the following steps: The first step: Determine the combat indicators; The second step: Determine the types of main charge and booster charge of the warhead; The third step: Determine the initiation pitch length and charge amount of the warhead; The fourth step: Deduce the curve equation of the linear warhead under the condition of double-aircraft carrying; The fifth step: Complete the production of the actual variable pitch combat equal-initiation pitch warhead; The determination of the types of main charge and booster charge of the warhead specifically means selecting the type of main charge of the warhead and the conversion coefficient a of the main charge corresponding to the TNT equivalent; The fourth step specifically is: Determine the length S of the warhead according to the combat requirements, ensure that the linear density ρ of the projection on the ground after the warhead unfolds in the air is uniform, that is, ensure that the initiation pitch is the same, and finally determine the pitch of the main charge during production; The process of the curve equation and the pitch of the main charge during production is as follows: 1) Assume that both ends of the linear warhead are completely at the same height in the air, and the warhead end is affected by the resultant force F. Decompose the force F along the xy axes. Assume that the y direction coincides with the direction of the gravity action, then Fx is the horizontal tension and Fy is the vertical gravity. According to the force decomposition, Fx and Fy have the following relationship: y is the slope of the curve at the force application point, that is, the derivative at this point; 2) Take a length microelement dl on the linear warhead as the research object. The projection of dl on the x-axis is dx. To ensure an equal initiation pitch for the linear warhead, it is necessary to ensure that the density on the ground of the warhead is uniform, that is, the density within the projection dx of dl on the x-axis is uniform. Therefore, there is: mg = ρgdx Equation (4) In the formula: m is the mass of the microelement dl, ρ is the average linear density of the warhead on the ground, and g is the acceleration due to gravity; 3) Deduce the curve equation of the linear warhead when it unfolds in the air. The derivative of the curve of the linear warhead in the coordinate system is: From Equation (5), it can be obtained that Fx = C, where C is a constant; Combining Equation (3) and Equation (6) gives: Integrating Equation (7) gives: In the formula: k = ρg / Fx. Taking the lowest point of the curve at the origin of the coordinates, then C2 = 0. Also, at the origin position y(0) = 0, then C1 = 0. Therefore, Equation (8) can be simplified to: Equation (9) is the curve equation of the linear warhead when it unfolds in the air; 4) Calculate the pitch of the main charge during the production of the warhead according to the curve equation of the linear warhead when it unfolds in the air. The curve equation of the linear warhead when it unfolds in the air is a quadratic equation about x, and its different pitch lengths di can be obtained by the following formula: where: d i is the i-th pitch length, x i+1 is the horizontal coordinate of the front end of the i-th pitch, x i is the horizontal coordinate of the rear end of the i-th pitch.

2. The manufacturing method for equal initiation pitch of an air-dropped linear warhead according to claim 1, characterized in that: The combat indicators specifically mean determining the obstacle failure pressure ΔP and the width L of the cleared path.

3. The manufacturing method for equal initiation pitch of an air-dropped linear warhead according to claim 2, characterized in that: Determine the initiation pitch length D and the charge amount Q of the warhead according to the determined obstacle failure pressure ΔP, the width L of the cleared path, and the conversion coefficient a of the main charge TNT equivalent.

4. The manufacturing method for equal initiation pitch of an air-dropped linear warhead according to claim 3, characterized in that: The determination process of the initiation pitch length D and the charge amount Q is as follows: 1) Calculate the shock wave overpressure P1 at the action radius R1 after the detonation of the main charge i1. Taking the ordinary ground as an example, the shock wave overpressure can be determined by the Sadovskii formula: In the formula: W = aQ, where w is the charge amount after converting to the TNT equivalent; 2) Calculate the shock wave overpressure P2 at the action radius R2 after the detonation of the main charge i2. Taking the ordinary ground as an example, the shock wave overpressure can be determined by the Sadovskii formula: 3) Ensure that P1 and P2 are greater than ΔP within the range of the opening passage width L, adjust the main charge charge Q, obtain the minimum values ​​of R1 and R2, obtain the main charge charge Q, and then determine the detonation pitch length D between the main charges of the warhead based on the relationship between the three sides of the right triangle.

5. The manufacturing method of equal initiation pitch of an air-dropped linear warhead as described in claim 1, wherein: The linear warhead structure is specifically made of a male connector (21), a webbing (22), a main charge module (23), a detonating cord (24), and a female connector (25).

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