CN111998739A - Rocket projectile dynamic power fragment field testing method and device - Google Patents
Rocket projectile dynamic power fragment field testing method and device Download PDFInfo
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B35/00—Testing or checking of ammunition
- F42B35/02—Gauging, sorting, trimming or shortening cartridges or missiles
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Abstract
The embodiment of the invention provides a method and a device for testing a dynamic power fragment field of a rocket projectile, and relates to the technical field of ammunition power tests. The method comprises the following steps: laying by adopting a galvanized iron wire mesh to form a grid target, wherein the grid target comprises a plurality of fragment positions A (x) for marking the rocket projectile0，y00) of the ground coordinate system OXYZ and the projectile coordinate system OdXdYdZdAnd determining a ground coordinate system OXYZ direction projectile coordinate system OdXdYdZdThe coordinate conversion relational expression of (1); according to the fragment position A (x) of rocket projectile0，y00) and a coordinate transformation relation, and determining the dynamic dispersion angle phi of the fragment and the central angle eta of the fragment ray. The method and the device can calculate and evaluate the dynamic dispersion angle phi and the fragment ray central angle eta of the fragments under the dynamic condition, wherein the fragment ground killing area of the rocket projectile can be intuitively determined according to the fragment ray central angle eta.
Description
Technical Field
The invention relates to the technical field of ammunition power tests, in particular to a method and a device for testing a dynamic power fragment field of a rocket projectile.
Background
In actual combat, the ground kills the grenade and the rocket projectile warhead mainly kill the target by fragments generated after explosion. The purpose and significance of the power test are that various parameter values related to the power of the tested ammunition are obtained through the test, so that the power of the ammunition on acting on a target can be evaluated comparatively. According to the power of a certain ammunition, whether the power of the ammunition meets tactical technical indexes or not can be determined, and whether the power of the ammunition meets design requirements or not can be determined; the power of two different ammunitions can also be compared through the power result, so as to determine which design is more reasonable and determine the optimal scheme.
The power test is generally divided into two types of dynamic power test and static explosion power test according to the test mode. At present, the static explosion power test testing method is relatively mature. For the calculation of the dynamic force test result, a simulation method is generally adopted, and the test of the dynamic force chip field is blank.
Therefore, the method for testing the dynamic power fragment field of the rocket projectile is designed, the dynamic power fragment field can be tested, the fragment scattering characteristic under dynamic power can be evaluated and calculated, and the dynamic scattering angle and the killing area under dynamic conditions can be calculated and evaluated, which is a technical problem which needs to be solved urgently at present.
Disclosure of Invention
The invention aims to provide a method and a device for testing a dynamic power fragment field of a rocket projectile, which can test the dynamic power fragment field and evaluate and calculate fragment flying characteristics under dynamic power, so that a dynamic flying angle and a killing area under dynamic conditions can be calculated and evaluated.
Embodiments of the invention may be implemented as follows:
in a first aspect, an embodiment of the present invention provides a method for testing a dynamic force fragment field of a rocket projectile, where the method for testing a dynamic force fragment field of a rocket projectile includes:
the method comprises the steps of adopting a galvanized iron wire mesh to lay to form a grid target, wherein the grid target comprises a plurality of grids which are uniformly distributed, and the grids are used for marking fragment positions A (x) of rocket projectiles0，y0，0)；
Establishing a ground coordinate system OXYZ according to the explosion point of the rocket projectile;
establishing a projectile body coordinate system O according to the center of the warhead of the rocket projectiledXdYdZd；
According to the ground coordinate system OXYZ and the projectile coordinate system OdXdYdZdDetermining the ground coordinate system OXYZ to the projectile coordinate system OdXdYdZdThe coordinate conversion relational expression of (1);
according to the fragment position A (x) of the rocket projectile0，y00) and the coordinate conversion relation, determining the dynamic dispersion angle phi of the fragment and the fragment ray central angle eta.
In an alternative embodiment, the step of establishing a ground coordinate system xyz based on the detonation point of the rocket projectile comprises:
and establishing the ground coordinate system OXYZ by taking the projection O of the explosion point on the ground as an origin, taking the horizontal direction of the projectile as an X axis, taking the direction perpendicular to the ballistic plane and inwards as a Y axis, and taking the direction perpendicular to the ground and upwards as a Z axis.
In an alternative embodiment, the projectile coordinate system O is established according to the center of the warhead of the rocket projectiledXdYdZdComprises the following steps:
the battle with the rocket projectileThe center of the part is the origin OdBallistic direction XdAxis, perpendicular to trajectory plane, inwardly YdAn axis establishing the projectile coordinate system OdXdYdZd。
In an alternative embodiment, the coordinate transformation relation is:
in the formula, thetacIs YdAngle formed between axis and Y-axis, HcIs ZdDistance between the axis and the Z axis.
In an alternative embodiment, the position of the fragment a (x) according to the rocket projectile is determined by the position of the fragment0，y00) and the coordinate transformation relation, and the step of determining the dynamic dispersion angle phi of the fragment and the fragment ray central angle eta comprises the following steps:
according to the fragment position A (x) of the rocket projectile0，y00) and the coordinate transformation relation, determining the fragment position A (x)0，y00) in the projectile coordinate system OdXdYdZdCorresponding coordinate B (x) in0d，y0d，z0d)；
According to the coordinates B (x)0d，y0d，z0d) And determining the dynamic dispersion angle phi of the fragment and the fragment ray central angle eta.
In an alternative embodiment, the calculation formula of the dynamic dispersion angle Φ is:
in an alternative embodiment, the calculation formula of the fragment ray central angle η is as follows:
in an alternative embodiment, the position of the fragment a (x) according to the rocket projectile is determined by the position of the fragment0，y00) and the coordinate transformation relation, determining the fragment position A (x)0，y00) in the projectile coordinate system OdXdYdZdCorresponding coordinate B (x) in0d，y0d，z0d) Comprises the following steps:
the fragment position A (x)0，y00) substituting the coordinate conversion relation to determine the coordinate B (x)0d，y0d，z0d)。
Among the parameters of fragment scattering, the dynamic scattering angle phi and the fragment ray central angle eta of fragments are two important parameters of the warhead for dealing with the aerial target. The dynamic dispersion angle phi refers to a cone angle which is made by taking the mass center as the vertex and contains 90% of effective fragments in the axis plane of the warhead after the warhead explodes, namely an included angle between two warps which contains 90% of the effective fragments on the fragment scattering distribution diagram. The fragment ray center angle η is an angle between a fragment distribution center line in the dispersion angle and an equatorial plane passing through the center of mass of the warhead, wherein the fragment distribution center line is a boundary line containing 45% fragments on both sides.
In the embodiment of the invention, according to the fragment position A (x0, y0, 0) of the rocket projectile and the coordinate conversion relational expression, a dynamic power fragment field can be tested, and fragment scattering characteristics under dynamic power can be evaluated and calculated, so that the dynamic scattering angle phi and the fragment ray central angle eta of the fragment under the dynamic condition can be calculated and evaluated, wherein the fragment ray central angle eta can also visually determine the fragment ground killing area of the rocket projectile.
In a second aspect, an embodiment of the present invention provides a rocket projectile dynamic force fragment field testing apparatus, where the apparatus includes:
a memory for storing a ground coordinate system OXYZ established according to the explosion point of the rocket projectile and a projectile coordinate system O established according to the center of the warhead of the rocket projectiledXdYdZdAnd the ground coordinate system OXXYZ is directed to the projectile coordinate system OdXdYdZdThe coordinate conversion relational expression of (1);
the grid target comprises a plurality of grids which are uniformly distributed and are used for marking fragment positions A (x) of the rocket projectile0，y00), the grid target is paved by a galvanized iron wire mesh;
a processor for determining the fragment position A (x) of the rocket projectile0，y00) and the coordinate conversion relation, determining the dynamic dispersion angle phi of the fragment and the fragment ray central angle eta.
The rocket projectile dynamic power fragment field testing device provided by the embodiment of the invention can conveniently test and evaluate the dynamic fragment field of the guided rocket projectile, so that the dynamic scattering angle and the killing area under the dynamic condition can be calculated and evaluated.
In an alternative embodiment, the apparatus further comprises:
the grid target comprises a plurality of grids which are uniformly distributed and are used for marking fragment positions A (x) of the rocket projectile0，y0，0)。
In an alternative embodiment, the mesh target is laid by using a galvanized iron wire mesh.
The rocket projectile dynamic power fragmentation field testing device provided by the embodiment of the invention adopts a galvanized iron wire mesh to lay and form the grid target, and a plurality of grids which are uniformly distributed are formed on the grid target, so that the rocket projectile dynamic power fragmentation field testing device at least has the following beneficial effects:
1. the laying is relatively convenient;
2. the price is cheaper;
3. the grid can effectively relieve pressure, so that the damage of shock waves to the target surface is prevented;
4. because the grid is small, the line drawing and the partition on the target surface are convenient, and the prefabricated fragments with the diameter of more than 4mm can be effectively recorded;
5. because the strength of the target surface is lower, the target surface cannot be broken after the broken piece hits the target surface.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a block diagram of a rocket projectile dynamic force fragmentation field testing device according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a mesh target structure;
FIG. 3 is a flowchart of a method for testing a dynamic force fragmentation field of a rocket projectile according to an embodiment of the present invention;
FIG. 4 is a graph showing the results of testing a mesh target;
FIG. 5 shows a ground coordinate system OXYZ and a projectile coordinate system OdXdYdZdA schematic diagram of (a);
FIG. 6 is a labeled schematic diagram of a dynamic divergence angle φ;
FIG. 7 is a labeled schematic of the fragment ray center angle η.
Icon: 100-rocket projectile dynamic power fragmentation field testing device; 110-a memory; 120-a processor; 130-mesh target.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. indicate an orientation or a positional relationship based on that shown in the drawings or that the product of the present invention is used as it is, this is only for convenience of description and simplification of the description, and it does not indicate or imply that the device or the element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
At present, a simulation method is generally adopted for calculating a dynamic force test result, and a test for a dynamic force chip field is blank. In view of the above, embodiments of the present invention provide a method and an apparatus for testing a dynamic force fragmentation field of a rocket projectile, which can test the dynamic force fragmentation field and evaluate and calculate fragment scattering characteristics under dynamic force, so as to calculate and evaluate a dynamic scattering angle and a killing area under dynamic conditions.
Referring to fig. 1, the present embodiment provides a rocket projectile dynamic force fragment field testing apparatus 100, which includes a memory 110, a processor 120 and a grid target 130.
The memory 110 stores a ground coordinate system OXYZ established based on the explosion point of the rocket projectile and a projectile coordinate system O established based on the center of the warhead of the rocket projectiledXdYdZdAnd a ground coordinate system OXYZ-direction projectile coordinate system OdXdYdZdThe coordinate transformation relation of (1). The processor 120 is configured to determine a fragmentation position A (x) of the rocket projectile0，y00) and a coordinate conversion relation, determining a dynamic dispersion angle phi of the fragments and a fragment ray central angle eta, wherein the fragment ray central angle eta can also visually determine the fragment ground killing area of the rocket projectile.
Tests show that after the static explosion of the arc-shaped, conical and parabolic warhead, the fragments are distributed as follows: the circumference side direction is a segment of a sphere, and the front top and the rear bottom are two frustum platforms. Wherein 80-90% of the fragments are in the lateral spherical segment, and 10-20% of the fragments are in the front and rear frustum.
Among the parameters of fragment scattering, the dynamic scattering angle phi and the fragment ray central angle eta of fragments are two important parameters of the warhead for dealing with the aerial target. The dynamic dispersion angle phi refers to a cone angle which is made by taking the mass center as the vertex and contains 90% of effective fragments in the axis plane of the warhead after the warhead explodes, namely an included angle between two warps which contains 90% of the effective fragments on the fragment scattering distribution diagram. The fragment ray center angle η is an angle between a fragment distribution center line in the dispersion angle and an equatorial plane passing through the center of mass of the warhead, wherein the fragment distribution center line is a boundary line containing 45% fragments on both sides.
In this embodiment, according to the fragment position a (x0, y0, 0) of the rocket projectile and the coordinate transformation relational expression, the dynamic power fragment field can be tested, and the fragment scattering characteristics under dynamic power can be evaluated and calculated, so that the dynamic scattering angle Φ and the fragment ray central angle η of the fragment under the dynamic condition can be calculated and evaluated, wherein the fragment ray central angle η can also visually determine the fragment ground killing area of the rocket projectile.
Referring to fig. 2, the mesh target 130 is formed by laying a 10-mesh galvanized wire mesh with 2.8mm holes and 0.5mm thick. The grid target 130 comprises a plurality of grids uniformly arranged, and the grids are used for marking the fragment position A (x) of the rocket projectile0，y0,0). Therefore, the grid target 130 is convenient to lay and low in price, the grid can be effectively decompressed, the damage of shock waves to the target surface is prevented, and the target surface cannot be broken after the target surface is hit by fragments due to low strength of the target surface. Because the grid is smaller, the line drawing and the partition on the target surface are more convenient, and the prefabricated fragments with the diameter of more than 4mm can be effectively recorded,the grid target 130 may be divided into four quadrants, which are distributed in quadrants of a coordinate system.
The results of the rocket projectile dynamic force fragmentation field test using the mesh target 130 provided in this embodiment are shown in fig. 4.
Based on the apparatus 100 for testing a dynamic force fragmentation field of a rocket projectile provided in this embodiment, the present embodiment further provides a method for testing a dynamic force fragmentation field of a rocket projectile, which is implemented by the processor 120, please refer to fig. 3, and the method specifically includes the following steps:
s1: referring to fig. 2, a mesh target is formed by laying a galvanized wire mesh. Wherein, the grid target 130 comprises a plurality of grids which are uniformly arranged, and the grids are used for marking the fragment position A (x) of the rocket projectile0，y0，0)。
S2: referring to fig. 5, a ground coordinate system xyz is established according to the explosion point of the rocket projectile.
A ground coordinate system OXYZ is established by taking a projection O of an explosion point on the ground as an origin, taking the horizontal direction of a projectile as an X axis, taking the inward direction perpendicular to a ballistic plane as a Y axis and taking the upward direction perpendicular to the ground as a Z axis.
S3: referring to fig. 5, a projectile coordinate system O is established according to the center of the warhead of the rocket projectiledXdYdZd。
Wherein, the center of the warhead of the rocket projectile is taken as the origin OdBallistic direction XdAxis, perpendicular to trajectory plane, inwardly YdAxis, establishing a projectile coordinate system OdXdYdZd。
S4: according to the ground coordinate system OXYZ and the projectile coordinate system OdXdYdZdDetermining a ground coordinate system OXYZ direction projectile coordinate system OdXdYdZdThe coordinate transformation relation of (1).
Referring to fig. 5, the bomb coordinate system OdXdYdZdY of (A) isdShaft clockwise rotation thetacElastic body coordinate system OdXdYdZdZ of (A)dAxial downward translation HcI.e. the elastic body coordinate system O can be madedXdYdZdTo be in accordance with the ground coordinate system xyz.
Can obtain the earth coordinate system OXYZ direction projectile coordinate system OdXdYdZdThe coordinate transformation relation of (1):
in the formula, thetacIs YdAngle formed between axis and Y-axis, HcIs ZdDistance between the axis and the Z axis.
S5: according to the fragment position A (x) of rocket projectile0，y00) and a coordinate transformation relation, and determining the dynamic dispersion angle phi of the fragment and the central angle eta of the fragment ray.
Firstly, according to the fragment position A (x) of rocket projectile0，y00) and coordinate transformation relation to determine the fragment position A (x)0，y00) in the missile coordinate system OdXdYdZdCorresponding coordinate B (x) in0d，y0d，z0d). According to the grid positions, the positions of fragment falling points in any grid in a ground coordinate system OXYZ can be obtained theoretically, due to the fact that the workload is large during testing, the coordinates of all fragments are not recorded, and the number of fragments in each cell is only counted.
Specifically, the grid position of the fragment on the grid target 130 is determined; according to the grid position, the fragment position A (x) of the fragment in the ground coordinate system OXYZ is obtained through a random function0，y00); will fragment position A (x)0，y00) substituting into the coordinate conversion relation to determine the coordinate B (x)0d，y0d，z0d)。
Then, according to the coordinate B (x)0d，y0d，z0d) And determining the dynamic dispersion angle phi of the fragment and the central angle eta of the fragment ray.
Wherein, referring to FIG. 6, the vectors
The included angle between the missile axis and the missile axis is the dynamic dispersion angle phi, and the calculation formula of the dynamic dispersion angle phi is as follows:
referring to FIG. 7, the fragment scatter rays at OdYdZdProjection on plane and OdYdThe included angle between the axes is the fragment ray in the projectile coordinate system OdXdYdZdThe value of the lower central angle eta, eta ranges from-180 degrees to 180 degrees, and the counter-clockwise direction is defined as positive and the clockwise direction is defined as negative. The calculation formula of the fragment ray central angle eta is as follows:
the rocket projectile dynamic power fragment field testing method and device provided by the embodiment have the beneficial effects that:
1. according to the fragment position A (x0, y0, 0) and the coordinate conversion relational expression of the rocket projectile, a dynamic power fragment field can be tested, and fragment scattering characteristics under dynamic power can be evaluated and calculated, so that a dynamic scattering angle phi and a fragment ray central angle eta of the fragments under the dynamic condition can be calculated and evaluated, wherein the fragment ray central angle eta can also visually determine the fragment ground killing area of the rocket projectile;
2. the grid target 130 is convenient to lay and low in price, the grid can be effectively decompressed, damage to the target surface caused by shock waves is prevented, and the target surface cannot be broken after fragments hit the target surface due to the fact that the strength of the target surface is low. Because the grid is smaller, the line drawing and the partition on the target surface are more convenient, and the prefabricated fragments with the diameter of more than 4mm can be effectively recorded.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (9)
1. A test method for a dynamic power fragment field of a rocket projectile is characterized by comprising the following steps:
the method comprises the following steps of adopting a galvanized iron wire mesh to lay to form a grid target (130), wherein the grid target (130) comprises a plurality of grids which are uniformly distributed, and the grids are used for marking fragment positions A (x) of rocket projectiles0，y0，0)；
Establishing a ground coordinate system OXYZ according to the explosion point of the rocket projectile;
establishing a projectile body coordinate system O according to the center of the warhead of the rocket projectiledXdYdZd；
According to the ground coordinate system OXYZ and the projectile coordinate system OdXdYdZdDetermining the ground coordinate system OXYZ to the projectile coordinate system OdXdYdZdThe coordinate conversion relational expression of (1);
according to the fragment position A (x) of the rocket projectile0，y00) and the coordinate conversion relation, determining the dynamic dispersion angle phi of the fragment and the fragment ray central angle eta.
2. The method of claim 1, wherein the step of establishing a ground coordinate system, oexyz, based on the detonation point of the projectile comprises:
and establishing the ground coordinate system OXYZ by taking the projection O of the explosion point on the ground as an origin, taking the horizontal direction of the projectile as an X axis, taking the direction perpendicular to the ballistic plane and inwards as a Y axis, and taking the direction perpendicular to the ground and upwards as a Z axis.
3. The method of claim 2, wherein a projectile seat is established based on the center of the warhead of the projectileSystem of symbols OdXdYdZdComprises the following steps:
using the center of the warhead of the rocket projectile as an origin OdBallistic direction XdAxis, perpendicular to trajectory plane, inwardly YdAn axis establishing the projectile coordinate system OdXdYdZd。
4. The method of claim 3, wherein the coordinate transformation relationship is:
in the formula, thetacIs YdAngle formed between axis and Y-axis, HcIs ZdDistance between the axis and the Z axis.
5. The method for testing the dynamic force fragment field of rocket projectile according to claim 4, wherein said fragment position A (x) is determined according to said rocket projectile0，y00) and the coordinate transformation relation, and the step of determining the dynamic dispersion angle phi of the fragment and the fragment ray central angle eta comprises the following steps:
according to the fragment position A (x) of the rocket projectile0，y00) and the coordinate transformation relation, determining the fragment position A (x)0，y00) in the projectile coordinate system OdXdYdZdCorresponding coordinate B (x) in0d，y0d，z0d)；
According to the coordinates B (x)0d，y0d，z0d) And determining the dynamic dispersion angle phi of the fragment and the fragment ray central angle eta.
6. The method for testing the dynamic force fragment field of the rocket projectile according to claim 5, wherein the formula for calculating the dynamic dispersion angle is as follows:
7. the method for testing the dynamic force fragment field of the rocket projectile according to claim 5, wherein the formula for calculating the central angle η of the fragment ray is as follows:
8. the method for testing the dynamic force fragment field of rocket projectile according to claim 5, wherein said fragment position is A (x) according to said rocket projectile0，y00) and the coordinate transformation relation, determining the fragment position A (x)0，y00) in the projectile coordinate system OdXdYdZdCorresponding coordinate B (x) in0d，y0d，z0d) Comprises the following steps:
the fragment position A (x)0，y00) substituting the coordinate conversion relation to determine the coordinate B (x)0d，y0d，z0d)。
9. A rocket projectile dynamic force fragment site testing device, the device comprising:
a memory (110) storing a ground coordinate system OXYZ established according to the explosion point of the rocket projectile and a projectile coordinate system O established according to the center of the warhead of the rocket projectiledXdYdZdAnd the ground coordinate system OXXYZ is directed to the projectile coordinate system OdXdYdZdThe coordinate conversion relational expression of (1);
a grid target (130) comprising a plurality of grids uniformly arranged, wherein the grids are used for marking the fragment position A (x) of the rocket projectile0，y00), the grid target (130) is paved by a galvanized iron wire mesh;
a processor (120) for determining a fragmentation position A (x) of the projectile0，y00) and the coordinate conversion relation, determining the dynamic dispersion angle phi of the fragment and the fragment ray central angle eta.
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