CN112557589B - Method and system for evaluating release characteristics of active fragment coupling energy time-space domain - Google Patents
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Abstract
The invention relates to a method and a system for evaluating the coupled energy time-space domain release characteristics of active fragments, wherein the method comprises the steps of S1, obtaining the active fragments; s2, placing the active fragments into a launching device, and endowing the active fragments with initial kinetic energy; s3, generating fragment cloud with kinetic energy and chemical energy after the active fragments act on an activation device; s4, synchronous triggering: the system comprises a pulse X-ray photographic device, a high-speed photographic device and an infrared thermometer, wherein the pulse X-ray photographic device, the high-speed photographic device and the infrared thermometer respectively acquire three-dimensional fragment cloud kinetic energy information, flare area profile information and fragment cloud combustion temperature information on a plurality of time-space domains in the real-time movement process of the fragment cloud; and S5, performing active fragment coupling energy time-space domain output characteristic evaluation according to the three-dimensional fragment cloud kinetic energy information, the contour information of the flare area and the fragment cloud combustion temperature information on different time-space domains which are measured synchronously.
Description
Technical Field
The invention relates to the technical field of novel material performance testing, in particular to a method and a system for evaluating release characteristics of an active fragment coupling energy time-space domain.
Background
The active fragments are damage elements prepared from novel super-insensitive energetic materials (called as active materials) with certain structural strength. The structure is kept intact and the performance is stable under the conventional storage state and the weak stimulation of falling, needling and the like; when the target is impacted at high speed, a large amount of chemical energy stored in the target is quickly released in a short time, and the effect of enhancing kinetic energy damage is achieved. Compared with traditional energetic materials such as gunpowder, explosive, pyrotechnic agent and the like, the active material has higher strength, density and chemical energy carrying capacity by improving the formula and the process. Since the chemical energy release behavior and mechanism of active materials are quite different from those of traditional energetic materials, the evaluation means suitable for the energy release behavior of the energetic materials are not suitable for the active materials at present.
The impact energy release behavior of the active material is essentially a continuous and rapid chemical energy release process which is started after the material reaches a chemical reaction critical threshold under the strong external stimulation. The typical characteristics of the energy release behavior of the active fragment damage element are as follows: sustainability is achieved, and the time required for complete release of energy is in the order of microseconds and milliseconds; has the characteristics of kinetic energy and chemical energy coupling release; the coupled energy is released at different time-free locations as the active fragment moves.
At the present stage, the evaluation method for the active fragment impact energy release behavior is single, the observation of fragment cloud combustion profile and temperature field information under specific dimensionality is mostly carried out, and only the incomplete quantitative observation can be carried out on the chemical energy release behavior under a specific state. The observation of the kinetic energy of the active fragments and the multi-dimensional chemical energy release behavior is neglected. With the continuous development of active fragment development technology, the single-dimensional evaluation method cannot meet the research requirement of active fragment energy release behavior. It is desirable to provide a method for evaluating the release characteristics of active fragment coupled energy time-space domain.
Disclosure of Invention
Technical problem to be solved
In view of the above-mentioned shortcomings and drawbacks of the prior art, the present invention provides a method and system for evaluating the release characteristics of an active fragment coupled energy space-time domain.
(II) technical scheme
In order to achieve the purpose, the invention adopts the main technical scheme that:
in a first aspect, an embodiment of the present invention provides a method for evaluating a release characteristic of an active fragment coupled energy time-space domain, including:
s1, obtaining active fragments;
s2, placing the active fragments into a launching device, and endowing the active fragments with initial kinetic energy;
s3, generating fragment cloud with kinetic energy and chemical energy after the active fragments act on an activation device;
s4, synchronous triggering: the system comprises a pulse X-ray photographic device, a high-speed photographic device and an infrared thermometer, wherein the pulse X-ray photographic device, the high-speed photographic device and the infrared thermometer respectively acquire three-dimensional fragment cloud kinetic energy information, flare area profile information and fragment cloud combustion temperature information on a plurality of time-space domains in the real-time movement process of the fragment cloud;
and S5, performing active fragment coupling energy time-space domain output characteristic evaluation according to the three-dimensional fragment cloud kinetic energy information, the contour information of the flare area and the fragment cloud combustion temperature information on different time-space domains which are measured synchronously.
Preferably, the material of the active fragments comprises an active alloy material, an active amorphous material, an active fluoride material and an active high-entropy alloy material.
Preferably, the launching device and the activating device can be flexibly arranged according to experimental research requirements;
the launching device may include, but is not limited to, gunpowder, explosive, light gas gun drive modes;
the activation device may include, but is not limited to, a typical equivalent target plate.
Preferably, the step S5 specifically includes:
and performing weighted calculation according to the three-dimensional fragment cloud kinetic energy information, the contour information of the flare area and the fragment cloud combustion temperature information on the different time-space domains, which are measured synchronously, in a preset mode to obtain a calculation result.
In a second aspect, the present embodiment also provides a system for using any of the above methods for evaluating release characteristics of an active fragment coupled energy space-time domain, the system comprising:
the method comprises the following steps: the device comprises an emitting device, an activating device, a pulse X-ray photographic device, a high-speed photographic device and an infrared thermometer;
the pulse X-ray photographic device, the high-speed photographic device and the infrared thermometer are used for obtaining three-dimensional fragment cloud kinetic energy information on different airspaces at the moment when the active fragments are contacted with the activation device, the high-speed photographic device obtains contour information of a fire light area, and the infrared thermometer obtains combustion temperature information of the fragment cloud.
Preferably, the first and second liquid crystal materials are,
the test system comprises a plurality of pulse X-ray photographing devices and a control system, wherein the pulse X-ray photographing devices are used for obtaining fragment cloud pictures at preset moments under a plurality of visual angles in a cross view field mode;
the test system comprises a plurality of high-speed photographic devices, a light path refraction control module and a control module, wherein the high-speed photographic devices in the test system are used for obtaining multi-view profile photos of burning fragment clouds in continuous space-time domains in a controlled light path refraction mode;
the number of the infrared thermometers in the test system is 1 or more than 1, and the infrared thermometers are used for acquiring temperature field information at the section of the fragment cloud profile in the continuous time domain.
(III) advantageous effects
The invention has the beneficial effects that:
the method for evaluating the release characteristics of the active fragment coupled energy time-space domain can carry out real-time and three-dimensional observation on the kinetic energy and the chemical energy related to the impact energy release behavior of the active material and accurately evaluate the damage capability of the active material.
The method for evaluating the release characteristics of the active fragment coupling energy time-space domain is simple to operate, good in feasibility, capable of obtaining effective data to the maximum extent and low in experimental cost.
The invention relates to a system for evaluating the release characteristics of an active fragment coupling energy time-space domain, which comprises the following components: the pulse X-ray photographic device, the high-speed camera and the infrared thermometer can be flexibly combined according to test requirements to obtain an imaging film of a fragment cloud and/or obtain an image corresponding to the fire light area through the high-speed camera and/or obtain a temperature value of the fire light area through the infrared thermometer.
Drawings
FIG. 1 is a schematic structural diagram of a system for evaluating release characteristics of active fragment coupled energy time-space domain according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the distribution of the kinetic energy field and the chemical energy field corresponding to the fragment cloud under the same spatio-temporal coordinate system in the embodiment of the present invention.
[ description of reference ]
1: a transmitting device;
2: an activation device;
3: a first pulse X-ray photographing device;
4: a second pulse X-ray photographing device;
5: a first pulsed X-ray imaging negative;
6: a second pulsed X-ray imaging negative;
7: an infrared thermometer;
8: a first high-speed camera;
9: a second high-speed camera;
10: an optical path controller;
Detailed Description
For the purpose of better explaining the present invention and to facilitate understanding, the present invention will be described in detail by way of specific embodiments with reference to the accompanying drawings.
In order to better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
The invention relates to the technical field of novel material performance testing, in particular to a coupling test evaluation method for various active fragment impact energy release behaviors, and a system for testing the release behaviors of kinetic energy and chemical energy at different empty positions in real time after the active fragments are activated is built on the basis of the method.
Example one
The embodiment of the invention provides a method for evaluating the release characteristics of an active fragment coupling energy time-space domain, which comprises the following steps:
and S1, obtaining the active fragments.
And S2, putting the active fragments into a launching device, and endowing the active fragments with initial kinetic energy.
And S3, generating fragment cloud with kinetic energy and chemical energy after the active fragments act with an activation device.
S4, synchronous triggering: the device comprises a pulse X-ray photographic device, a high-speed photographic device and an infrared thermometer, wherein the pulse X-ray photographic device, the high-speed photographic device and the infrared thermometer respectively acquire three-dimensional fragment cloud kinetic energy information, flare area profile information and fragment cloud combustion temperature information in a plurality of time-space domains in the real-time movement process of the fragment cloud.
In this embodiment, the time zero points of the pulsed X-ray photograph, the high-speed photograph and the infrared thermometry imaging photograph obtained in different time-space domains are processed synchronously so as to be in the same time-space coordinate system.
In this embodiment, for a high-speed photographic picture of the contour of the flare region generated by burning fragment clouds in a continuous time-space domain, position information of the contour of the flare region in different air is obtained by an image processing method, and the target rear movement speed and the expansion capacity of the flare region are obtained by processing.
For a specific T in this embodimentiAnd Ti+1The fragment cloud morphology picture in the pulse X-ray picture at the moment is randomly extracted, and the centroid is (X)i,yi,zi) Volume of DeltaViSmall infinitesimal of (1). Obtaining the mass m of fragments generated by active fragments in small infinitesimal by an image binarization processing methodi(ii) a Obtaining the speed v of the fragments in the infinitesimal by the motion trail of the fragments in the infinitesimal at two momentsi. The kinetic energy of the fragments in the infinitesimal region is calculated as
For selected TiSelecting the centroid of the same space position as (x) in the infrared temperature imaging photo at the momenti,yi,zi) Volume of DeltaViSmall infinitesimal of (1). Integrating the temperature field in the space range to obtain the chemical energy released by the combustion of the debris in the space range
And S5, performing active fragment coupling energy time-space domain output characteristic evaluation according to the three-dimensional fragment cloud kinetic energy information, the contour information of the flare area and the fragment cloud combustion temperature information on different time-space domains which are measured synchronously.
In the present embodiment, the infinitesimal Δ V is obtained according to the obtained specific time and positioniWeighting the kinetic energy and chemical energy data to obtain a coupling energy value E of the regioni＝Eki+Eci。
And traversing the steps for the fragment cloud area to obtain the time-space domain release characteristic of the active fragment coupling energy.
Preferably, in this embodiment, the launching device and the activation device may be flexibly set according to experimental research requirements; the active fragments comprise active alloy materials, active amorphous materials, active fluoride materials and active high-entropy alloy materials.
As is preferred in the present embodiment, the first,
the launching device may include, but is not limited to, gunpowder, explosive, light gas gun drive modes.
The activation device may include, but is not limited to, a typical equivalent target plate.
Preferably in this embodiment, the step S5 specifically includes:
and performing weighted calculation according to the measured three-dimensional fragment cloud kinetic energy information, the contour information of the flare area and the fragment cloud combustion temperature information in different time-space domains in a preset mode to obtain a calculation result.
In the embodiment, the method for evaluating the release characteristics of the active fragment coupled energy time-space domain can be used for carrying out real-time and three-dimensional observation on the kinetic energy and the chemical energy related to the impact energy release behavior of the active material, and accurately evaluating the damage capability of the active material.
The method for evaluating the release characteristics of the active fragment coupled energy time-space domain in the embodiment is simple to operate, good in feasibility, capable of obtaining effective data to the maximum extent and low in experimental cost.
In a second aspect, the present embodiment further provides a system for evaluating release characteristics of active fragment coupled energy space-time domain, the system comprising:
the method comprises the following steps: the device comprises an emitting device, an activating device, a pulse X-ray photographic device, a high-speed photographic device and an infrared thermometer.
The pulse X-ray photographic device, the high-speed photographic device and the infrared thermometer are used for obtaining three-dimensional fragment cloud kinetic energy information on different airspaces at the moment when the active fragments are contacted with the activation device, the high-speed photographic device obtains contour information of a fire light area, and the infrared thermometer obtains combustion temperature information of the fragment cloud.
Preferably, the first and second liquid crystal materials are,
the number of the pulse X-ray photographing devices in the test system is multiple, and the pulse X-ray photographing devices are used for obtaining fragment cloud pictures at preset moments under multiple visual angles in a cross view field mode.
The test system is characterized in that the number of the high-speed photographic devices in the test system is multiple, and the high-speed photographic devices are used for obtaining multi-view profile photos of burning fragment clouds in continuous space-time domains by controlling a light path refraction mode.
The number of the infrared thermometers in the test system is 1 or more than 1, and the infrared thermometers are used for acquiring temperature field information at the section of the fragment cloud profile in the continuous time domain.
In this embodiment, a system for evaluating release characteristics of active fragment coupled energy time-space domain includes: the pulse X-ray photographic device, the high-speed camera and the infrared thermometer can be flexibly combined according to test requirements to obtain an imaging film of a fragment cloud and/or obtain an image corresponding to the fire light area through the high-speed camera and/or obtain a temperature value of the fire light area through the infrared thermometer.
Example two
Referring to fig. 1, in a second aspect, in this embodiment, a system for evaluating release characteristics of an active fragment coupled energy space-time domain, the system comprises:
the launching device 1 is a ballistic gun with the caliber of 12.7 mm.
The activating device 2 is made of a Q235 steel plate with the thickness of 6 mm.
The pulsed X-ray photographing device (including the first pulsed X-ray photographing device 3 and the second pulsed X-ray photographing device 4) is 1200 kv pulsed X-ray photographing instrument manufactured by the company SCANFLASH sweden.
The pulse X-ray imaging negative films (comprising the first pulse X-ray imaging negative film 5 and the second pulse X-ray imaging negative film 6) are electronic silicon medium negative films which can be recycled and read on a special engineering computer.
And the infrared thermometer 7 is an SC7000 far infrared thermal imager produced by MeiFlir corporation.
The high-speed cameras (including the first high-speed camera 8 and the second high-speed camera 9) are selected from SA5 high-speed cameras from the company Phontron.
The optical path control system 10 selects a mirror with a smooth surface.
The deployment orientation of the instruments in the system is shown in FIG. 1. And (3) constructing a coordinate system x-y-z with the unit of m by taking the muzzle position of the launching device as the geometric origin (0,0,0) of a space coordinate system. The centroid coordinates of each device involved in this embodiment are respectively: the centroid coordinates of the activation device 2 are (1,0, 0); the centroid coordinate of the first pulse X-ray photographing device 3 is (2,1, 0); the centroid coordinate of the second pulse X-ray photographing device 4 is (2,0, 1); the centroid coordinate of the first pulse X-ray imaging negative film 5 is (2, -1, 0); the second pulse X-ray imaging negative film 6 has the mass center coordinates of (2,0, -1); the centroid coordinate of the infrared thermometer 7 is (2.5,1, 0); the centroid coordinate of the first high-speed camera 8 is (0,2, 0); the centroid coordinate of the second high-speed camera is (3,1, 0); the centroid coordinate of the optical path control system 10 is (3,0,0), and the angle between the normal direction of the optical path control system and the x-axis is 45 °.
FIG. 2 is a schematic distribution diagram of a kinetic energy field and a chemical energy field corresponding to a fragment cloud under the same spatio-temporal coordinate system in the embodiment of the invention.
In this embodiment, a system for evaluating release characteristics of active fragment coupled energy time-space domain includes: the pulse X-ray photographic device, the high-speed camera and the infrared thermometer can be flexibly combined according to test requirements to obtain an imaging film of a fragment cloud and/or obtain an image corresponding to the fire light area through the high-speed camera and/or obtain a temperature value of the fire light area through the infrared thermometer.
Since the system described in the above embodiment of the present invention is a system used for implementing the method of the above embodiment of the present invention, a person skilled in the art can understand the specific structure and the modification of the system based on the method described in the above embodiment of the present invention, and thus the detailed description is omitted here. All systems/devices adopted by the methods of the above embodiments of the present invention are within the intended scope of the present invention.
It should be noted that in the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The use of the terms first, second, third and the like are for convenience only and do not denote any order. These words are to be understood as part of the name of the component.
Furthermore, it should be noted that in the description of the present specification, the description of the term "one embodiment", "some embodiments", "examples", "specific examples" or "some examples", etc., means that a specific feature, structure, material or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, the claims should be construed to include preferred embodiments and all changes and modifications that fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention should also include such modifications and variations.
Claims (9)
1. A method for evaluating the release characteristics of an active fragment coupled energy time-space domain is characterized by comprising the following steps:
s1, obtaining active fragments;
s2, placing the active fragments into a launching device, and endowing the active fragments with initial kinetic energy;
s3, generating fragment cloud with kinetic energy and chemical energy after the active fragments act on an activation device;
s4, synchronous triggering: the system comprises a pulse X-ray photographic device, a high-speed photographic device and an infrared thermometer, wherein the pulse X-ray photographic device, the high-speed photographic device and the infrared thermometer respectively acquire three-dimensional fragment cloud kinetic energy information, flare area profile information and fragment cloud combustion temperature information on a plurality of time-space domains in the real-time movement process of the fragment cloud;
and S5, performing active fragment coupling energy time-space domain output characteristic evaluation according to the three-dimensional fragment cloud kinetic energy information, the contour information of the flare area and the fragment cloud combustion temperature information on different time-space domains which are measured synchronously.
2. The method of claim 1, wherein the active fragment material comprises: an active alloy material.
3. The method of claim 1, wherein the active fragment material comprises: an active amorphous material.
4. The method of claim 1, wherein the active fragment material comprises: an active fluoride material.
5. The method of claim 1, wherein the active fragment material comprises: an active high-entropy alloy material.
6. The method of claim 1,
the launching device can comprise gunpowder, explosive and light gas gun driving modes;
the activation means may comprise a typical equivalent target plate.
7. The method according to claim 1, wherein the step S5 specifically includes:
and performing weighted calculation according to the three-dimensional fragment cloud kinetic energy information, the contour information of the flare area and the fragment cloud combustion temperature information on the different time-space domains, which are measured synchronously, in a preset mode to obtain a calculation result.
8. A comprehensive experimental test system using the method of any one of claims 1 to 7, comprising: the device comprises an emitting device, an activating device, a pulse X-ray photographic device, a high-speed photographic device and an infrared thermometer;
the pulse X-ray photographic device, the high-speed photographic device and the infrared thermometer are used for obtaining three-dimensional fragment cloud kinetic energy information on different airspaces at the moment when the active fragments are contacted with the activation device, the high-speed photographic device obtains contour information of a fire light area, and the infrared thermometer obtains combustion temperature information of the fragment cloud.
9. The test system of claim 8,
the test system comprises a plurality of pulse X-ray photographing devices and a control system, wherein the pulse X-ray photographing devices are used for obtaining fragment cloud pictures at preset moments under a plurality of visual angles in a cross view field mode;
the test system comprises a plurality of high-speed photographic devices, a light path refraction control module and a control module, wherein the high-speed photographic devices in the test system are used for obtaining multi-view profile photos of burning fragment clouds in continuous space-time domains in a controlled light path refraction mode;
the number of the infrared thermometers in the test system is 1 or more than 1, and the infrared thermometers are used for acquiring temperature field information at the section of the fragment cloud profile in the continuous time domain.
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