Ammunition reaction intensity multi-parameter factor quantitative evaluation method

Abstract

The invention relates to an ammunition reaction intensity multi-parameter factor quantitative evaluation method, and belongs to the technical field of ammunition explosives. Comprising the following steps: acquiring response characterization parameters during ammunition detonation and IM accident response; obtaining a response characterization parameter factor corresponding to the IM accident based on the response characterization parameter; based on the response characterization parameter factors and the test data, establishing a comparison table of response intensity levels and key response characterization parameter factors corresponding to different types of ammunition warheads; based on the comparison table, the key response characterization parameter factor and the reaction intensity level, obtaining a degree factor and a reaction intensity number corresponding to the key response characterization parameter factor; and obtaining the reaction intensity grade and the reaction intensity degree of the IM accident based on the weight coefficient and the reaction intensity number. According to the method, by establishing a degree factor and a reaction intensity number corresponding to a key response characterization parameter factor, a reaction intensity multi-parameter factor quantitative evaluation method is established, and the problem that the typical ammunition reaction intensity cannot be continuously measured is solved.

Description

Technical Field

[0001] This invention relates to the field of projectile explosives technology, and in particular to a method for quantitative evaluation of the reaction intensity of munitions using multiple parameters. Background Technology

[0002] Throughout their lifespan, ammunition is frequently subjected to unexpected stimuli such as drops, impacts, friction, fragmentation, shock waves, heat, and static electricity. These stimuli trigger mechanical-chemical-thermal responses within the ammunition structure, leading to uncontrolled chemical reactions and energy releases. These reactions can cause typical accidental reactions, such as ignition, combustion, explosion, or even detonation of the propellant, resulting in severe environmental damage and potentially catastrophic consequences including numerous casualties. Therefore, it is crucial to assess the intensity of the reaction of loaded ammunition to unexpected stimuli, providing a basis for the selection, storage, protection, emergency response, and damage control measures for insensitive ammunition.

[0003] Currently, the assessment of the reaction intensity of ammunition under unexpected stimuli typically categorizes reaction intensity into several fixed levels. These levels are qualitatively determined based on expert experience, relying on characteristics such as the extent of casing fracture, verification plate marks, fragment size, and ground craters. However, existing reaction intensity assessments are largely subjective and qualitative descriptions, failing to provide continuous measurement of ammunition reaction intensity based on ammunition reaction intensity mechanism models. Consequently, they cannot quantitatively describe the reaction intensity level of ammunition in typical accidents or the severity of the reaction within that level. This severely restricts the development of non-sensitive ammunition.

[0004] It is evident that providing a quantitative assessment method for ammunition reaction intensity, and enabling continuous measurement of the reaction intensity of typical ammunition, is an urgent problem to be solved. Summary of the Invention

[0005] Based on the above analysis, the present invention aims to provide a multi-parameter factor quantitative evaluation method for ammunition reaction intensity, in order to solve the current problem that ammunition reaction intensity cannot be continuously measured.

[0006] This invention provides a method for quantitatively evaluating the intensity of ammunition reaction using multiple parameters, the method comprising the following steps:

[0007] Define the ammunition reaction intensity level, and obtain the response characterization parameters when the ammunition reaches the highest reaction intensity level and the response characterization parameters when responding to an IM accident;

[0008] Based on the response characterization parameters at the highest reaction intensity level of munitions and the response characterization parameters during IM accident response, the response characterization parameter factors corresponding to IM accidents are obtained through a comparative method.

[0009] A table comparing the reaction intensity levels and key response characterization parameters of different types of munition warheads was established based on the experimental data.

[0010] Based on the aforementioned comparison table and response characterization parameter factors, the degree factor corresponding to each key response characterization parameter factor is obtained. Based on the degree factor corresponding to each key response characterization parameter factor and the response intensity level, the corresponding response intensity number is obtained. Based on the type of munition warhead, the weight coefficient corresponding to each key response characterization parameter factor is obtained. Based on the response intensity number corresponding to each key response characterization parameter factor and the weight coefficient, the comprehensive response intensity number is obtained. Thus, the response intensity level of the IM accident and the severity of the response corresponding to the response intensity level are obtained.

[0011] Furthermore, the expression for the degree factor corresponding to each key response characterization parameter is as follows:

[0012]

[0013] Where, Φ N，j a represents the degree factor corresponding to the j-th key response characterization parameter factor. N，j a represents the lower limit value of the j-th key response characterization parameter factor corresponding to the reference table. N+1,j a represents the upper limit value of the j-th key response characterization parameter factor corresponding to the reference table. j This represents the value of the j-th key response characterization parameter factor.

[0014] Furthermore, the expression for the reaction intensity number is:

[0015] A j =N j -Φ N,j (15)

[0016] Among them, A j N represents the response intensity number corresponding to the j-th key response characterization parameter. j This represents the reaction intensity level corresponding to the j-th key response characterization parameter factor.

[0017] Furthermore, assuming that the number of key response characterization parameters corresponding to a certain munition warhead is n, of which n1 key response characterization parameters have values ​​falling within the value range corresponding to the Nth level of reaction intensity, and n-n1 key response characterization parameters have values ​​falling within the value range corresponding to the (N+1)th level of reaction intensity, then the expression for the comprehensive reaction intensity number is:

[0018]

[0019] Among them, A z The overall reaction intensity number, x j This represents the weight coefficient corresponding to the j-th key response characterization parameter factor. [Az represents the integer part of A z represents the integer part of A z represents the decimal part of A z represents the reaction intensity level of IM accident, Φ Nz represents the reaction intensity level of IM accident.

[0020] Further, the response characteristic parameter factor comprises: shock wave overpressure factor, impulse factor, charge reaction degree, shell expansion velocity factor, specific kinetic energy factor, specific kinetic energy rate factor, expansion acceleration factor, fragment velocity factor, fragment kinetic energy factor, natural fragment size factor.

[0021] Further, the shock wave overpressure factor and the impulse factor are obtained by the following expression:

[0022]

[0023] wherein ε p represents the shock wave overpressure factor, ΔP m represents the peak value of air shock wave overpressure in IM accident reaction, ΔP mdet represents the peak value of air shock wave overpressure in detonation, ε I represents the impulse factor, I represents air shock wave impulse in IM accident reaction, I det represents air shock wave impulse in detonation, t+ represents the action time of positive pressure in IM accident reaction, t det + represents the action time of positive pressure in detonation, ΔP(t) represents air shock wave overpressure at t moment in IM accident reaction, ΔP det (t) represents air shock wave overpressure at t moment in detonation.

[0024] Further, the shell expansion velocity factor is obtained by the following expression:

[0025]

[0026] wherein ε U represents the shell expansion velocity factor, U m represents the maximum value of shell expansion velocity in IM accident reaction, U mdet represents the maximum value of shell expansion velocity in detonation.

[0027] Further, the specific kinetic energy factor is obtained by the following expression:

[0028]

[0029] wherein ε ev represents the specific kinetic energy factor, E vIME represents the specific kinetic energy of the shell during the IM accident reaction vdet ρ represents the specific kinetic energy of the shell during the explosion m ρ represents the specific kinetic energy of the shell during the explosion

[0030] Further, the fragment velocity factor is obtained by the following expression:

[0031]

[0032] Wherein, ε v V0 represents the initial velocity of the fragment generated during the IM accident reaction, and V represents the initial velocity of the fragment generated during the explosion. 0det V0 represents the initial velocity of the fragment generated during the IM accident reaction, and V represents the initial velocity of the fragment generated during the explosion.

[0033] Further, the characteristic parameters include: air shock wave overpressure, air shock wave impulse, shell expansion speed, fragment velocity, fragment characteristic size, verification plate trace.

[0034] Compared with the prior art, the present application can at least realize one of the following beneficial effects:

[0035] 1. The present application obtains the corresponding response characteristic parameter factor based on the obtained response characteristic parameters during the explosion and the IM accident reaction through the comparison method, innovatively proposes the multi-response characteristic parameter factor system of reaction intensity, and provides a basis for subsequent continuous measurement of ammunition reaction intensity.

[0036] 2. The present application obtains the corresponding degree factor based on the reaction intensity grade and the key response characteristic parameter factor table and the response characteristic parameter factor, obtains the corresponding reaction intensity number based on the degree factor and the reaction intensity grade, obtains the comprehensive reaction intensity number based on the weight coefficient and the reaction intensity number, and further obtains the reaction intensity grade of the IM accident and the reaction intensity grade corresponding to the reaction intensity grade, realizes the quantitative description of the reaction intensity grade of the ammunition in the typical accident and the reaction intensity grade within the reaction intensity grade, solves the problem that the reaction intensity of the ammunition cannot be continuously measured, and provides a basis for promoting the development of insensitive ammunition.

[0037] In the present application, the above technical solutions can be combined with each other to realize more preferred combination solutions. Other features and advantages of the present application will be described in the subsequent specification, and some advantages will become apparent from the specification, or will be understood by implementing the present application. The purpose and other advantages of the present application can be realized and obtained from the contents specifically pointed out in the specification and the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0038] The accompanying drawings are included to provide a further understanding of the embodiments, and are incorporated herein and constitute a part of the detailed description. It should be noted that the accompanying drawings illustrate the embodiments, and therefore should not be considered limiting the scope of the application. In the drawings:

[0039] Figure 1 A flow chart of a multi-parameter factor quantitative evaluation method of ammunition reaction intensity according to an embodiment of the present application is shown in FIG. 1.

[0040] Figure 2 A schematic diagram of reaction intensity grade division according to an embodiment of the present application is shown in FIG. 2. DETAILED DESCRIPTION

[0041] The preferred embodiments of the present application will be described in detail below with reference to the drawings, in which the drawings constitute a part of this application, and are used to explain the principles of the embodiments of the present application, but are not used to limit the scope of the present application.

[0042] One specific embodiment of the present application discloses a multi-parameter factor quantitative evaluation method of ammunition reaction intensity. As shown in FIG. 1, the method comprises the following steps: Figure 1

[0043] Step S1, defining ammunition reaction intensity grade, obtaining response characteristic parameters at the highest ammunition reaction intensity grade and response characteristic parameters at the IM accident reaction time;

[0044] Step S2, obtaining response characteristic parameter factors corresponding to the IM accident by comparison method based on the response characteristic parameters at the highest ammunition reaction intensity grade and the response characteristic parameters at the IM accident reaction time;

[0045] Step S3, establishing a reaction intensity grade and key response characteristic parameter factor control table corresponding to different types of ammunition warheads based on the response characteristic parameter factors and test data;

[0046] Step S4, obtaining a degree factor corresponding to the key response characteristic parameter factor based on the control table and the response characteristic parameter factor, obtaining a corresponding reaction intensity number based on the degree factor corresponding to the key response characteristic parameter factor and the reaction intensity grade, obtaining a weight coefficient corresponding to the key response characteristic parameter factor based on the type of ammunition warhead, obtaining a comprehensive reaction intensity number based on the reaction intensity number corresponding to the key response characteristic parameter factor and the weight coefficient, and further obtaining the reaction intensity grade of the IM accident and the reaction intensity grade corresponding to the reaction intensity grade.

[0047] Specifically, in step S1, the ammunition reaction intensity grade refers to the grade divided according to the reaction severity of ammunition when subjected to various stimuli. The ammunition reaction intensity grade is divided into I to V grades from high to low according to the reaction intensity, including: I grade explosion, II grade explosion, III grade deflagration, IV grade combustion, and V grade no reaction.

[0048] ​Further, the response characteristic parameters include: air shock wave overpressure, air shock wave impulse, shell expansion velocity, fragment velocity, fragment characteristic size, verification plate trace. det , air shock wave impulse I det , shell expansion velocity U det , fragment velocity V det , fragment characteristic size det , verification plate trace det ; and the response characteristic parameters in the IM accident reaction are: air shock wave overpressure ΔP, air shock wave impulse I, shell expansion velocity U, fragment velocity V, fragment characteristic size, and verification plate trace.

[0049] It should be noted that the IM accident refers to a non-impact ignition accident other than impact initiation caused by accidental stimulation in the transportation, storage, use, etc. of ammunition, such as fragment impact, fast baking, slow baking, etc.

[0050] Specifically, the response characteristic parameters in the highest reaction intensity level explosion of ammunition and the response characteristic parameters in the IM accident reaction are obtained by test measurement or authoritative test data.

[0051] It should be noted that the response characteristic parameters in the highest reaction intensity level explosion of ammunition are obtained by static explosion test measurement or test data provided by ammunition research units. The response characteristic parameters in the IM accident reaction of ammunition are obtained by IM accident measurement.

[0052] In specific implementation, the curve of air shock wave overpressure changing with time is measured by a piezoelectric sensor, the curve of ammunition shell expansion velocity changing with time is measured by a PDV velocity test system, and the initial velocity of ammunition shell fragments is measured by a net target system. The peak value of air shock wave overpressure and the maximum value of shell expansion velocity can be obtained from the curve of air shock wave overpressure changing with time and the curve of ammunition shell expansion velocity changing with time.

[0053] It should be noted that the air shock wave overpressure and the ammunition shell expansion velocity can be measured when the reaction intensity level is deflagration, explosion and detonation.

[0054] Specifically, in step S2, the response characteristic parameter factors include: shock wave overpressure factor, impulse factor, charge reaction degree, shell expansion velocity factor, specific kinetic energy factor, specific kinetic energy rate factor, expansion acceleration factor, fragment velocity factor, fragment kinetic energy factor, and natural fragment size factor.

[0055] It should be noted that there are two causes for explosive charge reaction ignition: non-impact ignition (IM accident) and impact ignition (detonation); combustion, deflagration, and explosion all fall under non-impact ignition. Detonation has the highest reaction intensity, and the response characterization parameter value is the largest during detonation. Therefore, this invention uses the response characterization parameter during detonation as a benchmark. By comparing the obtained response characterization parameter during an IM accident reaction with the response characterization parameter during detonation at the corresponding highest reaction intensity level of the ammunition, the dimensionless response characterization parameter factor corresponding to the IM accident is obtained.

[0056] Furthermore, the shock wave overpressure factor and impulse factor are obtained through the following expressions:

[0057]

[0058] Where, ε p The overpressure factor of the shock wave, ΔP m ΔP represents the peak value of the air shock wave overpressure during the IM accident response. mdet ε represents the peak value of the air shock wave overpressure during detonation. I I represents the impulse factor, where I represents the impulse of the air shock wave during the IM accident response. det t represents the impulse of the air shock wave during detonation, and t+ represents the duration of the barometric pressure during the IM accident response. det + indicates the duration of the positive pressure during detonation, and ΔP(t) represents the air shock wave overpressure at time t during the IM accident response. det (t) represents the air shock wave overpressure at time t during detonation.

[0059] It should be noted that ΔP m ΔP mdet ΔP(t) and ΔP det (t) are all taken from the air shock wave overpressure data of the measurement point at the same distance from the detonation or IM accident center.

[0060] Furthermore, the charge reactivity is calculated based on the obtained shock wave overpressure.

[0061] Specifically, for explosions or more violent deflagrations, the peak value of the overpressure of the free-field air shock wave conforms to the following expression:

[0062]

[0063] Where r represents the distance from the blast center, ω be It indicates the equivalent weight of explosives left as reaction products after the charge explodes or deflagrates (unit: kg), and atm indicates the standard atmospheric pressure.

[0064] It should be noted that, using the above formula, ΔP measured at point r can be obtained. m To calculate ωbe .

[0065] Specifically, taking a cylindrical warhead charge as an example, ω be is related to the effective reaction equivalent explosive weight of the warhead ω as follows:

[0066]

[0067] wherein ω is the effective reaction equivalent explosive weight of the warhead (unit: kg), α is the warhead filling coefficient, γ is the multi-index of the charge, r0 is the radius of the warhead (unit: cm), r m is the break radius of the warhead (unit: cm).

[0068] It should be noted that the warhead refers to the part of the ammunition used for directly damaging the target, mainly including the shell, the charge and the detonation device; the shell is used to contain the charge and connect the fuse; the charge is usually composed of high-energy explosives, which is used to damage the target; the detonation device is used to control the detonation of the charge. The break radius of the warhead is the radius of the warhead when the fragments of the warhead reach the maximum speed. According to the above formula, ω be , α, γ, r0 and r m can be calculated.

[0069] Specifically, the reaction degree of the charge is obtained by the following expression:

[0070]

[0071] wherein λ represents the reaction degree of the charge, W R represents the effective charge mass of the warhead IM accident, and W represents the total mass of the warhead charge; wherein,

[0072]

[0073] wherein β represents the TNT shock wave equivalent coefficient of the charge formula.

[0074] It should be noted that the above method for calculating the reaction degree of the charge is only applicable to explosion or relatively intense deflagration. For relatively weak deflagration or combustion, since the kinetic energy of the shell accounts for a much smaller proportion relative to the detonation state, the above relationship between ω be and ω is not applicable, at this time, the total energy method can be used to determine the reaction degree of the charge according to the shell / fragment speed and the breakage degree data at the time of the IM accident reaction.

[0075] Further, the shell expansion speed factor is obtained by the following expression:

[0076]

[0077] wherein ε U represents the shell expansion speed factor, Um U represents the maximum rate of shell expansion during an IM accident response. mdet This represents the maximum rate of shell expansion during detonation.

[0078] Furthermore, the specific kinetic energy factor is obtained through the following expression:

[0079]

[0080] Where, ε ev E represents the specific kinetic energy factor. vIM E represents the specific kinetic energy of the shell during the IM accident response. vdet ρ represents the specific kinetic energy of the shell during detonation. m This indicates the density of the shell material.

[0081] Furthermore, the specific kinetic energy rate factor and the expansion acceleration factor are obtained through the following expressions:

[0082]

[0083] Where, ε evl E represents the specific kinetic energy factor. vIM This indicates the specific kinetic energy power of the casing during the IM accident response. The specific kinetic energy power of the casing during detonation, t det t represents the time taken for the shell expansion velocity to reach its maximum value during detonation. max ε represents the time taken for the shell expansion rate to reach its maximum value from 0 during an IM accident response. a This represents the expansion acceleration factor.

[0084] It should be noted that when detonation status data is missing, U mdet The following expression can be used to calculate:

[0085]

[0086] Where C is the total mass of the propellant charge, and M is the mass of the casing. This is Gurney's constant.

[0087] Specifically, the Gurney constants of commonly used high-energy explosives are shown in Table 1 below:

[0088] Table 1. Gurney constants for commonly used high-energy explosives.

[0089]

[0090] It should be noted that when t cannot be obtained det At that time, it becomes impossible to calculate the specific kinetic rate factor ε. evl At this point, only the specific kinetic energy factor ε is considered.ev .

[0091] Further, the fragment velocity factor is obtained by the following expression:

[0092]

[0093] wherein ε v represents the fragment velocity factor, V0 represents the initial velocity of the fragments produced in the IM accident reaction, and V 0det represents the initial velocity of the fragments produced in the explosion.

[0094] It should be noted that the velocity of the fragments after the shell is broken is a key response characterization parameter of the reaction intensity. The fragments produced by the ammunition include preformed fragments and semi-preformed fragments. The preformed fragments refer to fragments that are pre-processed and formed during the ammunition manufacturing process, and the preformed fragments have a specific shape, size and mass. The semi-preformed fragments refer to fragments whose shape, size and number are pre-determined by controlling the breaking form of the shell. The fragment velocity factor is applicable to both preformed fragments and semi-preformed fragments.

[0095] Further, the fragment kinetic energy factor is obtained by the following expression:

[0096]

[0097] wherein ε k represents the fragment kinetic energy factor, E kIM represents the kinetic energy of the fragments produced in the IM accident reaction, and E kdet represents the kinetic energy of the fragments produced in the explosion.

[0098] Further, the natural fragment size factor is obtained by the following expression:

[0099]

[0100] or,

[0101]

[0102] wherein ε L represents the natural fragment size factor, L represents the length of the shell, l represents the long side length of the fragments, R represents the radius of the shell, and d represents the diameter of the fragments.

[0103] It can be understood that the present application obtains the corresponding response characterization parameter factor based on the obtained response characterization parameters in the explosion and the IM accident reaction by the comparison method, innovatively proposes the multi-response characterization parameter factor system of the reaction intensity, and provides a basis for subsequent continuous measurement of the reaction intensity of the ammunition.

[0104] Specifically, in step S3, the ammunition warhead can be divided into blast-kill warhead, blast-destroy warhead, blast-penetrate warhead, shaped charge warhead and the like according to damage modes and warhead structures. Different types of warheads have different damage modes and warhead structures, resulting in differences in energy forms output by the IM accident reaction, and thus, the corresponding response characteristic parameter factors of the reaction intensity are also different. Even for the same response characteristic parameter factor, different ammunition warheads have different value intervals.

[0105] Specifically, Table 2, Table 3 and Table 4 respectively list the reaction intensity grade and key response characteristic parameter factor correspondence table of the blast-kill warhead, blast-destroy warhead and blast-penetrate warhead.

[0106] Table 2: Reaction intensity grade and key response characteristic parameter factor correspondence table of blast-kill warhead

[0107]

[0108] Table 3: Reaction intensity grade and key response characteristic parameter factor correspondence table of blast-destroy warhead

[0109]

[0110] Table 4: Reaction intensity grade and key response characteristic parameter factor correspondence table of blast-penetrate warhead

[0111]

[0112] It should be noted that the value interval (i.e. upper and lower limits) of each key response characteristic parameter factor in Table 2-Table 4 is obtained according to a large amount of existing test data, which can be adjusted according to a larger amount of test data. As can be seen from Table 2-Table 4, due to the different types of ammunition warheads, the key response characteristic parameters are also different. The selection of the key characteristic parameter factor is determined according to the work characteristics of the warhead. In Table 2-Table 4, only the typical key response characteristic parameter factor is listed, and other corresponding response characteristic parameter factors can be added as needed.

[0113] In specific implementation, first, the corresponding key response characteristic parameter factor is determined according to the type of ammunition warhead, and then the value of the key response characteristic parameter and the key response characteristic parameter factor of the IM accident are obtained through test measurement or authoritative test data, and finally the value interval of the key response characteristic parameter factor is obtained through the reaction intensity grade and key response characteristic parameter factor correspondence table of the corresponding type of ammunition warhead.

[0114] Specifically, in step S4, in order to better quantify the reaction severity corresponding to the reaction intensity grade of the IM accident through the key response characteristic parameter factor, a jLet represent the value of the j-th critical response characterization parameter factor, and let N represent the munition reaction intensity level, where N=1 represents a Level I detonation, and so on. Then the expression for the degree factor corresponding to the critical response characterization parameter factor is:

[0115]

[0116] Where, Φ N，j a represents the degree factor corresponding to the j-th key response characterization parameter factor. N,j a represents the upper limit value of the j-th key response characterization parameter factor corresponding to the reference table. N+1,j a represents the lower limit value of the j-th key response characterization parameter factor corresponding to the reference table. j This represents the value of the j-th key response characterization parameter factor.

[0117] It should be noted that equation (14) above indicates that the value of the j-th key response characterization parameter falls within the range of its corresponding N-th level of response intensity (i.e., [a N+1,j a N,j If a is inside )) N+1,j ≤a j N,j Therefore, 0 ≤ Φ N,j <1. Φ N,j The size of Φ reflects the intensity of the response corresponding to the IM accident response intensity level. N,j It can also be expressed as a percentage, Φ N,j The larger the value of Φ, the more intense the reaction corresponding to that intensity level. N,j =1 indicates that the current reaction intensity level N has reached its maximum, and a higher reaction intensity level (i.e., level N-1) is needed to represent the current reaction intensity level. Therefore, Φ N-1,j =0.

[0118] Furthermore, the expression for the reaction intensity number is:

[0119] A j =N j -Φ N,j (15)

[0120] Among them, A j N represents the response intensity number corresponding to the j-th key response characterization parameter. j This represents the reaction intensity level corresponding to the j-th key response characterization parameter factor.

[0121] ​It should be noted that the same type of ammunition warhead corresponds to multiple key response characteristic parameter factors, that is, the same IM accident is evaluated by multiple key response characteristic parameter factors, and therefore, the value of each key response characteristic parameter factor may fall in the value interval corresponding to different reaction intensity levels, and the influence of each key response characteristic parameter factor needs to be considered to evaluate the reaction intensity of the IM accident.

[0122] Further, although the values of multiple key response characteristic parameter factors corresponding to the same IM accident of the same type of ammunition warhead may fall in the value interval corresponding to different reaction intensity levels, they basically will not exceed 2 reaction intensity levels. Assuming that the number of key response characteristic parameter factors corresponding to a certain ammunition warhead is n, the values of n1 key response characteristic parameter factors fall in the value interval corresponding to the Nth reaction intensity level, and the values of n-n1 key response characteristic parameter factors fall in the value interval corresponding to the N+1th reaction intensity level, then the expression of the comprehensive reaction intensity number is:

[0123]

[0124] wherein A z represents the comprehensive reaction intensity number, x j represents the weight coefficient corresponding to the jth key response characteristic parameter factor, [A z ] represents the integer part of A z , δ represents the decimal part of A z , N z represents the reaction intensity level of the IM accident, and Φ Nz represents the reaction severity corresponding to the reaction intensity level of the IM accident.

[0125] It should be noted that the weight factor is determined according to the reliability of the response characteristic parameter test result corresponding to the key response characteristic parameter factor and the correlation degree thereof with the IM accident.

[0126] For example, assuming that the number of key response characteristic parameter factors corresponding to a certain ammunition warhead is 4, the values of 2 key response characteristic parameter factors fall in the value interval corresponding to the 2nd reaction intensity level (i.e., explosion), and Φ N，1 = 0.1, Φ N，2 = 0.15; the values of the other 2 key response characteristic parameter factors fall in the value interval corresponding to the 3rd reaction intensity level (i.e., deflagration), and Φ N，3 = 0.80, Φ N，4 = 0.75.

[0127] Case 1: If the value of the weight factor x j is as follows: [x jIf ] = [0.35, 0.4, 0.15, 0.2], then the comprehensive reaction intensity number is:

[0128]

[0129] At this point, the reaction intensity level of the IM accident is 2, which is an explosion; the corresponding reaction severity is 4%, which is a low-intensity explosion reaction.

[0130] Case 2: If the weighting factor x j The values ​​of are as follows: [x j If ] = [0.10, 0.15, 0.45, 0.3], then the comprehensive reaction intensity number is:

[0131]

[0132] At this point, the reaction intensity level of the IM accident is 3, which is deflagration; the corresponding reaction severity is 86.75%, which is a relatively strong deflagration reaction.

[0133] Understandably, existing methods for assessing the reaction intensity of munitions in IM (Instantaneous Motion) accidents rely on expert experience to qualitatively determine the reaction intensity. This invention, based on a table comparing reaction intensity levels with key response characterization parameters, derives corresponding severity factors from these parameters. Based on these severity factors and reaction intensity levels, it obtains corresponding reaction intensity numbers. Finally, based on weighting coefficients and the reaction intensity numbers, it obtains a comprehensive reaction intensity number, thereby deriving the reaction intensity level of an IM accident and the corresponding severity of the reaction. This achieves a quantitative description of the reaction intensity level of munitions in typical accidents and the severity of the reaction within that level, solving the problem of the inability to continuously measure the reaction intensity of munitions and providing a foundation for promoting the development of insensitive munitions.

[0134] Compared with existing technologies, the beneficial effects of the multi-parameter factor quantitative evaluation method for ammunition reaction intensity provided by this invention are as follows:

[0135] 1. This invention obtains corresponding response characterization parameter factors based on the obtained response characterization parameters during detonation and IM accident reactions using a comparative method. It innovatively proposes a multi-response characterization parameter factor system for reaction intensity, providing a foundation for subsequent continuous measurement of ammunition reaction intensity.

[0136] 2. This invention obtains the corresponding degree factor based on the comparison table of reaction intensity level and key response characterization parameter factors and the response characterization parameter factors. Based on the degree factor and reaction intensity level, the corresponding reaction intensity number is obtained. Based on the weighting coefficient and the reaction intensity number, the comprehensive reaction intensity number is obtained. Thus, the reaction intensity level of IM accident and the reaction severity corresponding to the reaction intensity level are obtained. This enables a quantitative description of the reaction intensity level of ammunition in typical accidents and the reaction severity within that reaction intensity level. It solves the problem of not being able to continuously measure the reaction intensity of ammunition and provides a foundation for promoting the development of insensitive ammunition.

[0137] Those skilled in the art will understand that all or part of the processes of the methods described in the above embodiments can be implemented by a computer program instructing related hardware, and the program can be stored in a computer-readable storage medium. The computer-readable storage medium may be a disk, optical disk, read-only memory, or random access memory, etc.

[0138] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for quantitatively evaluating a multi-parameter factor of ammunition reaction intensity, characterized in that, The method comprises the following steps: Defining ammunition reaction intensity grades, obtaining response characteristic parameters at the highest ammunition reaction intensity grade and response characteristic parameters at the IM accident reaction time; Obtaining the response characteristic parameter factor corresponding to the IM accident through a comparison method based on the response characteristic parameters at the highest ammunition reaction intensity grade and the response characteristic parameters at the IM accident reaction time; Establishing a contrast table of the reaction intensity grades corresponding to different types of ammunition warheads and the key response characteristic parameter factors according to the test data; Obtaining the degree factor corresponding to each key response characteristic parameter factor based on the contrast table and the response characteristic parameter factor, obtaining the corresponding reaction intensity number based on the degree factor corresponding to each key response characteristic parameter factor and the reaction intensity grade, obtaining the weight coefficient corresponding to each key response characteristic parameter factor based on the type of ammunition warhead, obtaining the comprehensive reaction intensity number based on the reaction intensity number corresponding to each key response characteristic parameter factor and the weight coefficient, and further obtaining the reaction intensity grade of the IM accident and the reaction severity degree corresponding to the reaction intensity grade.

2. The method for quantitative evaluation of ammunition reaction intensity using multiple parameters according to claim 1, characterized in that, The expression of the degree factor corresponding to each key response characteristic parameter factor is: wherein, Φ N，j denotes the degree factor corresponding to the jth key response characteristic parameter factor, a N，j denotes the lower limit value corresponding to the jth key response characteristic parameter factor in the reference table, a N+1,j denotes the upper limit value corresponding to the jth key response characteristic parameter factor in the reference table, a j denotes the value of the jth key response characteristic parameter factor.

3. The method for quantitative evaluation of ammunition reaction intensity using multiple parameters according to claim 2, characterized in that, The expression of the reaction intensity number is: A j = N j - Φ N,j , (15) wherein A j represents the reaction intensity number corresponding to the jth key response characteristic parameter factor, N j represents the reaction intensity grade corresponding to the jth key response characteristic parameter factor.

4. The method according to claim 3, wherein the method is characterized by, Supposing that the number of the key response characteristic parameter factors corresponding to a certain ammunition warhead is n, wherein the values of n1 key response characteristic parameter factors fall within the value interval corresponding to the Nth reaction intensity grade, and the values of n-n1 key response characteristic parameter factors fall within the value interval corresponding to the N+1th reaction intensity grade, the expression of the comprehensive reaction intensity number is: wherein A z represents the comprehensive reaction intensity number, x j represents the weight coefficient corresponding to the jth key response characteristic parameter factor, [A z ] represents the integer part of A z , δ represents the decimal part of A z , N z represents the reaction intensity grade of the IM accident, Φ Nz represents the reaction intensity grade corresponding to the reaction intensity of the IM accident.

5. The method according to claim 1, wherein the method is characterized by, The response characteristic parameter factor comprises a shock wave overpressure factor, an impulse factor, a charge reaction degree, a shell expansion speed factor, a specific kinetic energy factor, a specific kinetic energy rate factor, an expansion acceleration factor, a fragment speed factor, a fragment kinetic energy factor, and a natural fragment size factor.

6. The method according to claim 5, wherein the method is characterized by, The shock wave overpressure factor and the impulse factor are obtained through the following expressions: where ε p represents the peak value of the air shock overpressure at the IM incident response time, ΔP m represents the peak value of the air shock overpressure at the detonation, ε mdet represents the peak value of the air shock overpressure at the detonation, ε I represents the impulse factor, I represents the air shock impulse at the IM incident response time, I det represents the air shock impulse at the detonation, t+ represents the action time of the positive pressure at the IM incident response time, t det + represents the action time of the positive pressure at the detonation, ΔP(t) represents the air shock overpressure at the IM incident response time t, ΔP det (t) represents the air shock overpressure at the detonation t.

7. The method according to claim 5, wherein the method is characterized by, The shell expansion speed factor is obtained through the following expression: where ε U represents the maximum value of the shell expansion velocity at the time of IM accident response, U m represents the maximum value of the shell expansion velocity at the time of IM accident response, U mdet represents the maximum value of the shell expansion velocity at the time of IM accident response, U 8. The method according to claim 5, wherein the method is characterized by, The specific kinetic energy factor is obtained through the following expression: where ε ev represents the specific kinetic energy factor, E vIM represents the specific kinetic energy of the shell at the time of IM accident reaction, E vdet represents the specific kinetic energy of the shell at the time of explosion, p m represents the shell material density.

9. The method according to claim 5, wherein the method is characterized by, The fragment speed factor is obtained through the following expression: where ε v represents the fragment velocity factor, V0represents the initial velocity of the fragments produced at the time of the IM accident response, and V 0det represents the initial velocity of the fragments produced at the time of the explosion.

10. The method of claim 1, wherein the method is characterized by: The characteristic parameter comprises an air shock wave overpressure, an air shock wave impulse, a shell expansion speed, a fragment speed, a fragment characteristic size, and a verification plate trace.

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