A method for quantitatively evaluating multi-parameter factors of ammunition reaction intensity

Abstract

The present application relates to a kind of ammunition reaction intensity multi-parameter factor quantitative evaluation method, belong to the technical field of projectile explosive. Including: obtaining the response characterization parameter when and IM accident reaction of ammunition detonation;Response characterization parameter factor corresponding to IM accident is obtained based on response characterization parameter;Based on response characterization parameter factor and test data, the reaction intensity grade corresponding to the key response characterization parameter factor of different types of ammunition warhead is established with contrast table;Based on the contrast table, key response characterization parameter factor and reaction intensity grade, the degree factor corresponding to key response characterization parameter factor, reaction intensity number are obtained;Based on weight coefficient and reaction intensity number, the reaction intensity grade and reaction severity of IM accident are obtained.The method establishes the degree factor corresponding to key response characterization parameter factor and reaction intensity number, establishes the reaction intensity multi-parameter factor quantitative evaluation method, solves the problem that typical ammunition reaction intensity cannot be continuously measured.

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 it is impossible to continuously measure the reaction intensity of ammunition.

[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, obtain the response characterization parameters when the ammunition reaches the highest reaction intensity level, and obtain 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 test 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 A z The integer part, δ, represents A. z The decimal part of N z Φ indicates the severity level of the response to an IM incident. Nz This indicates the severity of the response corresponding to the IM incident response intensity level.

[0020] Furthermore, the response characterization parameters include: shock wave overpressure factor, impulse factor, charge responsiveness, shell expansion rate 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.

[0021] Furthermore, the shock wave overpressure factor and impulse factor are obtained through the following expressions:

[0022]

[0023] 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 barotropic 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.

[0024] Furthermore, the shell expansion rate factor is obtained through the following expression:

[0025]

[0026] Where, ε U U represents the shell expansion rate factor. m U represents the maximum rate of shell expansion during an IM accident response. mdet This represents the maximum rate of shell expansion during detonation.

[0027] Furthermore, the specific kinetic energy factor is obtained through the following expression:

[0028]

[0029] Where, ε ev E represents the specific kinetic energy factor. vIME 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.

[0030] Furthermore, the fragment velocity factor is obtained through the following expression:

[0031]

[0032] Where, ε v V represents the fragment velocity factor, where V0 represents the initial velocity of the fragments generated during the IM accident response. 0det This indicates the initial velocity of the fragments produced during detonation.

[0033] Furthermore, the characterization parameters include: air shock wave overpressure, air shock wave impulse, shell expansion velocity, fragment velocity, fragment characteristic size, and verification plate traces.

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

[0035] 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.

[0036] 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.

[0037] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages may become apparent from the description or be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained from what is particularly pointed out in the description and drawings. Attached Figure Description

[0038] The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0039] Figure 1 This is a flowchart of the multi-parameter factor quantitative evaluation method for ammunition reaction intensity according to an embodiment of the present invention;

[0040] Figure 2 This is a schematic diagram illustrating the classification of reaction intensity levels in an embodiment of the present invention. Detailed Implementation

[0041] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0042] A specific embodiment of the present invention discloses a method for quantitatively evaluating the intensity of ammunition reaction using multiple parameters. For example... Figure 1 As shown, the method includes the following steps:

[0043] Step S1: 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.

[0044] Step S2: Based on the response characterization parameters at the highest reaction intensity level of the ammunition and the response characterization parameters during the IM accident response, the response characterization parameter factors corresponding to the IM accident are obtained by comparison.

[0045] Step S3: Based on the response characterization parameter factors and experimental data, establish a comparison table of response intensity levels and key response characterization parameter factors corresponding to different types of ammunition warheads;

[0046] Step S4: Based on the reference table and response characterization parameter factors, obtain the degree factor corresponding to the key response characterization parameter factors; based on the degree factor corresponding to the key response characterization parameter factors and the response intensity level, obtain the corresponding response intensity number; based on the type of munition warhead, obtain the weight coefficient corresponding to the key response characterization parameter factors; based on the response intensity number corresponding to the key response characterization parameter factors and the weight coefficient, obtain the comprehensive response intensity number, and then obtain the response intensity level of the IM accident and the severity of the response corresponding to the response intensity level.

[0047] Specifically, in step S1, the ammunition reaction intensity level refers to the level of ammunition's reaction to various stimuli, classified according to the severity of its reaction. The ammunition reaction intensity level is defined as levels I to V, from highest to lowest reaction intensity, including: Level I detonation, Level II explosion, Level III deflagration, Level IV combustion, and Level V no reaction.

[0048] Furthermore, the characterization parameters include: air shock wave overpressure, air shock wave impulse, shell expansion velocity, fragment velocity, fragment characteristic size, and verification plate marks. Among these, the response characterization parameter for detonation at the highest reaction intensity level of the munition is expressed as: air shock wave overpressure ΔP. det Air shock wave impulse I det , shell expansion velocity U det Fragmentation velocity V det Fragment characteristic size det Verification board traces det The response parameters during an IM accident 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 an IM accident refers to a non-impact ignition accident, excluding impact detonation, caused by unexpected stimuli during the transportation, storage, and use of munitions, such as fragment impact, rapid heating, or slow heating.

[0050] Specifically, response characterization parameters during the detonation at the highest reaction intensity level of the ammunition and response characterization parameters during the IM accident reaction are obtained through experimental measurements or authoritative experimental data.

[0051] It should be noted that the response characterization parameters of the ammunition at its highest reaction intensity level are obtained through static explosion tests or test data provided by the ammunition development unit. The response characterization parameters of the ammunition during an IM accident are obtained through IM accident measurements.

[0052] In practice, the curve of air shock wave overpressure versus time is measured using a piezoelectric sensor, the curve of ammunition casing expansion velocity versus time is measured using a PDV velocity testing system, and the initial velocity of ammunition casing fragments is measured using a net target system. The peak value of the air shock wave overpressure and the maximum value of the casing expansion velocity can be obtained from the curves of air shock wave overpressure versus time and the curves of ammunition casing expansion velocity versus time.

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

[0054] Specifically, in step S2, the response characterization parameters include: shock wave overpressure factor, impulse factor, charge responsiveness, shell expansion rate 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 barotropic 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 The relationship between the effective reactive explosive weight ω of the warhead and the explosive weight ω conforms to the following expression:

[0066]

[0067] Where ω is the effective reactive explosive weight of the warhead (unit: kg), α is the warhead loading coefficient, γ is the polyhedral index of the charge, r0 is the warhead radius (unit: cm), and r m The fragmentation radius of the warhead (unit: cm).

[0068] It should be noted that the warhead refers to the part of the munition used to directly damage the target, mainly including the casing, explosive charge, and detonation device. The casing houses the explosive charge and connects to the fuse; the explosive charge is usually composed of high-energy explosives and is used to damage the target; the detonation device controls the detonation of the explosive charge. The fragmentation radius of the warhead is the radius of the warhead when the fragments reach their maximum velocity. From the above formula, we can determine the radius of the warhead based on ω... be α, γ, r0, r m To calculate ω.

[0069] Specifically, the reactivity of the charge is obtained through the following expression:

[0070]

[0071] Where λ represents the reactivity of the charge, W R Let represent the effective charge mass of the warhead in an IM accident, and W represent the total charge mass of the warhead; where...

[0072]

[0073] Wherein, β represents the TNT shock wave equivalent coefficient of the charge formulation.

[0074] It should be noted that the above method for calculating the charge reactivity is only applicable to explosions or relatively violent deflagrations. For weaker deflagrations or combustions, since the proportion of the shell's kinetic energy is greatly reduced compared to the detonation state, the above ω... be The relationship with ω is not applicable. In this case, the total energy method can be used to determine the charge reaction degree based on the shell / fragment velocity and fragmentation data during the IM accident response.

[0075] Furthermore, the shell expansion rate factor is obtained through the following expression:

[0076]

[0077] Where, ε U U represents the shell expansion rate factor.m 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] Furthermore, the fragment velocity factor is obtained through the following expression:

[0092]

[0093] Where, ε v V represents the fragment velocity factor, where V0 represents the initial velocity of the fragments generated during the IM accident response. 0det This indicates the initial velocity of the fragments produced during detonation.

[0094] It should be noted that the velocity of the fragments formed after the casing fractures is a key response parameter characterizing the intensity of the reaction. The fragments produced by ammunition include pre-formed fragments and semi-pre-formed fragments. Pre-formed fragments refer to fragments that are pre-shaped during the ammunition manufacturing process and have specific shapes, sizes, and masses. Semi-pre-formed fragments refer to fragments whose shape, size, and number are predetermined by controlling the fracture mode of the casing. The fragment velocity factor described applies to both pre-formed and semi-pre-formed fragments.

[0095] Furthermore, the fragment kinetic energy factor is obtained through the following expression:

[0096]

[0097] Where, ε k E represents the kinetic energy factor of the fragment. kIM E represents the kinetic energy of the fragments generated during the IM accident response. kdet It represents the kinetic energy of the fragments produced during detonation.

[0098] Furthermore, the natural fragment size factor is obtained through the following expression:

[0099]

[0100] or,

[0101]

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

[0103] Understandably, this invention obtains corresponding response characterization parameter factors based on the obtained detonation and IM accident response parameters through a comparative method, and innovatively proposes a multi-response characterization parameter factor system for response intensity, providing a foundation for subsequent continuous measurement of ammunition response intensity.

[0104] Specifically, in step S3, the warhead of the munition can be classified into high-explosive fragmentation warheads, high-explosive fragmentation warheads, high-explosive penetration warheads, and shaped charge warheads based on their damage modes and warhead structures. Different types of warheads have different damage modes and structures, resulting in differences in the form of energy output during an IM accident response. Therefore, the corresponding response intensity response characterization parameter factors also differ. Even for the same response characterization parameter factor, different munition warheads have different value ranges.

[0105] Specifically, Tables 2, 3, and 4 list the corresponding reaction intensity levels and key response characterization parameters for explosive warheads, blasting warheads, and penetrating warheads, respectively.

[0106] Table 2. Comparison of Reaction Intensity Level and Key Response Characterization Parameters for High-Explosive Chronosphere Warheads

[0107]

[0108] Table 3. Comparison of Reaction Intensity Level and Key Response Characterization Parameters for Explosive Warheads

[0109]

[0110] Table 4. Comparison of Reaction Intensity Levels and Key Response Characterization Parameters for Intrusive Warheads

[0111]

[0112] It should be noted that the value ranges (i.e., upper and lower limits) of each key response characterization parameter factor in Tables 2-4 are obtained based on a large amount of existing experimental data and can be adjusted based on a larger amount of experimental data. As shown in Tables 2-4, the key response characterization parameters differ depending on the type of warhead. The selection of key characterization parameter factors is determined based on the work characteristics of the warhead's external action. Tables 2-4 only list typical key response characterization parameter factors; other corresponding response characterization parameter factors can be added as needed.

[0113] In practice, the key response characterization parameter factors are first determined according to the type of munition warhead. Then, the values ​​of the key response characterization parameters and key response characterization parameter factors corresponding to the IM accident are obtained through experimental measurements or authoritative experimental data. Finally, the value range of the key response characterization parameter factors is obtained through the comparison table of the reaction intensity level corresponding to the type of munition warhead and the key response characterization parameter factors.

[0114] Specifically, in step S4, in order to better quantify the severity of the response corresponding to the response intensity level of an IM accident through key response characterization parameter factors, 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 munition warhead corresponds to multiple key response characterization parameters. That is, the response intensity of the same IM accident is evaluated by multiple key response characterization parameters. Therefore, the values ​​of each key response characterization parameter may fall within the value range corresponding to different response intensity levels. It is necessary to comprehensively consider the influence of each key response characterization parameter to evaluate the response intensity of the IM accident.

[0122] Furthermore, although the values ​​of multiple key response characterization parameters corresponding to the same IM accident for the same type of ammunition warhead may fall within the value range corresponding to different reaction intensity levels, they will generally not exceed two reaction intensity levels. Assuming that the number of key response characterization parameters corresponding to a certain ammunition warhead is n, where n1 key response characterization parameters fall within the value range corresponding to the Nth reaction intensity level, and n-n1 key response characterization parameters fall within the value range corresponding to the N+1th reaction intensity level, then the expression for the comprehensive reaction intensity number is:

[0123]

[0124] 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. [A z ] represents A z The integer part, δ, represents A. z The decimal part of N z Φ indicates the severity level of the response to an IM incident. Nz This indicates the severity of the response corresponding to the IM incident response intensity level.

[0125] It should be noted that the weighting factors are determined based on the reliability of the test results of the response characterization parameters corresponding to the key response characterization parameters and their correlation with IM incidents.

[0126] For example, suppose that the number of key response characterization parameters corresponding to a certain munition warhead is 4, of which the values ​​of 2 key response characterization parameters fall within the value range corresponding to the second level of reaction intensity (i.e., explosion), and Φ N，1 =0.1, Φ N，2 =0.15; the values ​​of the other two key response characterization parameters fall within the value range corresponding to the third level of reaction intensity (i.e., deflagration), and Φ N，3 =0.80, Φ N，4 =0.75.

[0127] Case 1: If the weighting factor x j The values ​​of are 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 the intensity of ammunition reaction using multiple parameters, characterized in that, The method includes the following steps: 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; Based on the response characterization parameters at the highest reaction intensity level of the ammunition and the response characterization parameters during the IM accident, the response characterization parameter factors corresponding to the IM accident are obtained by comparison. The response characterization parameter factors include: shock wave overpressure factor, impulse factor, charge reaction degree, shell expansion rate 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. 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. 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. The expression for the degree factor corresponding to each key response characterization parameter is as follows: ，(14) in, This represents the degree factor corresponding to the j-th key response characterization parameter. This represents the upper limit value of the j-th key response characterization parameter factor corresponding to level N in the lookup table. This represents the lower limit value of the j-th key response characterization parameter factor corresponding to level N in the reference table. This represents the value of the j-th key response characterization parameter factor; The expression for the reaction intensity number is: ，(15) in, This represents the response intensity number corresponding to the j-th key response characterization parameter. This represents the reaction intensity level corresponding to the j-th key response characterization parameter factor; 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: ，(16) in, This indicates the overall reaction intensity score. This represents the weight coefficient corresponding to the j-th key response characterization parameter factor. , express The integer part, express The decimal part, Indicates the severity level of the response to an IM incident. This indicates the severity of the response corresponding to the IM incident response intensity level.

2. The method for quantitative evaluation of ammunition reaction intensity using multiple parameters according to claim 1, characterized in that, The shock wave overpressure factor and impulse factor are obtained through the following expressions: ，(1) in, Indicates the shock wave overpressure factor. This represents the peak value of the air shock wave overpressure during an IM accident response. This represents the peak value of the overpressure of the air shock wave during detonation. Indicates the impulse factor. This indicates the impulse of the air shock wave during the IM accident response. This represents the impulse of the air shock wave during detonation. This indicates the duration of positive pressure during the IM accident response. Indicates the duration of the barotropic pressure during detonation. This represents the air shock wave overpressure at time t during the IM accident response. This represents the overpressure of the air shock wave at time t during detonation.

3. The method for quantitative evaluation of ammunition reaction intensity using multiple parameters according to claim 1, characterized in that, The shell expansion rate factor is obtained through the following expression: ，(6) in, Indicates the shell expansion rate factor. This represents the maximum rate of shell expansion during the IM accident response. This represents the maximum rate of shell expansion during detonation.

4. The method for quantitative evaluation of ammunition reaction intensity using multiple parameters according to claim 1, characterized in that, The specific kinetic energy factor is obtained through the following expression: ，(7) in, Indicates the specific kinetic energy factor. This represents the specific kinetic energy of the shell during the IM accident response. This represents the specific kinetic energy of the shell during detonation. Indicates the density of the shell material. This represents the maximum rate of shell expansion during the IM accident response. This represents the maximum rate of shell expansion during detonation.

5. The method for quantitative evaluation of ammunition reaction intensity using multiple parameters according to claim 1, characterized in that, The fragment velocity factor is obtained through the following expression: ，(10) in, Indicates the fragment velocity factor. This indicates the initial velocity of the fragments generated during the IM accident response. This indicates the initial velocity of the fragments produced during detonation.

6. The method for quantitative evaluation of ammunition reaction intensity using multiple parameters according to claim 1, characterized in that, The characterization parameters include: air shock wave overpressure, air shock wave impulse, shell expansion velocity, fragment velocity, fragment characteristic size, and verification plate traces.

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