CN110688727B - Bulletproof steel plate service life simulation calculation method - Google Patents
Bulletproof steel plate service life simulation calculation method Download PDFInfo
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Abstract
The invention discloses a life simulation calculation method for a bulletproof steel plate, relates to a method for determining the life of the bulletproof steel plate, and particularly relates to a method for calculating the life of the bulletproof steel plate by using a computer. The invention relates to a bulletproof steel plate life simulation calculation method, which is characterized in that shooting parameters of a bulletproof steel plate are input into simulation calculation equipment; calculating the service life of the bulletproof steel plate under the criterion of failure judgment of the bulletproof steel plate; or calculating the damage condition of the bulletproof steel plate according to the set shooting times. The method specifically comprises the following steps: step 1, setting parameters; starting simulation computing equipment, and inputting shooting parameters for computing the service life of the bulletproof steel plate in the simulation computing equipment; step 2, calculating a program; and the step 2 calculation program is used for calculating the service life of the bulletproof steel plate and providing a theoretical basis for the bulletproof design of a shooting range, and the step 2 calculation program calculates the service life of the bulletproof steel plate according to the input parameters calculated in the step 1.
Description
Technical Field
The invention discloses a life simulation calculation method for a bulletproof steel plate, relates to a life determination method for the bulletproof steel plate, and particularly relates to a life calculation method for the bulletproof steel plate by using a computer.
Background
The bulletproof steel plate is an important component of a shooting range bulletproof device, and the safety and reliability of shooting range bulletproof design are always one of important technical problems to be faced by shooting range bulletproof design. If the protection cannot be effectively designed, the use of a firing ground is directly influenced, and even the life safety of work or training personnel is endangered; however, at present, the service life of the bulletproof steel plate has no specific research, the calculation of the service life is usually estimated according to the experience of personnel, and great uncertainty exists, so that a new technical means is needed to meet the actual use requirement.
Disclosure of Invention
The invention provides a method for calculating the service life of a bulletproof steel plate, aiming at the problem of insufficient research on the service life of the bulletproof steel plate impacted by bullets in the prior art, and the method can be used for realizing the evaluation of the damage condition of the bulletproof steel plates with different specifications under the impact of bullets and the prediction of the service life of the bulletproof steel plates.
The invention relates to a life simulation calculation method of a bulletproof steel plate, which is characterized in that shooting parameters of the bulletproof steel plate are input into simulation calculation equipment; calculating the service life of the bulletproof steel plate under the failure judgment criterion of the bulletproof steel plate; or calculating the damage condition of the bulletproof steel plate according to the set shooting times.
The method specifically comprises the following steps:
starting simulation computing equipment, and inputting shooting parameters for computing the service life of the bulletproof steel plate in the simulation computing equipment;
the shooting parameters include: the geometric dimension of the bulletproof steel plate, the geometric dimension of a target, the horizontal type of a shooter, bullet impact parameters and a bulletproof steel plate failure judgment criterion;
the calculation program in the step 2 is used for calculating the service life of the bulletproof steel plate and providing a theoretical basis for the bulletproof design of a shooting range, the calculation program in the step 2 calculates the service life of the bulletproof steel plate according to the input parameters calculated in the step 1, and the damage condition of the bulletproof steel plate under the failure judgment criterion of the bulletproof steel plate or certain shooting times is obtained through calculation;
the step 2 calculation program specifically comprises the following 3 steps:
2.1, establishing a bulletproof steel plate mathematical model;
carrying out numerical value dispersion on the bulletproof steel plates in a shooting plane according to the geometric dimensions of the bulletproof steel plates in the step 1, and establishing a bulletproof steel plate mathematical model; that is, a bulletproof steel plate having infinite mass points in a shooting plane is equivalent to a bulletproof steel plate having a limited number of characteristic points in the shooting plane (by dividing the bulletproof steel plate into a plurality of unit cells of equal size as required, the central position of each unit cell is a characteristic point); the continuous deformation of the surface of the bulletproof steel plate caused by the impact of bullets on the bulletproof steel plate is equivalent to the displacement of the characteristic point of the bulletproof steel plate along the thickness direction; calculating the displacement according to the impact depth of the single bullet in the step 1, the impact radius of the single bullet, the impact dispersion coefficient and the shape of the impact pit; when the bullet strikes the same characteristic point of the bulletproof steel plate for many times, the characteristic points are superposed in a displacement mode, and the superposition quantity of the characteristic points is as follows:
wherein
In order to have a coefficient of variation of the impact,
the bullet impact depth at the characteristic point; the bullets are shot for many times, impact different characteristic points of the bulletproof steel plate, the number of the characteristic points suffered from impact is increased, and then the bulletproof steel plate is bulletproofThe elastic area of the steel plate is increased;
2.2 calculating the bullet drop point;
calculating bullet drop points according to the geometric size of the target and the horizontal type of the shooter in the step 1;
2.3 calculating the service life and damage of the bulletproof steel plate;
and (4) calculating the service life and damage condition of the bulletproof steel plate according to the bullet impact parameters in the step (1), the failure judgment criteria of the bulletproof steel plate, the mathematical model of the bulletproof steel plate in the step (2.1), the bullet drop point position in the step (2.2) and the set shooting times.
The method is used for evaluating the service life of the bulletproof steel plate, and provides a theoretical basis for calculating the service life of the bulletproof steel plate impacted by bullets; the method can be applied to the shooting range design to calculate the service life of the bulletproof steel plate, and estimate the replacement period of the bulletproof steel plate according to the shooting use frequency of the shooting range;
the geometric dimensions of the armor plate include the width, height and thickness of the armor plate.
The target geometry includes a target radius.
The shooter level types comprise novice, ordinary, elite, uniform shooting or self-defined shooter levels; and selecting a bullet drop point distribution function formula prestored in the simulation calculation equipment according to the horizontal type of the shooter.
And the bullet impact parameters comprise impact depth, impact radius, impact dispersion coefficient and impact pit shape.
The shape of the impact pit comprises a parabolic shape, a hemispherical shape, a conical shape or a cylindrical shape, and the failure thickness caused on the bulletproof steel plate is different due to the different shapes of the impact pit.
The bullet-proof steel plate failure judgment criterion comprises a failure thickness criterion and a failure area criterion, when the bullet-proof steel plate at a certain characteristic point meets the failure thickness criterion, the unit at the characteristic point is considered to be failed, and when the total area of the failed units reaches the failure area criterion, the bullet-proof steel plate is considered to be totally failed.
The simulation computing equipment is a computer.
The invention has the following specific advantages and beneficial effects:
1. the method has the advantages that a calculation program can be defined by user, parameters in the program can be input into simulation calculation equipment according to actual requirements, and only bullet impact parameters need to be changed for bullet-proof steel plates of different models and bullets of different models; the modes of various shooters in horizontal types are prestored in the simulation computing equipment, different bullet drop point distribution functions in the program can be called by selecting the shooter in horizontal types, the service lives of the shooters in different levels when shooting the bulletproof steel plate are calculated, and the service lives of the bulletproof steel plate are accurately estimated aiming at the shooters in different levels; and on the contrary, the shooter inputs the actual shooting result into the simulation computing equipment, the actual shooting level of the shooter is determined according to the related model in the simulation computing equipment, and the shooter only needs to input the actual shooting parameters and is visual and easy to understand;
2. the program supports multiple times of statistical calculation, multiple times of calculation results can be obtained by defining the calculation times, the service life of the bulletproof steel plate can be comprehensively evaluated through the statistical calculation results, and the more times of statistical calculation are, the closer to the actual service life is, and the closer to the actual requirement is;
3. the program supports two calculation modes of service life calculation and damage calculation of the bulletproof steel plate, the service life calculation mode of the bulletproof steel plate calculates the service life of the bulletproof steel plate through a self-defined bulletproof steel plate failure judgment criterion, and the damage calculation of the bulletproof steel plate calculates the damage condition of the bulletproof steel plate through self-defined shooting times, so that various requirements of designers are met.
The invention has the advantages of convenient use, simple and understandable display result, flexible use, high efficiency-cost ratio and good use and popularization effect, and the service life can be calculated without using a large number of live ammunitions for shooting.
Drawings
Fig. 1 is a schematic structural diagram of a bulletproof steel sheet in the method for calculating a lifetime of a bulletproof steel sheet according to the present invention (the upper right side is an enlarged schematic diagram of the bulletproof steel sheet, and the lower right side is a cross-sectional view of the upper right side enlarged view).
Fig. 2 is a schematic diagram of the mathematical model for the bulletproof steel sheet of the bulletproof steel sheet life calculation method of the present invention (including two calculation modes of the life calculation and the damage calculation of the bulletproof steel sheet).
Fig. 3 is a schematic flow chart of the bullet-proof life calculation of the bullet-proof steel plate in the bullet-proof steel plate life calculation method of the present invention.
Fig. 4 is a schematic flow chart of the ballistic steel damage calculation for a given number of shots in the ballistic steel life calculation method of the invention.
Detailed Description
Embodiments of the present invention are further described below with reference to FIGS. 1-4:
the invention relates to a bulletproof steel plate life simulation calculation method, which is characterized in that shooting parameters of a bulletproof steel plate are input into simulation calculation equipment; calculating the service life of the bulletproof steel plate under the criterion of failure judgment of the bulletproof steel plate; or calculating the damage condition of the bulletproof steel plate according to the set shooting times.
The method specifically comprises the following steps:
starting simulation computing equipment, and inputting shooting parameters for computing the service life of the bulletproof steel plate in the simulation computing equipment;
the shooting parameters include: the geometric dimension of the bulletproof steel plate, the geometric dimension of a target, the horizontal type of a shooter, bullet impact parameters and a bulletproof steel plate failure judgment criterion;
the step 2 computing program is used for computing the service life of the bulletproof steel plate and providing a theoretical basis for the bulletproof design of a shooting range, the step 2 computing program computes the service life of the bulletproof steel plate according to the input parameters computed in the step 1, and the damage condition of the bulletproof steel plate under the failure judgment criterion of the bulletproof steel plate and the service life of the bulletproof steel plate or a certain shooting frequency is obtained through computation;
the step 2 calculation program specifically comprises the following 3 steps:
2.1, establishing a bulletproof steel plate mathematical model;
carrying out numerical value dispersion on the bulletproof steel plates in a shooting plane according to the geometric dimensions of the bulletproof steel plates in the step 1, and establishing a bulletproof steel plate mathematical model; that is, a bulletproof steel plate having infinite mass points in a shooting plane is equivalent to a bulletproof steel plate having a limited number of characteristic points in the shooting plane (by dividing the bulletproof steel plate into a plurality of unit cells of equal size as required, the central position of each unit cell is a characteristic point); the continuous deformation of the surface of the bulletproof steel plate caused by the impact of bullets on the bulletproof steel plate is equivalent to the displacement of the characteristic point of the bulletproof steel plate along the thickness direction; calculating the displacement according to the impact depth of the single bullet in the step 1, the impact radius of the single bullet, the impact dispersion coefficient and the shape of the impact pit; when the bullet strikes the same characteristic point of the bulletproof steel plate for many times, the characteristic points are superposed in a displacement mode, and the superposition quantity of the characteristic points is as follows:
wherein
In order to strike the coefficient of dispersion,
the bullet impact depth at the characteristic point; the bullets are shot for many times, different characteristic points of the bulletproof steel plate are impacted, the number of the impacted characteristic points is increased, and the bullet receiving area of the bulletproof steel plate is further increased;
2.2 calculating the bullet drop point;
calculating bullet drop points according to the geometric size of the target and the horizontal type of the shooter in the step 1;
2.3 calculating the service life and damage of the bulletproof steel plate;
and (3) calculating the service life and damage condition of the bulletproof steel plate according to the bullet impact parameters in the step (1), the failure judgment criteria of the bulletproof steel plate, the step (2.1) of the bulletproof steel plate mathematical model, the step (2.2) of the bullet drop point position and the set shooting times.
The method is used for evaluating the service life of the bulletproof steel plate, and provides a theoretical basis for calculating the service life of the bulletproof steel plate impacted by bullets; the method can be applied to the shooting range design to calculate the service life of the bulletproof steel plate, and estimate the replacement period of the bulletproof steel plate according to the shooting use frequency of the shooting range;
the geometric dimensions of the armor plate include the width, height and thickness of the armor plate.
The target geometry includes a target radius.
The shooter level types comprise novice, ordinary, elite, uniform shooting or self-defined shooter levels; and selecting a bullet drop point distribution function formula prestored in the simulation computing equipment according to the horizontal type of the shooter.
The bullet impact parameters comprise impact depth, impact radius, impact dispersion coefficient and impact pit shape.
The shape of the impact pit comprises a parabola shape, a hemisphere shape, a cone shape or a cylinder shape, and the failure thickness caused on the bulletproof steel plate is different due to the different shapes of the impact pit.
The failure judgment criterion of the bulletproof steel plate comprises a failure thickness criterion and a failure area criterion, when the bulletproof steel plate at a certain characteristic point meets the failure thickness criterion, the unit at the characteristic point is considered to be failed, and when the total area of the failed units reaches the failure area criterion, the bulletproof steel plate is considered to be totally failed.
The simulation computing equipment is a computer.
Examples
The invention adopts a computer simulation method to carry out simulation calculation on the service life of the bulletproof steel plate.
As shown in fig. 1, it is a schematic structural diagram of a bulletproof steel sheet; the bulletproof steel plate with infinite mass points in a shooting plane is equivalent to a bulletproof steel plate with finite characteristic points in the shooting plane; determining a distribution function of the drop points according to the level of the shooter, and randomly acquiring bullet drop points according to the distribution function; the continuous deformation of the surface of the bulletproof steel plate caused by the bullet impacting the bulletproof steel plate is equivalent to the displacement of the characteristic point of the bulletproof steel plate along the thickness direction, the displacement is calculated according to the impact depth, the impact radius, the impact dispersion coefficient and the impact pit shape (the parameters such as the impact depth, the impact radius, the impact dispersion coefficient and the like are calculated according to the performance detection result of the bulletproof steel plate, as shown in table 1), and the characteristic point is superposed by the displacement when the bullet impacts the bulletproof steel plate for many times.
TABLE 1
As shown in fig. 2, after the program is started, the calculation parameters and the software configuration parameters are first input, and then the life calculation or the damage calculation is selected. If the service life calculation is selected, defining the failure criterion of the bulletproof steel plate, and then calculating to obtain a numerical result and a graphic display result; and defining the shooting times if damage calculation is selected, then calculating to obtain a numerical result and a graph display result, and simulating parameters arranged in the calculation equipment to influence the graph display result style.
Example 1
Calculating the life of armor panels
As shown in fig. 3, shooting for the nth (initial value is 1), determining whether the failure thickness at the bullet drop point after shooting meets the failure thickness criterion, if not, determining whether the failure thickness reaches the shooting frequency threshold, and if so, determining whether the current failure area of the bulletproof steel plate meets the failure area criterion; if the criterion of the failure area is not met, judging whether the shooting frequency threshold is reached, if the criterion of the failure area is met, outputting the service life of the bulletproof steel plate for N times and finishing the calculation; and if the number of times of shooting reaches the threshold value, popping up warning information and finishing the calculation, and if the number of times of shooting does not reach the threshold value, carrying out the (N + 1) th shooting.
Example 2
Calculating damage to armor plate
As shown in fig. 4, the shooting frequency is iterated to the set shooting frequency, the failure thickness of each feature point of the bulletproof steel plate is output, the total failure area of the bulletproof steel plate is output according to the failure thickness criterion, whether the failure area criterion is met is judged, if the failure area criterion is met, the bulletproof steel plate is judged to be failed and the calculation is finished, and if the failure area criterion is not met, the bulletproof steel plate is judged not to be failed and the calculation is finished.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto. All technical solutions which are formed by using equivalent substitutions or any changes made on the basis of the equivalent substitutions fall within the protection scope of the present invention.
Claims (10)
1. A simulation calculation method for the service life of a bulletproof steel plate inputs shooting parameters of the bulletproof steel plate in simulation calculation equipment and is characterized in that the service life of the bulletproof steel plate is calculated under the criterion of failure judgment of the bulletproof steel plate; or calculating the damage condition of the bulletproof steel plate according to the set shooting times;
the method specifically comprises the following steps:
step 1, setting parameters;
starting simulation computing equipment, and inputting shooting parameters for computing the service life of the bulletproof steel plate in the simulation computing equipment;
the shooting parameters include: the geometric dimension of the bulletproof steel plate, the geometric dimension of a target, the horizontal type of a shooter, bullet impact parameters and a bulletproof steel plate failure judgment criterion;
step 1, setting parameters, namely selecting a bullet drop point distribution function by setting a shooter level; in the step 1, bullet impact parameters can be input through single shooting test data; the failure judgment criterion of the bulletproof steel plate in the step 1 can be input through artificially judging the safety threshold of the bulletproof steel plate;
step 2, calculating a program;
the calculation program in the step 2 is used for calculating the service life of the bulletproof steel plate and providing a theoretical basis for the bulletproof design of a shooting range, the calculation program in the step 2 calculates the service life of the bulletproof steel plate according to the input parameters calculated in the step 1, and the damage condition of the bulletproof steel plate under the failure judgment criterion of the bulletproof steel plate or certain shooting times is obtained through calculation;
the step 2 calculation program specifically comprises the following 3 steps:
2.1 establishing a bulletproof steel plate mathematical model;
carrying out numerical value dispersion on the bulletproof steel plates in a shooting plane according to the geometric dimensions of the bulletproof steel plates in the step 1, and establishing a bulletproof steel plate mathematical model; the bulletproof steel plate with infinite mass points in a shooting plane is equivalent to a bulletproof steel plate with a limited number of characteristic points in the shooting plane, the bulletproof steel plate is divided into a plurality of unit cells with equal size according to needs, and each unit cell corresponds to one characteristic point; the continuous deformation of the surface of the bulletproof steel plate caused by the impact of bullets on the bulletproof steel plate is equivalent to the displacement of the characteristic point of the bulletproof steel plate along the thickness direction; calculating the displacement according to the impact depth of the single bullet in the step 1, the impact radius of the single bullet, the impact dispersion coefficient and the shape of the impact pit; when the bullet strikes the same characteristic point of the bulletproof steel plate for many times, the characteristic points are superposed in a displacement mode, and the superposition quantity of the characteristic points is as follows:
wherein
In order to strike the coefficient of dispersion,
the bullet impact depth at the characteristic point; the bullets are shot for many times, different characteristic points of the bulletproof steel plate are impacted, the number of the impacted characteristic points is increased, and the bullet receiving area of the bulletproof steel plate is further increased;
2.2 calculating the bullet drop point;
calculating bullet drop points according to the geometric size of the target and the horizontal type of the shooter in the step 1;
2.3 calculating the service life and damage of the bulletproof steel plate;
and (3) calculating the service life and damage condition of the bulletproof steel plate according to the bullet impact parameters in the step (1), the failure judgment criteria of the bulletproof steel plate, the step (2.1) of the bulletproof steel plate mathematical model, the step (2.2) of the bullet drop point position and the set shooting times.
2. The life simulation calculation method of a bulletproof steel plate according to claim 1, characterized in that: the geometric dimensions of the armor plate include the width, height and thickness of the armor plate.
3. The life simulation calculation method of a bulletproof steel sheet according to claim 1, characterized in that: the target geometry includes a target radius.
4. The life simulation calculation method of a bulletproof steel plate according to claim 1, characterized in that: the shooter level types comprise novice, ordinary, elite, uniform shooting or self-defined shooter levels; and selecting a bullet drop point distribution function formula prestored in the simulation computing equipment according to the horizontal type of the shooter.
5. The life simulation calculation method of a bulletproof steel plate according to claim 1, characterized in that: and the bullet impact parameters comprise impact depth, impact radius, impact dispersion coefficient and impact pit shape.
6. The life simulation calculation method of a bulletproof steel plate according to claim 5, characterized in that: the shape of the impact pit comprises a parabola shape, a hemisphere shape, a cone shape or a cylinder shape, and the failure thickness caused on the bulletproof steel plate is different due to the different shapes of the impact pit.
7. The life simulation calculation method of a bulletproof steel plate according to claim 1, characterized in that: the bullet-proof steel plate failure judgment criterion comprises a failure thickness criterion and a failure area criterion, when the bullet-proof steel plate at a certain characteristic point meets the failure thickness criterion, the unit at the characteristic point is considered to be failed, and when the total area of the failed units reaches the failure area criterion, the bullet-proof steel plate is considered to be totally failed.
8. The life simulation calculation method of a bulletproof steel plate according to claim 1, characterized in that: the simulation computing equipment is a computer.
9. The method for calculating the life simulation of the bulletproof steel plate according to claim 1, wherein the method for calculating the life of the bulletproof steel plate comprises the following steps:
carrying out Nth shooting, judging whether the failure thickness at the bullet drop point after shooting meets the failure thickness criterion, if not, judging whether the failure thickness reaches a shooting frequency threshold value, and if so, judging whether the current failure area of the bulletproof steel plate meets the failure area criterion; if the criterion of the failure area is not met, judging whether the shooting frequency threshold is reached, if the criterion of the failure area is met, outputting the service life of the bulletproof steel plate for N times, and finishing the calculation; if the shooting frequency threshold is reached, popping up warning information and finishing calculation, and if the shooting frequency threshold is not reached, carrying out the (N + 1) th shooting; the initial value of N is 1.
10. The method for calculating the life simulation of the bulletproof steel plate according to claim 1, wherein the method for calculating the damage of the bulletproof steel plate is as follows:
firstly, iterating the shooting times to set shooting times, then outputting the failure thickness of each characteristic point of the bulletproof steel plate, outputting the total failure area of the bulletproof steel plate according to the failure thickness criterion, judging whether the failure area criterion is met, judging that the bulletproof steel plate fails and finishing calculation if the failure area criterion is met, and judging that the bulletproof steel plate does not fail and finishing calculation if the failure area criterion is not met.
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