A method for evaluating the damage effectiveness of tanks attacking armored targets

Abstract

The present application provides a method for evaluating the damage effectiveness of a tank against an armored target, the method comprising: taking a target tank as a combat target, analyzing key vulnerable structures; dividing the vulnerable surface of the external armor distribution characteristics according to the different directions of the target tank threatened by the projectile on the battlefield, and establishing a corresponding equivalent target model; calculating the damage probability value of the projectile under the hit condition according to the characteristic parameters of the anti-tank projectile warhead; the projectile includes armor-piercing projectiles and armor-piercing projectiles; and obtaining the damage effectiveness of the projectile against the tank target at different combat distances and attack directions from the overall damage model of the tank. The present application provides a method for calculating the overall damage effectiveness of a tank, which can provide a reference for strike decision-making for tank combat on land battlefields.

Description

Technical Field

[0001] The present application relates to the technical field of damage effectiveness evaluation of armored weapons, and in particular to a method for evaluating the damage effectiveness of a tank attacking an armored target. Background Art

[0002] Wars in the 21st century are wars in the information age, and main battle tanks are still the most important part of the land assault battlefield. In the past, the evaluation of the damage effectiveness of armored targets emphasized the first hit, believing that "hit means damage", but did not focus on the damage after the hit. However, due to the rapid development of science and technology, main battle tanks have greatly improved in both firepower and mobility, and the emergence of various composite armors has also greatly improved their protection capabilities.

[0003] Therefore, how to take both the hit rate and the damage into consideration has become the focus of current research. Summary of the invention

[0004] The present application provides a method for evaluating the damage effectiveness of a tank attacking an armored target, which can be used to solve the problem that the damage situation is not taken into consideration in the prior art.

[0005] The present application provides a method for evaluating the damage effectiveness of a tank attacking an armored target, the method comprising:

[0006] Taking the target tank as the combat object, analyzing the key vulnerable structures; the vulnerable structures include the body structure and the turret structure;

[0007] According to the different directions of the target tanks threatened by projectiles on the battlefield, the vulnerable surface is divided according to the external armor distribution characteristics, and the corresponding equivalent target model is established;

[0008] Calculating the damage probability value of the anti-tank projectile under the condition of hitting the target according to the characteristic parameters of the anti-tank projectile warhead; the projectile includes armor-piercing projectile and armor-piercing projectile;

[0009] Based on the overall damage model of the tank, the damage efficiency of the projectile on the tank target at different combat distances and attack directions is obtained.

[0010] Optionally, a target tank is used as a combat object to analyze its key vulnerable structure, and the method includes:

[0011] Analyze and determine the weapon firepower system protection system, power system, walking system, crew system, and communication system as the system composition of the target tank

[0012] Analyze the hull structure and turret structure that affect the tank's battlefield survivability. The specific contents are as follows:

[0013] The overall layout of the vehicle frame is as follows: the driver's cabin is located under the turret at the front of the vehicle, the middle of the vehicle is the combat compartment, and the power compartment is separated from the vehicle body by a partition; the armor plate on the front of the vehicle body has a large inclination angle, and the probability of being hit is extremely low;

[0014] Turret structure: It is a polyhedron welded type with a flat side. It is installed on the turret seat ring in the center of the vehicle body and can rotate freely 360 degrees. The cast oval turret is difficult to hit and cause damage.

[0015] Optionally, according to different directions of threat from projectiles on the battlefield, the external armor distribution characteristics are divided into vulnerable surfaces, and a corresponding equivalent target model is established. The method includes:

[0016] The main threat directions can be roughly divided into: front, back, above, below and side;

[0017] The vulnerability index of the tank's shell-facing surface should be specified as:

[0018]

[0019] In the formula, m represents the number of vulnerable surfaces divided by the missile-facing surface, S i represents the area of ​​the ith vulnerable region, P i Indicates that the ammunition hits S i The physical meaning of H is the average damage probability of the target after the ammunition hits the frontal surface;

[0020] The overall vulnerability index of the tank is:

[0021]

[0022] in,

[0023] In the formula, k represents the number of the tank's anti-missile surfaces, S j represents the area of ​​the jth missile impact surface, H j represents the vulnerability index of the jth missile-facing surface, β j It represents the ratio of the number of bullets hitting the jth facing surface to the total number of bullets hitting the vehicle during actual combat or exercises.

[0024] Optionally, the damage probability value of the projectile under the hit condition is calculated according to the characteristic parameters of the anti-tank projectile warhead, and the method includes:

[0025] Analysis of the damage mechanism of armor-piercing and armor-piercing shells:

[0026] The DeMar formula is used to calculate and describe the armor-piercing process of long-rod armor-piercing projectiles.

[0027] The thickness of the target plate is determined by the following method:

[0028]

[0029] Where V c is the limit penetration velocity; K is the correction coefficient considering the influence of armor mechanical properties and projectile structure; d is the projectile diameter; b is the target plate thickness; m is the core mass of the projectile; α is the angle formed by the projectile incident direction and the target plate surface normal;

[0030] The static penetration depth of the armor-piercing projectile is determined by the following method:

[0031]

[0032] Where, L m is the static armor penetration depth; β is the empirical coefficient, d k is the diameter of the liner cone; α is half of the liner apex angle, γ is the liner apex angle coefficient, and the relationship between the liner apex angle coefficient and the liner apex angle is shown in Table 1; D is the explosive detonation velocity; v cr is the critical speed of the projectile jet penetrating the target;

[0033] Table 1 Relationship between the top angle coefficient and the top angle of the liner

[0034]

[0035] Calculate the damage probability of armor-piercing and armor-piercing shells:

[0036] Using the target velocity v and the limit penetration velocity V c The ratio of is used to describe the armor-piercing damage efficiency of armor-piercing projectiles:

[0037]

[0038] The damage probability is equivalent to the ratio of the penetration depth of the projectile to the equivalent thickness of the armor hitting the vulnerable surface area i:

[0039]

[0040] Where P APFSDS_i is the damage probability of the armor-piercing projectile hitting the vulnerable surface area i; b APFSDS_i is the equivalent thickness of armor in vulnerable area i;

[0041] The damage probability is equivalent to the ratio of the calculated projectile penetration depth to the equivalent thickness of the armor hitting the vulnerable surface area i:

[0042]

[0043] Where P HEAT_i is the damage probability of the armor-piercing projectile hitting the vulnerable surface area i; b HEAT_iis the equivalent thickness of armor in vulnerable area i.

[0044] Optionally, the overall tank damage model can be used to obtain the damage effectiveness of projectiles on tank targets at different combat distances and attack directions, including:

[0045] Assume that the probability of a tank target being damaged in a battlefield environment is P K It is equal to the probability of hitting the target P H and the probability of damage P under a given hit condition K / H The product of:

[0046] P K =P H P K / H

[0047] For armor-piercing projectiles, P K / H P APFSDS_i ; For armor-piercing shells, P K / H P HEAT i ;

[0048] Based on the different directions of the incoming projectiles, the vulnerable areas of the target tanks are roughly divided into two major areas: the front and the side, which can be further subdivided into ten evenly spaced areas;

[0049] The top event K is the overall damage state of the target tank, and the bottom event is the average damage state of each area. i (i=1,2...10), see Table 2 for details;

[0050] Table 2 Bottom Event Number

[0051]

[0052] The calculation of the top event K is as follows:

[0053] P(K)=P(X1∪X2∪X3...X i )

[0054] =1-(1-P K (X1))(1-P K (X2))...(1-P K (X i ))

[0055] Where i is 10, and according to formula P K =P H P K / H It can be deduced that:

[0056] P(K)=1-(1-P H (X1)P K / H (X1))(1-PH (X2)P K / H (X2))...(1-P H (X 10 ) K / H (X 10 ))

[0057] The main influencing factors for the overall destructive effectiveness of a tank are the attack distance and the attack direction.

[0058] The distance between the two tanks will directly affect the size of the target scoring area, and thus affect the calculation of the first-shot hit rate. At the same time, for armor-piercing projectiles, it will also affect the speed of the projectile hitting the target, thus affecting the calculation of the damage probability.

[0059] The deviation in attack direction changes the projection area of ​​the tank target's external surface relative to the incoming projectile, resulting in different thicknesses of the armor, which in turn affects the calculation of the probability of damage.

[0060] The method provided in the present application provides a method for evaluating the damage effectiveness of a tank attacking an armored target. The method conducts research based on the factors that actually affect the damage to the tank, and comprehensively considers the degree of damage after a hit, replacing the previous situation where only a hit is considered to be damage. It can provide certain help for future battlefield attack decisions, and the invention has certain reference value for attacking other types of tanks. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] Figure 1 A flowchart of a method for evaluating the damage effectiveness of a tank attacking an armored target provided in an embodiment of the present application;

[0062] Figure 2 A diagram of the main firepower indicators of the tank weapon system provided in the embodiment of the present application;

[0063] Figure 3 A curve diagram showing the probability of armor-piercing projectiles damaging the frontal armor of a tank at an attack distance of 2000 meters provided in an embodiment of the present application;

[0064] Figure 4 A curve diagram showing the probability of armor-piercing projectiles damaging the frontal armor of a tank at an attack distance of 3,000 meters provided in an embodiment of the present application;

[0065] Figure 5 A curve diagram showing the probability of armor-piercing projectiles damaging the frontal armor of a tank at an attack distance of 1000 meters provided in an embodiment of the present application;

[0066] Figure 6 A curve diagram showing the probability of armor-piercing projectiles damaging the side armor of a tank at an attack distance of 2000 meters provided in an embodiment of the present application;

[0067] Figure 7A curve diagram showing the probability of armor-piercing projectiles damaging the side armor of a tank at an attack distance of 3,000 meters provided in an embodiment of the present application;

[0068] Figure 8 A curve diagram showing the probability of armor-piercing projectiles damaging the side armor of a tank at an attack distance of 1000 meters provided in an embodiment of the present application;

[0069] Fig. 9 A curve diagram showing the probability of damage to various areas of the frontal armor of a tank by an armor-piercing projectile provided in an embodiment of the present application;

[0070] Fig.10 This is a curve diagram of the damage probability of the armor-piercing projectile provided in the embodiment of the present application to various areas of the tank side armor. DETAILED DESCRIPTION

[0071] The present invention is further described below with reference to the accompanying drawings and specific embodiments.

[0072] Step S101: Taking the target tank as the combat object, analyzing the key vulnerable structures; the vulnerable structures include the body structure and the turret structure;

[0073] based on Figure 2 It can be seen that a tank is composed of a weapon firepower system, a protection system, a power system, a walking system, a crew system, a communication system and other special equipment. The body structure and turret structure that affect the battlefield survivability of the tank are analyzed as follows:

[0074] The overall layout of the vehicle frame is as follows: the cockpit is located under the turret at the front of the vehicle, the middle of the vehicle is the combat compartment, and the power compartment is separated from the vehicle body by a partition. The tilt angle of the armor plate on the front of the vehicle body is almost parallel to the ground. The projection area of ​​the front armor is small and the probability of being hit is extremely low.

[0075] Turret structure: It is a polyhedral welded type with a flat side, installed on the turret seat ring in the center of the vehicle body, and can rotate 360 ​​degrees freely. The cast oval turret achieves an excellent bullet avoidance angle due to its rounded structure, and the small projection area makes it difficult for small-caliber artillery to hit and cause damage.

[0076] Step S102: According to the different directions of the target tank threatened by the projectile on the battlefield, the external armor distribution characteristics are divided into vulnerable surfaces, and a corresponding equivalent target model is established.

[0077] The main threat directions can be roughly divided into: front, rear, top, bottom and side. This method starts from the perspective of the actual battlefield, considers the distribution of armor from the front and side, and divides the vulnerable surface.

[0078] The vulnerability index of the tank's bullet-facing surface (front and side) should be specified as follows:

[0079]

[0080] In the formula, m represents the number of vulnerable surfaces divided by the missile-facing surface, S i represents the area of ​​the ith vulnerable region, P i Indicates that the ammunition hits S i The physical meaning of H is the average damage probability of the target after the ammunition hits the frontal surface.

[0081] The overall vulnerability index of the tank is:

[0082]

[0083] in,

[0084] In the formula, k represents the number of the tank's anti-missile surfaces, S j represents the area of ​​the jth missile impact surface, H j represents the vulnerability index of the jth missile-facing surface, β j It represents the ratio of the number of bullets hitting the jth facing surface to the total number of bullets hitting the vehicle during actual combat or exercises.

[0085] Step S103: Calculate the damage probability value of the anti-tank projectile under the condition of hitting according to the characteristic parameters of the anti-tank projectile warhead, where the projectile includes armor-piercing projectile and armor-piercing projectile.

[0086] The specific steps include:

[0087] Step 3-1: Analyze the damage mechanism of armor-piercing and armor-piercing shells

[0088] The armor-piercing calculation formula is based on a large amount of test data, and comprehensively considers many factors such as the target plate type, target plate material, and projectile material used in the test. This method comprehensively considers the simplicity of calculation and the fact that tank armor materials are mainly homogeneous armor in actual situations, and uses the DeMar formula to calculate and describe the armor-piercing process of long-rod armor-piercing projectiles.

[0089] The basic formula is as follows:

[0090]

[0091] The significance of DeMar's formula is that it can be used to calculate the maximum penetration velocity V required to penetrate a target plate of a given thickness when the projectile structure and ballistic parameters are known. c On the other hand, if the projectile impact velocity and other relevant ballistic parameters are known, they can be used to predict the thickness of the target plate penetrated.

[0092] The thickness of the target plate is determined by the following method:

[0093]

[0094] Where V c is the limit penetration speed (m / s); K is the correction factor considering the influence of armor mechanical properties and projectile structure (for homogeneous armor commonly mounted on tanks, it is generally taken as 2400); d is the projectile diameter (dm); b is the target plate thickness (dm); m is the core mass of the projectile (kg); α is the angle formed by the projectile incident direction and the target plate surface normal (penetration angle)

[0095] The empirical calculation formula for static armor penetration depth is based on relevant references. After calculating the penetration depth, the static armor penetration depth of the armor-piercing projectile is obtained:

[0096]

[0097] Where, L m is the static armor penetration depth; β is the empirical coefficient (related to the armor structure of the liner, generally 1.7), d k is the diameter of the liner cone (mm); α is half of the liner vertex angle (°). A smaller vertex angle can increase the jet head velocity, which is beneficial to increasing the armor penetration depth. For medium and large caliber armor-piercing projectiles, 44° to 65° is generally appropriate; γ is the liner vertex angle coefficient, and its relationship with the liner vertex angle is shown in Table 1; D is the explosive detonation velocity (m / s); v cr is the critical velocity of the projectile jet penetrating the target (m / s)

[0098] Table 1 Relationship between the top angle coefficient and the top angle of the liner

[0099]

[0100] Step 3-2: Calculate the damage probability of armor-piercing and armor-piercing shells

[0101] Armor-piercing projectiles mainly rely on kinetic energy to damage targets. Kinetic energy is only related to the impact velocity. The impact velocity v is related to the limit penetration velocity V. c The ratio of is used to describe the armor-piercing damage efficiency of armor-piercing projectiles:

[0102]

[0103] Where P APFSDS_i is the damage probability of the armor-piercing projectile hitting the vulnerable surface area i; b APFSDS_i is the equivalent thickness of armor in vulnerable area i;

[0104] In order to quantitatively describe the degree of damage to the target tank armor caused by the armor-piercing projectile under the condition of having hit the target, the damage probability is equivalent to the ratio of the calculated projectile penetration depth to the equivalent thickness of the armor hitting the vulnerable surface area i, that is:

[0105]

[0106] Similarly, in order to quantitatively describe the degree of damage to the target tank armor caused by the armor-piercing projectile under the condition that it has hit the target, the damage probability is equivalent to the ratio of the calculated projectile penetration depth to the equivalent thickness of the armor hitting the vulnerable surface area i, that is:

[0107]

[0108] Where P HEAT_i is the damage probability of the armor-piercing projectile hitting the vulnerable surface area i; b HEAT_i is the equivalent thickness of armor in vulnerable area i.

[0109] Step S104: Based on the overall tank damage model, the damage efficiency of the projectile on the tank target at different combat distances and attack directions is obtained.

[0110] Figure 2 This is a relationship diagram between the main indicators of tank firepower and its influencing factors.

[0111] Assume that the probability of a tank target being damaged in a battlefield environment is P K It is equal to the probability of hitting the target P H and the probability of damage P under a given hit condition K / H The product of

[0112] P K =P H P K / H

[0113] For armor-piercing projectiles, P K / H P APFSDS i ; For armor-piercing shells, P K / H P HEAT i .

[0114] According to the different directions of the incoming projectiles, the vulnerable areas of the target tanks are roughly divided into two major areas: the front and the side, which can be further divided into ten evenly distributed areas.

[0115] The top event K is the overall damage state of the target tank, and the bottom event is the average damage state of each area. i The numbers are numbered in the form of (i=1,2...10), see Table 2 for details.

[0116] The calculation of the top event K is shown below.

[0117] P(K)=P(X1∪X2∪X3...X i )

[0118] =1-(1-P K (X1))(1-P K (X2))...(1-PK (X i ))

[0119] Where i is 10, and according to formula P K =P H P K / H It can be deduced that:

[0120] P(K)=1-(1-P H (X1)P K / H (X1))(1-P H (X2)P K / H (X2))...(1-P H (X 10 ) K / H (X 10 ))

[0121] The main influencing factors for the overall destructive effectiveness of a tank are the attack distance and the attack direction.

[0122] The distance between the two tanks will directly affect the size of the target scoring area, and thus affect the calculation of the first-shot hit rate. At the same time, for armor-piercing projectiles, it will also affect the speed of the projectile hitting the target, thus affecting the calculation of the damage probability.

[0123] The deviation in attack direction changes the projection area of ​​the tank target's external surface relative to the incoming projectile, resulting in different thicknesses of the armor, which in turn affects the calculation of the probability of damage.

[0124] The simulation calculation and analysis of this application example include the following specific steps:

[0125] According to the simulation calculations at different attack distances and different attack directions, the damage probability values ​​of armor-piercing projectiles on different areas of the tank armor are obtained on the premise that the target tank has been hit, and the corresponding curves are drawn.

[0126] (1) Armor-piercing projectiles attack the front area of ​​the tank

[0127] from Figure 3It can be seen from the figure that when the enemy tank uses armor-piercing projectiles to attack the front of the enemy target tank 2000 meters away, and the impact speed v is about 1600m / s, as the penetration angle continues to increase, the probability of the projectile damaging the armor of various areas on the front of the tank shows an overall decreasing trend. Among them, no matter how the penetration angle changes, the probability of armor-piercing projectiles damaging the tracks always remains 100%, which means: if a shot on the battlefield can hit the opponent's tracks, then the enemy tank will immediately lose its mobility, and it can be considered that "hitting means complete damage." In fact, if the enemy and our tanks are at the same height, it is difficult to aim at the tracks due to the influence of the turret's pitch angle and the height of the tank body from the ground. Therefore, the more common situation is to use anti-tank mines to give the tank chassis and tracks very serious damage. In addition, only when the penetration angle is less than a certain angle can armor-piercing projectiles cause serious damage to the upper armor of the tank body. Since the depleted uranium armor is introduced in the lower front area of ​​the tank body, the front of the turret and the gun shield area, these two areas will be completely penetrated when hit. Therefore, choosing the right shooting direction and aiming at the tank armor area can effectively increase the probability of damaging the tank.

[0128] Next, we will change the combat distance of the tank and obtain the damage of the armor-piercing projectile to the front area of ​​the target tank at the attack distance of 3000 meters and 1000 meters, respectively. Figure 4 , Figure 5 shown.

[0129] and Figure 5 By comparison, it can be seen that as the attack distance increases, the impact speed of the armor-piercing projectile decreases, and the penetration depth of the tank armor also decreases. At a distance of 3,000 meters, it is known that the probability of the enemy tank's front being damaged is about 50% when hitting at the most ideal angle. When the attack distance is shortened, the probability of damage caused by the armor-piercing projectile to the armor of other areas will increase except for the weakest track.

[0130] (2) Armor-piercing projectiles attack the side area of ​​the tank

[0131] from Figure 6 It can be seen from the figure that when the friendly tank uses armor-piercing projectiles to attack the side of the enemy target tank 2000 meters away, the impact speed v is about 1600m / s. As the penetration angle continues to increase, the probability of armor damage to the armor of various areas on the side of the tank by the armor-piercing projectile continues to decrease. Since the armor of the side wall of the vehicle body is the weakest, once it is hit by a projectile, it will be completely damaged. However, since the side wall of the turret is equipped with depleted uranium armor, no matter at what angle the projectile penetrates, it cannot penetrate the side wall of the turret. In the case of a projectile hitting, the probability of the side wall of the vehicle body being damaged by the projectile is much higher than the side wall of the turret and the running mechanism. Therefore, as the attacker, you should try to aim at the side wall of the enemy tank, while the defender should avoid exposing both sides of the vehicle body to the opponent's field of vision and take the approach of facing the enemy head-on as much as possible.

[0132] Similarly, the combat distance of the tank will be changed below to obtain the damage of the armor-piercing projectile to the side area of ​​the target tank at an attack distance of 3000 meters and 1000 meters, as shown in the following figure: Figure 7 , Figure 8 shown.

[0133] from Figure 7 It can be seen that at a combat distance of 3,000 meters, the threat level of armor-piercing projectiles to the side of the turret is greatly reduced. At a combat distance of 1,000 meters, if the projectile hits the armor area on the side of the turret at an ideal angle, it is very likely that it will completely penetrate it, making the target tank instantly lose its ability to continue combat.

[0134] Step 5-2: Under the premise of a fixed attack distance and the target tank having been hit, simulate and analyze how the probability of damage to the armor of different areas of the tank by the armor-piercing projectile changes with the penetration angle.

[0135] (1) Armor-piercing shells attack the front area of ​​the tank

[0136] from Fig. 9 It can be seen that as the penetration angle of the metal jet of the armor-piercing projectile continues to increase, the probability of the projectile damaging the armor in various areas of the front of the tank is generally on a downward trend. In the most ideal case, the projectile can completely damage any vulnerable area of ​​the front armor. At the same time, no matter how the penetration angle changes, the probability of this type of armor-piercing projectile damaging the tank track always remains 100%. This damage feature is consistent with that of the armor-piercing projectile. The root cause is that the armor protection at the target track of the tank is relatively fragile. In addition, when the penetration angle is too large, the damage value of the armor-piercing projectile to the upper front area of ​​the vehicle body, the front of the turret, and the gun shield area is less than 20%, that is, even if the shell hits the above areas, it can hardly cause substantial damage to the tank.

[0137] (2) Armor-piercing shells attack the side area of ​​the tank

[0138] from Fig.10 It can be seen that only when the penetration angle of the armor-piercing projectile reaches the critical penetration angle, as the penetration angle continues to increase, the probability of armor damage to the armor of the tank side areas will continue to decrease. Therefore, any vulnerable area on the side of the tank target body, once hit by an armor-piercing projectile, is likely to be completely damaged. Similar to armor-piercing shells, the defender should avoid exposing both sides of the vehicle body to the opponent's field of vision, and the attacker should try to aim at the side wall of the enemy tank to achieve the damage target.

Claims

1. A method for evaluating the damage effectiveness of a tank attacking an armored target, characterized in that: The method comprises: Taking the target tank as the combat object, analyzing the key vulnerable structures; the vulnerable structures include the body structure and the turret structure; According to the different directions of the target tank threatened by the projectile on the battlefield, the vulnerable surface is divided according to the distribution characteristics of the external armor, and the corresponding equivalent target model is established; Calculating the damage probability value of the anti-tank projectile under the condition of hitting the target according to the characteristic parameters of the anti-tank projectile warhead; the projectile includes armor-piercing projectile and armor-piercing projectile; Based on the overall damage model of the tank, the damage efficiency of the projectile to the tank target at different combat distances and attack directions is obtained; According to the different directions of the threat from projectiles on the battlefield, the vulnerable surface of the external armor distribution characteristics is divided, and a corresponding equivalent target model is established. The method includes: The main threat directions are roughly divided into: front, rear, above, below and side; The vulnerability index of the tank's shell-facing surface should be specified as: In the formula, m represents the number of vulnerable surfaces divided by the missile-facing surface, S i represents the area of ​​the ith vulnerable region, P i Indicates that the ammunition hits S i The physical meaning of H is the average damage probability of the target after the ammunition hits the frontal surface; The overall vulnerability index of the tank is: in, In the formula, k represents the number of the tank's anti-missile surfaces, S j represents the area of ​​the jth missile impact surface, H j represents the vulnerability index of the jth missile-facing surface, β j It represents the ratio of the number of bullets hitting the jth facing surface to the total number of bullets hitting the vehicle during actual combat or exercises.

2. The method according to claim 1, characterized in that Taking a target tank as a combat object, analyzing its key vulnerable structure, the method includes: Analyze and determine the weapon firepower system protection system, power system, walking system, crew system, and communication system as the system composition of the target tank Analyze the hull structure and turret structure that affect the tank's battlefield survivability. The specific contents are as follows: The overall layout of the vehicle frame is as follows: the driver's cabin is located under the turret at the front of the vehicle, the middle of the vehicle is the combat compartment, and the power compartment is separated from the vehicle body by a partition; the armor plate on the front of the vehicle body has a large inclination angle, and the probability of being hit is extremely low; Turret structure: It is a polyhedron welded type with a flat side. It is installed on the turret seat ring in the center of the vehicle body and can rotate freely 360 degrees. The cast oval turret is difficult to hit and cause damage.

3. The method according to claim 1, characterized in that The damage probability value of the projectile under the hit condition is calculated according to the characteristic parameters of the anti-tank projectile warhead, and the method comprises: Analysis of the damage mechanism of armor-piercing and armor-piercing shells: The DeMar formula is used to calculate and describe the armor-piercing process of long-rod armor-piercing projectiles. The thickness of the target plate is determined by the following method: Where V c is the limit penetration velocity; K is the correction coefficient considering the influence of armor mechanical properties and projectile structure; d is the projectile diameter; b is the target plate thickness; m is the core mass of the projectile; α is the angle formed by the projectile incident direction and the target plate surface normal; The static penetration depth of the armor-piercing projectile is determined by the following method: Where, L m is the static armor penetration depth; β is the empirical coefficient, d k is the diameter of the liner cone; α is half of the liner apex angle, γ is the liner apex angle coefficient, and the relationship between the liner apex angle coefficient and the liner apex angle is shown in Table 1; D is the explosive detonation velocity; v cr is the critical speed of the projectile jet penetrating the target; Table 1 Relationship between the top angle coefficient and the top angle of the liner Calculate the damage probability of armor-piercing and armor-piercing shells: Using the target velocity v and the limit penetration velocity V c The ratio of is used to describe the armor-piercing damage efficiency of armor-piercing projectiles: The damage probability is equivalent to the ratio of the penetration depth of the projectile to the equivalent thickness of the armor hitting the vulnerable surface area i: Where P APFSDS_i is the damage probability of the armor-piercing projectile hitting the vulnerable surface area i; b APFSDS_i is the equivalent thickness of armor in vulnerable area i; The damage probability is equivalent to the ratio of the calculated projectile penetration depth to the equivalent thickness of the armor hitting the vulnerable surface area i: Where P HEAT_i is the damage probability of the armor-piercing projectile hitting the vulnerable surface area i; b HEAT_i is the equivalent thickness of armor in vulnerable area i.

4. The method according to claim 1, characterized in that: Based on the overall damage model of the tank, the damage efficiency of the projectile to the tank target at different combat distances and attack directions is obtained, including: Assume that the probability of a tank target being damaged in a battlefield environment is P K It is equal to the probability of hitting the target P H and the probability of damage P under a given hit condition K / H The product of: P K =P H P K / H For armor-piercing projectiles, P K / H P APFSDSi ; For armor-piercing shells, P K / H P HEATi ; Based on the different directions of the incoming projectiles, the vulnerable areas of the target tanks are roughly divided into two major areas: the front and the side, which can be further subdivided into ten evenly spaced areas; The top event K is the overall damage state of the target tank, and the bottom event is the average damage state of each area. i (i=1,2...10), see Table 2 for details; Table 2 Bottom Event Number The calculation of the top event K is as follows: P(K)=P(X1∪X2∪X3...X i ) =1-(1-P K (X1))(1-P K (X2))...(1-P K (X i )) Where i is 10, and according to formula P K =P H P K / H It can be deduced that: P(K)=1-(1-P H (X1)P K / H (X1))(1-P H (X2)P K / H (X2))...(1-P H (X 10 )P K / H (X 10 )) The main factors affecting the overall damage efficiency of the tank are the attack distance and attack direction. The distance between the two tanks will directly affect the size of the target scoring area, and thus affect the calculation of the first-shot hit rate; at the same time, for armor-piercing projectiles, it will also affect the impact speed of the projectile, thus affecting the calculation of the damage probability; The deviation in attack direction changes the projection area of ​​the tank target's external surface relative to the incoming projectile, resulting in different thicknesses of the armor, which in turn affects the calculation of the probability of damage.

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