A method for calculating damage effect of surface warship based on core function incapacitation

Abstract

The application discloses a kind of water surface warship damage effect calculation method based on core function inactivation, comprising: step S1, component damage effect evaluation knowledge base construction step;Step S2, damage effect rapid calculation step, comprising: obtaining the number of input anti-ship missiles, reading ship overhead profile, killing subzone data, loading anti-ship missile hit probability model and warhead dispersion model, build damage effect calculation scene;Simulate the missile drop point coordinates of anti-ship missile roof attack;Calculate the damage state of key components, including ship surface core facilities and important cabin in the ship;Calculate the function damage state of the whole ship;Assess the damage level and damage probability of the ship.Using the application, the accurate evaluation of ship function damage effect can be quickly realized.

Description

Technical Field

[0001] This invention belongs to the field of damage assessment technology, and in particular relates to a method for calculating the damage effect of surface ships based on the failure of core functions. Background Technology

[0002] Anti-ship missiles, as the most important anti-ship weapon today, have evolved into various forms, including sea-launched, air-launched, submarine-launched, and land-launched types. The rationality and accuracy of ship damage assessment directly impact the scientific formulation of anti-ship missile operational plans and the reasonable prediction of anti-ship missile combat effects.

[0003] Because the attack location and damage method of top-attack are significantly different from those of side-attack, the existing damage assessment methods for cruise missiles cannot be directly applied. Moreover, compared to cruise anti-ship missiles, the organization of live-fire tests is more difficult and costly, and the assessment of damage effects is much more difficult.

[0004] Finite element analysis (FEM) methods, based on three-dimensional finite element models of ships and warhead terminal effect models, construct damage fields of kill elements such as penetrating warheads, shock waves, and fragments. Through intersection analysis of these damage fields with the target, the destructive effects of the kill elements on the ship's structure or components are determined. Damage trees are then used to accurately assess the damage effect on the entire ship target. However, due to the high modeling difficulty, computational complexity, and slow speed of this method, it is mainly used in laboratory environments for assessing the power of anti-ship missile warheads and the vulnerability of ship targets, and cannot be directly applied to actual combat. Theoretical calculation methods, based on the hit probability index of anti-ship missiles against ship targets, the warhead impact point dispersion pattern, and the geometric distribution of key ship components, construct a top-down planar mesh of the ship. Iterative calculations are performed to calculate the number of missiles hitting key components or the proportion of damaged area when different numbers of missiles are launched, quickly calculating the number of missiles that meet the damage requirements and the corresponding damage probability. Although this method is simple to implement and fast, it can only perform estimations, has low accuracy and large errors, and cannot achieve functional damage assessment. Summary of the Invention

[0005] The present invention aims to propose a method for calculating the damage effect of surface ships based on the failure of core functions, so as to quickly and accurately assess the damage effect of ship functions.

[0006] According to a first aspect of the present invention, a method for calculating the damage effect of surface ships is disclosed, comprising:

[0007] Step S1: Construction of the knowledge base for component damage effect assessment;

[0008] Step S2: Rapid calculation of damage effects;

[0009] Step S2, the rapid calculation of damage effects, includes:

[0010] The system obtains the number of anti-ship missiles, reads the ship's top-view profile and kill zone data, loads the anti-ship missile hit probability model and warhead dispersion model, and constructs a damage effect calculation scenario.

[0011] Simulate and generate the missile impact coordinates of an anti-ship missile top-attack;

[0012] Calculate the damage status of key components, including core facilities on the ship's deck and important compartments inside the ship;

[0013] Calculate the functional damage status of the entire ship;

[0014] Assess the damage level and probability of damage to the ship.

[0015] In some other examples, step S1 includes:

[0016] Load the ship's finite element model and the warhead damage model to construct a finite element analysis scenario;

[0017] Read the ship's 3D model, functional damage tree, and damage criteria, and design typical working conditions for finite element analysis to assess the damage effect of key components;

[0018] Calculate and assess the destructive effects of the anti-ship missile warhead on key components;

[0019] Construct a knowledge base for assessing the damage effects of key components.

[0020] In other examples, the damage effect assessment knowledge base includes a ship kill sub-region data table, a ship critical component data table, and a damage effect mapping data table between kill sub-regions and critical components.

[0021] In other examples, the following steps are used to design typical working conditions for finite element analysis to assess the failure effects of critical components:

[0022] Calculate the projection of the ship onto the top plane, generate the ship's top view profile, and establish a target coordinate system with the center point of the ship's top view profile in the length and width directions as the origin.

[0023] Determine the effective kill profile of each core facility on the ship's deck and important compartments inside the ship;

[0024] Overlay the effective kill contours of all key components and divide them according to the contour lines to generate multiple effective kill sub-regions. Record the list of key component numbers corresponding to each kill sub-region.

[0025] For each kill zone, the center point of the zone is taken as the hit position of the anti-ship warhead, and finite element analysis conditions are established to generate a list of finite element analysis conditions.

[0026] In other examples, the projection of the core facility onto the top-view plane is calculated to generate the direct hit kill zone of the core facility; the maximum lateral distance at which an anti-ship warhead can still cause damage to the core facility when it explodes in the air or on the surface of the ship is calculated to generate the indirect hit kill zone of the core facility; the direct hit kill zone and the indirect hit kill zone of the core facility are geometrically joined to obtain the effective kill profile of the core facility.

[0027] In other examples, the projection of the important compartment onto the top-view plane is calculated to generate the direct kill zone of the important compartment; the indirect damage effect of the anti-ship warhead on the important compartment when the surrounding compartments are detonated is calculated. If indirect damage is caused, the projection of the surrounding compartments onto the top-view plane is calculated to generate the local indirect kill zone. After calculating the local indirect kill zones of all surrounding compartments, the indirect kill zone of the important compartment is obtained by geometric union; the direct kill zone and indirect kill zone of the important compartment are geometrically unioned to obtain the effective kill profile of the important compartment.

[0028] In other examples, for each finite element analysis case, the penetration and damage data of the anti-ship missile warhead to the ship's deck and frame structure are calculated;

[0029] Based on the penetration and damage data, the damage effect on the core facilities of the ship's deck is assessed, and it is determined whether it is a direct hit on an important compartment. If so, the direct hit damage effect on the important compartment is assessed; if not, it is determined whether it constitutes indirect hit damage to the important compartment. The overall damage effect on the important compartment is then assessed.

[0030] In other examples, the damage criteria include structural damage criteria and functional damage criteria. The structural damage criteria are the kinetic energy and density thresholds of various lethal elements that cause damage to critical components, while the functional damage criteria are numerical descriptions of the loss of function of critical components caused by different degrees of lethality.

[0031] According to a second aspect of the present invention, a device for calculating the damage effects of surface ships is also disclosed, comprising:

[0032] Memory, used to store a knowledge base for assessing the effects of component damage;

[0033] The calculation unit performs the following steps to achieve rapid calculation of damage effects:

[0034] The system obtains the number of anti-ship missiles, reads the ship's top-view profile and kill zone data, loads the anti-ship missile hit probability model and warhead dispersion model, and constructs a damage effect calculation scenario.

[0035] Simulate and generate the missile impact coordinates of an anti-ship missile top-attack;

[0036] Calculate the damage status of key components, including core facilities on the ship's deck and important compartments inside the ship;

[0037] Calculate the functional damage status of the entire ship;

[0038] Assess the damage level and probability of damage to the ship.

[0039] According to a third aspect of the present invention, a computer-readable storage medium is also disclosed for storing computer instructions, which, when executed by a processor, implement the method for calculating the damage effect of surface ships according to any of the above-described schemes.

[0040] Compared with existing methods, this invention uses the finite element analysis method to generate a knowledge base for accurate assessment of the damage effects on key components / critical compartments. Through simulated target practice and functional damage tree logic operations, it can quickly calculate the damage effect on the entire ship and provide the ammunition requirements for different damage levels, thus enabling rapid and accurate assessment of the functional damage effects on ships. Attached Figure Description

[0041] Other features, objects, and advantages of the invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0042] Figure 1 This is a schematic flowchart of a method for calculating the damage effects of surface ships according to an embodiment of the present invention;

[0043] Figure 2 This is an illustrative flowchart of a method for constructing a knowledge base for evaluating the damage effects of components according to an embodiment of the present invention;

[0044] Figure 3 This is a schematic flowchart illustrating the design of typical working conditions for finite element analysis according to an embodiment of the present invention;

[0045] Figure 4 A schematic flowchart illustrating the rapid calculation steps for damage effects according to an embodiment of the present invention;

[0046] Figure 5 A schematic diagram of a typical nuclear-powered aircraft carrier;

[0047] Figure 6 This is a schematic diagram of the target coordinate system;

[0048] Figure 7 This is a schematic diagram of the working conditions for finite element analysis.

[0049] Figure 8 A schematic diagram of the knowledge base design for assessing the damage effects of critical components;

[0050] Figure 9This is a diagram illustrating the transformation relationship of the "voting" gate. Detailed Implementation

[0051] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0052] Because modern large and medium-sized surface ships are composed of multiple high-strength decks and have strong survivability, anti-ship missiles are unlikely to penetrate the entire ship during a top-attack, making it difficult to directly sink the ship. Instead, they primarily strike key components to disable the ship's core combat functions, thus achieving their operational intent through functional impairment. Based on this, to overcome the shortcomings of existing finite element analysis methods and theoretical calculation methods for top-attacks on ships by anti-ship missiles, this invention discloses a method for calculating the damage effect of surface ships based on the disabling of core functions, such as... Figure 1 As shown, the method includes:

[0053] Step S1, the steps for constructing the knowledge base for component damage effect assessment; and

[0054] Step S2: Rapid calculation of damage effects.

[0055] Among them, such as Figure 2 As shown, step S1 is implemented based on finite element analysis and includes the following steps:

[0056] Step S11: Load the ship finite element model and the warhead damage model to construct the finite element analysis scenario;

[0057] The ship finite element model is used to describe the physical structural characteristics of the ship, including the shape, size, material, and thickness of the hull support structure, deck, compartments, and deck equipment.

[0058] The warhead damage model includes a physical model of the anti-ship missile warhead and a kill element model. The physical model describes the warhead's physical structural properties, including its size, material, thickness, explosive charge material, weight, fragment type and quantity, and the location of the detonation device. The kill element model describes the physical characteristics of different types of kill elements under different damage mechanisms, such as fragment mass m, velocity υ, density ρ, and the time-varying behavior of shock wave overpressure p(t).

[0059] Step S12: Read the ship's 3D model, functional damage tree, and damage criteria, and design typical working conditions for finite element analysis to evaluate the damage effect of key components.

[0060] The ship's three-dimensional model includes a numerical description of the spatial relationships of the ship's outer contour, main structure, main compartments, and various deck facilities.

[0061] The ship's functional damage tree is presented according to different damage levels, for example, including three levels: ship systems, functional subsystems, and critical components. Among them, critical components include two categories: core deck facilities and important internal compartments.

[0062] The damage criteria include structural damage criteria and functional damage criteria. The structural damage criteria are the kinetic energy and density thresholds of various lethal elements causing damage to critical components. The functional damage criteria are numerical descriptions of the loss of function of critical components caused by different degrees of lethality, including the number of fragments reaching the damage threshold per unit area and the ratio of the shock wave coverage area reaching the damage threshold within the critical compartment.

[0063] Among them, such as Figure 3 As shown, the following steps are used to design a typical working condition for finite element analysis to assess the failure effect of critical components:

[0064] Step S121: Calculate the projection of the ship on the top view plane, generate the ship's top view profile, and establish a target coordinate system with the center point of the ship's top view profile in the length and width directions as the origin.

[0065] Step S122: Determine the effective kill profile of each core facility on the ship's deck and important compartments inside the ship;

[0066] For each core facility on the ship's deck, the projection of the core facility onto the top-view plane is calculated to generate its direct kill zone. The maximum lateral distance at which an anti-ship warhead can still cause damage to the core facility upon airburst or surface-to-surface explosion around it is calculated to generate its indirect kill zone. The direct and indirect kill zones of the core facility are geometrically joined to obtain its effective kill profile.

[0067] For each important compartment within the ship, the projection of the important compartment onto the top-view plane is calculated to generate its direct kill zone. The indirect damage effect of an anti-ship warhead on the important compartment when detonated in surrounding compartments is calculated. If indirect damage is achieved, the projection of those surrounding compartments onto the top-view plane is calculated to generate local indirect kill zones. After calculating the local indirect kill zones for all surrounding compartments, the indirect kill zone of the important compartment is geometrically merged. The direct and indirect kill zones of the important compartment are then geometrically merged to obtain its effective kill profile.

[0068] Step S123: Overlay the effective kill contours of all key components, divide them according to the contour lines to generate multiple effective kill sub-regions, and record the list of key component numbers corresponding to each kill sub-region.

[0069] Step S124: For each kill sub-region, with the center point of the sub-region as the hit position of the anti-ship warhead, establish finite element analysis conditions and generate a list of finite element analysis conditions.

[0070] Step S13: Calculate and assess the destructive effect of the anti-ship missile warhead on key components;

[0071] For each finite element analysis case, calculate the penetration and damage data of the anti-ship missile warhead on the ship's deck and frame structure, including the number of penetration layers, the compartments penetrated, the compartments ultimately hit, and the radius of the breach in the deck or bulkhead.

[0072] Based on the penetration and damage data, the damage effect on the core facilities of the ship's deck is assessed, and it is determined whether it is a direct hit on an important compartment. If so, the direct hit damage effect on the important compartment is assessed; if not, it is determined whether it constitutes indirect hit damage to the important compartment. The overall damage effect on the important compartment is then assessed.

[0073] Step S14: Construct a knowledge base for assessing the damage effects of key components.

[0074] The knowledge base for assessing damage effects includes a data table of ship kill zones, a data table of ship key components, and a data table mapping the damage effects of kill zones and key components.

[0075] The ship kill zone data table includes fields such as hull number, kill zone number, and corner coordinates of the kill zone. The ship critical component data table includes fields such as hull number, ship type, ship class, critical component number, critical component name, and three-dimensional coordinates of the critical component. The kill zone and critical component damage effect mapping data table includes fields such as hull number, kill zone number, critical component number, direct hit damage effect of the critical component, and indirect hit damage effect of the critical component.

[0076] The damage sub-area and critical component destruction effect mapping data table is a sub-table of the ship's damage sub-area data table, and a joint foreign key index is established using the hull number and damage sub-area number. The damage sub-area and critical component destruction effect mapping data table is also a sub-table of the ship's critical component data table, and a joint foreign key index is established using the hull number and critical component number.

[0077] Among them, such as Figure 4 As shown, the rapid calculation step for the damage effect includes the following steps:

[0078] Step S21: Obtain the number of anti-ship missiles input, read the ship's top-view outline and kill zone data, load the anti-ship missile hit probability model and warhead dispersion model, and construct a damage effect calculation scenario.

[0079] Step S22: Simulate the impact point of an anti-ship missile;

[0080] For example, the Monte Carlo method is used to simulate and generate the missile impact coordinates of a multi-anti-ship missile top attack.

[0081] If it is a cluster anti-ship missile, the missile's impact coordinates are the mother missile's impact coordinates. Furthermore, based on the mother missile's impact coordinates, the impact coordinates of all the submunitions should be simulated and generated according to the number of submunitions and their dispersion patterns.

[0082] Step S23: Calculate the damage status of key components;

[0083] Specifically, it determines whether the missile or bullet impact point is within the kill zone. If it is, the damage effect assessment knowledge base is searched to retrieve the damage effects of key components associated with that kill zone, quickly determining the damage status of the key components. If it is not within the kill zone, no action is taken.

[0084] Step S24: Calculate the functional damage status of the entire ship;

[0085] Specifically, the ship's functional damage tree model is loaded. Based on the damage status of each critical component and the logical relationship between events in the functional damage tree, the calculation is performed layer by layer starting from the critical component damage event. Finally, a judgment result is given on whether a damage event of a certain damage level has occurred, and all possible damage levels are recorded.

[0086] Step S25: Assess the damage level and probability of damage to the ship.

[0087] Specifically, steps S22 to S24 are repeated to complete the simulation calculation for a set number of times, and the occurrence number of each damage level is counted and divided by the number of simulations to obtain the probability of occurrence.

[0088] The damage level that meets the minimum probability requirement for the event to occur is taken as the achievable damage level. If multiple damage levels meet the requirement, the highest damage level is selected.

[0089] The probability of occurrence corresponding to the damage level is taken as the damage probability result.

[0090] This invention enables the assessment of damage effects from defunctionalized strikes. It can be applied to pre-launch planning of strike missile quantity and prediction of strike effects, as well as to rapid post-strike assessment of damage effects. It can also be applied to the demonstration of anti-ship missile warhead indicators and the evaluation of destructive power.

[0091] The present invention will be further described below through a specific example.

[0092] In this example, a counter-attack missile carrying a penetrating high-explosive warhead performs a top-attack strike on a typical nuclear-powered aircraft carrier. The 3D model of the typical nuclear-powered aircraft carrier is shown below. Figure 5 As shown.

[0093] The ship's functional damage tree is presented according to different damage levels, including four levels: ship mission functions, functional systems, subsystems, and critical components. Critical components are further divided into two categories: core deck facilities and important internal compartments. Considering the characteristics of top-attack and warhead components, the functional damage tree of a typical nuclear-powered aircraft carrier includes carrier-based aircraft functions, aviation support functions, and shipboard combat functions.

[0094] The damage criteria include structural damage criteria and functional damage criteria. Structural damage criteria include fragment kinetic energy and peak shock wave intensity, while functional damage criteria include the number of fragments reaching the damage threshold per unit area and the ratio of shock wave coverage to the damage threshold in critical compartments. Specifically, as an illustration of the calculation process, the damage criteria for a typical nuclear-powered aircraft carrier include:

[0095] (i) Aircraft within 50% to 80% of the hangar area were damaged by the shock wave, with the effective shock wave overpressure threshold for aircraft being 0.2-0.3 MPa.

[0096] (ii) Equipment within 80% of the area of ​​the command and control cabin was damaged by the shock wave, with an effective shock wave overpressure threshold of 0.071-0.086 MPa.

[0097] Calculate the projection of the ship onto the top-view plane, generate the ship's top-view profile, and establish a target coordinate system with the center points of the ship's top-view profile in the length and width directions as the origin, as shown below. Figure 6 As shown.

[0098] Figure 7 This is a schematic diagram of the working conditions for finite element analysis. Figure 8 A schematic diagram of the design of a knowledge base for assessing the damage effects of critical components.

[0099] Figure 9 A rapid calculation process for the damage effects of anti-ship missile top-attacks on ships. As shown in the figure, it includes:

[0100] Step 21: Obtain the number of anti-ship missiles input, read the ship's top-view profile and kill zone data, load the anti-ship missile hit probability model and warhead dispersion model, and construct a damage effect calculation scenario.

[0101] Step 22: Simulate the impact point of an anti-ship missile;

[0102] In this example, the Monte Carlo method is used to simulate and generate the missile impact coordinates of a multi-missile top-attack. If it is a cluster anti-ship missile, the missile impact coordinates are the parent missile's impact coordinates. Furthermore, based on the parent missile's impact coordinates, the impact coordinates of all submunitions should be simulated and generated according to the number of submunitions and their dispersion patterns.

[0103] When using the Monte Carlo method for calculation and analysis, the key is to generate uniformly distributed random numbers on [0, 1]. This invention employs the mixed congruential method, and its iterative formula is as follows:

[0104] y n+1 =ay n +b(modM)

[0105]

[0106] Where a, b, M, and the initial value y0 are all positive integers. In the above formula, (mod M) is the congruence symbol, and the expression A = B (mod M) means that A is the remainder when B is divided by a positive integer M, i.e., B = aM + A. n The numbers are pseudo-random numbers uniformly distributed on [0, 1]. M = 2 K K is the computer word length.

[0107] After generating uniformly distributed random numbers in the interval [0,1], normally distributed random numbers are constructed using direct sampling. A pair of uniformly distributed random numbers r1 and r2 in the interval [0,1] are used to construct a pair of standard normally distributed random numbers according to the following mathematical formula:

[0108]

[0109]

[0110] y1 and y2 follow a two-dimensional standard normal distribution, and their density function is:

[0111]

[0112] The general form of the normal distribution can be obtained through the following transformation:

[0113] x1=μ1+σ1·y1

[0114] x² = μ² + σ²·y²

[0115] y1 and y2 follow normal distributions of the form N(μ1,σ1) and N(μ2,σ2), respectively.

[0116] In a 3D scene, create the missile's initial coordinates (X, Y, Z), where X = y1, Y = y2, and Z is greater than the highest point of the target model. Based on the initial coordinates and the firing direction, calculate the terminal trajectory and obtain the first intersection point between the missile's trajectory and the ship target. This intersection point is the missile's impact point coordinates.

[0117] Step 23: Calculate the damage status of key components;

[0118] Determine whether the missile or bullet impact point is within the kill zone. If it is, search the damage effect assessment knowledge base, retrieve the damage effects of key components associated with that kill zone, and quickly determine the damage status of the key components. If it is not within the kill zone, no action is taken.

[0119] Step 24: Calculate the functional damage status of the entire ship;

[0120] Load the ship's functional damage tree model, and based on the damage status of each key component and the logical relationship between events in the functional damage tree, calculate and judge layer by layer starting from the damage events of the key components, and finally give the judgment result of whether a certain damage level event has occurred, that is, the damage level of the ship.

[0121] Typical destructive tree logic relationships include AND gates, OR gates, and voting gates, and the specific calculation method is as follows:

[0122] (1) Logic AND gate calculation

[0123] The aircraft transport function of a typical nuclear-powered aircraft carrier is mainly supported by two aircraft elevators. The simultaneous destruction of both aircraft elevators can cause the loss of the aircraft transport function. In the damage tree, the logical relationship between the aircraft transport function and the two elevators is a logical AND gate.

[0124] The operation method of the logical AND gate:

[0125]

[0126] In the formula, P i The probability of damage in a single event;

[0127] δ i The weight of a single event; the sum of the weights of sibling events is 1.

[0128] P k The probability of damage is calculated for multiple events.

[0129] (2) Logic OR gate computation

[0130] The carrier-based aircraft landing function of a typical nuclear-powered aircraft carrier consists of a landing runway, a braking runway, a go-around runway, arresting gear and landing guidance equipment. Damage to any one component can result in the loss of the carrier-based aircraft landing function. In the damage tree, the logical relationship between the carrier-based aircraft landing function and the landing runway, braking runway, go-around runway, arresting gear, and landing guidance equipment is a logical "OR" gate.

[0131] Operation method of the logical "OR" gate:

[0132]

[0133] In the formula, P i is the damage probability of a single event;

[0134] δ i is the weight of a single event; the sum of the weights of events at the same level may not be 1.

[0135] P k is the damage probability obtained by operation of multiple events.

[0136] (3) Calculation of logical "voting" gate

[0137] The carrier-based aircraft takeoff function of a typical nuclear-powered aircraft carrier consists of 4 catapults. Damage to any 3 of the 4 catapults can cause severe damage to the carrier-based aircraft takeoff function (the catapult launch efficiency is reduced by 75%), so the damage events form a logical "voting" gate.

[0138] A "voting" gate means that the output event occurs only when the number of events among n input events that have occurred is greater than or equal to r. Among them, when r=1, it is an OR gate, and when r=n, it is an AND gate. When 1<r<n, it is equivalent to a combination of two levels of OR and AND logic. Taking r=2 and n=3 as an example, the conversion relationship is as Figure 9 shown.

[0139] Step 25: Evaluate the ship damage level and damage probability.

[0140] Repeat Step 22 to Step 24 to complete the specified number of simulation calculations, count the occurrence times of various damage levels, and divide by the number of simulations to obtain the occurrence probability. Output the damage level that meets the minimum requirement of event occurrence probability as the achievable damage level result. When multiple damage levels all meet the requirement, the damage level with the highest rank is selected. Output the occurrence probability corresponding to the damage event of this damage level as the damage probability result.

[0141] According to another embodiment of the present invention, a surface ship damage effect calculation device is also disclosed, comprising:

[0142] a memory, configured to store a component damage effect assessment knowledge base;

[0143] The calculation unit performs the following steps to achieve rapid calculation of damage effects:

[0144] The system obtains the number of anti-ship missiles, reads the ship's top-view profile and kill zone data, loads the anti-ship missile hit probability model and warhead dispersion model, and constructs a damage effect calculation scenario.

[0145] Simulate and generate the missile impact coordinates of an anti-ship missile top-attack;

[0146] Calculate the damage status of key components, including core facilities on the ship's deck and important compartments inside the ship;

[0147] Calculate the functional damage status of the entire ship;

[0148] Assess the damage level and probability of damage to the ship.

[0149] The computing unit may be a processor, such as a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or combinations of the above types of chips.

[0150] According to another embodiment of the present invention, a non-transitory computer-readable storage medium is also disclosed for storing computer instructions, which, when executed by a processor, implement the method for calculating the damage effect of surface ships according to any of the above-described schemes.

[0151] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein, and such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for calculating the damage effects on surface ships, characterized in that, include: Step S1, the steps for constructing a knowledge base for component damage assessment, include: Load the ship's finite element model and the warhead damage model to construct a finite element analysis scenario; By reading the ship's 3D model, functional damage tree, and damage criteria, typical working conditions for finite element analysis (FEM) are designed to assess the damage effects on critical components. The ship's functional damage tree is provided according to different damage levels, including three levels: ship system, functional subsystem, and critical components. Critical components include two categories: core deck facilities and important internal compartments. The damage criteria include structural damage criteria and functional damage criteria. The structural damage criteria are the kinetic energy and density thresholds of various lethal elements causing damage to critical components. The functional damage criteria are numerical descriptions of the functional loss of critical components caused by different degrees of lethality, including the number of fragments reaching the damage threshold per unit area and the ratio of shock wave coverage area reaching the damage threshold within critical compartments. Calculate and assess the destructive effects of the anti-ship missile warhead on key components; Construct a knowledge base for assessing the damage effects of key components; wherein, the knowledge base for assessing the damage effects includes a data table of ship kill sub-regions, a data table of ship key components, and a data table mapping the damage effects of kill sub-regions and key components; Step S2, the rapid calculation of damage effects, includes: The system obtains the number of anti-ship missiles, reads the ship's top-view profile and kill zone data, loads the anti-ship missile hit probability model and warhead dispersion model, and constructs a damage effect calculation scenario. The Monte Carlo method was used to simulate and generate the missile impact coordinates of an anti-ship missile's top-attack. Calculate the damage status of critical components; among which, determine whether the missile impact point or bullet impact point is located within the kill sub-region; if it is located within the kill sub-region, search the damage effect assessment knowledge base, read the damage effect of the critical components associated with the kill sub-region, and quickly determine the damage status of the critical components. Calculate the functional damage status of the entire ship; among which, load the ship's functional damage tree, and calculate layer by layer from the damage events of key components according to the damage status of each key component and the logical relationship between events in the functional damage tree, and finally give the judgment result of whether a damage event of a certain damage level has occurred, and record all possible damage levels. Assess the damage level and probability of a ship; specifically, count the number of occurrences of each damage level, divide by the number of simulations to obtain the probability of occurrence, take the damage level that meets the minimum probability requirement of the event as the achievable damage level, and take the probability of occurrence of the damage event corresponding to that damage level as the damage probability result.

2. The method for calculating the damage effect of surface ships according to claim 1, characterized in that, The following steps are used to design typical working conditions for finite element analysis for assessing the failure effects of critical components: Calculate the projection of the ship onto the top plane, generate the ship's top view profile, and establish a target coordinate system with the center point of the ship's top view profile in the length and width directions as the origin. Determine the effective kill profile of each core facility on the ship's deck and important compartments inside the ship; Overlay the effective kill contours of all key components and divide them according to the contour lines to generate multiple effective kill sub-regions. Record the list of key component numbers corresponding to each kill sub-region. For each kill zone, the center point of the zone is taken as the hit position of the anti-ship warhead, and finite element analysis conditions are established to generate a list of finite element analysis conditions.

3. The method for calculating the damage effect of surface ships according to claim 2, characterized in that, Calculate the projection of the core facility onto the top-down plane and generate the direct hit kill zone of the core facility; The maximum lateral distance at which an anti-ship warhead can still cause damage to the core facility when it explodes in the air or on the surface of the ship is calculated, thus generating the indirect kill zone of the core facility. The direct kill zone and the indirect kill zone of the core facility are geometrically combined to obtain the effective kill profile of the core facility.

4. The method for calculating the damage effect of surface ships according to claim 2, characterized in that, Calculate the projection of each important compartment onto the top-view plane to generate the direct hit kill zone of that important compartment; When an anti-ship warhead detonates in the surrounding compartments of a critical compartment, the indirect hit damage effect on that critical compartment is calculated. If indirect hit damage is achieved, the projection of the surrounding compartments on the top-view plane is calculated to generate a local indirect hit kill zone. After calculating the local indirect hit kill zones of all surrounding compartments, the indirect hit kill zone of the critical compartment is obtained by geometric union. The direct hit kill zone and indirect hit kill zone of the critical compartment are geometrically unioned to obtain the effective kill profile of the critical compartment.

5. The method for calculating the damage effect of surface ships according to claim 1, characterized in that, For each finite element analysis case, calculate the penetration and damage data of the anti-ship missile warhead to the ship's deck and frame structure; Based on the penetration and damage data, the damage effect on the core facilities of the ship's deck is assessed, and it is determined whether it is a direct hit on an important compartment. If so, the direct hit damage effect on the important compartment is assessed; if not, it is determined whether it constitutes indirect hit damage to the important compartment. The overall damage effect on the important compartment is then assessed.

6. A device for calculating the damage effects of surface ships, characterized in that, include: Memory, used to store a knowledge base for assessing the effects of component damage; The steps for building a knowledge base for component damage assessment include: Load the ship's finite element model and the warhead damage model to construct a finite element analysis scenario; By reading the ship's 3D model, functional damage tree, and damage criteria, typical working conditions for finite element analysis (FEM) are designed to assess the damage effects on critical components. The ship's functional damage tree is provided according to different damage levels, including three levels: ship system, functional subsystem, and critical components. Critical components include two categories: core deck facilities and important internal compartments. The damage criteria include structural damage criteria and functional damage criteria. The structural damage criteria are the kinetic energy and density thresholds of various lethal elements causing damage to critical components. The functional damage criteria are numerical descriptions of the functional loss of critical components caused by different degrees of lethality, including the number of fragments reaching the damage threshold per unit area and the ratio of shock wave coverage area reaching the damage threshold within critical compartments. Calculate and assess the destructive effects of the anti-ship missile warhead on key components; Construct a knowledge base for assessing the damage effects of key components; wherein, the knowledge base for assessing the damage effects includes a data table of ship kill sub-regions, a data table of ship key components, and a data table mapping the damage effects of kill sub-regions and key components; The calculation unit performs the following steps to achieve rapid calculation of damage effects: The system obtains the number of anti-ship missiles, reads the ship's top-view profile and kill zone data, loads the anti-ship missile hit probability model and warhead dispersion model, and constructs a damage effect calculation scenario. The Monte Carlo method was used to simulate and generate the missile impact coordinates of an anti-ship missile's top-attack. Calculate the damage status of critical components; among which, determine whether the missile impact point or bullet impact point is located within the kill sub-region; if it is located within the kill sub-region, search the damage effect assessment knowledge base, read the damage effect of the critical components associated with the kill sub-region, and quickly determine the damage status of the critical components. Calculate the functional damage status of the entire ship; among which, load the ship's functional damage tree, and calculate layer by layer from the damage events of key components according to the damage status of each key component and the logical relationship between events in the functional damage tree, and finally give the judgment result of whether a damage event of a certain damage level has occurred, and record all possible damage levels. Assess the damage level and probability of a ship; specifically, count the number of occurrences of each damage level, divide by the number of simulations to obtain the probability of occurrence, take the damage level that meets the minimum probability requirement of the event as the achievable damage level, and take the probability of occurrence of the damage event corresponding to that damage level as the damage probability result.

7. A computer-readable storage medium for storing computer instructions, which, when executed by a processor, implement the method for calculating the damage effects of surface ships according to any one of claims 1-5.

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