An Evaluation Method for the Explosion Protection Effectiveness of Anti-Ship Missiles

Abstract

The present invention discloses a method for evaluating the explosion protection effectiveness of anti-ship missiles, which includes: establishing a finite element model and coordinate system of a ship target, dividing each component of the ship target into different systems according to functionality, and assigning different weights; establishing an anti-ship missile model and determining the penetration order of all effective incoming anti-ship missiles; then calculating penetration parameters such as the impact point and incident angle of a single anti-ship missile hitting the ship according to conditions such as the anti-ship missile trajectory equation and interference equation; simplifying complex loads in the actual combat environment for finite element calculation, and evaluating the overall protection effectiveness of the ship based on a grid structure. This method can better evaluate the protection effectiveness of the ship's protection structure when the anti-ship missile explodes.

Description

Technical Field

[0001] The present invention relates to the technical field of evaluating the explosion protection effect of a ship protection structure against an anti - ship missile, and specifically to the calculation field of an explosion protection effect evaluation method based on finite - element calculation. Background Art

[0002] Anti - ship missiles are one of the most major threats faced by modern ships. Quantifying the protection effectiveness of a ship against the explosion of an anti - ship missile and scientifically evaluating the overall state of the ship after an attack play a crucial role in the command and decision - making of ships at sea. Adopting a structured approach to build a model is a classic method for evaluating the combat effectiveness of anti - ship missile weapons. However, when dealing with actual combat environment data using the classic method, problems such as fuzzy structural stratification, high computational complexity, and low operation efficiency will be faced.

[0003] At the same time, the existing anti - ship missile explosion calculation methods mainly focus on the evaluation of the damage effectiveness of ship targets, and there is less research on the self - protection effectiveness of ship structures. The evaluation of ship target damage effectiveness focuses more on characterizing its damage effectiveness in the form of the power performance and power parameter set of anti - ship missiles. However, only considering the damage power of anti - ship missiles themselves without linking to the protection effectiveness of ship targets cannot quantitatively characterize the attack results of anti - ship missiles. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the present invention provides an anti - ship missile explosion protection effectiveness evaluation method based on finite - element calculation, which comprehensively considers the damage effectiveness of anti - ship missiles and the self - protection ability of ship targets, can better evaluate the protection effectiveness of the ship protection structure during the explosion of anti - ship missiles, and effectively improve the accuracy of evaluation results.

[0005] The technical solution of the present invention is as follows:

[0006] An anti - ship missile explosion protection effectiveness evaluation method, characterized in that it includes:

[0007] S1 Classify all components of the ship according to different functions into systems, each system classification corresponds to a functional area, further divide the grid for each functional area, and the grid distribution within the same functional area is uniform; according to the importance of different functional areas for maintaining the ship's functions, assign corresponding damage weights to each functional area, number all components within each functional area according to the system category and the order of component spatial positions, and set their basic physical parameters and damage states according to the materials and functional requirements of each component to establish a ship finite - element model;

[0008] S2 Establish a damage power parameter model for different types of anti - ship missiles according to the damage power parameters of different anti - ship missiles;

[0009] S3 establishes the penetration parameter model of the anti-ship missile based on the penetration parameters of the anti-ship missile with different explosion times;

[0010] S4 obtains an explosion parameter model of the anti-ship missile by combining the lethality parameter model and the penetration parameter model;

[0011] S5 determines the attack order of the effectively targeted anti-ship missiles and numbers them according to the penetration order of the anti-ship missiles, thus obtaining a penetration sequence number;

[0012] S6 applies an incident load to the ship finite element model according to the penetration sequence based on the explosion parameter model, obtaining new physical parameters and damage states of each component after each explosion, until the incident load application is completed for all numbered components;

[0013] S7 is evaluated according to the following protection effectiveness evaluation model:

[0014]

[0015] Where n is the total number of classification systems, λ i is the damage weight of the ith system, E i represents the protection effectiveness of the i-th system, and E represents the overall protection effectiveness of the ship, with a value range of [0, 1). The closer the value of E is to 1, the better the anti-ship missile explosion protection effectiveness.

[0016] According to some specific embodiments of the present invention, the system classification includes: structural system, personnel system, communication system, weapon system and power system.

[0017] According to some specific embodiments of the present invention, the damage weight of the structural system is set to 0.5, the damage weight of the personnel system is set to 0.8, the damage weight of the communication system is set to 0.2, the damage weight of the weapon system is set to 0.8, and the damage weight of the power system is set to 0.8.

[0018] According to some specific embodiments of the present invention, the lethality parameter model is constructed as follows:

[0019] C k =C(m k ,N K ,v k ,Φ k ) (2)

[0020] Among them, Ck represents the power parameter of the kth type of anti-ship missile, m k ,N K ,v k ,Φ k They respectively represent the mass, quantity, initial velocity and dispersion angle of the anti-ship missile's fragments.

[0021] According to some specific embodiments of the present invention, the penetration parameter model is constructed as follows:

[0022] Q n =(x n ,y n ,z n ,θ n ),

[0023] Among them, Q n represents the penetration parameter of the nth explosion, (x n ,y n ,z n ) and θ n represent the impact point and incident angle of the nth explosion respectively.

[0024] According to some specific embodiments of the present invention, S7 includes:

[0025] S71 obtains the protection effectiveness E of a single component according to the following calculation model i j :

[0026]

[0027] Among them, i represents the system number of the component, j represents the spatial position number, and N i j Indicates the number of complete grids of each component, T i j Indicates the total number of grids of each component;

[0028] S72 obtains the protection effectiveness parameter R of a single component according to the following calculation model i j :

[0029]

[0030] Among them, P i j Indicates the minimum maintenance performance of a single component;

[0031] S73 obtains the protection efficiency E of each system according to the following calculation model i ,as follows:

[0032]

[0033] Among them, E i represents the protection effectiveness of the i-th system, n is the total number of components in the i-th system, δ i j is the weight of the jth component in system i;

[0034] The overall protection effectiveness E of the ship is determined according to the following evaluation model as follows:

[0035]

[0036] where n is the total number of systems, and λ i is the weight of the i-th system

[0037] The present invention innovatively proposes an evaluation method for the explosion protection effectiveness of anti-ship missiles. Based on finite element calculation, it is easy to implement, simplifies the complex loads under the combined action of multiple missiles in the actual combat environment, improves the operation efficiency and the accuracy of the evaluation results. This method simultaneously considers the protection ability of the ship structure and the explosion damage effectiveness of anti-ship missiles, and the calculation results are easy to be quantitatively characterized. At the same time, this method can arbitrarily change the parameters of the anti-ship missile structure and the ship structure, which will bring great convenience to engineers who need to calculate this type of explosion protection effectiveness. Description of the Drawings

[0038] Figure 1 is the program flow chart of a specific implementation manner of the method of the present invention.

[0039] Figure 2 is the schematic diagram of the damage weight ratio of the destroyer described in the specific implementation manner.

[0040] Figure 3 is the overall protection effectiveness calculation flow chart described in the specific implementation manner. Specific Embodiment

[0041] The present invention will be described in detail below in conjunction with the embodiments and the drawings. However, it should be understood that the embodiments and the drawings are only used for an exemplary description of the present invention, and do not constitute any limitation to the protection scope of the present invention. All reasonable transformations and combinations within the scope of the inventive concept of the present invention fall within the protection scope of the present invention.

[0042] According to the technical solution of the present invention, referring to Figure 1 , some specific implementation manners of the evaluation method for the explosion protection effectiveness of anti-ship missiles include the following steps:

[0043] The first step: Establish a finite element model of the ship such as a destroyer, classify all components of the ship according to functionality into systems, assign weight ratios to each category, number all components according to the system classification and the order of the component spatial positions, and assign corresponding basic physical properties and damage state properties to each component in the finite element model.

[0044] In some specific implementation manners, this step may further include:

[0045] (1) Divide the ship components into different functional zones, and further divide each functional zone into grids. The grid sizes between different functional zones can be different, and the grid distribution within the same functional zone is uniform.

[0046] Among them, further, the ship can be functionally divided into a structure system, a personnel system, a communication system, a weapon system, and a power system, which can be correspondingly divided into a structure system zone, a personnel system zone, a communication system zone, a weapon system zone, and a power system zone.

[0047] (2) Assign damage weights to each functional zone according to the importance of different functional zones for maintaining the ship's functions.

[0048] In a specific embodiment, different weights are assigned to the above five systems according to the actual situation, including: the structure system weight is 0.5, the personnel system weight is 0.8, the communication system weight is 0.2, the weapon system weight is 0.8, and the power system weight is 0.8, as Figure 2 shown.

[0049] (3) Number the ship components in the order of system classification and spatial position. The spatial position numbers of the components between different systems are independent of each other.

[0050] In a specific embodiment, the numbering rule is as follows: the communication system of the destroyer is numbered 3, and the signal receiver belongs to the communication system. Its spatial position number in the communication system is 12. Then the complete number of the signal receiver is (3,12), and the protection effectiveness of this component is expressed as E 3 12 ; the weapon system is numbered 4, and the anti-submarine rocket launcher belongs to the weapon system, and its spatial position number in the weapon system is also 12. Then the complete number of the anti-submarine rocket launcher is (4,12), and the protection effectiveness of this component is expressed as E 4 12 .

[0051] The above steps can assign physical attributes and damage state attributes to each component according to the actual situation and functional requirements, and evaluate the states of each component and system of the ship after the anti-ship missile explosion by quantifying the structural grid, so as to further evaluate the overall protection effectiveness of the ship.

[0052] The second step: Establish a payload model for different types of anti-ship missiles according to the killing power parameters of different anti-ship missiles.

[0053] In some specific embodiments, this step may further include:

[0054] (1) Construct a killing power parameter model for anti-ship missiles, as follows:

[0055] C k = C(mk , N K , v k , Φ k ) (2)

[0056] Among them, C represents the power parameter of the k-th type of anti-ship missile, m k , N K , v k , Φ k respectively represent the fragment mass, quantity, initial velocity and scattering angle of the anti-ship missile.

[0057] In a specific embodiment, if the target destroyer is attacked by two types of missiles, namely the Harpoon anti-ship missile and the Exocet anti-ship missile, then the power parameter model of the Harpoon anti-ship missile is set as follows: C1 = C(m1, N1, v1, Φ1...), and the power parameter model of the Exocet anti-ship missile is set as follows: C2 = C(m2, N2, v2, Φ2...).

[0058] (2) Determine the type of anti-ship missile of the target ship to be attacked, and calculate the power parameters related to its power parameter model, such as fragment mass, quantity, initial velocity and scattering angle.

[0059] (3) Establish anti-ship missile payload models of multiple types of attacking ships, and the payload model parameters are as shown in formula (2).

[0060] For example, in a specific embodiment, according to the power parameters and parameter models of the Harpoon anti-ship missile and the Exocet anti-ship missile obtained, the corresponding anti-ship missile payload models are set respectively.

[0061] The third step: Determine the attack order of all effective incoming anti-ship missiles, and number them in the order of penetration of the anti-ship missiles.

[0062] In some specific embodiments, this step may further include:

[0063] Calculate the moments when all effective anti-ship missiles hit the destroyer according to the absolute time of launch, ballistic parameters and environmental parameters of all anti-ship missiles, number them according to the order of hitting the destroyer, and mark the missile type corresponding to each sequential number. In a specific embodiment, for example: there are 3 effective anti-ship missile attacks. The anti-ship missiles that cause effective attacks on the ship for the first and third times are Harpoon anti-ship missiles, and the second one is Exocet anti-ship missile. Then the numbering order is as shown in Table 1 below:

[0064] Table 1 Anti-ship missile attack numbering

[0065] Attack Number Missile Type 1 Harpoon 2 Exocet 3 Harpoon

[0066] Step 4: According to the serial numbers, calculate the penetration parameters such as the impact point and incident angle of a single anti-ship missile and a ship based on the anti-ship missile trajectory equation, interference equation, and ship finite element model. Construct an anti-ship missile explosion parameter model based on the penetration parameter model and the power parameter model.

[0067] In some specific embodiments, this step may further include:

[0068] (1) Construct a penetration parameter model of the anti-ship missile as follows:

[0069] Q n =(x n ,y n ,z n ,θ n )0]

[0070] where Q n represents the penetration parameter of the nth explosion, (x n ,y n ,z n ) and θ n represent the impact point and incident angle of the nth explosion, respectively.

[0071] This step can solve the problem that the power parameters of a single anti-ship missile shown in Equation (2) cannot reflect the explosion protection result and conduct quantitative characterization, and incorporate penetration parameters related to the target, such as the impact point and incident angle, into the evaluation method.

[0072] (2) Based on the penetration parameter model and the power parameter model, construct an explosion parameter model of a single anti-ship missile as follows:

[0073]

[0074] Step 5: Apply the load to the finite element model according to the explosion parameter model obtained in Step 4 and conduct finite element calculation. Retain the calculation result as the new ship model.

[0075] In this step, the parameters obtained from Equation (3) can represent all the parameters required for a single anti-ship missile explosion. Apply the explosion parameters obtained in Step 4 to the destroyer finite element model and conduct the calculation to obtain the calculation result after a single explosion. It can simplify the complex attack of an anti-ship missile on a ship in the actual combat environment into the superposition of multiple single anti-ship missile attacks, and retain the calculation result after a single anti-ship missile explosion as the new destroyer model.

[0076] Step 6: Repeat Steps 4 and 5 until all the missile loads with the numbers determined in Step 3 are applied.

[0077] Iterate the fourth and fifth steps, repeat the calculation of the parameters representing the explosion of a single anti-ship missile in Equation (3) and set the finite element parameters, and retain the calculation results for the new ship model. The number of iterations, the order, and the input power parameters are determined by Step 3.

[0078] Step 7: Evaluate the overall protection effectiveness of the anti-ship missile explosion, which specifically includes:

[0079] (1) Determine the complete number of grids N of each component i j , the total number of grids T of each component i j , where i represents the system number to which the component belongs, j represents the spatial position number, and use the complete number of grids N of a single component i j and the total number of grids T of a single component i j to characterize the protection ability E of a single component i j :

[0080]

[0081] (2) Determine the protection ability E of each component i j , and compare it with the minimum maintenance effectiveness P of this component i j . If E i j is greater than P i j , then it is considered that this component is protected, and the protection result R of a single component i j is recorded as 1. Conversely, if E i j is less than P i j then it is considered that this component has been damaged, and the protection result R of a single component i j is recorded as 1. That is:

[0082]

[0083] Among them, the definition of the minimum maintenance effectiveness P i j is: after the component is meshed, the ratio of the minimum number of undamaged grids required to maintain normal function to the total number of grids of this component.

[0084] (3) Determine the protection effectiveness E of each system i , as follows:

[0085]

[0086] Among them, E i represents the protection effectiveness of the i-th system, and n is the total number of components in the i-th system. Among them, δ i j is the weight of the j-th component in system i, which can be assigned according to the importance of each component in the system, and

[0087] (2) Determine the overall protection effectiveness E of the ship as follows:

[0088]

[0089] Among them, q is the total number of systems, and λ i is the weight of the i-th system. The value range of E is [0, 1). The closer the value of E is to 1, the better the anti-ship missile explosion protection effectiveness represents.

[0090] The above embodiments are only the preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for those of ordinary skill in the art, improvements and refinements made without departing from the principle of the present invention should also be regarded as within the protection scope of the present invention.

Claims

1. An evaluation method for the explosion protection effectiveness of an anti-ship missile, characterized in that It includes: S1 systematically classifies all components of the ship according to their functionalities. Each system classification corresponds to a functional zone, and each functional zone is further divided into grids. The grids within the same functional zone are evenly distributed. According to the importance of different functional areas to maintaining the function of the ship, the corresponding damage weight is assigned to each functional area, and all components in each functional area are numbered according to the system category and the spatial position order of the components. The basic physical parameters and damage status of each component are set according to the material and functional requirements, and the finite element model of the ship is established; S2 establishes the lethality parameter model of different types of anti-ship missiles based on their lethality parameters; S3 establishes the penetration parameter model of the anti-ship missile based on the penetration parameters of the anti-ship missile with different explosion times; S4 obtains an explosion parameter model of the anti-ship missile by combining the lethality parameter model and the penetration parameter model; S5 determines the attack order of the effectively targeted anti-ship missiles and numbers them according to the penetration order of the anti-ship missiles, thus obtaining a penetration sequence number; S6 applies an incident load to the ship finite element model according to the penetration sequence based on the explosion parameter model, obtaining new physical parameters and damage states of each component after each explosion, until the incident load application is completed for all numbered components; S7 is evaluated according to the following protection effectiveness evaluation model: where q is the total number of the classification systems, and λ i is the damage weight of the i-th system, and E i represents the protection efficiency of the i-th system, and E represents the overall protection efficiency of the ship, and its value range is [0, 1). The closer the value of E is to 1, the better the anti-ship missile explosion protection efficiency is.

2. The anti-ship missile explosion protection effectiveness evaluation method according to claim 1, characterized in that The system classification includes: structural system, personnel system, communication system, weapon system and power system.

3. The anti-ship missile explosion protection effectiveness evaluation method according to claim 2, wherein The damage weight of the structural system is set to 0.5, the damage weight of the personnel system is set to 0.8, the damage weight of the communication system is set to 0.2, the damage weight of the weapon system is set to 0.8, and the damage weight of the power system is set to 0.

8.

4. The anti-ship missile explosion protection effectiveness evaluation method according to claim 1, characterized in that The lethality parameter model is constructed as follows: C k = C(m k , N K , v k , Φ k ) (2) Among them, C k represents the power parameter of the k-th anti-ship missile, m k , N K , v k , Φ k respectively represent the fragment mass, quantity, initial velocity and scattering angle of the anti-ship missile.

5. The anti-ship missile explosion protection effectiveness evaluation method according to claim 1, wherein The penetration parameter model is constructed as follows: Q n = (x n , y n , z n , θ n ), Among them, Q n represents the penetration parameter of the nth explosion, (x n , y n , z n ) and θ n respectively represent the impact point and the incident angle of the nth explosion.

6. The anti-ship missile explosion protection effectiveness evaluation method according to claim 1, characterized in that The S7 includes: S71 Obtain the single-component protection effectiveness E according to the following calculation model i j : Among them, i represents the system number to which the component belongs, j represents the spatial position number, and N i j represents the complete grid quantity of each component, and T i j represents the total grid number of each component; S72 obtains the protection effectiveness parameter R of a single component according to the following calculation model i j : Among them, P i j represents the minimum maintenance efficiency of a single component; The protection effectiveness E of each system is obtained according to the following calculation model i , as follows: Among them, E i represents the protection effectiveness of the i-th system, n is the total number of components in the i-th system, and δ i j is the weight of the j-th component in system i; S74 determines the overall ship protection effectiveness E according to the following evaluation model: where q is the total number of the systems, and λ i is the weight of the i-th system.

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