Method and system for calculating water-hitting probability of sea-skimming aircraft under environmental influence

Abstract

The present invention discloses a method and system for calculating the probability of water striking during sea skimming flight of an aircraft under environmental influence. The method comprises determining the flight parameters of the aircraft's sea skimming flight and a predetermined target Y; querying a marine environment reanalysis database to obtain marine environment element data at the current position of the aircraft; calculating the actual flight altitude of the aircraft at the current moment and the probability of water striking during sea skimming flight at the current position of the aircraft according to the marine environment element data at the current position and the flight parameters of the aircraft's sea skimming flight; if the aircraft reaches the predetermined target Y, the probability of water striking during sea skimming flight in the entire sea skimming flight process is calculated by integrating the sea skimming flight probabilities at various positions. The present invention comprehensively considers the marine environment elements on the aircraft's flight path and the aerodynamic performance of ultra-low altitude aircraft, establishes a high-resolution marine environment database and an ultra-low altitude aircraft flight database, and realizes the refined calculation of the probability of water striking of ultra-low altitude aircraft.

Description

Technical Field

[0001] The present invention relates to sea-skimming flight technology in the field of aircraft, and in particular to a method and system for calculating the probability of an aircraft hitting the water due to environmental influences during sea-skimming flight. Background Art

[0002] The calculation of the probability of hitting water during sea-skimming flight of ultra-low-altitude aircraft refers to the calculation and analysis of the probability of collision with the sea surface due to the influence of the hydrological and meteorological conditions of the sea surface when the ultra-low-altitude aircraft adopts sea-skimming flight tactics. The existing methods for calculating the probability of hitting water mainly have the following disadvantages: 1. Low calculation accuracy: The existing methods for calculating the probability of hitting water mainly use empirical values ​​or large-scale sea wave forecast values ​​to statistically calculate the probability of hitting water, and cannot accurately calculate it according to the ocean environment on the flight path. 2. Lack of pertinence: The existing methods for calculating the probability of hitting water mainly consider the sea wave information and the flight parameters of the aircraft, and consider less the performance parameters of the missile body itself, and cannot perform targeted calculations of the probability of hitting water for different missile bodies. Aerodynamic performance and control systems. 3. Incomplete consideration of variables: The existing methods for calculating the probability of hitting water usually assume that the ultra-low-altitude aircraft flies stably according to the preset flight parameters. In fact, the uncertain ocean environment will cause the actual flight parameters of the ultra-low-altitude aircraft to deviate from the preset values, which will have a greater impact on the probability of hitting water. Summary of the invention

[0003] Technical problem to be solved by the present invention: In view of the above-mentioned problems in the prior art, a method and system for calculating the probability of water striking of an ultra-low altitude aircraft during sea skimming flight is provided. The present invention aims to realize a refined, generalized and multi-factor-based calculation of the probability of water striking of an ultra-low altitude aircraft during sea skimming flight, and to improve the accuracy of the calculation of the probability of water striking.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0005] A method for calculating the probability of water striking of an aircraft during sea skimming flight under environmental influences comprises the following steps:

[0006] S1, determining the flight parameters of the aircraft's sea-skimming flight and the predetermined target Y;

[0007] S2, querying the ocean environment reanalysis database to obtain ocean environment element data of the current position of the aircraft, the ocean environment element data includes wind speed , effective wave height and wave direction ;

[0008] S3, querying the aerodynamic database of the aircraft for sea-skimming flight to obtain the lift coefficient of the aircraft under the current flight parameters according to the ocean environment element data of the current position and the flight parameters of the aircraft for sea-skimming flight; calculating the actual flight altitude of the aircraft at the current moment according to the ocean environment element data of the current position and the lift coefficient of the aircraft under the current flight parameters;

[0009] S4, calculating the sea skimming water striking probability of the aircraft at its current position according to the actual flight altitude of the aircraft at the current moment;

[0010] S5, judging whether the aircraft has reached the predetermined target Y, if the aircraft has reached the predetermined target Y, jumping to step S6, otherwise jumping to step S2;

[0011] S6, calculating the sea skimming flying water striking probability in the entire sea skimming flying process by comprehensively analyzing the sea skimming flying water striking probabilities at various positions.

[0012] Optionally, before step S2, the process further includes constructing a marine environment reanalysis database:

[0013] S2.1, determine the flight latitude and longitude range and time range of the aircraft;

[0014] S2.2, obtaining the marine environment element data within the flight latitude and longitude range and time range of the aircraft from the designated marine environment data source;

[0015] S2.3, classify and organize the marine environmental element data within the flight latitude and longitude range and time range of the aircraft according to the specified spatial and temporal resolution, and construct a marine environmental reanalysis database.

[0016] Optionally, the function expression for calculating the actual flight altitude of the aircraft at the current moment in step S3 is:

[0017] ,

[0018] In the above formula, is the actual flight altitude of the aircraft at the current moment, is the expected cruising altitude in the flight parameters, is the lift coefficient of the aircraft under the current flight parameters, is the air density, is the wind speed in the ocean environment element data at the current location, is the expected cruising speed in the flight parameters, is the projected area of ​​the aircraft, is the aircraft gravity.

[0019] Optionally, before step S3, the method also includes constructing an aerodynamic database for sea-skimming aircraft: numerically simulating the lift coefficient of the aircraft under different flight parameters of sea-skimming aircraft and ocean environmental element data through computational fluid dynamics simulation method, and constructing an aerodynamic database for sea-skimming aircraft based on the flight parameters of different sea-skimming aircraft and the lift coefficient under ocean environmental element data obtained by numerical simulation.

[0020] Optionally, the method of numerically simulating the lift coefficient of the aircraft under different flight parameters of the aircraft's sea-skimming flight and ocean environmental element data by means of computational fluid dynamics simulation includes: 1) establishing a three-dimensional geometric model of the aircraft and exporting a three-dimensional grid file; 2) importing the three-dimensional grid file into computational fluid dynamics simulation software; 3) setting the flight parameters of the aircraft's sea-skimming flight and ocean environmental element data in the computational fluid dynamics simulation software, including the aircraft's expected cruising altitude, expected cruising speed, Mach number and angle of attack, and wind speed , effective wave height and wave direction ; 4) Run computational fluid dynamics simulation software to perform numerical simulation to calculate the flight parameters of different aircraft sea skimming flights and the calculation results under the ocean environment element data until the calculation results converge, the calculation results include the aircraft's pressure, lift coefficient, side force coefficient, drag coefficient, pitch moment, roll moment and yaw moment; 5) According to the given aircraft sea skimming flight flight parameters and ocean environment element data, as well as the lift coefficient in the calculation results, an aircraft sea skimming flight aerodynamic database is constructed.

[0021] Optionally, the function expression for calculating the sea skimming flying water striking probability of the current position of the aircraft in step S4 is:

[0022] ,

[0023] In the above formula, is the water-hitting probability of the aircraft at its current position. is the effective wave height in the ocean environment element data at the current location, is the expected cruising altitude in the flight parameters, is the actual flight altitude of the aircraft at the current moment, The flight direction of the aircraft and the wave direction in the ocean environment element data at the current location The angle between.

[0024] Optionally, the function expression for calculating the sea skimming flying water striking probability during the entire sea skimming flying process in step S6 is:

[0025] ,

[0026] In the above formula, is the probability of hitting water during the entire sea-skimming flight, To calculate the number of positions for the probability of hitting the water during sea skimming flight, is the water-hitting probability of sea-skimming flight at the ith position.

[0027] In addition, the present invention also provides a system for calculating the probability of an environmental impact aircraft hitting the water during sea skimming flight, comprising a microprocessor and a memory connected to each other, wherein the microprocessor is programmed or configured to execute the method for calculating the probability of an environmental impact aircraft hitting the water during sea skimming flight.

[0028] In addition, the present invention also provides a computer-readable storage medium, which stores a computer program or instruction, and the computer program or instruction is programmed or configured to execute the method for calculating the probability of water hitting of the sea-skimming aircraft during the environmental impact through a processor.

[0029] In addition, the present invention also provides a computer program product, including a computer program or instructions, which are programmed or configured to execute the method for calculating the probability of water striking of a sea-skimming aircraft by a processor.

[0030] Compared with the prior art, the present invention mainly has the following advantages:

[0031] 1) High-precision calculation: By introducing ocean environment reanalysis data, the actual environment encountered by the missile during flight can be simulated more accurately. This refined solution method makes the calculation of water impact probability more accurate and provides more reliable data support for missile design and use;

[0032] 2) Wide adaptability: The aerodynamic performance of the aircraft is included in the calculation range, so that different types of missiles can perform targeted water-hitting probability assessment. This greatly improves the applicability of the invention on different types of missiles and meets diverse needs;

[0033] 3) Strong flexibility: The segmented calculation concept can be used to flexibly divide and calculate according to the actual flight path of the missile. This method not only improves the flexibility of calculation, but also enables the water-hitting probability in each flight path to be independently and accurately evaluated;

[0034] 4) Effective decision support: By comprehensively evaluating the probability of water impact during the entire flight process, it provides strong decision support for missile launch, path planning and emergency response. This helps reduce the risk of missile failure or failure due to water impact during flight, and improves the safety and reliability of the missile;

[0035] 5) Good scalability: With the continuous updating and improvement of marine environment data and missile aerodynamic performance data, the invention can be easily expanded and upgraded to adapt to new needs and challenges.

[0036] In summary, the present invention comprehensively considers the marine environmental factors on the missile flight path and the aerodynamic performance of the ultra-low altitude aircraft, and based on the established high-resolution marine environment database and ultra-low altitude aircraft flight database, can realize the refined and generalized calculation of the water-hitting probability of the ultra-low altitude aircraft taking into account multiple factors, thereby improving the accuracy of the water-hitting probability calculation. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 Schematic diagram of the basic flow of the method of the embodiment of the present invention.

[0038] Figure 2 This is a pressure cloud diagram of an aircraft during flight obtained in an embodiment of the present invention.

[0039] Figure 3 is the ocean significant wave height under the specified sea area obtained in the embodiment of the present invention.

[0040] Figure 4 Calculation results of the water striking probability of sea skimming flight under different significant wave heights in an embodiment of the present invention. DETAILED DESCRIPTION

[0041] The following describes the implementation of the present invention through specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0042] like Figure 1 As shown, the method for calculating the probability of water striking during sea skimming flight of an environmentally-affected aircraft in this embodiment includes the following steps:

[0043] S1, determining the flight parameters of the aircraft's sea-skimming flight and the predetermined target Y;

[0044] S2, query the ocean environment reanalysis database to obtain the ocean environment element data of the current position of the aircraft, the ocean environment element data includes wind speed , effective wave height and wave direction ;

[0045] S3, querying the aerodynamic database of the aircraft for sea-skimming flight to obtain the lift coefficient of the aircraft under the current flight parameters according to the ocean environment element data of the current position and the flight parameters of the aircraft for sea-skimming flight; calculating the actual flight altitude of the aircraft at the current moment according to the ocean environment element data of the current position and the lift coefficient of the aircraft under the current flight parameters;

[0046] S4, calculating the sea skimming water striking probability of the aircraft at its current position according to the actual flight altitude of the aircraft at the current moment;

[0047] S5, judging whether the aircraft has reached the predetermined target Y, if the aircraft has reached the predetermined target Y, jumping to step S6, otherwise jumping to step S2;

[0048] S6, calculating the sea skimming flying water striking probability in the entire sea skimming flying process by comprehensively analyzing the sea skimming flying water striking probabilities at various positions.

[0049] In step S1 of this embodiment, the flight parameters of the sea skimming flight of the aircraft are determined, including the expected cruising altitude in the flight parameters. and the desired cruising speed etc. for subsequent flight state calculations, and other parameters may also be determined as needed. The aircraft in this embodiment is an unmanned aircraft, specifically a drone or a missile or other aircraft.

[0050] In step S2 of this embodiment, when querying the marine environment reanalysis database to obtain the marine environment element data of the current position of the aircraft, the marine environment reanalysis database is queried according to the current coordinates of the aircraft to obtain the position of the aircraft at the current position. t The marine environment element data at the moment. In this embodiment, before step S2, it also includes constructing a marine environment reanalysis database:

[0051] S2.1, determine the flight latitude and longitude range and time range of the aircraft;

[0052] S2.2, obtaining the marine environment element data within the flight latitude and longitude range and time range of the aircraft from the designated marine environment data source;

[0053] S2.3, classify and organize the marine environment element data within the flight latitude and longitude range and time range of the aircraft according to the specified resolution of space and time, and construct a marine environment reanalysis database. In this embodiment, these data are classified and organized according to different resolutions of space and time, including organizing data with three resolutions of 0.1°×0.1°×1h, 0.05°×0.05°×6h or 0.01°×0.01°×24h and constructing a marine environment reanalysis database.

[0054] In step S3 of this embodiment, the ocean environment reanalysis database is queried to obtain the ocean environment element data of the current position of the aircraft, including wind speed , effective wave height and wave direction wait.

[0055] The function expression for calculating the actual flight altitude of the aircraft at the current moment in step S3 of this embodiment is:

[0056] ,

[0057] In the above formula, is the actual flight altitude of the aircraft at the current moment, is the expected cruising altitude in the flight parameters, is the lift coefficient of the aircraft under the current flight parameters, is the air density, is the wind speed in the ocean environment element data at the current location, is the expected cruising speed in the flight parameters, is the projected area of ​​the aircraft, is the aircraft gravity.

[0058] In this embodiment, before step S3, it also includes constructing an aircraft sea skimming flight aerodynamic database: numerically simulating the lift coefficient of the aircraft under different flight parameters of the aircraft sea skimming flight and ocean environmental factor data by means of computational fluid dynamics (CFD) simulation, and constructing an aircraft sea skimming flight aerodynamic database based on the flight parameters of the aircraft sea skimming flight and the lift coefficient under the ocean environmental factor data obtained by numerical simulation. By using the CFD method, numerically simulating the aerodynamic performance of the aircraft under different flight parameters, the lift coefficient of the aircraft under different wind speeds is obtained. , wave height The lift coefficient CL under the action of the air flow is used to construct an aerodynamic database of ultra-low-altitude aircraft for subsequent flight state calculations.

[0059] In this embodiment, the method of numerically simulating the lift coefficient of the aircraft under different flight parameters of the aircraft's sea-skimming flight and ocean environmental element data through computational fluid dynamics simulation includes: 1) establishing a three-dimensional geometric model of the aircraft (in CAD software) and exporting a three-dimensional mesh file; 2) importing the three-dimensional mesh file into computational fluid dynamics simulation software (such as Fluent, CFX or Starccm+, etc.), and after importing the three-dimensional mesh file of the ultra-low-altitude aircraft, the mesh can be checked and optimized to ensure that the quality and quantity of the mesh meet the requirements of calculation accuracy; 3) setting the flight parameters of the aircraft's sea-skimming flight and ocean environmental element data in the computational fluid dynamics simulation software, including the aircraft's expected cruising altitude, expected cruising speed, Mach number and angle of attack, and wind speed , effective wave height and wave direction ; 4) Run computational fluid dynamics simulation software to perform numerical simulation to calculate the flight parameters of different aircraft flying over the sea and the calculation results under the marine environment factor data until the calculation results converge, the calculation results include the pressure, lift coefficient, side force coefficient, drag coefficient, pitch moment, roll moment and yaw moment of the aircraft, Figure 2 is the pressure cloud map of the aircraft during flight obtained in this embodiment; 5) construct an aircraft sea-skimming flight aerodynamic database according to the given flight parameters of the aircraft sea-skimming flight and the marine environmental element data, as well as the lift coefficient in the calculation result. As an optional implementation, the aircraft sea-skimming flight aerodynamic database in this embodiment is a database constructed using SQLlite. Undoubtedly, the key to this embodiment lies in the data information recorded in the aircraft sea-skimming flight aerodynamic database, and the step does not depend on the specific form or format of SQLlite or other databases. When querying the aircraft sea-skimming flight aerodynamic database to obtain the lift coefficient under the current flight parameters of the aircraft according to the marine environmental element data at the current location and the flight parameters of the aircraft sea-skimming flight, if there is a lift coefficient under the current flight parameters of the aircraft at the corresponding resolution, the lift coefficient under the current flight parameters of the aircraft at the corresponding resolution is directly read. If there is no lift coefficient under the current flight parameters of the aircraft at the corresponding resolution, it is necessary to perform an interpolation operation on the lift coefficient under the current flight parameters of the aircraft at the relevant resolution to obtain the lift coefficient under the current flight parameters of the aircraft at the corresponding resolution.

[0060] The function expression for calculating the sea skimming water striking probability of the aircraft at the current position in step S4 of this embodiment is:

[0061] ,

[0062] In the above formula, is the water-hitting probability of the aircraft at its current position. is the effective wave height in the ocean environment element data at the current location, is the expected cruising altitude in the flight parameters, is the actual flight altitude of the aircraft at the current moment, The flight direction of the aircraft and the wave direction in the ocean environment element data at the current location In this embodiment, the effective wave height in the ocean environment element data at the current location like Figure 3 As shown, different effective wave heights The probability of hitting water in sea skimming flight at the current position of the aircraft The calculation result of (abbreviated as hitting water probability) is as follows Figure 4 See Figure 4 It can be seen that with the effective wave height The increase of the probability of hitting water in sea-skimming flight at the current position of the aircraft Also gradually increases, and at the same time as the expected cruising altitude in the flight parameters The increase of the probability of hitting water in sea skimming flight at the current position of the aircraft Also becomes smaller.

[0063] In step S6 of this embodiment, the function expression for calculating the sea skimming flying water striking probability during the entire sea skimming flying process is:

[0064] ,

[0065] In the above formula, is the probability of hitting water during the entire sea-skimming flight, To calculate the number of positions for the probability of hitting the water during sea skimming flight, As an optional implementation, in this embodiment, the sea skimming probability is calculated once every 10 kilometers, and each calculated distance is regarded as a grid. The second 10-kilometer sea skimming probability during the flight is p1, the second 10-kilometer sea skimming probability is p2, and the i-th 10-kilometer sea skimming probability is p i , and so on, the probability of hitting water during the nth 10 km sea skimming flight is p n The sea skimming probability of the entire sea skimming flight process can be obtained by multiplying the sea skimming probability of the n positions and subtracting it from 1. .

[0066] To summarize, the method for calculating the probability of water striking of an aircraft during sea skimming flight under the influence of the environment in this embodiment aims at addressing the shortcomings of the above-mentioned prior arts and proposes a refined, generalized, and multi-factor-considered method for calculating the probability of water striking of an aircraft during sea skimming flight. The method constructs a flight database for the aerodynamic flight performance of the aircraft through the CFD method, and then, in combination with the high-resolution reanalysis data of the marine environment, calculates the initial conditions for the sea skimming flight of the aircraft, and obtains the wind and wave data traversed by the aircraft during the sea skimming flight. The data is combined with the changes in the actual flight altitude of the aircraft under the influence of sea breeze in different wind zones, and then the water striking probability of the aircraft in the entire process is calculated, thereby effectively improving the accuracy of the calculation of the water striking probability.

[0067] In addition, this embodiment also provides a system for calculating the probability of an environmental impact aircraft hitting the water during sea skimming flight, including a microprocessor and a memory connected to each other, wherein the microprocessor is programmed or configured to execute the method for calculating the probability of an environmental impact aircraft hitting the water during sea skimming flight.

[0068] In addition, this embodiment also provides a computer-readable storage medium, which stores a computer program or instruction, and the computer program or instruction is programmed or configured to execute the method for calculating the probability of water hitting of the sea-skimming aircraft during the environmental impact through a processor.

[0069] In addition, this embodiment also provides a computer program product, including a computer program or instructions, which are programmed or configured to execute the method for calculating the probability of water hitting of an environmentally-affected aircraft in sea-skimming flight through a processor.

[0070] Those skilled in the art should understand that the technical solutions provided by the embodiments of the present application may be in the form of methods, systems, or computer program products. Therefore, the present application may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present application may take the form of a computer program product implemented on one or more computer-readable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes. The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the process Figure 1 A process or multiple processes and / or boxes Figure 1 These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing device to work in a specific way, so that the instructions stored in the computer-readable memory produce a product including an instruction device, which implements the functions specified in the process. Figure 1 A process or multiple processes and / or boxes Figure 1 These computer program instructions can also be loaded onto a computer or other programmable data processing device, so that a series of operation steps are executed on the computer or other programmable device to produce a computer-implemented process, so that the instructions executed on the computer or other programmable device provide for implementing the process in the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0071] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A method for calculating the probability of water striking of an aircraft during sea skimming flight under environmental influence, characterized in that: The steps include: S1, determining the flight parameters of the aircraft's sea-skimming flight and the predetermined target Y; S2, querying the ocean environment reanalysis database to obtain ocean environment element data of the current position of the aircraft, the ocean environment element data includes wind speed , effective wave height and wave direction ; S3, querying the aerodynamic database of the aircraft for sea-skimming flight to obtain the lift coefficient of the aircraft under the current flight parameters according to the ocean environment element data of the current position and the flight parameters of the aircraft for sea-skimming flight; calculating the actual flight altitude of the aircraft at the current moment according to the ocean environment element data of the current position and the lift coefficient of the aircraft under the current flight parameters; S4, calculating the sea skimming water striking probability of the aircraft at its current position according to the actual flight altitude of the aircraft at the current moment; S5, judging whether the aircraft has reached the predetermined target Y, if the aircraft has reached the predetermined target Y, jumping to step S6, otherwise jumping to step S2; S6, calculating the sea skimming flying water striking probability in the whole sea skimming flying process by combining the sea skimming flying water striking probabilities at each position; The function expression for calculating the actual flight altitude of the aircraft at the current moment in step S3 is: ， In the above formula, is the actual flight altitude of the aircraft at the current moment, is the expected cruising altitude in the flight parameters, is the lift coefficient of the aircraft under the current flight parameters, is the air density, is the wind speed in the ocean environment element data at the current location, is the expected cruising speed in the flight parameters, is the projected area of ​​the aircraft, is the aircraft gravity; The function expression for calculating the sea skimming flying water striking probability of the current position of the aircraft in step S4 is: ， In the above formula, is the water-hitting probability of the aircraft at its current position. is the effective wave height in the ocean environment element data at the current location, is the expected cruising altitude in the flight parameters, is the actual flight altitude of the aircraft at the current moment, The flight direction of the aircraft and the wave direction in the ocean environment element data at the current location The angle between The function expression for calculating the sea skimming flying water striking probability during the entire sea skimming flying process in step S6 is: ， In the above formula, is the probability of hitting water during the entire sea-skimming flight, To calculate the number of positions for the probability of hitting the water during sea skimming flight, is the water-hitting probability of sea-skimming flight at the ith position.

2. The method for calculating the probability of water striking during sea skimming flight of an environmental impact aircraft according to claim 1, characterized in that: Before step S2, it also includes building a marine environment reanalysis database: S2.1, determine the flight latitude and longitude range and time range of the aircraft; S2.2, obtaining the marine environment element data within the flight latitude and longitude range and time range of the aircraft from the designated marine environment data source; S2.3, classify and organize the marine environmental element data within the flight latitude and longitude range and time range of the aircraft according to the specified spatial and temporal resolution, and construct a marine environmental reanalysis database.

3. The method for calculating the probability of water striking of an environmental impact aircraft during sea skimming flight according to claim 1, characterized in that: Before step S3, it also includes constructing an aerodynamic database for sea-skimming aircraft: numerically simulating the lift coefficient of the aircraft under different flight parameters of sea-skimming aircraft and ocean environmental element data through computational fluid dynamics simulation method, and constructing an aerodynamic database for sea-skimming aircraft based on the flight parameters of different sea-skimming aircraft and the lift coefficient under ocean environmental element data obtained by numerical simulation.

4. The method for calculating the probability of water striking during sea skimming flight of an environmental impact aircraft according to claim 3, characterized in that: The method of numerically simulating the lift coefficient of an aircraft under different flight parameters of the aircraft's sea-skimming flight and ocean environmental element data by using computational fluid dynamics simulation includes: 1) establishing a three-dimensional geometric model of the aircraft and exporting a three-dimensional grid file; 2) importing the three-dimensional grid file into computational fluid dynamics simulation software; 3) setting the flight parameters of the aircraft's sea-skimming flight and ocean environmental element data in the computational fluid dynamics simulation software, including the aircraft's expected cruising altitude, expected cruising speed, Mach number and angle of attack, and wind speed , effective wave height and wave direction ; 4) Run computational fluid dynamics simulation software to perform numerical simulation to calculate the flight parameters of different aircraft sea skimming flights and the calculation results under the ocean environment element data until the calculation results converge, the calculation results include the aircraft's pressure, lift coefficient, side force coefficient, drag coefficient, pitch moment, roll moment and yaw moment; 5) According to the given aircraft sea skimming flight flight parameters and ocean environment element data, as well as the lift coefficient in the calculation results, an aircraft sea skimming flight aerodynamic database is constructed.

5. A system for calculating the probability of water striking of an aircraft during sea skimming flight under environmental influence, comprising a microprocessor and a memory connected to each other, characterized in that: The microprocessor is programmed or configured to execute the method for calculating the probability of water striking of an environment-affecting aircraft in sea-skimming flight as recited in any one of claims 1 to 4.

6. A computer-readable storage medium having a computer program or instruction stored therein, characterized in that: The computer program or instruction is programmed or configured to execute the method for calculating the water striking probability of an environment-affecting aircraft in sea-skimming flight as claimed in any one of claims 1 to 4 through a processor.

7. A computer program product comprising a computer program or instructions, characterized in that The computer program or instruction is programmed or configured to execute the method for calculating the probability of water striking of an environment-affecting aircraft in sea-skimming flight as claimed in any one of claims 1 to 4 through a processor.

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