Safety analysis method and device for ships connected with elevated cables in waves and electronic equipment

Abstract

The invention relates to the field of ship navigation, in particular to a safety analysis method and device for ships connected with elevated cables in waves, electronic equipment and a computer readable storage medium. The method comprises the steps that a ship coupling motion equation set is constructed, and the ship coupling motion equation set comprises force and torque, acting on a first ship and a second ship, of an elevated cable; solving a ship coupling motion equation set based on the set wave data, and obtaining first ship coupling motion data, second ship coupling motion data and elevated cable mechanical data under the set wave data; and determining the safety of the first ship and the second ship based on the first ship coupling motion data, the second ship coupling motion data and the elevated cable mechanical data. According to the safety analysis method and device for the ship connected with the elevated cable in the wave, the electronic equipment and the computer readable storage medium, the technical effect of improving the navigation safety of the ship connected with the elevated cable in the wave can be achieved.

Description

Technical Field

[0001] This application relates to the field of ship navigation, specifically to a method and apparatus for analyzing the safety of ships with overhead cable connections in waves, electronic equipment, and computer-readable storage media. Background Technology

[0002] At-sea replenishment is a crucial aspect of naval logistics support and a vital pillar for survival during long-distance voyages. During replenishment operations, two ships sail parallel to each other in the same direction and at the same speed within a limited distance, connected by overhead rigging to facilitate cargo replenishment. This involves the interaction of complex wave systems, including incident waves, waves generated by the movement of the two ships, and radiated / diffracted waves. In high sea states, replenishment operations inevitably involve multiple coupling effects: wave motion, the motion of the two ships involved in the replenishment, and the overhead rigging. Under certain conditions, these strong coupling effects can severely impact the stability and safety of the replenishment operation.

[0003] Therefore, how to predict the motion characteristics of two ships connected by overhead cables under different wave and navigation conditions through calculation and simulation in advance, so as to provide data support for the safety assessment of large ships' maritime replenishment operations and improve navigation safety, has become an urgent problem to be solved. Summary of the Invention

[0004] In view of this, it is necessary to provide a method and apparatus for analyzing the safety of ships with overhead cable connections in waves, as well as electronic equipment and computer-readable storage media, so as to achieve the technical effect of improving the navigation safety of ships with overhead cable connections in waves.

[0005] To address the aforementioned technical problems, firstly, this application provides a method for analyzing the safety of ships with overhead cable connections in waves, comprising: Obtain the parameters of the first vessel, the parameters of the second vessel, and the location data of the overhead cable connecting the first vessel and the second vessel; Based on the first ship parameters, the second ship parameters, and the overhead cable position data, a set of coupled ship motion equations is constructed. The set of coupled ship motion equations includes the forces and moments exerted by the overhead cable on the first ship and the second ship. Based on the set wave data, the coupled motion equations of the ships are solved to obtain the coupled motion data of the first ship, the coupled motion data of the second ship, and the mechanical data of the overhead cable under the set wave data; The safety of the first and second vessels under the set wave data is determined based on the first vessel coupled motion data, the second vessel coupled motion data, and the overhead cable mechanical data.

[0006] In one possible embodiment, the ship's coupled motion equations include a boundary value equation set and a coupled motion equation set, wherein solving the ship's coupled motion equations based on set wave data includes: Based on the set wave data, the boundary value equations are solved to obtain the velocity potential of the first ship and the velocity potential of the second ship. The velocity potential of the first ship includes the coupled motion data of the first ship, and the velocity potential of the second ship includes the coupled motion data of the second ship. The radial wave force of the first ship and the radial wave force of the second ship are obtained based on the first ship velocity potential and the second ship velocity potential. Based on the first ship's radiated wave force, the first ship's incident wave force and coupled diffracted wave force, and the second ship's radiated wave force, the second ship's incident wave force and coupled diffracted wave force, the coupled motion equations are solved to obtain the first ship's coupled motion data, the second ship's coupled motion data and the elevated cable mechanical data.

[0007] In one possible embodiment, the boundary value equation system includes: ; ; , ; , ; , ; in, The total velocity potential of the ship's coupled motion. The total radiation potential of the ship's coupled motion. The total diffraction potential of the two ships is given. The potential of the incident wave velocity; This refers to the spatial component of the total radiation potential of the ship's coupled motion system. This refers to the wave velocity potential space portion of the defined wave data. The space portion of the coupled diffraction velocity potential between the first and second ships. As a time factor, The radial velocity potential of the first ship when the first ship is forced to move while the second ship remains stationary. The radial velocity potential of the second ship when the first ship is forced to move while the second ship remains stationary. The radial velocity potential of the first ship when the second ship is forced to move while the first ship remains stationary. The radial velocity potential of the second vessel when the second vessel is forced to move while the first vessel remains stationary. The encounter frequency between the first vessel and the second vessel. The speeds of the first and second vessels are given. The change in the boundary conditions of the first ship caused by the coupled motion of the first ship. The change in the boundary conditions of the second ship caused by the coupled motion of the second ship; Let be the generalized normal vector of the first vessel. Let be the generalized normal vector of the second vessel; The wetted surface below the average waterline of the first vessel; The wetted surface below the average waterline of the second vessel; Let the normal direction of the first vessel be denoted as . This is the normal direction of the second vessel.

[0008] In one possible embodiment, obtaining the first ship-radiated wave force of the first ship and the second ship-radiated wave force of the second ship based on the first ship velocity potential and the second ship velocity potential includes: Based on formula The first ship's radiated wave force induced by the first ship's coupled motion is obtained; Based on formula The first ship's radiated wave force induced by the second ship's coupled motion is obtained; Based on formula The second ship's radiated wave force induced by the first ship's coupled motion is obtained; Based on formula The second ship's radiated wave force induced by the second ship's coupled motion is obtained.

[0009] in, , The speeds of the first and second vessels are given. The imaginary unit in mathematics. The density of the medium in which the two ships are sailing, usually the density of fresh water or seawater; The amplitude of motion of the first vessel; The motion amplitude of the second and first ships.

[0010] In one possible embodiment, the coupled set of motion equations includes: ; in, The incident wave force of the first ship and the first ship diffraction wave force The sum of The incident wave force of the second ship and the first ship diffraction wave force The sum of The restoring force of the first vessel. Here is the restoring force coefficient matrix of the first vessel. For the restoring force of the second vessel, This is the restoring force coefficient matrix of the second vessel. The force and moment exerted by the overhead cable on the first vessel. The force and moment exerted by the overhead cable on the second vessel. This represents the total number of overhead rigging. For the constant tension of the s-th overhead cable, The location of the overhead cables of the first vessel. The location of the overhead cables of the second vessel. Let be the radius vector of the position of the overhead cable in the first vessel relative to the center of gravity of the first vessel. , , These are the coordinates of the center of gravity of the first vessel. Let be the radius vector of the position of the overhead cable in the second vessel relative to the center of gravity of the second vessel. , , These are the coordinates of the center of gravity of the second vessel; Let be the generalized mass matrix of the first vessel, which includes the hull mass and the moment of inertia of the hull. Let be the generalized mass matrix of the second vessel, which includes the hull mass and the hull's moment of inertia.

[0011] In one possible embodiment, it further includes: Solving formula Get initial value , , , , , and , , , , , ; in, , , , , , These are the pitch, sway, heave, roll, pitch, and yaw parameters of the first vessel. , , , , , These are the heave, sway, heave, roll, pitch, and yaw parameters of the second vessel, respectively. Based on formula group ; ; ; ; ; ; Real-time calculation yields the iteration steps n The corresponding locations of the overhead cables in the first vessel and the overhead cables in the second vessel.

[0012] In one possible embodiment, after determining the safety of the first vessel and the second vessel under the set wave data based on the first vessel coupled motion data, the second vessel coupled motion data, and the overhead cable mechanics data, the method further includes: In response to the fact that the safety of the first vessel and the second vessel under the set wave data does not meet the set conditions, the overhead cable position data is adjusted until the safety of the first vessel and the second vessel under the set wave data meets the set conditions.

[0013] Secondly, this application provides a ship safety analysis device for overhead cable connections in waves, comprising: The data acquisition module is used to acquire the first ship parameters of the first ship, the second ship parameters of the second ship, and the position data of the overhead cable connecting the first ship and the second ship. The motion analysis module is used to construct a set of coupled motion equations for the ship based on the first ship parameters, the second ship parameters, and the position data of the overhead cable. The set of coupled motion equations for the ship includes the forces and moments exerted by the overhead cable on the first ship and the second ship. The solution module is used to solve the ship coupled motion equations based on the set wave data, and to obtain the first ship coupled motion data of the first ship, the second ship coupled motion data of the second ship, and the overhead cable mechanical data under the set wave data; A safety analysis module is used to determine the safety of the first vessel and the second vessel under the set wave data based on the first vessel coupled motion data, the second vessel coupled motion data, and the overhead cable mechanical data.

[0014] Thirdly, this application also provides an electronic device, including a memory and a processor, wherein, The memory is used to store programs; The processor, coupled to the memory, is used to execute the program stored in the memory to implement the steps in the ship safety analysis method for overhead cable connections in waves as described in any of the above implementations.

[0015] Fourthly, this application also provides a computer-readable storage medium for storing a computer-readable program or instruction, which, when executed by a processor, can implement the steps in the ship safety analysis method for overhead cable connections in waves described in any of the above implementations.

[0016] The beneficial effects of this application are: Compared with related technologies, the safety analysis method, apparatus, electronic equipment, and computer-readable storage medium for cable-stayed ships in waves provided in this application pre-acquire first ship parameters of the first ship, second ship parameters of the second ship, and cable position data of the cable connecting the first and second ships. Then, based on the first ship parameters, second ship parameters, and cable position data, a set of coupled ship motion equations is constructed. Since the coupled ship motion equations include the forces and moments exerted by the cable on the first and second ships, they can better quantitatively analyze the impact of the cable's mechanical properties on the motion data of the first and second ships during navigation in wave environments. This results in higher accuracy of the coupled motion data of the first and second ships, as well as the cable's mechanical data, obtained by solving the coupled ship motion equations based on set wave data. It also allows for more accurate prediction of the motion characteristics of the two ships connected by the cable under different wave and navigation conditions, providing more precise data support for the safety assessment of large ships' maritime replenishment operations, thereby improving the technical effect of enhancing the navigation safety of ships connected by cable in waves. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A flowchart illustrating the ship safety analysis method for overhead cable connections in waves provided in this application embodiment; Figure 2 This is a schematic diagram of the first and second vessels in the ship safety analysis method for overhead cable connections in waves provided in the embodiments of this application; Figure 3 This is a schematic diagram of the dense grid structure of the first vessel in the ship safety analysis method for overhead cable connections in waves provided in the embodiments of this application; Figure 4 This is a schematic diagram of the sparse grid structure of the first vessel in the safety analysis method for elevated cable connections in waves provided in this application embodiment; Figure 5 This is a schematic diagram of the dense grid structure of the second vessel in the safety analysis method for elevated cable connections in waves provided in the embodiments of this application; Figure 6 This is a schematic diagram of the sparse grid structure of the second vessel in the ship safety analysis method for overhead cable connections in waves provided in the embodiments of this application; Figure 7 This is a schematic diagram of the process for solving the coupled motion equations of a ship based on set wave data in the ship safety analysis method for overhead cable connections in waves provided in the embodiments of this application. Figure 8 A schematic diagram of the ship safety analysis device for overhead cable connections in waves provided in an embodiment of this application; Figure 9 This is a schematic diagram of the structure of an electronic device provided in one embodiment of this application. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0020] In the description of the embodiments of this application, unless otherwise stated, "multiple" means two or more. "And / or" describes the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone.

[0021] The terms "first," "second," etc., used in the embodiments of this application are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a technical feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature.

[0022] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0023] This application provides a method and apparatus for analyzing the safety of ships with overhead cable connections in waves, as well as electronic equipment and computer-readable storage media, which are described below.

[0024] Please refer to Figure 1 The ship safety analysis method for overhead cable connections in waves provided in this application embodiment includes: Step S101: Obtain the first ship parameters of the first ship, the second ship parameters of the second ship, and the position data of the overhead cable connecting the first ship and the second ship.

[0025] In this step, the first and second ship parameters include not only basic ship parameters such as dimensions, structure, kinematic performance, and draft of the first and second ships, but also dynamic data such as their speeds. The overhead cable position data includes the overhead cable position data for the first ship with overhead cables installed on it, and the overhead cable position data for the second ship with overhead cables installed on it. In this application, the two ends of a single overhead cable are respectively installed on the first and second ships; therefore, the overhead cable position data for the first and second ships corresponds one-to-one.

[0026] In this application, please refer to Figure 2To better analyze the shape, position, and other parameters of the first vessel, the second vessel, and the overhead cable, a spatial coordinate system was constructed. The first vessel, the second vessel, and the overhead cable were then spatially modeled within this coordinate system. Furthermore, a navigation surface model was created to simulate the specific scenarios of the first and second vessels navigating on the water. Specifically, this included: selecting two vessels for analysis, namely the first vessel (vessel a) and the second vessel (vessel b), and obtaining 3D line drawing diagrams of the first and second vessels in .igs file format. These diagrams could be at scaled-down model size or actual vessel size; and establishing 3D Cartesian coordinate systems for the first and second vessels respectively, with the origin of the first vessel's 3D Cartesian coordinate system being... The origin of the second ship's three-dimensional Cartesian coordinate system is... Two coordinate systems x Shaft and y The origin of the coordinate system is located in the middle of the two ships, and the origin of the z-axis is located on the undisturbed still water surface; where... x The direction of the axis pointing towards the bow is positive. y The axis pointing towards the port side of the hull is considered positive. z The axis is vertically upward as positive; determine the position coordinates of the overhead cables in the first ship in their respective three-dimensional Cartesian coordinate systems. The location of the overhead cable in the second ship , i This is the number of the overhead cable, with a value ranging from 1 to... N It also includes the longitudinal and lateral relative positions of the two ships; where the longitudinal relative position is the longitudinal distance between the two ships. The lateral position refers to the distance between the mid-longitudinal sections of the two ships. .

[0027] For further details, please refer to Figures 3 to 6 Furthermore, based on mesh generation software, dense meshes (more mesh nodes distributed on the surface) and sparse meshes (relatively fewer mesh nodes distributed on the surface) were generated for the surfaces of the first and second vessels below the waterline. Specifically, based on the aforementioned .igs format 3D linetype files of the first and second vessels, mesh generation software was used to generate meshes for the hull surfaces of the first and second vessels below the average draft waterline. The meshes were divided into dense and sparse meshes; the dense meshes consisted of more mesh nodes distributed in the longitudinal and vertical directions of the hull.

[0028] Step S102: Construct a set of coupled motion equations for the ships based on the first ship parameters, the second ship parameters, and the position data of the overhead cables. The set of coupled motion equations for the ships includes the forces and moments exerted by the overhead cables on the first and second ships.

[0029] In this step, the ship's coupled motion equations include the boundary value equations and the coupled motion equations. The boundary value equations include: ; ; , ; , ; , ; in, The total velocity potential of the ship's coupled motion. The total radiation potential of the ship's coupled motion. The total diffraction potential of the two ships, The potential of the incident wave velocity; This refers to the spatial component of the total radiation potential of the ship's coupled motion system. To define the potential space component of wave velocity in wave data, For the coupled diffraction velocity potential space component of the first and second ships, As a time factor, The radial velocity potential of the first ship when the first ship is forced to move while the second ship remains stationary. When the first ship is forced to move while the second ship remains stationary, the radial velocity potential of the second ship. When the second ship is forced to move while the first ship remains stationary, the radial velocity potential of the first ship is... The radial velocity potential of the second ship when the first ship remains stationary while the second ship is forced into motion. The frequency of encounters between the first and second vessels. The speeds of the first and second vessels; The change in the boundary conditions of the first ship caused by the coupled motion of the first ship. The change in the boundary conditions of the second ship caused by the coupled motion of the second ship; Let be the generalized normal vector of the first ship. Let be the generalized normal vector of the second vessel; The wetted surface below the average waterline of the first vessel; The wetted surface below the average waterline of the second vessel; For the normal direction of the first vessel, The orientation of the second vessel.

[0030] The coupled set of equations of motion includes: ; in, For the incident wave force of the first ship and the first ship diffraction wave force The sum of For the incident wave force of the second ship and the first ship diffraction wave force The sum of For the resilience of the first vessel, This is the restoring force coefficient matrix of the first ship. For the resilience of the second vessel, This is the restoring force coefficient matrix for the second vessel. The forces and moments exerted by the overhead cables on the first vessel. The forces and moments exerted by the overhead cables on the second vessel. This represents the total number of overhead rigging. For the constant tension of the s-th overhead cable, The location of the overhead cables for the first vessel. The location of the overhead cables for the second vessel. Let be the radius vector of the position of the overhead cable in the first vessel relative to the center of gravity of the first vessel. , , These are the coordinates of the center of gravity of the first vessel. Let be the radius vector of the position of the overhead cables in the second vessel relative to the center of gravity of the second vessel. , , These are the coordinates of the center of gravity of the second vessel; The generalized mass matrix of the first ship includes the hull mass and the moment of inertia of the hull. The generalized mass matrix of the second vessel includes the hull mass and the hull's moment of inertia.

[0031] Furthermore, as the first and second vessels move with the waves, the positions of the overhead cables in the first and second vessels change. During this process, the overhead cables also influence the motion of the first and second vessels, resulting in coupled motion between the first vessel, the second vessel, and the overhead cables. Therefore, in this application, when subsequently solving the coupled motion equations, the positions of the overhead cables in the first and second vessels are calculated in real-time, following the motion of the first and second vessels and considering the influence of the overhead cables on their coupled motion. Specifically, this includes: First, solve the formula. Get initial value , , , , , and , , , , , The initial value, i.e., ignoring the influence of the overhead cables, represents the position of the overhead cables in the first vessel and the second vessel, which depends only on the coupled motion of the first and second vessels. , , , , , These are the heave, sway, heave, roll, pitch, and yaw parameters of the first vessel. , , , , , These are the heave, sway, heave, roll, pitch, and yaw parameters for the second vessel. Then, based on the formula set: ; ; ; ; ; ; Real-time calculation yields the iteration steps n The corresponding positions of the overhead cables in the first and second vessels are given. The iteration steps n = 1, 2, 3…m are the iterative process numbers for solving the coupled motion equations, where m is the maximum number of iterations. Subsequent calculations can then be performed. .

[0032] Among them, the iteration step n This is the number for the iteration process. In the first iteration, n=1, and the positions of the overhead cables in the first and second ships are the initial values. and At the same time, the initial value , , , , , and , , , , , Substituting into the above formula, we obtain the iteration result when n=1. and( Then, a second iteration is performed, where n=2. The corresponding positions of the overhead cables in the first and second ships are the results obtained from the previous iteration. ( and ( Based on the results of the previous iteration, the iteration is performed again to obtain the iteration result when n=2. ( and( Continue this process until the iteration ends, obtaining the iteration result when n=m. ( and( 。

[0033] Step S103: Solve the ship coupled motion equations based on the set wave data to obtain the first ship coupled motion data of the first ship, the second ship coupled motion data of the second ship, and the overhead cable mechanical data under the set wave data.

[0034] In this step, please refer to Figure 7 Solving the ship's coupled motion equations based on given wave data includes: Step S701: Solve the boundary value equations based on the set wave data to obtain the velocity potential of the first ship and the velocity potential of the second ship. The velocity potential of the first ship includes the coupled motion data of the first ship, and the velocity potential of the second ship includes the coupled motion data of the second ship.

[0035] In this step, the wave data is specifically defined as wave data that simulates real waves, including wave velocity potential, wave incidence angle, and incident wave force. Based on this, the defined wave data is substituted into the boundary value equations provided in step S102 above to solve for the coupled motion data of the first ship. The first ship velocity potential is indicated , The second ship coupled motion data The second ship velocity potential is indicated , .

[0036] Step S702: Based on the first ship velocity potential and the second ship velocity potential, obtain the first ship radiation wave force of the first ship and the second ship radiation wave force of the second ship.

[0037] In this step, the specific formula is used. The first ship's coupled motion-induced first ship radial wave force is obtained; based on the formula The first ship-radiated wave force induced by the second ship's coupled motion is obtained; based on the formula The second ship's radial wave force induced by the first ship's coupled motion is obtained; based on the formula The second ship's radiated wave force induced by the second ship's coupled motion is obtained. Among them, , The speeds of the first and second ships. The imaginary unit in mathematics. The density of the medium in which the two ships are sailing, usually the density of fresh water or seawater; The amplitude of motion of the first vessel; The motion amplitude of the second and first ships.

[0038] Step S703: Solve the coupled motion equations based on the first ship's radiated wave force and the second ship's radiated wave force to obtain the coupled motion data of the first ship, the coupled motion data of the second ship, and the mechanical data of the overhead cable.

[0039] In this step, the first ship radiation wave force and the second ship radiation wave force calculated above are substituted into the coupled motion equations provided in step S102 above for solving, and the coupled motion data of the first ship are obtained. Second ship coupled motion data and cable mechanics data and .

[0040] Step S104: Determine the safety of the first and second ships under set wave data based on the coupled motion data of the first ship, the coupled motion data of the second ship, and the mechanical data of the overhead cable.

[0041] In this step, the safety of the first and second vessels is analyzed using pre-set thresholds for vessel coupled motion data and overhead cable mechanics data. Specifically, it is determined whether the coupled motion data of the first and second vessels exceeds the vessel coupled motion data threshold, and whether the overhead cable mechanics data exceeds the overhead cable mechanics data threshold. If both the first and second vessel coupled motion data and the overhead cable mechanics data do not exceed the threshold, then the safety of the first and second vessels under the set wave data is determined to meet the set conditions. Conversely, if either the first or second vessel coupled motion data exceeds the threshold, or the overhead cable mechanics data exceeds the threshold, then the safety of the first and second vessels under the set wave data does not meet the set conditions.

[0042] Furthermore, in some embodiments of this application, in response to the fact that the safety of the first vessel and the second vessel under the set wave data does not meet the set conditions, the overhead cable position data can be adjusted until the safety of the first vessel and the second vessel under the set wave data meets the set conditions, and then the overhead cable position data at this time is provided to the user, so as to facilitate the user to set the overhead cable better and more safely.

[0043] Compared with related technologies, the safety analysis method for ships connected by overhead cables in waves provided in this embodiment obtains the first ship parameters of the first ship, the second ship parameters of the second ship, and the position data of the overhead cables connecting the first and second ships in advance. Then, a set of coupled motion equations of the ships is constructed based on the first ship parameters, the second ship parameters, and the position data of the overhead cables. Since the set of coupled motion equations of the ships includes the forces and moments exerted by the overhead cables on the first and second ships, the set of coupled motion equations of the ships can better perform quantitative data analysis on the impact of the mechanical properties of the overhead cables on the motion data of the first and second ships during navigation. This makes the accuracy of the coupled motion data of the first ship, the coupled motion data of the second ship, and the mechanical data of the overhead cables obtained by solving the set of coupled motion equations of the ships based on the set wave data higher. It can make more accurate predictions of the motion characteristics of the two ships connected by overhead cables under different wave and navigation conditions, and provide more accurate data support for the safety assessment of large ships' maritime replenishment operations, thereby achieving the technical effect of improving the navigation safety of ships connected by overhead cables in waves.

[0044] To better implement the ship safety analysis method for overhead cable connections in waves in the embodiments of this application, based on the ship safety analysis method for overhead cable connections in waves, correspondingly, as follows: Figure 8 As shown in the embodiment of this application, a ship safety analysis device for overhead cable connections in waves is also provided. The ship safety analysis device for overhead cable connections in waves includes: The data acquisition module 801 is used to acquire parameters of the first vessel, parameters of the second vessel, and the position data of the overhead cable connecting the first vessel and the second vessel. The motion analysis module 802 is used to construct a set of coupled motion equations for the ship based on the first ship parameters, the second ship parameters, and the position data of the overhead cable. The set of coupled motion equations for the ship includes the forces and moments exerted by the overhead cable on the first and second ships. The solver module 803 is used to solve the ship coupled motion equations based on the set wave data, and to obtain the first ship coupled motion data of the first ship, the second ship coupled motion data of the second ship, and the overhead cable mechanical data under the set wave data. The safety analysis module 804 is used to determine the safety of the first and second ships under set wave data based on the coupled motion data of the first ship, the coupled motion data of the second ship, and the mechanical data of the overhead cable.

[0045] The ship safety analysis device for overhead cable connections in waves provided in the above embodiments can realize the technical solutions described in the above embodiments of the ship safety analysis method for overhead cable connections in waves. The specific implementation principles of each module or unit can be found in the corresponding content in the above embodiments of the ship safety analysis method for overhead cable connections in waves, and will not be repeated here.

[0046] Please refer to Figure 9 This application also provides an electronic device 900. The electronic device 900 includes a processor 901, a memory 902, and a display 903. Figure 9 Only some components of the electronic device 900 are shown, but it should be understood that it is not required to implement all of the components shown, and more or fewer components may be implemented instead.

[0047] In some embodiments, processor 901 may be a central processing unit (CPU), microprocessor, or other data processing chip, used to run program code stored in memory 902 or process data, such as the ship safety analysis method for overhead cable connections in waves in this application.

[0048] In some embodiments, processor 901 may be a single server or a group of servers. The server group may be centralized or distributed. In some embodiments, processor 901 may be local or remote. In some embodiments, processor 901 may be implemented on a cloud platform. In one embodiment, the cloud platform may include a private cloud, public cloud, hybrid cloud, community cloud, distributed cloud, intranet, multi-cloud, etc., or any combination thereof.

[0049] In some embodiments, memory 902 may be an internal storage unit of electronic device 900, such as a hard disk or memory of electronic device 900. In other embodiments, memory 902 may also be an external storage device of electronic device 900, such as a plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, etc. equipped on electronic device 900.

[0050] Furthermore, the memory 902 may include both internal storage units of the electronic device 900 and external storage devices. The memory 902 is used to store application software and various types of data installed on the electronic device 900.

[0051] In some embodiments, display 903 may be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, or an OLED (Organic Light-Emitting Diode) touchscreen. Display 903 is used to display information from electronic device 900 and to display a visual user interface. Components 901-903 of electronic device 900 communicate with each other via a system bus.

[0052] In one embodiment, when processor 901 executes the ship safety analysis program for overhead cable connections in waves stored in memory 902, the following steps can be performed: Obtain the parameters of the first vessel, the parameters of the second vessel, and the location data of the overhead cable connecting the first and second vessels; Based on the first ship parameters, the second ship parameters, and the location data of the overhead cable, a set of coupled motion equations for the ship is constructed. The set of coupled motion equations for the ship includes the forces and moments exerted by the overhead cable on the first and second ships. Based on the set wave data, the coupled motion equations of the ships are solved to obtain the coupled motion data of the first ship, the coupled motion data of the second ship, and the mechanical data of the overhead cable under the set wave data. The safety of the first and second vessels under set wave data is determined based on the coupled motion data of the first vessel, the coupled motion data of the second vessel, and the mechanical data of the overhead cable.

[0053] It should be understood that when the processor 901 executes the ship safety analysis program for the overhead cable connection in waves stored in the memory 902, in addition to the functions mentioned above, it can also perform other functions, as detailed in the description of the corresponding method embodiments above.

[0054] Furthermore, this application does not specifically limit the type of electronic device 900 mentioned in the embodiments. Electronic device 900 can be a mobile phone, tablet computer, personal digital assistant (PDA), wearable device, laptop computer, or other portable electronic device. Exemplary embodiments of portable electronic devices include, but are not limited to, portable electronic devices running iOS, Android, Microsoft, or other operating systems. The aforementioned portable electronic device can also be other portable electronic devices, such as a laptop computer with a touch-sensitive surface (e.g., a touch panel). It should also be understood that in some other embodiments of this application, electronic device 900 may not be a portable electronic device, but rather a desktop computer with a touch-sensitive surface (e.g., a touch panel).

[0055] Accordingly, this application also provides a computer-readable storage medium for storing computer-readable programs or instructions. When the programs or instructions are executed by a processor, they can implement the steps or functions of the ship safety analysis method for overhead cable connections in waves provided in the above-described method embodiments.

[0056] Those skilled in the art will understand that all or part of the processes of the methods described in the above embodiments can be implemented by a computer program instructing related hardware (such as a processor, controller, etc.), and the computer program can be stored in a computer-readable storage medium. The computer-readable storage medium may be a disk, optical disk, read-only memory, or random access memory, etc.

[0057] The above provides a detailed description of the ship safety analysis method, apparatus, electronic equipment, and storage medium for overhead cable connections in waves provided in this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this application. At the same time, those skilled in the art will recognize that there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A method for analyzing the safety of ships with overhead cable connections in waves, characterized in that, include: Obtain the first ship parameters of the first ship, the second ship parameters of the second ship, and the overhead cable position data of the overhead cable connecting the first ship and the second ship; Based on the first ship parameters, the second ship parameters, and the overhead cable position data, a set of ship coupled motion equations is constructed. The set of ship coupled motion equations includes the forces and moments exerted by the overhead cable on the first ship and the second ship. Based on the set wave data, the ship coupled motion equations are solved to obtain the first ship coupled motion data of the first ship, the second ship coupled motion data of the second ship, and the overhead cable mechanical data under the set wave data; The safety of the first and second vessels under the set wave data is determined based on the first vessel coupled motion data, the second vessel coupled motion data, and the overhead cable mechanical data.

2. The method for analyzing ship safety in wave-supported cable connections according to claim 1, characterized in that, The ship's coupled motion equations include a boundary value equation set and a coupled motion equation set. Solving the ship's coupled motion equations based on given wave data includes: Based on the set wave data, the boundary value equations are solved to obtain the first ship velocity potential of the first ship and the second ship velocity potential of the second ship. The first ship velocity potential includes the coupled motion data of the first ship, and the second ship velocity potential includes the coupled motion data of the second ship. Based on the first ship velocity potential and the second ship velocity potential, the first ship radiation wave force, the second ship radiation wave force, the first ship diffraction wave force and the incident wave force, and the second ship diffraction wave force and the incident wave force are obtained. Based on the radiated wave force, diffracted wave force, and incident wave force of the first ship, and the radiated wave force, diffracted wave force, and incident wave force of the second ship, the coupled motion equations are solved to obtain the coupled motion data of the first ship, the coupled motion data of the second ship, and the mechanical data of the elevated cable.

3. The method for analyzing ship safety in wave-supported cable connections according to claim 2, characterized in that, The boundary value equation system includes: ； ； ， ； ， ； ， ； in, The total velocity potential of the ship's coupled motion. The total radiation potential of the ship's coupled motion. The total diffraction potential of the two ships is given. The incident wave velocity potential; This refers to the spatial component of the total radiation potential of the ship's coupled motion system. This refers to the wave velocity potential space portion of the defined wave data. The space portion of the coupled diffraction velocity potential between the first and second ships. As a time factor, The radial velocity potential of the first ship when the first ship is forced to move while the second ship remains stationary. The radial velocity potential of the second ship when the first ship is forced to move while the second ship remains stationary. The radial velocity potential of the first ship when the second ship is forced to move while the first ship remains stationary. The radial velocity potential of the second vessel when the second vessel is forced to move while the first vessel remains stationary. The encounter frequency between the first vessel and the second vessel. The speeds of the first and second vessels are given. The change in the boundary conditions of the first ship caused by the coupled motion of the first ship. The change in the boundary conditions of the second ship caused by the coupled motion of the second ship; Let be the generalized normal vector of the first vessel. Let be the generalized normal vector of the second vessel; The wetted surface below the average waterline of the first vessel; The wetted surface below the average waterline of the second vessel; Let the normal direction of the first vessel be denoted as . This is the normal direction of the second vessel.

4. The method for analyzing ship safety in wave-supported cable connections according to claim 2, characterized in that, The process of obtaining the first ship radiation wave force and the second ship radiation wave force based on the first ship velocity potential and the second ship velocity potential includes: Based on formula The first ship's radiated wave force induced by the first ship's coupled motion is obtained; Based on formula The first ship's radiated wave force induced by the second ship's coupled motion is obtained; Based on formula The second ship's radiated wave force induced by the first ship's coupled motion is obtained; Based on formula The second ship's radiated wave force induced by the second ship's coupled motion is obtained; in, , The speeds of the first and second vessels are given. The imaginary unit in mathematics. The density of the medium in which the two ships are sailing, usually the density of fresh water or seawater; The amplitude of motion of the first vessel; This is the motion amplitude of the second vessel.

5. The method for analyzing ship safety in wave-supported cable connections according to claim 2, characterized in that, The coupled set of motion equations includes: ； in, The incident wave force of the first ship and the first ship diffraction wave force the sum of The incident wave force of the second ship and the first ship diffraction wave force the sum of The restoring force of the first vessel. Here is the restoring force coefficient matrix of the first vessel. For the restoring force of the second vessel, This is the restoring force coefficient matrix of the second vessel. The force and moment exerted by the overhead cable on the first vessel. The force and moment exerted by the overhead cable on the second vessel. This represents the total number of overhead rigging. For the constant tension of the s-th overhead cable, The location of the overhead cables of the first vessel. The location of the overhead cables of the second vessel. Let be the radius vector of the position of the overhead cable in the first vessel relative to the center of gravity of the first vessel. , , These are the coordinates of the center of gravity of the first vessel. Let be the radius vector of the position of the overhead cable in the second vessel relative to the center of gravity of the second vessel. , , These are the coordinates of the center of gravity of the second vessel; Let be the generalized mass matrix of the first vessel, which includes the hull mass and the moment of inertia of the hull. Let be the generalized mass matrix of the second vessel, which includes the hull mass and the hull's moment of inertia.

6. The method for analyzing ship safety in wave-supported cable connections according to claim 5, characterized in that, Also includes: Solving formula Get initial value , , , , , and , , , , , ; in, , , , , , These are the pitch, sway, heave, roll, pitch, and yaw parameters of the first vessel. , , , , , These are the heave, sway, heave, roll, pitch, and yaw parameters of the second vessel, respectively. Based on formula group ; ； ； ； ； ； Real-time calculation yields iteration steps n The corresponding locations of the overhead cables in the first vessel and the overhead cables in the second vessel.

7. The method for analyzing the safety of ships with overhead cable connections in waves according to claim 1, characterized in that, After determining the safety of the first and second vessels under the set wave data based on the first vessel coupled motion data, the second vessel coupled motion data, and the overhead cable mechanical data, the method further includes: In response to the fact that the safety of the first vessel and the second vessel under the set wave data does not meet the set conditions, the overhead cable position data is adjusted until the safety of the first vessel and the second vessel under the set wave data meets the set conditions.

8. A ship safety analysis device for overhead cable connections in waves, characterized in that, include: The data acquisition module is used to acquire parameters of the first vessel, parameters of the second vessel, and position data of the overhead cable connecting the first vessel and the second vessel. The motion analysis module is used to construct a set of coupled motion equations for the ship based on the first ship parameters, the second ship parameters, and the position data of the overhead cable. The set of coupled motion equations for the ship includes the forces and moments exerted by the overhead cable on the first ship and the second ship. The solution module is used to solve the ship's coupled motion equations based on set wave data, and to obtain the coupled motion data of the first ship, the coupled motion data of the second ship, and the mechanical data of the overhead cable under the set wave data. A safety analysis module is used to determine the safety of the first vessel and the second vessel under the set wave data based on the first vessel coupled motion data, the second vessel coupled motion data, and the overhead cable mechanical data.

9. An electronic device, characterized in that, Including memory and processor, among which, The memory is used to store programs; The processor, coupled to the memory, is used to execute the program stored in the memory to implement the steps in the ship safety analysis method for overhead cable connections in waves as described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, Used to store computer-readable programs or instructions, which, when executed by a processor, are capable of implementing the steps in the ship safety analysis method for overhead cable connections in waves as described in any one of claims 1 to 7.

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