Design evaluation method and system for torsion resistance of mooring system

Abstract

The invention relates to the technical field of anti-torsion evaluation of offshore platforms, in particular to an anti-torsion design evaluation method and system for a mooring system, and the method comprises the steps: calculating the anti-torsion design of the mooring system according to the area of the projection, corresponding to all platform equipment, of wind in each angle region in the direction, and the distance between the centroid point and the central axis of all platform equipment; determining the optimal placement positions of all platform equipment of the upper platform; adjusting the position placement of the platform equipment of the upper platform through the optimal placement position, and performing anti-torsion experimental design evaluation through the mooring system at the optimal placement position; under the action of the target wind, the variation of the overall tension increase of the floating body and the torque of the tensioning type mooring system under the action of the target wind are obtained, and the optimal structure parameters of the floating body are obtained; the floating body structure is adjusted through the optimal structure parameters of the floating body, and the optimal floating body structure is obtained. According to the invention, the structure of the floating body is optimized, so that the long-term reliability and the operation efficiency of offshore platform equipment are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of anti-torsion evaluation of offshore platforms, and particularly to a design evaluation method and system for anti-torsion of a mooring system. Background Art

[0002] Anti-torsion of a mooring system refers to designing and improving the mooring system so that it can effectively resist torsion generated by external forces (such as waves, wind, etc.), ensuring the stability and safety of equipment in the marine environment. By reasonable design, optimizing materials and structures, and enhancing the anti-torsion ability, equipment damage can be reduced, long-term use reliability can be improved, and accident risks can be lowered.

[0003] Compared with a catenary floating foundation and a mooring system, a tension leg floating foundation and a mooring system can effectively reduce the sea area used, reduce the displacement of the floating body and the cost, and have broad application prospects. However, when the upper platform equipment of the tension leg foundation is relatively scattered and of different sizes, the entire platform will twist due to uneven stress. If the mooring system cannot provide enough tensile force, the floating body cannot be restored to its original position, and the phenomenon of mooring anchor chain torsion and knotting will occur; in order to improve the stability of the platform structure, it is necessary to determine by analyzing the structure of the platform system; therefore, an evaluation method can be designed to analyze the anti-torsion situation of the mooring system; thereby optimizing the system design, reducing potential risks, and also improving the long-term reliability and operating efficiency of offshore platform equipment. Summary of the Invention

[0004] The present invention provides a design evaluation method and system for anti-torsion of a mooring system to solve existing problems.

[0005] The object of the present invention can be achieved by the following technical solutions: In a first aspect of the present invention, a design evaluation method for anti-torsion of a mooring system is provided, including: Dividing a number of angular regions by a preset division angle to obtain the central axis of the upper platform; obtaining the projections of the wind blowing in each angular region on all platform equipment, and obtaining the moment offset degree of each angular region according to the area of the projections of the wind blowing in each angular region on all platform equipment and the distance between the centroid points of all platform equipment and the central axis; determining the optimal placement positions of all platform equipment on the upper platform according to the difference distribution of the moment offset degrees of all angular regions; adjusting the placement positions of the platform equipment on the upper platform through the optimal placement positions, and conducting an experimental design evaluation of anti-torsion through the mooring system at the optimal placement positions; Determining a wind speed for experimental analysis, denoted as the target wind; obtaining the change amount of the overall tensile force increase of the floating body under the action of the target wind; Obtain the torque of the tension mooring system under the action of the target wind; according to the relationship between the change in the overall tension increase of the floating body and the torque of the tension mooring system under the action of the target wind, obtain the optimal structural parameters of the floating body; Adjust the floating body structure through the optimal structural parameters of the floating body to obtain the optimal floating body structure.

[0006] Furthermore, the obtaining of the central axis of the upper platform by dividing into several angular regions through a preset division angle includes: Define the due east direction as the starting direction horizontally to the right; with the centroid of the upper platform as the center point, starting from the starting direction, in the counterclockwise direction, with the preset division angle Divide the circumference into several angular regions; Record the line passing through the centroid of the upper platform and perpendicular to the upper platform as the central axis.

[0007] Furthermore, the obtaining of the torque offset degree of each angular region according to the area of the projection of the wind blowing in each angular region in the direction on all platform devices and the distance between the centroid points of all platform devices and the central axis includes: Obtain the intermediate angle within the angular range of each angular region as the reference angle of each angular region; wherein, the reference angle of each angular region is equal to the included angle between the wind direction and the horizontally right direction;

[0008] In the formula, represents the area of the projection corresponding to the th platform device under the reference angle of the th angular region, represents the distance between the centroid point of the th platform device and the central axis; represents the total number of all platform devices, represents the th angular region's torque offset degree.

[0009] Furthermore, the determining of the best placement positions of all platform devices on the upper platform according to the difference distribution of the torque offset degrees of all angular regions includes: Perform several placement adjustments on the positions of all platform devices on the upper platform device, obtain the torque offset degrees of all angular regions under each placement adjustment, calculate the variance of the torque offset degrees of all angular regions under each placement adjustment, denoted as the variance of each placement; then obtain the maximum value of the torque offset degrees of all angular regions under each placement adjustment; Select the placement position corresponding to the minimum of the maximum values of the variance of each placement and the torque offset degree of all angular regions under each placement adjustment, and denote it as the optimal placement position.

[0010] Further, obtaining the change amount of the overall tension increase of the floating body under the action of the target wind includes:

[0011]

[0012] In the formula, represents the density of seawater, represents the acceleration due to gravity, represents the side length of the square of the floating body, represents the height of the floating body's descent, represents the angle between the tension of the tension leg and the vertical direction, represents the cosine function, represents the change amount of the overall tension increase of the floating body, represents the length of the tension leg between the floating body and the anchoring foundation.

[0013] Further, obtaining the torque of the tension mooring system under the action of the target wind includes:

[0014]

[0015] In the formula, represents the air density, represents, under the action of the target wind, the projected area corresponding to the th platform device; represents the wind speed magnitude of the target wind, represents the force exerted on the th platform device by the target wind; represents the distance between the centroid point of the th platform device and the central axis, represents the total number of all platform devices, represents the torque of the tension mooring system under the action of the target wind.

[0016] Further, obtaining the optimal structural parameters of the floating body according to the relationship between the change amount of the overall tension increase of the floating body and the torque of the tension mooring system under the action of the target wind includes: Determine the initial and of the floating body. According to the initial and of the floating body, obtain the first characteristic parameter , wherein, the first characteristic parameter ; when the first characteristic parameter , directly output the corresponding of the first characteristic parameter and ; when the first characteristic parameter , increment the initial by 1 to obtain , and determine whether and the corresponding meet the conditions; According to and , obtain the second characteristic parameter . When the second characteristic parameter , directly output the corresponding of the second characteristic parameter and ; when the second characteristic parameter , increment the initial by 2 to obtain , and determine whether and the corresponding meet the conditions; And so on, until a structural parameter of a characteristic parameter that meets the conditions is output, then stop the iterative loop; use the structural parameter corresponding to the output characteristic parameter as the optimal structural parameter of the floating body; Wherein, and are the structural parameters of the floating body, and ; Wherein, ; In the formula, represents the horizontal tension of the tension leg, represents the angle between the tension of the tension leg and the vertical direction, represents the sine function, represents the change in the overall tension increase of the floating body; Wherein, represents the preset adjustment coefficient, represents the side length of the square of the floating body, represents the distance between two adjacent connection points on the same edge of the floating body.

[0017] The second aspect of the present invention is to provide a design evaluation system for anti-torsion of a mooring system, including: Position adjustment module: used to divide a number of angular regions through a preset splitting angle, and obtain the central axis of the upper platform; obtain the projections of the wind blowing towards all platform devices in each angular region, and based on the area of the projections of the wind blowing towards all platform devices in each angular region and the distance between the centroid points of all platform devices and the central axis, obtain the torque offset degree of each angular region; determine the optimal placement positions of all platform devices on the upper platform according to the differential distribution of the torque offset degrees of all angular regions; adjust the placement positions of the platform devices on the upper platform through the optimal placement positions, and conduct an experimental design evaluation of anti-torsion through the mooring system at the optimal placement positions; Tensile force change analysis module: used to determine a wind speed for experimental analysis, denoted as the target wind; obtain the change amount of the overall tensile force increase of the floating body under the action of the target wind; Parameter optimization module: used to obtain the torque of the tension mooring system under the action of the target wind under the action of the target wind; obtain the optimal structural parameters of the floating body according to the relationship between the change amount of the overall tensile force increase of the floating body and the torque of the tension mooring system under the action of the target wind; Adjustment module: used to adjust the floating body structure through the optimal structural parameters of the floating body to obtain the optimal floating body structure.

[0018] The third aspect of the present invention is to provide an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the design evaluation method for anti-torsion of a mooring system is implemented.

[0019] The fourth aspect of the present invention is to provide a computer-readable storage medium. The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the design evaluation method for anti-torsion of a mooring system is implemented.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows: By presetting the segmentation angle to divide several angular regions, the accuracy of impact analysis in each direction is improved through the division; According to the wind direction in each angular region, the area of the projection of the wind blowing on all platform devices corresponding to all platform devices, and the distance between the centroid point of all platform devices and the central axis, the torque offset degree of each angular region is obtained; According to the differential distribution of the torque offset degrees of all angular regions, the optimal placement positions of all platform devices on the upper platform are determined; The placement positions of the platform devices on the upper platform are adjusted through the optimal placement positions, and the anti-torsion experimental design evaluation is carried out through the mooring system at the optimal placement positions, reducing the influence caused by the platform devices during the anti-torsion design evaluation of the mooring system; Under the action of the target wind, the change amount of the overall tension increase of the floating body is obtained; The torque of the tension mooring system under the action of the target wind is obtained under the action of the target wind; According to the relationship between the change amount of the overall tension increase of the floating body and the torque of the tension mooring system under the action of the target wind, the optimal structural parameters of the floating body are obtained; The structural parameters of the floating body are optimized through the analysis of system stability, improving the accuracy of floating body optimization; The floating body structure is adjusted through the optimal structural parameters of the floating body to obtain the optimal floating body structure; The optimal floating body structure can maximize the stability and anti-torsion ability of the system; Improve the long-term reliability and operation efficiency of offshore platform equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 It is a schematic flow chart of the steps of a method for anti-torsion design evaluation of a mooring system provided by the present invention; Figure 2 It is a schematic module flow chart of a system for anti-torsion design evaluation of a mooring system provided by the present invention; Figure 3 It is a schematic diagram of a tension mooring system; Figure 4 It is a schematic diagram of the floating body before and after torsion; Figure 5 It is a schematic diagram of the force on the floating body after being pulled down after torsion. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] To enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0024] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0025] In view of the problems existing in the background technology, it is of great practical significance to research and design a design evaluation method and system for anti-torsion of a mooring system.

[0026] As Figure 1 shown, the first aspect of the present invention is to provide a design evaluation method for anti-torsion of a mooring system, including the following steps: Step S001: Divide a number of angular regions through a preset division angle, and obtain the central axis of the upper platform; according to the wind direction in each angular region, the area of the projection of the wind blowing towards all platform devices, and the distance between the centroid points of all platform devices and the central axis, obtain the torque offset degree of each angular region, and determine the optimal placement positions of all platform devices on the upper platform; adjust the positions of the platform devices on the upper platform through the optimal placement positions, and conduct an experimental design evaluation of anti-torsion through the mooring system at the optimal placement positions.

[0027] It should be noted that a schematic diagram of a tension mooring system is as Figure 3As shown in the figure, the tension mooring system includes an anchoring foundation 1, a tension leg 2, a floating body 3, a column 4, an upper platform 5, and platform equipment 6; the platform equipment 6 is above the upper platform 5, the upper platform 5 is connected to the floating body 3 by the column 4, and the floating body 3 is connected to the anchoring foundation 1 by the tension leg 2. Among them, the anchoring foundation, the tension leg, the floating body, the column, and the upper platform are all designed to be centrosymmetric around the centroid. There are multiple platform equipment on the upper platform of the tension mooring system. When there is wind on the sea surface, the wind acts on the platform equipment, causing the wind to generate a lateral moment on the platform, forcing the platform to tilt or shift to a certain extent. Since the design of the tension mooring system is to maintain the vertical stability of the platform (through the tension of the tension leg), the lateral force of the platform will be offset by the tension and length of the tension leg system.

[0028] It should be further noted that since the placement position of the platform equipment on the upper platform of the tension mooring system will affect the magnitude of the lateral moment generated by the platform, in order to reduce the influence of the platform equipment, the optimal placement position is determined by analyzing the placement of the platform equipment in each direction.

[0029] Specifically, the due east direction is defined as the starting direction horizontally to the right and is denoted as direction; with the centroid of the upper platform as the center point, starting from the starting direction, in the counterclockwise direction, with a preset division angle the circumference is divided into several angular regions.

[0030] Starting from the starting direction, in the counterclockwise direction, the several angular regions are respectively denoted as the first angular region, the second angular region,..., the angular region. Among them, represents the number of angular regions.

[0031] Among them, in this embodiment, the preset division angle where in this embodiment, the preset division angle is not specifically limited, and the implementer can determine it according to the specific situation. Among them, the angular range of the first angular region is and the angular range of the second angular region is .

[0032] It should be further noted that in order to adjust the influence of the placement of the platform equipment on the upper platform by the wind, the placement position is adjusted by analyzing the influence of the wind in each angular region on the platform equipment; in order to determine the influence of the wind in each angular region on the platform equipment, the influence of the wind direction in each angular region is selected for analysis.

[0033] Specifically, obtain the intermediate angle within the angular range of each angular region as the reference angle for each angular region; wherein, the reference angle for each angular region is equal to the included angle between the wind direction and the horizontal right direction.

[0034] Denote the line passing through the centroid of the upper platform and perpendicular to the upper platform as the central axis. Blow the wind corresponding to the reference angle of each angular region towards all platform devices, and obtain the projection corresponding to each platform device (i.e., the area of the region corresponding to the force exerted on the platform device by the wind blowing towards the platform device, and it is the region obtained by projecting the said region onto a plane perpendicular to the wind blowing direction); obtain the distance between the centroid point of each platform device and the central axis.

[0035] Obtain the torque offset degree of each angular region according to the area of the projections corresponding to all platform devices under the reference angle of each angular region and the distance between the centroid points of all platform devices and the central axis; the torque offset degree of each angular region is specifically expressed by the formula:

[0036] In the formula, represents the area of the projection corresponding to the th platform device under the reference angle of the th angular region, represents the distance between the centroid point of the th platform device and the central axis; represents the total number of all platform devices, represents the th torque offset degree of the

[0037]

[0038] wherein, the larger the area of the projections corresponding to all platform devices under the reference angle of each angular region, the greater the influence of the wind action, that is, the greater the torque offset degree; the farther the distance between the centroid point of the platform device and the central axis, the greater the torque generated by the wind force, resulting in the device being more likely to shake or shift, so the torque offset degree is greater. Thus, obtain the torque offset degree of each angular region.

[0039] It should be noted that in order to reduce the greater torque offset degree generated when the platform device is affected by the wind, it is necessary to adjust the placement position of the platform device.

[0040] It should be further noted that the smaller the torque offset degree in all angular regions, the smaller the influence of the wind. And the smaller the difference between the torque offset degrees in all angular regions, the better the mechanical balance of the system, and the stability, structural strength and external force resistance of the platform and equipment will be enhanced accordingly.

[0041] Specifically, the positions of all platform equipment on the upper platform equipment are adjusted several times, the torque offset degrees in all angular regions under each adjustment are obtained, the variance of the torque offset degrees in all angular regions under each adjustment is calculated, and it is denoted as the variance of each placement; then the maximum value of the torque offset degrees in all angular regions under each adjustment is obtained. Select the placement position corresponding to the minimum variance of each placement and the maximum value of the torque offset degrees in all angular regions under each adjustment, and denote it as the optimal placement position. Adjust the position of the platform equipment on the upper platform through the optimal placement position, and conduct the design evaluation of the anti-torsion of the mooring system from step S002 to step S003 through the optimal placement position.

[0042] Step S002: Determine a wind speed for experimental analysis, denoted as the target wind; under the action of the target wind, obtain the change amount of the increase in the overall tension of the floating body.

[0043] It should be noted that when the tension mooring system is affected by the wind, the floating body in the tension mooring system will descend, resulting in an inclined angle between the tension leg and the floating body in the tension mooring system, that is, a torsion will be generated at this time. Therefore, in order to analyze the anti-torsion ability of the mooring system, it is judged by the rotation and descent of the floating body in the tension mooring system.

[0044] Specifically, as Figure 5 shown, determine a wind speed for experimental analysis, denoted as the target wind (that is, under the action of the target wind, conduct the experimental design evaluation of the anti-torsion of the mooring system). Among them, in order to ensure the stability of the mooring system, it is necessary to consider the magnitude of the influence of the wind on the mooring system, which cannot be too large to prevent excessive losses. Therefore, ensure less than 1 meter, less than or equal to ; among them, in this embodiment, ensure that the experimental design evaluation is carried out at the target wind corresponding to meters, when. Among them, in this embodiment, the magnitudes of the target winds corresponding to and are not specifically limited, as long as the above conditions are met, and the implementer can determine according to the specific situation. As Figure 5As shown, after being affected by the target wind, the tension of the tension leg in the tension mooring system increases, and the tension of the tension tendon can be decomposed into horizontal tension and vertical tension. Therefore, the increased tension of the tension tendon can be obtained by analyzing the descent height of the floating body in the tension mooring system.

[0045] According to the relationship between the descent height of the floating body and the increased tension of the tension leg, the following formula can be obtained, and this formula is denoted as the first formula; the first formula is specifically expressed as:

[0046] The increased tension of the tension leg can be obtained through the first formula; specifically expressed as:

[0047] Among them, according to Figure 5 shown, ; In the formula, represents the change in the overall vertical tension of the floating body, represents the density of seawater, represents the acceleration due to gravity, represents the side length of the square of the floating body, represents the descent height of the floating body, represents the angle between the tension of the tension leg and the vertical direction, represents the cosine function, represents the change in the overall increased tension of the floating body, represents the length of the tension leg between the floating body and the anchoring foundation.

[0048] So far, the change in the overall increased tension of the floating body is obtained.

[0049] Step S003: Obtain the torque of the tension mooring system under the action of the target wind; according to the relationship between the change in the overall increased tension of the floating body and the torque of the tension mooring system under the action of the target wind, obtain the optimal structural parameters of the floating body.

[0050] It should be noted that when the tension mooring system is affected by the wind, all platform equipment will be affected by the wind, causing a certain torque in the tension mooring system. When the action of the wind on the tension mooring system is less than a certain proportion of the action of the tension of the tension leg, it indicates that the anti-torsion degree of the mooring system is better.

[0051] Specifically, through the optimal placement positions of all platform equipment, obtain the acting forces on each platform equipment of the upper platform when affected by the target wind; the acting forces on each platform equipment are specifically expressed by the formula:

[0052] In the formula, represents the air density, represents the area of the projection corresponding to the th platform device under the action of the target wind; represents the wind speed of the target wind, represents the th platform device's force exerted by the target wind.

[0053] By the force exerted on the th platform device by the target wind and the distance between the centroid point of each platform device and the central axis, the torque of the tension mooring system under the action of the target wind is obtained; the torque of the tension mooring system under the action of the target wind is specifically expressed by the formula:

[0054] In the formula, represents the force exerted on the th platform device by the target wind; represents the distance between the centroid point of the th platform device and the central axis, represents the total number of all platform devices, represents the torque of the tension mooring system under the action of the target wind.

[0055] Among them, when the force exerted on each platform device by the target wind is greater and the distance between the centroid point of each platform device and the central axis is longer, the torque of the tension mooring system under the action of the target wind is greater; conversely, the torque of the tension mooring system under the action of the target wind is smaller.

[0056] It should be noted that when the force of the wind is exerted, the floating body and the rotation of the floating body are as Figure 4 shown; at this time, a horizontal tensile force will be generated from before the wind action to after the wind action. Therefore, the anti-torsion ability of the mooring system is judged and evaluated by the relationship between the horizontal tensile force and the torque of the tension mooring system under the action of the target wind.

[0057] Specifically, as Figure 4 shown, determine the connection points between all the tendons and the floating body in the tension mooring system, and represent the distance between two adjacent connection points on the same edge of the floating body as , and represent the distance between the floating body and each connection point as .

[0058] By the force of the change in the overall tensile force increase of the floating body in the horizontal direction and the torque of the tension mooring system under the action of the target wind Adjust the floating body parameters according to the relationship between them; the specific process of adjusting the floating body parameters is as follows: Determine the initial and of the floating body. According to the initial and of the floating body, obtain the first characteristic parameter , where the first characteristic parameter ; when the first characteristic parameter , directly output the corresponding to the first characteristic parameter and ; when the first characteristic parameter , add 1 to the initial to obtain , and judge whether and the corresponding meet the conditions; According to and , obtain the second characteristic parameter . When the second characteristic parameter , directly output the corresponding to the second characteristic parameter and ; when the second characteristic parameter , add 2 to the initial to obtain , and judge whether and the corresponding meet the conditions; And so on, until a structural parameter of a characteristic parameter that meets the conditions is output, then stop the iterative loop. Take the structural parameter corresponding to the output characteristic parameter as the optimal structural parameter of the floating body. Among them, and are the structural parameters of the floating body, and .

[0059] The specific iterative process is as shown in the following flow: Step 1: Determine the initial and of the floating body; Step 2: Determine and through ; Step 3: Judge according to ; Step 4: When the judgment condition is met, directly output and , and stop the loop iteration; when the judgment condition is not met, then Increment by 1 and continue the loop iteration from step 2 to step 4.

[0060] Wherein, ; In the formula, represents the horizontal tensile force of the tension leg, represents the angle between the tensile force of the tension tendon and the vertical direction, represents the sine function, represents the change in the overall tensile force increase of the floating body.

[0061] Wherein, represents the preset adjustment coefficient; wherein, in this embodiment, the preset adjustment coefficient , in this embodiment, the preset adjustment coefficient is not specifically limited, and the implementer can determine it according to the specific situation.

[0062] Step S004: Adjust the floating body structure through the optimal structural parameters.

[0063] Adjust the floating body structure through the optimal structural parameters of the floating body to obtain the optimal floating body structure; the optimal floating body structure can maximize the stability and anti-torsion ability of the system.

[0064] As Figure 2 shown, the second aspect of the present invention is to provide a design evaluation system for anti-torsion of a mooring system, including the following modules: Position adjustment module 101: used to divide several angular regions through a preset segmentation angle, obtain the central axis of the upper platform; obtain the projections of the wind blowing towards all platform devices in each angular region, and obtain the moment offset degree of each angular region according to the area of the projections of the wind blowing towards all platform devices in each angular region and the distance between the centroid points of all platform devices and the central axis; determine the optimal placement positions of all platform devices on the upper platform according to the differential distribution of the moment offset degrees of all angular regions; adjust the placement positions of the platform devices on the upper platform through the optimal placement positions, and conduct experimental design evaluation of anti-torsion through the mooring system at the optimal placement positions; Tensile force change analysis module 102: used to determine a wind speed for experimental analysis, denoted as the target wind; obtain the change in the overall tensile force increase of the floating body under the action of the target wind; Parameter optimization module 103: used to obtain the torque of the tension mooring system under the action of the target wind under the action of the target wind; obtain the optimal structural parameters of the floating body according to the relationship between the change in the overall tensile force increase of the floating body and the torque of the tension mooring system under the action of the target wind; Adjustment module 104: used to adjust the floating body structure through the optimal structural parameters of the floating body to obtain the optimal floating body structure.

[0065] The third aspect of the present invention is to provide an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, a design evaluation method for the anti-torsion of a mooring system is implemented.

[0066] The fourth aspect of the present invention is to provide a computer-readable storage medium storing a computer program, which when executed by a processor, implements a design evaluation method for the anti-torsion of a mooring system.

[0067] Those skilled in the art should understand that the embodiments of the present invention may be provided as a method, a system, or a computer program product. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, optical storage, etc.) containing computer-usable program code.

[0068] The present invention is described with reference to the flowcharts and / or block diagrams of methods, systems, and computer program products according to the embodiments of the present invention. It should be understood that each flow and / or block in the flowchart and / or block diagram, and the combination of flows and / or blocks in the flowchart and / or block diagram, can be realized by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, such that the instructions executed by the processor of the computer or other programmable data processing devices generate a device for realizing the functions specified in one Figure 1 flow or multiple flows and / or blocks Figure 1 block or multiple blocks.

[0069] These computer program instructions can also be stored in a computer-readable memory capable of guiding a computer or other programmable data processing device to work in a specific manner, such that the instructions stored in the computer-readable memory generate a manufactured article including an instruction device, and the instruction device realizes the functions specified in one Figure 1 flow or multiple flows and / or blocks Figure 1 block or multiple blocks.

[0070] These computer program instructions can also be loaded onto a computer or other programmable data processing device, such that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process. Thus, the instructions executed on the computer or other programmable device provide steps for realizing the functions specified in one Figure 1 flow or multiple flows and / or blocks Figure 1 block or multiple blocks.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: it is still possible to modify the specific implementation manners of the present invention or make equivalent substitutions, and any modification or equivalent substitution that does not depart from the spirit and scope of the present invention should be covered within the protection scope of the present invention.

Claims

1. A design evaluation method for the anti-torsion of a mooring system, characterized in that Including: Dividing a number of angular regions by a preset division angle, and obtaining the central axis of the upper platform; Obtaining the projections of the wind blowing in each angular region onto all platform devices, and obtaining the torque offset degree of each angular region according to the area of the projections of the wind blowing in each angular region onto all platform devices and the distance between the centroid points of all platform devices and the central axis; determining the optimal placement positions of all platform devices on the upper platform according to the differential distribution of the torque offset degrees of all angular regions; adjusting the placement positions of the platform devices on the upper platform through the optimal placement positions, and conducting an experimental design evaluation of anti-torsion through the mooring system at the optimal placement positions; Determining a wind speed for experimental analysis, denoted as the target wind; obtaining the change amount of the overall tension increase of the floating body under the action of the target wind; Obtaining the torque of the tension mooring system under the action of the target wind under the action of the target wind; obtaining the optimal structural parameters of the floating body according to the relationship between the change amount of the overall tension increase of the floating body and the torque of the tension mooring system under the action of the target wind; Adjusting the floating body structure through the optimal structural parameters of the floating body to obtain the optimal floating body structure.

2. The design evaluation method for anti-torsion of a mooring system according to claim 1, characterized in that, The step of dividing a number of angular regions by a preset division angle and obtaining the central axis of the upper platform includes: Define the due east direction as the starting direction horizontally to the right; with the centroid of the upper platform as the center point, starting from the starting direction, in the counterclockwise direction, with a preset segmentation angle Divide the circumference into several angular regions; Denoting the line passing through the centroid of the upper platform and perpendicular to the upper platform as the central axis.

3. A design evaluation method for anti-torsion of a mooring system according to claim 1, characterized in that, The step of obtaining the torque offset degree of each angular region according to the area of the projections of the wind blowing in each angular region onto all platform devices and the distance between the centroid points of all platform devices and the central axis includes: Obtaining the intermediate angle within the angular range of each angular region as the reference angle of each angular region; wherein, the reference angle of each angular region is equal to the included angle between the wind direction and the horizontal right direction; In the formula, represents the area of the projection corresponding to the reference angle of the th angular region for the th platform device, represents the distance between the centroid point of the th platform device and the central axis; represents the total number of all platform devices, represents the degree of moment offset of the th angular region.

4. A design evaluation method for anti-torsion of a mooring system according to claim 1, characterized in that The step of determining the optimal placement positions of all platform devices on the upper platform according to the differential distribution of the torque offset degrees of all angular regions includes: Performing several placement adjustments on the positions of all platform devices on the upper platform device, obtaining the torque offset degrees of all angular regions under each placement adjustment, calculating the variance of the torque offset degrees of all angular regions under each placement adjustment, denoted as the variance of each placement; and then obtaining the maximum value of the torque offset degrees of all angular regions under each placement adjustment; Selecting the placement position corresponding to the minimum variance of each placement and the minimum maximum value of the torque offset degrees of all angular regions under each placement adjustment as the optimal placement position.

5. A design evaluation method for anti-torsion of a mooring system according to claim 1, characterized in that The step of obtaining the change amount of the overall tension increase of the floating body under the action of the target wind includes: In the formula, represents the density of seawater, represents the acceleration due to gravity, represents the side length of the square of the floating body, represents the height of the floating body's descent, represents the angle between the tension of the tension leg and the vertical direction, represents the cosine function, represents the change in the increase of the overall tension of the floating body, represents the length of the tension leg between the floating body and the anchoring foundation.

6. The design evaluation method for anti-torsion of a mooring system according to claim 1, characterized in that, The step of obtaining the torque of the tension mooring system under the action of the target wind under the action of the target wind includes: Wherein, represents the air density, represents the area of the projection corresponding to the th platform device under the action of the target wind; represents the wind speed of the target wind, represents the force exerted on the th platform device by the target wind; represents the distance between the centroid point of the th platform device and the central axis, represents the total number of all platform devices, represents the torque exerted on the tension mooring system by the target wind.

7. A design evaluation method for anti-torsion of a mooring system according to claim 1, characterized in that, The step of obtaining the optimal structural parameters of the floating body according to the relationship between the change amount of the overall tension increase of the floating body and the torque of the tension mooring system under the action of the target wind includes: Determine the initial and of the floating body. According to the initial and of the floating body, obtain the first characteristic parameter , where the first characteristic parameter ; when the first characteristic parameter , directly output the corresponding to the first characteristic parameter and ; when the first characteristic parameter , add 1 to the initial to obtain , and judge whether and the corresponding meet the conditions; According to and , the second characteristic parameter is obtained. When the second characteristic parameter , the second characteristic parameter corresponding and is directly output; when the second characteristic parameter , the initial is incremented by 2 to obtain , and it is determined whether and the corresponding meet the conditions; And so on, until a structural parameter that meets the conditions of the characteristic parameter is output, then stop the iterative loop; taking the structural parameter corresponding to the output characteristic parameter as the optimal structural parameter of the floating body; Among them, and are structural parameters of the floating body, and ; Among them, ; In the formula, represents the horizontal tensile force of the tension leg, represents the angle between the tensile force of the tension leg and the vertical direction, represents the sine function, represents the change in the overall tensile force increase of the floating body; Among them, represents a preset adjustment coefficient, represents the side length of the square of the floating body, represents the distance between two adjacent connection points on the same edge of the floating body.

8. A design evaluation system for anti-torsion of a mooring system, characterized in that Including: Position adjustment module: used to divide a number of angular regions through a preset splitting angle, and obtain the central axis of the upper platform; Obtain the projections of the wind blowing towards all platform devices in each angular region, and obtain the torque offset degree of each angular region according to the area of the projections of the wind blowing towards all platform devices in each angular region and the distance between the centroid points of all platform devices and the central axis; determine the optimal placement positions of all platform devices on the upper platform according to the differential distribution of the torque offset degrees of all angular regions; adjust the placement positions of the platform devices on the upper platform through the optimal placement positions, and conduct experimental design evaluation of anti-torsion through the mooring system at the optimal placement positions; Tensile force change analysis module: used to determine a wind speed for experimental analysis, denoted as the target wind; obtain the change amount of the overall tensile force increase of the floating body under the action of the target wind; Parameter optimization module: used to obtain the torque of the tension mooring system under the action of the target wind under the action of the target wind; obtain the optimal structural parameters of the floating body according to the relationship between the change amount of the overall tensile force increase of the floating body and the torque of the tension mooring system under the action of the target wind; Adjustment module: used to adjust the floating body structure through the optimal structural parameters of the floating body to obtain the optimal floating body structure.

9. An electronic device, characterized in that, It includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the method for designing and evaluating the anti-torsion of a mooring system according to any one of claims 1-7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, it implements the method for designing and evaluating the anti-torsion of a mooring system according to any one of claims 1-7.

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