Method, system, equipment and medium for estimating initial configuration of multi-segment mooring system

Abstract

The present invention relates to the field of marine engineering technology, and in particular to a method, system, equipment and medium for estimating the initial configuration of a multi-segmented mooring system, comprising: obtaining the design parameters of the multi-segmented mooring system, selecting any mooring line segment as a target segment, dividing the target segment into a non-bottom-lying sub-segment and a completely bottom-lying sub-segment, and establishing and solving a force balance overrun model and an initial configuration constraint model at the connection of the non-bottom-lying sub-segment according to the design parameters of the multi-segmented mooring system, to obtain the horizontal projection length of the multi-segmented mooring system and the height of both ends of the non-bottom-lying mooring line segment; and calculating the initial configuration of the mooring system according to the horizontal projection length of the multi-segmented mooring system and the height of both ends of the non-bottom-lying mooring line segment. The present invention is based on the design parameters of the multi-segmented mooring system, combined with the force balance overrun model and the initial configuration constraint model, to calculate the initial configuration of the mooring system, provide a reference for the design of the mooring system, and greatly reduce the workload.

Description

Technical Field

[0001] The invention relates to the field of marine engineering technology, and in particular to a method, system, equipment and medium for estimating the initial configuration of a multi-segmented mooring system. Background Art

[0002] Vigorously developing clean and renewable energy has become an inevitable trend. Among them, offshore wind power is a new field of renewable energy development and an important direction of wind power development. It has the advantages of large development space and close to the load center. The layout of wind farms has changed from offshore to deep-water coastal areas. When the water depth exceeds 60m, the traditional offshore wind power fixed foundation will face problems such as easy structural instability, large volume and high cost. The floating foundation has advantages in deep sea areas because it does not need to be completely fixed to the seabed. It is the trend of future wind farm construction.

[0003] Floating offshore power generation devices are positioned using mooring systems. During the design phase of the mooring system, it is necessary to calculate the initial configuration of the mooring line, preliminarily evaluate the rationality of the design, and then perform safety checks in accordance with relevant specifications under given environmental loads. However, the traditional method of obtaining the initial configuration of the mooring line has defects such as low efficiency and poor accuracy. Summary of the invention

[0004] The purpose of the present invention is to provide a method, system, device and medium for estimating the initial configuration of a multi-segmented mooring system, so as to realize a fast and high-precision mooring system configuration calculation method, and at the same time help relevant personnel to timely check the rationality of the design parameters of the mooring system.

[0005] In order to solve the above technical problems, the present invention provides a method, system, device and medium for estimating the initial configuration of a multi-segmented mooring system.

[0006] In a first aspect, the present invention provides a method for estimating an initial configuration of a multi-segment mooring system, the method comprising the following steps:

[0007] The design parameters of the multi-segment mooring system are obtained, and each mooring line segment is sorted from the fairlead hole to the anchor point to obtain the original segment sequence;

[0008] Select any mooring line segment in the original segment sequence as the target segment, divide the target segment into a non-bottom-lying sub-segment and a completely bottom-lying sub-segment, and obtain the latest segment sequence;

[0009] Based on the latest segment sequence and the design parameters of the multi-segment mooring system, a force balance overrun model and an initial configuration constraint model are established and solved at the connection of the non-bottom-lying sub-segments to obtain the horizontal projection length of the multi-segment mooring system and the heights of both ends of the non-bottom-lying mooring line segments;

[0010] The initial configuration of the mooring system is calculated based on the horizontal projection length of the multi-segment mooring system and the heights of both ends of the non-bottom-lying mooring line segments.

[0011] In a further embodiment, the multi-segment mooring system design parameters include the length and line density of each mooring line segment, the point buoyancy or point mass at the connection of each mooring line segment, the water depth at the fairlead hole and the anchor point, and the horizontal tension of the mooring line.

[0012] In a further embodiment, the force balance transcendence model is specifically:

[0013]

[0014] Where, T 0 Indicates the horizontal tension of the mooring line; k-1 represents the linear density of the (k-1)th mooring line, Indicates the first segment between the second mooring line segment and the Mth mooring line segment. The segment of the mooring line, M is the position number of the non-bottom-lying sub-segment in the latest segment sequence; represents the horizontal distance from the end point B of the (k-1)th segment of the mooring line to the lowest point O; F represents the horizontal distance from the endpoint A of the kth mooring line to the lowest point O; k It represents the point buoyancy or point mass at the connection point of the kth mooring line segment.

[0015] In a further embodiment, the initial configuration constraint model includes a segment self-length constraint model and a multi-segment mooring system horizontal projection length constraint model; wherein the segment self-length constraint model includes the segment self-length constraints of each mooring line before the non-bottom-lying sub-segment, the non-bottom-lying sub-segment self-length constraints and the target segment self-length constraints;

[0016] The length constraints of each mooring line segment before the non-bottom-lying sub-segment are:

[0017]

[0018] in,

[0019]

[0020]

[0021] Where, L i represents the length of the i-th mooring line segment, i∈[1,M-1], where M is the position number of the non-bottomed sub-segment in the latest segment sequence; λ i represents the line density of the i-th mooring line segment; represents the horizontal distance from the endpoint A to the lowest point O of the i-th mooring line segment; H represents the horizontal distance from the endpoint B to the lowest point O of the i-th mooring line segment; i V represents the horizontal projection length of the i-th mooring line segment; i Indicates the height of the starting point of the i-th mooring line segment; V i+1 Indicates the height of the end of the i-th mooring line segment;

[0022] The length constraint of the non-lying sub-segment itself is:

[0023]

[0024] In the formula, H M represents the horizontal projection length of the non-lying sub-segment M; M V represents the line density of the non-lying sub-segment M; M Indicates the height of the starting end of the non-lying sub-segment M; V M+1 Indicates the height of the end of the non-lying sub-segment M; L M Indicates the length of the non-lying sub-segment M itself;

[0025] The target segment length constraint is:

[0026]

[0027] In the formula, Indicates the length of the target segment before it is divided into sub-segments; L M+1 Indicates the length of the completely lying sub-segment M+1;

[0028] The horizontal projection length constraint model of the multi-segment mooring system is:

[0029]

[0030] In the formula, H 总 H represents the sum of the horizontal projection lengths of all segments in the latest segment sequence; j represents the horizontal projection length of the jth mooring line segment in the latest segment sequence; L M+1 Indicates the length of the completely lying sub-segment M+1; L j represents the length of the jth mooring line segment; N represents the total number of mooring line segments.

[0031] In a further embodiment, the step of calculating the initial configuration of the mooring system according to the horizontal projection length of the multi-segment mooring system and the heights of both ends of the non-bottom-lying mooring line segments comprises:

[0032] Determine whether the lengths of the non-bottom-lying sub-segment and the completely-bottom-lying sub-segment meet the first preset condition, and if so, calculate the initial configuration of the mooring system; otherwise, determine whether the lengths of the non-bottom-lying sub-segment and the completely-bottom-lying sub-segment meet the second preset condition;

[0033] If the lengths of the non-bottom-lying sub-segment and the completely-bottom-lying sub-segment satisfy the second preset condition, then in the original segment sequence, a mooring line segment is moved in the direction from the fairlead hole to the anchor point, and the mooring line segment is used as the target segment;

[0034] If the lengths of the non-lying-bottom sub-segment and the completely-lying-bottom sub-segment do not satisfy the second preset condition, then determining whether the lengths of the non-lying-bottom sub-segment and the completely-lying-bottom sub-segment satisfy the third preset condition;

[0035] If the lengths of the non-bottom-lying sub-segment and the completely bottom-lying sub-segment meet the third preset condition, then a mooring line segment is moved along the anchor point toward the fairlead hole in the original segment sequence, and the mooring line segment is used as the target segment; otherwise, the design parameters of the multi-segment mooring system are judged to be unreasonable.

[0036] In a further embodiment, the first preset condition includes: M ≥0 and L M+1 ≥0;

[0037] The second preset condition includes: M >0 and L M+1 <0, where M≠N 0 ; N 0 Represents the total number of elements in the original segment sequence;

[0038] The third preset condition includes: M <0 and L M+1 >0, where M≠1.

[0039] In a further embodiment, the calculation formula for the initial configuration of the mooring system is:

[0040]

[0041]

[0042] In the formula, (X d ,Z d ) represents the dth segment configuration of the multi-segment mooring system; H δ H represents the horizontal projection length of the δth segment of the mooring line; d represents the horizontal projection length of the dth mooring line segment, where H d =L d , d∈{M+1,…,N}; V dIndicates the height of the starting point of the dth segment of the mooring line. When d = 1, V 1 is the water depth at the fairlead hole; d represents the line density of the dth mooring line segment; Indicates the horizontal distance from the endpoint A of the dth mooring line segment to the lowest point O. In a second aspect, the present invention provides an initial configuration estimation system for a multi-segment mooring system, the system comprising:

[0043] The parameter acquisition module is used to obtain the design parameters of the multi-segment mooring system and sort the segments of each mooring line from the direction from the fairlead hole to the anchor point to obtain the original segment sequence;

[0044] A segmentation module is used to select any mooring line segment in the original segmentation sequence as a target segment, divide the target segment into a non-bottom-lying sub-segment and a completely bottom-lying sub-segment, and obtain the latest segmentation sequence;

[0045] A model building module is used to establish and solve a force balance transcendence model and an initial configuration constraint model at the connection of the non-bottom-lying sub-segments based on the latest segment sequence and the design parameters of the multi-segment mooring system, so as to obtain the horizontal projection length of the multi-segment mooring system and the height of both ends of the non-bottom-lying mooring line segment;

[0046] The configuration calculation module is used to calculate the initial configuration of the mooring system according to the horizontal projection length of the multi-segment mooring system and the heights of both ends of the non-bottom-lying mooring line segments.

[0047] In a third aspect, the present invention further provides a computer device, comprising a processor and a memory, wherein the processor is connected to the memory, the memory is used to store a computer program, and the processor is used to execute the computer program stored in the memory so that the computer device performs the steps of implementing the above method.

[0048] In a fourth aspect, the present invention further provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and the computer program implements the steps of the above method when executed by a processor.

[0049] The present invention provides a method, system, device and medium for estimating the initial configuration of a multi-segmented mooring system. The method divides the mooring line segments with no bottom lying and completely bottom lying into segments, applies the catenary method in each mooring line segment, establishes force balance conditions at the segment connection, and considers the constraint conditions to obtain a force balance transcendence model and an initial configuration constraint model, and solves the unknown quantities such as the projection length and vertical height of each mooring line segment, and uses the catenary method to obtain the initial configuration of each segment. Compared with the prior art, this method does not require nonlinear iterative solution of the stiffness matrix, has the advantages of simple calculation and fast speed, etc., and can provide an initial configuration for the hydrodynamic calculation of the mooring system and verify the rationality of the mooring system design. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 It is a schematic flow chart of a method for estimating an initial configuration of a multi-segmented mooring system provided by an embodiment of the present invention;

[0051] Figure 2 It is a schematic diagram of the initial configuration calculation process of the multi-segment mooring system provided by an embodiment of the present invention;

[0052] Figure 3 is a schematic diagram of a multi-segment mooring system provided by an embodiment of the present invention;

[0053] Figure 4 is a schematic diagram of the initial configuration result calculated in Example 1 provided in an embodiment of the present invention;

[0054] Figure 5 is a schematic diagram of the initial configuration result calculated in Example 2 provided in an embodiment of the present invention;

[0055] Figure 6 is a block diagram of an initial configuration estimation system for a multi-segmented mooring system provided by an embodiment of the present invention;

[0056] Figure 7 It is a schematic diagram of the structure of a computer device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0057] The following specifically illustrates the implementation mode of the present invention in conjunction with the accompanying drawings. The embodiments are provided for illustrative purposes only and cannot be understood as limiting the present invention. The accompanying drawings are provided for reference and illustration only and do not constitute a limitation on the scope of patent protection of the present invention, because many changes can be made to the present invention without departing from the spirit and scope of the present invention.

[0058] refer to Figure 1 The embodiment of the present invention provides a method for estimating the initial configuration of a multi-segment mooring system, which can be applied to all mooring systems composed of anchor chains, steel cables, fiber cables and other materials alone or in combination, such as Figure 1 As shown, the method comprises the following steps:

[0059] S1. Obtain the design parameters of the multi-segment mooring system, and sort the segments of each mooring line from the direction from the fairlead hole to the anchor point to obtain the original segment sequence.

[0060] In this embodiment, the design parameters of the multi-segment mooring system include the length and line density of each mooring line segment, the point buoyancy or point mass at the connection of each mooring line segment, the water depth at the fairlead hole and the anchor point, and the horizontal tension of the mooring line.

[0061] S2. Select any mooring line segment in the original segment sequence as the target segment, divide the target segment into a non-bottom-lying sub-segment and a completely bottom-lying sub-segment, and obtain the latest segment sequence.

[0062] Specifically, this embodiment pre-sets a multi-segment mooring system with a total of N 0 The mooring line segments are segmented, and the mooring line segments are sorted in the direction from the fairlead hole to the anchor point to obtain the original segment sequence, wherein all the segments between the fairlead hole and the non-lying bottom sub-segment (including the non-lying bottom sub-segment) are non-lying bottom mooring line segments; then the mooring line segment at the M position in the original segment sequence is selected and used as the target segment, and the target segment is divided into two sub-segments, namely the non-lying bottom sub-segment and the completely lying bottom sub-segment, and the target segment in the original segment sequence is replaced with the non-lying bottom sub-segment and the completely lying bottom sub-segment to obtain the latest segment sequence. At this time, the number of elements in the latest segment sequence is N, wherein N=N 0 +1, the non-lying sub-segment is located at the Mth position in the latest segment sequence, and the completely lying sub-segment is located at the (M+1)th position in the latest segment sequence.

[0063] S3. Based on the latest segment sequence and according to the design parameters of the multi-segment mooring system, a force balance exceedance model and an initial configuration constraint model are established and solved at the connection of the non-bottom-lying sub-segments to obtain the horizontal projection length of the multi-segment mooring system and the heights of both ends of the non-bottom-lying mooring line segments.

[0064] In one embodiment, the force balance transcendence model is specifically:

[0065]

[0066] Where, T 0 Indicates the horizontal tension of the mooring line; k-1 represents the linear density of the (k-1)th mooring line, Indicates the first segment between the second segment and the Mth segment in the latest segment sequence. The segment of the mooring line, M is the position number of the non-bottom-lying sub-segment in the latest segment sequence; represents the horizontal distance from the end point B of the (k-1)th segment of the mooring line to the lowest point O; F represents the horizontal distance from the endpoint A of the kth mooring line to the lowest point O; k It represents the point buoyancy or point mass at the connection point of the kth mooring line segment, and its value can be zero.

[0067] In one embodiment, the initial configuration constraint model includes a segment length constraint model and a multi-segment mooring system horizontal projection length constraint model.

[0068] The segment length constraint model includes the length constraints of each mooring line segment before the target segment, the length constraints of the non-bottom-lying sub-segment, and the length constraints of the target segment. In this embodiment, the length constraints of each mooring line segment before the non-bottom-lying sub-segment (the 1st to the M-1st mooring line segments) in the latest segment sequence are:

[0069]

[0070] in,

[0071]

[0072]

[0073] Where, L i represents the length of the i-th mooring line segment, i∈[1,M-1], where M is the position number of the non-bottomed sub-segment in the latest segment sequence; λ i represents the linear density (wet weight) of the i-th mooring line segment; represents the horizontal distance from the endpoint A to the lowest point O of the i-th mooring line segment; H represents the horizontal distance from the endpoint B to the lowest point O of the i-th mooring line segment; i V represents the horizontal projection length of the i-th mooring line segment; i Indicates the height of the starting point of the i-th mooring line segment; V i+1 Indicates the height of the end of the i-th mooring line segment;

[0074] The length constraint of the non-lying sub-segment itself is:

[0075]

[0076] In the formula, H M represents the horizontal projection length of the non-lying sub-segment M; M V represents the line density of the non-lying sub-segment M; M Indicates the height of the starting end of the non-lying sub-segment M; V M+1Indicates the height of the end of the non-lying sub-segment M (the height of the starting end of the completely lying sub-segment); L M Indicates the length of the non-lying sub-segment M itself;

[0077] The target segment length constraint is:

[0078]

[0079] In the formula, Indicates the length of the target segment before it is divided into sub-segments; L M+1 Indicates the length of the completely lying sub-segment M+1;

[0080] The horizontal projection length constraint model of the multi-segment mooring system is:

[0081]

[0082] In the formula, H 总 It represents the sum of the horizontal projection lengths of all segments in the latest segment sequence, which is determined according to the mooring radius; H j represents the horizontal projection length of the jth mooring line segment in the latest segment sequence; L M+1 Indicates the length of the completely lying sub-segment M+1; L j represents the length of the jth mooring line segment; N represents the total number of mooring line segments.

[0083] This embodiment uses the fsolve function in MATLAB software to solve and obtain the length of the Mth segment, the length of the M+1th segment, the horizontal projection length of the multi-segment mooring system, and the heights of both ends of the non-bottom-lying mooring line segment.

[0084] S4. Calculate the initial configuration of the mooring system according to the horizontal projection length of the multi-segment mooring system and the heights of both ends of the non-bottom-lying mooring line segments.

[0085] In one embodiment, Figure 2 As shown, the step of calculating the initial configuration of the mooring system according to the horizontal projection length of the multi-segment mooring system and the heights of both ends of the non-bottom-lying mooring line segments comprises:

[0086] Determine whether the lengths of the non-bottom-lying sub-segment and the completely-bottom-lying sub-segment meet the first preset condition, and if so, calculate the initial configuration of the mooring system; otherwise, determine whether the lengths of the non-bottom-lying sub-segment and the completely-bottom-lying sub-segment meet the second preset condition;

[0087] If the lengths of the non-bottom-lying sub-segment and the completely-bottom-lying sub-segment satisfy the second preset condition, then in the original segment sequence, one mooring line segment is moved in the direction from the fairlead hole to the anchor point, and the mooring line segment is used as the target segment to re-divide the non-bottom-lying sub-segment and the completely-bottom-lying sub-segment;

[0088] If the lengths of the non-lying bottom sub-segment and the completely lying bottom sub-segment do not meet the second preset condition, then determine whether the lengths of the non-lying bottom sub-segment and the completely lying bottom sub-segment meet the third preset condition. If so, move a mooring line segment along the anchor point toward the fairlead hole in the original segment sequence, and use the mooring line segment as the target segment to re-divide the non-lying bottom sub-segment and the completely lying bottom sub-segment; otherwise, determine that the design parameters of the multi-segment mooring system are unreasonable.

[0089] Wherein, the first preset condition includes: M ≥0 and L M+1 ≥0,L M Indicates the length of the non-lying sub-segment itself, L M+1 represents the length of the sub-segment lying completely on the bottom; the second preset condition includes: L M >0 and L M+1 <0, where M≠N 0 ; N 0 represents the total number of elements of the original segment sequence; the third preset condition includes: L M <0 and L M+1 >0, where M≠1.

[0090] Specifically, Figure 2 As shown, when it is judged that L M ≥0 and L M+1 ≥0, the solution is completed and the initial configuration of the mooring system is calculated; when it is judged that L M >0 and L M+1 <0, and M≠N 0 When L is determined, a mooring line segment is moved along the fairlead hole toward the anchor point in the original segment sequence, and the mooring line segment is used as the target segment to re-divide the non-bottom-lying sub-segment and the completely bottom-lying sub-segment. M <0 and L M+1 >0, and M≠1, move a mooring line segment along the direction of the anchor point toward the fairlead hole in the original segment sequence, and use the mooring line segment as the target segment to re-divide the non-bottom-lying sub-segments and the completely bottom-lying sub-segments; if these conditions are not met, the design parameters of the multi-segment mooring system are considered unreasonable and the calculation is terminated; Figure 3 Schematic diagram of a multi-segment mooring system.

[0091] In one embodiment, the calculation formula for the initial configuration of the mooring system is:

[0092]

[0093]

[0094] In the formula, (X d ,Z d ) represents the dth segment configuration of the multi-segment mooring system; H δ H represents the horizontal projection length of the δth segment of the mooring line; d represents the horizontal projection length of the dth mooring line segment, where H d =L d , d∈{M+1,…,N}; V d Indicates the height of the starting point of the dth segment of the mooring line. When d = 1, V 1 is the water depth at the fairlead hole; d represents the line density of the dth mooring line segment; It represents the horizontal distance from the endpoint A to the lowest point O of the dth mooring line segment.

[0095] For ease of understanding, the method for estimating the initial configuration of a multi-segment mooring system provided in this embodiment will be further described below with two examples:

[0096] Example 1:

[0097] The design parameters of the multi-segment mooring system are shown in Table 1. The original segment sequence has a total of N 0 = 8 sections, water depth V at the fairlead hole 1 is -10m, the water depth at the anchor point is -40m, the total length of the horizontal projection of the mooring line is 600m, and the horizontal tension of the mooring line is T 0 is 600kN, Table 1 is as follows:

[0098] Table 1

[0099]

[0100] When segment 6 in the original segment sequence is used as the target segment, we can obtain L M =99.6347m and L M+1 = -59.6347m. According to the above algorithm, one mooring line segment should be moved along the chock toward the anchor point in the original segment sequence, that is, segment 7 should be used as the target segment again.

[0101] When segment 8 in the original segment sequence is used as the target segment, we can solve for L M =-55.7334m and L M+1 =210.7334m. According to the above algorithm, one mooring line segment should be moved along the direction from the anchor point to the fairlead hole in the original segment sequence, that is, segment 7 should be used as the target segment again.

[0102] When segment 7 in the original segment sequence is used as the target segment, we can solve for L M =13.6886m and L M+1 =11.3114m, the calculated initial configuration is as follows Figure 4 As shown, according to the calculation method proposed in this embodiment, segment 7 is divided into two sub-segments, the first sub-segment has no bottom-lying portion, and the second sub-segment is completely bottom-lying.

[0103] Example 2: Adjust the point buoyancy at the right end of segment 5 in Example 1 by 60 kN, and keep other design parameters unchanged.

[0104] When segment 7 in the original segment sequence is used as the target segment, we can solve for L M =-3.3408m and L M+1 =28.3408m. According to the above algorithm, one mooring line segment should be moved along the direction of the anchor point toward the fairlead hole in the original segment sequence, that is, segment 6 should be used as the target segment again.

[0105] When segment 6 in the original segment sequence is used as the target segment, we can obtain L M =23.8692m and L M+1 =16.1308m, the calculated initial configuration is as follows Figure 5 As shown, according to the calculation method proposed in this embodiment, segment 6 is divided into two sub-segments, the first sub-segment has no bottom-lying portion, and the second sub-segment is completely bottom-lying.

[0106] This embodiment provides a method for estimating the initial configuration of a multi-segment mooring system, which subdivides the segments with no bottom lying and completely bottom lying, applies the catenary method in each segment, establishes force balance conditions at the segment connection, and sets constraints to obtain a force balance transcendence model and an initial configuration constraint model, solves unknown quantities such as the bottom lying segment position, the projection length of each segment, and the vertical height, and applies the catenary method to give the initial configuration of each segment. The method provided by the present invention is not only used to calculate the initial configuration of the mooring system, provide a reference for the design of the mooring system, reduce the workload, and improve the efficiency of the mooring system scheme design, but also can verify the rationality of the design parameters of the multi-segment mooring system, and can be widely used in the field of deepwater marine engineering.

[0107] It should be noted that the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0108] In one embodiment, Figure 6As shown, an embodiment of the present invention provides an initial configuration estimation system for a multi-segment mooring system, the system comprising:

[0109] The parameter acquisition module 101 is used to acquire the design parameters of the multi-segment mooring system and sort the segments of each mooring line in the direction from the fairlead hole to the anchor point to obtain an original segment sequence;

[0110] The segmentation module 102 is used to select any mooring line segment in the original segmentation sequence as a target segment, divide the target segment into a non-bottom-lying sub-segment and a completely bottom-lying sub-segment, and obtain the latest segmentation sequence;

[0111] The model building module 103 is used to build and solve the force balance transcendence model and the initial configuration constraint model at the connection of the non-bottom-lying sub-segments based on the latest segment sequence and the design parameters of the multi-segment mooring system, so as to obtain the horizontal projection length of the multi-segment mooring system and the height of both ends of the non-bottom-lying mooring line segment;

[0112] The configuration calculation module 104 is used to calculate the initial configuration of the mooring system according to the horizontal projection length of the multi-segment mooring system and the heights of both ends of the non-bottom-lying mooring line segments.

[0113] For the specific definition of a multi-segmented mooring system initial configuration estimation system, please refer to the above-mentioned definition of a multi-segmented mooring system initial configuration estimation method, which will not be repeated here. A person of ordinary skill in the art will appreciate that the various modules and steps described in conjunction with the embodiments disclosed in this application can be implemented in hardware, software, or a combination of both. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0114] The embodiment of the present invention provides an initial configuration estimation system for a multi-segmented mooring system. The parameter acquisition module and the segmentation module divide the mooring line segments with no bottom lying and completely bottom lying into two sub-segments, wherein the first sub-segment has no bottom lying part, the second sub-segment is all bottom lying part, and all segments between the first sub-segment and the fairlead hole have no bottom lying part; the model establishment module establishes a force balance transcendence model and an initial configuration constraint model according to the vertical force balance conditions at the connection of the non-bottom lying segment and the self-length and horizontal projection length constraints of the segment; the configuration calculation module calculates the initial configuration of the mooring system according to the horizontal projection length of each segment, the height of both ends of the non-bottom lying mooring line segment and the horizontal tension. Compared with the prior art, the system provided by the present application can obtain the initial configuration of the multi-segmented mooring system without complex calculations, and can also verify the rationality of the design parameters of the multi-segmented mooring system, providing a basis for adjusting the design parameters.

[0115] Figure 7 A computer device provided by an embodiment of the present invention includes a memory, a processor and a transceiver, which are connected via a bus; the memory is used to store a set of computer program instructions and data, and can transmit the stored data to the processor, and the processor can execute the program instructions stored in the memory to perform the steps of the above method.

[0116] The memory may include a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories; the processor may be a central processing unit, a microprocessor, an application-specific integrated circuit, a programmable logic device, or a combination thereof. By way of example but not limitation, the programmable logic device may be a complex programmable logic device, a field programmable gate array, a general purpose array logic, or any combination thereof.

[0117] Additionally, the memory may be a physically separate unit or may be integrated with the processor.

[0118] It can be understood by those skilled in the art that Figure 7 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have the same component arrangement.

[0119] In one embodiment, the present invention provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the steps of the above method are implemented.

[0120] An embodiment of the present invention provides a method, system, device and medium for estimating the initial configuration of a multi-segmented mooring system. The method for estimating the initial configuration of a multi-segmented mooring system comprehensively considers the mooring system composed of materials such as anchor chains, steel cables, fiber cables, etc. alone or in combination, while considering point buoyancy (buoy) and point mass (connecting triangle plates, counterweights). The calculation method is simple and does not require nonlinear iterative solution of the stiffness matrix. It has the advantages of simple calculation method, fast speed, high accuracy, etc.

[0121] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented by software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present invention is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrated. The available medium can be a magnetic medium (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., an SSD), etc.

[0122] Those skilled in the art will appreciate that all or part of the processes in the above-mentioned embodiment methods can be implemented by instructing related hardware through a computer program. The computer program can be stored in a computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods.

[0123] The above-mentioned embodiments only express several preferred implementation modes of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in the technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be regarded as the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be based on the protection scope of the claims.

Claims

1. A method for estimating the initial configuration of a multi-segment mooring system. It is characterized in that The following steps are involved: The design parameters of the multi-segment mooring system are obtained, and each mooring line segment is sorted from the fairlead hole to the anchor point to obtain the original segment sequence; Select any mooring line segment in the original segment sequence as the target segment, divide the target segment into a non-bottom-lying sub-segment and a completely bottom-lying sub-segment, and obtain the latest segment sequence; Based on the latest segment sequence and the design parameters of the multi-segment mooring system, a force balance overrun model and an initial configuration constraint model are established and solved at the connection of the non-bottom-lying sub-segments to obtain the horizontal projection length of the multi-segment mooring system and the heights of both ends of the non-bottom-lying mooring line segments; The initial configuration of the mooring system is calculated based on the horizontal projection length of the multi-segment mooring system and the heights of both ends of the non-bottom-lying mooring line segments; Wherein, the force balance transcendence model is specifically: In the formula, Indicates the horizontal tension of the mooring line; represents the linear density of the (k-1)th mooring line, , Indicates the first segment between the second mooring line segment and the Mth mooring line segment. The segment of the mooring line, M is the position number of the non-bottom-lying sub-segment in the latest segment sequence; represents the horizontal distance from the end point B of the (k-1)th segment of the mooring line to the lowest point O; It represents the horizontal distance from the endpoint A of the kth mooring line to the lowest point O; represents the point buoyancy or point mass at the connection point of the kth mooring line segment; The step of calculating the initial configuration of the mooring system according to the horizontal projection length of the multi-segment mooring system and the heights of both ends of the non-bottom-lying mooring line segments comprises: Determine whether the lengths of the non-bottom-lying sub-segment and the completely-bottom-lying sub-segment meet the first preset condition, and if so, calculate the initial configuration of the mooring system; otherwise, determine whether the lengths of the non-bottom-lying sub-segment and the completely-bottom-lying sub-segment meet the second preset condition; If the lengths of the non-bottom-lying sub-segment and the completely-bottom-lying sub-segment satisfy the second preset condition, then in the original segment sequence, a mooring line segment is moved in the direction from the fairlead hole to the anchor point, and the mooring line segment is used as the target segment; If the lengths of the non-lying-bottom sub-segment and the completely-lying-bottom sub-segment do not satisfy the second preset condition, then determining whether the lengths of the non-lying-bottom sub-segment and the completely-lying-bottom sub-segment satisfy the third preset condition; If the lengths of the non-bottom-lying sub-segment and the completely bottom-lying sub-segment meet the third preset condition, then a mooring line segment is moved along the anchor point toward the fairlead hole in the original segment sequence, and the mooring line segment is used as the target segment; otherwise, the design parameters of the multi-segment mooring system are judged to be unreasonable.

2. A method for estimating an initial configuration of a multi-segment mooring system as claimed in claim 1, Features: The design parameters of the multi-segment mooring system include the length and line density of each mooring line segment, the point buoyancy or point mass at the connection of each mooring line segment, the water depth at the fairlead hole and the anchor point, and the horizontal tension of the mooring line.

3. A method for estimating an initial configuration of a multi-segment mooring system as claimed in claim 1, Features: The initial configuration constraint model includes a segment self-length constraint model and a multi-segment mooring system horizontal projection length constraint model; wherein the segment self-length constraint model includes the segment self-length constraint conditions of each mooring line segment before the non-bottom-lying sub-segment, the non-bottom-lying sub-segment self-length constraint conditions and the target segment self-length constraint conditions; The length constraints of each mooring line segment before the non-bottom-lying sub-segment are: in, In the formula, represents the length of the i-th mooring line segment itself, , where M is the position number of the non-bottom sub-segment in the latest segment sequence; represents the line density of the i-th mooring line segment; represents the horizontal distance from the endpoint A to the lowest point O of the i-th mooring line segment; represents the horizontal distance from the endpoint B to the lowest point O of the i-th mooring line segment; represents the horizontal projection length of the i-th mooring line segment; Indicates the height of the starting point of the i-th mooring line segment; Indicates the height of the end of the i-th mooring line segment; The length constraint of the non-lying sub-segment itself is: In the formula, represents the horizontal projection length of the non-lying sub-segment M; represents the line density of the non-lying sub-segment M; Indicates the height of the starting end of the non-lying sub-segment M; Indicates the height of the end of the non-lying sub-segment M; Indicates the length of the non-lying sub-segment M itself; The target segment length constraint is: In the formula, Indicates the length of the target segment before it is divided into sub-segments; Indicates the length of the completely lying sub-segment M+1; The horizontal projection length constraint model of the multi-segment mooring system is: In the formula, represents the sum of the horizontal projection lengths of all segments in the latest segment sequence; represents the horizontal projection length of the jth mooring line segment in the latest segment sequence; Indicates the length of the completely lying sub-segment M+1; represents the length of the jth mooring line segment; N represents the total number of mooring line segments.

4. A method for estimating the initial configuration of a multi-segment mooring system as claimed in claim 3, Features: The first preset condition includes: and ; The second preset condition includes: and ,in, ; Represents the total number of elements in the original segment sequence; The third preset condition includes: and ,in, ; In the formula, Indicates the length of the non-lying sub-segment itself; Indicates the length of the completely lying sub-segment (M+1).

5. A method for estimating the initial configuration of a multi-segment mooring system as claimed in claim 3, It is characterized in that The calculation formula for the initial configuration of the mooring system is: In the formula, represents the dth segment configuration of the multi-segment mooring system; Indicates The horizontal projection length of the segmented mooring line; represents the horizontal projection length of the dth mooring line segment, where , ; N represents the total number of mooring line segments; Indicates the height of the starting point of the dth segment of the mooring line. When d=1, is the water depth at the fairlead hole; represents the line density of the dth mooring line segment; It represents the horizontal distance from the endpoint A to the lowest point O of the dth mooring line segment.

6. An initial configuration estimation system for a multi-segment mooring system, It is characterized in that The system comprises: The parameter acquisition module is used to obtain the design parameters of the multi-segment mooring system and sort the segments of each mooring line from the direction from the fairlead hole to the anchor point to obtain the original segment sequence; A segmentation module is used to select any mooring line segment in the original segmentation sequence as a target segment, divide the target segment into a non-bottom-lying sub-segment and a completely bottom-lying sub-segment, and obtain the latest segmentation sequence; A model building module is used to establish and solve a force balance transcendence model and an initial configuration constraint model at the connection of the non-bottom-lying sub-segments based on the latest segment sequence and the design parameters of the multi-segment mooring system, so as to obtain the horizontal projection length of the multi-segment mooring system and the height of both ends of the non-bottom-lying mooring line segment; A configuration calculation module, used for calculating the initial configuration of the mooring system according to the horizontal projection length of the multi-segment mooring system and the heights of both ends of the non-bottom-lying mooring line segments; Wherein, the force balance transcendence model is specifically: In the formula, Indicates the horizontal tension of the mooring line; represents the linear density of the (k-1)th mooring line, , Indicates the first segment between the second mooring line segment and the Mth mooring line segment. The segment of the mooring line, M is the position number of the non-bottom-lying sub-segment in the latest segment sequence; represents the horizontal distance from the end point B of the (k-1)th segment of the mooring line to the lowest point O; It represents the horizontal distance from the endpoint A of the kth mooring line to the lowest point O; represents the point buoyancy or point mass at the connection point of the kth mooring line segment; The step of calculating the initial configuration of the mooring system according to the horizontal projection length of the multi-segment mooring system and the heights of both ends of the non-bottom-lying mooring line segments comprises: Determine whether the lengths of the non-bottom-lying sub-segment and the completely-bottom-lying sub-segment meet the first preset condition, and if so, calculate the initial configuration of the mooring system; otherwise, determine whether the lengths of the non-bottom-lying sub-segment and the completely-bottom-lying sub-segment meet the second preset condition; If the lengths of the non-bottom-lying sub-segment and the completely-bottom-lying sub-segment satisfy the second preset condition, then in the original segment sequence, a mooring line segment is moved in the direction from the fairlead hole to the anchor point, and the mooring line segment is used as the target segment; If the lengths of the non-lying-bottom sub-segment and the completely-lying-bottom sub-segment do not satisfy the second preset condition, then determining whether the lengths of the non-lying-bottom sub-segment and the completely-lying-bottom sub-segment satisfy the third preset condition; If the lengths of the non-bottom-lying sub-segment and the completely bottom-lying sub-segment meet the third preset condition, then a mooring line segment is moved along the anchor point toward the fairlead hole in the original segment sequence, and the mooring line segment is used as the target segment; otherwise, the design parameters of the multi-segment mooring system are judged to be unreasonable.

7. A computer device, Features: The computer device comprises a processor and a memory, wherein the processor is connected to the memory, the memory is used to store a computer program, and the processor is used to execute the computer program stored in the memory, so that the computer device executes the method according to any one of claims 1 to 5.

8. A computer-readable storage medium, Features: The computer-readable storage medium stores a computer program, and when the computer program is executed, the method according to any one of claims 1 to 5 is implemented.

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