Method and device for determining ship operation standard

Abstract

The invention provides a ship operation standard determination method and device, and belongs to the technical field of coast engineering, and the method comprises the steps: obtaining a wave period, an operation wave height and a ship draft; based on the wave period, the operation wave height and the ship draft, the ship rotation motion amount and the ship translation motion amount are determined; and determining a ship operation standard based on the ship rotation motion amount and the ship translation motion amount. The method comprises the following steps: determining a ship rotation motion amount and a ship translation motion amount based on a wave period, an operation wave height and a ship draft depth; and the ship operation standard is determined based on the ship rotation motion amount and the ship translation motion amount, so that the technical problem that the ship operation standard cannot be determined accurately based on wave-related factors temporarily in the existing technical scheme is solved.

Description

Technical Field

[0001] The invention relates to the technical field of coastal engineering, and in particular to a method and a device for determining a ship operation standard. Background Art

[0002] The amount of motion of a ship during its movement is affected by wave factors, which in turn affects the ship's operating standards. However, there is still a lack of relevant research results on which wave factors affect the ship's operating standards, that is, the existing technical solutions cannot accurately determine the ship's operating standards based on wave-related factors. Summary of the invention

[0003] In view of this, it is necessary to provide a method and device for determining ship operation standards to solve the technical problem that the existing technical solutions are temporarily unable to accurately determine ship operation standards based on wave-related factors.

[0004] In order to solve the above problems, on the one hand, the present invention provides a method for determining a ship operation standard, comprising: Obtain wave period, operating wave height and ship draft; Determine the ship's rotational motion and translational motion based on the wave period, operating wave height and ship draft; The ship operation standard is determined based on the ship's rotational motion and translational motion.

[0005] In a possible implementation, the wave period includes: an average wave period and a natural wave period; Determine the ship's rotational motion based on the wave period, operating wave height and ship draft, including: The rotational motion of the ship is determined based on the average wave period, the natural wave period, the operating wave height, the ship draft, the wave steepness and the ship size.

[0006] In a possible implementation, in the case of beam waves, the ship dimension is the ship width; in the case of following waves, the ship dimension is the length between the ship columns.

[0007] In a possible implementation, the calculation formula of the rotational motion of the ship is:

[0008] in, Indicates the rotational motion of the ship, Indicates the preset comprehensive coefficient, T represents the average period of the wave, TN represents the natural period of the wave, H Indicates the operation wave height, D0 means the ship's draft, λ Indicates steep waves. a, b, c, d Both represent coefficients determined through experiments.

[0009] In a possible implementation, the calculation formula of the ship's translational motion is:

[0010] in, S Indicates the translational motion of the ship.

[0011] In a possible implementation, determining the ship operation standard based on the rotational motion amount and the translational motion amount of the ship includes: Determine the ship's rotation, roll and pitch based on the ship's rotational motion; Determine the heave, lateral and longitudinal displacement of the ship based on the translational motion of the ship; Determine the ship's operating standards based on the ship's turning, rolling and pitching, as well as the ship's heaving, lateral movement and longitudinal movement.

[0012] In a possible implementation, the method for determining the ship operation standard further includes: The operating wave height is determined based on the wave period, wave type and ship load.

[0013] In a possible implementation, determining the operating wave height based on the wave period, wave type and ship load includes: Determine the initial operating wave height based on wave period, wave type and ship load; When the ship is an oil tanker or an LNG ship, and the initial operating wave height is greater than or equal to a preset first wave height threshold, the final operating wave height is determined to be the first wave height threshold.

[0014] In a possible implementation, determining the operating wave height based on the wave period, wave type and ship load also includes: When the ship is a bulk carrier or a barge, and the initial operating wave height is greater than the preset second wave height threshold, determining the final operating wave height to be the second wave height threshold; Among them, the sizes of the second wave height thresholds corresponding to different ship loads are different, and the sizes of the second wave height thresholds corresponding to different wave periods are different.

[0015] On the other hand, the present invention also provides a device for determining a ship operation standard, comprising: An acquisition module is used to obtain wave period, operating wave height and ship draft; A motion calculation module is used to determine the rotational motion and translational motion of the ship based on the wave period, operating wave height and draft of the ship; The standard determination module is used to determine the ship operation standard based on the rotational motion amount and the translational motion amount of the ship.

[0016] The beneficial effects of adopting the above-mentioned implementation method are as follows: the method and device for determining the ship operation standard provided by the present invention, the present invention determines through ship tests that the motion characteristics of various ships under the action of waves are affected by the wave period, operating wave height and ship draft, which in turn affects the ship's rotational motion, thereby affecting the ship's operation standard. Therefore, the present invention determines the ship's rotational motion and the ship's translational motion based on the wave period, operating wave height and ship draft; determines the ship's operation standard based on the ship's rotational motion and the ship's translational motion, thereby solving the technical problem that the existing technical solutions are temporarily unable to accurately determine the ship's operation standard based on wave-related factors. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 A flow chart of an embodiment of a method for determining ship operation standards provided by the present invention; Figure 2 A principle block diagram of an embodiment of a device for determining ship operation standards provided by the present invention; Figure 3 A schematic structural diagram of an embodiment of an electronic device provided by the present invention. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0020] In the description of the embodiments of the present application, unless otherwise specified, “plurality” means two or more.

[0021] The terms "including" and "having" and any variations thereof in the embodiments of the present invention are intended to cover non-exclusive inclusions. For example, a process, method, apparatus, product or equipment comprising a series of steps or modules is not necessarily limited to those steps or modules clearly listed, but may include other steps or modules not clearly listed or inherent to these processes, methods, products or equipment.

[0022] The naming or numbering of the steps in the embodiments of the present invention does not mean that the steps in the method flow must be executed in the time / logical sequence indicated by the naming or numbering. The execution order of the named or numbered process steps can be changed according to the technical purpose to be achieved, as long as the same or similar technical effects can be achieved.

[0023] Reference to an "embodiment" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0024] The present invention provides a method and device for determining ship operation standards, which are described below respectively.

[0025] like Figure 1 As shown, the present invention provides a method for determining a ship operation standard, comprising: S101, obtaining wave period, operating wave height and ship draft; S102, determining the rotational motion amount and the translational motion amount of the ship based on the wave period, the operating wave height and the draft depth of the ship; S103: Determine the ship operation standard based on the rotational motion amount and the translational motion amount of the ship.

[0026] It can be understood that the ship operation standard provided by the present invention is an operation standard based on the ship movement expressed in terms of wave height and period.

[0027] First of all, according to the regulations, the lateral movement of the ship takes the maximum amplitude value in a single direction, and the other movement quantities take the sum of the maximum amplitude values ​​in two directions.

[0028] Based on the analysis of the six degrees of freedom of the moored ship, it can be seen that the movement of the ship is affected by the wave period, wave height, water depth (design water level), and load (which can be reflected as draft depth). In order to obtain a calculation formula suitable for practical application, a dimensionless form is used to analyze each influencing factor, and the nonlinear relationship between the movement and each parameter is considered.

[0029] In the past, most empirical formulas mostly treated the periodic power exponent corresponding to the ship's motion as a constant. However, the wave period range in the present invention is relatively large. Due to the relationship between the ship's motion and the wave period, treating the power exponent as a constant cannot accurately reflect the resonance phenomenon of the ship's motion. Therefore, it is considered to add a wavelength parameter related to the wave period, and consider the influence of the wavelength relative to the length between the ship columns or the ship's width on the motion of the moored ship.

[0030] The motion characteristics of various ships under the action of waves are comprehensively considered, and the period is considered to be relative to the natural period of the ship, the wave height is relative to the draft of the ship, and the wavelength is relative to the length between the ship columns or the width of the ship. At the same time, the influence of the wave steepness on the motion of the moored ship is considered. Since the influence of wave steepness on the rotation, roll and pitch motion is more obvious, the three rotation variables of rotation, roll and pitch focus on the effect of wave steepness, so as to determine rotation, roll and pitch.

[0031] In some embodiments, the wave period includes: an average wave period and a natural wave period; Determine the ship's rotational motion based on the wave period, operating wave height and ship draft, including: The rotational motion of the ship is determined based on the average wave period, the natural wave period, the operating wave height, the ship draft, the wave steepness and the ship size.

[0032] In some embodiments, in the case of beam waves, the ship dimension is the ship width; in the case of following waves, the ship dimension is the ship column length.

[0033] In some embodiments, the calculation formula for the rotational motion of the ship is:

[0034] in, Indicates the rotational motion of the ship, Indicates the preset comprehensive coefficient, T represents the average period of the wave, TN represents the natural period of the wave, H Indicates the operation wave height, D 0 means the ship's draft, λ Indicates steep waves. a, b, c, d Both represent coefficients determined through experiments.

[0035] The calculation formula for the ship's translational motion is:

[0036] in, S Indicates the translational motion of the ship.

[0037] Understandably,T is the average wave period, TN is the wave natural period. In addition to the pitch and longitudinal natural periods, the pitch natural period is selected ( T 1) For other motions, the natural period of roll is used ( T o); H is the wave height, taking 4% of the cumulative probability wave height, i.e. H4%; D o is the draft; N is the size of the ship. In beam sea conditions, N Ship width B， Right now N = B， In favorable conditions, N The length between the ship columns L， Right now N = L . a,b,c,d is the coefficient to be determined in the formula. In addition, it should be noted that the natural period of the ballast is selected TN and draft D o, wavelength is calculated according to the design high water level.

[0038] In some embodiments, determining the ship operation standard based on the rotational motion amount and the translational motion amount of the ship includes: Determine the ship's rotation, roll and pitch based on the ship's rotational motion; Determine the heave, lateral and longitudinal displacement of the ship based on the translational motion of the ship; Determine the ship's operating standards based on the ship's turning, rolling and pitching, as well as the ship's heaving, lateral movement and longitudinal movement.

[0039] In some embodiments, the method for determining the ship operation standard further includes: The operating wave height is determined based on the wave period, wave type and ship load.

[0040] In some embodiments, determining the operational wave height based on the wave period, wave type and vessel load includes: Determine the initial operating wave height based on wave period, wave type and ship load; When the ship is an oil tanker or an LNG ship, and the initial operating wave height is greater than or equal to a preset first wave height threshold, the final operating wave height is determined to be the first wave height threshold.

[0041] It is understandable that the first wave high threshold may be 2m.

[0042] In some embodiments, determining the operating wave height based on the wave period, wave type and ship load further includes: When the ship is a bulk carrier or a barge, and the initial operating wave height is greater than the preset second wave height threshold, determining the final operating wave height to be the second wave height threshold; Among them, the sizes of the second wave height thresholds corresponding to different ship loads are different, and the sizes of the second wave height thresholds corresponding to different wave periods are different.

[0043] It can be understood that when the waves are transverse waves, the allowable wave height for ships over 150,000 tons is 1.5m / 1.2m (loading / unloading), the allowable wave height for ships over 50,000 tons is 1.2m / 0.8m (loading / unloading), and the allowable wave height for ships over 10,000 tons is 0.8m / 0.6m (loading / unloading); when the waves are in the direction of the waves, the allowable wave height for ships over 150,000 tons is 2.0m / 1.5m (loading / unloading), the allowable wave height for ships over 50,000 tons is 1.5m / 1.2m (loading / unloading), and the allowable wave height for ships over 10,000 tons is 1.0m / 0.8m (loading / unloading). Compared with the research results of the present invention, the index of the calculation of the allowable motion of the loader is very close to the standard results, while the index of the calculation of the motion of the unloader is somewhat different from the standard. The research results of this study are smaller in transverse waves and larger in the direction of the waves.

[0044] In some embodiments, the ships in the present invention include: oil tankers, LNG ships, bulk carriers and barges.

[0045] Oil tanker operating standards expressed in terms of wave height and period: Based on the test results of different working conditions, the envelope values ​​of the test results of each working condition with the same wave parameters, different loads, water levels, etc. were used to obtain the maximum full-amplitude values ​​of each motion of 300,000-ton, 150,000-ton, 50,000-ton and 10,000-ton oil tankers respectively.

[0046] For ease of use, according to the calculation results obtained by the calculation formula, under the mooring conditions given above, the distribution of the movement of 300,000-ton, 150,000-ton, 50,000-ton and 10,000-ton oil tankers with wave height and period can be calculated, and the movement of different oil tankers corresponding to different wave heights and periods can be determined. Or according to the movement allowed during ship operation, the wave parameters for oil tankers of different tonnages that can be allowed to operate can be obtained.

[0047] Considering that the control movement standard of the oil tanker is that the maximum value of the transverse or longitudinal displacement does not exceed 2.0m, based on the above calculation formulas for transverse displacement (the result when transverse waves act) and longitudinal displacement (the result when following waves act), Table 1 gives the standard operating wave heights corresponding to different periods when the ship operation standard is 2.0m (transverse and longitudinal displacement) for oil tankers of various tonnage classes when transverse waves and following waves act.

[0048] It should be noted that when the period is small, the wave height controlled by the movement amount when following the wave is large. Considering the complexity of the influencing factors and the provisions of relevant specifications, and the wave conditions in general sea areas when the period is small, it is recommended that the maximum standard wave height for operation be H 4% =2.0m, so H in Table 14% The wave height ≥2.0m is taken as H 4% =2.0m.

[0049] The corresponding operating wave height controlled based on the operating standard decreases with the increase of the period, but the change trend of the controlled wave height slows down when the period is large. The controlled wave height in the following waves is obviously larger than the controlled wave height in the transverse waves when the period is small. In general, except for the 10,000-ton oil tanker, the controlled wave height of the other three larger tonnage ships changes basically the same with the period.

[0050] my country's "General Design Code for Seaports" gives the permissible wave height for oil tanker loading and unloading operations when the wave period is no more than 8s. In transverse waves, the permissible wave height for ships over 150,000 tons is 1.5m, 50,000 tons is 1.2m, and 10,000 tons is 0.8m, which is very close to the results of this study when the period is T=8s for transverse waves. In following waves, the permissible wave height for ships over 150,000 tons is 2.0m, 50,000 tons is 1.5m, and 10,000 tons is 1.0m, which is quite different from the results of this study. This is mainly because ships are greatly affected by mooring conditions. If the mooring method and layout are adjusted, the operating wave height will change accordingly.

[0051] Table 1: Standard wave height H for different periods when the standard load and unload motion is 2.0m for different tonnage tankers 4% (m)

[0052] LNG (liquefied natural gas) ship operation standards expressed in terms of wave height and period: Based on the same method, the present invention analyzes the results of 6 motion quantities. Based on the test results of different working conditions, the envelope value of the test results of each working condition is used to obtain the maximum full-amplitude value of each motion quantity of 266,000 cubic meters, 160,000 cubic meters and 80,000 cubic meters LNG ships respectively.

[0053] The standard wave heights for different periods are calculated according to the ship operation standards. For LNG ships, the allowable values ​​for transverse and longitudinal displacement are 2.0m, but unlike oil tankers, the allowable values ​​for roll, pitch and turn of LNG ships are 2°. Based on the calculation formulas for transverse displacement (the result when transverse waves act) and longitudinal displacement (the result when following waves act) and the calculation results of the roll, pitch and turn calculation formulas, Table 2 gives the standard wave heights for different periods when the ship operation standard for oil tankers of various tonnages is 2.0m, the allowable values ​​for roll, pitch and turn are 2°, and transverse and following waves act. Similarly, considering the wave conditions in general sea areas when the period is small and the relevant regulations, it is recommended that the maximum standard wave height for operation be H 4% =2.0m, so H 4% The wave height ≥2.0m is taken as H 4% =2.0m.

[0054] For transverse waves, the rolling control is used when the waves have a smaller period (T≤13s), so the operation standard becomes smaller near the ship's resonance period. The rotation control is used when the waves have a larger period (T>13s), and the operation standard will slowly decrease as the period increases. The longitudinal displacement control is mostly used in the following waves, and the operation standard will decrease as the period increases. In addition, the control wave height in the following waves is mostly greater than the control wave height in the transverse waves.

[0055] Table 2: Standard wave height H4% (m) for different periods of LNG ships of different tonnages, when the standard transverse and longitudinal movement of loading and unloading operations is 2.0m, and the allowable values ​​of roll, pitch and rotation are 2°

[0056] Compared with the "Design Specifications for Liquefied Natural Gas Terminals", the ship's cabin capacity is greater than 80,000 cubic meters, the wave period is no more than 7s, the operating standard for transverse waves is 1.2m, and the operating standard for following waves is 1.5m. The research results of this invention have a certain gap with the standard. Affected by the mooring conditions, the results of this study are smaller in transverse waves and larger in following waves.

[0057] Operational standards for bulk carriers and barges expressed in terms of wave height and period: Based on the envelope values ​​of the test results under different working conditions, the maximum values ​​of the full amplitudes of the motion quantities of 300,000-ton, 150,000-ton, 50,000-ton, 10,000-ton bulk carriers and 12,000-ton barges (high-pile docks) were obtained respectively.

[0058] The loading and unloading processes of bulk carriers are different, and the allowable movement of operations varies greatly. The specification gives the allowable movement of three processes: grab unloader, continuous unloader and loader (see Table 3). Among them, the allowable movement of the loader is relatively large, and the continuous unloader has the most stringent requirements on the movement, and the corresponding standard wave heights of operations are also quite different. At the same time, since there is no barge operation index in the specification, it is also considered here according to the allowable movement standard of the continuous unloader of bulk carriers.

[0059] Table 3: Movement allowed for different loading and unloading methods of bulk carriers

[0060] Tables 5 and 6 respectively give the standard wave heights for different tonnage bulk carriers under different loading and unloading processes and at different periods. Among them, when the period is small, the maximum value of the standard wave height is H 4%=2.0m. Since there is no indicator of the amount of motion of barge operations in the specification, it is also considered here according to the standard of allowable motion of continuous unloaders of bulk carriers. Therefore, Table 5 also gives the standard wave heights for operations corresponding to different periods of barges. When the period is large, the standard wave height for operations becomes significantly smaller. This is mainly due to the large transverse and longitudinal displacement of the ship during long periods, and the relatively small requirements for the indicators for transverse and longitudinal displacement operations. In addition, the control wave height for operations in the following waves is significantly greater than the control wave height for operations in the transverse waves. The operating wave height of a 150,000-ton bulk carrier is slightly greater than that of a 300,000-ton bulk carrier. Compared with bulk carriers of other tonnages, the standard wave height for operations of 10,000-ton ships is the smallest when transverse waves act.

[0061] Refer to Table 4, the allowable wave height for bulk cargo loading and unloading operations when the wave period is no more than 8s: when the waves are transverse waves, the allowable wave height for more than 150,000 tons is 1.5m / 1.2m (loading / unloading), the allowable wave height for 50,000 tons is 1.2m / 0.8m (loading / unloading), and the allowable wave height for 10,000 tons is 0.8m / 0.6m (loading / unloading); when the waves are in the direction of the waves, the allowable wave height for more than 150,000 tons is 2.0m / 1.5m (loading / unloading), the allowable wave height for 50,000 tons is 1.5m / 1.2m (loading / unloading), and the allowable wave height for 10,000 tons is 1.0m / 0.8m (loading / unloading). Compared with the research results of the present invention, the index of the calculation of the allowable motion of the loader is very close to the standard results, while the index of the calculation of the motion of the unloader is different from the standard. The research results of this study are smaller in transverse waves and larger in the direction of the waves.

[0062] Table 4: Different tonnage bulk carriers, according to the allowable movement of bulk carrier grab unloader operation standards: rotation 2°, roll 6°, pitch 2°, lateral displacement 1.0m, longitudinal displacement 2.0m and heave 1.0m, the corresponding operating standard wave height H4% (m) at different periods

[0063] Table 5: Different tonnage bulk carriers, according to the allowable movement of bulk carriers during continuous unloading: 2° rotation, 2° roll, 2° pitch, 0.5m transverse movement, 1.0m longitudinal movement and 1.0m heave, the corresponding standard wave height H4% (m) for different periods

[0064] Table 6: Different tonnage bulk carriers, according to the allowable movement of bulk carrier ship loaders, the operating standard wave height H4% (m) corresponding to different periods when turning 3°, lateral displacement 2.5m, longitudinal displacement 5.0m

[0065] like Figure 2 As shown, the present invention also provides a device 200 for determining a ship operation standard, comprising: An acquisition module 201 is used to acquire the wave period, operating wave height and ship draft; The motion calculation module 202 is used to determine the rotational motion and translational motion of the ship based on the wave period, the operating wave height and the draft of the ship; The standard determination module 203 is used to determine the ship operation standard based on the rotational motion amount and the translational motion amount of the ship.

[0066] The device for determining the ship operation standard provided in the above embodiment can implement the technical solution described in the above embodiment of the method for determining the ship operation standard. The specific implementation principles of the above modules or units can refer to the corresponding contents in the above embodiment of the method for determining the ship operation standard, which will not be repeated here.

[0067] like Figure 3 As shown, the present invention also provides an electronic device 300. The electronic device 300 includes a processor 301, a memory 302 and a display 303. Figure 3 Only some components of the electronic device 300 are shown, but it should be understood that it is not required to implement all of the components shown, and more or fewer components may be implemented instead.

[0068] In some embodiments, the memory 302 may be an internal storage unit of the electronic device 300, such as a hard disk or memory of the electronic device 300. In other embodiments, the memory 302 may also be an external storage device of the electronic device 300, such as a plug-in hard disk, a smart memory card (SmartMediaCard, SMC), a secure digital (SecureDigital, SD) card, a flash card (FlashCard), etc. equipped on the electronic device 300.

[0069] Furthermore, the memory 302 may include both an internal storage unit of the electronic device 300 and an external storage device. The memory 302 is used to store application software installed in the electronic device 300 and various data.

[0070] In some embodiments, the processor 301 may be a central processing unit (CPU), a microprocessor or other data processing chip, used to run program codes or process data stored in the memory 302, such as the method for determining the ship operation standard in the present invention.

[0071] In some embodiments, the display 303 may be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, an OLED (Organic Light-Emitting Diode) touch device, etc. The display 303 is used to display information on the electronic device 300 and to display a visual user interface. The components 301-303 of the electronic device 300 communicate with each other via a system bus.

[0072] In some embodiments of the present invention, when the processor 301 executes the ship operation standard determination program in the memory 302, the following steps may be implemented: Obtain wave period, operating wave height and ship draft; Determine the ship's rotational motion and translational motion based on the wave period, operating wave height and ship draft; The ship operation standard is determined based on the ship's rotational motion and translational motion.

[0073] It should be understood that: when the processor 301 executes the ship operation standard determination program in the memory 302, in addition to the above functions, other functions can also be implemented. For details, please refer to the description of the corresponding method embodiment above.

[0074] Furthermore, the embodiment of the present invention does not specifically limit the type of the electronic device 300 mentioned, and the electronic device 300 may be a portable electronic device such as a mobile phone, a tablet computer, a personal digital assistant, a PDA, a wearable device, a laptop computer, etc. Exemplary embodiments of portable electronic devices include but are not limited to portable electronic devices equipped with IOS, Android, Microsoft or other operating systems. The above-mentioned portable electronic devices may also be other portable electronic devices, such as a laptop computer with a touch-sensitive surface (e.g., a touch panel). It should also be understood that in some other embodiments of the present invention, the electronic device 300 may not be a portable electronic device, but a desktop computer with a touch-sensitive surface (e.g., a touch panel).

[0075] In another aspect, the present invention further provides a non-transitory computer-readable storage medium having a computer program stored thereon, which is implemented when the computer program is executed by a processor to execute the method for determining the ship operation standard provided by the above methods, the method comprising: Obtain wave period, operating wave height and ship draft; Determine the ship's rotational motion and translational motion based on the wave period, operating wave height and ship draft; The ship operation standard is determined based on the ship's rotational motion and translational motion.

[0076] Those skilled in the art will appreciate that all or part of the processes of the above-mentioned embodiments can be implemented by instructing related hardware through a computer program, and the program can be stored in a computer-readable storage medium, wherein the computer-readable storage medium is a disk, an optical disk, a read-only storage memory, or a random access memory, etc.

[0077] The method and device for determining the ship operation standard provided by the present invention are introduced in detail above. Specific examples are used in this article to illustrate the principle and implementation mode of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation mode and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A method for determining ship operation standards, characterized in that: include: Obtain wave period, operating wave height and ship draft; Determine the ship's rotational motion and translational motion based on the wave period, operating wave height and ship draft; The ship operation standard is determined based on the ship's rotational motion and translational motion.

2. The method for determining ship operation standards according to claim 1, characterized in that: The wave period includes: the average wave period and the inherent wave period; Determine the ship's rotational motion based on the wave period, operating wave height and ship draft, including: The rotational motion of the ship is determined based on the average wave period, the natural wave period, the operating wave height, the ship draft, the wave steepness and the ship size.

3. The method for determining ship operation standards according to claim 2, characterized in that: In the case of beam waves, the ship dimension is the ship width; in the case of following waves, the ship dimension is the length between the ship columns.

4. The method for determining ship operation standards according to claim 3, characterized in that: The calculation formula for the rotational motion of the ship is: in, Indicates the rotational motion of the ship, Indicates the preset comprehensive coefficient, T represents the average wave period, TN represents the natural period of the wave, H Indicates the operation wave height, D 0 means the ship's draft, λ Indicates steep waves. a, b, c, d Both represent coefficients determined through experiments.

5. The method for determining ship operation standards according to claim 4, characterized in that: The calculation formula for the ship's translational motion is: in, S Indicates the translational motion of the ship.

6. The method for determining ship operation standards according to claim 1, characterized in that: Based on the rotational motion and translational motion of the ship, the ship operation standards are determined, including: Determine the ship's rotation, roll and pitch based on the ship's rotational motion; Determine the heave, lateral and longitudinal displacement of the ship based on the translational motion of the ship; Determine the ship's operating standards based on the ship's turning, rolling and pitching, as well as the ship's heaving, lateral movement and longitudinal movement.

7. The method for determining ship operation standards according to any one of claims 1 to 6, characterized in that: Also includes: The operating wave height is determined based on the wave period, wave type and ship load.

8. The method for determining ship operation standards according to claim 7, characterized in that: Determine the operational wave height based on wave period, wave type and ship load, including: Determine the initial operating wave height based on wave period, wave type and ship load; When the ship is an oil tanker or an LNG ship, and the initial operating wave height is greater than or equal to a preset first wave height threshold, the final operating wave height is determined to be the first wave height threshold.

9. The method for determining ship operation standards according to claim 8, characterized in that: Determine the operational wave height based on wave period, wave type and vessel load, including: When the ship is a bulk carrier or a barge, and the initial operating wave height is greater than the preset second wave height threshold, determining the final operating wave height to be the second wave height threshold; Among them, the sizes of the second wave height thresholds corresponding to different ship loads are different, and the sizes of the second wave height thresholds corresponding to different wave periods are different.

10. A device for determining ship operation standards, characterized in that: include: An acquisition module is used to obtain wave period, operating wave height and ship draft; A motion calculation module is used to determine the rotational motion and translational motion of the ship based on the wave period, operating wave height and draft of the ship; The standard determination module is used to determine the ship operation standard based on the rotational motion amount and the translational motion amount of the ship.

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