Canal channel section determination method and device based on ship speed, and electronic equipment

Abstract

The invention discloses a canal channel section determination method and device based on ship speed and electronic equipment, and relates to the field of channel design or other related fields, and the method comprises the steps: determining a rich water depth range and a draft depth based on the ship tonnage and type of a target ship, and calculating the minimum water depth of a channel corresponding to the target ship, calculating the minimum width of the channel corresponding to the target ship based on the total width and total length of the target ship, and calculating the section width of the channel at different navigational speeds and different water depths based on the navigational speed range of the target ship; when the channel section width is not smaller than the minimum channel width, the ship speed, the water depth and the channel section width used for calculating the channel section width are determined as to-be-selected section scales, the target section scale is determined in the to-be-selected section scales, and the canal channel section is determined based on the target section scale. The technical problem that the channel section size is too large due to the fact that the quantitative relation between the ship speed and the canal channel section is not considered in the prior art is solved.

Description

Technical Field

[0001] The present invention relates to the field of waterway design technology or other related fields, and in particular to a method and device for determining a canal waterway section based on a ship speed, and electronic equipment. Background Art

[0002] The canal waterway is an important part of inland waterway transportation, carrying a large amount of freight tasks, and plays an irreplaceable role in promoting regional economic exchanges and development. The waterway section scale is directly related to the land acquisition and earthwork excavation of the canal project, and is a controlling technical indicator for the investment and construction progress of the canal project. A reasonably designed canal waterway section can not only ensure the safe and efficient navigation of ships, but also effectively reduce project costs and environmental impacts. The cross-sectional design of the waterway needs to take into account factors such as water depth, width, and slope. Among them, the water depth of the waterway is directly related to the draft and navigation resistance of the ship, while the width of the waterway affects the navigation stability and route flexibility of the ship. Most of the existing waterway section design strategies are based on static ship dimensions and predetermined draft depths, ignoring the impact of dynamic factors (especially ship speed) on the waterway section design.

[0003] In the related technology, although the existing waterway design specifications and standards provide guidance for the design of waterway sections, there are deficiencies in dealing with the correlation between ship speed and waterway section scale. When ships sail in canal waterways, they are limited by the waterway section scale, which is quite different from open waters, mainly in terms of wave resistance, ship buoyancy and ship resistance. The wave resistance generated by ships sailing in inland waterways is closely related to the ship speed. When the ship speed is low, the impact of shallow water walls is relatively small. As the ship speed increases, the ship resistance will also increase, accompanied by the phenomenon of hull sinking and stern tilt. At this time, the wave wavelength is affected by the shallow water effect, which will cause the wave wavelength to be longer than that in open waters at the same speed, and the wave Kelvin angle will increase with the increase in speed. When the speed is further increased to the critical speed, the fluid velocity around the hull is limited by the critical speed, which will cause swells in front of the hull, and even more solitary waves, which will damage the channel slope embankment. At this time, the ship resistance value reaches a maximum value and the ship buoyancy is also in an extremely unstable state. Therefore, there is a speed limit for ships to navigate in the canal, that is, different ship types and different speeds have different requirements for the cross-sectional dimensions of the canal. In the existing relevant standards, the requirements of ship speed on the cross-sectional dimensions of the canal are not considered, and there is a lack of in-depth research on the interaction mechanism between speed and cross-sectional dimensions of the canal, which leads to the determined cross-sectional width of the canal being too large, occupying more land, and having slightly poor economic efficiency.

[0004] To address the above-mentioned problems, no effective solution has been proposed yet. Summary of the invention

[0005] The embodiments of the present invention provide a method and device for determining the canal channel section based on the ship speed, and an electronic device, so as to at least solve the technical problem that the quantitative relationship between the ship speed and the canal channel section is not considered in the related art, resulting in the channel section size being too large.

[0006] According to one aspect of an embodiment of the present invention, a method for determining a canal channel section based on ship speed is provided, comprising: determining a surplus water depth range and draft of a target ship based on the ship tonnage and ship type of the target ship, and calculating a minimum water depth of the channel corresponding to the target ship, wherein the surplus water depth range refers to a margin value for ensuring safe navigation of the target ship without touching the riverbed; calculating a minimum width of the channel corresponding to the target ship based on the total width and total length of the target ship; calculating channel section widths at different ship speeds and different water depths based on the ship speed range of the target ship, wherein the ship speed is within the ship speed range and the water depth is not less than the minimum water depth of the channel; when the channel section width is not less than the minimum channel width, determining the ship speed, water depth and channel section width used for calculating the channel section width as the candidate section scales, determining the target section scale among the candidate section scales, and determining the canal channel section based on the target section scale.

[0007] Optionally, before calculating the minimum water depth of the channel corresponding to the target ship, it also includes: obtaining the cargo type of the target ship, and determining the ship type of the target ship based on the cargo type; obtaining the cargo transportation volume of the target ship, and determining the ship tonnage of the target ship based on the cargo transportation volume; based on the ship type and ship tonnage, determining the total ship width and total ship length of the target ship.

[0008] Optionally, before calculating the minimum water depth of the channel corresponding to the target ship, it also includes: determining the ship square coefficient of the target ship based on the ship type; and calculating the flooded area of ​​the midship cross section of the target ship based on the total width of the ship, the draft depth and the ship square coefficient.

[0009] Optionally, the step of determining the surplus water depth range of the target ship includes: determining the channel grade of the target ship based on the ship tonnage; and determining the surplus water depth range of the target ship based on the channel grade.

[0010] Optionally, before calculating the channel cross-sectional width at different ship speeds and different water depths, it also includes: calculating the channel cross-sectional coefficient corresponding to the target ship based on the flooded area of ​​the midship cross-section, the draft depth and the minimum water depth of the channel of the target ship.

[0011] Optionally, before calculating the channel cross-sectional width at different ship speeds and different water depths, the method further includes: calculating a maximum ship speed range of the target ship based on the ship speed range of the target ship.

[0012] Optionally, the step of determining the target section scale includes: obtaining a pre-constructed section scale engineering quantity comparison table; querying the section scale engineering quantity comparison table to obtain the engineering cost corresponding to each group of section scales in the candidate section scales; and determining the candidate section scale corresponding to the minimum engineering cost as the target section scale.

[0013] According to another aspect of an embodiment of the present invention, there is also provided a device for determining a canal channel section based on ship speed, comprising: a first calculation unit, which determines the surplus water depth range and draft of the target ship based on the ship tonnage and ship type of the target ship, and calculates the minimum water depth of the channel corresponding to the target ship, wherein the surplus water depth range refers to the margin value for ensuring the safe navigation of the target ship without touching the riverbed; a second calculation unit, which calculates the minimum width of the channel corresponding to the target ship based on the total width and total length of the target ship; a third calculation unit, which calculates the channel section width at different ship speeds and different water depths based on the ship speed range of the target ship, wherein the ship speed is within the ship speed range and the water depth is not less than the minimum water depth of the channel; a determination unit, which is used to determine the ship speed, water depth and channel section width used for calculating the channel section width as the candidate section scale when the channel section width is not less than the minimum channel width, determine the target section scale among the candidate section scales, and determine the canal channel section based on the target section scale.

[0014] Optionally, the first calculation unit includes: a first determination module, used to obtain the cargo type of the target ship, and determine the ship type of the target ship based on the cargo type; a second determination module, used to obtain the cargo transportation volume of the target ship, and determine the ship tonnage of the target ship based on the cargo transportation volume; a third determination module, based on the ship type and ship tonnage, determines the total ship width and total ship length of the target ship.

[0015] Optionally, the first calculation unit also includes: a fourth determination module, which determines the ship square coefficient of the target ship based on the ship type; and a fifth determination module, which calculates the flooded area of ​​the midship cross section of the target ship based on the total width of the ship, the draft depth and the ship square coefficient.

[0016] Optionally, the first calculation unit further includes: a sixth determination module, which determines the channel grade of the target ship based on the ship tonnage; and a seventh determination module, which determines the surplus water depth range of the target ship based on the channel grade.

[0017] Optionally, the third calculation unit includes: an eighth determination module, which calculates the channel section coefficient corresponding to the target ship based on the flooded area of ​​the midship cross-section, the draft and the minimum water depth of the channel of the target ship.

[0018] Optionally, the third calculation unit further includes: a ninth determination module, which calculates a limit ship speed range of the target ship based on the ship speed range of the target ship.

[0019] Optionally, the determination unit includes: an acquisition module for acquiring a pre-constructed section scale engineering quantity comparison table; a query module for querying the section scale engineering quantity comparison table to obtain the engineering cost corresponding to each group of section scales in the selected section scales; and a tenth determination module for determining the selected section scale corresponding to the minimum engineering cost as the target section scale.

[0020] According to another aspect of an embodiment of the present invention, a computer-readable storage medium is further provided, wherein the computer-readable storage medium includes a stored computer program, wherein when the computer program is running, the device where the computer-readable storage medium is located is controlled to execute any one of the above-mentioned methods for determining the canal channel section based on the ship speed.

[0021] According to another aspect of an embodiment of the present invention, there is also provided an electronic device, comprising one or more processors and a memory, wherein the memory is used to store one or more programs, wherein when the one or more programs are executed by the one or more processors, the one or more processors implement any one of the above-mentioned methods for determining the canal channel section based on the ship speed.

[0022] According to another aspect of an embodiment of the present invention, there is further provided a computer program product, comprising a computer program, which, when executed by a processor, implements the steps of any one of the above-mentioned methods for determining a canal channel section based on ship speed.

[0023] In the present disclosure, the surplus water depth range and draft of the target ship are determined based on the ship tonnage and ship type of the target ship, and the minimum water depth of the channel corresponding to the target ship is calculated, and then the minimum width of the channel corresponding to the target ship is calculated based on the total ship width and total ship length of the target ship, and then based on the ship speed range of the target ship, the channel cross-sectional width at different ship speeds and different water depths is calculated, wherein the ship speed is within the ship speed range and the water depth is not less than the minimum water depth of the channel, and finally, when the channel cross-sectional width is not less than the minimum channel width, the ship speed, water depth and channel cross-sectional width used to calculate the channel cross-sectional width are determined as the candidate cross-sectional scales, the target cross-sectional scale is determined among the candidate cross-sectional scales, and the canal channel cross-sectional width is determined based on the target cross-sectional scale.

[0024] From the above disclosed content, the present invention can ensure the safe navigation of the ship in the channel without touching the riverbed by accurately calculating the minimum water depth and minimum width of the channel of the target ship. By taking the speed range of the target ship into consideration, the quantitative effect between the ship speed and the channel section at different speeds can be more accurately evaluated, thereby calculating a more reasonable channel section width. At the same time, by calculating the channel section width at different ship speeds and different water depths, the section size with the lowest engineering cost is found while meeting the safety navigation standards, thereby reducing unnecessary engineering excavation and land occupation, and improving the overall economy of the waterway project, thereby solving the technical problem that the quantitative relationship between the ship speed and the canal channel section is not considered in the related technology, resulting in a larger channel section size. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0026] Figure 1 is a flow chart of an optional method for determining a canal channel section based on a ship speed according to an embodiment of the present invention;

[0027] Figure 2 is a schematic diagram of an optional canal channel cross section according to an embodiment of the present invention;

[0028] Figure 3 is a schematic diagram of an optional device for determining a canal channel section based on a ship speed according to an embodiment of the present invention;

[0029] Figure 4 It is a hardware structure block diagram of an electronic device (or mobile device) for executing a method for determining a canal channel section based on a ship speed according to an embodiment of the present invention. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings 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 ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0031] It should be noted that the terms "first", "second", etc. in the specification 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 the data used in this way can be interchanged where appropriate, 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 "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0032] It should be noted that the method and device for determining the canal channel section based on the ship speed in the present disclosure can be used in the field of channel design technology. When the canal channel section is determined based on the ship speed, it can also be used in any field except the field of channel design technology. When the canal channel section is determined based on the ship speed, the present disclosure does not limit the application field of the method and device for determining the canal channel section based on the ship speed.

[0033] The following embodiments of the present invention can be applied to various systems / applications / devices for determining the cross-section of a canal channel based on the ship speed. The present invention ensures that the ship can safely navigate in the channel without touching the riverbed by accurately calculating the minimum water depth and the minimum width of the channel of the target ship. By taking the speed range of the target ship into consideration, the quantitative effect between the ship speed and the channel cross-section at different speeds is more accurately evaluated, thereby calculating a more reasonable channel cross-sectional width. At the same time, by calculating the channel cross-sectional width at different ship speeds and different water depths, the cross-sectional scale with the lowest engineering cost is found while meeting the safety navigation standards, thereby reducing unnecessary engineering excavation and land occupation, and improving the overall economy of the waterway project.

[0034] The present invention is described in detail below in conjunction with various embodiments.

[0035] Embodiment 1

[0036] According to an embodiment of the present invention, an embodiment of a method for determining a canal channel section based on a ship speed is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in an order different from that shown here.

[0037] Figure 1 is a flow chart of an optional method for determining a canal channel section based on a ship speed according to an embodiment of the present invention, such as Figure 1 As shown, the method comprises the following steps:

[0038] Step S101, based on the tonnage and type of the target ship, determine the surplus water depth range and draft of the target ship, and calculate the minimum water depth of the channel corresponding to the target ship, wherein the surplus water depth range refers to the margin value to ensure the safe navigation of the target ship without touching the riverbed.

[0039] The minimum water depth of a waterway refers to the minimum safety depth required for ships to sail at full load under certain local natural conditions, that is, to ensure that the ship does not run the risk of hitting the bottom and has less resistance when sailing at high speed. For canal waterways, the minimum water depth of the waterway should include the ship's draft and the surplus water depth. The calculation formula for the minimum water depth of the waterway is:

[0040] h=T+Δt,

[0041] Among them, h represents the minimum water depth of the channel, T represents the draft of the ship, and Δt represents the surplus water depth.

[0042] It should be noted that the surplus water depth range refers to the margin value to ensure the safe navigation of the target ship without touching the riverbed. The surplus water depth range varies according to the different waterway grades, as shown in Table 1 below:

[0043] Table 1

[0044] Channel grade Ⅱ Ⅲ Ⅳ Ⅴ Rich water depth range / m 0.8-1.0 0.5-0.7 0.3-0.5 0.3-0.5

[0045] It can be seen from Table 1 that for Class II waterways, the surplus water depth ranges from 0.8 to 1.0 meters; while for Class V waterways, the surplus water depth ranges from 0.3 to 0.5 meters.

[0046] The embodiment of the present invention first determines the draft of the target ship and the corresponding waterway grade according to the ship tonnage and ship type of the target ship. For example, when the ship tonnage is 10 million tons / year and the ship type is a dry bulk carrier, the draft of the ship is 2.3m, corresponding to the use of a Class III waterway.

[0047] Based on the channel grade, the surplus water depth range is obtained from Table 1. For example, the surplus water depth range corresponding to the Class III channel is 0.5-0.7m. In the embodiment of the present invention, the median is taken as the surplus water depth of the target ship, that is, 0.6m.

[0048] Finally, the minimum water depth of the channel for the target ship is calculated according to the calculation formula of the minimum water depth of the channel. For example, the minimum water depth of the channel for a 10 million tons / year dry bulk carrier is (2.3+0.6=2.9) m.

[0049] Step S102, based on the total width and total length of the target ship, the minimum width of the channel corresponding to the target ship is calculated.

[0050] Next, the minimum channel width corresponding to the target ship is calculated to more accurately predict the behavior of the ship in the channel, ensuring that the channel design not only meets the size requirements of the target ship, but also provides them with sufficient safety margin to avoid collisions and bottoming accidents. The calculation formula for the minimum channel width is:

[0051] B 2 =2B f +2d+c,

[0052] B f =B s +Lsinβ,

[0053] Among them, B 2 Indicates the minimum width of the channel, B f represents the width of the ship's track, d represents the safe distance from the ship's outer side to the edge of the channel, c represents the safe navigation distance between ships, and B s represents the total width of the ship, L represents the total length of the ship, and β represents the drift angle of the ship. It should be noted that 2d+c is the sum of various safety distances, which is usually 1.5 times the width of the ship's track. The value of β is usually 2.5°.

[0054] The embodiment of the present invention first obtains the total width and total length of the target ship, and calculates the minimum width of the channel based on the above formula, as shown in Table 2 below:

[0055] Table 2

[0056] Ship tonnage captain Ship width Sailing drift angle (°) Track width The sum of safety distances Minimum channel width 1000 60 10.8 2.5 13.42 20.13 46.96

[0057] As shown in Table 2, when the tonnage of the target ship is 10 million tons / year, the total length of the ship is 60m, and the total width of the ship is 10.8m, the navigation drift angle is 2.5°, and the track width B is calculated. f is 13.42, the sum of the safety distances 2d+c is 20.13, and the final calculated minimum channel width of the target ship is 46.96m. In the embodiment of the present invention, the minimum channel width can be rounded to 47m.

[0058] Step S103, based on the ship speed range of the target ship, calculate the channel cross-sectional width at different ship speeds and different water depths, wherein the ship speed is within the ship speed range and the water depth is not less than the minimum water depth of the channel.

[0059] After calculating the minimum water depth and minimum width of the channel corresponding to the target ship, the embodiment of the present invention calculates the channel section coefficient corresponding to the target ship based on the flooded area of ​​the midship cross section, the draft and the minimum water depth of the channel. The channel section coefficient is an important indicator to measure the adaptability of the channel to the target ship. According to relevant standards, the value of the channel section coefficient shall not be less than 6. When the channel section coefficient is calculated using the minimum width of the channel and the minimum water depth of the channel, the value of the channel section coefficient may be less than 6, and the relevant standard that the value of the channel section coefficient shall not be less than 6 is not met. Therefore, under the conditions of meeting the minimum water depth and minimum width of the channel required for safe navigation of the ship, in order to achieve a certain speed and meet the section coefficient requirements, it is necessary to increase the water-passing cross-sectional area of ​​the channel to reduce the ship's resistance.

[0060] However, according to shipping research results, when ships travel in restrictive waterways, they are subject to boundary conditions and have a maximum speed, which is 1.25 times the design speed (i.e. the ship's speed).

[0061] The embodiment of the present invention first calculates the speed limit range of the target ship according to the speed range of the target ship, and then calculates the channel cross-sectional width under different ship speeds and different water depths according to the following formula (1), which is:

[0062]

[0063] Where, g is the acceleration due to gravity, which is 9.8 m / s2, h is the water depth (m), and A s A represents the flooded area of ​​the target ship's mid-section (square meters). c It represents the cross-sectional area of ​​the waterway (square meters). The calculation formula of the cross-sectional area of ​​the waterway is:

[0064] A c =[B 2 -2m×(hT)+m]×h,

[0065] Among them, A c Indicates the cross-sectional area of ​​the waterway (square meters), B 2 It represents the width of the channel (meters), m represents the slope coefficient (which can be obtained by consulting relevant standards), h represents the water depth (meters), and T represents the draft depth of the ship (meters).

[0066] As shown in formula (1), when the water depth, the flooded area of ​​the midship cross section, the slope coefficient, and the ship's draft are all known and fixed, the channel width changes with the change of the maximum speed.

[0067] It should be noted that when calculating the channel cross-sectional width at different ship speeds and water depths, the selected ship speed is within the ship speed range and the water depth is not less than the minimum water depth of the channel.

[0068] For example, for a 10 million ton / year dry bulk carrier in the Beijing-Hangzhou Canal, the ship speed ranges from 8km / h to 12km / h, and the minimum water depth of the channel is 2.9m. Therefore, when calculating the channel width corresponding to the ship, the selected ship speed is between 8km / h and 12km / h, and the selected water depth is not less than 2.9m. The cross-sectional dimensions of the ship at different ship speeds and different water depths are shown in Table 3 below:

[0069] Table 3

[0070]

[0071]

[0072] As shown in Table 3, when the ship speed is 8 km / h, the maximum speed is 2.78 ms. -1 At this time, when the water depth is 2.9m, the calculated channel width is 52m.

[0073] Figure 2 is a schematic diagram of an optional canal channel section according to an embodiment of the present invention, such as Figure 2 As shown in the figure, the middle square represents the target ship, m represents the slope coefficient, and the channel width B 2 is the calculation target of this step.

[0074] Step S104, when the channel section width is not less than the minimum channel width, the ship speed, water depth and channel section width used to calculate the channel section width are determined as the candidate section scales, the target section scale is determined among the candidate section scales, and the canal channel section is determined based on the target section scale.

[0075] After obtaining the channel cross-sectional width at different ship speeds and different water depths, when the calculated channel cross-sectional width is not less than the minimum channel width, the corresponding cross-sectional scales can be selected. For example, for a 10 million tons / year dry bulk ship in the Beijing-Hangzhou Canal, the minimum channel width is 47m. Then in Table 3, the cross-sectional scales with a channel width of not less than 47m are all candidate cross-sectional scales.

[0076] Finally, the embodiment of the present invention obtains the engineering cost corresponding to each group of section scales in the candidate section scales by querying the pre-constructed section scale engineering quantity comparison table, determines the candidate section scale corresponding to the minimum engineering cost as the target section scale, and then determines the canal channel section according to the target section scale.

[0077] Optionally, before calculating the minimum water depth of the channel corresponding to the target ship, it also includes: obtaining the cargo type of the target ship, and determining the ship type of the target ship based on the cargo type; obtaining the cargo transportation volume of the target ship, and determining the ship tonnage of the target ship based on the cargo transportation volume; based on the ship type and ship tonnage, determining the total ship width and total ship length of the target ship.

[0078] Before calculating the minimum water depth of the channel corresponding to the target ship, the embodiment of the present invention first requires the ship type and ship tonnage of the target ship.

[0079] The type of ship is determined according to the type of cargo of the target ship. Common types of inland water transport cargo include: dry bulk cargo, chemicals, oil products, containers, cars, etc. The corresponding ship types are dry bulk carriers, chemical tankers, oil tankers, container ships, and roll-on / roll-off cargo ships.

[0080] The ship tonnage is determined according to the cargo transportation volume of the target ship, that is, the ship tonnage is determined by counting the weight of the cargo transportation volume. The ship tonnage includes: 10 million tons / year, 50 million tons / year, 100 million tons / year, etc.

[0081] After determining the ship type and tonnage of the target ship, the overall width and overall length of the target ship are determined by querying the relevant tables. Taking the dry bulk carrier in the Beijing-Hangzhou Canal as an example, the overall width and overall length of the target ship are determined by querying Table 4, which is shown below:

[0082] Table 4

[0083]

[0084] As shown in Table 4, the ship type number of a 10 million tons / year dry bulk carrier may be JH-H4, which corresponds to a ship width of 10.8m and a ship length of 60.0m.

[0085] Optionally, before calculating the minimum water depth of the channel corresponding to the target ship, it also includes: determining the ship square coefficient of the target ship based on the ship type; and calculating the flooded area of ​​the midship cross section of the target ship based on the total width of the ship, the draft depth and the ship square coefficient.

[0086] At the same time, before calculating the minimum water depth of the channel corresponding to the target ship, it is also necessary to calculate the flooded area of ​​the target ship's midship cross-section. The midship cross-section refers to the vertical cross-section along the longitudinal centerline of the ship, and the flooded area refers to the area of ​​the cross-section below the waterline. The flooded area of ​​the midship cross-section is of great significance for calculating the hydrodynamic resistance of the ship and evaluating the carrying capacity of the channel.

[0087] Before calculating the flooded area of ​​the midship cross section, first determine the ship's block coefficient based on the ship type. For example, the ship's block coefficient for a dry bulk carrier is 0.825.

[0088] Then, based on the ship's overall width, draft and ship square coefficient, the flooded area of ​​the target ship's midship cross section is calculated using the following formula:

[0089] A s =B s ×T×C b ,

[0090] Among them, A s Indicates the flooded area of ​​the midship cross section, B s represents the overall width of the ship, T represents the draft, C b Indicates the ship's square coefficient. For example, the flooded area of ​​the midship cross section of a 10 million ton / year dry bulk carrier is 10.8×2.3×0.825=20.493 square meters.

[0091] Optionally, the step of determining the surplus water depth range of the target ship includes: determining the channel grade of the target ship based on the ship tonnage; and determining the surplus water depth range of the target ship based on the channel grade.

[0092] It should be noted that when determining the surplus water depth range of the target ship, the channel grade of the target ship is first determined based on the ship tonnage, and then based on the channel grade, the surplus water depth range of the target ship is queried from Table 1. For example, for the Class II channel, the surplus water depth range is between 0.8 and 1.0 meters; for the Class III channel, the surplus water depth range is between 0.5 and 0.7 meters; for the Class IV channel, the surplus water depth range is between 0.3 and 0.5 meters; and for the Class V channel, the surplus water depth range is between 0.3 and 0.5 meters.

[0093] Optionally, before calculating the channel cross-sectional width at different ship speeds and different water depths, it also includes: calculating the channel cross-sectional coefficient corresponding to the target ship based on the flooded area of ​​the midship cross-section, the draft depth and the minimum water depth of the channel of the target ship.

[0094] After calculating the minimum water depth and minimum width of the channel corresponding to the target ship, the embodiment of the present invention calculates the channel section coefficient corresponding to the target ship based on the flooded area of ​​the midship cross section of the target ship, the draft depth and the minimum water depth of the channel. The channel section coefficient is an important indicator to measure the adaptability of the channel to the target ship. It not only affects the economy of the channel, but also directly relates to the navigation safety and efficiency of the ship in the channel.

[0095] According to relevant standards, the value of the channel section coefficient shall not be less than 6. The calculation of the channel section coefficient is based on the evaluation of the relationship between the geometric characteristics of the channel section and the part of the ship immersed in water at a specific draft depth (i.e., the midship cross-section flooded area). The channel section coefficient can be regarded as the ratio of the effective cross-sectional area of ​​the channel to the midship cross-sectional flooded area of ​​the target ship. It reflects the ability of the channel to provide free navigation space for the target ship. The calculation formula of the channel section coefficient is:

[0096]

[0097] Among them, K c Indicates the channel section coefficient, A c A represents the cross-sectional area of ​​the waterway. s It represents the flooded area of ​​the midship cross section. Among them, the cross-sectional area of ​​the channel can be approximately calculated by multiplying the channel width and the channel depth.

[0098] When the channel section coefficient is calculated using the minimum channel width and the minimum channel water depth, the value of the channel section coefficient may be less than 6, which does not meet the relevant standard that the value of the channel section coefficient shall not be less than 6. Therefore, under the conditions of meeting the minimum channel water depth and minimum channel width required for safe navigation of ships, in order to achieve a certain speed and meet the section coefficient requirements, the water-passing cross-sectional area of ​​the channel needs to be increased to reduce ship resistance.

[0099] Optionally, before calculating the channel cross-sectional width at different ship speeds and different water depths, the method further includes: calculating a maximum ship speed range of the target ship based on the ship speed range of the target ship.

[0100] Before calculating the channel cross-sectional width at different ship speeds and different water depths, the embodiment of the present invention needs to determine the ship speed of the target ship. For example, according to statistics, the design speed of ships in the Yangtze River system is generally 15km / h to 18km / h, and the container ship is higher, reaching more than 20km / h; the design speed of ships in the Pearl River system is relatively low, usually around 12km / h; the design speed of dry bulk carriers in the Beijing-Hangzhou Canal is 8km / h to 12km / h.

[0101] After determining the speed of the target ship, calculate the maximum speed range of the target ship. According to the research results of shipping, when a ship travels in a restricted channel, it is subject to boundary conditions and has a maximum speed, which is 1.25 times the design speed.

[0102] Optionally, the step of determining the target section scale includes: obtaining a pre-constructed section scale engineering quantity comparison table; querying the section scale engineering quantity comparison table to obtain the engineering cost corresponding to each group of section scales in the candidate section scales; and determining the candidate section scale corresponding to the minimum engineering cost as the target section scale.

[0103] When determining the target section scale, first obtain the pre-constructed section scale engineering quantity comparison table, and obtain the engineering cost corresponding to each group of section scales in the candidate section scales by querying the section scale engineering quantity comparison table, and determine the candidate section scale corresponding to the minimum engineering cost as the target section scale.

[0104] In the embodiment of the present invention, under the condition of a given ship speed, the excavation engineering quantity, the bank protection engineering quantity and the investment are calculated according to the relationship between the terrain, geological conditions and the designed water level, and the cross-sectional dimension with low construction cost is selected as the recommended dimension. For example, if the ship speed is selected to be 10km / h, h=2.9m, B 2 =90m, h=3.0m, B 2 =84m, h=3.1m, B 2 =78m, h=3.2m, B 2 =72m, h=3.3m, B 2 =68m, h=3.4m, B 2 =64m, h=3.5m, B 2 =60.5m for economic comparison and selection of the cross-section size. As shown in Table 5 below:

[0105] Table 5

[0106]

[0107]

[0108] As shown in Table 5, when the ship speed is 10 km / h, h = 3.5 m, B 2 =60.5m is more economical and can be determined as the target section size.

[0109] The steps provided by the above-mentioned method for determining the canal channel section based on the ship speed are to determine the surplus water depth range and draft depth of the target ship based on the ship tonnage and ship type of the target ship, and calculate the minimum water depth of the channel corresponding to the target ship, and then calculate the minimum width of the channel corresponding to the target ship based on the total width and total length of the target ship, and then calculate the channel section width at different ship speeds and different water depths based on the ship speed range of the target ship, wherein the ship speed is within the ship speed range and the water depth is not less than the minimum water depth of the channel, and finally, when the channel section width is not less than the minimum width of the channel, the ship speed, water depth and channel section width used to calculate the channel section width are determined as the candidate section scales, the target section scale is determined among the candidate section scales, and the canal channel section is determined based on the target section scale.

[0110] In an embodiment of the present invention, by accurately calculating the minimum water depth and minimum width of the channel of the target ship, it is ensured that the ship can navigate safely in the channel without touching the riverbed. By taking the speed range of the target ship into consideration, the quantitative effect between the ship speed and the channel section at different speeds is more accurately evaluated, thereby calculating a more reasonable channel section width. At the same time, by calculating the channel section width at different ship speeds and different water depths, the section size with the lowest engineering cost is found while meeting the safety navigation standards, thereby reducing unnecessary engineering excavation and land occupation, and improving the overall economy of the waterway project, thereby solving the technical problem that the quantitative relationship between the ship speed and the canal channel section is not considered in the related technology, resulting in a larger channel section size.

[0111] The following is a detailed description in conjunction with another embodiment.

[0112] Embodiment 2

[0113] The device for determining the canal channel section based on the ship speed provided in this embodiment includes a plurality of implementation units, each of which corresponds to each implementation step in the above-mentioned embodiment 1.

[0114] Figure 3 is a schematic diagram of an optional device for determining a canal channel section based on a ship speed according to an embodiment of the present invention, such as Figure 3 As shown, the device for determining the canal channel section based on the ship speed may include: a first calculation unit 31 , a second calculation unit 32 , a third calculation unit 33 , and a determination unit 34 .

[0115] Among them, the first calculation unit 31 determines the surplus water depth range and draft of the target ship based on the ship tonnage and ship type of the target ship, and calculates the minimum water depth of the channel corresponding to the target ship, wherein the surplus water depth range refers to the margin value to ensure the safe navigation of the target ship without touching the riverbed.

[0116] The second calculation unit 32 calculates the minimum width of the channel corresponding to the target ship based on the total width and total length of the target ship.

[0117] The third calculation unit 33 calculates the channel cross-sectional width at different ship speeds and different water depths based on the ship speed range of the target ship, wherein the ship speed is within the ship speed range and the water depth is not less than the minimum water depth of the channel.

[0118] The determination unit 34 is used to determine the ship speed, water depth and channel cross-sectional width used to calculate the channel cross-sectional width as the candidate cross-sectional scales when the channel cross-sectional width is not less than the minimum channel width, determine the target cross-sectional scale among the candidate cross-sectional scales, and determine the canal channel cross-sectional scale based on the target cross-sectional scale.

[0119] The above-mentioned canal channel section determination device based on ship speed can determine the surplus water depth range and draft of the target ship based on the ship tonnage and ship type of the target ship through the first calculation unit 31, and calculate the minimum water depth of the channel corresponding to the target ship, and then calculate the minimum width of the channel corresponding to the target ship based on the total width and total length of the target ship through the second calculation unit 32, and then calculate the channel section width under different ship speeds and different water depths based on the ship speed range of the target ship through the third calculation unit 33, wherein the ship speed is within the ship speed range and the water depth is not less than the minimum water depth of the channel, and finally, the ship speed, water depth and channel section width used for calculating the channel section width are determined as the candidate section scales through the determination unit 34 when the channel section width is not less than the minimum channel width, and the target section scale is determined in the candidate section scales, and the canal channel section is determined based on the target section scale.

[0120] The embodiment of the present invention ensures that the ship can safely navigate in the channel without touching the riverbed by accurately calculating the minimum water depth and the minimum width of the channel of the target ship. By taking the speed range of the target ship into consideration, the quantitative effect between the ship speed and the channel section at different speeds is more accurately evaluated, thereby calculating a more reasonable channel section width. At the same time, by calculating the channel section width at different ship speeds and different water depths, the section size with the lowest engineering cost is found while meeting the safety navigation standards, thereby reducing unnecessary engineering excavation and land occupation, and improving the overall economy of the waterway project, thereby solving the technical problem that the quantitative relationship between the ship speed and the canal channel section is not considered in the related technology, resulting in a larger channel section size.

[0121] Optionally, the first calculation unit 31 includes: a first determination module, used to obtain the cargo type of the target ship, and determine the ship type of the target ship based on the cargo type; a second determination module, used to obtain the cargo transportation volume of the target ship, and determine the ship tonnage of the target ship based on the cargo transportation volume; a third determination module, based on the ship type and ship tonnage, determines the total ship width and total ship length of the target ship.

[0122] Optionally, the first calculation unit 31 also includes: a fourth determination module, which determines the ship square coefficient of the target ship based on the ship type; and a fifth determination module, which calculates the flooded area of ​​the midship cross section of the target ship based on the total width, draft and ship square coefficient of the ship.

[0123] Optionally, the first calculation unit 31 further includes: a sixth determination module, which determines the channel grade of the target ship based on the ship tonnage; and a seventh determination module, which determines the surplus water depth range of the target ship based on the channel grade.

[0124] Optionally, the third calculation unit 33 includes: an eighth determination module, which calculates the channel section coefficient corresponding to the target ship based on the flooded area of ​​the midship cross-section, the draft and the minimum water depth of the channel of the target ship.

[0125] Optionally, the third calculation unit 33 further includes: a ninth determination module, which calculates the limit ship speed range of the target ship based on the ship speed range of the target ship.

[0126] Optionally, the determination unit 34 includes: an acquisition module, used to obtain a pre-constructed section scale engineering quantity comparison table; a query module, used to query the section scale engineering quantity comparison table to obtain the engineering cost corresponding to each group of section scales in the selected section scales; and a tenth determination module, used to determine the selected section scale corresponding to the minimum engineering cost as the target section scale.

[0127] The above-mentioned canal channel section determination device based on ship speed may also include a processor and a memory. The above-mentioned first calculation unit 31, the second calculation unit 32, the third calculation unit 33, the determination unit 34, etc. are all stored in the memory as program units, and the processor executes the above-mentioned program units stored in the memory to realize corresponding functions.

[0128] The processor includes a kernel, which retrieves the corresponding program unit from the memory. One or more kernels can be set, and the canal channel section can be determined based on the ship speed by adjusting the kernel parameters.

[0129] The above-mentioned memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM, and the memory includes at least one storage chip.

[0130] According to another aspect of an embodiment of the present invention, a computer-readable storage medium is further provided, the computer-readable storage medium including a stored computer program, wherein when the computer program is running, the device where the computer-readable storage medium is located is controlled to execute any one of the methods for determining the canal channel section based on the ship speed in the above-mentioned embodiment 1.

[0131] According to another aspect of an embodiment of the present invention, there is also provided an electronic device, comprising one or more processors and a memory, the memory being used to store one or more programs, wherein when the one or more programs are executed by one or more processors, the one or more processors implement any one of the methods for determining a canal channel section based on a ship speed in the above-mentioned embodiment 1.

[0132] The present application also provides a computer program product, including a computer program, which, when executed by a processor, implements the steps of the method for determining the canal channel section based on the ship speed described in each embodiment of the present application.

[0133] The present application also provides a computer program product, including a non-volatile computer-readable storage medium, wherein the non-volatile computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the method for determining the canal channel section based on the ship speed described in each embodiment of the present application are implemented.

[0134] Figure 4 1 is a hardware structure block diagram of an electronic device (or mobile device) for executing a method for determining a canal channel section based on a ship speed according to an embodiment of the present invention. Figure 4 As shown, the electronic device may include one or more ( Figure 4 402a, 402b, ..., 402n are used to illustrate) a processor (the processor may include but is not limited to a processing device such as a microprocessor MCU or a programmable logic device FPGA), and a memory 404 for storing data. In addition, it may also include: a display, an input / output interface (I / O interface), a universal serial bus (USB) port (which may be included as one of the ports of the I / O interface), a network interface, a keyboard, a power supply and / or a camera. It can be understood by those skilled in the art that Figure 4 The structure shown is only for illustration and does not limit the structure of the above electronic device. Figure 4 More or fewer components as shown, or with Figure 4 Different configurations are shown.

[0135] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0136] In the above embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0137] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0138] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0139] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0140] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk and other media that can store program codes.

[0141] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for determining a canal channel section based on ship speed, characterized in that: include: Based on the tonnage and type of the target ship, determine the surplus water depth range and draft of the target ship, and calculate the minimum water depth of the channel corresponding to the target ship, wherein the surplus water depth range refers to the margin value to ensure the safe navigation of the target ship without touching the riverbed; Calculating the minimum width of the channel corresponding to the target ship based on the overall width and overall length of the target ship; Based on the ship speed range of the target ship, calculating the channel cross-sectional width at different ship speeds and different water depths, wherein the ship speed is within the ship speed range and the water depth is not less than the minimum water depth of the channel; When the channel cross-sectional width is not less than the minimum channel width, the ship speed, water depth and channel cross-sectional width used to calculate the channel cross-sectional width are determined as the candidate cross-sectional scales, the target cross-sectional scale is determined among the candidate cross-sectional scales, and the canal channel cross-sectional scale is determined based on the target cross-sectional scale.

2. The cross-section determination method according to claim 1, characterized in that: Before calculating the minimum water depth of the channel corresponding to the target ship, the method further includes: Acquiring the cargo type of the target ship, and determining the ship type of the target ship based on the cargo type; Acquiring the cargo transportation volume of the target ship, and determining the ship tonnage of the target ship based on the cargo transportation volume; Based on the ship type and the ship tonnage, the overall width and overall length of the target ship are determined.

3. The cross-section determination method according to claim 2, characterized in that: Before calculating the minimum water depth of the channel corresponding to the target ship, the method further includes: Based on the ship type, determining the ship block coefficient of the target ship; The flooded area of ​​the midship cross section of the target ship is calculated based on the overall width of the ship, the draft and the ship square coefficient.

4. The cross-section determination method according to claim 1, characterized in that: The step of determining the rich water depth range of the target ship comprises: Determining the channel grade of the target ship based on the tonnage of the ship; Based on the waterway grade, a surplus water depth range for the target ship is determined.

5. The cross-section determination method according to claim 1, characterized in that: Before calculating the channel cross-sectional width at different ship speeds and water depths, it also includes: Based on the flooded area of ​​the midship cross-section of the target ship, the draft and the minimum water depth of the channel, the channel section coefficient corresponding to the target ship is calculated.

6. The cross-section determination method according to claim 1, characterized in that: Before calculating the channel cross-sectional width at different ship speeds and water depths, it also includes: Based on the ship speed range of the target ship, a limit ship speed range of the target ship is calculated.

7. The cross-section determination method according to claim 1, characterized in that: The step of determining the target cross-sectional dimensions comprises: Get pre-built cross-section scale engineering quantity comparison tables; Query the cross-section scale engineering quantity comparison table to obtain the engineering cost corresponding to each group of cross-section scales in the cross-section scales to be selected; The candidate section scale corresponding to the minimum engineering cost is determined as the target section scale.

8. A device for determining the cross section of a canal channel based on the speed of a ship, characterized in that: include: A first calculation unit determines a surplus water depth range and a draft of the target ship based on the ship tonnage and ship type of the target ship, and calculates a minimum water depth of the channel corresponding to the target ship, wherein the surplus water depth range refers to a margin value for ensuring that the target ship can safely navigate without touching the riverbed; A second calculation unit calculates a minimum width of a channel corresponding to the target ship based on the total width and total length of the target ship; A third calculation unit calculates the channel cross-sectional width at different ship speeds and different water depths based on the ship speed range of the target ship, wherein the ship speed is within the ship speed range and the water depth is not less than the minimum water depth of the channel; A determination unit is used to determine the ship speed, water depth and channel cross-sectional width used to calculate the channel cross-sectional width as candidate cross-sectional scales when the channel cross-sectional width is not less than the minimum channel width, determine the target cross-sectional scale among the candidate cross-sectional scales, and determine the canal channel cross-sectional scale based on the target cross-sectional scale.

9. An electronic device, characterized in that: It includes one or more processors and a memory, wherein the memory is used to store one or more programs, wherein when the one or more programs are executed by the one or more processors, the one or more processors implement the method for determining the canal channel section based on the ship speed as described in any one of claims 1 to 7.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method for determining the canal channel section based on the ship speed as described in any one of claims 1 to 7 are implemented.

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