A type of cargo ship line spectrum for the middle and lower reaches of the Yangtze River and its application

Abstract

The present invention belongs to the technical field of hull line design of river vessels, and discloses a line spectrum of cargo ships in the middle and lower reaches of the Yangtze River and its application. The present invention mainly includes three parts: first, this line spectrum is applicable to ship types and various main scale structural parameters and parameter ranges; second, the main parameters of the optimal hull line (buoyancy center ordinate XCB, tail axis spacing b / B, tail fin inner fatness inskeg_b, invisible bulb bow waterline width contraction ratio ydwl_ratio) under different square coefficients change curves with the main scale parameters L / B, B / T and the use method of this line spectrum; third, the method for rapid prediction of actual ship resistance when using the above-mentioned line spectrum for line design. The present invention is of great significance to the standardization and serialization of the line of straight bow + double tail fin cargo ships in the middle and lower reaches of the Yangtze River, and can quickly provide performance reference data in ship design and subsequent power design configuration.

Description

Technical Field

[0001] The invention belongs to the technical field of inland river vessel hull line design, and in particular relates to a line spectrum of cargo ships in the middle and lower reaches of the Yangtze River and its application. Background Art

[0002] In recent years, my country's inland shipping has continued to develop, the level of waterways has been continuously improved, the cargo throughput of ports along the Yangtze River has repeatedly set new records, the continuous advancement of the construction of the "Yangtze River Economic Belt" and the increasing emphasis on green and intelligent concepts have put forward higher requirements for the design of new inland river ships.

[0003] However, at present, there are many types of inland river ships in my country, most of which are too old and have uneven performance. The old ship types are obviously unable to meet the current development needs. The traditional design method is usually based on the accumulated design experience of designers, through redesigning the existing parent ship lines, and meeting some new basic design requirements through tedious continuous transformation. This makes it difficult to build a standardized system for the newly designed ship lines, and it also cannot guarantee that the new ship type will have excellent performance. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention provides a line spectrum of cargo ships in the middle and lower reaches of the Yangtze River and its application.

[0005] The present invention is implemented as follows: a spectrum of cargo ship types in the middle and lower reaches of the Yangtze River and an application method thereof, including: a ship type scale series, a ship type parameter spectrum curve, and a rapid prediction of actual ship resistance.

[0006] Furthermore, the ship scale series is based on the preliminary classification of the Yangtze River bulk carriers, container ships, hazardous chemicals ships, river-sea direct ships, passenger ships, etc.; and a multi-objective comprehensive demonstration of each spectrum of ships under different market demands and different navigation environments, and a main scale series of the main green and intelligent ship types on the Yangtze River is proposed.

[0007] Furthermore, the ship scale series can provide a recommended overall length range and a recommended scale ratio range according to different tonnages and navigation areas of ships.

[0008] Furthermore, the ship parameter spectrum curve is constructed by analyzing the typical characteristics of this type of straight bow + double skeg cargo ship in the middle and lower reaches of the Yangtze River, and a matching full-parameterized model is constructed. The main ship parameters at each scale are analyzed by using hydrodynamic calculation methods, approximate models and multi-objective optimization algorithms, and the spectrum curve of the main parameters of the optimal hull line (the buoyancy center longitudinal coordinate XCB, the tail axis spacing b / B, the inner fatness of the skeg inskeg_b, the invisible bulbous bow waterline width contraction ratio ydwl_ratio) with the main scale parameters L / B and B / T under different square coefficients is obtained; then, based on the spectrum curve and combined with the overall ship design process, the intelligent reasoning method is used to obtain the optimal parameters of the target ship type, and then it is introduced into the parametric model to obtain a three-dimensional hull model.

[0009] Furthermore, the rapid prediction of the actual ship resistance utilizes experimental design to construct a sample set of main scale parameters of this type of ship, and adopts the full viscous flow hydrodynamic calculation method to obtain the resistance results of each sample ship; then, the kriging method is used to construct an approximate model of the main scale parameters regarding the residual resistance coefficient and the wet surface area of ​​the hull based on the existing sample ship data, and the prediction accuracy is verified; finally, the approximate model and the two-dimensional conversion method are used to perform a rapid prediction of the actual ship resistance for different ship types in each scale series.

[0010] Another object of the present invention is to provide a Yangtze River middle and lower reaches cargo ship type line spectrum and its application system for implementing the Yangtze River middle and lower reaches cargo ship type line spectrum and its application method, the system comprising:

[0011] The ship type scale module is used to classify the Yangtze River bulk carriers, container ships, hazardous chemical ships, river-to-sea direct ships, passenger ships, etc. in the early stage; and to conduct multi-objective comprehensive demonstration of ships of each spectrum under different market demands and different navigation environments, and propose the main scale series of the main green and intelligent ship types on the Yangtze River.

[0012] The ship type parameter pedigree curve module is used to analyze the typical characteristics of this type of straight bow + double skeg cargo ship in the middle and lower reaches of the Yangtze River, build a supporting full-parameterized model, and use hydrodynamic calculation methods, approximate models and multi-objective optimization algorithms to analyze the main ship type parameters at various scales to obtain the pedigree curves of the main parameters of the optimal hull line (central buoyancy coordinate XCB, tail axis spacing b / B, inner fatness of the skeg_b, invisible bulb bow waterline width contraction ratio ydwl_ratio) with the main scale parameters L / B and B / T under different square coefficients; then, based on the pedigree curve and combined with the overall ship design process, the intelligent reasoning method is used to obtain the optimal parameters of the target ship type, and then it is introduced into the parametric model to obtain a three-dimensional hull model;

[0013] The module for rapid prediction of real ship resistance is used to construct a sample set of main scale parameters of this type of ship by experimental design, and obtain the resistance results of each sample ship by adopting the full viscous flow hydrodynamic calculation method; then, the kriging method is used to construct an approximate model of the main scale parameters about the residual resistance coefficient and the wet surface area of ​​the hull based on the existing sample ship data, and the prediction accuracy is verified; finally, the approximate model and two-dimensional conversion method are used to quickly predict the real ship resistance of different ship types under each scale series.

[0014] Another object of the present invention is to provide a computer device, which includes a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor executes the steps of the cargo ship line spectrum in the middle and lower reaches of the Yangtze River and its application method.

[0015] Another object of the present invention is to provide a computer-readable storage medium storing a computer program, which, when executed by a processor, enables the processor to execute the steps of the spectrum of cargo ship types in the middle and lower reaches of the Yangtze River and its application method.

[0016] Another object of the present invention is to provide an information data processing terminal, which is used to implement the cargo ship type line spectrum and its application system in the middle and lower reaches of the Yangtze River.

[0017] In combination with the above technical solutions and the technical problems solved, please analyze the advantages and positive effects of the technical solutions to be protected by the present invention from the following aspects:

[0018] First, the present invention constructs a line spectrum of cargo ships in the middle and lower reaches of the Yangtze River, serving the design and development of the line of straight bow + double skeg cargo ships in the middle and lower reaches of the Yangtze River. Through the use of the line spectrum, a hull model with excellent performance can be quickly obtained according to user needs, and a rapid performance evaluation can be performed on it, which has good engineering application value. The present invention is of great significance to the standardization and serialization of the line of straight bow + double skeg cargo ships in the middle and lower reaches of the Yangtze River, and can quickly provide performance reference data in ship design and subsequent power design configuration.

[0019] Second, the present invention effectively solves the problem that there are many styles of inland river ships in my country, they are generally too old, and their performance varies. The old ship types obviously cannot meet the current development needs. The traditional design method usually requires designers to redesign the existing mother ship type lines based on their accumulated design experience, and meet some new basic design requirements through tedious continuous transformation. This makes it difficult to build a standardized system for the newly designed ship type lines, and it is also impossible to guarantee that the new ship type will have excellent performance. Through the use of the line spectrum, a hull model with excellent performance can be quickly obtained according to user needs, and its performance can be quickly evaluated, which has good engineering application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a flow chart of a cargo ship type line spectrum in the middle and lower reaches of the Yangtze River and its application method provided by an embodiment of the present invention;

[0021] Figure 2 The present invention provides a rapid prediction process of the actual ship resistance of a green and intelligent straight-bow + double-tail fin cargo ship in the middle and lower reaches of the Yangtze River;

[0022] Figure 3 It is a Cb=0.82 type line spectrum curve provided by an embodiment of the present invention;

[0023] Figure 4 It is a Cb=0.84 type line spectrum provided by an embodiment of the present invention;

[0024] Figure 5 It is a Cb=0.86 type line spectrum provided by an embodiment of the present invention;

[0025] Figure 6 It is a Cb=0.88 type line spectrum provided by an embodiment of the present invention;

[0026] Figure 7 It is a Cb=0.90 type line spectrum provided by an embodiment of the present invention;

[0027] Figure 8 It is a schematic diagram of an application method of a straight-bow-double-tail-fin cargo ship atlas interpolation in the middle and lower reaches of the Yangtze River provided by an embodiment of the present invention;

[0028] Fig. 9 is a schematic diagram of interpolation application of parameter XCB when the square coefficient is 0.82 provided in an embodiment of the present invention;

[0029] Fig.10 is a schematic diagram of interpolation application of parameter XCB when the square coefficient is 0.84 provided in an embodiment of the present invention;

[0030] Fig.11 is a schematic diagram of interpolation application of parameter inskegy_b when the square coefficient is 0.82 provided in an embodiment of the present invention;

[0031] Fig.12 is a schematic diagram of interpolation application of parameter inskegy_b when the square coefficient is 0.84 provided in an embodiment of the present invention;

[0032] Fig.13 is a schematic diagram of interpolation application of the parameter ydwl_ratio when the square coefficient is 0.82 provided in an embodiment of the present invention;

[0033] Fig.14is a schematic diagram of interpolation application of parameter b / B when the square coefficient is 0.82 provided by an embodiment of the present invention;

[0034] Fig.15 is a schematic diagram of interpolation application of parameter b / B when the square coefficient is 0.84 provided in an embodiment of the present invention;

[0035] Fig.16 It is a three-dimensional image of the hull surface of a straight bow + double skeg fin cargo ship obtained by interpolation design provided in an embodiment of the present invention;

[0036] Fig.17 It is a three-dimensional image of the hull surface of a straight bow + double skeg fin cargo ship obtained by interpolation design provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0038] 1. Explanatory Examples In order to enable those skilled in the art to fully understand how to implement the present invention, this section provides an illustrative example that expands and describes the technical solution of the claims.

[0039] like Figure 1 As shown, an embodiment of the present invention provides a spectrum of cargo ship types in the middle and lower reaches of the Yangtze River and an application method thereof, including: a ship type scale series, a ship type parameter spectrum curve, and a rapid prediction of actual ship resistance.

[0040] The rapid prediction process of the actual ship resistance of the green and intelligent straight bow + double skeg cargo ship in the middle and lower reaches of the Yangtze River is as shown in the attached Figure 2 For the user of the present invention, it is necessary to firstly conduct a preliminary analysis of the navigation area requirements, displacement requirements, cargo capacity requirements, speed requirements, etc. in the ship design task book, match the scale series according to the first part of the content of the present invention, find the applicable scale series range, and preliminarily determine the optimal main scale and box coefficient CB and speed of the target ship type.

[0041] The present invention classifies the main green and intelligent cargo ship types on the Yangtze River, such as bulk carriers, container ships, and hazardous chemical ships, into pedigree categories based on the different cargo / passenger market demand positioning of different ship types, from the perspectives of sailing distance, tonnage, energy form, green grade, and intelligence level.

[0042] According to the classification of main ship type spectrum categories, on the basis of the conceptual design research of the iconic cargo ship type of the Yangtze River green smart ship, the influence of the main ship type parameters of the Yangtze River green smart ship on the ship performance is further analyzed; with different cargo capacity / container capacity / passenger capacity of ships as the main scale expansion surface, and different ship scale ratios as the scale expansion direction, the scale expansion range of the main Yangtze River green smart ship types is constructed, and the subsequent main scale demonstration of the ship type is carried out within the expansion range.

[0043] Taking into account different routes, different channel conditions, different market demands and different implementation stages of green intelligent technology, under the different category spectrum of the main green intelligent ship types on the Yangtze River, the influence of ship scales of different types of ships on the technical and economic evaluation indicators of ships is analyzed, and the theoretical optimization algorithm and multi-criteria decision-making method are used to optimize the main scales of each ship type feasible scheme, and the main scale series of the Yangtze River green intelligent cargo ship types is obtained.

[0044] Table 1 Yangtze River Green Intelligent Bulk Carrier Scale Series

[0045]

[0046] Table 2 Yangtze River Green Intelligent Hazardous Chemicals Ship Scale Series

[0047]

[0048] Table 3 Yangtze River Green Intelligent Inland Container Ship Scale Series

[0049]

[0050]

[0051] The present invention provides a line spectrum of a Yangtze River green intelligent mid- and lower-stream straight bow + double skeg fin cargo ship, the expression form of which is the curve of the main parameters of the optimal hull line (buoyancy center ordinate XCB, tail axis spacing b / B, skeg inskeg_b, invisible bulb bow waterline width contraction ratio ydwl_ratio) with L / B and B / T under different square coefficients. Figure 3-Figure 7 As shown, it is the curve of spectrum parameter change under different square coefficients CB.

[0052] The present invention provides a method for quickly predicting the resistance of a real ship of a straight-bow + double-tail fin cargo ship in the middle and lower reaches of the Yangtze River. The steps of constructing a real ship resistance prediction module mainly include three parts: first, using experimental design to construct a sample set of main scale parameters of this type of ship, and using a full viscous flow hydrodynamic calculation method to obtain the resistance results of each sample ship; second, using the kriging method to construct an approximate model of the main scale parameters about the residual resistance coefficient and the wet surface area of ​​the hull according to the existing sample ship data, and verifying the prediction accuracy; finally, using the approximate model and the two-dimensional conversion method, the real ship resistance of different ship types under each scale series is quickly predicted.

[0053] For the ship type element scheme with determined L, B, T, and Cb, the following interpolation model is used to generate the optimized ship type scheme. The interpolation flow chart is as follows: Figure 8 shown.

[0054] ① Select two adjacent Cb (Cb1 and Cb2) for interpolation: For Cb1, first determine the actual B / T and L / B of the ship according to the main scale elements given by the user, select two adjacent L / B in the atlas of straight bow-double skeg cargo ships in the middle and lower reaches of the Yangtze River, and obtain two sets of parameter values ​​by looking up the map: XCB1, inskegy_b1 and ydwl_ratio1 and XCB2, inskegy_b2 and ydwl_ratio2;

[0055] ② Then interpolate the parameter values ​​XCB3, inskegy_b3 and ydwl_ratio3 corresponding to the square coefficient according to the actual L / B value;

[0056] ③ Similarly, for Cb2, three parameter values ​​XCB4, inskegy_b4 and ydwl_ratio4 are obtained according to the actual L / B interpolation;

[0057] ④Finally, the actual XCB is obtained by interpolation based on XCB3 and XCB4, the actual inskegy_b is obtained by interpolation based on inskegy_b3 and inskegy_b4, and the actual ydwl_ratio is obtained by interpolation based on ydwl_ratio3 and ydwl_ratio4.

[0058] (2) Interpolation application examples

[0059] The following will introduce in detail the interpolation of the three parameters XCB, inskegy_b and ydwl_ratio based on the interpolation application method of the straight-bow-double-tail-fin cargo ship atlas in the middle and lower reaches of the Yangtze River (the main factors of the designed ship: Lpp=114m, B=22, T=6, CB=0.83, and a simple calculation shows L / B=5.182, B / T=3.67, Cb=0.83).

[0060] (2.1) Interpolation application of local parameters

[0061] 1) Interpolation application of parameter XCB, such as Fig. 9 shown.

[0062] The block coefficient of the designed ship is Cb=0.83, which is between 0.82 and 0.84, so two adjacent Cbs are selected (Cbl=0.82 and Cb2=0.84); the designed ship L / B=5.182, which is between 5 and 6, so two adjacent L / Bs are selected during interpolation (L / B1=5 and L / B2=5.5).

[0063] ① For Cb1=0.82, according to the cargo ship chart of XCB, the XCB values ​​corresponding to L / B1=5 and L / B2=5.5 are read at the horizontal coordinate B / T=3.67, which are XCB1=0.0105 and XCB2=0.0115.

[0064] According to the actual L / B=5.182, linear interpolation is performed on the parameter XCB to obtain the value XCB3 of the parameter XCB corresponding to Cb=0.82, L / B=5.182 and B / T=3.67.

[0065] The linear interpolation formula is as follows:

[0066]

[0067] Wherein, x represents L / B, y represents XCB, x0, x1 correspond to L / B1=5 and L / B2=5.5, y0, y1 correspond to XCB1=0.0105 and XCB2=0.0115. Therefore, XCB3=0.010864 is obtained by interpolation based on formula (5-1).

[0068] ② For Cb2=0.84, according to the cargo ship chart of XCB, the XCB values ​​corresponding to L / B1=5 and L / B2=5.5 are read at the horizontal coordinate B / T=3.67, which are XCB1=0.0085 and XCB2=0.0088.

[0069] According to the actual L / B=5.182, linear interpolation of parameter XCB is performed according to formula (5-1), and the value of parameter XCB corresponding to Cb=0.84, L / B=5.182 and B / T=3.67 can be obtained as XCB4=0.00861. Fig.10 shown.

[0070] ③ Based on XCB3 obtained in step ① and XCB4 obtained in step ②, linear interpolation is performed on the parameter XCB corresponding to Cb=0.83, L / B=5.182 and B / T=3.67 according to formula (5-1), and XCB=0.00974 is obtained.

[0071] 2) Interpolation application of parameter inskegy_b

[0072] The interpolation application of parameter inskegy_b is similar to the interpolation method of parameter XCB, which is briefly described below.

[0073] ① For Cb1=0.82, according to the cargo ship chart of inskegy_b, the values ​​of inskegy_b corresponding to L / B1=5 and L / B2=5.5 are read at the horizontal coordinate B / T=3.67, which are inskegy_b1=0.557 and inskegy_b2=0.575.

[0074] According to the actual L / B=5.182, linear interpolation of parameter inskegy_b can be performed to obtain the value of parameter inskegy_b3=0.5636 corresponding to Cb=0.82, L / B=5.182 and B / T=3.67. Fig.11 shown.

[0075] ② For Cb2=0.84, according to the cargo ship chart of inskegy_b, the values ​​of inskegy_b corresponding to L / B1=5 and L / B2=5.5 are read at the horizontal coordinate B / T=3.67, which are inskegy_b1=0.615 and inskegy_b2=0.572.

[0076] According to the actual L / B=5.182, linear interpolation of the parameter inskegy_b is performed according to formula (5-1), and the value of the parameter inskegy_b corresponding to Cb=0.84, L / B=5.182 and B / T=3.67 can be obtained as inskegy_b4=0.59935.

[0077] ③ Based on inskegy_b3 obtained in step ① and inskegy_b4 obtained in step ②, linear interpolation is performed on the parameter inskegy_b corresponding to Cb=0.83, L / B=5.182 and B / T=3.67 according to formula (5-1), and inskegy_b=0.5815 is obtained. Fig.12 shown.

[0078] 3) Interpolation application of parameter ydwl_ratio

[0079] The interpolation application of the parameter ydwl_ratio is similar to the interpolation method of the parameters XCB and inskegy_b, which is briefly described below.

[0080] ① For Cb1=0.82, according to the cargo ship chart of ydwl_ratio, the values ​​of inskegy_b corresponding to L / B1=5 and L / B2=5.5 are read at the horizontal coordinate B / T=3.67, which are ydwl_ratio1=0.967 and ydwl_ratio2=0.941.

[0081] According to the actual L / B=5.182, linear interpolation of the parameter ydwl_ratio can be performed to obtain the value of the parameter ydwl_ratio3=0.9575 corresponding to Cb=0.82, L / B=5.182 and B / T=3.67. Fig.13 shown.

[0082] ② For Cb2=0.84, according to the cargo ship chart of ydwl_ratio, the values ​​of ydwl_ratio corresponding to L / B1=5 and L / B2=5.5 are read at the horizontal coordinate B / T=3.67, which are ydwl_ratio1=0.9105 and ydwl_ratio2=0.918.

[0083] According to the actual L / B=5.182, linear interpolation of the parameter ydwl_ratio is performed according to formula (5-1), and the value of the parameter ydwl_ratio corresponding to Cb=0.84, L / B=5.182 and B / T=3.67, ydwl_ratio4=0.913, can be obtained. Fig.14 shown.

[0084] ③ Based on ydwl_ratio3 obtained in step ① and ydwl_ratio4 obtained in step ②, linear interpolation is performed on the parameter ydwl_ratio corresponding to Cb=0.83, L / B=5.182 and B / T=3.67 according to formula (5-1) to obtain ydwl_ratio=0.935.

[0085] 4) For the parameter b / B, interpolation is performed in the same manner as above.

[0086] ① For Cb1=0.82, according to the b / B cargo ship chart, the b / B values ​​corresponding to L / B1=5 and L / B2=5.5 are read at the horizontal coordinate B / T=3.67, which are b / B1=0.504 and b / B2=0.515.

[0087] According to the actual L / B=5.182, linear interpolation of parameter b / B can be performed to obtain the value of parameter b / B corresponding to Cb=0.82, L / B=5.182 and B / T=3.67, b / B3=0.508. Fig.15 shown.

[0088] ② For Cb2=0.84, according to the b / B cargo ship chart, the b / B values ​​corresponding to L / B1=5 and L / B2=5.5 are read at the horizontal coordinate B / T=3.67, which are b / B1=0.512 and b / B2=0.519.

[0089] According to the actual L / B=5.182, linear interpolation of parameter b / B according to formula (5-1) can obtain the value of parameter b / B corresponding to Cb=0.84, L / B=5.182 and B / T=3.67, b / B4=0.5146. Fig.16 shown.

[0090] ③ Based on b / B3 obtained in step ① and b / B4 obtained in step ②, perform linear interpolation on the parameter b / B corresponding to Cb=0.83, L / B=5.182 and B / T=3.67 according to formula (5-1) to obtain b / B=0.5113.

[0091] (2.2) Ship design scheme generation

[0092] The parameters h / T and area_ratio take the initial values, i.e. h / T = 0.298, area_ratio = 0.812. Adding the interpolation of the parameters XCB, inskegy_b, ydwl_ratio and b / B obtained from the line spectrum of cargo ships in the middle and lower reaches of the Yangtze River, the ship type scheme corresponding to the design ship (Lpp = 114m, B = 22, T = 6, CB = 0.83) can be finally interpolated, as shown in the following table:

[0093] Table 5 Design ship type plan

[0094]

[0095] Based on the values ​​of the above parameters, the corresponding ship type can be generated in CAESES software, and its 3D diagram is as follows Fig.17 shown.

[0096] We need to further predict the hull resistance for the generated model scheme to provide a reference for the subsequent propulsion scheme design. The prediction process is as follows: Figure 2 As shown, the specific steps are as follows:

[0097] First of all, the user needs to input the L, B, T, CB, and Fn of the required ship type when generating the scheme in the previous step. In addition, we have obtained the longitudinal position XCB of the center of buoyancy of the ship type scheme and some other local parameters when generating the line scheme. Therefore, the basic shape of the ship type scheme has been determined, so its resistance performance has also been determined, and the basis for resistance estimation has been established.

[0098] When using the two-dimensional method to convert the actual ship resistance, as shown in Formula 1, we need to obtain the ship's wet surface area, friction resistance coefficient, residual resistance coefficient and roughness compensation coefficient to obtain the final actual ship resistance. Among them, the wet surface area and residual resistance coefficient can be predicted by the main scale parameter approximation model constructed above, and the roughness compensation coefficient can be a fixed value or input by the user within this scale range. The friction resistance coefficient is obtained as shown in Formula 2, where RE is the Reynolds number, and its calculation method is shown in Formula 3, where the waterline length and speed are obtained by the user input when the line plan is generated in the second step, and the water body density, viscosity coefficient, and scale ratio are all fixed values.

[0099] 2. Application Examples: In order to prove the creativity and technical value of the technical solution of the present invention, this section provides application examples of the technical solution of the claims on specific products or related technologies.

[0100] The embodiment of the present invention provides a Yangtze River middle and lower reaches cargo ship type line spectrum and its application system for implementing the Yangtze River middle and lower reaches cargo ship type line spectrum and its application method, the system comprising:

[0101] The ship type scale module is used to classify the Yangtze River bulk carriers, container ships, hazardous chemical ships, river-to-sea direct ships, passenger ships, etc. in the early stage; and to conduct multi-objective comprehensive demonstration of ships of each spectrum under different market demands and different navigation environments, and propose the main scale series of the main green and intelligent ship types on the Yangtze River.

[0102] The ship type parameter pedigree curve module is used to analyze the typical characteristics of this type of straight bow + double skeg cargo ship in the middle and lower reaches of the Yangtze River, build a supporting full-parameterized model, and use hydrodynamic calculation methods, approximate models and multi-objective optimization algorithms to analyze the main ship type parameters at various scales to obtain the pedigree curves of the main parameters of the optimal hull line (central buoyancy coordinate XCB, tail axis spacing b / B, inner fatness of the skeg_b, invisible bulb bow waterline width contraction ratio ydwl_ratio) with the main scale parameters L / B and B / T under different square coefficients; then, based on the pedigree curve and combined with the overall ship design process, the intelligent reasoning method is used to obtain the optimal parameters of the target ship type, and then it is introduced into the parametric model to obtain a three-dimensional hull model;

[0103] The module for rapid prediction of real ship resistance is used to construct a sample set of main scale parameters of this type of ship by experimental design, and obtain the resistance results of each sample ship by adopting the full viscous flow hydrodynamic calculation method; then, the kriging method is used to construct an approximate model of the main scale parameters about the residual resistance coefficient and the wet surface area of ​​the hull based on the existing sample ship data, and the prediction accuracy is verified; finally, the approximate model and two-dimensional conversion method are used to quickly predict the real ship resistance of different ship types under each scale series.

[0104] An embodiment of the present invention provides a computer device, which includes a memory and a processor. The memory stores a computer program. When the computer program is executed by the processor, the processor executes the steps of the cargo ship line spectrum in the middle and lower reaches of the Yangtze River and the application method thereof.

[0105] An embodiment of the present invention provides a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, the processor executes the steps of the Yangtze River middle and lower reaches cargo ship line spectrum and its application method.

[0106] An embodiment of the present invention provides an information data processing terminal, which is used to implement the cargo ship type line spectrum in the middle and lower reaches of the Yangtze River and its application system.

[0107] It should be noted that the embodiments of the present invention can be implemented by hardware, software, or a combination of software and hardware. The hardware part can be implemented using dedicated logic; the software part can be stored in a memory and executed by an appropriate instruction execution system, such as a microprocessor or dedicated design hardware. It can be understood by a person of ordinary skill in the art that the above-mentioned devices and methods can be implemented using computer executable instructions and / or contained in a processor control code, such as a carrier medium such as a disk, CD or DVD-ROM, a programmable memory such as a read-only memory (firmware), or a data carrier such as an optical or electronic signal carrier. Such code is provided on the carrier medium. The device and its modules of the present invention can be implemented by hardware circuits such as very large-scale integrated circuits or gate arrays, semiconductors such as logic chips, transistors, etc., or programmable hardware devices such as field programmable gate arrays, programmable logic devices, etc., can also be implemented by software executed by various types of processors, and can also be implemented by a combination of the above-mentioned hardware circuits and software, such as firmware.

[0108] 3. Evidence of the effects of the embodiments. The embodiments of the present invention have achieved some positive effects during the development or use process, and indeed have great advantages over the prior art. The following content is described in conjunction with the data, charts, etc. of the test process.

[0109] The ××× method provided by the embodiment of the present invention

[0110] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any modification, equivalent substitution and improvement made by any technician familiar with the technical field within the technical scope disclosed by the present invention and within the spirit and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A method for applying the line spectrum of cargo ships in the middle and lower reaches of the Yangtze River, characterized in that: include: Ship scale series, ship parameter spectrum curve, and rapid prediction of actual ship resistance; The ship type parameter pedigree curve is constructed by analyzing the typical characteristics of the straight bow + double skeg fin cargo ship in the middle and lower reaches of the Yangtze River, and a matching full parameterized model is constructed. The main ship type parameters at various scales are analyzed by using hydrodynamic calculation methods, approximate models and multi-objective optimization algorithms, and the main parameters of the optimal hull line under different square coefficients are obtained, including the buoyancy center longitudinal coordinate XCB, the tail axis spacing b / B, the inner fatness of the skeg fin inskeg_b, and the shrinkage ratio of the invisible bulbous bow waterline width ydwl_ratio, and the pedigree curve with the change of the main scale parameters L / B and B / T; then, based on the pedigree curve and combined with the overall ship design process, the intelligent reasoning method is used to obtain the optimal parameters of the target ship type, and then it is introduced into the parameterized model to obtain a three-dimensional hull model; The proposed rapid prediction of real ship resistance utilizes experimental design to construct a sample set of main scale parameters of the type of ship, and adopts a full viscous flow hydrodynamic calculation method to obtain the resistance results of each sample ship; then, the kriging method is used to construct an approximate model of the main scale parameters with respect to the residual resistance coefficient and the wet surface area of ​​the hull based on the existing sample ship data, and the prediction accuracy is verified; finally, the approximate model and the two-dimensional conversion method are used to perform rapid prediction of real ship resistance for different ship types under each scale series.

2. The method for applying the line spectrum of cargo ships in the middle and lower reaches of the Yangtze River as claimed in claim 1, characterized in that: The ship scale series is based on the preliminary classification of the Yangtze River bulk carriers, container ships, hazardous chemicals ships, river-sea direct ships, passenger ships, etc.; and a multi-objective comprehensive demonstration of each spectrum of ships under different market demands and different navigation environments is carried out, and the main scale series of the main green and intelligent ship types on the Yangtze River is proposed.

3. The method for applying the line spectrum of cargo ships in the middle and lower reaches of the Yangtze River as claimed in claim 1 is characterized in that: The ship scale series provides a recommended overall length range and a recommended scale ratio range according to different tonnages and navigation areas of ships.

4. A system for applying the line spectrum of cargo ships in the middle and lower reaches of the Yangtze River, which implements the method for applying the line spectrum of cargo ships in the middle and lower reaches of the Yangtze River as claimed in any one of claims 1 to 3, characterized in that: The system includes: The ship scale module is used to classify the Yangtze River bulk carriers, container ships, hazardous chemicals ships, river-to-sea ships, passenger ships, etc. in the early stage; and to conduct multi-objective comprehensive demonstration of each spectrum of ships under different market demands and different navigation environments, and propose the main scale series of the main green and intelligent ship types on the Yangtze River; The ship type parameter pedigree curve module is used to analyze the typical characteristics of this type of straight bow + double skeg cargo ship in the middle and lower reaches of the Yangtze River, build a supporting full-parameterized model, and use hydrodynamic calculation methods, approximate models and multi-objective optimization algorithms to analyze the main ship type parameters at various scales to obtain the main parameters of the optimal hull line under different square coefficients, including the buoyancy center longitudinal coordinate XCB, tail axis spacing b / B, skeg_b, invisible bulb bow waterline width shrinkage ratio ydwl_ratio, and the pedigree curve with the change of the main scale parameters L / B and B / T; then, based on the pedigree curve and combined with the overall ship design process, the intelligent reasoning method is used to obtain the optimal parameters of the target ship type, and then it is introduced into the parametric model to obtain the three-dimensional hull model; The module for rapid prediction of real ship resistance is used to construct a sample set of main scale parameters of this type of ship by experimental design, and obtain the resistance results of each sample ship by adopting the full viscous flow hydrodynamic calculation method; then, the kriging method is used to construct an approximate model of the main scale parameters about the residual resistance coefficient and the wet surface area of ​​the hull based on the existing sample ship data, and the prediction accuracy is verified; finally, the approximate model and two-dimensional conversion method are used to quickly predict the real ship resistance of different ship types under each scale series.

5. A computer device, characterized in that: The computer device includes a memory and a processor, the memory stores a computer program, and when the computer program is executed by the processor, the processor executes the steps of the method for applying the line spectrum of cargo ships in the middle and lower reaches of the Yangtze River as described in any one of claims 1-3.

6. A computer-readable storage medium storing a computer program, wherein when the computer program is executed by a processor, the processor executes the steps of the method for applying the line spectrum of cargo ships in the middle and lower reaches of the Yangtze River as described in any one of claims 1 to 3.

7. An information data processing terminal, characterized in that: The information data processing terminal is used to implement the cargo ship type spectrum application system in the middle and lower reaches of the Yangtze River as described in claim 4.

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