NL2032031B1 - Computer-implemented universal simulation software system for ship ballast water system, and simulation method - Google Patents
Computer-implemented universal simulation software system for ship ballast water system, and simulation method Download PDFInfo
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- NL2032031B1 NL2032031B1 NL2032031A NL2032031A NL2032031B1 NL 2032031 B1 NL2032031 B1 NL 2032031B1 NL 2032031 A NL2032031 A NL 2032031A NL 2032031 A NL2032031 A NL 2032031A NL 2032031 B1 NL2032031 B1 NL 2032031B1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 106
- 238000004088 simulation Methods 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000012544 monitoring process Methods 0.000 claims abstract description 16
- 238000002347 injection Methods 0.000 claims abstract description 4
- 239000007924 injection Substances 0.000 claims abstract description 4
- 230000002706 hydrostatic effect Effects 0.000 claims description 7
- 230000003993 interaction Effects 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 6
- 238000013178 mathematical model Methods 0.000 claims description 6
- 230000007246 mechanism Effects 0.000 claims description 5
- 238000005094 computer simulation Methods 0.000 claims description 4
- 238000000354 decomposition reaction Methods 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 3
- 238000013480 data collection Methods 0.000 claims description 2
- 238000005188 flotation Methods 0.000 abstract description 8
- 239000000243 solution Substances 0.000 abstract description 4
- 238000012549 training Methods 0.000 abstract description 2
- 238000012790 confirmation Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
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- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/13—Architectural design, e.g. computer-aided architectural design [CAAD] related to design of buildings, bridges, landscapes, production plants or roads
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B43/00—Improving safety of vessels, e.g. damage control, not otherwise provided for
- B63B43/02—Improving safety of vessels, e.g. damage control, not otherwise provided for reducing risk of capsizing or sinking
- B63B43/04—Improving safety of vessels, e.g. damage control, not otherwise provided for reducing risk of capsizing or sinking by improving stability
- B63B43/06—Improving safety of vessels, e.g. damage control, not otherwise provided for reducing risk of capsizing or sinking by improving stability using ballast tanks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B71/00—Designing vessels; Predicting their performance
- B63B71/10—Designing vessels; Predicting their performance using computer simulation, e.g. finite element method [FEM] or computational fluid dynamics [CFD]
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
- G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
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Abstract
The present invention provides a computer-implemented universal simulation software system for a ship ballast water system, and a simulation method. The universal 5 simulation software system includes a model generation module used for building a ship ballast water system simulation model; an operation and controlling module used for realizing injection and drainage of ship ballast water and allocating operation control; and a monitoring and display module used for displaying on-off states of a ballast pump and a pipeline valve in the ship ballast water system in real time, a flowing state of a 10 pipe network, a loading condition of a ship ballast water tank, and a ship flotation condition. The present invention can be used to simulate ballast water systems of different ships, which are convenient for personnel to perform ballast solution rehearsal and operation training on different ships.
Description
COMPUTER-IMPLEMENTED UNIVERSAL SIMULATION SOFTWARE
SYSTEM FOR SHIP BALLAST WATER SYSTEM, AND SIMULATION
METHOD
[01] The present invention belongs to the technical field of simulation, and in particular relates to a computer-implemented universal simulation software system for a ship ballast water system, and a simulation method.
[02] There are a large number of ballast water tanks for large ships, and there are also many load adjustment solutions which achieve the purpose. The advantages and disadvantages of this solution often affect the duration of load adjustment operation, the power consumption, the stress on a ship body, and the safety of the operation process.
[03] Simulation software systems for ship ballast water systems that have been published so far are all designed for specific ships. If the ship is replaced or the ballast water system is modified, a software system needs to be re-developed, increasing the development cycle and development cost. For this problem, this patent invented a computer-im plemented universal simulation software system and a method.
[04] The present invention aims to provide a universal software system for simulating ballast water systems of different ships, and a simulation method, which are convenient for personnel to perform ballast solution rehearsal and operation training on different ships. The technical problem that one set of simulation software is only specific to one ship is solved, the software development cycle can be shortened, and the development cost is reduced.
[05] A computer-implemented universal simulation software system for a ship ballast water system includes a model generation module, an operation and controlling module, and a monitoring and display module. The model generation module is used for building a ship ballast water system simulation model; achieving, on the basis of a memory of a simulation computer, generation and storage of a model database; building, through operation of a central processing unit, a mathematical model which satisfies a ship ballast water system operation mechanism and a control logic, thus representing a relationship among control, characteristics, and state parameters of the system; the operation and controlling module is used for realizing injection and drainage of ship ballast water and allocating operation control, is related to a simulation console, and achieves data collection and human-machine interaction through Input/Output (I/O) equipment which has a similar appearance to that of an operation panel of the ship ballast water system; and the monitoring and display module is used for displaying, through display terminal equipment, on-off states of a ballast pump and a pipeline valve in the ship ballast water system in real time, a flowing state of a pipe network, a loading condition of a ship ballast water tank, and a ship flotation condition.
[06] The model generation module includes a modeling guidance, a model database, and GDI+ graph drawing. A parametric modeling method based on a pipe network finite element method is adopted to parameterize various information in a pipeline system and store it in the form of a database. Controls used to simulate a ballast pump, a pipeline valve, a ballast water tank, and pipe network connection are dynamically created according to different ship ballast systems by using a GDI+ graph programming technology. The ballast water system of any ship can be simulated. The software system is installed on the simulation computer, and the generated model database is stored in the memory of the computer.
[07] The operation and controlling module includes turn-on, turn-oft, and opening degree operation control of the ballast pump and the pipeline valve. The I/O equipment of the simulation console performs human-machine interaction with the simulation computer. An operation processing system of the simulation computer solves a built pipe network finite element model, thus achieving the universality of the control logic.
[08] The monitoring and display module includes monitoring and displaying of ballast system control information, ballast water tank information, and ship flotation condition information. Each monitoring control is dynamically established according to different ship ballast water system, so that the universality of monitoring is achieved through the display terminal equipment.
[09] A simulation method using the above universal simulation software system for the ship ballast water system includes the following steps:
[10] step 1, decomposing, on the basis of a finite element method, a ship ballast water system to be simulated, and determining the serial numbers, the quantities, and connection relationships of pipe elements and nodes; [ll] step 2, inputting ship ballast water system simulation model information: initiating the universal simulation system, and gradually inputting, on the basis of the data obtained by decomposition in the step 1, simulation model data by means of a ship ballast water system modeling guidance, including initialization data, ballast water tank data, pipe element data, node data, tank capacity, and hydrostatic data;
[12] step 3, generating a ship ballast water system simulation model database: generating, on the basis of the data input at the step 2, a database named after the name of the ship, including an initialization data sheet, a ballast water tank data sheet, a pipe element data sheet, a node data sheet, a ballast water tank capacity data sheet, and a hydrostatic data sheet;
[13] step 4, performing GDI+ graph drawing on the ship ballast water system simulation model: reading information of the database in step 3, drawing a GDI+ graph of the ship ballast water system simulation model, and generating a human-machine interaction interface, including drawing of a ballast pump control, drawing of as valve control, drawing of a ballast water tank control, drawing of a water suction inlet control, drawing of a drainage opening control, and drawing of a ballast pipeline;
[14] step 5, operating and controlling the ship ballast water system simulation model: on the basis of the finite element method, building a mathematical model satisfying an operation mechanism and a control logic of the input ship ballast water system; a user can control turn-on, turn-off, and opening degree operation of the ballast pump and valve controls in the ship ballast water system simulation model; the system determine a pipeline logic according to a working state of each ballast pump and pipeline valve, and calculates a flow rate of each section of pipeline and changes of a liquid level of each ballast tank in real time;
[15] step 6, monitoring and displaying the ship ballast water system simulation model, including monitoring and displaying the ballast system control information, the ballast water tank information, and the ship flotation condition information; the user can observe the on states of each ballast pump and each pipeline valve, a flowing state of the pipeline, a water volume, a liquid level height and a loading rate of the ballast water tank, ship's fore and aft draft, and vertical and horizontal inclination angles.
[16] Beneficial effects: In the present invention, the computer-implemented universal simulation software system for the ship ballast water system is constructed; a simulation method for a ship ballast water system parameterization model is built on the basis of the finite element method; and the ballast water systems of different ships can be simulated in the same software system, thus improving the software development efficiency and reducing the development cost.
[17] FIG. 1 is an architecture diagram of a universal simulation software system for a ship ballast water system; and
[18] FIG. 21s a flowchart of parametric modeling of a ship ballast water system.
[19] The present invention will be further described below in conjunction with FIGS. 12.
[20] A computer-implemented universal simulation software system for a ship ballast water system includes a model generation module used for building a ship ballast water system simulation model; an operation and controlling module used for realizing injection and drainage of ship ballast water and allocating operation control; and a monitoring and display module used for displaying on-off states of a ballast pump and a pipeline valve in the ship ballast water system in real time, a flowing state of a pipe network, a loading condition of a ship ballast water tank, and a ship flotation condition.
[21] The whole system takes a simulation computer as a core. Building of a ship 5 ballast water system simulation model and a human-machine interaction interface are achieved by virtue of C#. A user performs finite element decomposition on the ship ballast water system and inputs model information by means of a moldeling guidance.
The simulation system generates a model database according to the input data information and dynamically creates respective controls of a ballast pump, a pipeline valve, a ballast water tank, and pipe network connection. In the process that the user operates and controls the ballast pump and valve controls through I/O equipment of a simulation console, the simulation system uses the built mathematical model to solve a flow rate of the ship ballast water system and a flotation condition of a ship and displays calculation results by means of display terminal equipment of the monitoring and display module. The universal simulation software system for the ship ballast water system can be used for simulating the ballast water systems of different ships, thus improving the simulation modeling efficiency.
[22] In order to verify the validness and effect of the method of the present invention, a further illustration is made. This example includes the following specific steps:
[23] 1. A ship ballast water system to be simulated 1s decomposed on the basis of a finite element method, and the serial numbers, the quantities, and connection relationships of pipe elements and nodes are determined.
[24] 2. Information of a ship ballast water system simulation model is input, and a database is generated. The universal simulation system is initiated, and a ship ballast water system modeling guidance is activated.
[25] (1) Initialization data is input. (I) The name of the ship is used as a project name. 2) The length of the ship, the width of the ship, and 4) the moulded depth are used for the flotation condition of the ship. ©) The quantity of pipe elements of the ballast water system, ©) the quantity of nodes, (7) the quantity of ballast water tanks,
© the quantity of ballast pumps, © the quantity of valves, (0 the quantity of water suction inlets, and (11) the quantity of drainage are used for initializing a model variable space. (12) The window width and (3) the window height are used for defining a window range displayed on an operation and monitoring interface. After the creation of a project is confirmed, the system generates an MDB database named after the name of the ship and creates a data sheet named TO InitialData in the database to store the initialization data information.
[26] (2) Ballast water tank information is input, including (1 the serial number and (2) the name of each ballast water tank. The system checks the completeness of the input information according to the initialized quantity of ballast water tanks, and creates, after confirmation, a data sheet named T1 BWTank in the database described in (1) to store the ballast water tank information.
[27] (3) Pipe element information is input. (I) The serial number of each pipe element, 2 the type (including three types, i.e, a pump-containing pipe element, a valve-containing pipe element, and a light pipe), ©) the serial number of Node A and (4) the serial number of Node B at both ends of the pipe element, and ©) the valve type of the valve-containing pipe element are used for modeling the pipe element in the simulation model. The system checks the completeness of the input information according to the quantity of initialized pipe elements, the quantity of ballast pumps, and the quantity of valves, and creates, after confirmation, a data sheet named T2 Element in the database described in (1) to store the pipe element information.
[28] (4) Node information is input. © The serial number and ©) the type of each node (including three types, i.e, a water suction node, a drainage node, and an intermediate node), 3) the X coordinate and 4) the Y coordinate of the position of the node on the GDI+ graph, and ©) the serial number of Unit A connected to the node (©) the serial number of Unit B, (7) the serial number of Unit C, and © the serial number of Unit D may be possibly needed according to pipe connections in the pipe network) are used for modeling of nodes in the simulation model. The system checks the completeness of the input information according to the quantity of nodes, the quantity of water suction points and the quantity of drainage points which are initialized, and creates, after confirmation, a data sheet named T3 Node in the database described in (1) to store the node information.
[29] (5) tank capacity information is input. (1) The tank capacity sheet of each ballast water tank is used for calculating a liquid level height and a loading rate of the ballast water tank. The system checks the completeness of the input information according to the initialized quantity of ballast water tanks, and creates, after confirmation, a plurality of data sheets prefixed with T4 in the database described in (1) to store the ballast water tank capacity data. T400 Capacity is used for storing the data of a general tank capacity sheet.
[30] (6) Hydrostatic information is input. (I) The hydrostatic information of the ship at each draft position is used for calculating the flotation condition of the ship. The system creates a data sheet named T5 Hydro in the database described in (1) to store the hydrostatic data of the ship. [BI] 3. GDI+ graph drawing is performed on the ship ballast water system simulation model. After all the information is input and confirmed, a simulation model is generated. The system reads the database generated by the input data in 2 and generates a ballast water system simulation model. The ballast pump control, the valve control, the ballast tank control, water suction inlet control, the drainage opening control, and a ballast pipeline are loaded through the GDI+ graph drawing program to generate a human-machine interaction interface.
[32] 4. The ship ballast water system simulation model is operated and controlled.
The mathematical model of the ballast water system simulation model is built on the basis of a finite element method and satisfies an operation mechanism and a control logic of the ship ballast water system input in 2. Real-time calculation of the hydrostatic force of the ballast water system is carried out according to turn-on and turn-off operation instructions of the user for the ballast pump and the valve, and the flow rate of each section of pipeline and changes of the liquid level of each ballast tank are obtained.
[33] A pipe element equation in the solved ballast water system simulation model 1s:
[34] O.=k + Ah,
L k= £ re [ft
[35] where 8 Al; +d; is an interpolation function of this pipe element; O; is the flow rate of the pipe element; Ah is the head loss between the nodes of the pipe element; ¢; is a local resistance coefficient; 4; is a resistance coefficient along the way; d is a pipe diameter; / is a pipe length.
[36] A nodal continuity equation in the solved ballast water system simulation model is:
[37] > 0] =; ,
[38] where Cis a net flow rate of a node.
[39] A pipe network matrix equation in the solved ballast water system simulation model is:
Sky ky 0 =k, [Th] [OQ © Sky ky + 0 ‘ : 0 kj ky = 0 |h|=|0, op Lhe 0 0 = Yk,|hl |C,
[41] 5. The ship ballast water system simulation model is monitored and displayed.
If the user makes a mistake when turning on and turning off the ballast pump and valve, the system will prompt a pipeline logic error. If the operation is correct, the user can observe the on states of each ballast pump and each pipeline valve, a flowing state of the pipeline, a water volume, a liquid level height and a loading rate of the ballast water tank, ship's fore and aft draft, and vertical and horizontal inclination angles through the monitoring and display module of the simulation system.
[42] 6. If the ship ballast water system to be simulated is replaced, 1-5 are repeated only to quickly build a new ship ballast water simulation model.
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| NL2032031A NL2032031B1 (en) | 2022-05-31 | 2022-05-31 | Computer-implemented universal simulation software system for ship ballast water system, and simulation method |
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| NL2032031A NL2032031B1 (en) | 2022-05-31 | 2022-05-31 | Computer-implemented universal simulation software system for ship ballast water system, and simulation method |
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2022
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