CN115146392A - Ship pipeline system modeling simulation method, computer storage medium and equipment - Google Patents

Abstract

The present application relates to the technical field of ships, and in particular, to a method for modeling a ship piping system, a computer storage medium and equipment. In different stages of ship piping system demonstration, design, construction, commissioning, etc., in order to meet the specific simulation and calculation requirements for the dynamic operating characteristics of the ship piping system, this application uses a parametric method to quickly establish a ship piping system simulation model. Establish a model library and a working substance physical parameter library. You can select the graphical modules in the model library according to the actual ship piping system to form a topological relationship diagram, and then set the parameters of the ship piping system and establish boundary parameters, and then carry out simulation calculation. , to realize the rapid simulation of the complex ship piping system of specific objects. For different complex ship piping systems, different models in the model library and the corresponding working medium parameters in the working substance physical parameter library can be selected to enhance the construction of the ship piping system. The generality of the simulation method has good and wide applicability.

Description

A method for modeling and simulation of ship piping system, computer storage medium and equipment

technical field

The present application relates to the field of ship technology, and in particular, to a method for modeling ship piping systems, a computer storage medium and equipment.

Background technique

The descriptions in this section merely provide background information related to the present disclosure and may not constitute prior art.

The structure of the ship's pipeline system of the ship's power plant is complex. The actual ship's pipeline system is composed of a large number of pipelines and pipeline connectors. During the ship construction process, the ship's pipeline system accounts for about % of the total ship construction workload. twenty. Most of the equipment is connected and transported through the ship's pipeline system. The ship's piping system needs to go through complex demonstration, design, construction, debugging and other work to meet the actual needs of the ship's power plant. Therefore, it needs to be demonstrated by means of simulation. Firstly, the ship piping system is modeled from the one-dimensional system level, and on this basis, the simulation and calculation of the flow characteristics of the one-dimensional system are carried out, and then the dynamic operating characteristics of the ship piping system are fully understood and understood. The pipeline system of the ship power plant is complex, and the actual operation involves various working fluids, various physical states, and there are various complex and heterogeneous components. Some large and complex ship piping systems involve the layout of three-dimensional space, with long lengths, large space widths, and complex directions. Generally speaking, the pipeline system of the marine power plant needs to be debugged before it can be operated, and in the actual debug operation stage, it is necessary to fully explore its dynamic operation characteristics by means of simulation. When some commercial software is used for simulation modeling, its scope of application is small, and a lot of modifications are often required when modeling and simulating the piping system of other different ship power plants.

SUMMARY OF THE INVENTION

The purpose of the embodiments of the present application is to provide a modeling and simulation method for a ship piping system, which is used to improve the versatility of modeling and simulation of a ship piping system.

Another object of the embodiments of the present application is to provide a computer storage medium and a computer device for the above-mentioned method for modeling and simulation of a ship management system.

In a first aspect, a modeling and simulation method for a ship piping system is provided, including the following steps:

1) Establish a parametric model library for the ship piping system: The piping components in the ship piping system include pipelines and pipeline connectors, and a general piping component simulation model library is established as the basis for modeling and simulation; Each type of pipeline component in the pipeline component simulation model library is abstracted according to the one-dimensional flow characteristics, and mathematical modeling is carried out based on the physical process of the actual one-dimensional flow. Parametric model, the parametric model of each pipeline component forms a parametric model library, and each pipeline component forms a graphical module;

Establish the physical parameter form of the working fluid of the ship's pipeline system, and form the working substance's physical parameter library of the ship's pipeline system, so that the required working fluid and physical properties can be selected for the ship's pipeline system that needs to be modeled and simulated;

2) According to the connection relationship of the pipeline components in the actual ship pipeline system, connect on the basis of the graphical module formed in step 1), build a topology relationship diagram, and form a system simulation model of the ship pipeline system; establish connection components The parameter form of the connection relationship between them, the parameter form of the connection relationship includes the connection relationship parameters between the pipeline components and the transfer relationship parameters between the pipeline components;

3) According to the topological relationship diagram of the ship piping system formed in step 2), the input parameter form of the system simulation model is established, and the input parameter form includes structural parameters and initial parameters, so as to be able to parameterize the ship piping system. ;

4) Set the boundary parameters of the system simulation model in step 2) according to the properties of the ship's pipeline system, the boundary parameters include flow boundary and pressure boundary, the pressure boundary is used to transmit pressure parameters outward, and the flow boundary is used to transmit flow parameters outward;

5) Build and complete the system simulation model and carry out the simulation calculation of the dynamic characteristics of the ship piping system, and establish the simulation output parameter form, which includes the output parameters that change with time.

In a possible implementation scheme, in step 1), the working fluid of the ship's pipeline system includes water, oil, and air. Fuel, lubricating oil.

In a possible implementation scheme, in step 2), the topological relationship diagram includes connections between pipelines, and pipeline connectors are represented in the form of connection nodes, and the connection nodes are used to check the pipelines and pipelines that need to be connected. Whether the coordinates of the starting point are consistent.

In a possible implementation scheme, in step 2), a topological relationship diagram is constructed based on the three-dimensional spatial coordinates of the ship's pipeline system.

In a possible implementation scheme, in step 3), the structural parameters include diameter, wall thickness, roughness, and three-dimensional spatial coordinates, and the initial parameters include initial flow and initial pressure.

In a possible implementation scheme, the boundary parameters in step 4) also include an internal boundary, the internal boundary includes connection nodes between various pipelines, and the internal boundary is used to transmit the parameters required for the internal calculation of the ship's pipeline system.

In a possible implementation scheme, the ship piping system modeling and simulation method further includes the step of parameterized expansion and modification, and according to the actual conditions of the ship piping system, the model library and parameters are adjusted according to the content in steps 1) to 4). Make extended modifications.

In a second aspect, a computer storage medium is also provided, which stores a computer program, and when the program is executed by a processor, implements the method for modeling and simulating a ship piping system described in any possible embodiment of the first aspect.

In a third aspect, a computer device is also provided, which is characterized by comprising a memory and a processor, wherein the memory stores a computer program, and when the program is executed by the processor, implements the ship described in any possible implementation of the first aspect Pipeline system modeling and simulation method.

The beneficial effects of the ship piping system modeling and simulation method in this application are:

In different stages such as demonstration, design, construction and commissioning of the ship piping system, in order to meet the specific simulation and calculation requirements for the dynamic operating characteristics of the ship piping system, this application uses a parametric method to quickly establish a simulation model of the ship piping system. Establish a model library and a working substance physical parameter library. You can select the graphical modules in the model library according to the actual ship piping system to form a topology diagram, and then set the parameters of the ship piping system and establish boundary parameters for simulation calculation. Realize the rapid simulation of the complex ship piping system of specific objects. For different complex ship piping systems, different models in the model library and the corresponding working medium parameters in the working substance physical parameter library can be selected to enhance the modeling of the ship piping system. The generality of the simulation method has good and wide applicability.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present application more clearly, the following drawings will briefly introduce the drawings that need to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore do not It should be regarded as a limitation of the scope, and for those of ordinary skill in the art, other related drawings can also be obtained according to these drawings without any creative effort.

Fig. 1 is a flow chart in an embodiment of a method for modeling and simulation of a ship piping system according to the present application;

Fig. 2 is a schematic diagram showing the topology relationship of parametric modeling and simulation of a ship piping system in an embodiment of a method for modeling and simulation of a ship piping system according to the present application.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of the present application, but not all of the embodiments. The components of the embodiments of the present application generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

Thus, the following detailed description of the embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the application as claimed, but is merely representative of selected embodiments of the application. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of this application.

In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

According to a first aspect of the present application, a method for modeling and simulation of a ship piping system is first provided, see FIG. 1 and FIG. 2 . In this embodiment, the marine pipeline system of the marine power plant is taken as an example for description.

The modeling and simulation method of ship piping system includes the following steps:

1) Establish a parametric model library for the ship piping system: The piping components in the ship piping system include pipelines and pipeline connectors, and a general piping component simulation model library is established as the basis for modeling and simulation; Each type of pipeline component in the pipeline component simulation model library is abstracted according to the one-dimensional flow characteristics, and mathematical modeling is carried out based on the physical process of the actual one-dimensional flow. Parametric model, the parametric model of each pipeline component forms a parametric model library, and each pipeline component forms a graphical module.

Specifically, the pipeline includes a round pipe, a triangular pipe, a rectangular pipe, a hexagonal pipe, and the like. Pipeline connectors include tee joints, elbow joints, 90° folded pipes, sudden expansion sections, sudden contraction sections, etc.

The ship piping system in this embodiment is a ship piping system with a complex three-dimensional space structure, and includes a number of pipelines and pipeline connectors.

The one-dimensional flow characteristic in this embodiment includes the time-varying characteristics of pressure and flow along the flow direction of the vessel piping system. Due to the similarity of various components, the parametric model of each component is obtained through mathematical modeling and abstraction. Involves parametric properties of individual components, such as internal parameters, boundary parameters, process parameters. After mathematical modeling and abstraction, it is classified as a parametric model library. In this step, different types of pipelines and pipeline connectors with common points in the complex ship pipeline system are sorted separately, and relevant parameters are abstracted based on the structure and actual physical process. A class of components is represented by a parametric simulation model, not a specific physical object. This step is the basis of parameterization and establishes the overall parameterization framework.

Establish the physical parameter form of the working fluid of the ship's pipeline system, and form the working substance's physical parameter library of the ship's pipeline system, so that the required working fluid and physical properties can be selected for the ship's pipeline system that needs to be modeled and simulated. Specifically, the working medium of the ship's pipeline system includes water, oil, and air. Among the physical parameters of the working medium, water has two phases: vapor phase and liquid phase, and oil includes fuel oil and lubricating oil. For some pipelines and pipeline connectors, there are various working fluids to be mixed. According to the ratio of different working fluids, the physical properties of the mixed working fluids are set based on the above working fluids. For different complex ship piping systems, the required working fluid and physical properties are selected respectively. Through this step, the physical property parameter form of the working medium in the ship's pipeline system is established, and the physical property parameter form of the working medium includes the physical property parameter of the working medium.

2) According to the connection relationship of the pipeline components in the actual ship pipeline system, connect on the basis of the graphical module formed in step 1), build a topology relationship diagram, and form a system simulation model of the ship pipeline system; establish connection components The parameter form of the connection relationship between them includes the connection relationship parameter between the pipeline components and the transfer relationship parameter between the pipeline components.

Specifically, the topology relationship diagram includes connections between pipelines, and pipeline connectors are represented in the form of connection nodes.

As shown in Fig. 2, a topological relationship diagram is constructed based on the three-dimensional spatial coordinates of the ship's pipeline system.

3) According to the topological relationship diagram of the ship piping system formed in step 2), the input parameter form of the system simulation model is established, and the input parameter form includes structural parameters and initial parameters, so as to be able to parameterize the ship piping system. .

According to the topological relationship diagram of the ship's pipeline system, the parameterization settings of each pipeline and pipeline connection are carried out respectively. The structural parameters of the ship's pipeline system include length, diameter, wall thickness, roughness, three-dimensional space coordinates (starting point) coordinates, end point coordinates). The structural parameters of pipeline connectors include diameter, wall thickness, roughness, and three-dimensional space coordinates (starting point coordinates, end point coordinates). The initial parameters in the ship piping system include the required input initial flow and initial pressure. The connection node is used to check whether the coordinates of the pipeline to be connected are consistent with the starting point of the pipeline. Through this step, the input parameter form of the system simulation model is established, and the input parameter form includes structural parameters and initial parameters.

4) Set the boundary parameters of the system simulation model in step 2) according to the properties of the ship's pipeline system, the boundary parameters include flow boundary and pressure boundary, the pressure boundary is used to transmit pressure parameters outward, and the flow boundary is used to transmit flow parameters outward;

Specifically, the boundaries of the ship pipeline system are divided into two categories: flow boundaries and pressure boundaries. The complex ship pipeline system is connected to the outside through the boundaries, and the required boundaries are set according to the properties of the simulation model. The pressure boundary is used for the outward The pressure parameter is passed, and the flow boundary outward is used to pass the flow parameter. The internal boundary, that is, the connection node, is used to transmit the parameters required for the internal calculation of the complex ship piping system, mainly the pressure and flow before and after the connection point. The parametric form of the boundary through this step includes the boundary parameter.

5) Build and complete the system simulation model and carry out the simulation calculation of the dynamic characteristics of the ship piping system, and establish the simulation output parameter form, which includes the output parameters that change with time.

Specifically, the simulation calculation mainly obtains the dynamic response of the parameters of the pipeline and pipeline connectors to be observed over time, so it is used as the output.

In this embodiment, the method for modeling and simulating the ship piping system further includes the step of parameterized expansion and modification. Before step 5), according to the actual conditions of the ship piping system, according to the content in steps 1) to 4), the model is Libraries and parameters for extended modification. The modeling and simulation for the complex ship piping system is represented in the form of parameters. Some new ship piping system components can follow the above steps to add the relevant components to the model library in the form of parameters, and new working fluids can also follow the above steps to add new Working substance property parameter library.

To sum up, in the process of modeling and simulation calculation of ship piping system, this application is oriented to one-dimensional dynamic characteristic simulation calculation, adopts parametric modeling and simulation method, and is oriented to the demonstration, design, construction, debugging, etc. of ship piping system. The requirements for the dynamic operating characteristics of the complex ship piping system at different stages, in the form of parameterization of the whole process and the whole system, to achieve faster one-dimensional fluid dynamic characteristics modeling, for the dynamic performance of the complex piping fluid system of the ship power plant in actual engineering Characteristic fast simulation provides a fast, convenient and effective method.

In this application, a parametric method is used to quickly establish a simulation model of the ship's pipeline system. By establishing a model library and a working substance physical parameter library, the graphical modules in the model library can be selected according to the actual ship's pipeline system to form a topology relationship diagram. The ship piping system is parameterized and the boundary parameters are established, and then simulation calculation is performed to realize the rapid simulation of the complex ship piping system of specific objects. For different complex ship piping systems, different models and tools in the model library can be selected. The corresponding working medium parameters in the material property parameter library enhance the versatility of the modeling and simulation method of the ship piping system, and have good and wide applicability.

In a second aspect, a computer storage medium is further provided, which is characterized in that it stores a computer program, and when the program is executed by the processor, the method for modeling and simulating the ship piping system described in the embodiment of the first aspect is implemented. Preferably, the storage medium includes: ROM, RAM, magnetic disk, U disk, memory card or optical disk and other media that can store program codes.

In a third aspect, a computer device is also provided, including a memory and a processor, wherein the memory stores a computer program, and when the program is executed by the processor, the method for modeling and simulating the ship piping system described in the embodiment of the first aspect is implemented .

The memory includes: ROM, RAM, magnetic disk, U disk, memory card or optical disk and other media that can store program codes. A processor is coupled to the memory for executing computer programs stored in the memory.

Preferably, the processor may be a general-purpose processor, including a central processing unit (Central Processing Unit, CPU for short), a network processor (Network Processor, NP for short), etc.; it may also be a digital signal processor (Digital Signal Processor, for short) DSP), Application Specific Integrated Circuit (ASIC for short), Field Programmable Gate Array (FPGA for short) or other programmable logic devices, discrete gate or transistor logic devices, and discrete hardware components.

The above are only preferred embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the protection scope of this application.

Claims (9)

1. A ship pipeline system modeling simulation method is characterized by comprising the following steps:

1) Establishing a ship pipeline system parameterized model library: the pipeline assembly in the ship pipeline system comprises a pipeline and a pipeline connecting piece, and a universal pipeline assembly simulation model library is established and used as the basis of modeling simulation; abstracting each type of pipeline component in a pipeline component simulation model library according to one-dimensional flow characteristics, performing mathematical modeling based on the physical process of actual one-dimensional flow, obtaining a parameterized model of each pipeline component through mathematical modeling and abstraction, forming the parameterized model library of each pipeline component, and forming each pipeline component into a graphical module;

establishing a physical property parameter form of a working medium of the ship pipeline system to form a working medium physical property parameter library of the ship pipeline system so as to select the required working medium and physical properties aiming at the ship pipeline system needing modeling simulation;

2) Connecting based on the graphical module formed in the step 1) according to the connection relation of pipeline components in the actual ship pipeline system, constructing a topological relation diagram, and forming a system simulation model of the ship pipeline system; establishing a parameter form of a connection relation between the connecting components, wherein the parameter form of the connection relation comprises a connection relation parameter between the pipeline components and a transfer relation parameter between the pipeline components;

3) Aiming at the topological relation graph of the ship pipeline system formed in the step 2), establishing an input parameter form of a system simulation model, wherein the input parameter form comprises a structure parameter and an initial parameter so as to carry out parameterization setting on each pipeline component;

4) Setting boundary parameters of the system simulation model in the step 2) according to the attributes of the ship pipeline system, wherein the boundary parameters comprise a flow boundary and a pressure boundary, the pressure boundary is used for transmitting the pressure parameters outwards, and the flow boundary is used for transmitting the flow parameters outwards;

5) And constructing a system simulation model, carrying out dynamic characteristic simulation calculation on the ship pipeline system, and establishing a simulation output parameter form, wherein the simulation output parameter form comprises output parameters changing along with time.

2. The ship pipeline system modeling and simulation method according to claim 1, wherein in step 1), the working medium of the ship pipeline system includes water, oil and air, and in the physical property parameters of the working medium, the water has two phase states of vapor phase and liquid phase, and the oil includes fuel oil and lubricating oil.

3. The ship pipeline system modeling and simulation method according to claim 1, wherein in step 2), the topological relation graph comprises connections between pipelines, pipeline connectors are represented in the form of connection nodes, and the connection nodes are used for checking whether the pipelines to be connected are consistent with the coordinates of the starting points of the pipelines.

4. The ship pipeline system modeling and simulation method according to claim 1, wherein in step 2), the topological relation graph is constructed based on three-dimensional space coordinates of the ship pipeline system.

5. The ship pipeline system modeling and simulation method of claim 1, wherein in step 3), the structural parameters comprise diameter, wall thickness, roughness and three-dimensional space coordinates, and the initial parameters comprise initial flow and initial pressure.

6. The ship pipeline system modeling and simulation method of claim 1, wherein the boundary parameters in step 4) further include internal boundaries, the internal boundaries include connection nodes between pipelines, and the internal boundaries are used for transmitting parameters required by internal calculation of the ship pipeline system.

7. The ship pipeline system modeling and simulation method according to claim 1, further comprising a step of parameterization extension modification, wherein the model base and parameters are extended and modified according to the actual conditions of the ship pipeline system and the contents in the steps 1) to 4).

8. A computer storage medium, characterized in that it stores a computer program which, when executed by a processor, implements the ship pipe system modeling simulation method of any one of claims 1 to 7.

9. A computer device, comprising:

a memory storing a computer program which, when executed by the processor, implements the ship pipe system modeling simulation method of any one of 1 to 7.

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