CN113642105B - Multi-scale model construction method and device for ship power system and electronic equipment - Google Patents
Multi-scale model construction method and device for ship power system and electronic equipment Download PDFInfo
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Abstract
The invention provides a method and a device for constructing a multi-scale model of a ship power system and electronic equipment, wherein the method for constructing the multi-scale model of the ship power system comprises the following steps: dividing a ship power system into a plurality of levels, and constructing a coupling simulation frame based on the plurality of levels; wherein, coupling simulation framework includes: the transfer relation between the one-dimensional simulation model and the three-dimensional simulation reduced-order model of the ship power system; acquiring a three-dimensional simulation database of a corresponding part or equipment of the ship power system, and acquiring a data matrix of the target parameters based on the coupling simulation frame and the three-dimensional simulation database; extracting a feature vector corresponding to the maximum feature value of the data matrix, constructing an eigenvector of an eigenvector decomposition base vector of a target parameter based on the feature vector, and determining a base coefficient to obtain a three-dimensional simulation reduced-order model; based on the coupling simulation framework, a one-dimensional simulation model is obtained. The method can improve the calculation efficiency of the simulation model and accurately reflect the real operation characteristics of the ship power system.
Description
Technical Field
The invention relates to the technical field of ship power, in particular to a method and a device for constructing a multi-scale model of a ship power system and electronic equipment.
Background
The power system is a heart of marine equipment such as a ship and provides energy sources such as propulsion power, electric power and the like for the marine equipment such as the ship, the mobility, stealth, cruising ability and other comprehensive performances of the marine equipment such as the ship are directly determined, the energy transmission mechanism of the ship power system is explored, the operation rule of the power system is mastered, and the ship power system optimization design method is of great significance.
Along with the continuous development of computing power and models, numerical simulation has become an important direction of a ship power system, and for the complex system such as the ship power system, the three-dimensional unsteady numerical simulation of the whole system has huge computing amount and is difficult to converge, and the current stage is difficult to realize, so that the one-dimensional system simulation is generally adopted for the large complex system such as the ship power system. However, when the local variation is severe, the non-uniform characteristic is obvious or the external characteristic of the component is not clear, the real running characteristic cannot be accurately reflected by adopting one-dimensional system simulation, and three-dimensional simulation research needs to be carried out.
Therefore, the existing one-dimensional-three-dimensional coupling simulation model of the ship power system is difficult to consider the high calculation efficiency and cannot accurately reflect the real operation characteristics of the ship power system.
Disclosure of Invention
The invention provides a multi-scale model construction method, a device and electronic equipment of a ship power system, which are used for solving the defects that a simulation model of the ship power system in the prior art cannot be considered to have high calculation efficiency and cannot accurately reflect the real operation characteristics of the ship power system, and realizing that the calculation efficiency of the simulation model can be improved and the real operation characteristics of the ship power system can be accurately reflected.
The invention provides a method for constructing a multi-scale model of a ship power system, which comprises the following steps:
dividing a ship power system into a plurality of levels, and constructing a coupling simulation frame based on the levels; wherein the coupling simulation framework comprises: the transfer relation between the one-dimensional simulation model and the three-dimensional simulation reduced-order model of the ship power system;
acquiring a three-dimensional simulation database of the local or equipment of the ship power system, and obtaining a data matrix of target parameters based on the coupling simulation frame and the three-dimensional simulation database;
extracting a feature vector corresponding to the maximum feature value of the data matrix, constructing an eigenvector of the target parameter based on the feature vector, determining a base coefficient, and obtaining a three-dimensional simulation reduced-order model of the target parameter based on the base vector and the base coefficient;
and based on the coupling simulation framework, obtaining a one-dimensional simulation model coupled with the three-dimensional simulation reduced-order model.
According to the method for constructing the multi-scale model of the ship power system provided by the invention, the method for acquiring the three-dimensional simulation database of the corresponding part or equipment of the ship power system comprises the following steps:
based on the design and operation requirements of the ship power system, a three-dimensional simulation operation range and a parameter boundary are obtained;
determining a three-dimensional simulation calculation sample space based on the three-dimensional simulation operation range and the parameter boundary;
and performing three-dimensional numerical simulation on the three-dimensional simulation calculation sample space to obtain the three-dimensional simulation database.
The method for constructing the multi-scale model of the ship power system provided by the invention further comprises the following steps:
acquiring local or equipment three-dimensional simulation data of the ship power system under the target working condition of the ship power system;
and under the target working condition, comparing the output result of the three-dimensional simulation reduced-order model with local or equipment three-dimensional simulation data of the ship power system, and updating the three-dimensional simulation reduced-order model based on the comparison result.
According to the method for constructing the multi-scale model of the ship power system provided by the invention, the one-dimensional simulation model coupled with the three-dimensional simulation reduced-order model is obtained based on the coupling simulation frame, and the method comprises the following steps:
based on the coupling simulation framework, obtaining a one-dimensional simulation function corresponding to the ship power system;
constructing a theoretical model library based on the one-dimensional simulation function;
and carrying out model construction on the ship power system based on the theoretical model library to obtain the one-dimensional simulation model.
The method for constructing the multi-scale model of the ship power system provided by the invention further comprises the following steps:
setting a simulation time step and iteration precision for the one-dimensional simulation model;
transmitting the one-dimensional data to be transmitted to the three-dimensional simulation reduced order model to obtain an output result;
and sending the output result of the reduced-order model to the one-dimensional simulation model, and carrying out iterative updating on the one-dimensional simulation model.
The invention also provides a device for constructing the multi-scale model of the ship power system, which comprises the following steps:
the system comprises a frame construction module, a coupling simulation frame, a simulation module and a control module, wherein the frame construction module is used for dividing a ship power system into a plurality of levels and constructing the coupling simulation frame based on the levels; wherein the coupling simulation framework comprises: the transfer relation between the one-dimensional simulation model and the three-dimensional simulation reduced-order model of the ship power system;
the matrix construction module is used for acquiring a three-dimensional simulation database of the corresponding part or equipment of the ship power system and obtaining a data matrix of the target parameters based on the coupling simulation frame and the three-dimensional simulation database;
the first model construction module is used for extracting a feature vector corresponding to the maximum feature value of the data matrix, constructing an eigenvector of the target parameter based on the feature vector, determining a base coefficient, and obtaining a three-dimensional simulation reduced-order model of the transfer parameter based on the base vector and the base coefficient;
and the second model construction module is used for obtaining a one-dimensional simulation model coupled with the three-dimensional simulation reduced-order model based on the coupling simulation framework.
According to the multi-scale model construction device of the ship power system provided by the invention, the matrix construction module comprises:
the first calculation unit is used for obtaining a three-dimensional simulation operation range and a parameter boundary based on the design and operation requirements of the ship power system;
the second calculation unit is used for determining a three-dimensional simulation calculation sample space based on the three-dimensional simulation operation range and the parameter boundary;
and the third calculation unit is used for carrying out three-dimensional numerical simulation on the three-dimensional simulation calculation sample space to obtain the three-dimensional simulation database.
The device for constructing the multi-scale model of the ship power system provided by the invention further comprises:
the simulation data acquisition module is used for acquiring local or equipment three-dimensional simulation data of the ship power system under the target working condition of the ship power system;
and the model updating module is used for comparing the output result of the three-dimensional simulation reduced-order model with the local or equipment three-dimensional simulation data of the ship power system under the target working condition, and updating the three-dimensional simulation reduced-order model based on the comparison result.
The invention also provides an electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the steps of the multi-scale model construction method of the ship power system according to any one of the above when executing the program.
The invention also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the method of multi-scale model construction of a marine vessel power system as described in any of the preceding claims.
According to the multi-scale model construction method, the device and the electronic equipment of the ship power system, the ship power system is divided into a plurality of layers, and a coupling simulation frame is constructed based on the layers; wherein, coupling simulation framework includes: the transfer relation between the one-dimensional simulation model and the three-dimensional simulation reduced-order model of the ship power system; acquiring a three-dimensional simulation database of a corresponding part or equipment of the ship power system, and acquiring a data matrix based on the coupling simulation frame and the three-dimensional simulation database; extracting feature vectors of the data matrix, carrying out orthogonal decomposition on the feature vectors to obtain base vectors, and determining base coefficients to obtain a three-dimensional simulation reduced-order model; based on the coupling simulation framework, a one-dimensional simulation model coupled with the three-dimensional simulation reduced-order model is obtained.
Compared with the prior art, in each simulation analysis of the ship power system, the calculation iteration of the computational fluid dynamics numerical method is required to be called once to obtain the corresponding three-dimensional data simulation result, however, in the process of calling the computational fluid dynamics numerical method, the discrete form of the differential equation is required to be solved in a discrete space, and in the solving process, iteration convergence is required to be continuously carried out, so that excessive time is consumed.
The method comprises the steps of obtaining a three-dimensional simulation database of a ship power system corresponding to a part or equipment, and obtaining a data matrix based on a coupling simulation frame and the three-dimensional simulation database; the method has the advantages that the characteristic vectors of the data matrix are extracted, orthogonal decomposition is carried out on the characteristic vectors, a three-dimensional simulation reduced order model is obtained, the differential method is not needed to be solved in the process, three-dimensional data simulation is realized by adopting the three-dimensional simulation reduced order model, the time required by simulation operation can be greatly reduced, the simulation efficiency is improved, and the convergence problem is avoided.
Therefore, the method can improve the calculation efficiency of the simulation model, and can accurately reflect the real operation characteristics of the ship power system through the three-dimensional simulation of the three-dimensional simulation reduced-order model.
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In order to more clearly illustrate the invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic flow diagram of a method for constructing a multi-scale model of a ship power system according to the present invention;
FIG. 2 is a schematic flow chart of constructing a three-dimensional simulation reduced-order model provided by the invention;
FIG. 3 is a schematic diagram of a one-dimensional-three-dimensional simulation model coupling calculation flow provided by the invention;
FIG. 4 is a second flow chart of a method for constructing a multi-scale model of a ship power system according to the present invention;
FIG. 5 is a schematic block diagram of a multi-scale model building apparatus for a marine propulsion system according to the present invention;
fig. 6 is a schematic structural diagram of an electronic device provided by the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The method, the device and the electronic equipment for constructing the multi-scale model of the ship power system are described below with reference to fig. 1 to 6.
As shown in fig. 1, the method for constructing the multi-scale model of the ship power system provided by the invention comprises the following steps:
step 110, dividing a ship power system into a plurality of layers, and constructing a coupling simulation frame based on the layers; wherein, coupling simulation framework includes: and the transmission relation between the one-dimensional simulation model and the three-dimensional simulation reduced-order model of the ship power system.
It should be noted that, for the running and energy transmission characteristics of the ship power system, the ship power system is further divided into different levels such as subsystems, devices and parts, and according to the flow characteristics and actual requirements of the ship power system, the devices or parts with three-dimensional simulation requirements, such as water pumps or valves, are determined.
Determining transmission parameters of a one-dimensional-three-dimensional coupling simulation model and parameter setting interfaces, such as inlet and outlet pressure, flow, temperature or enthalpy value, and the like, according to the composition relation of each level of the carding ship power system and the coupling connection relation between each level, such as the coupling connection relation between equipment and subsystems; the three-dimensional simulation adopts a three-dimensional simulation reduced order model based on intrinsic orthogonal decomposition to realize high-fidelity prediction.
It can be understood that the one-dimensional-three-dimensional coupling simulation model transfer parameters and the parameter setting interface are determined, namely, the coupling simulation framework is determined, the coupling simulation framework is used for representing the transfer relationship between the one-dimensional simulation model and the three-dimensional simulation reduced-order model of the ship power system, the parameters corresponding to the transfer relationship between the one-dimensional simulation model and the three-dimensional simulation reduced-order model are parameters, namely, the one-dimensional-three-dimensional coupling simulation model transfer parameters, and the type of the transfer parameters can be set through the parameter setting interface.
And 120, acquiring a three-dimensional simulation database of a corresponding part or equipment of the ship power system, and obtaining a data matrix of the target parameters based on the coupling simulation frame and the three-dimensional simulation database.
It is understood that the three-dimensional simulation database of the vessel power system corresponding to the part or the equipment may be a three-dimensional simulation database of the vessel power system corresponding to the sub-level of the vessel power system, for example, the equipment of the vessel power system or the three-dimensional simulation database of the part of the vessel power system corresponding to the vessel power system.
The data matrix is obtained based on the coupling simulation frame and the three-dimensional simulation database, and the data matrix of corresponding target parameters can be constructed one by one based on the transmission parameters in the coupling simulation frame and the three-dimensional simulation database.
And 130, extracting a feature vector corresponding to the maximum feature value of the data matrix, constructing an eigenvector of the target parameter based on the feature vector, determining a base coefficient, and obtaining a three-dimensional simulation reduced-order model of the transfer parameter based on the base vector and the base coefficient.
It can be appreciated that the problem that a large amount of memory and machine time are consumed in the process of decomposing the data matrix can be avoided by adopting the Sirovich method to perform orthogonal decomposition on the feature vectors.
It should be noted that the three-dimensional simulation reduced-order model is not used for three-dimensional simulation, but replaces direct three-dimensional simulation.
And 140, obtaining a one-dimensional simulation model coupled with the three-dimensional simulation reduced-order model based on the coupling simulation framework.
It should be noted that, the one-dimensional simulation model, that is, after receiving the setting data related to the ship power system, performs one-dimensional data simulation to obtain a corresponding one-dimensional data simulation result.
The one-dimensional simulation model is coupled with the three-dimensional simulation reduced-order model, namely, an output result of the three-dimensional simulation reduced-order model is sent to the one-dimensional simulation model, the one-dimensional simulation model carries out one-dimensional data simulation based on the output result of the three-dimensional simulation reduced-order model to obtain a one-dimensional data simulation result, and the one-dimensional data simulation result is sent to the three-dimensional simulation reduced-order model to serve as an input parameter of the three-dimensional simulation reduced-order model.
The one-dimensional simulation model and the three-dimensional simulation reduced-order model jointly form a simulation model of the ship power system.
In some embodiments, obtaining a three-dimensional simulation database of a corresponding part or device of a vessel power system includes:
based on the design and operation requirements of a ship power system, a three-dimensional simulation operation range and a parameter boundary are obtained;
determining a three-dimensional simulation calculation sample space based on the three-dimensional simulation operation range and the parameter boundary;
and performing three-dimensional numerical simulation on the three-dimensional simulation calculation sample space to obtain a three-dimensional simulation database.
For sub-levels of a ship's power system, such as a plant or a part of the ship's power system, where three-dimensional simulation is required. According to the design requirements of the ship power system, the operation range is defined, the parameter boundary is determined, the equipment or local three-dimensional simulation calculation sample space covering the parameter boundary is determined, three-dimensional numerical simulation in the sample space under a series of different working conditions is carried out, and a three-dimensional simulation database of related sub-levels of the ship power system is constructed.
In some embodiments, extracting feature vectors of the data matrix includes:
and extracting a feature vector corresponding to the maximum feature value of the data matrix.
In some embodiments, performing orthogonal decomposition on the feature vectors to obtain a three-dimensional simulated reduced order model, including:
performing orthogonal decomposition on the feature vector to obtain a base vector and a base coefficient;
based on the base vector and the base coefficient, a three-dimensional simulation reduced-order model is obtained; the three-dimensional simulation reduced-order model can also set parameter types, output parameters are one-dimensional data corresponding to the parameter types, and three-dimensional distribution of target parameters can be reconstructed through the three-dimensional simulation reduced-order model.
It can be understood that the eigenvector corresponding to the maximum eigenvalue is extracted, the eigenvector of the eigenvalue corresponding to the target parameter is constructed, the base coefficient is determined by interpolation or machine learning, and the three-dimensional simulation reduced order model based on eigenvalue of the corresponding equipment or local transmission parameter space is obtained, the input parameters of the model are boundary exchange parameters in the one-dimensional and three-dimensional coupling simulation frame, and the output parameters of the model are corresponding external characteristics and internal three-dimensional distribution of the target parameter.
In some embodiments, the method of multi-scale model construction of a marine vessel power system further comprises:
acquiring local or equipment three-dimensional simulation data of the ship power system under the target working condition of the ship power system;
and under the target working condition, comparing the output result of the three-dimensional simulation reduced-order model with local or equipment three-dimensional simulation data of the ship power system, and updating the three-dimensional simulation reduced-order model based on the comparison result.
And comparing the output result of the three-dimensional simulation reduced model with three-dimensional simulation data under the target working condition of the ship power system, evaluating the precision of the three-dimensional simulation reduced model, supplementing and constructing a three-dimensional simulation database again when the precision of the three-dimensional simulation reduced model does not meet the requirement, and updating the three-dimensional simulation reduced model until the precision of the three-dimensional simulation reduced model meets the requirement.
The flow of constructing the three-dimensional simulation reduced-order model is shown in fig. 2, and it can be understood that the three-dimensional simulation database is constructed based on the computational fluid dynamics numerical method and the input working condition of the ship power system, and then the data of interest is processed after being screened from the three-dimensional simulation database according to the input variable of interest and the region of interest of the ship power system, so as to obtain the data matrix.
And carrying out orthogonal decomposition on the data matrix to obtain a base mode of orthogonal decomposition, namely a base vector and a base coefficient. The orthogonal decomposition base mode data has a plurality of items, and partial data can be selected from the plurality of items of base mode data, such as the former ten items of data, so as to form a three-dimensional simulation reduced-order model.
And inputting new working condition data into the three-dimensional simulation reduced model to obtain an output result of the three-dimensional simulation reduced model, namely the prediction characteristic of the three-dimensional simulation reduced model. In addition, based on a computational fluid dynamics numerical method, the input new working condition data are combined to obtain the new working condition operation characteristics, namely the three-dimensional simulation data corresponding to the new working condition.
Comparing the predicted characteristic of the three-dimensional simulation reduced model with the calculated new working condition operation characteristic, judging whether the predicted characteristic of the three-dimensional simulation reduced model meets the requirement, if not, supplementing the new working condition operation characteristic into the three-dimensional simulation database, repeating the flow, and updating the three-dimensional simulation reduced model.
In some embodiments, based on the coupling simulation framework, a one-dimensional simulation model coupled with the three-dimensional simulation reduced-order model is obtained, comprising:
based on the coupling simulation frame, obtaining a one-dimensional simulation function corresponding to the ship power system;
constructing a theoretical model library based on the one-dimensional simulation function;
and (3) carrying out model construction on the ship power system based on the theoretical model library to obtain a one-dimensional simulation model.
It can be understood that according to the above coupling simulation frame and the coupling relation of each level of the ship power system, such as the system, the subsystem, the equipment, the parts, etc., based on conservation equations, experience models, etc., discrete formats of related equations are established, a basic theoretical model library is established based on Modelica language, further related parts and equipment databases are sequentially established from bottom to top through basic theoretical model library combination, and models of the subsystem, the system, etc. are established through modes of dragging, text writing, etc., so that the system has one-dimensional system dynamic simulation analysis capability, and corresponding three-dimensional simulation analysis interfaces are reserved.
In some embodiments, the method of multi-scale model construction of a marine vessel power system further comprises:
setting a simulation time step and iteration precision for the one-dimensional simulation model;
transmitting the one-dimensional data to be transmitted to a three-dimensional simulation reduced-order model to obtain an output result;
and sending the output result to the one-dimensional simulation model, and carrying out iterative updating on the one-dimensional simulation model.
It can be understood that, based on the one-dimensional simulation model, the three-dimensional simulation reduced-order model and the coupling simulation framework, the one-dimensional and three-dimensional coupling simulation is developed, firstly, initial value setting is performed on one-dimensional system simulation, initialization is performed, simulation time step length, iteration precision and the like are set.
And sending a simulation start instruction, starting the three-dimensional simulation reduced model, and transmitting parameters at the one-dimensional and three-dimensional coupling simulation interface to the three-dimensional simulation reduced model. Parameters at the one-dimensional-three-dimensional coupling simulation interface, namely one-dimensional data to be simulated, are taken as an example of a centrifugal pump, and parameters such as inlet flow, pressure, temperature, rotational speed of the centrifugal pump and the like are transmitted to a three-dimensional simulation reduced-order model.
The three-dimensional simulation reduced model is provided with a three-dimensional simulation end which is used for carrying out three-dimensional data simulation and transmitting parameters at a one-dimensional and three-dimensional coupling simulation interface to the three-dimensional simulation end of the three-dimensional simulation reduced model.
The three-dimensional simulation terminal is different from the traditional one-dimensional and three-dimensional coupling simulation method after receiving the data, and the invention can quickly calculate and obtain the macroscopic external characteristics of the ship power system based on the three-dimensional simulation reduced-order model, reconstruct the internal three-dimensional flow field, pressure field or temperature field, and the like, and output the parameters at the outlet of the ship power system. Taking a centrifugal pump as an example, external characteristics such as lift and the like are obtained through a three-dimensional simulation reduced-order model, and parameters such as outlet pressure, flow and the like are output at an outlet of a ship power system and are used for a one-dimensional simulation model.
The iteration flow of the one-dimensional simulation model is shown in fig. 3, and after the one-dimensional simulation model starts simulation, the one-dimensional simulation model sends an instruction three-dimensional simulation reduced-order model to inform the three-dimensional simulation reduced-order model of starting simulation.
The one-dimensional simulation model starts to calculate a first step, simulation is carried out based on input one-dimensional data, after the simulation is started for a preset time, input parameters and inlet boundary parameters are sent to the three-dimensional simulation reduced-order model, the input parameters can be simulation time step, and the inlet boundary parameters can be data such as fluid temperature and flow.
After receiving the transfer parameters sent by the one-dimensional simulation model, the three-dimensional simulation reduced-order model starts a first resolving step to obtain an output result, wherein the output result comprises the output parameters and the outlet boundary parameters, and the output result is sent to the one-dimensional simulation model.
The one-dimensional simulation model is based on the output result of the three-dimensional simulation reduced-order model and the one-dimensional data simulation result of the one-dimensional simulation model to iterate to convergence.
After the one-dimensional simulation end obtains the output data of the three-dimensional simulation end, iterating until convergence, advancing calculation, entering the next time step, and repeating the steps until the simulation is finished.
In some embodiments, the method for constructing the multi-scale model of the ship power system provided by the invention is shown in fig. 4, and comprises the following steps:
step 410, dividing the ship power system into different levels of subsystems, equipment, parts and the like according to the running and energy transfer characteristics of the ship power system, and determining the coupling simulation framework.
And step 420, constructing a three-dimensional simulation database, constructing a data matrix according to the transmission parameters, performing matrix decomposition by adopting a Sirovich method, extracting feature vectors, determining base coefficients, and obtaining a three-dimensional simulation reduced model based on eigenvalue orthogonal decomposition under the condition of meeting accuracy.
Step 430, based on basic theory such as conservation equation, a basic theory equation set is established, a basic theory model library is established based on Modelica language, and one-dimensional simulation models of parts, equipment, subsystems, systems and the like are sequentially established from bottom to top.
Step 440, starting a one-dimensional simulation model, carrying out initialization setting, carrying out one-dimensional simulation calculation, sending transfer parameters to a three-dimensional simulation reduced-order model, sending a result to the one-dimensional simulation model by the three-dimensional simulation reduced-order model, and repeating iteration until the simulation is finished.
In summary, according to the method for constructing the multi-scale model of the ship power system, the ship power system is divided into a plurality of layers, and a coupling simulation frame is constructed based on the plurality of layers; wherein, coupling simulation framework includes: the transfer relation between the one-dimensional simulation model and the three-dimensional simulation reduced-order model of the ship power system; acquiring a three-dimensional simulation database of a corresponding part or equipment of the ship power system, and acquiring a data matrix based on the coupling simulation frame and the three-dimensional simulation database; extracting feature vectors of the data matrix, carrying out orthogonal decomposition on the feature vectors to obtain base vectors, and determining base coefficients to obtain a three-dimensional simulation reduced-order model; based on the coupling simulation framework, a one-dimensional simulation model coupled with the three-dimensional simulation reduced-order model is obtained.
Compared with the prior art, in each simulation analysis of the ship power system, the calculation iteration of the computational fluid dynamics numerical method is required to be called once to obtain the corresponding three-dimensional data simulation result, however, in the process of calling the computational fluid dynamics numerical method, the discrete form of the differential equation is required to be solved in a discrete space, and in the solving process, iteration convergence is required to be continuously carried out, so that excessive time is consumed.
The method comprises the steps of obtaining a three-dimensional simulation database of a ship power system corresponding to a part or equipment, and obtaining a data matrix based on a coupling simulation frame and the three-dimensional simulation database; the method has the advantages that the characteristic vectors of the data matrix are extracted, orthogonal decomposition is carried out on the characteristic vectors, a three-dimensional simulation reduced order model is obtained, the differential method is not needed to be solved in the process, three-dimensional data simulation is realized by adopting the three-dimensional simulation reduced order model, the time required by simulation operation can be greatly reduced, the simulation efficiency is improved, and the convergence problem is avoided.
According to the method provided by the invention, at a three-dimensional simulation end, a three-dimensional simulation database covering all target working condition ranges is constructed, and a three-dimensional simulation reduced-order model based on intrinsic orthogonal decomposition is adopted, so that three-dimensional detailed distribution of target parameters and high-fidelity rapid prediction of equipment macroscopic characteristics are realized; and through data transmission between the one-dimensional simulation model and the three-dimensional simulation reduced-order model, the one-dimensional-three-dimensional coupling simulation of the ship power system is realized efficiently and rapidly.
The method provided by the invention is used for carrying out simulation prediction on a typical ship power system, and under the condition that the parameter macroscopic characteristic is equivalent to the prediction precision of a computational fluid dynamics numerical method, the prediction speed of the three-dimensional simulation reduced-order model is increased by more than 200 times, the one-dimensional and three-dimensional coupling simulation speed is increased by more than 200 times, and the one-dimensional and three-dimensional rapid and high-efficiency coupling simulation is realized.
The multi-scale model construction device of the ship power system provided by the invention is described below, and the multi-scale model construction device of the ship power system described below and the multi-scale model construction method of the ship power system described above can be correspondingly referred to each other.
As shown in fig. 5, the multi-scale model construction device 500 of the ship power system provided by the present invention includes: a frame construction module 510, a matrix construction module 520, a first model construction module 530, and a second model construction module 540.
The frame construction module 510 is configured to divide the ship power system into a plurality of levels, and construct a coupling simulation frame based on the plurality of levels; wherein, coupling simulation framework includes: and the transmission relation between the one-dimensional simulation model and the three-dimensional simulation reduced-order model of the ship power system.
The matrix construction module 520 is configured to obtain a three-dimensional simulation database of a corresponding part or device of the ship power system, and obtain a data matrix of the target parameter based on the coupling simulation frame and the three-dimensional simulation database.
The first model construction module 530 extracts a feature vector corresponding to a maximum feature value of the data matrix, constructs an eigenvector of the target parameter based on the feature vector, determines a base coefficient, and obtains a three-dimensional simulation reduced-order model of the transfer parameter based on the base vector and the base coefficient.
The second model building module 540 is configured to obtain a one-dimensional simulation model coupled to the three-dimensional simulation reduced-order model based on the coupling simulation framework.
In some embodiments, matrix construction module 520 includes: a first computing unit, a second computing unit and a third computing unit.
The first calculation unit is used for obtaining a three-dimensional simulation operation range and a parameter boundary based on the design and operation requirements of the ship power system.
The second calculation unit is used for determining a three-dimensional simulation calculation sample space based on the three-dimensional simulation running range and the parameter boundary.
The third calculation unit is used for carrying out three-dimensional numerical simulation on the three-dimensional simulation calculation sample space to obtain a three-dimensional simulation database.
In some embodiments, the multi-scale model building apparatus 500 of the marine power system further comprises: and the simulation data acquisition module and the model updating module.
The simulation data acquisition module is used for acquiring the local or equipment three-dimensional simulation data of the ship power system under the target working condition of the ship power system.
The model updating module is used for comparing the output result of the three-dimensional simulation reduced-order model with the local or equipment three-dimensional simulation data of the ship power system under the target working condition, and updating the three-dimensional simulation reduced-order model based on the comparison result.
In some embodiments, the second model building module 540 includes: the system comprises a function acquisition unit, a model library construction unit and a second model construction unit.
The function acquisition unit is used for obtaining a one-dimensional simulation function corresponding to the ship power system based on the coupling simulation frame.
The model library construction unit is used for constructing a theoretical model library based on the one-dimensional simulation function.
The second model construction unit is used for carrying out model construction on the ship power system based on the theoretical model library to obtain a one-dimensional simulation model.
In some embodiments, the multi-scale model building apparatus 500 of the marine power system further comprises: the device comprises a parameter setting module, a first sending module and a second sending module.
The parameter setting module is used for setting simulation time step and iteration precision for the one-dimensional simulation model.
The first sending module is used for sending the one-dimensional data to be transmitted to the three-dimensional simulation reduced order model to obtain an output result.
The second sending module is used for sending the output result to the one-dimensional simulation model and carrying out iterative updating on the one-dimensional simulation model.
The electronic device and the storage medium provided by the invention are described below, and the electronic device and the storage medium described below and the method for constructing the multi-scale model of the ship power system described above can be correspondingly referred to each other.
Fig. 6 illustrates a physical schematic diagram of an electronic device, as shown in fig. 6, which may include: processor 610, communication interface (Communications Interface) 620, memory 630, and communication bus 640, wherein processor 610, communication interface 620, and memory 630 communicate with each other via communication bus 640. Processor 610 may invoke logic instructions in memory 630 to perform a method of multi-scale model construction of a marine vessel power system, the method comprising:
step 110, dividing a ship power system into a plurality of layers, and constructing a coupling simulation frame based on the layers; wherein, coupling simulation framework includes: the transfer relation between the one-dimensional simulation model and the three-dimensional simulation reduced-order model of the ship power system;
step 120, acquiring a three-dimensional simulation database of a corresponding part or equipment of the ship power system, and acquiring a data matrix of the target parameters based on the coupling simulation frame and the three-dimensional simulation database;
130, extracting a feature vector corresponding to the maximum feature value of the data matrix, constructing an eigenvector of an eigenvector decomposition base of a target parameter based on the feature vector, determining a base coefficient, and obtaining a three-dimensional simulation reduced-order model of a transfer parameter based on the base vector and the base coefficient;
and 140, obtaining a one-dimensional simulation model coupled with the three-dimensional simulation reduced-order model based on the coupling simulation framework.
Further, the logic instructions in the memory 630 may be implemented in the form of software functional units and stored in a computer-readable storage medium when sold or used as a stand-alone product. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
In another aspect, the present invention also provides a computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions which, when executed by a computer, enable the computer to perform a method of constructing a multi-scale model of a marine power system provided by the above methods, the method comprising:
step 110, dividing a ship power system into a plurality of layers, and constructing a coupling simulation frame based on the layers; wherein, coupling simulation framework includes: the transfer relation between the one-dimensional simulation model and the three-dimensional simulation reduced-order model of the ship power system;
step 120, acquiring a three-dimensional simulation database of a corresponding part or equipment of the ship power system, and acquiring a data matrix of the target parameters based on the coupling simulation frame and the three-dimensional simulation database;
130, extracting a feature vector corresponding to the maximum feature value of the data matrix, constructing an eigenvector of an eigenvector decomposition base of a target parameter based on the feature vector, determining a base coefficient, and obtaining a three-dimensional simulation reduced-order model of a transfer parameter based on the base vector and the base coefficient;
and 140, obtaining a one-dimensional simulation model coupled with the three-dimensional simulation reduced-order model based on the coupling simulation framework.
In yet another aspect, the present invention also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, is implemented to perform the above-provided multi-scale model building method of a marine power system, the method comprising:
step 110, dividing a ship power system into a plurality of layers, and constructing a coupling simulation frame based on the layers; wherein, coupling simulation framework includes: the transfer relation between the one-dimensional simulation model and the three-dimensional simulation reduced-order model of the ship power system;
step 120, acquiring a three-dimensional simulation database of a corresponding part or equipment of the ship power system, and acquiring a data matrix of the target parameters based on the coupling simulation frame and the three-dimensional simulation database;
130, extracting a feature vector corresponding to the maximum feature value of the data matrix, constructing an eigenvector of an eigenvector decomposition base of a target parameter based on the feature vector, determining a base coefficient, and obtaining a three-dimensional simulation reduced-order model of a transfer parameter based on the base vector and the base coefficient;
and 140, obtaining a one-dimensional simulation model coupled with the three-dimensional simulation reduced-order model based on the coupling simulation framework.
The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on this understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the respective embodiments or some parts of the embodiments.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. The method for constructing the multi-scale model of the ship power system is characterized by comprising the following steps of:
dividing a ship power system into a plurality of levels, and constructing a coupling simulation frame based on the levels; wherein the coupling simulation framework comprises: the transfer relation between the one-dimensional simulation model and the three-dimensional simulation reduced-order model of the ship power system;
acquiring a three-dimensional simulation database of the local or equipment of the ship power system, and obtaining a data matrix of target parameters based on the coupling simulation frame and the three-dimensional simulation database;
extracting a feature vector corresponding to the maximum feature value of the data matrix, constructing an eigenvector of the target parameter based on the feature vector, determining a base coefficient, and obtaining a three-dimensional simulation reduced-order model of the target parameter based on the base vector and the base coefficient;
based on the coupling simulation framework, a one-dimensional simulation model coupled with the three-dimensional simulation reduced-order model is obtained;
the obtaining the three-dimensional simulation database of the corresponding part or equipment of the ship power system comprises the following steps:
based on the design and operation requirements of the ship power system, a three-dimensional simulation operation range and a parameter boundary are obtained;
determining a three-dimensional simulation calculation sample space based on the three-dimensional simulation operation range and the parameter boundary;
and performing three-dimensional numerical simulation on the three-dimensional simulation calculation sample space to obtain the three-dimensional simulation database.
2. The method for constructing a multi-scale model of a marine vessel power system according to claim 1, further comprising:
acquiring local or equipment three-dimensional simulation data of the ship power system under the target working condition of the ship power system;
and under the target working condition, comparing the output result of the three-dimensional simulation reduced-order model with local or equipment three-dimensional simulation data of the ship power system, and updating the three-dimensional simulation reduced-order model based on the comparison result.
3. The method for constructing a multi-scale model of a ship power system according to claim 1, wherein the obtaining a one-dimensional simulation model coupled with the three-dimensional simulation reduced-order model based on the coupling simulation frame comprises:
based on the coupling simulation framework, obtaining a one-dimensional simulation function corresponding to the ship power system;
constructing a theoretical model library based on the one-dimensional simulation function;
and carrying out model construction on the ship power system based on the theoretical model library to obtain the one-dimensional simulation model.
4. A method of constructing a multi-scale model of a marine vessel power system according to any one of claims 1-3, further comprising:
setting a simulation time step and iteration precision for the one-dimensional simulation model;
transmitting the one-dimensional data to be transmitted to the three-dimensional simulation reduced order model to obtain an output result;
and sending the output result of the reduced-order model to the one-dimensional simulation model, and carrying out iterative updating on the one-dimensional simulation model.
5. A multi-scale model building device for a ship power system, comprising:
the system comprises a frame construction module, a coupling simulation frame, a simulation module and a control module, wherein the frame construction module is used for dividing a ship power system into a plurality of levels and constructing the coupling simulation frame based on the levels; wherein the coupling simulation framework comprises: the transfer relation between the one-dimensional simulation model and the three-dimensional simulation reduced-order model of the ship power system;
the matrix construction module is used for acquiring a three-dimensional simulation database of the corresponding part or equipment of the ship power system and obtaining a data matrix of the target parameters based on the coupling simulation frame and the three-dimensional simulation database;
the first model construction module is used for extracting a feature vector corresponding to the maximum feature value of the data matrix, constructing an eigenvector of the target parameter based on the feature vector, determining a base coefficient, and obtaining a three-dimensional simulation reduced-order model of the transfer parameter based on the base vector and the base coefficient;
the second model building module is used for obtaining a one-dimensional simulation model coupled with the three-dimensional simulation reduced-order model based on the coupling simulation framework;
the matrix construction module comprises:
the first calculation unit is used for obtaining a three-dimensional simulation operation range and a parameter boundary based on the design and operation requirements of the ship power system;
the second calculation unit is used for determining a three-dimensional simulation calculation sample space based on the three-dimensional simulation operation range and the parameter boundary;
and the third calculation unit is used for carrying out three-dimensional numerical simulation on the three-dimensional simulation calculation sample space to obtain the three-dimensional simulation database.
6. The multi-scale model construction device of a ship power system according to claim 5, further comprising:
the simulation data acquisition module is used for acquiring local or equipment three-dimensional simulation data of the ship power system under the target working condition of the ship power system;
and the model updating module is used for comparing the output result of the three-dimensional simulation reduced-order model with the local or equipment three-dimensional simulation data of the ship power system under the target working condition, and updating the three-dimensional simulation reduced-order model based on the comparison result.
7. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the method for constructing a multiscale model of a marine vessel power system according to any one of claims 1 to 4 when the program is executed.
8. A non-transitory computer readable storage medium having stored thereon a computer program, characterized in that the computer program, when executed by a processor, implements the steps of the multi-scale model building method of a marine vessel power system according to any of claims 1 to 4.
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