CN113177331A - SN curve automatic generation method and system based on specific data model - Google Patents
SN curve automatic generation method and system based on specific data model Download PDFInfo
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- CN113177331A CN113177331A CN202110622007.7A CN202110622007A CN113177331A CN 113177331 A CN113177331 A CN 113177331A CN 202110622007 A CN202110622007 A CN 202110622007A CN 113177331 A CN113177331 A CN 113177331A
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Abstract
The invention relates to the technical field of wind power generation, and particularly provides an SN curve automatic generation method based on a specific data model, which comprises the following steps: inputting a name of a new material, and selecting an SN curve material type and an SN curve data type; based on the selected SN curve material type and the selected SN curve data type, adopting a specific data model and inputting necessary input parameters to construct necessary characteristic point data of the SN curve so as to automatically draw the SN curve of the newly-built material; and generating an xml file which can be analyzed by fatigue analysis software based on the necessary input parameters and the constructed SN curve characteristic points. The invention also provides an SN curve automatic generation system based on the specific data model, which comprises an input module, an SN curve data calculation module and an SN curve file printing module, wherein an engineer can automatically generate the SN curve and the material file only by selecting the material type and inputting the main parameters on an operation interface, and the efficiency is high and the accuracy is high.
Description
Technical Field
The invention relates to the technical field of wind power generation, in particular to an SN curve automatic generation method and system based on a specific data model.
Background
An SN curve is commonly used in fatigue analysis of parts of a large-scale wind generating set, and the SN curve refers to a corresponding SN curve obtained by making raw materials into a standard test piece and obtaining the fatigue life under the actions of tension, compression, bending and torsion.
At present, an SN curve mainly comes from a material library of software, and the SN curve of a new material is edited by an engineer manually, so that time and labor are wasted, the error rate is high, different engineers can edit the SN curve in a different way, and the subsequent benchmarking analysis is not facilitated.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the method and the system for automatically generating the SN curve based on the specific data model, which aim to solve the technical problems that the SN curve of a new material is mainly edited manually by an engineer, time and labor are wasted, and the error rate is high.
In order to achieve the purpose, the invention is realized by the following technical scheme:
the invention provides a method for automatically generating an SN curve based on a specific data model, which comprises the following steps:
s1, inputting a name of a new material, and selecting an SN curve material type and an SN curve data type;
s2, based on the selected SN curve material type and SN curve data type, adopting a specific data model and inputting necessary input parameters to construct necessary characteristic point data of the SN curve so as to automatically draw the SN curve of the newly-built material;
s3, generating an xml file which can be analyzed by fatigue analysis software based on the necessary input parameters and the constructed SN curve characteristic points;
wherein the necessary parameters at least comprise material tensile limit, yield limit, surface roughness, casting grade, safety factor and notch factor.
Further, in step S1, the alternative SN curve material types include at least a casting material, a forging material, and a welding material.
Further, in step S1, the data types of the SN curve that can be selected at least include a Haigh curve, a multiple stress ratio curve, a multiple average stress curve, and a standard SN curve.
Further, the specific data model is pre-manufactured by adopting the following steps:
s21, packaging the various SN curve calculation models into modules;
s22, integrating derivation formulas of various parameters required by constructing an SN curve into the module;
and S23, developing an SN curve file printing module, prefabricating various SN curve file formats, and automatically printing the generated various SN curve data into material files according to the formats.
In a second aspect of the present invention, there is provided a system for automatically generating an SN curve based on a specific data model, including:
an input module: the system is used for inputting new material names and selecting SN curve material types and SN curve data types;
SN curve data calculation Module: the method is used for automatically constructing necessary characteristic point data of the SN curve by adopting a specific data model and inputting necessary input parameters based on the selected SN curve material type and the selected SN curve data type;
SN curve file print module: the system comprises a database, a fatigue analysis software and a database, wherein the database is used for storing the necessary input parameters and constructed SN curve characteristic points;
wherein the necessary parameters at least comprise material tensile limit, yield limit, surface roughness, casting grade, safety factor and notch factor.
The system further comprises a storage module used for storing the information of the newly-built materials, and the input module is also used for modifying the material information stored in the storage module.
According to the technical scheme, the invention has the beneficial effects that:
1) by adopting the method and the system for automatically generating the SN curve based on the specific data model, an engineer does not need to manually compile the SN curve and edit a material file, and only needs to select the material type and input main parameters on an operation interface, the SN curve and the material file can be automatically generated, so that the efficiency is high;
2) the automatically generated SN curve is formulated by a program, so that the influence of artificial uncertain factors is avoided, and the consistency is high;
3) the method has high goodness of fit with test data, and the curve calculation adds correction from years of engineering practice and test experience, so that the obtained curve has high fitting degree with engineering results;
4) the automatically generated SN curve engineer does not worry about writing errors, and even engineers who do not know fatigue analysis can operate SN curve generation.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
FIG. 1 is a flow chart illustrating steps of a method for automatically generating an SN curve based on a specific data model;
FIG. 2 is a flow chart of steps for specifying a data model;
FIG. 3 is one embodiment of an SN curve automatic generation system based on a particular data model.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
Referring to fig. 1, the method for automatically generating an SN curve based on a specific data model according to the present invention includes the following steps:
s1, inputting a name of a new material, and selecting an SN curve material type and an SN curve data type;
the SN curve material type is selected, common wind turbine fatigue materials are classified in the system, the system mainly comprises casting materials (QT 400, QT500 and the like), forging materials (42 CrMo, 34CrNiMo6 and the like) and welding materials (Q235, Q345 and the like), and interfaces are reserved in other materials in the system and can be increased according to needs;
selecting the data types of the SN curves, wherein different types of SN curves need to be constructed for different fatigue analysis methods of the wind generating set parts, and the types of the SN curves which can be selected by the system comprise; a Haigh curve, a multiple stress ratio curve, a multiple average stress curve, and a standard SN curve.
S2, based on the selected SN curve material type and SN curve data type, adopting a specific data model and inputting necessary input parameters to construct necessary characteristic point data of the SN curve so as to automatically draw the SN curve of the newly-built material;
according to various curve models, a specific SN curve data calculation module is developed in a background, the data model is constructed according to GL2010 standards, information comprises the use range and the category of SN curve generation, main parameters of the SN curve generation and input information of the main table, and part of input data interfaces are normalized or selected by combining years of engineering and test experience, so that the material curve is guaranteed to be highly consistent with the actual engineering. The data model can complete the automatic construction of necessary characteristic point data of the SN curve through the data relation and the characteristics of the fatigue curve; wherein the necessary parameters at least comprise material tensile limit, yield limit, surface roughness, casting grade, safety factor and notch coefficient;
s3, generating an xml file which can be analyzed by fatigue analysis software based on the necessary input parameters and the constructed SN curve characteristic points; the SN curve file printing module is used for prefabricating printing formats of various curves, automatically converting the calculated data into XML character strings according to the format of the selected SN curve, and printing and outputting the XML character strings to the XML file, namely forming a material file. In one embodiment, the generated material file is automatically imported into a system material library management module for management and displayed in a material list, the material list provides functions of inquiry and deletion except for creating and editing materials, and submitted instructions can be executed through the material library management module and then displayed on the material list. The XML file can be downloaded from the system material library list, fatigue analysis software is opened, the XML file is imported into the Ncode material library, and a template file in mxd format is formed for calling during fatigue strength analysis.
As a further improvement to the above solution, the specific data model is pre-fabricated by the following steps:
s21, packaging the various SN curve calculation models into modules to standardize and accumulate knowledge; repeated editing is avoided, the efficiency is improved, and the difference caused by people is reduced;
s22, integrating engineering experience values or derivation formulas of various parameters required by the construction of the SN curve into the module to ensure that the material curve is consistent with the actual height of the engineering;
s23, developing an SN curve file printing module, prefabricating various SN curve file formats, and automatically printing the generated various SN curve data into a material file according to the formats so as to be convenient and practical for engineering.
Referring to fig. 2, the present invention further provides an SN curve automatic generation system based on a specific data model, including:
an input module: the system is used for inputting new material names and selecting SN curve material types and SN curve data types;
SN curve data calculation Module: the method is used for automatically constructing necessary characteristic point data of the SN curve by adopting a specific data model and inputting necessary input parameters based on the selected SN curve material type and the selected SN curve data type;
SN curve file print module: the system comprises a database, a fatigue analysis software and a database, wherein the database is used for storing the necessary input parameters and constructed SN curve characteristic points;
the optional SN curve material types at least comprise casting materials, forging materials and welding materials; the data types of the SN curve at least comprise a Haigh curve, a multi-stress ratio curve, a multi-average stress curve and a standard SN curve; the necessary parameters at least comprise material tensile limit, yield limit, surface roughness, casting grade, safety factor and notch coefficient.
As a further improvement to the above solution, the system further includes a storage module for storing information of the newly-built material, and the input module is further configured to modify the material information stored in the storage module.
In one embodiment, referring to fig. 3, a tool software system is developed, which integrates the above functional modules, has a front end and a back end, displays the created materials in a tabulated manner, and provides new creation, editing, searching, deleting and downloading functions; interface parameter input interfaces are provided when various SN curve materials are created, so that the SN curve materials are popular and easy to understand, and the efficiency and the accuracy are improved; after the front end finishes parameter input, the system automatically calls the corresponding model to execute the processes of curve data calculation, material file generation, database import and the like.
The SN curve automatic generation method and the system based on the specific data model have the following beneficial effects that:
1) by adopting the method and the system for automatically generating the SN curve based on the specific data model, an engineer does not need to manually compile the SN curve and edit a material file, and only needs to select the material type and input main parameters on an operation interface, the SN curve and the material file can be automatically generated, so that the efficiency is high and the accuracy is high;
2) the automatically generated SN curve is formulated by a program, so that the influence of artificial uncertain factors is avoided, and the consistency is high;
3) the method has high goodness of fit with test data, and the curve calculation adds correction from years of engineering practice and test experience, so that the obtained curve has high fitting degree with engineering results;
4) the automatically generated SN curve engineer does not worry about writing errors, and even engineers who do not know fatigue analysis can operate SN curve generation.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
Claims (6)
1. An SN curve automatic generation method based on a specific data model is characterized by comprising the following steps:
s1, inputting a name of a new material, and selecting an SN curve material type and an SN curve data type;
s2, based on the selected SN curve material type and SN curve data type, adopting a specific data model and inputting necessary input parameters to construct necessary characteristic point data of the SN curve so as to automatically draw the SN curve of the newly-built material;
s3, generating an xml file which can be analyzed by fatigue analysis software based on the necessary input parameters and the constructed SN curve characteristic points;
wherein the necessary parameters at least comprise material tensile limit, yield limit, surface roughness, casting grade, safety factor and notch factor.
2. The method for automatically generating SN curves based on specific data models according to claim 1, wherein in step S1, the selectable SN curve material types at least comprise casting materials, forging materials and welding materials.
3. The method as claimed in claim 1, wherein in step S1, the data types of the SN curve that can be selected at least include Haigh curve, multi-stress ratio curve, multi-average stress curve and standard SN curve.
4. The method according to claim 1, wherein the specific data model is pre-created by the following steps:
s21, packaging the various SN curve calculation models into modules;
s22, integrating derivation formulas of various parameters required by constructing an SN curve into the module;
and S23, developing an SN curve file printing module, prefabricating various SN curve file formats, and automatically printing the generated various SN curve data into material files according to the formats.
5. An automatic SN curve generation system based on a specific data model, comprising:
an input module: the system is used for inputting new material names and selecting SN curve material types and SN curve data types;
SN curve data calculation Module: the method is used for automatically constructing necessary characteristic point data of the SN curve by adopting a specific data model and inputting necessary input parameters based on the selected SN curve material type and the selected SN curve data type;
SN curve file print module: the system comprises a database, a fatigue analysis software and a database, wherein the database is used for storing the necessary input parameters and constructed SN curve characteristic points;
wherein the necessary parameters at least comprise material tensile limit, yield limit, surface roughness, casting grade, safety factor and notch factor.
6. The system of claim 5, further comprising a storage module for storing information of the new material, wherein the input module is further configured to modify the information of the material stored in the storage module.
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