CN109989890B - Method, device, equipment and medium for designing steel cylindrical tower of wind generating set - Google Patents
Method, device, equipment and medium for designing steel cylindrical tower of wind generating set Download PDFInfo
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- CN109989890B CN109989890B CN201711482341.7A CN201711482341A CN109989890B CN 109989890 B CN109989890 B CN 109989890B CN 201711482341 A CN201711482341 A CN 201711482341A CN 109989890 B CN109989890 B CN 109989890B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
- F03D13/20—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/728—Onshore wind turbines
Abstract
The invention discloses a method, a device, equipment and a medium for designing a steel cylindrical tower of a wind generating set. The method comprises the following steps: after determining the geometric parameters of the steel cylindrical tower body of the wind generating set according to the tower design instruction and a preset parameter library, adjusting the wall thickness of the tower to meet the technical requirements of the tower; determining the geometric parameters of the door opening of the tower by using a preset parameter library and/or a preset template library, and changing the length of the door frame of the door opening extending out of the tower according to a preset standard library so as to meet the technical requirements of the door opening; determining the geometric parameters of the flange of the tower by utilizing a preset parameter library and/or a preset template library, and changing the bolt specification of the flange and/or the thickness of the flange according to a preset specification library so as to meet the technical requirements of the flange; and determining the steel cylindrical tower of the wind generating set. By adopting the scheme of the embodiment of the invention, the tower design efficiency can be improved while the research and development period of the tower can be shortened.
Description
Technical Field
The invention relates to the field of wind power generation, in particular to a method, a device, equipment and a medium for designing a steel cylindrical tower of a wind generating set.
Background
The steel cylindrical tower of the wind generating set is a main supporting component of the wind generating set, and the top end of the steel cylindrical tower supports key components such as a hub assembly, a generator, a base and the like. The steel cylindrical tower of the wind generating set, which is referred to as the tower in the following, is about 50% of the total weight of the wind generating set, and the cost of the tower is about 15% -20% of the manufacturing cost of the wind generating set.
During the life cycle of the tower, the weight of the nacelle, the effect of the wind force and various loads caused by the operation of the wind power system need to be borne, and the strength failure, the fatigue failure and the overturning do not occur, so that the static strength, the fatigue damage and the buckling of the components of the tower need to be examined.
In recent years, previously developed standard towers have not been used to meet practical requirements, and custom design of towers has been required.
At present, the traditional tower frame is designed to split the relation between different design contents, which inevitably causes a great amount of repeated modification in the design process, and therefore, the technical problem of long research and development period exists.
Disclosure of Invention
The embodiment of the invention provides a method, a device, equipment and a medium for designing a cylindrical steel tower of a wind generating set, which can shorten the research and development period of the tower and improve the design efficiency of the tower.
The embodiment of the invention provides a design method of a steel cylindrical tower of a wind generating set, which comprises the following steps:
after determining the geometric parameters of the steel cylindrical tower body of the wind generating set according to the tower design instruction and a preset parameter library, adjusting the wall thickness of the tower to meet the technical requirements of the tower;
determining the geometric parameters of the door opening of the tower by utilizing the preset parameter library and/or the preset template library based on the wall thickness of the tower meeting the technical requirements of the tower, and changing the length of the door frame of the door opening extending out of the tower according to a preset standard library so as to meet the technical requirements of the door opening;
determining the geometric parameters of a flange of the tower by utilizing the preset parameter library and/or the preset template library based on the wall thickness of the tower meeting the technical requirements of the tower, and changing the bolt specification of the flange and/or the thickness of the flange according to the preset specification library to meet the technical requirements of the flange;
and determining the steel cylindrical tower of the wind generating set according to the wall thickness of the tower meeting the technical requirements of the tower, the length of the door frame extending out of the tower meeting the technical requirements of a door opening, the specification of the bolt meeting the technical requirements of a flange and the thickness of the flange.
According to an aspect of an embodiment of the invention, the tower design instructions comprise tower body height information and tower body outer diameter information. After the geometric parameters of the steel cylindrical tower main body of the wind generating set are determined according to the tower design instruction and the preset parameter library, the wall thickness of the tower is adjusted to meet the technical requirements of the tower, and the method comprises the following steps:
determining initial values of the lengths of a plurality of tower sections of the tower body and the wall thickness of the tower according to a preset parameter library;
after the geometric parameters of the steel cylindrical tower body of the wind generating set are determined based on the height information of the tower body, the outer diameter information of the tower body, the lengths of a plurality of tower sections of the tower body and the initial value of the wall thickness of the tower, the wall thickness of the tower is adjusted according to a preset wall thickness step length to meet the technical requirements of the tower.
According to an aspect of an embodiment of the present invention, the determining, based on the wall thickness of the tower meeting the tower specification, the geometric parameter of the flange of the tower using the preset parameter library and/or the preset template library, and changing the bolt specification of the flange and/or the thickness of the flange according to the preset specification library to meet the flange specification includes:
determining the geometric parameters of the flange of the tower by utilizing the preset parameter library and/or the preset template library based on the wall thickness of the tower meeting the technical requirements of the tower, wherein the geometric parameters of the flange of the tower comprise the initial thickness value and the initial bolt specification value of the flange;
and adjusting the bolt specification according to the preset specification library and the initial bolt specification value to determine that the bolt specification meets the technical requirement of the flange.
According to an aspect of an embodiment of the present invention, the determining, based on the wall thickness of the tower meeting the tower specification, the geometric parameter of the flange of the tower using the preset parameter library and/or the preset template library, and changing the bolt specification of the flange and/or the thickness of the flange according to the preset specification library to meet the flange specification includes:
determining that the bolt specification threshold value of the flange in the preset parameter library and/or the preset template library cannot meet the technical requirement of the flange based on the wall thickness of the tower meeting the technical requirement of the tower and the preset specification library;
and adjusting the thickness of the flange by utilizing the preset parameter library and/or the preset template library, and determining that the thickness of the flange meets the technical requirements of the flange.
According to an aspect of an embodiment of the invention, the tower specifications comprise: the method comprises the following steps of meeting the equivalent stress requirement of a tower body, meeting the accumulated damage requirement of the tower body and meeting the buckling value requirement of the tower body.
According to an aspect of an embodiment of the invention, the door opening specification comprises: the door opening stress equivalent requirement, the door opening accumulated damage requirement and the door opening comprehensive buckling value requirement.
According to an aspect of an embodiment of the invention, the flange technical requirements include: the safety margin requirement of the tower flange and the accumulated damage requirement of the flange connecting bolt.
The embodiment of the invention provides a device for designing a steel cylindrical tower of a wind generating set, which comprises:
the first adjusting module is used for adjusting the wall thickness of the tower to meet the technical requirements of the tower after determining the geometric parameters of the cylindrical steel tower body of the wind generating set according to the tower design instruction and a preset parameter library;
the second adjusting module is used for determining the geometric parameters of the door opening of the tower by utilizing the preset parameter library and/or the preset template library based on the wall thickness of the tower meeting the technical requirements of the tower, and changing the length of the door frame of the door opening extending out of the tower according to a preset standard library so as to meet the technical requirements of the door opening;
the third adjusting module is used for determining the geometric parameters of the flange of the tower by utilizing the preset parameter library and/or the preset template library based on the wall thickness of the tower meeting the technical requirements of the tower, and changing the bolt specification of the flange and/or the thickness of the flange according to the preset specification library so as to meet the technical requirements of the flange;
and the determining module is used for determining the steel cylindrical tower of the wind generating set according to the wall thickness of the tower meeting the technical requirements of the tower, the length of the door frame extending out of the tower meeting the technical requirements of a door opening, the specification of the bolt meeting the technical requirements of a flange and the thickness of the flange.
According to an aspect of an embodiment of the invention, the tower design instructions comprise tower body height information and tower body outer diameter information; the first adjustment module includes:
the first determining submodule is used for determining initial values of the lengths of a plurality of tower sections of the tower body and the wall thickness of the tower according to a preset parameter library;
and the first adjusting submodule is used for adjusting the wall thickness of the tower to meet the technical requirements of the tower according to a preset wall thickness step length after determining the geometric parameters of the steel cylindrical tower body of the wind generating set based on the height information of the tower body, the outer diameter information of the tower body, the lengths of the multiple tower sections of the tower body and the initial value of the wall thickness of the tower.
According to an aspect of the embodiment of the present invention, the third adjusting module includes:
the second determining submodule is used for determining the geometric parameters of the flange of the tower by utilizing the preset parameter library and/or the preset template library based on the wall thickness of the tower meeting the technical requirements of the tower, wherein the geometric parameters of the flange of the tower comprise the initial thickness value and the initial bolt specification value of the flange;
and the second adjusting submodule is used for adjusting the bolt specification according to the preset specification library and the initial value of the bolt specification to determine that the bolt specification meets the technical requirement of the flange.
According to an aspect of the embodiment of the present invention, the third adjusting module includes:
the third determining submodule is used for determining that the bolt specification threshold value of the flange in the preset parameter library and/or the preset template library cannot meet the technical requirement of the flange based on the wall thickness of the tower meeting the technical requirement of the tower and the preset specification library;
and the third adjusting submodule is used for adjusting the thickness of the flange by utilizing the preset parameter library and/or the preset template library and determining that the thickness of the flange meets the technical requirement of the flange.
According to an aspect of an embodiment of the invention, the tower specifications comprise: the method comprises the following steps of meeting the equivalent stress requirement of a tower body, meeting the accumulated damage requirement of the tower body and meeting the buckling value requirement of the tower body.
According to an aspect of an embodiment of the invention, the door opening specification comprises: the door opening stress equivalent requirement, the door opening accumulated damage requirement and the door opening comprehensive buckling value requirement.
According to an aspect of an embodiment of the invention, the flange technical requirements include: the safety margin requirement of the tower flange and the accumulated damage requirement of the flange connecting bolt.
The embodiment of the invention provides a steel cylinder tower frame design device of a wind generating set, which comprises:
a memory for storing a program;
and the processor is used for operating the program stored in the memory so as to execute the design method of the steel cylindrical tower of the wind generating set provided by the embodiment of the invention.
The embodiment of the invention provides a computer readable storage medium, wherein computer program instructions are stored on the computer readable storage medium, and the computer program instructions are characterized in that when being executed by a processor, the computer program instructions realize the design method of the steel cylindrical tower of the wind generating set provided by the embodiment of the invention.
According to the technical scheme, the method, the device, the equipment and the medium for designing the steel cylindrical tower of the wind generating set can determine the geometric parameters of the door opening and the geometric parameters of the flange by utilizing the preset parameter library and/or the preset template library, and the tower design efficiency is improved. According to the design method, the device, the equipment and the medium of the steel cylindrical tower of the wind generating set, the research and development period of the tower can be shortened, the design efficiency of the tower can be improved, various technical requirements can be met, and the cost is lowest.
Drawings
The present invention will be better understood from the following description of specific embodiments thereof taken in conjunction with the accompanying drawings, in which like or similar reference characters designate like or similar features.
FIG. 1 is a schematic flow chart of a design process of a steel cylindrical tower of a wind generating set in an embodiment of the invention;
FIG. 2 is a schematic flow chart of a design method of a steel cylindrical tower of a wind generating set in the embodiment of the invention;
FIG. 3 is a schematic structural diagram of a design device of a steel cylindrical tower of a wind generating set in the embodiment of the invention;
FIG. 4 is a block diagram of an exemplary hardware architecture of a wind turbine generator set steel tubular tower design apparatus according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.
Typically, the tower comprises: the tower comprises a tower body, a door opening and a flange, so the design of the tower mainly comprises the design of the tower body, the design of the door opening and the design of the flange. In the process of manually designing the tower, a plurality of departments need to be spanned simultaneously to design the tower main body, the door opening and the flange respectively, a large amount of manpower is consumed in the whole research and development process, and the research and development period is long. Therefore, a tower design method capable of improving tower design efficiency while shortening the tower development cycle is needed.
Referring to fig. 1, a schematic design flow diagram of a steel cylindrical tower of a wind generating set in the embodiment of the invention is shown. As shown in fig. 1, a schematic design flow diagram of a steel cylindrical tower of a wind turbine generator system in an embodiment of the present invention includes: a data storage layer, an application service layer and a user interface layer.
The data storage layer, the application service layer and the user interface layer are described in turn below.
The data storage layer is used for storing various data required by the tower design process and mainly comprises the following steps: parameter library, specification library, template library and example library.
Wherein various parameters in the tower design process are stored in the parameter library. As an example, the parameter library stores geometrical parameters of the tower body, geometrical parameters of the door opening, geometrical parameters of the flange and various engineering material parameters. As an example, the geometric parameters of the flange stored in the parameter library may include: the length of the arc section of the flange sector, the outer diameter of the flange, the distance from the inner surface of the flange to the center of the bolt, the thickness of the cylinder wall at the flange and the thickness of the flange. As a specific example, the thickness of the flange in the parameter library may be several flange thicknesses commonly used in tower design, or the thickness of the flange in the parameter library may be an arithmetic progression, the values at the two ends of the progression are the minimum value of the thickness of the flange and the maximum value of the thickness of the flange respectively, and the step length of the progression is a fixed value.
Various assembly constraints in the tower design process are stored in the specification library. As an example, the specification library stores tower specifications, door opening specifications, and flange specifications. As a specific example, the tower technical requirement includes an equivalent stress requirement on the tower main body, and the equivalent stress requirement on the tower main body in the specification library includes a calculation expression of the equivalent stress on the tower main body and an equivalent stress threshold value on the tower main body.
Various template files in the tower design process are stored in the template library. As an example, a three-dimensional model of each component of the tower and a skeleton model of the tower are stored in the template library, wherein the three-dimensional model of the component comprises parameter information of the component and contour information of the component. As an example, only 3 to 4 door openings are commonly used in the tower design process, and the three-dimensional models of the 3 to 4 door openings can be stored in a template library. When the door opening needs to be designed in the design process of the tower, the three-dimensional model of the door opening can be directly called from the module library.
Examples of a variety of typical towers are stored in the example library. An example of a typical tower in the example library contains all data for the typical tower, wherein all data for the typical tower includes all data to be considered in the tower design process, and the typical tower satisfies the constraints stored in the specification library. As an example, when a typical tower needs to be designed by using the steel cylindrical tower design system of the wind generating set according to the embodiment of the present invention, if it is determined that all data of the typical tower are stored in the example library, all data of the typical tower can be directly called in the example library.
The application service layer is used for accessing the data service layer through the data access interface and rapidly designing the tower by utilizing various data in the data service layer, and comprises the following steps: the system comprises a tower configuration module, an analysis and calculation module and a parameterized design module.
In the design process of the tower, the tower configuration module configures various geometric parameters of the tower by calling a parameter library and/or a template library of the data storage layer. As an example, the tower configuration module requires parameter configuration of the tower body, door opening and flange.
The analysis and calculation module is used for analyzing whether each component of the tower meets the assembly constraint condition in the specification library.
And the parametric design module is used for changing the parameters of a component of the tower when the component is determined not to meet the assembly constraint condition, and inputting the changed parameters into the analysis and calculation module again.
And the user interface layer is used for realizing interaction between a user and the design flow of the steel cylindrical tower of the wind generating set in the embodiment of the invention.
Based on the design flow schematic diagram of the steel cylindrical tower of the wind generating set provided by the embodiment of the invention, the embodiment of the invention provides a design method of the steel cylindrical tower of the wind generating set.
Referring to fig. 2, a flow chart of a design method of a steel cylindrical tower of a wind generating set in the embodiment of the invention is shown. As shown in fig. 2, a method 200 for designing a steel cylindrical tower of a wind turbine generator system in an embodiment of the present invention specifically includes the following steps:
s210, after determining the geometric parameters of the steel cylindrical tower body of the wind generating set according to the tower design instruction and a preset parameter library, adjusting the wall thickness of the tower to meet the technical requirements of the tower.
In some embodiments of the invention, the tower design instructions include tower body height information and tower body outer diameter information. S210 specifically includes:
and S211, receiving a tower design command.
In some embodiments of the invention, the height of the tower body and the length of the outer diameter of the tower body are determined in advance. Therefore, the tower design command includes tower body height information and tower body outer diameter information.
In S211, the height of the tower body and the length of the outer diameter of the tower body are determined based on the tower design command, so that the remaining parameters except the height of the tower body and the length of the outer diameter of the tower body need to be adjusted in the subsequent process.
S212, determining initial values of the lengths of the tower sections of the tower body and the wall thickness of the tower according to a preset parameter library.
In S212, during installation of the tower, the tower needs to be transported from the production site of the tower to the installation site of the tower. Since each transportation mode has limitations on the size and weight of the goods, it is impossible to directly transport an entire tower to the installation site of the tower for installation. Therefore, it is necessary to divide an entire tower body into several tower segments, transport the several tower segments to an installation site, and then flange the several tower segments to form the tower body. Thus, during tower design, the number of tower sections and the length of each tower section needs to be determined. As an example, where the received tower design instructions identify a tower body height of 100 meters, the division of the tower body into 4 tower sections may be selected in a parameter library, and the length of each tower section may be selected in the parameter library.
In some embodiments of the present invention, in a scenario where the wall thickness values of the plurality of towers are stored in the preset parameter library, the initial value of the wall thickness of the tower may be the minimum value of the wall thickness values of the plurality of towers.
S213, after determining the geometric parameters of the steel cylindrical tower body of the wind generating set based on the height information of the tower body, the outer diameter information of the tower body, the lengths of a plurality of tower sections of the tower body and the initial value of the wall thickness of the tower, adjusting the wall thickness of the tower according to a preset wall thickness step length to meet the technical requirements of the tower.
In some embodiments of the invention, the tower specifications include the equivalent stress σ to which the tower body is subjectedvRequirement, cumulative damage of the Tower body DvRequired and tower body buckling value ftotalvAnd (4) requiring.
In an embodiment of the invention, in the coordinate system of the tower, a direction vertically upward along the axis of the tower body is taken as a z direction, and on a horizontal plane perpendicular to the z direction, optionally, a horizontal direction is an x direction; on a horizontal plane perpendicular to the z-direction, the direction perpendicular to the x-direction is taken as the y-direction. Wherein, the x direction, the y direction and the z direction satisfy the right hand rule.
Equivalent stress sigma to the main body of the towervIs required to satisfy expression (1):
wherein M isxy,gesThe total bending moment on the tower section comprises eccentric additional bending moment; wxyIs the bending section modulus of the tower; fzIs an axial force acting on the section of the tower; a is the cross-sectional area of the tower; mzIs the tower torque in the axial z-direction; wtIs the torsional section modulus of the tower; fxySynthesizing shearing force for acting on the x direction of the tower and acting on the y direction of the tower;
expressed as the allowable tower stress. The allowable tower stress represents the maximum stress value that the tower components are allowed to withstand during the tower design process. The allowable stress can be set to different values according to different geographical environments of the position where the wind generating set is located and different heights of the tower.
Tower body cumulative damage DvIs required to satisfy expression (2):
wherein n isFRepresenting the number of stress intervals of the tower; n is a radical ofiThe stress cycle number of the ith stress interval in the Markov matrix is obtained; delta sigmaiThe stress variation range of the ith stress interval in the Markov matrix; gamma rayMA material polynomial coefficient for the tower; delta sigmaDFatigue for tower material stress-life curve inflection pointStrength; n is a radical ofDAnd the stress cycle times corresponding to the inflection point of the material stress-service life curve of the tower.
Tower body buckling value ftotalvIs required to satisfy expression (3):
wherein σx,EdThe axial stress value of the cylindrical shell is taken as the axial stress value; sigmax,RdThe design value of the actual axial instability critical stress of the cylindrical shell is obtained; k is a radical ofxIs the axial buckling index; k is a radical ofτIs the shear buckling index; tau isxθ,EdThe value of the shear stress borne by the cylindrical shell is shown; tau isxθ,RdAnd the design value of the actual shear instability critical stress of the cylindrical shell is obtained.
In some embodiments of the invention, in a scenario where the tower does not meet the technical requirements of the tower after the geometric parameters of the cylindrical steel tower body of the wind generating set are determined, the height information of the main body of the tower, the outer diameter information of the main body of the tower and the initial value of the wall thickness of the tower are calculated, and since the height information of the main body of the tower and the outer diameter information of the main body of the tower are determined by the tower design instructions, the wall thickness of the tower can be adjusted to meet the technical requirements of the tower.
In some embodiments of the present invention, in expression (1), WxyA and WtPositively related to the wall thickness of the tower, respectively σvInversely related to the wall thickness of the tower. As an example, σ can be made by increasing the wall thickness of the towervIs gradually reduced when
In time, the tower body meets the equivalent stress sigma borne by the tower bodyvAnd (4) requiring.
In the expression (2), Δ σiAnd Δ WxyInverse correlation, Δ WxyPositively related to the wall thickness of the tower, thus, Δ σiInversely related to the wall thickness of the tower, DvInversely related to the wall thickness of the tower. As an example, the wall thickness of the tower is continuously increased, following the towerIncreasing wall thickness DvGradually decrease when DvWhen the damage is less than or equal to 1, the tower body reaches the accumulated damage D of the tower bodyvAnd (4) requiring.
In expression (3), σx,EdAnd WxyInverse correlation, σx,EdInversely related to A, τxθ,EdInversely related to A, accordingly, σx,EdAnd τxθ,EdInversely related to the wall thickness of the tower, i.e. ftotalvIn relation to the wall thickness of the tower. As an example, increasing the wall thickness of the tower enables ftotalvDecrease, when the wall thickness of the tower increases to a certain value, ftotalvLess than or equal to 1, and the tower body accords with the buckling value f of the tower bodytotalvAnd (4) requiring.
Therefore, the wall thickness of the tower can be adjusted according to the preset wall thickness step length, so that the main body of the tower meets the equivalent stress sigma borne by the main body of the tower at the same timevRequirement, cumulative damage of the Tower body DvRequired and tower body buckling value ftotalvAnd (4) requiring.
S220, determining the geometric parameters of the door opening of the tower by utilizing a preset parameter library and/or a preset template library based on the wall thickness of the tower meeting the technical requirements of the tower, and changing the length of the door frame of the door opening extending out of the tower according to a preset standard library so as to meet the technical requirements of the door opening.
In some embodiments of the present invention, the preset parameter library and/or the preset geometric parameters of the door opening in the template library include: the method comprises the steps of measuring the height of a door opening, the width of the door opening, the thickness of a door frame, the length of the door frame and the initial value of the length of the door frame of the door opening extending out of a tower frame.
In some embodiments of the invention, door opening specifications include: equivalent stress sigma to door openingdoorRequirement, accumulated door opening Damage DdoorThe requirement and the comprehensive buckling value requirement of the door opening.
The equivalent stress to which the door opening is subjected is required to satisfy expression (4):
wherein, Scf is the equivalent stress coefficient, and Scf is larger than 1.
The accumulated damage requirement of the door opening meets the expression (5):
the requirement of the comprehensive buckling value of the door opening meets the expression (6)
Wherein, C1To reduce the coefficient, C1Less than 1.
In some embodiments of the present invention, since only 3 to 4 door openings are usually applied in practical engineering, geometric parameters of the 3 to 4 door openings (excluding the length of the door frame of the door opening extending out of the tower) can be preset into a parameter library or a template library during the design process of the tower. As each geometric parameter of the 3-4 door openings is fixed, after the geometric parameter of the door opening of the tower frame is determined by utilizing a preset parameter library and/or a preset template library, if the door opening does not accord with the technical requirement of the door opening, the length of the door frame of the door opening extending out of the tower frame can be adjusted.
In some embodiments of the invention, σ generally decreases as the Scf increases with the length of the tower from which the door frame of the door opening extendsdoorAnd DdoorWill decrease as the door frame of the door opening extends the length of the tower. Therefore, the length of the door frame of the door opening extending out of the tower frame can be adjusted, so that the door opening meets the requirement of equivalent stress borne by the door opening and the requirement of accumulated damage of the door opening.
In expression (6), C increases as the length of the door frame of the door opening extending out of the tower increases1Gradually decreases. When the length of the door frame of the door opening extending out of the tower frame is increased to a certain value, the door opening meets the requirement of the comprehensive buckling value of the door opening.
Therefore, the door opening can meet the technical requirements of the door opening by increasing the length of the door frame of the door opening extending out of the tower frame.
And S230, determining the geometric parameters of the flange of the tower by utilizing a preset parameter library and/or a preset template library based on the wall thickness of the tower meeting the technical requirements of the tower, and changing the bolt specification of the flange and/or the thickness of the flange according to a preset specification library to meet the technical requirements of the flange.
In some embodiments of the invention, the geometric parameters of the flange and the bolt specification which meet the national standard are preset in the parameter library or the template library. As an example, various parameters of M30-M64 bolt specifications commonly used in the wind power industry can be stored in a parameter library in advance, wherein the M30-M64 bolt specifications are bolt specifications specified in national standards. Or 3D models of bolts with the specifications of M30-M64 commonly used in the wind power industry can be stored in a model library in advance. As another example, the geometric parameters of the flanges in the parameter library or template library may include: the length of the arc section of the flange sector, the outer diameter of the flange, the thickness of a tower body at the flange, the thickness of a single flange, the distance from the inner surface of the flange to the center of a bolt and the distance from the inner surface of the tower to the center of the bolt.
In some embodiments of the present invention, S230 specifically includes:
s231, determining the geometric parameters of the flange of the tower by using a preset parameter library and/or a preset template library based on the wall thickness of the tower meeting the technical requirements of the tower, wherein the geometric parameters of the flange of the tower comprise the initial thickness value of the flange and the initial bolt specification value.
In some embodiments of the invention, flange specifications include: tower flange safety margin SRFU,FlRequirement and accumulated damage D of flange connecting boltboltAnd (4) requiring.
The tower flange safety margin requirement meets the expression (7):
wherein, FUThe ultimate tensile force is the ultimate tensile force of the tower cylinder flange in a failure mode; z is the vertical force acting on the one-piece flange.
The accumulated damage requirement of the flange connecting bolt meets the expression (8):
and S232, adjusting the bolt specification according to a preset specification library and the initial bolt specification value to determine that the bolt specification meets the technical requirement of the flange.
In some embodiments of the invention, the thread gauge is increased, and the nominal diameter of the bolt in the bolt gauge is increased.
In expression (7), since FUThe SRF can be adjusted by adjusting the bolt specification in relation to the nominal diameter of the boltU,FlAre increasing continuously. When the specification of the bolt is increased to a certain degree, the SRFU,FlAnd the flange is more than or equal to 1, and the safety margin requirement of the tower flange is met at the moment.
In expression (8), Δ σiInversely related to the nominal diameter of the bolt. With increasing nominal diameter of the bolt, DboltWill gradually decrease. Therefore, D can be gradually reduced by continuously increasing the specification of the boltboltWhen D is presentboltWhen the damage is less than or equal to 1, the flange meets the requirement of accumulated damage of the flange connecting bolt.
As an example, in a scenario where the parameter library stores M30-M64 bolt specifications commonly used in the wind power industry, the initial value of the bolt specification may be set to M30. When the specification of the bolt is M30, the flange is calculated to be incapable of meeting the technical requirements of the flange, and the SRF can be enabled to be in an SRF (stress relief function) mode by continuously increasing the specification of the boltU,FlD is not less than 1boltLess than or equal to 1, and the flange can meet the technical requirements of the flange.
In other embodiments of the present invention, S230 specifically includes:
s231', determining that the bolt specification threshold value of the flange in the preset parameter library and/or the preset template library cannot meet the technical requirement of the flange based on the wall thickness of the tower meeting the technical requirement of the tower and the preset specification library.
In some embodiments of the present invention, the bolt specification threshold value of the flange may be set to a maximum value of the bolt specifications stored in the preset parameter library and/or the preset template library. As an example, when various parameters of M30-M64 bolt specifications commonly used in the wind power industry are stored in the template library, the bolt specification threshold may be set to M64.
And S232', adjusting the thickness of the flange by using a preset parameter library and/or a preset template library, and determining that the thickness of the flange meets the technical requirements of the flange.
In S232', when the nominal diameter of the bolt is increased to the nominal diameter of the bolt in the bolt specification threshold, the flange still cannot meet the technical requirement of the flange, and at this time, the flange can meet the technical requirement of the flange by adjusting the thickness of the flange.
In some embodiments of the present invention, as the thickness of the flange increases, F in expression (7)UIncrease, Δ σ in expression (8)iAnd decreases. Therefore, when the thickness of the flange reaches a certain value, the flange meets the requirements of tower flange safety margin and flange connecting bolt accumulated damage.
It should be noted that, since S220 and S230 in the embodiment of the present invention are also performed based on that the wall thickness of the tower in S210 meets the technical requirements of the tower, and there is no order of execution between S220 and S230, the order of S220 and S230 is not limited by the numbering of S220 and S230 in the embodiment of the present invention. At this time, after S210, before S240, there are three possibilities for the sequence in which S220 and S230 proceed: s220 may be performed before S230, S220 may be performed after S230, or S220 and S230 may be performed simultaneously.
S240, determining the steel cylindrical tower of the wind generating set according to the wall thickness of the tower meeting the technical requirements of the tower, the length of the door frame extending out of the tower meeting the technical requirements of a door opening, the specification of bolts meeting the technical requirements of a flange and the thickness of the flange.
In some embodiments of the invention, after the wind turbine generator system steel cylindrical tower is determined, the parameters of the determined wind turbine generator system steel cylindrical tower may be stored in an example library.
According to the method for designing the steel cylindrical tower of the wind generating set, the geometrical parameters of the door opening and the geometrical parameters of the flange can be determined by utilizing the preset parameter library and/or the preset template library, so that the tower design efficiency is improved; the designed tower meets the technical requirements of the tower, the technical requirements of a door opening and the technical requirements of a flange by adjusting the wall thickness of the tower, the length of a door frame extending out of the tower, the specifications of bolts and the thickness of the flange; the initial value of the wall thickness of the tower, the initial value of the length of the door frame extending out of the tower, the initial value of the specification of the bolt and the initial value of the thickness of the flange are set as the minimum value of the wall thickness of the tower, the minimum value of the length of the door frame extending out of the tower, the minimum value of the specification of the bolt and the minimum value of the thickness of the flange in the parameter library and/or the template library, and then the wall thickness of the tower, the length of the door frame extending out of the tower, the specification of the bolt and the thickness of the flange are gradually increased, so that the wall thickness of. According to the design method of the steel cylindrical tower of the wind generating set, the research and development period of the tower can be shortened, the design efficiency of the tower can be improved, various technical requirements can be met, and the cost is lowest.
Referring to fig. 3, which is a schematic structural diagram of a device for designing a cylindrical steel tower of a wind turbine generator system according to an embodiment of the present invention, the device for designing a cylindrical steel tower of a wind turbine generator system corresponds to a method for designing a cylindrical steel tower of a wind turbine generator system, and the device 300 for designing a cylindrical steel tower of a wind turbine generator system specifically includes:
the first adjusting module 310 is configured to, after determining the geometric parameters of the cylindrical steel tower main body of the wind generating set according to the tower design instruction and the preset parameter library, adjust the wall thickness of the tower to meet the technical requirements of the tower.
In some embodiments of the invention, the tower design instructions include tower body height information and tower body outer diameter information.
A first determining module 310, comprising:
the first determining submodule is used for determining initial values of the lengths of a plurality of tower sections of the tower body and the wall thickness of the tower according to a preset parameter library;
and the first adjusting submodule is used for adjusting the wall thickness of the tower according to a preset wall thickness step length to meet the technical requirements of the tower after determining the geometric parameters of the steel cylindrical tower body of the wind generating set based on the main body height information of the tower, the main body outer diameter information of the tower, the length of a plurality of tower sections of the tower body and the initial value of the wall thickness of the tower.
In some embodiments of the invention, tower specifications include: the method comprises the following steps of meeting the equivalent stress requirement of a tower body, meeting the accumulated damage requirement of the tower body and meeting the buckling value requirement of the tower body.
And the second adjusting module 320 is used for determining the geometric parameters of the door opening of the tower by utilizing a preset parameter library and/or a preset template library based on the wall thickness of the tower meeting the technical requirements of the tower, and changing the length of the door frame of the door opening extending out of the tower according to a preset standard library so as to meet the technical requirements of the door opening.
In some embodiments of the invention, door opening specifications include: the door opening stress equivalent requirement, the door opening accumulated damage requirement and the door opening comprehensive buckling value requirement.
And the third adjusting module 330 is configured to determine geometric parameters of a flange of the tower by using a preset parameter library and/or a preset template library based on the wall thickness of the tower meeting the technical requirements of the tower, and change the bolt specification of the flange and/or the thickness of the flange according to a preset specification library to meet the technical requirements of the flange.
In some embodiments of the present invention, the third adjusting module 330 includes:
and the second determining submodule is used for determining the geometric parameters of the flange of the tower by utilizing a preset parameter library and/or a preset template library based on the wall thickness of the tower meeting the technical requirements of the tower, wherein the geometric parameters of the flange of the tower comprise the initial thickness value and the initial bolt specification value of the flange.
And the second adjusting submodule is used for adjusting the bolt specification according to the preset specification library and the initial value of the bolt specification to determine that the bolt specification meets the technical requirement of the flange.
In other embodiments of the present invention, the third adjusting module 330 includes:
and the third determining submodule is used for determining that the bolt specification threshold value of the flange in the preset parameter library and/or the preset template library cannot meet the technical requirement of the flange based on the wall thickness of the tower meeting the technical requirement of the tower and the preset specification library.
And the third adjusting submodule is used for adjusting the thickness of the flange by utilizing a preset parameter library and/or a preset template library and determining that the thickness of the flange meets the technical requirement of the flange.
In some embodiments of the invention, flange specifications include: the safety margin requirement of the tower flange and the accumulated damage requirement of the flange connecting bolt.
The determining module 340 is used for determining the steel cylindrical tower of the wind generating set according to the wall thickness of the tower meeting the technical requirements of the tower, the length of the door frame extending out of the tower meeting the technical requirements of a door opening, the bolt specification meeting the technical requirements of a flange and the thickness of the flange.
Fig. 4 is a block diagram illustrating an exemplary hardware architecture of a wind turbine generator system steel cylindrical tower design facility that can implement the wind turbine generator system steel cylindrical tower design method and apparatus according to an embodiment of the present invention.
As shown in FIG. 4, wind turbine generator set steel tubular tower design apparatus 400 includes an input apparatus 401, an input interface 402, a central processor 403, a memory 404, an output interface 405, and an output apparatus 406. The input interface 402, the central processing unit 403, the memory 404 and the output interface 405 are connected with each other through a bus 410, and the input device 401 and the output device 406 are connected with the bus 410 through the input interface 402 and the output interface 405 respectively, and further connected with other components of the wind turbine generator system steel cylindrical tower design device 400.
Specifically, the input device 401 receives input information from the outside and transmits the input information to the central processor 403 through the input interface 402; the central processor 403 processes the input information based on computer-executable instructions stored in the memory 404 to generate output information, stores the output information temporarily or permanently in the memory 404, and then transmits the output information to the output device 406 through the output interface 405; the output device 406 outputs the output information to the outside of the wind turbine generator system steel cylindrical tower design device 400 for use by a user.
That is, the wind turbine generator system steel tubular tower design apparatus shown in fig. 4 may also be implemented to include: a memory storing computer-executable instructions; and a processor which, when executing computer executable instructions, may implement the wind turbine generator set steel tubular tower design method and apparatus described in connection with fig. 2 and 3.
In one embodiment, the wind turbine generator set steel tubular tower design 400 shown in FIG. 4 may be implemented as an apparatus that may include: a memory for storing a program; and the processor is used for operating the program stored in the memory so as to execute the design method of the steel cylindrical tower of the wind generating set.
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; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (16)
1. A design method of a steel cylindrical tower of a wind generating set is characterized by comprising the following steps:
after determining the geometric parameters of a cylindrical steel tower body of the wind generating set according to a tower design instruction and a preset parameter library, adjusting the wall thickness of the tower to meet the technical requirements of the tower, wherein the parameter library stores the geometric parameters of the tower body, the geometric parameters of a door opening and the geometric parameters of a flange, and the technical requirements of the tower comprise the equivalent stress requirement borne by the tower body, the accumulated damage requirement of the tower body and the buckling value requirement of the tower body;
based on the wall thickness of the tower meeting the technical requirements of the tower, determining the geometric parameters of a door opening of the tower by using the preset parameter library and/or the preset template library, changing the length of a door frame of the door opening extending out of the tower according to a preset standard library so as to meet the technical requirements of the door opening, wherein the template library stores parameter information of each component of the tower, the standard library stores the technical requirements of the tower, the technical requirements of the door opening and the technical requirements of flanges, and the technical requirements of the door opening comprise: the door opening is subjected to equivalent stress requirements, door opening accumulated damage requirements and door opening comprehensive buckling value requirements;
determining the geometric parameters of a flange of the tower by utilizing the preset parameter library and/or the preset template library based on the wall thickness of the tower meeting the technical requirements of the tower, and changing the bolt specification of the flange and/or the thickness of the flange according to the preset specification library to meet the technical requirements of the flange, wherein the technical requirements of the flange comprise: the safety margin requirement of the tower flange and the accumulated damage requirement of the flange connecting bolt;
and determining the steel cylindrical tower of the wind generating set according to the wall thickness of the tower meeting the technical requirements of the tower, the length of the door frame extending out of the tower meeting the technical requirements of a door opening, the specification of the bolt meeting the technical requirements of a flange and the thickness of the flange.
2. The method for designing a steel cylindrical tower of a wind generating set according to claim 1, wherein the tower design instructions comprise tower body height information and tower body outer diameter information;
after the geometric parameters of the steel cylindrical tower main body of the wind generating set are determined according to the tower design instruction and the preset parameter library, the wall thickness of the tower is adjusted to meet the technical requirements of the tower, and the method comprises the following steps:
determining initial values of the lengths of a plurality of tower sections of the tower body and the wall thickness of the tower according to a preset parameter library;
after the geometric parameters of the steel cylindrical tower body of the wind generating set are determined based on the height information of the tower body, the outer diameter information of the tower body, the lengths of a plurality of tower sections of the tower body and the initial value of the wall thickness of the tower, the wall thickness of the tower is adjusted according to a preset wall thickness step length to meet the technical requirements of the tower.
3. The method for designing the steel cylindrical tower of the wind generating set according to claim 1, wherein the method for designing the steel cylindrical tower of the wind generating set according to the technical requirements of the tower comprises the following steps of determining the geometric parameters of a flange of the tower by using the preset parameter library and/or the preset template library based on the wall thickness of the tower which meets the technical requirements of the tower, and changing the bolt specification of the flange and/or the thickness of the flange according to the preset specification library so as to meet the technical requirements of the flange, wherein the method comprises the following steps:
determining the geometric parameters of the flange of the tower by utilizing the preset parameter library and/or the preset template library based on the wall thickness of the tower meeting the technical requirements of the tower, wherein the geometric parameters of the flange of the tower comprise the initial thickness value and the initial bolt specification value of the flange;
and adjusting the bolt specification according to the preset specification library and the initial bolt specification value to determine that the bolt specification meets the technical requirement of the flange.
4. The method for designing the steel cylindrical tower of the wind generating set according to claim 1, wherein the method for designing the steel cylindrical tower of the wind generating set according to the technical requirements of the tower comprises the following steps of determining the geometric parameters of a flange of the tower by using the preset parameter library and/or the preset template library based on the wall thickness of the tower which meets the technical requirements of the tower, and changing the bolt specification of the flange and/or the thickness of the flange according to the preset specification library so as to meet the technical requirements of the flange, wherein the method comprises the following steps:
determining that the bolt specification threshold value of the flange in the preset parameter library and/or the preset template library cannot meet the technical requirement of the flange based on the wall thickness of the tower meeting the technical requirement of the tower and the preset specification library;
and adjusting the thickness of the flange by utilizing the preset parameter library and/or the preset template library, and determining that the thickness of the flange meets the technical requirements of the flange.
5. The method for designing a steel cylindrical tower of a wind generating set according to claim 1, wherein the technical requirements of the tower comprise: the method comprises the following steps of meeting the equivalent stress requirement of a tower body, meeting the accumulated damage requirement of the tower body and meeting the buckling value requirement of the tower body.
6. The method for designing a steel cylindrical tower of a wind generating set according to claim 1, wherein the technical requirements of the door opening comprise: the door opening stress equivalent requirement, the door opening accumulated damage requirement and the door opening comprehensive buckling value requirement.
7. The method for designing a steel cylindrical tower of a wind generating set according to claim 1, wherein the flange technical requirements comprise: the safety margin requirement of the tower flange and the accumulated damage requirement of the flange connecting bolt.
8. A wind generating set steel cylindric tower design device characterized in that, the device includes:
the first adjusting module is used for adjusting the wall thickness of the tower to meet the technical requirements of the tower after determining the geometric parameters of a cylindrical steel tower main body of the wind generating set according to a tower design instruction and a preset parameter library, wherein the parameter library stores the geometric parameters of the tower main body, the geometric parameters of a door opening and the geometric parameters of a flange, and the technical requirements of the tower comprise an equivalent stress requirement borne by the tower main body, a cumulative damage requirement of the tower main body and a buckling value requirement of the tower main body;
the second adjusting module is used for determining the geometric parameters of the door opening of the tower by utilizing the preset parameter library and/or the preset template library based on the wall thickness of the tower meeting the technical requirements of the tower, changing the length of the door frame of the door opening extending out of the tower to meet the technical requirements of the door opening according to a preset standard library, wherein the template library stores the parameter information of each component of the tower, the standard library stores the technical requirements of the tower, the technical requirements of the door opening and the technical requirements of flanges, and the technical requirements of the door opening comprise: the door opening is subjected to equivalent stress requirements, door opening accumulated damage requirements and door opening comprehensive buckling value requirements;
a third adjusting module, configured to determine, based on a wall thickness of the tower that meets a technical requirement of the tower, a geometric parameter of a flange of the tower by using the preset parameter library and/or the preset template library, and change, according to the preset specification library, a bolt specification of the flange and/or a thickness of the flange to meet the technical requirement of the flange, where the technical requirement of the flange includes: the safety margin requirement of the tower flange and the accumulated damage requirement of the flange connecting bolt;
and the determining module is used for determining the steel cylindrical tower of the wind generating set according to the wall thickness of the tower meeting the technical requirements of the tower, the length of the door frame extending out of the tower meeting the technical requirements of a door opening, the specification of the bolt meeting the technical requirements of a flange and the thickness of the flange.
9. The wind turbine generator system steel cylindrical tower design device according to claim 8, wherein the tower design instructions include tower body height information and tower body outer diameter information; the first adjustment module includes:
the first determining submodule is used for determining initial values of the lengths of a plurality of tower sections of the tower body and the wall thickness of the tower according to a preset parameter library;
and the first adjusting submodule is used for adjusting the wall thickness of the tower to meet the technical requirements of the tower according to a preset wall thickness step length after determining the geometric parameters of the steel cylindrical tower body of the wind generating set based on the height information of the tower body, the outer diameter information of the tower body, the lengths of the multiple tower sections of the tower body and the initial value of the wall thickness of the tower.
10. The wind turbine generator system steel tubular tower design device of claim 8, wherein the third tuning module comprises:
the second determining submodule is used for determining the geometric parameters of the flange of the tower by utilizing the preset parameter library and/or the preset template library based on the wall thickness of the tower meeting the technical requirements of the tower, wherein the geometric parameters of the flange of the tower comprise the initial thickness value and the initial bolt specification value of the flange;
and the second adjusting submodule is used for adjusting the bolt specification according to the preset specification library and the initial value of the bolt specification to determine that the bolt specification meets the technical requirement of the flange.
11. The wind turbine generator system steel tubular tower design device of claim 8, wherein the third tuning module comprises:
the third determining submodule is used for determining that the bolt specification threshold value of the flange in the preset parameter library and/or the preset template library cannot meet the technical requirement of the flange based on the wall thickness of the tower meeting the technical requirement of the tower and the preset specification library;
and the third adjusting submodule is used for adjusting the thickness of the flange by utilizing the preset parameter library and/or the preset template library and determining that the thickness of the flange meets the technical requirement of the flange.
12. The wind turbine generator system steel tubular tower design device of claim 8, wherein the tower specifications comprise: the method comprises the following steps of meeting the equivalent stress requirement of a tower body, meeting the accumulated damage requirement of the tower body and meeting the buckling value requirement of the tower body.
13. The wind turbine generator system steel cylindrical tower design device of claim 8, wherein the door opening technical requirements comprise: the door opening stress equivalent requirement, the door opening accumulated damage requirement and the door opening comprehensive buckling value requirement.
14. The wind turbine generator system steel tubular tower design device of claim 8, wherein the flange specifications comprise: the safety margin requirement of the tower flange and the accumulated damage requirement of the flange connecting bolt.
15. A wind generating set steel cylindric tower design equipment, characterized in that, the equipment includes:
a memory for storing a program;
a processor for executing the program stored in the memory to perform the method of any of claims 1-7.
16. A computer-readable storage medium having computer program instructions stored thereon which, when executed by a processor, implement the method of any one of claims 1-7.
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| CN102434408A (en) * | 2011-12-23 | 2012-05-02 | 北京金风科创风电设备有限公司 | Wind generating set tower frame door opening and design method thereof |
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Address after: No.107 Shanghai Road, Urumqi Economic and Technological Development Zone, Urumqi City, Xinjiang Uygur Autonomous Region Patentee after: Jinfeng Technology Co.,Ltd. Address before: No.107 Shanghai Road, Urumqi Economic and Technological Development Zone, Urumqi City, Xinjiang Uygur Autonomous Region Patentee before: XINJIANG GOLDWIND SCIENCE & TECHNOLOGY Co.,Ltd. |