CN106250646A - A kind of Optimization Design of tower barrel of wind generating set flange - Google Patents
A kind of Optimization Design of tower barrel of wind generating set flange Download PDFInfo
- Publication number
- CN106250646A CN106250646A CN201610650345.0A CN201610650345A CN106250646A CN 106250646 A CN106250646 A CN 106250646A CN 201610650345 A CN201610650345 A CN 201610650345A CN 106250646 A CN106250646 A CN 106250646A
- Authority
- CN
- China
- Prior art keywords
- flange
- centerdot
- bolt
- single hop
- tower
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/17—Mechanical parametric or variational design
Landscapes
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Pure & Applied Mathematics (AREA)
- Mathematical Optimization (AREA)
- Mathematical Analysis (AREA)
- Computer Hardware Design (AREA)
- Evolutionary Computation (AREA)
- General Engineering & Computer Science (AREA)
- Computational Mathematics (AREA)
- Wind Motors (AREA)
Abstract
The invention belongs to wind-driven generator technical group field, disclose the Optimization Design of a kind of tower barrel of wind generating set flange, basic theories based on Mathematical Planning, the mechanical model that annular flange connects is reduced to single hop Flange joint, with the structural parameters of tower drum flange as design variable, the failure mode of four kinds of theories of plasticity, spanner space and the bolt hole back gauge of bolt a size of about restraint condition, set up the mathematical programming model using the cumulative volume of flange and bolt as object function, optimized algorithm is finally used to solve the flange connection that the cumulative volume obtaining making flange and bolt is minimum.It is the lightest and meet the optimized flange connection of four kinds of failure modes of flange Plastic Design that application the method obtains quality.This method is easily programmed realization, it is possible to reduce the amount of calculation of designer, improves rapidity and the accuracy of design.
Description
Technical field
The present invention relates to wind-driven generator technical group field, particularly relate to the optimization of a kind of tower barrel of wind generating set flange
Method for designing.
Background technology
MW class wind turbine group tower many employings drum type brake steel tower at present.Drum type brake steel tower is generally divided into
Multistage, every section of tower end welded flange, tower is combined by each section of flange with bolts.The operation of wind-driven generator
Bad environments, stand under load is complicated, and the safety that the security relationship of tower structure to complete machine is run, therefore the design of tower drum flange becomes
Obtain extremely important.
For tower drum flange, elastic design is guarded very much, and can increase construction cost.Therefore in GL specification
Regulation tower drum flange design calculate use plastic joint theory, i.e. Petersens method (failure mode A and failure mode B) and
Seidel method (failure mode D and failure mode E).The method is applicable to L-type and T-flange.Petersen method and Seidel method
Annular flange is connected and is reduced to single hop flange link model, as long as it is shown in figure 1, the bolt of single hop model and flange are in the limit
Do not lost efficacy under the effect of load, then annular flange connection also will meet requirement of strength.Single hop flange attachment force model is carried out
Bold simplification, as in figure 2 it is shown, its calculated results is substantially consistent with experimental data thus is widely used.
The connection of mecystasis lower flange has 4 kinds of failure modes, as it is shown on figure 3, the ultimate tension at tower wall is necessarily less than and results from
The tensile bearing capacity of four kinds of failure modes.
Use said method to carry out flange design, in the case of known load, tower wall thickness and tower external diameter, need not
Disconnected trial amendment flange size parameter (parameter a, b, n, t as shown in Figure 4) and diameter of bolt d carry out tentative calculation and meet four kinds of inefficacies
Pattern.This amount of calculation for designer is very big, and final design result is it cannot be guaranteed that flange connection
Quality the gentliest change.
Summary of the invention
Embodiments of the invention provide the Optimization Design of a kind of tower barrel of wind generating set flange, to realize tower method
The quality of flange connection structure is the gentliest changed, it is proposed that tower drum flange method for designing based on Mathematical Planning, it is easy to programming realization, permissible
Quick and precisely obtain design result.
For reaching above-mentioned purpose, embodiments of the invention adopt the following technical scheme that and are achieved.
The Optimization Design of a kind of tower barrel of wind generating set flange, comprises annular flange, described ring in described tower
The cross section of shape flange is L-type, and described annular flange is linked in sequence by multiple single hop flanges and forms, and described method includes walking as follows
Rapid:
Step 1, determines the ultimate bending moment that tower outer diameter D t, tower wall thickness s and annular flange kernel of section are subject to
M, and set the diameter d of bolt;
Step 2, by distance a of annular flange inside edge to bolt axis, distance b of bolt axis to barrel center, ring
Shape flange thickness t, bolt quantity n as design variable, build object function G:
Wherein, object function G represents the cumulative volume of single hop flange and bolt, n > 0, t > 0;
Step 3, the ultimate bending moment being subject to according to described tower outer diameter D t, tower wall thickness s, annular flange kernel of section
M and bolt quantity n calculates single hop flange tension;
Step 4, sets and solves described bound for objective function, and described constraints includes: described single hop flange is subject to
The pulling force arrived meets spanner spatial design rule less than the tensile bearing capacity of single hop flange, spanner bulk during assembling bolt
Model, bolt hole back gauge size meets bolt hole back gauge design specification;
Step 5, according to described object function and constraints, sets up mathematical programming model, solves described Mathematical Planning
Model, obtains the one group design variable minimum so that described object function, and single hop flange corresponding to this group design variable and
The cumulative volume of bolt;
Step 6, resets the diameter d of bolt, and is repeated in step 2 to step 5, until obtaining organizing design change more
Amount, and organize single hop flange corresponding to design variable and the cumulative volume of bolt more;
Step 7, the one group of design choosing the cumulative volume so that single hop flange and bolt in many group design variables minimum becomes
Measure the structural parameters as single hop Flange joint.
The feature of technical solution of the present invention and being further improved to:
(1) step 3 specifically includes:
Count according to ultimate bending moment M that described tower outer diameter D t, tower wall thickness s and annular flange kernel of section are subject to
Calculation single hop flange tension Z:
Wherein, n is bolt quantity, DsFor tower barrel central diameter, Ds=Dt-s.
(2), in step 4, single hop flange tension specifically includes less than the tensile bearing capacity of single hop flange:
(4a) under failure mode A, the tensile bearing capacity Z of single hop flangeA=FT, Rd, FT, RdTension for single bolt is held
Load power:
Wherein, K is partial safety factor, AsFor bolt stress area, γMFor material factor, fubFor bolt ultimate tensile;
Failure mode A to be met, single hop flange tension Z is necessarily less than the anti-of under failure mode A single hop flange
Draw bearing capacity, i.e. meet ZAV-Z > 0, v are reduction coefficient, v < 1;
(4b) under failure mode B, the tensile bearing capacity of single hop flangeWherein, losing efficacy
Bending drag M of barrel under Mode BPl, 3b:
Wherein,C is the approximate width of single hop flange model, fysAllowable for tower barrel
Yield strength, fydYield strength allowable for annular flange;
Failure mode B to be met, single hop flange tension Z is necessarily less than the anti-of under failure mode B single hop flange
Draw bearing capacity, i.e. meet ZBV-Z > 0, v are reduction coefficient, v < 1;
(4c) under failure mode D, the tensile bearing capacity of single hop flangeWherein, at bolt hole
The addition bend drag M ' that single hop flanges bend drag and bolt bias producePl, 2:
Bending drag M of barrel under failure mode DPl, 3d:
C '=c-dB
bD=b
Wherein, c ' is the approximate width of the single hop flange model after reduction at bolt hole, dBFor the diameter of bolt hole, dSFor
Washer outer diameter, bDDistance for bolt axis to barrel plastic hinge;
Failure mode D to be met, single hop flange tension Z is necessarily less than the anti-of under failure mode D single hop flange
Draw bearing capacity, i.e. meet ZDV-Z > 0, v are reduction coefficient, v < 1;
(4d) under failure mode E, the tensile bearing capacity of single hop flangeWherein, at inefficacy mould
Bending drag M of barrel under formula EPl, 3e:
MPl, 2For single hop flanges bend drag, bEDistance for gasket width center to plastic hinge;
Failure mode E to be met, single hop flange tension Z is necessarily less than the anti-of under failure mode E single hop flange
Draw bearing capacity, i.e. meet ZEV-Z > 0, v are reduction coefficient, v < 1.
(3), in step 4, spanner bulk during assembling bolt meets spanner spatial design specification, particularly as follows:
Obtain according to the design specification that JB/ZQ 4005-2006 specifies: minimum between tower annular flange connecting bolt
Circumferential distance A2 and minimum spacing E1 of bolt distance barrel, thus obtain following constraints:
(Dt-2·b-s)·π/n≥0
b-s/2-E1≥0
Wherein, Dt represents tower external diameter, and s represents tower wall thickness, and b represents the bolt axis distance to barrel center, n
Representing bolt quantity, E1 represents the minimum spacing of bolt distance barrel.
(4), in step 4, bolt hole back gauge size meets bolt hole back gauge design specification, particularly as follows:
According to the regulation of EN 1993-1-8 [4], bolt hole center to structure edge distance more than or equal to bolt aperture
1.2 times, thus obtain following constraints:
a-1.2·dB≥0
Wherein, a represents the annular flange inside edge distance to bolt axis, dBRepresent the diameter of bolt hole.
(5), in step 5, according to described object function and constraints, mathematical programming model is set up as follows:
Object function:
Constraints: ZiV-Z > 0 (i=A, B, D, E)
(Dt-2·b-s)·π/n≥0
b-s/2-E1≥0
a-1.2·dB≥0
N > 0
T > 0
Wherein, Dt represents tower external diameter, and s represents tower wall thickness, and M represents the limit that annular flange kernel of section is subject to
Moment of flexure, d represents the diameter of bolt, and a represents the annular flange inside edge distance to bolt axis, and b represents that bolt axis is to barrel
The distance at center, t represents annular flange thickness, and n represents bolt quantity, Zi(i=A, B, C, D) represents at failure mode A, B, C
Or the tensile bearing capacity of single hop flange under D, Z represents single hop flange tension, and v is reduction coefficient, and E1 represents bolt distance
The minimum spacing of barrel, dBRepresent diameter of bolt hole.
Present invention basic theories based on Mathematical Planning, is reduced to single hop flange even by the mechanical model that annular flange connects
Connect, with the structural parameters of tower drum flange as design variable, the failure mode of four kinds of theories of plasticity, the spanner space of bolt and bolt
Hole back gauge a size of about restraints condition, sets up the mathematical programming model using the cumulative volume of flange and bolt as object function, finally
Optimized algorithm is used to solve the flange connection that the cumulative volume obtaining making flange and bolt is minimum.Application the method obtains quality
The lightest and meet the optimized flange connection of four kinds of failure modes of flange Plastic Design.This method is easily programmed realization,
The amount of calculation of designer can be reduced, improve rapidity and the accuracy of design.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
In having technology to describe, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to
Other accompanying drawing is obtained according to these accompanying drawings.
The annular flange model simplification schematic diagram that Fig. 1 provides for the embodiment of the present invention;
The mechanical simplified model schematic diagram of the Flange joint that Fig. 2 provides for the embodiment of the present invention;
Four kinds of failure mode mechanical model schematic diagrams of plastic joint theory that Fig. 3 provides for the embodiment of the present invention;
The flange connection parameter schematic diagram that Fig. 4 provides for the embodiment of the present invention;
The flow process signal of the Optimization Design of the tower barrel of wind generating set flange that Fig. 5 provides for the embodiment of the present invention
Figure.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under not making creative work premise
Embodiment, broadly falls into the scope of protection of the invention.
The embodiment of the present invention provides the Optimization Design of a kind of tower barrel of wind generating set flange, comprises in described tower
Annular flange, described annular flange cross section is L-type, and described annular flange is linked in sequence by multiple single hop flanges and forms, such as Fig. 5
Shown in, described method comprises the steps:
Step 1, determines the ultimate bending moment that tower outer diameter D t, tower wall thickness s and annular flange kernel of section are subject to
M, and set the diameter d of bolt.
Step 2, by distance a of annular flange inside edge to bolt axis, distance b of bolt axis to barrel center, ring
Shape flange thickness t, bolt quantity n as design variable, build object function G:
Wherein, object function G represents the cumulative volume of single hop flange and bolt, n > 0, t > 0.
Step 3, the ultimate bending moment being subject to according to described tower outer diameter D t, tower wall thickness s, annular flange kernel of section
M and bolt quantity n calculates single hop flange tension.
Step 3 specifically includes:
Count according to ultimate bending moment M that described tower outer diameter D t, tower wall thickness s and annular flange kernel of section are subject to
Calculation single hop flange tension Z:
Wherein, n is bolt quantity, DsFor tower barrel central diameter, Ds=Dt-s.
Step 4, sets and solves described bound for objective function, and described constraints includes: described single hop flange is subject to
The pulling force arrived meets spanner spatial design rule less than the tensile bearing capacity of single hop flange, spanner bulk during assembling bolt
Model, bolt hole back gauge size meets bolt hole back gauge design specification.
In step 4, single hop flange tension specifically includes less than the tensile bearing capacity of single hop flange:
(4a) under failure mode A, when L-type flange is thicker, under the effect of additional pulling force, L-type flange is sent out hardly
Change shape, and high-strength bolt is by bigger pulling force, after there is bigger elongation, reaches high-strength bolt ultimate tension capacity,
Final bolt abruption and L-type flange are still in elastic stage, as shown in Figure 3.The now tensile bearing capacity Z of single hop flangeA=
FT, Rd, FT, RdTensile bearing capacity for single bolt:
Wherein, K is partial safety factor, ASFor bolt stress area, γMFor material factor, fubFor bolt ultimate tensile;
Failure mode A to be met, single hop flange tension Z is necessarily less than the anti-of under failure mode A single hop flange
Draw bearing capacity, owing to actual flange design can carry out rounding to the value solving the design variable that mathematical programming model obtains, for
Guarantee that the design variable after rounding meets institute's Prescribed Properties, tensile bearing capacity is carried out suitable reduction, i.e. meets ZAV-Z >
0, v is reduction coefficient, v < 1;
(4b) under failure mode B, the failure mode of failure mode B is that L-type flange forms plastic hinge and bolt at root
Damage inactivation.This failure mode occur in the rigidity of L-type flange and high-strength bolt close time, under the effect of additional pulling force, L
After the deformation of type flange and high-strength bolt tension, elongation is close.Flange and bolt almost can reach capacity bearing capacity state,
Final bolt is pulled off, and flange root forms plastic hinge, as shown in Figure 3.The now tensile bearing capacity of single hop flangeWherein, bending drag M of barrel under failure mode BPl, 3b:
Wherein,C is the approximate width of single hop flange model, fysAllowable for tower barrel
Yield strength, fydYield strength allowable for annular flange;
It should be noted that MPl, 3bFor the bending drag of flange or barrel, take the two smaller value.Owing to flange thickness is general
More than wall thickness, simplification herein processes and takes barrel bending drag.
Failure mode B to be met, single hop flange tension Z is necessarily less than the anti-of under failure mode B single hop flange
Draw bearing capacity, i.e. meet ZBV-Z > 0, v are reduction coefficient, v < 1;
(4c) under failure mode D, surrender at the root of L-type flange and bolt position.When the bolt rigidity connected is more than L
During the rigidity of type flange or tower barrel, the deformation of L-type flange is more than high-strength bolt elongation, and flange periphery forms thick stick earlier
Stick force, during destruction, the position of plastic hinge and distribution are as shown in Figure 3.The now tensile bearing capacity of single hop flangeWherein, the addition bend drag that at bolt hole, single hop flanges bend drag and bolt bias produce
M′Pl, 2:
Bending drag M of barrel under failure mode DPl, 3d:
C '=c-dB
bD=b
Wherein, c ' is the approximate width of the single hop flange model after reduction at bolt hole, dBFor diameter of bolt hole, dSFor pad
Circle external diameter, bDDistance for bolt axis to barrel plastic hinge;
Failure mode D to be met, single hop flange tension Z is necessarily less than the anti-of under failure mode D single hop flange
Draw bearing capacity, i.e. meet ZDV-Z > 0, v are reduction coefficient, v < 1;
(4d) under failure mode E, failure mode E is root and the surrender of packing ring root position of L-type flange.When connect
When packing ring rigidity is more than the rigidity of L-type flange or tower barrel, the deformation of L-type flange is more than high-strength bolt elongation, flange
Edge forms lever force earlier, and during destruction, the position of plastic hinge and distribution are as shown in Figure 3.The now tensile bearing capacity of single hop flangeWherein, bending drag M of barrel under failure mode EPl, 3e:
MPl, 2For single hop flanges bend drag, bEDistance for gasket width center to plastic hinge;
Failure mode E to be met, single hop flange tension Z is necessarily less than the anti-of under failure mode E single hop flange
Draw bearing capacity, i.e. meet ZEV-Z > 0, v are reduction coefficient, v < 1.
In step 4, spanner bulk during assembling bolt meets spanner spatial design specification, particularly as follows:
Obtain according to the design specification that JB/ZQ 4005-2006 specifies: minimum between tower single hop flange bolt
Circumferential distance A2 and minimum spacing E1 of bolt distance barrel, thus obtain following constraints;
(Dt-2·b-s)·π/n≥0
b-s/2-E1≥0
Wherein, Dt represents tower external diameter, and s represents tower wall thickness, and b represents the bolt axis distance to barrel center, n
Representing bolt quantity, E1 represents the minimum spacing of bolt distance barrel.
In step 4, bolt hole back gauge size meets bolt hole back gauge design specification, particularly as follows:
According to the regulation of EN 1993-1-8, bolt hole center to structure edge distance more than or equal to the 1.2 of bolt aperture
Times, thus obtain following constraints:
a-1.2·dB≥0
Wherein, a represents the annular flange inside edge distance to bolt axis, dBRepresent the diameter of bolt hole.
Step 5, according to described object function and constraints, sets up mathematical programming model, solves described Mathematical Planning
Model, obtains the one group design variable minimum so that described object function, and single hop flange corresponding to this group design variable and
The cumulative volume of bolt.
In step 5, according to described object function and constraints, set up mathematical programming model as follows:
Object function:
Constraints: ZiV-Z > 0 (i=A, B, D, E)
(Dt-2·b-s)·π/n≥0
b-s/2-E1≥0
a-1.2·dB≥0
N > 0
T > 0
Wherein, Dt represents tower external diameter, and s represents tower wall thickness, and M represents the limit that annular flange kernel of section is subject to
Moment of flexure, d represents the diameter of bolt, and a represents the annular flange inside edge distance to bolt axis, and b represents that bolt axis is to barrel
The distance at center, t represents annular flange thickness, and n represents bolt quantity, Zi(i=A, B, C, D) represents at failure mode A, B, C
Or the tensile bearing capacity of single hop flange under D, Z represents single hop flange tension, and v is reduction coefficient, and E1 represents bolt distance
The minimum spacing of barrel, dBRepresent diameter of bolt hole.
Mathematical programming model derived above is a nonlinear mathematics programming model, solves it, is designed
Variable (exemplary, can be L-type flange arrangement parameter a, b, n, numerical value t), and corresponding single hop flange and bolt
Cumulative volume.
Further, use Direct search algorithm (Direct search algorithms) to nonlinear mathematics programming mould
Type solves.
Step 6, resets the diameter d of bolt, and is repeated in step 2 to step 5, until obtaining organizing design change more
Amount, and organize single hop flange corresponding to design variable and the cumulative volume of bolt more.
Step 7, the one group of design choosing the cumulative volume so that single hop flange and bolt in many group design variables minimum becomes
Measure the structural parameters as single hop Flange joint.
According to existing example and experience, after the diameter that bolt is varied multiple times and relevant parameter, several groups of L-types can be obtained
Flange arrangement parameter value, and flange and the cumulative volume of bolt accordingly.Through contrast, one group of numerical value of volume minimum is
Excellent solution.
Solve the design variable value that mathematical programming model obtains and be generally floating number, have certain decimal digits, for bolt
It is integer that the such parameter of quantity n has clearly a need for rounding, and remaining flange parameter is typically also required to rounding in actual design and rounds
Number or priority number.Design variable after rounding is designed checking for four failure modes, if by, obtain optimal solution,
If not passing through, revising reduction coefficient v, redesigning.
The method for designing that the present invention describes is applicable to the flange that cross section is L-type, and this method is equally applicable after modifying
It is T-shaped flange in design cross section.
Exemplary, Practical Project realizes can refer to procedure below:
1. draft known conditions
According to the existing parameter of certain blower fan tower barrel, proposing meter flange position tower outer diameter D t is 3940mm, and tower barrel is thick
Degree s is 22mm, and flange and barrel material are Q345, follows the example of blue yield strength f allowableydFor 304.5MPa, take barrel allowable in the wrong
Take intensity fysFor 313.6MPa, ultimate bending moment M at flange kernel of section is 53000kNm.Four kinds of bolts are selected (to be not limited to this
Four kinds) nominal diameter be designed respectively.Bolt parameter is as follows:
Set up and solve the mathematical programming model of flange structural parameters:
Parameter and the flange known conditions of four kinds of bolts are brought into following equation and set up nonlinear mathematics programming model.Take v
It is 0.99.
Minimize G (a, b, n, t)
Constraints: ZiV-Z (i=A, B, D, E)
(Dt-2·b-s)·π/n≥0
b-s/2-E1≥0
a-1.2·db≥0
N > 0
T > 0
Solving method mathematical programming model, and find out optimal case:
Direct search algorithm (Direct search algorithms) is used to solve above-mentioned nonlinear mathematics programming model,
Obtain four groups of flange parameters and gross weight be as follows:
As can be seen from the above table, the scheme that volume is minimum is the one group of data using M42 bolt.
The flange parameter of optimal case is carried out rounding and verifies
According to actual design needs, optimization design scheme being carried out rounding, the flange parameter after rounding is:
The calculating of the tensile bearing capacity that the parameter after rounding is brought into four kinds of failure modes of the L-type flange theory of plasticity is public
Formula, can obtain:
Now the ultimate tension at flange barrel is:
Ultimate tension is less than all tensile bearing capacity, and check is passed through.
Present invention basic theories based on Mathematical Planning, is reduced to single hop flange even by the mechanical model that annular flange connects
Connect, with the structural parameters of tower drum flange as design variable, the failure mode of four kinds of theories of plasticity, the spanner space of bolt and bolt
Hole back gauge a size of about restraints condition, sets up the mathematical programming model using the cumulative volume of flange and bolt as object function, finally
Optimized algorithm is used to solve the flange connection that the cumulative volume obtaining making flange and bolt is minimum.Application the method obtains quality
The lightest and meet the optimized flange connection of four kinds of failure modes of flange Plastic Design.This method is easily programmed realization,
The amount of calculation of designer can be reduced, improve rapidity and the accuracy of design.
The above, the only detailed description of the invention of the present invention, but protection scope of the present invention is not limited thereto, and any
Those familiar with the art, in the technical scope that the invention discloses, can readily occur in change or replace, should contain
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with described scope of the claims.
Claims (6)
1. an Optimization Design for tower barrel of wind generating set flange, comprises annular flange, described annular in described tower
Flange cross section is L-type, and described annular flange is linked in sequence by multiple single hop flanges and forms, it is characterised in that described method bag
Include following steps:
Step 1, determines ultimate bending moment M that tower outer diameter D t, tower wall thickness s and annular flange kernel of section are subject to, and
Set the diameter d of bolt;
Step 2, by distance a of annular flange inside edge to bolt axis, distance b of bolt axis to barrel center, loop method
Blue thickness t, bolt quantity n, as design variable, build object function G:
Wherein, object function G represents the cumulative volume of single hop flange and bolt, n > 0, t > 0;
Step 3, ultimate bending moment M being subject to according to described tower outer diameter D t, tower wall thickness s, annular flange kernel of section with
And bolt quantity n calculates single hop flange tension;
Step 4, sets and solves described bound for objective function, and described constraints includes: described single hop flange is subject to
Pulling force meets spanner spatial design specification, spiral shell less than the tensile bearing capacity of single hop flange, spanner bulk during assembling bolt
Keyhole back gauge size meets bolt hole back gauge design specification;
Step 5, according to described object function and constraints, sets up mathematical programming model, solves described mathematical programming model,
Obtain the one group design variable minimum so that described object function, and single hop flange corresponding to this group design variable and bolt
Cumulative volume;
Step 6, resets the diameter d of bolt, and is repeated in step 2 to step 5, until obtaining organizing design variable more, with
And organize single hop flange corresponding to design variable and the cumulative volume of bolt more;
Step 7, the one group of design variable choosing the cumulative volume so that single hop flange and bolt minimum in many group design variables is made
Structural parameters for single hop Flange joint.
The Optimization Design of a kind of tower barrel of wind generating set flange the most according to claim 1, it is characterised in that step
Rapid 3 specifically include:
Ultimate bending moment M being subject to according to described tower outer diameter D t, tower wall thickness s and annular flange kernel of section calculates single
Duan Falan tension Z:
Wherein, n is bolt quantity, DsFor tower barrel central diameter, Ds=Dt-s.
The Optimization Design of a kind of tower barrel of wind generating set flange the most according to claim 1, it is characterised in that step
In rapid 4, single hop flange tension specifically includes less than the tensile bearing capacity of single hop flange:
(4a) under failure mode A, the tensile bearing capacity Z of single hop flangeA=FT, Rd, FT, RdTensile bearing capacity for single bolt:
Wherein, K is partial safety factor, ASFor bolt stress area, γMFor material factor, fubFor bolt ultimate tensile;
Failure mode A to be met, single hop flange tension Z is necessarily less than the tension of single hop flange under failure mode A and holds
Load power, i.e. meets ZAV-Z > 0, v are reduction coefficient, v < 1;
(4b) under failure mode B, the tensile bearing capacity of single hop flangeWherein, in failure mode
Bending drag M of barrel under BP1,3b:
Wherein,C is the approximate width of single hop flange model, fysSurrender allowable for tower barrel is strong
Degree, fydYield strength allowable for annular flange;
Failure mode B to be met, single hop flange tension Z is necessarily less than the tension of single hop flange under failure mode B and holds
Load power, i.e. meets ZBV-Z > 0, v are reduction coefficient, v < 1;
(4c) under failure mode D, the tensile bearing capacity of single hop flangeWherein, single hop at bolt hole
The addition bend drag M ' that flanges bend drag and bolt bias produceP1,2:
Bending drag M of barrel under failure mode DP1,3d:
C '=c-dB
bD=b
Wherein, c ' is the approximate width of the single hop flange model after reduction at bolt hole, dBFor the diameter of bolt hole, dSFor packing ring
External diameter, bDDistance for bolt axis to barrel plastic hinge;
Failure mode D to be met, single hop flange tension Z is necessarily less than the tension of single hop flange under failure mode D and holds
Load power, i.e. meets ZDV-Z > 0, v are reduction coefficient, v < 1;
(4d) under failure mode E, the tensile bearing capacity of single hop flangeWherein, under failure mode E
Bending drag M of barrelP1,3e:
MP1,2For single hop flanges bend drag, bEDistance for gasket width center to plastic hinge;
Failure mode E to be met, single hop flange tension Z is necessarily less than the tension of single hop flange under failure mode E and holds
Load power, i.e. meets ZEV-Z > 0, v are reduction coefficient, v < 1.
The Optimization Design of a kind of tower barrel of wind generating set flange the most according to claim 1, it is characterised in that step
In rapid 4, spanner bulk during assembling bolt meets spanner spatial design specification, particularly as follows:
Obtain according to the design specification that JB/ZQ 4005-2006 specifies: circumference minimum between tower annular flange connecting bolt
Distance A2 and minimum spacing E1 of bolt distance barrel, thus obtain following constraints:
(Dt-2·b-s)·π/n≥0
b-s/2-E1≥0
Wherein, Dt represents tower external diameter, and s represents tower wall thickness, and b represents the bolt axis distance to barrel center, and n represents
Bolt quantity, E1 represents the minimum spacing of bolt distance barrel.
The Optimization Design of a kind of tower barrel of wind generating set flange the most according to claim 1, it is characterised in that step
In rapid 4, bolt hole back gauge size meets bolt hole back gauge design specification, particularly as follows:
According to the regulation of EN 1993-1-8, bolt hole center to structure edge distance more than or equal to 1.2 times of bolt aperture, from
And obtain following constraints:
a-1.2·dB≥0
Wherein, a represents the annular flange inside edge distance to bolt axis, dBRepresent the diameter of bolt hole.
The Optimization Design of a kind of tower barrel of wind generating set flange the most according to claim 1, it is characterised in that step
In rapid 5, according to described object function and constraints, set up mathematical programming model as follows:
Object function:
Constraints: ZiV-Z > 0 (i=A, B, D, E)
(Dt-2·b-s)·π/n≥0
b-s/2-E1≥0
a-1.2·dB≥0
N > 0
T > 0
Wherein, Dt represents tower external diameter, and s represents tower wall thickness, and M represents that the limit that annular flange kernel of section is subject to is curved
Square, d represents the diameter of bolt, and a represents the annular flange inside edge distance to bolt axis, and b represents that bolt axis is in barrel
The distance of the heart, t represents annular flange thickness, and n represents bolt quantity, Zi(i=A, B, C, D) represents at failure mode A, B, C or D
The tensile bearing capacity of lower single hop flange, Z represents single hop flange tension, and v is reduction coefficient, and E1 represents bolt distance barrel
Minimum spacing, dBRepresent diameter of bolt hole.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201610650345.0A CN106250646B (en) | 2016-08-09 | 2016-08-09 | Optimal design method for tower flange of wind generating set |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201610650345.0A CN106250646B (en) | 2016-08-09 | 2016-08-09 | Optimal design method for tower flange of wind generating set |
Publications (2)
Publication Number | Publication Date |
---|---|
CN106250646A true CN106250646A (en) | 2016-12-21 |
CN106250646B CN106250646B (en) | 2021-11-30 |
Family
ID=58078018
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201610650345.0A Active CN106250646B (en) | 2016-08-09 | 2016-08-09 | Optimal design method for tower flange of wind generating set |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN106250646B (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109958584A (en) * | 2017-12-26 | 2019-07-02 | 新疆金风科技股份有限公司 | The design method and device of tower barrel of wind generating set flange |
CN109989890A (en) * | 2017-12-29 | 2019-07-09 | 新疆金风科技股份有限公司 | Wind power generating set steel tubular tower design method, apparatus, equipment and medium |
CN110020474A (en) * | 2019-04-02 | 2019-07-16 | 西安交通大学 | A kind of hard and soft contact large deflection disk-shaped structure Bolt load Accurate Prediction method |
CN110159491A (en) * | 2019-06-28 | 2019-08-23 | 三一重能有限公司 | A kind of wind-power generating unit tower semi-automatic design method and device |
CN111310279A (en) * | 2020-01-19 | 2020-06-19 | 中车青岛四方机车车辆股份有限公司 | Method and device for determining train pneumatic parameters |
CN111553109A (en) * | 2020-05-29 | 2020-08-18 | 国网河南省电力公司电力科学研究院 | Stress and finite element analysis method for thin-wall centrifugal concrete steel pipe tower |
CN112231858A (en) * | 2020-10-09 | 2021-01-15 | 北京航天发射技术研究所 | Failure prediction method and device for multi-row bolt connection structure of composite material cylinder |
CN112711819A (en) * | 2020-11-23 | 2021-04-27 | 沪东重机有限公司 | Method for calculating pressure-bearing area of hydraulic tensioner of 340 diesel engine cylinder head bolt |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN202132187U (en) * | 2011-07-14 | 2012-02-01 | 华锐风电科技(集团)股份有限公司 | Guyed tower structure of wind generating set |
US20120230827A1 (en) * | 2008-04-15 | 2012-09-13 | Frontier Pro Services, Llc | Repair of rotor blade roots |
CN103016866A (en) * | 2012-10-29 | 2013-04-03 | 常州大学 | Design method of bolt flange connecting structure of non-homogeneous gasket |
US20130299277A1 (en) * | 2012-05-11 | 2013-11-14 | Clipper Windpower, Inc. | Optimized Wind Turbine Tower with Mountings for Tower Internals |
CN105069223A (en) * | 2015-08-05 | 2015-11-18 | 许继集团有限公司 | Method for checking ultimate strength and fatigue strength of wind turbine tower drum door opening |
CN205064189U (en) * | 2015-10-23 | 2016-03-02 | 内蒙古久和能源装备有限公司 | Firm equipment in wind generating set basis |
-
2016
- 2016-08-09 CN CN201610650345.0A patent/CN106250646B/en active Active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20120230827A1 (en) * | 2008-04-15 | 2012-09-13 | Frontier Pro Services, Llc | Repair of rotor blade roots |
CN202132187U (en) * | 2011-07-14 | 2012-02-01 | 华锐风电科技(集团)股份有限公司 | Guyed tower structure of wind generating set |
US20130299277A1 (en) * | 2012-05-11 | 2013-11-14 | Clipper Windpower, Inc. | Optimized Wind Turbine Tower with Mountings for Tower Internals |
CN103016866A (en) * | 2012-10-29 | 2013-04-03 | 常州大学 | Design method of bolt flange connecting structure of non-homogeneous gasket |
CN105069223A (en) * | 2015-08-05 | 2015-11-18 | 许继集团有限公司 | Method for checking ultimate strength and fatigue strength of wind turbine tower drum door opening |
CN205064189U (en) * | 2015-10-23 | 2016-03-02 | 内蒙古久和能源装备有限公司 | Firm equipment in wind generating set basis |
Non-Patent Citations (4)
Title |
---|
NENAD FRIC: "WIND TOWERS – DESIGN OF FLANGE RING CONNECTION", 《MACEDONIAN ASSOCIATION OF STRUCTURAL ENGINEERS》 * |
PETER SCHAUMANN: "Failure analysis of bolted steel flanges", 《HTTPS://WWW.RESEARCHGATE.NET/PUBLICATION/268201831》 * |
丁帅铭: "风力发电机组管式塔架基础结构分析研究", 《硕士论文-工程科技Ⅱ辑》 * |
胡佳林: "基于有限元方法的风电机组塔筒及法兰优化设计", 《中国农机工业协会风能设备分会《风能产业》(2013年第1期)》 * |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109958584A (en) * | 2017-12-26 | 2019-07-02 | 新疆金风科技股份有限公司 | The design method and device of tower barrel of wind generating set flange |
CN109989890A (en) * | 2017-12-29 | 2019-07-09 | 新疆金风科技股份有限公司 | Wind power generating set steel tubular tower design method, apparatus, equipment and medium |
CN109989890B (en) * | 2017-12-29 | 2020-04-21 | 新疆金风科技股份有限公司 | Method, device, equipment and medium for designing steel cylindrical tower of wind generating set |
CN110020474A (en) * | 2019-04-02 | 2019-07-16 | 西安交通大学 | A kind of hard and soft contact large deflection disk-shaped structure Bolt load Accurate Prediction method |
CN110159491A (en) * | 2019-06-28 | 2019-08-23 | 三一重能有限公司 | A kind of wind-power generating unit tower semi-automatic design method and device |
CN110159491B (en) * | 2019-06-28 | 2020-06-19 | 三一重能有限公司 | Semi-automatic design method and device for wind generating set tower |
CN111310279A (en) * | 2020-01-19 | 2020-06-19 | 中车青岛四方机车车辆股份有限公司 | Method and device for determining train pneumatic parameters |
CN111553109A (en) * | 2020-05-29 | 2020-08-18 | 国网河南省电力公司电力科学研究院 | Stress and finite element analysis method for thin-wall centrifugal concrete steel pipe tower |
CN112231858A (en) * | 2020-10-09 | 2021-01-15 | 北京航天发射技术研究所 | Failure prediction method and device for multi-row bolt connection structure of composite material cylinder |
CN112231858B (en) * | 2020-10-09 | 2024-04-19 | 北京航天发射技术研究所 | Failure prediction method and device for multi-row screw connection structure of composite material cylinder |
CN112711819A (en) * | 2020-11-23 | 2021-04-27 | 沪东重机有限公司 | Method for calculating pressure-bearing area of hydraulic tensioner of 340 diesel engine cylinder head bolt |
Also Published As
Publication number | Publication date |
---|---|
CN106250646B (en) | 2021-11-30 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN106250646A (en) | A kind of Optimization Design of tower barrel of wind generating set flange | |
CN108268685A (en) | L type flange and design method thereof | |
JP6467731B2 (en) | Lashing bar made of composite material and manufacturing method thereof | |
JP6623722B2 (en) | High pressure tank | |
Yadav et al. | Instability of thin steel cylindrical shells under bending | |
CN106202639A (en) | A kind of MJ bolt and nut finite element grid modeling method | |
CN109255142B (en) | Ring-shaped tension overall structure topology optimization method based on niche genetic algorithm | |
WO2015134823A1 (en) | Wind turbine blade spar web having enhanced buckling strength | |
CN110334460A (en) | Roller gear mesh stiffness calculation method | |
CN107895083A (en) | A kind of cable-supported bridge based on the long influence matrix of rope adjusts Suo Fangfa | |
CN109271722A (en) | The design method and equipment of the wall thickness of the pylon of wind power generating set | |
CN106062460A (en) | Improved method to produce high-resistance composite vessels with inner metal liner and vessels made by said method | |
US20190145375A1 (en) | Retrofit winglets for wind turbines | |
CN109190208A (en) | A kind of active rope prestressed stretch-draw amount of tension integral structure determines method | |
CN207107139U (en) | Storage tank | |
Lubis et al. | Ring stability of underground toroidal tanks | |
CN206721593U (en) | It is a kind of express highway roadbed to raise the safeguard structure rebuilded | |
CN211033577U (en) | Woven bag | |
CN112711787B (en) | Structural design method under wind load action of large-height-diameter-ratio self-supporting stainless steel chimney | |
EP2716957B1 (en) | High-pressure vessel made of composite materials | |
CN104326187B (en) | Occlusion tank reinforcing structure and large-sized spiral double-flange occlusion tank applying spiral double-flange occlusion tank reinforcing structure | |
Wang | Analysis of modal transition and coincidence degree variation instabilities of wind turbine planetary gear system | |
Suzuki | D0-D4 system and QCD_ {3+ 1} | |
Oblak et al. | An approach to optimal design of structures with non‐linear response | |
CN220540499U (en) | PP double-high-rib winding composite pipe |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C06 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
GR01 | Patent grant | ||
GR01 | Patent grant | ||
TR01 | Transfer of patent right |
Effective date of registration: 20230919 Address after: 101318 1106, Floor 11, Building 4, Yard 7, Yuxi Road, Shunyi District, Beijing Patentee after: Beijing Quanqi Technology Innovation Co.,Ltd. Address before: 017000 equipment manufacturing base in Dongsheng District, Ordos City, Inner Mongolia Autonomous Region Patentee before: INNER MONGOLIA GEOHO ENERGY EQUIPMENT Co.,Ltd. |
|
TR01 | Transfer of patent right |