CN108241763A - Method and equipment for determining shape of flange chamfer, flange and wind generating set - Google Patents

Method and equipment for determining shape of flange chamfer, flange and wind generating set Download PDF

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Publication number
CN108241763A
CN108241763A CN201611218068.2A CN201611218068A CN108241763A CN 108241763 A CN108241763 A CN 108241763A CN 201611218068 A CN201611218068 A CN 201611218068A CN 108241763 A CN108241763 A CN 108241763A
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CN
China
Prior art keywords
spline curve
shape
indicate
stress
flange
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CN201611218068.2A
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Chinese (zh)
Inventor
刘朝丰
宋小飞
马武福
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Beijing Goldwind Science and Creation Windpower Equipment Co Ltd
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Beijing Goldwind Science and Creation Windpower Equipment Co Ltd
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Application filed by Beijing Goldwind Science and Creation Windpower Equipment Co Ltd filed Critical Beijing Goldwind Science and Creation Windpower Equipment Co Ltd
Priority to CN201611218068.2A priority Critical patent/CN108241763A/en
Publication of CN108241763A publication Critical patent/CN108241763A/en
Pending legal-status Critical Current

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    • 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
    • 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

A method and equipment for determining the shape of a flange chamfer, a flange and a wind generating set are provided. The method comprises the following steps: (A) obtaining a spline curve for controlling the shape of the flange chamfer initially; (B) calculating parameters corresponding to the spline curves and used for indicating the bearing capacity; (C) detecting whether a preset condition is met; (D) when the preset condition is not met, adjusting the shape of the spline curve based on the parameters which are obtained by calculation each time and used for indicating the bearing capacity, and returning to execute the step (B) based on the adjusted spline curve; (E) and when the preset condition is met, determining the shape of the spline curve corresponding to the optimal parameter for indicating the bearing capacity from the parameters for indicating the bearing capacity obtained by each previous calculation as the shape of the flange chamfer. According to the flange chamfering method and the flange chamfering device, the bearing capacity of the flange can be improved by optimally designing the shape of the flange chamfering.

Description

Determine the method and apparatus, flange and wind power generating set of the shape of flange chamfering
Technical field
The present invention relates to wind power generating set fields, more particularly, are related to a kind of side of the shape of determining flange chamfering Method and equipment, the flange and wind power generating set including the flange.
Background technology
Wind power generating set includes pylon, the cabin mounted on tower top, the impeller system mounted on cabin one end.
In general, pylon passes through flanged joint to cabin.The flange needs to support impeller system and the gravity and leaf of cabin The aerodynamic loading that wheel system applies when running.Therefore, the bearing capacity of flange to the normal operation of entire wind power generating set extremely It closes important.Especially with the exploitation of big MW class wind turbine group, more urgently need to improve the bearing capacity of flange.
In addition, pylon is usually formed by multiple sections, generally connected between multiple sections also by flange.Since pylon is branch The load-supporting part of cabin and impeller system is supportted, therefore the flange for being also required to connect multiple sections has higher bearing capacity.
At present, the chamfer shape of above-mentioned flange is circle as shown in Figure 1.However, the stress concentration system at rounded corners Number and fatigue damage are larger, and the static strength and anti-fatigue ability for leading to flange reduce, so as to cause the pylon of wind power generating set Bearing capacity decline.
Invention content
The purpose of the present invention is to provide a kind of shapes of the determining flange chamfering for the bearing capacity that can improve flange Method and apparatus, flange and wind power generating set.
Exemplary embodiment according to the present invention provides a kind of method of the shape of determining flange chamfering, the method packet It includes：(A) spline curve of the shape of initial control flange chamfering is obtained；(B) corresponding be used to indicate of spline curve is calculated to hold The parameter of loading capability, wherein, the corresponding parameter for being used to indicate bearing capacity of spline curve is flange chamfering in batten song The parameter for being used to indicate bearing capacity under the shape of line；(C) it detects whether to meet preset condition；(D) when being unsatisfactory for default item During part, the shape of spline curve is adjusted based on the parameter for being used to indicate bearing capacity being calculated every time before, based on tune Spline curve after whole, which returns, performs step (B)；(E) it when meeting preset condition, is used to refer to by what is be calculated every time before Show that the optimal shape for being used to indicate the spline curve corresponding to the parameter of bearing capacity among the parameter of bearing capacity determines Shape for flange chamfering.
Optionally, the shape of spline curve is adjusted based on the parameter for being used to indicate bearing capacity being calculated every time before The step of shape, includes：Based on the shape of adjustment spline curve causes the parameter for being used to indicate bearing capacity to change every time before Situation, adjust the shape of spline curve.
Optionally, the parameter for being used to indicate bearing capacity includes the factor of stress concentration and/or fatigue damage value.
Optionally, the shape of spline curve is adjusted by changing the position at the control point in spline curve, wherein, batten The control point of predetermined quantity is provided on curve, each control point only changes in corresponding preset range every time.
Optionally, in the shape for adjusting spline curve, starting control point and the termination in spline curve are not adjusted always Control point, wherein, starting dominating pair of vertices answers the starting point of flange chamfering, terminates the terminating point that dominating pair of vertices answers flange chamfering.
Optionally, initial spline curve is to control the spline curve of circular flange chamfering or the oval flange chamfering of control Spline curve.
Optionally, the preset condition is to have carried out the adjustment of pre-determined number to the shape of spline curve.
Optionally, the corresponding factor of stress concentration SCF of spline curve is calculated by following formula：
SCF=σ/σN
Wherein, σ and σNIndicate respectively the maximum of stress hotspot location of the flange chamfering under the shape of the spline curve The actual stress and nominal stress of tensile stress.
Optionally, the corresponding fatigue damage value D of spline curvemaxIt is calculated by following formula：
Wherein, NiIndicate the stress-number of cycles in i-th of stress section in Markov matrix；ΔσiIndicate Markov The stress range in i-th of stress section in matrix, the stress heat based on flange chamfering under the shape of the spline curve Point position stress is calculated with external applied load change curve；ΔσDIndicate the corresponding fatigue strength of material SN knee of curves；NDInstruction The corresponding stress-number of cycles of material SN knee of curves；γMFor material partial safety factor；nFIndex stress interval number；M indicates material The inverse of the SN slopes of curve, SCF indicate the corresponding factor of stress concentration of the spline curve.
In accordance with an alternative illustrative embodiment of the present invention, a kind of flange is provided, the chamfering of the flange passes through as described above Method determine.
In accordance with an alternative illustrative embodiment of the present invention, a kind of wind power generating set, the wind power generating set packet are provided Pylon and cabin are included, the pylon and cabin are connected by flange as described above.
Optionally, the pylon includes multiple portions, by as above between at least two parts in the multiple part The flange connects.
In accordance with an alternative illustrative embodiment of the present invention, a kind of equipment of the shape of determining flange chamfering is provided, it is described to set It is standby to include：Initial spline curve acquiring unit obtains the spline curve of the shape of initial control flange chamfering；Computing unit, The corresponding parameter for being used to indicate bearing capacity of spline curve is calculated, wherein, spline curve is corresponding to be used to indicate bearing capacity Parameter be the parameter that is used to indicate bearing capacity of the flange chamfering under the shape of the spline curve；Detection unit, detection Whether preset condition is met；Adjustment unit when being unsatisfactory for preset condition, is held based on being used to indicate of being calculated every time before The parameter of loading capability adjusts the shape of spline curve, returns to being used to indicate for spline curve that computing unit is calculated after adjustment and holds The parameter of loading capability；When meeting preset condition, carrying energy is used to indicate by what is be calculated every time before for shape determining unit The optimal shape for being used to indicate the spline curve corresponding to the parameter of bearing capacity among the parameter of power is determined as flange and falls The shape at angle.
Optionally, adjustment unit causes to be used to indicate the ginseng of bearing capacity based on the shape for adjusting spline curve every time before The changed situation of number adjusts the shape of spline curve.
Optionally, the parameter for being used to indicate bearing capacity includes the factor of stress concentration and/or fatigue damage value.
Optionally, adjustment unit adjusts the shape of spline curve by changing the position at the control point in spline curve, Wherein, the control point of predetermined quantity is provided in spline curve, each control point only changes in corresponding preset range every time.
Optionally, adjustment unit does not adjust the starting control in spline curve always in the shape for adjusting spline curve Point and termination control point, wherein, starting dominating pair of vertices answers the starting point of flange chamfering, terminates the end that dominating pair of vertices answers flange chamfering Stop.
Optionally, initial spline curve is to control the spline curve of circular flange chamfering or the oval flange chamfering of control Spline curve.
Optionally, the preset condition is to have carried out the adjustment of pre-determined number to the shape of spline curve.
Optionally, the corresponding factor of stress concentration SCF of spline curve is calculated by following formula：
SCF=σ/σN
Wherein, σ and σNIndicate respectively the maximum of stress hotspot location of the flange chamfering under the shape of the spline curve The actual stress and nominal stress of tensile stress.
Optionally, the corresponding fatigue damage value D of spline curvemaxIt is calculated by following formula：
Wherein, NiIndicate the stress-number of cycles in i-th of stress section in Markov matrix；ΔσiIndicate Markov The stress range in i-th of stress section in matrix, the stress heat based on flange chamfering under the shape of the spline curve Point position stress is calculated with external applied load change curve；ΔσDIndicate the corresponding fatigue strength of material SN knee of curves；NDInstruction The corresponding stress-number of cycles of material SN knee of curves；γMFor material partial safety factor；nFIndex stress interval number；M indicates material The inverse of the SN slopes of curve, SCF indicate the corresponding factor of stress concentration of the spline curve.
It is optimized by the shape to flange chamfering, the bearing capacity of flange can be improved, improve the pole of flange Limit bearing capacity and anti-fatigue ability.
Description of the drawings
Fig. 1 shows the section of existing circular flange chamfering；
Fig. 2 shows the flow charts of the method for the shape of determining flange chamfering according to an exemplary embodiment of the present invention；
Fig. 3 shows the diagram of spline curve according to an exemplary embodiment of the present invention；
Fig. 4 shows the sectional view of the flange chamfering determined according to an exemplary embodiment of the present；
Fig. 5 shows the shape of the flange chamfering of the prior art and flange chamfering determining according to an exemplary embodiment of the present Shape comparison diagram；
Fig. 6 shows the curve that the stress hotspot location stress of flange chamfering changes with external applied load；
Fig. 7 shows the block diagram of the equipment of the shape of determining flange chamfering according to an exemplary embodiment of the present invention.
Specific embodiment
The embodiment of the present invention is reference will now be made in detail, the example of the embodiment is shown in the drawings, wherein, identical mark Number identical component is referred to always.It will illustrate the embodiment by referring to accompanying drawing below, to explain the present invention.
Fig. 2 shows the flow charts of the method for the shape of determining flange chamfering according to an exemplary embodiment of the present invention.
As shown in Fig. 2, in step S10, the spline curve of the shape of initial control flange chamfering is obtained.
That is, describe the appearance profile of flange chamfering by spline curve.
As an example, flange can be the flange for connecting pylon and cabin, the flange of multiple portions for connecting pylon etc..
As an example, it may be provided with the control point of predetermined quantity in spline curve.It can be set according to actual conditions predetermined Quantity.For example, it is contemplated that the size to chamfering position is smaller, if predetermined quantity is set as the distance between 9,9 control points Very little can more accurately provide the appearance profile at chamfering by the path that 9 control points are sequentially connected to composition, because This, can set 9 control points in spline curve.
As an example, the starting control point of spline curve can companion flange chamfering starting point, terminate control point can correspond to The terminating point of flange chamfering.
It should be understood that those skilled in the art can determine starting, terminate control point according to existing any method.This Invention is not intended to be limited in any this.Starting point and any two points that terminating point can be in spline curve, and then by adjusting sample Initial flange chamfering, can be shaped to various suitable shapes, also may be used by any number of control point on curve By setting the initial position at the control point in spline curve, the shape of initial flange chamfering is set.
As an example, initial flange chamfering can be round or ellipse, that is, initial spline curve is the round method of control The spline curve of the spline curve of blue chamfering or the oval flange chamfering of control, the initial position at the control point in spline curve can (for example, initial spline curve is the circular arc or ellipse of a quarter on rounded corners path or oval chamfering path Arc).By initial flange chamfering being provided in round or ellipse can effectively reduce follow-up calculation amount.
In step S20, the corresponding parameter for being used to indicate bearing capacity of spline curve is calculated, wherein, spline curve corresponds to The parameter for being used to indicate bearing capacity be that flange chamfering is used to indicate bearing capacity under the shape of the spline curve Parameter.
As an example, the parameter for being used to indicate bearing capacity may include at least one parameter that can indicate bearing capacity. For example, the parameter for being used to indicate bearing capacity may include the factor of stress concentration and/or fatigue damage value.
As an example, the corresponding factor of stress concentration SCF of spline curve can be calculated by formula (1)：
SCF=σ/σN (1)
Wherein, σ and σNIndicate respectively the maximum of stress hotspot location of the flange chamfering under the shape of the spline curve The actual stress and nominal stress of tensile stress.
As an example, the corresponding fatigue damage value D of spline curvemaxIt can be calculated by formula (2)：
Wherein, NiIndicate the stress-number of cycles in i-th of stress section in Markov matrix；ΔσiIndicate Markov The stress range in i-th of stress section in matrix, the stress heat based on flange chamfering under the shape of the spline curve Point position stress is calculated with external applied load change curve；ΔσDIndicate the corresponding fatigue strength of material SN knee of curves；NDInstruction The corresponding stress-number of cycles of material SN knee of curves；γMFor material partial safety factor；nFIndex stress interval number；M indicates material The inverse of the SN slopes of curve, SCF indicate the corresponding factor of stress concentration of the spline curve.
It should be understood that material SN curves are the material SN curves of flange.
As an example, it can be damaged using finite element model to calculate the corresponding factor of stress concentration SCF of spline curve and fatigue Wound value Dmax.For example, APDL language can be run under ANSYS environment obtains stress of the flange chamfering under the shape of spline curve The actual stress σ of the maximum tension stress of hotspot location, stress hotspot location stress are with external applied load change curve, fatigue damage value Dmax。
As an example, it can be used the name of the maximum tension stress of the stress hotspot location of mechanics of materials calculating flange chamfering should Power.
As an example, the fatigue load Markov matrix about flange chamfering can be obtained by Bladed LOAD FOR softwares It arrives.
As an example, can by stress hotspot location stress of the flange chamfering under the shape of spline curve with external applied load Change curve carries out interpolation calculation and obtains Δ σi。
In step S30, detect whether to meet preset condition.
As an example, the preset condition can carry out the adjustment of pre-determined number to the shape of spline curve.Example Such as, pre-determined number can be set as 150 times.
In addition, as an example, the preset condition, which can also be spline curve after adjustment, corresponding is used to indicate carrying The parameter of ability meets preset value.For example, when the parameter for being used to indicate bearing capacity includes the factor of stress concentration and/or fatigue damage During wound value, the preset condition can be that the factor of stress concentration is less than the first predetermined threshold value and/or fatigue damage value is less than second Predetermined threshold value.
When step S30 determines to be unsatisfactory for preset condition, step S40 is performed, based on the use being calculated every time before The shape of spline curve is adjusted in the parameter of instruction bearing capacity, is returned based on the spline curve after adjustment and performs step S20.
It as an example, can be based on the shape of adjustment spline curve causes corresponding be used to indicate of spline curve to hold every time before The changed situation of parameter of loading capability adjusts the shape of spline curve.
As an example, the shape of spline curve can be adjusted by changing the position at the control point in spline curve.
Particularly, after the shape for adjusting spline curve before can counting and learning every time, spline curve pair before and after adjustment The situation of change for the parameter of bearing capacity that answers be used to indicate (for example, in the once shape of adjustment spline curve, only varies by Third control point is moved distance a along X-axis positive direction, spline curve is caused to correspond to by the third control point of spline curve The factor of stress concentration increase b, fatigue damage value increases c) and changing rule, so that it is determined that how to adjust batten next time The shape of curve can so that the parameter for being used to indicate bearing capacity is more excellent.
As an example, each control point can only change in corresponding preset range every time.For example, each control point is each Can only be changed in square boxes of the length of side put centered on current location for k, that is, each each abscissa in control point and The variation range of ordinate is [0, k/2], and k can be the value for being more than 0 set according to actual conditions.
As shown in figure 3, being provided with 9 control points in spline curve, dotted line is initial spline curve, 9 control points Initial coordinate is followed successively byI represents the serial number at control point,WithIt is respectively It originates control point and terminates control point, each control point every time only can be in pros of the length of side put centered on current location for k It is changed in shape box.The coordinate at 9 control points after adjustment isJ is the integer more than 0, is represented The number that spline curve is adjusted.
As an example, in order to reduce the iterations during adjustment, once it is determined when originating and terminating control point Afterwards, it can not adjust the starting control point in spline curve always at the shape for adjusting spline curve and terminate control point.
When step S30 determines to meet preset condition, performing step S50, it is used to refer to by what is be calculated every time before Show that the optimal shape for being used to indicate the spline curve corresponding to the parameter of bearing capacity among the parameter of bearing capacity determines Shape for flange chamfering.
In other words, a spline curve is determined in the spline curve after adjusting every time before, which corresponds to most The excellent parameter for being used to indicate bearing capacity.
If as an example, when being used to indicate the parameter of bearing capacity and only including a parameter, when the parameter is optimal For the optimal parameter for being used to indicate bearing capacity；It, should if the parameter for being used to indicate bearing capacity includes multiple parameters The as optimal parameter for being used to indicate bearing capacity during multiple parameters total optimization.
For example, if the parameter for being used to indicate bearing capacity is the factor of stress concentration, optimal is used to indicate carrying energy Minimum stress coefficient of concentration among the factor of stress concentration that the parameter of power is calculated every time before being.It is held if be used to indicate The parameter of loading capability is fatigue damage value, then the optimal parameter for being used to indicate bearing capacity is calculated tired every time before being Minimum fatigue damage value among labor impairment value.
If for example, be used to indicate bearing capacity parameter include the factor of stress concentration and fatigue damage value, it is optimal It is a certain among the factor of stress concentration and fatigue damage value that the parameter for being used to indicate bearing capacity is calculated every time before being The secondary factor of stress concentration being calculated and fatigue damage value, and the factor of stress concentration that is calculated of this time and fatigue damage value Total optimization.
The optimal shape for being used to indicate the spline curve corresponding to the parameter of bearing capacity is the optimal of flange chamfering Shape.
Fig. 4 shows that flange determined by the method for the shape of determining flange chamfering according to an exemplary embodiment of the present invention falls The sectional view at angle.
Fig. 5 shows the shape of the flange chamfering of the prior art and flange chamfering determining according to an exemplary embodiment of the present Shape comparison diagram, wherein, dotted line instruction the prior art flange chamfering shape, solid line indicate according to example of the present invention The shape of flange chamfering that property embodiment determines.
Fig. 6 shows the curve that the stress hotspot location stress of flange chamfering changes with external applied load.With reference to Fig. 6, solid line instruction The curve that the hotspot location stress of flange chamfering before optimization changes with external applied load, dotted line instruction is according to the exemplary implementation of the present invention The curve that the hotspot location stress of flange chamfering after example optimization changes with external applied load.
Table 1 be shown respectively optimization before flange chamfering shape and according to an exemplary embodiment of the present optimization after flange SCF and D corresponding to the shape of chamferingmax, it can be seen that SCF and D corresponding to the shape of the flange chamfering after optimizationmaxIt is bright It is aobvious to reduce.
Table 1
Fig. 7 shows the block diagram of the equipment of the shape of determining flange chamfering according to an exemplary embodiment of the present invention.
As shown in fig. 7, the equipment of the shape of determining flange chamfering according to an exemplary embodiment of the present invention includes：Initial sample Curve acquisition unit 10, computing unit 20, detection unit 30, adjustment unit 40 and shape determining unit 50.
Initial spline curve acquiring unit 10 is used to obtain the spline curve of the shape of initial control flange chamfering.
As an example, it may be provided with the control point of predetermined quantity in spline curve.It can be set according to actual conditions predetermined Quantity.For example, it is contemplated that the size to chamfering position is smaller, if predetermined quantity is set as the distance between 9,9 control points Very little can more accurately provide the appearance profile at chamfering by the path that 9 control points are sequentially connected to composition, because This, can set 9 control points in spline curve.
As an example, the starting control point of spline curve can companion flange chamfering starting point, terminate control point can correspond to The terminating point of flange chamfering.
It should be understood that those skilled in the art can determine starting, terminate control point according to existing any method.This Invention is not intended to be limited in any this.Starting point and any two points that terminating point can be in spline curve, and then by adjusting sample Initial flange chamfering, can be shaped to various suitable shapes, also may be used by any number of control point on curve By setting the initial position at the control point in spline curve, the shape of initial flange chamfering is set.
As an example, initial flange chamfering can be round or ellipse, that is, initial spline curve is the round method of control The spline curve of the spline curve of blue chamfering or the oval flange chamfering of control, the initial position at the control point in spline curve can (for example, initial spline curve is the circular arc or ellipse of a quarter on rounded corners path or oval chamfering path Arc).By initial flange chamfering being provided in round or ellipse can effectively reduce follow-up calculation amount.
Computing unit 20 is used to calculate the corresponding parameter for being used to indicate bearing capacity of spline curve, wherein, spline curve The corresponding parameter for being used to indicate bearing capacity is that flange chamfering is used to indicate carrying energy under the shape of the spline curve The parameter of power.
As an example, the parameter for being used to indicate bearing capacity may include at least one parameter that can indicate bearing capacity. For example, the parameter for being used to indicate bearing capacity may include the factor of stress concentration and/or fatigue damage value.
As an example, the corresponding factor of stress concentration SCF of spline curve can be calculated by formula (1).
As an example, the corresponding fatigue damage value D of spline curvemaxIt can be calculated by formula (2)
As an example, computing unit 20 can calculate the corresponding factor of stress concentration of spline curve using finite element model SCF and fatigue damage value Dmax。
Detection unit 30 is for detecting whether meet preset condition.
As an example, the preset condition can carry out the adjustment of pre-determined number to the shape of spline curve.Example Such as, pre-determined number can be set as 150 times.
In addition, as an example, the preset condition, which can also be spline curve after adjustment, corresponding is used to indicate carrying The parameter of ability meets preset value.For example, when the parameter for being used to indicate bearing capacity includes the factor of stress concentration and/or fatigue damage During wound value, the preset condition can be that the factor of stress concentration is less than the first predetermined threshold value and/or fatigue damage value is less than second Predetermined threshold value.
Adjustment unit 40 is used for when detection unit 30 determines to be unsatisfactory for preset condition, based on what is be calculated every time before The parameter of bearing capacity is used to indicate to adjust the shape of spline curve, computing unit 20 is returned and calculates the spline curve after adjustment The corresponding parameter for being used to indicate bearing capacity.
As an example, adjustment unit 40 can be based on the shape of adjustment spline curve so that spline curve is corresponding every time before The changed situation of parameter of bearing capacity is used to indicate, adjusts the shape of spline curve.
As an example, adjustment unit 40 can adjust spline curve by changing the position at the control point in spline curve Shape.
Particularly, after the shape for adjusting spline curve before adjustment unit 40 can be counted and be learnt every time, before and after adjustment The situation of change of the corresponding parameter for being used to indicate bearing capacity of spline curve is (for example, in the shape of once adjustment spline curve When, the third control point of spline curve is only varied by, third control point is moved into distance a along X-axis positive direction, leads to sample The corresponding factor of stress concentration of curve increases b, fatigue damage value increases c) and changing rule, so that it is determined that next time such as What adjusts the shape of spline curve, can so that the parameter for being used to indicate bearing capacity is more excellent.
As an example, each control point can only change in corresponding preset range every time.For example, each control point is each Can only be changed in square boxes of the length of side put centered on current location for k, that is, each each abscissa in control point and The variation range of ordinate is [0, k/2], and k can be the value for being more than 0 set according to actual conditions.
As an example, in order to reduce the iterations during adjustment, once it is determined when originating and terminating control point Afterwards, adjustment unit 40 can not adjust starting control point and the termination in spline curve always in the shape for adjusting spline curve Control point.
Shape determining unit 50 is used for when detection unit 30 determines to meet preset condition, by what is be calculated every time before The optimal shape for being used to indicate the spline curve corresponding to the parameter of bearing capacity being used to indicate among the parameter of bearing capacity Shape is determined as the shape of flange chamfering.
In other words, a spline curve is determined in spline curve of the shape determining unit 50 after adjusting every time before, it should Spline curve corresponds to the optimal parameter for being used to indicate bearing capacity.
If as an example, when being used to indicate the parameter of bearing capacity and only including a parameter, when the parameter is optimal For the optimal parameter for being used to indicate bearing capacity；It, should if the parameter for being used to indicate bearing capacity includes multiple parameters The as optimal parameter for being used to indicate bearing capacity during multiple parameters total optimization.
For example, if the parameter for being used to indicate bearing capacity is the factor of stress concentration, optimal is used to indicate carrying energy Minimum stress coefficient of concentration among the factor of stress concentration that the parameter of power is calculated every time before being.It is held if be used to indicate The parameter of loading capability is fatigue damage value, then the optimal parameter for being used to indicate bearing capacity is calculated tired every time before being Minimum fatigue damage value among labor impairment value.
If for example, be used to indicate bearing capacity parameter include the factor of stress concentration and fatigue damage value, it is optimal It is a certain among the factor of stress concentration and fatigue damage value that the parameter for being used to indicate bearing capacity is calculated every time before being The secondary factor of stress concentration being calculated and fatigue damage value, and the factor of stress concentration that is calculated of this time and fatigue damage value Total optimization.
The optimal shape for being used to indicate the spline curve corresponding to the parameter of bearing capacity is the optimal of flange chamfering Shape.
The foregoing describe the methods and apparatus of the shape of the determining flange chamfering of exemplary embodiment according to the present invention.
In addition, the another exemplary embodiment of the present invention additionally provides a kind of wind power generating set, the wind power generating set Including flange, which has the chamfer shape determined by the above method and equipment.
In particular, the wind power generating set may include pylon and the cabin mounted on tower top.According to the present embodiment, Pylon and cabin can be connected to each other by the flange with above-mentioned chamfer shape.In addition, pylon may include multiple portions, it is multiple It can be also connected to each other between at least two parts in part by the flange with above-mentioned chamfer shape.
Method and apparatus, flange and the wind-power electricity generation of the shape of determining flange chamfering according to an exemplary embodiment of the present invention Unit can obtain the best design of flange chamfering shape, and chamfering fatigue damage reduces by 80% compared with rounded corners after optimization Left and right, the factor of stress concentration reduce by 40% or so, and the static strength and anti-fatigue performance of flange significantly improve, but flange overall weight Change with processing technology smaller.Therefore there is more superior mechanical property and more economical knot by the flange that this method determines Structure.
It is moreover, it should be understood that each in the equipment of the shape of determining flange chamfering according to an exemplary embodiment of the present invention A unit can be implemented as hardware component and/or component software.Those skilled in the art are according to performed by each unit of restriction Processing, can such as use site programmable gate array (FPGA) or application-specific integrated circuit (ASIC) realize each unit.
In addition, the method for the shape of determining flange chamfering according to an exemplary embodiment of the present invention may be implemented as calculating Computer code in machine readable medium recording program performing.Described in those skilled in the art can realize according to the description to the above method Computer code.The above method of the invention is realized when the computer code is performed in a computer.
Although exemplary embodiment of the present invention is described in detail above, have in the technical field of the invention Common knowledge person without departing from the spirit and scope of the present invention, can make the embodiment of the present invention various modification and change Type.It is understood that in the opinion of those skilled in the art, these modifications and variations will fall into the sheet that claim is limited In the spirit and scope of invention.

Claims (21)

  1. A kind of 1. method of the shape of determining flange chamfering, which is characterized in that the method includes：
    (A) spline curve of the shape of initial control flange chamfering is obtained；
    (B) the corresponding parameter for being used to indicate bearing capacity of spline curve is calculated, wherein, corresponding be used to indicate of spline curve is held The parameter of loading capability is the parameter that is used to indicate bearing capacity of the flange chamfering under the shape of the spline curve；
    (C) it detects whether to meet preset condition；
    (D) it when being unsatisfactory for preset condition, is adjusted based on the parameter for being used to indicate bearing capacity being calculated every time before The shape of spline curve is returned based on the spline curve after adjustment and performs step (B)；
    (E) it is when meeting preset condition, being used to indicate of being calculated every time before is optimal among the parameter of bearing capacity The shape for being used to indicate the spline curve corresponding to the parameter of bearing capacity be determined as the shape of flange chamfering.
  2. 2. the method as described in claim 1, which is characterized in that be used to indicate bearing capacity based on what is be calculated every time before Parameter include the step of the shape of spline curve to adjust：
    The changed situation of the parameter for being used to indicate bearing capacity is caused based on the shape for adjusting spline curve every time before, is adjusted The shape of whole spline curve.
  3. 3. method as claimed in claim 1 or 2, which is characterized in that the parameter for being used to indicate bearing capacity includes stress concentration Coefficient and/or fatigue damage value.
  4. 4. method as claimed in claim 1 or 2, which is characterized in that by change the position at the control point in spline curve come The shape of spline curve is adjusted, wherein, the control point of predetermined quantity is provided in spline curve, each control point is every time only in phase It is changed in the preset range answered.
  5. 5. method as claimed in claim 4, which is characterized in that in the shape for adjusting spline curve, do not adjust batten always Starting control point and termination control point on curve, wherein, starting dominating pair of vertices answers the starting point of flange chamfering, terminates control point The terminating point of companion flange chamfering.
  6. 6. the method as described in claim 1, which is characterized in that initial spline curve is to control the batten of circular flange chamfering The spline curve of curve or the oval flange chamfering of control.
  7. 7. the method as described in claim 1, which is characterized in that the preset condition is to have been carried out to the shape of spline curve The adjustment of pre-determined number.
  8. 8. method as claimed in claim 3, which is characterized in that the corresponding factor of stress concentration SCF of spline curve passes through following formula It is calculated：
    SCF=σ/σN
    Wherein, σ and σNIndicate respectively the maximum tension stress of stress hotspot location of the flange chamfering under the shape of the spline curve Actual stress and nominal stress.
  9. 9. the method as described in claim 3 or 8, which is characterized in that the corresponding fatigue damage value D of spline curvemaxPass through following formula It is calculated：
    Wherein, NiIndicate the stress-number of cycles in i-th of stress section in Markov matrix；ΔσiIndicate Markov matrix In i-th of stress section stress range, the stress hot spot position based on flange chamfering under the shape of the spline curve Stress is put to be calculated with external applied load change curve；ΔσDIndicate the corresponding fatigue strength of material SN knee of curves；NDIndicate material The corresponding stress-number of cycles of SN knee of curves；γMFor material partial safety factor；nFIndex stress interval number；M instruction materials SN is bent The inverse of line slope, SCF indicate the corresponding factor of stress concentration of the spline curve.
  10. 10. a kind of flange, which is characterized in that the chamfering of the flange passes through method as claimed in any one of claims 1-9 wherein To determine.
  11. 11. a kind of wind power generating set, the wind power generating set includes pylon and cabin, which is characterized in that the pylon and Cabin is connected by flange as claimed in claim 10.
  12. 12. wind power generating set according to claim 11, the pylon includes multiple portions, which is characterized in that described It is connected between at least two parts in multiple portions by flange as claimed in claim 10.
  13. 13. a kind of equipment of the shape of determining flange chamfering, which is characterized in that the equipment includes：
    Initial spline curve acquiring unit obtains the spline curve of the shape of initial control flange chamfering；
    Computing unit calculates the corresponding parameter for being used to indicate bearing capacity of spline curve, wherein, spline curve is corresponding to be used for The parameter for indicating bearing capacity is the parameter that is used to indicate bearing capacity of the flange chamfering under the shape of the spline curve；
    Detection unit detects whether to meet preset condition；
    Adjustment unit, when being unsatisfactory for preset condition, based on the parameter for being used to indicate bearing capacity being calculated every time before To adjust the shape of spline curve, the ginseng for being used to indicate bearing capacity of the spline curve after return computing unit calculating adjustment Number；
    Shape determining unit, when meeting preset condition, the parameter for being used to indicate bearing capacity that will be calculated every time before Among the optimal shape for being used to indicate the spline curve corresponding to the parameter of bearing capacity be determined as the shape of flange chamfering.
  14. 14. equipment as claimed in claim 13, which is characterized in that adjustment unit is based on the shape for adjusting spline curve every time before Shape causes the changed situation of the parameter for being used to indicate bearing capacity, adjusts the shape of spline curve.
  15. 15. the equipment as described in claim 13 or 14, which is characterized in that the parameter for being used to indicate bearing capacity includes stress collection Middle coefficient and/or fatigue damage value.
  16. 16. the equipment as described in claim 13 or 14, which is characterized in that adjustment unit is by changing the control in spline curve The position of point adjusts the shape of spline curve, wherein, the control point of predetermined quantity, each control point are provided in spline curve It is only changed in corresponding preset range every time.
  17. 17. equipment as claimed in claim 16, which is characterized in that adjustment unit is in the shape for adjusting spline curve, always The starting control point in spline curve is not adjusted and terminates control point, wherein, starting dominating pair of vertices answers the starting point of flange chamfering, Terminate the terminating point that dominating pair of vertices answers flange chamfering.
  18. 18. equipment as claimed in claim 13, which is characterized in that initial spline curve is to control the sample of circular flange chamfering The spline curve of curve or the oval flange chamfering of control.
  19. 19. equipment as claimed in claim 13, which is characterized in that the preset condition is to have been carried out to the shape of spline curve The adjustment of pre-determined number.
  20. 20. equipment as claimed in claim 15, which is characterized in that the corresponding factor of stress concentration SCF of spline curve is under Formula is calculated：
    SCF=σ/σN
    Wherein, σ and σNIndicate respectively the maximum tension stress of stress hotspot location of the flange chamfering under the shape of the spline curve Actual stress and nominal stress.
  21. 21. the equipment as described in claim 15 or 20, which is characterized in that the corresponding fatigue damage value D of spline curvemaxPass through Following formula is calculated：
    Wherein, NiIndicate the stress-number of cycles in i-th of stress section in Markov matrix；ΔσiIndicate Markov matrix In i-th of stress section stress range, the stress hot spot position based on flange chamfering under the shape of the spline curve Stress is put to be calculated with external applied load change curve；ΔσDIndicate the corresponding fatigue strength of material SN knee of curves；NDIndicate material The corresponding stress-number of cycles of SN knee of curves；γMFor material partial safety factor；nFIndex stress interval number；M instruction materials SN is bent The inverse of line slope, SCF indicate the corresponding factor of stress concentration of the spline curve.
CN201611218068.2A 2016-12-26 2016-12-26 Method and equipment for determining shape of flange chamfer, flange and wind generating set Pending CN108241763A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201611218068.2A CN108241763A (en) 2016-12-26 2016-12-26 Method and equipment for determining shape of flange chamfer, flange and wind generating set

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201611218068.2A CN108241763A (en) 2016-12-26 2016-12-26 Method and equipment for determining shape of flange chamfer, flange and wind generating set

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Application publication date: 20180703