CN106055833A - Flexible simulation based design method for tongs connecting assembly of aerostat - Google Patents
Flexible simulation based design method for tongs connecting assembly of aerostat Download PDFInfo
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- CN106055833A CN106055833A CN201610466825.1A CN201610466825A CN106055833A CN 106055833 A CN106055833 A CN 106055833A CN 201610466825 A CN201610466825 A CN 201610466825A CN 106055833 A CN106055833 A CN 106055833A
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- handgrip
- cloth
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- utricule
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/30—Circuit design
- G06F30/36—Circuit design at the analogue level
- G06F30/367—Design verification, e.g. using simulation, simulation program with integrated circuit emphasis [SPICE], direct methods or relaxation methods
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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
Abstract
The invention provides a flexible simulation based design method for a tongs connecting assembly of an aerostat. The method comprises the steps of: establishing a structure model of the tongs connecting assembly according to a structural style and a connecting process of the tongs connecting assembly of the aerostat; obtaining a deformation mechanism and a failure mode of the structure model of the tongs connecting assembly in a working state by using a flexible modeling and analysis technology; establishing an influence law model of structure and non-structural design parameters for the performance of the tongs connecting assembly; setting a parameter range of each part of the tongs connecting assembly according to the structure model of the tongs connecting assembly, the deformation mechanism and the failure mode of the structure model of the tongs connecting assembly in the working state, and the influence law model of the structure and non-structural design parameters for the performance of the tongs connecting assembly so as to design the tongs connecting assembly of the aerostat. According to the design method, the design quality of tongs of the aerostat can be improved and the design cost of the tongs of the aerostat can be reduced.
Description
Technical field
The present invention relates to aerostatics design field, connect based on flexible simulated aerostatics handgrip particularly to a kind of
The method for designing of assembly.
Background technology
Aerostatics generally refers to aircraft that proportion is lighter than air, that rely on atmospheric buoyancy force lift-off.Handgrip connects assembly
One of significant design position of the aerostatics such as captive balloon, dirigible, connects the power transmission of assembly, it is possible to achieve to floating by handgrip
Fixing and the manipulation of device miscellaneous part, is effectively improved structural stability and opposing external applied load ability.The advanced aerostatics of a new generation is wanted
Asking when long boat, will have good stability and safety under multitask environment, as crucial power transmission position, handgrip connects
Assembly must possess moderately good serviceability under complicated adverse circumstances, and this design level that handgrip connects assembly proposes
Significant challenge.
Aerostatics handgrip connects assembly by gripping structure itself and the minor structure such as coupled utricule cloth and packing cloth
Constitute, it may happen that structural failure or destruction under complicated external applied load and corrosive environment.Existing aerostatics product is being disliked
There is handgrip connecting portion tear failure event under bad weather environment, cause bigger economic loss and personal safety to threaten.Composition
Handgrip connects the minor structure of assembly and is mostly fexible film structure, and the mode of texturing under different loads effect has multiformity,
Handgrip is made to connect the failure mechanism complexity of assembly.
At present, the fine design of Simulation connecting assembly for handgrip is the most visible, and this is relatively costly due to design.Work
Generally it is reduced in journey connect unit, and the design & check of its minor structure is mainly passed through test method.Since it is designed that
This restriction, limited test data is difficult to be formed regular design guidance, is also difficult to determine that handgrip connects by test in addition
The clear deformation process of assembly and failure mechanism.
Summary of the invention
The purpose of the present invention is intended at least solve one of described technological deficiency.
To this end, it is an object of the invention to propose a kind of design side connecting assembly based on flexible simulated aerostatics handgrip
Method, can solve the problems such as the design of existing aerostatics handgrip lacks effective simulation means, and design cost is high, thus improve floating
Device handgrip designing quality, reduction design cost.
To achieve these goals, embodiments of the invention provide a kind of based on flexible simulated aerostatics handgrip connection group
The method for designing of part, comprises the steps:
Step S1, connects version and the Joining Technology of assembly, sets up described handgrip connection group according to aerostatics handgrip
The structural model of part, wherein, described handgrip connects the structural model of assembly and includes: gripping structure is connected with described gripping structure
Utricule cloth and packing cloth, described gripping structure includes: bracing cable, joint, handgrip cloth and embed in described handgrip cloth and strengthen
Bar；
Step S2, uses flexible loading and analytical technology, it is thus achieved that described handgrip connects the structural model of assembly at work shape
Deformation mechanism under state and failure mode；
Step S3, sets up structure and non-structural design parameter and described handgrip is connected the affecting laws model of assembly property；
Step S4, connects the structural model of assembly in work according to the described handgrip connection structural model of assembly, described handgrip
Make deformation mechanism under state and failure mode, structure and non-structural design parameter and described handgrip is connected the impact of assembly property
Rule model, arranges the parameter area that described handgrip connects each parts of assembly, to design the handgrip connection group of described aerostatics
Part.
Further, the parameter of the structural model that described handgrip connects assembly includes: the handgrip cloth width of described gripping structure
W, handgrip cloth heat seal area thickness t, handgrip cloth heat seal zone length m, stiffener quantity n and angle of flare θ, utricule cloth length L, capsule
The stretching prestressing force σ that body cloth width W, packing cloth length l, packing cloth width h and utricule cloth produce under internal pressurising.
Further, in described step S2, flexible loading is used with analytical technology, described handgrip to be connected in the face of assembly
Mode of texturing and breaking load under tensile load are analyzed, including:
Set up the initial parameter that described handgrip connects the structural model of assembly, and elastic modelling quantity and the Poisson of handgrip cloth are set
Ratio, carries out freely-supported constraint to the border of described utricule cloth；
Analyze described handgrip connection assembly and preset the single order buckling mode under tensile load first, extract described handgrip even
The critical buckling coefficient of the structural model of connected components and deformation result；
The structural model analyzing described handgrip connection assembly presets the deformation under tensile load and stress result second, grabs
Hands structure is in face during tensile load effect, and described handgrip cloth exists buckling phenomena, described handgrip with the surface of described utricule cloth
Structure draw direction deformation with load change linearly, the deformation in vertical plane direction has nonlinearity, described
The deformation of the draw direction of gripping structure is the principal element producing structural stress, and the stress level of described gripping structure is with load
Change is linearly.
Further, in described step S3, described structure of setting up is connected assembly with non-structural design parameter to described handgrip
The affecting laws model of performance, including stretching prestressing force, the border width of described utricule cloth, the described handgrip cloth of described utricule cloth
Heat seal area thickness and the width parameter of described handgrip cloth described handgrip is connected the affecting laws of component strain and stress
And height analysis.
Further, in described step S3, the stretching prestressing force of described utricule cloth is connected component strain to described handgrip
With the border width of the affecting laws of stress and amplitude, utricule cloth, described handgrip is connected the impact of component stress level, handgrip
The impact of handgrip connection component strain with stress is analyzed by the heat seal area thickness of cloth and the width of handgrip cloth.
Further, the border width of described utricule cloth is more than 2.5 times of width of described handgrip cloth；The heat of described handgrip cloth
Closing area thickness is 0.2～0.5mm；The width parameter w/W of described handgrip cloth0Excursion is positioned at 0.2～0.4, and wherein, w is
The width of handgrip cloth, W0Initial parameter for the width of handgrip cloth.
The method for designing connecting assembly based on flexible simulated aerostatics handgrip according to embodiments of the present invention, sets up floating
Device handgrip connects the structural model of assembly and arranges structural parameters, and handgrip is even to use flexible loading and analytical technology effectively to predict
Connected components in working order under deformation mechanism and the failure mode that is likely to occur, analytical structure and non-structural design parameter pair
Handgrip connects the affecting laws model of assembly property, can provide handgrip simultaneously and connect the suitable design parameter of assembly design
Scope.The present invention can solve the design of existing aerostatics handgrip and lack effective simulation means, the problems such as design cost is high, thus
Improve aerostatics handgrip designing quality, reduce design cost.
Aspect and advantage that the present invention adds will part be given in the following description, and part will become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or the additional aspect of the present invention and advantage are from combining the accompanying drawings below description to embodiment and will become
Substantially with easy to understand, wherein:
Fig. 1 is the stream of the method for designing connecting assembly based on flexible simulated aerostatics handgrip according to the embodiment of the present invention
Cheng Tu；
Fig. 2 (a) and Fig. 2 (b) are respectively the entirety of aerostatics gripping structure the most according to embodiments of the present invention and partially schematic
Figure；
Fig. 3 is that the handgrip according to the embodiment of the present invention connects component model and main design parameters schematic diagram；
Fig. 4 (a) and Fig. 4 (b) is respectively handgrip according to embodiments of the present invention and connects the flexible simulated analysis of component model
Deformation schematic diagram under the single order buckling mode of process and design load；
Fig. 5 (a) and Fig. 5 (b) is that the handgrip according to the embodiment of the present invention connects the deformation of assembly with stress with load change
Curve synoptic diagram；
Fig. 6 is the signal that the structural danger stress according to the embodiment of the present invention is positioned at handgrip cloth and utricule cloth connecting sewing
Figure；
Fig. 7 is that the structural danger stress according to the embodiment of the present invention is positioned at utricule cloth and packing cloth heat seal border schematic diagram；
Fig. 8 (a) and Fig. 8 (b) is that the utricule cloth prestressing force according to the embodiment of the present invention connects component strain to handgrip and answers
Power affect schematic diagram；
Fig. 9 is that the impact of utricule cloth with packing cloth heat seal boundary stress is shown by the utricule cloth width according to the embodiment of the present invention
It is intended to；
Figure 10 (a) and Figure 10 (b) is that the handgrip cloth heat seal area thickness according to the embodiment of the present invention connects assembly to handgrip
Deformation affects schematic diagram with stress；
Figure 11 (a) and Figure 11 (b) is that the handgrip cloth width according to the embodiment of the present invention connects component strain to handgrip and answers
Power affect schematic diagram.
Detailed description of the invention
Embodiments of the invention are described below in detail, and the example of described embodiment is shown in the drawings, the most from start to finish
Same or similar label represents same or similar element or has the element of same or like function.Below with reference to attached
The embodiment that figure describes is exemplary, it is intended to is used for explaining the present invention, and is not considered as limiting the invention.
As it is shown in figure 1, the method for designing connecting assembly based on flexible simulated aerostatics handgrip of the embodiment of the present invention, bag
Include following steps:
Step S1, connects version and the Joining Technology of assembly according to aerostatics handgrip, sets up handgrip and connects assembly
Structural model, and the main design parameters of clear and definite this structural model.
In one embodiment of the invention, the structural model of handgrip connection assembly includes: gripping structure and gripping structure
The utricule cloth connected and packing cloth.Aerostatics main gasbag surface is typically designed with multiple gripping structure.Grab as in figure 2 it is shown, each
Hands structure includes: in bracing cable 1, joint 2, handgrip cloth 3 and embedding handgrip cloth 3 and stiffener.It is connected with utricule in handgrip end
The reserved open seam in place, is linked together handgrip cloth 3, utricule cloth and packing cloth by heat seal process.
With reference to Fig. 2 (a) and Fig. 2 (b), being shaped as of handgrip cloth 3 is substantially fan-shaped.It should be noted that above-mentioned handgrip cloth 3
Shape is only in order at the purpose of example rather than in order to limit the present invention.The shape of the handgrip cloth 3 on aerostatics is not limited to Fig. 2
Shown shape, it is also possible to for trapezoidal, frog claw type etc., select according to the needs of designer, do not repeat them here.
As it is shown on figure 3, connected the main design parameters of component model by the clear and definite handgrip of force analysis, including handgrip cloth 3
Width w, handgrip cloth 3 heat seal area thickness t, handgrip cloth 3 heat seal zone length m, stiffener quantity n and angle of flare θ, utricule cloth are long
The stretching prestressing force that degree L, utricule cloth width W, packing cloth length l, packing cloth width h and utricule cloth produce under internal pressurising
σ。
Step S2, uses flexible loading and analytical technology, it is thus achieved that handgrip connect the structural model of assembly in working order under
Deformation mechanism and failure mode.
In this step, by gripping structure common by tensile load in face as a example by, use flexible loading and analytical technology
Mode of texturing under tensile load in the face of handgrip connection assembly and breaking load are analyzed.
Specifically, initially set up the initial parameter that handgrip connects the structural model of assembly, and the springform of handgrip cloth 3 is set
Amount and Poisson's ratio, carry out freely-supported constraint to the border of utricule cloth.
By gripping structure common by tensile load in face as a example by, if the bracing cable of gripping structure 1 transmission design load be
F.With reference to aerostatics structure, one group of handgrip is set and connects initial parameter value (the corresponding symbol indexing 0) expression of component model.Its
In, initial parameter value is as follows: W0=560mm, t0=0.2mm, n=4, θ=60 °, L0=W0=2000mm, l0=m0=130mm,
h0=720mm, σ=100MPa.
According to the weaving method of handgrip cloth 3 with utricule cloth material, it is equivalent to isotropic material, its springform is set
Amount E=11GPa, Poisson's ratio ν=0.4, this material damage intensity is about 311MPa.Consider St.Venant boundary effect, by utricule cloth
Border carry out freely-supported constraint.
Then, utilize ABAQUS software that handgrip is connected component model to be analyzed.As shown in Fig. 4 (a), analyze handgrip even
Connected components presets the single order buckling mode under tensile load first, extracts the Critical Buckling that handgrip connects the structural model of assembly
Coefficient and deformation result.Wherein.First to preset tensile load be default less tensile load.The handgrip obtained is connected assembly
Critical buckling coefficient and the deformation result of structural model as subsequent analysis basis.
As shown in Fig. 4 (b), the structural model analyzing handgrip connection assembly is preset the deformation under tensile load second and answers
Power result.In one embodiment of the invention, second tensile load F=20KN is preset.
Owing to Folding Deformation relates to large deformation and difficult convergence problem, need when analyzing to use the non-linear of better astringency
Algorithm Analysis.Fig. 5 (a) and (b) show that handgrip connects the deformation of assembly with stress with load change curve, in conjunction with Fig. 4 to grabbing
The mode of texturing of hands structure is analyzed, be concluded that gripping structure in face during tensile load effect, handgrip cloth 3 with
There is buckling phenomena in utricule cloth surface, gripping structure draw direction deformation with load change linearly, and at vertical plane
The deformation in direction has nonlinearity.The deformation of handgrip draw direction is the principal element producing structural stress, therefore handgrip
The stress level of structure is with load change the most linearly.
Finally, the failure mode that handgrip connects assembly is analyzed and verifies.Specifically, by above-mentioned flexible simulated side
Method, is given at handgrip under two groups of parameter values respectively and connects the stress distribution of component model, and provide corresponding result of the test.Wherein,
Two groups of parameter value respectively handgrip heat seal area thickness t take 0.2mm and take 0.4mm with handgrip heat seal area thickness t, remaining parameter value
Identical.
With reference to Fig. 6 and Fig. 7, in Fig. 6, handgrip heat seal area thickness is 0.2mm, the danger of simulation result display gripping structure
Stress is predominantly located in the middle of handgrip cloth 3 and utricule cloth connecting sewing, it was predicted that during tensile load about 22.5KN, gripping structure with utricule
Junction occurs to be about 22KN by centre to both sides tear failure, the breaking load of corresponding result of the test display handgrip, destroy position
Put identical with simulation result.
In Fig. 7, handgrip heat seal area thickness strengthens as 0.4mm, the main position of severe stress of simulation result display gripping structure
In the middle of utricule cloth and packing cloth heat seal boundary, it was predicted that during tensile load about 32.5KN, handgrip connect assembly utricule cloth with
Occur at packing cloth heat seal to be about 33KN by centre to both sides tear failure, the breaking load of corresponding result of the test display handgrip,
Destroy position identical with simulation result.
To sum up, handgrip can be obtained by flexible simulated analysis method and connect component model change under tensile load in face
Shape mode and breaking load, correlated results is possible not only to obtain verification experimental verification, it is also possible to prediction experiment is difficult to the destruction observed
Process.
Step S3, sets up structure and non-structural design parameter and handgrip is connected the affecting laws model of assembly property, for grabbing
Hands connects the design of assembly provides foundation.
Specifically, the design parameter of handgrip connection component model can be divided into structure and non-structural factor two class.
Structural parameters include: the width of handgrip cloth 3 and thickness, quantity and subtended angle, length and the width of utricule cloth of stiffener
The length of degree and packing cloth and width etc..
Non-structural parameter includes: inflates due to the main gasbag needs of aerostatics and maintains shape and provide rigidity, utricule cloth table
Face can produce the prestressing force relevant with intrinsic pressure size.
When the handgrip designing aerostatics connects assembly, it is necessary to clearly and according to above-mentioned design parameter, handgrip is connected assembly
Rigidity of model and intensity affect relation.
In one embodiment of the invention, the analysis to each structural parameters above-mentioned and non-structural parameter all uses identical
Analysis method.
With the stretching prestressing force of utricule cloth, utricule cloth width, handgrip cloth 3 heat seal area thickness, handgrip cloth 3 width it is below
Above-mentioned parts are connected affecting laws and the analytic explanation of component strain and stress by example to handgrip.It should be noted that above-mentioned choosing
The reason taking above-mentioned quadrinomial parameter is, handgrip connection assembly is under tensile failure mode, and gripping structure is answered by above-mentioned parameter
Force level is more sensitive.
(1) the stretching prestressing force of utricule cloth connects component strain and the affecting laws of stress and amplitude to handgrip
Fig. 8 (a) and (b) show that the stretching prestressing force of utricule cloth connects the affecting laws of component strain and stress to handgrip
And amplitude, its parameter variation range 0～100MPa.
Below the prestressed relation that affects is analyzed: prestressing force acts on utricule cloth surface and is, it is deformed and answers
The impact of power is direct, and prestressed increase improves the face rigidity of utricule cloth, therefore causes the latter to deform reduction.Utricule
The stress level of cloth not only also want superposition stress distribution relevant with pulls deformation, pulls deformation is gradually reduced,
Stress distribution stably increases, and comprehensive function effect makes the stress level of utricule cloth continue to increase.Handgrip cloth 3 is by prestressed
Impact is indirectly, and along with the rigidity of utricule cloth becomes larger, the rigidity of handgrip cloth 3 dies down relatively, therefore deforms increase.
The stress of handgrip cloth 3 is the most relevant with self-deformation, and therefore variation of stress and amplitude are basically identical with deformation.
Utilizing this affecting laws, during design gripping structure, when strength margin is enough, appropriateness increases the prestressing force of utricule cloth can be effective
Ground improves handgrip and connects assembly resistance capacity to deformation.
(2) border width of utricule cloth connects the impact of component stress level to handgrip.
Fig. 9 shows that utricule cloth border width connects the affecting laws of component stress level to handgrip.With utricule cloth width
Ratio W/w with handgrip cloth 3 original width0As parameter, its excursion 1.5～5.With reference to Fig. 9, constant at handgrip cloth 3 width
In the case of, utricule cloth border change width is obvious on distribution and the size impact of self severe stress, and answering handgrip cloth 3
Power distribution and value effect are less.
Utricule cloth area of stress influence is concentrated mainly on utricule cloth and packing cloth heat seal border, when utricule cloth width
Border when heat seal border, structure maximum stress is distributed in two ends, heat seal border, stress value be much larger than center, heat seal border,
This design that handgrip is connected assembly is unfavorable.Along with utricule cloth border is gradually distance from heat seal border, the severe stress on utricule cloth
Gradually moving to centre from two ends, heat seal border, stress numerical is remarkably decreased and tends towards stability.
Preferably, utilize this affecting laws, during design gripping structure, should for avoiding utricule selvedge bound pair handgrip to connect assembly
The impact of power, utricule cloth border suitable width should take more than 2.5 times of handgrip cloth 3 width.
(3) the heat seal area thickness of handgrip cloth 3 and the width of handgrip cloth 3 connect the shadow of component strain and stress to handgrip
Ring
With (b), Figure 10 (a) and (b), Figure 11 (a) show that handgrip cloth 3 heat seal area thickness and handgrip cloth 3 width are to grabbing
Hands connects the impact of component strain and stress, and its thickness parameter t excursion is 0.2～0.5mm, width parameter w/W0Change model
Enclose is 0.2～0.4.By arranging width parameter within the above range, the impact of utricule cloth boundary constraint can be avoided.
With reference to Figure 10 (a) and 10 (b), Figure 11 (a) and (b), under tensile load is constant, handgrip cloth 3 heat seal area thickness
And width is approximated to inverse relation to deformation and the stress influence of handgrip cloth 3.That is, the load on handgrip is mainly by handgrip cloth
3 are delivered on utricule with cross section, utricule cloth heat seal border.For utricule cloth, its deformation and stress level increase with handgrip cloth 3 width
Add and be also substantially reduced, but do not affected by handgrip cloth 3 heat seal area thickness.Therefore, when design, the present invention is grabbed by increase
Hands cloth 3 and the area of section (t × w) on utricule cloth heat seal border so that handgrip connects the possible failure mode of assembly and converted by Fig. 6
To Fig. 7, thus improve the collapse resistance critical load of structure.
Step S4, according to handgrip connect the structural model of assembly, handgrip connect assembly structural model in working order under
Deformation mechanism and failure mode, structure and non-structural design parameter handgrip is connected the affecting laws model of assembly property, if
Put handgrip and connect the design process of assembly and suitable parameter area, to design the handgrip connection assembly of aerostatics.
On the basis of above-mentioned steps S1 to S3 is to handgrip Analysis on Design Parameters, it is achieved aerostatics handgrip connects assembly and sets
Meter.As a example by aerostatics empennage with main gasbag handgrip connecting portion, totally provide specific design and require: at empennage both sides main bag body
On be arranged symmetrically with N=5 handgrip, unilateral total length T is less than 12000mm, and the maximum load in single handgrip bracing cable 1 is
20KN, strength assurance coefficient 1.5.
The flow process that the handgrip of design aerostatics connects assembly is as follows.
A () arranges the shape of handgrip cloth 3, such as isosceles trapezoid, sector or frog claw type etc..Although difform handgrip cloth
3 there are differences with the concrete method of attachment of utricule cloth so that handgrip connection system failure mechanism and design parameter affecting laws
It is not quite similar, but all available method for designing using the present invention is analyzed.As a example by trapezoidal handgrip cloth 3, following step is entered
Row explanation.
B () arranges initial separation d between handgrip cloth 3 original width w and adjacent handgrip cloth 3, wherein distance relation is near
Seemingly there is a following relation: d=W-w, w*N*W/w=T.
According to the Parameter analysis rule in literary composition, it is proposed that W/w takes more than 2.5.Preferably, W/w is 4.Then, handgrip cloth is obtained
Initial separation d=1800mm between original width w=600mm and the adjacent handgrip cloth 3 of 3.
C () arranges handgrip cloth 3 heat seal area thickness t.With reference to law-analysing in step S3, when handgrip cloth 3 heat seal region
After thickness is more than 0.25mm, the failure mode of trapezoidal handgrip connection assembly tears at connecting sewing and becomes the tear of heat seal border, after
Person has higher breaking load, therefore arranges handgrip cloth 3 heat seal area thickness t=0.4mm (two layers of cloth thickness).
D () arranges stiffener in handgrip cloth 3 heat seal zone length m, length l of packing cloth and width h and handgrip cloth 3
Quantity n and subtended angle θ.For parameter m, the analysis of l, h, θ, n, with reference to stretching prestressing force, utricule cloth to utricule cloth in step S3
Width, handgrip cloth 3 heat seal area thickness, the analysis method of handgrip cloth 3 width, repeat no more.
In one embodiment of the invention, engineering typically takes l >=m >=w/4, h >=1.3*w, θ covering as far as possible and exceed ladder
The angle of shape two waist, n takes 4～6.Preferably, l=m=150mm, h=800mm, θ=60 °, n=4.
E () determines that handgrip connects assembly stress distribution under without prestressing force.In given the setting of said process (a)～(d)
After meter parameter primarily determines that, handgrip can be connected assembly intensity under given design load and be analyzed, not consider
Prestressing force in utricule cloth.By flexible simulated analysis, it is thus achieved that the maximum stress of structure is positioned at utricule cloth and packing cloth high frequency sealing edges
In the middle of boundary, numerical value is about 135MPa, and safety coefficient is 2.3, and its intensity can meet general design requirement.
F () determines that handgrip connects the stress distribution of utricule cloth in assembly.
Owing to utricule cloth under gas pressure unavoidably existing certain prestressing force.Analysis according to above-mentioned steps S3
Although the stress that the prestressing force in result utricule cloth can cause handgrip to connect assembly increases, but when strength margin is enough, suitable
Degree increases the prestressing force of utricule cloth can improve handgrip system attack deformability.In step (e), handgrip safety coefficient is 2.3,
Strength margin is relatively big, and therefore the stress distribution of design utricule cloth is less than 60MPa.Under this numerical value, handgrip deformation is the most basic
Tend towards stability.Preferably, σ=50MPa.Under this prestressing force, the handgrip connecting component structure maximum stress level of design is about
174MPa, safety coefficient is 1.8, and intensity meets general design requirement.
To sum up, the present invention connects the design requirement of assembly by analyzing aerostatics handgrip, and combines its minor structure feature, carries
Go out the method for designing connecting assembly based on flexible simulated aerostatics handgrip.By flexible loading and analytical technology, it is thus achieved that grab
Hands connects mode of texturing and the failure mechanism of assembly, sets up structure and non-structural design parameter and handgrip connects the minor structure of assembly
The influence factor of mechanical property, supplement aerostatics handgrip connect assembly design technical support, thus improve designing quality,
Reduce design cost.
The method for designing connecting assembly based on flexible simulated aerostatics handgrip according to embodiments of the present invention, sets up floating
Device handgrip connects the structural model of assembly and arranges structural parameters, and handgrip is even to use flexible loading and analytical technology effectively to predict
Connected components in working order under deformation mechanism and the failure mode that is likely to occur, analytical structure and non-structural design parameter pair
Handgrip connects the affecting laws model of assembly property, can provide handgrip simultaneously and connect the suitable design parameter of assembly design
Scope.The present invention can solve the design of existing aerostatics handgrip and lack effective simulation means, the problems such as design cost is high, thus
Improve aerostatics handgrip designing quality, reduce design cost.
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " specifically show
Example " or the description of " some examples " etc. means to combine this embodiment or example describes specific features, structure, material or spy
Point is contained at least one embodiment or the example of the present invention.In this manual, to the schematic representation of above-mentioned term not
Necessarily refer to identical embodiment or example.And, the specific features of description, structure, material or feature can be any
One or more embodiments or example in combine in an appropriate manner.
Although above it has been shown and described that embodiments of the invention, it is to be understood that above-described embodiment is example
Property, it is impossible to be interpreted as limitation of the present invention, those of ordinary skill in the art is without departing from the principle of the present invention and objective
In the case of above-described embodiment can be changed within the scope of the invention, revise, replace and modification.The scope of the present invention
Extremely it is equal to by claims and limits.
Claims (6)
1. the method for designing connecting assembly based on flexible simulated aerostatics handgrip, it is characterised in that comprise the steps:
Step S1, connects version and the Joining Technology of assembly according to aerostatics handgrip, sets up described handgrip and connects assembly
Structural model, wherein, described handgrip connects the structural model of assembly and includes: the capsule that gripping structure is connected with described gripping structure
Body cloth and packing cloth, described gripping structure includes: bracing cable, joint, handgrip cloth and embed in described handgrip cloth and stiffener；
Step S2, uses flexible loading and analytical technology, it is thus achieved that described handgrip connect the structural model of assembly in working order under
Deformation mechanism and failure mode；
Step S3, sets up structure and non-structural design parameter and described handgrip is connected the affecting laws model of assembly property；
Step S4, connects the structural model of assembly at work shape according to the described handgrip connection structural model of assembly, described handgrip
Deformation mechanism under state and failure mode, structure and non-structural design parameter are connected the affecting laws of assembly property to described handgrip
Model, arranges the parameter area that described handgrip connects each parts of assembly, to design the handgrip connection assembly of described aerostatics.
2. the method for designing of assembly is connected as claimed in claim 1 based on flexible simulated aerostatics handgrip, it is characterised in that
The parameter of the structural model that described handgrip connects assembly includes: the handgrip cloth width w of described gripping structure, handgrip cloth heat seal region
Thickness t, handgrip cloth heat seal zone length m, stiffener quantity n and angle of flare θ, utricule cloth length L, utricule cloth width W, packing cloth
The stretching prestressing force σ that length l, packing cloth width h and utricule cloth produce under internal pressurising.
3. the method for designing of assembly is connected as claimed in claim 2 based on flexible simulated aerostatics handgrip, it is characterised in that
In described step S2, use the deformation that described handgrip is connected in the face of assembly under tensile load by flexible loading and analytical technology
Mode and breaking load are analyzed, including:
Set up described handgrip and connect the initial parameter of structural model of assembly, and elastic modelling quantity and the Poisson's ratio of handgrip cloth are set,
The border of described utricule cloth is carried out freely-supported constraint；
Analyze described handgrip connection assembly and preset the single order buckling mode under tensile load first, extract described handgrip connection group
The critical buckling coefficient of the structural model of part and deformation result；
The structural model analyzing described handgrip connection assembly presets the deformation under tensile load and stress result second, and handgrip is tied
Structure is in face during tensile load effect, and described handgrip cloth exists buckling phenomena, described gripping structure with the surface of described utricule cloth
Draw direction deformation with load change linearly, the deformation in vertical plane direction has nonlinearity, described handgrip
The deformation of the draw direction of structure is the principal element producing structural stress, and the stress level of described gripping structure is with load change
Linearly.
4. the method for designing of assembly is connected as claimed in claim 1 based on flexible simulated aerostatics handgrip, it is characterised in that
In described step S3,
The structural parameters of the structural model that described handgrip connects assembly include: the width of described handgrip cloth and thickness, described reinforcement
The quantity of bar and subtended angle, length and width, the length of described packing cloth and the width of described utricule cloth；
Described handgrip connects the non-structural parameter of structural model of assembly and includes: the surface of described utricule cloth is that produce with intrinsic pressure phase
The prestressing force closed.
5. the method for designing of assembly is connected as claimed in claim 4 based on flexible simulated aerostatics handgrip, it is characterised in that
In described step S3, described structure and the non-structural design parameter set up is connected the affecting laws mould of assembly property to described handgrip
Type, including described utricule cloth stretching prestressing force, the border width of described utricule cloth, described handgrip cloth heat seal area thickness with
And the width parameter of described handgrip cloth connects affecting laws and the height analysis of component strain and stress to described handgrip.
6. the method for designing of assembly is connected as claimed in claim 5 based on flexible simulated aerostatics handgrip, it is characterised in that
The border width of described utricule cloth is more than 2.5 times of the width of described handgrip cloth；
The heat seal area thickness of described handgrip cloth is 0.2～0.5mm；
The width parameter w/W of described handgrip cloth0Excursion is positioned at 0.2～0.4, and wherein, w is the width of handgrip cloth, W0For handgrip
The initial parameter of the width of cloth.
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| US4842221A (en) * | 1988-04-21 | 1989-06-27 | Westinghouse Electric Corp. | Lightning hardened tether cable and an aerostat tethered to a mooring system therewith |
| CN103995920A (en) * | 2014-04-17 | 2014-08-20 | 中国航空工业集团公司沈阳飞机设计研究所 | Edge connection degumming analysis method for flexible connection structure |
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