CN108693064A - One kind can not repair long service structural damage information and determine method and device - Google Patents
One kind can not repair long service structural damage information and determine method and device Download PDFInfo
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- CN108693064A CN108693064A CN201810527245.8A CN201810527245A CN108693064A CN 108693064 A CN108693064 A CN 108693064A CN 201810527245 A CN201810527245 A CN 201810527245A CN 108693064 A CN108693064 A CN 108693064A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/60—Investigating resistance of materials, e.g. refractory materials, to rapid heat changes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
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Abstract
The present invention, which provides one kind and can not repair long service structural damage information, determines method and device, can realize structure and the multi-scale correlation decision of material.The method includes:According to the finite elements simulation result of structure dimension level with the mechanics property analysis of test-material yardstick level as a result, using equivalent stress be associated with across scale registration, emulation obtains the fatigue damage result of service structure;Obtain the fatigue damage result for the service structure material that on-line checking obtains;To across the scale decision of fatigue damage result progress for the service structure material that the fatigue damage result and on-line checking that emulate obtained service structure obtain, the fatigue damage of service structure is determined.The present invention is suitable for determining the damage of service structure.
Description
Technical field
The present invention relates to information analyses and aid decision field, and long service structural damage can not be repaired by particularly relating to one kind
Information determines method and device.
Background technology
When carrying out life search to that can not repair long service structure, this class formation has projected life length, failure number
According to less, material scatter, monomer can not carry out independent experiment the features such as.For example high iron teeth of long service structure can not typically be repaired
Box body, nuclear plant pressure vessels, oil long-distance transport pipes etc. are taken turns, is all based on mechanical structure, lacks the structure of electric function
Part, still the military service truthful data without this kind of Life cycle that can not repair long service structure, to the service life of structure dimension
Analysis and research are based on simulation analysis.It in the accelerated test of laboratory, can carry out that long service structure can not be repaired
The acceleration damage test of composite material, but to can not repair long service structure itself do not have still it is full-scale or large-sized
Accelerated test condition.Therefore consider to carry out Finite Element Simulation Analysis to this kind of typical structure, but since simulation analysis result is
Desired output under certain condition, it is therefore desirable to according to individual of sample feature, simulation result is modified.
Structure is made of material, although material cannot be equal to structure, the performance of the performance of material to structure
There is tremendous influence effect, it therefore, can be using the military service information of basic material come correcting principle simulation analysis result.
For component of machine, material and structure itself be influence parts military service performance two big elements, material for
The influence of structure military service performance accounts for principal element.
Referring to the dimension difference of the different directions of research object across scale has the difference on the order of magnitude.It is led in material science
Domain, multi-scale correlation are a kind of approach for the essential connection for exploring material and structure, and integration and communication macroscopic view, be situated between sight and microcosmic 3
The theory of a scale is the new approaches of design of material research.
Plastic deformation and fracture damage in material failure currently, multi-scale correlation research focuses mostly on, this is mainly examined
Consider, under certain stress condition or in the state of impurity element introducing, the materials chemistry key in micro-scale domain will occur
Variation, such as crystal face cleavage, dislocation nucleation, dislocation motion and plug product, micro-crack extension, crystal boundary migration, dislocation climb, Jin Erhong
The deformation and fracture for seeing scale domain will finally occur.It is considered that structural material is damaged from the micro-scale of material up to showing
Macroscopic deformation or fracture failure belong to the typical case of scale-span analysis research.Generally use Continuum Mechanics and finite element
Analysis method is studied and establishes being merged across Scale Model, while by these methods for Deformation and Breaking of Materials, also by
Step becomes the new direction of multi-scale correlation research.
Therefore, how using the military service information of the basic material of structure come correcting principle simulation analysis as a result, realize structure
With the multi-scale correlation decision of material, become the problem that can not repair long service structural life-time research.
Invention content
It can not repair long service structural damage information the technical problem to be solved in the present invention is to provide one kind and determine method
And device, with the military service information using the basic material of structure come correcting principle simulation analysis as a result, to realize structure and material
The multi-scale correlation decision of material.
In order to solve the above technical problems, the embodiment of the present invention provides one kind, can not to repair long service structural damage information true
Determine method, including:
According to the finite elements simulation result of structure dimension level and the mechanics property analysis of test-material yardstick level as a result, profit
Across scale registration association is carried out with equivalent stress, emulation obtains the fatigue damage result of service structure;
Obtain the fatigue damage result for the service structure material that on-line checking obtains;
To the fatigue for the service structure material that the fatigue damage result and on-line checking that emulate obtained service structure obtain
Damage results carry out across scale decision, determine the fatigue damage of service structure.
Further, the mechanical property of the finite elements simulation result and test-material yardstick level according to structure dimension level
Energy analysis result carries out across scale registration association using equivalent stress, and the fatigue damage result that emulation obtains service structure includes:
Determine the equivalent stress of each key structure position, wherein the m limited lists obtained from the division service structure
Service life shortest n finite elements are selected in member as n key structure position, the equivalent stress σ of key structure position ii
The fatigue damage D of plastic deformation is generated for key structure position iiWhen suffered stress, DiIndicate key structure position i by
The total fatigue damage arrived;
Determine that alternating load amplitude and the relationship between fatigue life are:Wherein, σaIndicate alternating load
Amplitude,Indicate that fatigue strength coefficient, B indicate that fatigue strength exponent, N indicate fatigue life;
By the equivalent stress σ of key structure position iiBring relational expression intoσ in substitutional relation formulaa, calculate
Obtain the fatigue life N of key structure position ii。
Further, the military service knot that the described pair of fatigue damage result for emulating obtained service structure and on-line checking obtain
The fatigue damage result of structure material carries out across scale decision, determines that the fatigue damage of service structure includes:
Determine the discrete domain U={ u of key structure position1,u1,…un, wherein uiFor the discrete of key structure position i
Domain, n indicates the number of key structure position, if F and G are emulation fuzzy set and on-line checking fuzzy set on domain U respectively;
Determine the membership function μ of FF(u) and the membership function μ of GG(u), wherein μF(u) expression emulation obtains tired
The membership function of labor damage results, μG(u) membership function for the fatigue damage result that on-line checking obtains is indicated;
Determine the Hamming distance between fuzzy set F and G;
According to the Hamming distance between determining fuzzy set F and G, the matching degree between fuzzy set F and G is determined;
Judge whether the matching degree is more than or equal to preset threshold value;
If so, the fatigue damage result for the service structure material that on-line checking is obtained is as the fatigue damage of service structure
Hinder result;
Otherwise, then using the smaller value in emulation and on-line checking fatigue damage result as the fatigue damage knot of service structure
Fruit.
Further, it is determined that fuzzy set F and G between Hamming distance be:
Wherein, d (F, G) indicates the Hamming distance between fuzzy set F and G, μF(ui) indicate the key structure position that emulation obtains
Set the membership function of the fatigue damage result of i, μG(ui) indicate the fatigue of key structure position i materials that on-line checking obtains
The membership function of damage results.
Further, it is determined that fuzzy set F and G between matching degree be:
π (F, G)=1-d (F, G)
Wherein, π (F, G) indicates the matching degree between fuzzy set F and G.
The embodiment of the present invention, which also provides one kind, can not repair long service structural damage information determining means, including:
Relating module is used for the mechanical property of the finite elements simulation result and test-material yardstick level according to structure dimension level
Energy analysis result carries out across scale registration association using equivalent stress, and emulation obtains the fatigue damage result of service structure;
Acquisition module, the fatigue damage result for obtaining the service structure material that on-line checking obtains;
Decision-making module, the military service knot for being obtained to the fatigue damage result and on-line checking that emulate obtained service structure
The fatigue damage result of structure material carries out across scale decision, determines the fatigue damage of service structure.
Further, the relating module includes:
First determination unit, the equivalent stress for determining each key structure position, wherein tied from the military service is divided
Service life shortest n finite elements are selected in the m finite elements that structure obtains as n key structure position, key structure
The equivalent stress σ of position iiThe fatigue damage D of plastic deformation is generated for key structure position iiWhen suffered stress, DiTable
Show total fatigue damage that key structure position i is subject to;
Second determination unit, for determining that alternating load amplitude and the relationship between fatigue life be:
Wherein, σaIndicate alternating load amplitude,Indicate that fatigue strength coefficient, B indicate that fatigue strength exponent, N indicate fatigue life;
Third determination unit is used for the equivalent stress σ of key structure position iiBring relational expression intoIt substitutes
σ in relational expressiona, the fatigue life N of key structure position i is calculatedi。
Further, the decision-making module includes:
4th determination unit, the discrete domain U={ u for determining key structure position1,u1,…un, wherein uiTo close
The discrete domain of bond structure position i, n indicates the number of key structure position, if F and G are the emulation fuzzy set on domain U respectively
With on-line checking fuzzy set;
5th determination unit, the membership function μ for determining FF(u) and the membership function μ of GG(u), wherein μF(u)
Indicate the membership function for the fatigue damage result that emulation obtains, μG(u) the fatigue damage result that on-line checking obtains is indicated
Membership function;
6th determination unit, for determining the Hamming distance between fuzzy set F and G;
7th determination unit, for according to the Hamming distance between determining fuzzy set F and G, determine fuzzy set F and G it
Between matching degree;
Judging unit, for judging whether the matching degree is more than or equal to preset threshold value, if so, on-line checking is obtained
The fatigue damage result of the service structure material arrived as service structure fatigue damage as a result, otherwise, then will emulation with it is online
Detect fatigue damage result of the smaller value in fatigue damage result as service structure.
Further, it is determined that fuzzy set F and G between Hamming distance be:
Wherein, d (F, G) indicates the Hamming distance between fuzzy set F and G, μF(ui) indicate the key structure position that emulation obtains
Set the membership function of the fatigue damage result of i, μG(ui) indicate the fatigue of key structure position i materials that on-line checking obtains
The membership function of damage results.
Further, it is determined that fuzzy set F and G between matching degree be:
π (F, G)=1-d (F, G)
Wherein, π (F, G) indicates the matching degree between fuzzy set F and G.
The above-mentioned technical proposal of the present invention has the beneficial effect that:
In said program, according to the mechanical property of the finite elements simulation result and test-material yardstick level of structure dimension level
Analysis result carries out across scale registration association using equivalent stress, and emulation obtains the fatigue damage result of service structure;It obtains
The fatigue damage result for the service structure material that line detects;The fatigue damage result of service structure that obtained to emulation and
The fatigue damage result for the service structure material that line detects carries out across scale decision, determines the fatigue damage of service structure,
To realize the multi-scale correlation decision of structure and material.
Description of the drawings
Fig. 1 is the flow signal provided in an embodiment of the present invention that can not be repaired long service structural damage information and determine method
Figure;
Fig. 2 is that the damage information provided in an embodiment of the present invention between hierarchical scale transmits schematic diagram;
Fig. 3 is the detailed process provided in an embodiment of the present invention that can not be repaired long service structural damage information and determine method
Schematic diagram;
Fig. 4 is damage information across the scale decision provided in an embodiment of the present invention that structure and material are carried out using fuzzy decision
Schematic diagram;
Fig. 5 is gear box of high-speed train body structure S-N Curve schematic diagram provided in an embodiment of the present invention;
Fig. 6 is 7 key structure position views of gear box of high-speed train babinet provided in an embodiment of the present invention;
Fig. 7 is the structural representation provided in an embodiment of the present invention that can not repair long service structural damage information determining means
Figure.
Specific implementation mode
To keep the technical problem to be solved in the present invention, technical solution and advantage clearer, below in conjunction with attached drawing and tool
Body embodiment is described in detail.
Embodiment one
As depicted in figs. 1 and 2, provided in an embodiment of the present invention to repair long service structural damage information determination side
Method, including:
S101, according to the mechanics property analysis knot of the finite elements simulation result of structure dimension level and test-material yardstick level
Fruit carries out across scale registration association using equivalent stress, and emulation obtains the fatigue damage result of service structure;
S102 obtains the fatigue damage result for the service structure material that on-line checking obtains;
S103, the service structure material that the fatigue damage result of service structure and on-line checking obtained to emulation obtains
Fatigue damage result carries out across scale decision, determines the fatigue damage of service structure.
The long service structural damage information that can not repair described in the embodiment of the present invention determines method, according to structure dimension layer
The finite elements simulation result in face is with the mechanics property analysis of test-material yardstick level as a result, using equivalent stress across scale match
Quasi- association, emulation obtain the fatigue damage result of service structure;Obtain the fatigue damage for the service structure material that on-line checking obtains
Hinder result;To the fatigue damage for the service structure material that the fatigue damage result and on-line checking that emulate obtained service structure obtain
Hinder result and carry out across scale decision, the fatigue damage of service structure is determined, to realize that the multi-scale correlation of structure and material is determined
Plan.
In the present embodiment, long service structure can not be repaired, according to the finite elements simulation result of structure dimension level
With the mechanics property analysis of test-material yardstick level as a result, using equivalent stress be associated with across scale registration, emulation is on active service
The fatigue damage result of structure;Before this, as shown in figure 3, need to can not repair long service structure to this carries out various performances
Analysis, such as:Finite element simulation Static Strength Analysis, model analysis and Fatigue Strength Analysis, to select service life shortest key
The position of structure.
It can not be repaired during long service structural damage information determines the specific implementation mode of method aforementioned, further,
The finite elements simulation result according to structure dimension level and the mechanics property analysis of test-material yardstick level are as a result, utilize
Efficacy carries out across scale registration association, and the fatigue damage result that emulation obtains service structure includes:
Obtain the key structure position of the predetermined service structure for Analysis of Fatigue, each key structure
Position is a finite elements;
Determine the equivalent stress of each key structure position, wherein the m limited lists obtained from the division service structure
Service life shortest n finite elements are selected in member as n key structure position, the equivalent stress σ of key structure position ii
The fatigue damage D of plastic deformation is generated for key structure position iiWhen suffered stress, DiIndicate key structure position i by
The total fatigue damage arrived;
Determine that alternating load amplitude and the relationship between fatigue life are:Wherein, σaIndicate alternating load
Amplitude,Indicate that fatigue strength coefficient, B indicate that fatigue strength exponent, N indicate fatigue life;
By the equivalent stress σ of key structure position iiBring relational expression intoσ in substitutional relation formulaa, calculate
Obtain the fatigue life N of key structure position ii。
In the present embodiment, service structure is divided into m finite elements, it is most short that the service life is selected from m finite elements
N finite elements as key structure position, that is to say, that each key structure position is a finite elements, but not
It is that each finite elements is used as a key structure position.
In the present embodiment, the fatigue life of each key structure position is according to the finite elements and its nearby limited
The average value of unit is calculated.
In the present embodiment, during structure fatigue damage, each key structure position i will bear itself unit load and draw
The fatigue damage D risenii, the fatigue damage D that also to be brought by other adjacent cells j interactionij, During Fatigue Damage Process
The damage accumulation that can be decomposed into after multiple static strength loads, according to Miner Cumulative Fatigue Damage rules, each key structure position
Set total fatigue damage D that i is subject toiIt is that it is accumulated by various fatigue damages, DiIt is expressed as:
Di=Dii+∑Dij (1)
Finite element carries out equivalent stress analysis after dividing, wherein the equivalent stress σ of key structure position iiIt is tied for the key
Structure position i generates the fatigue damage D of plastic deformationiWhen suffered stress.
It in the present embodiment, is tested by material mechanical performance, the material cycle under different stress conditions time can be obtained
Number N=[N1,N2,…Nm], wherein the cycle-index that material is undergone before fatigue rupture is known as fatigue life.
In the present embodiment, alternating load amplitude and the relationship between fatigue life are:
In formula (2), σaIndicate alternating load amplitude,Indicate that fatigue strength coefficient, B indicate that fatigue strength exponent, N indicate
Fatigue life.
The alternating load amplitude σ of respective material can be obtained according to formula (2)aRelationship and stress longevity between fatigue life N
Order (S-N) curve.
In the present embodiment, by the research respectively of structure and material level, find " stress " can be used as test-material yardstick with
The contact tie of structure dimension, therefore " equivalent stress " is selected to be registrated standard with the association of structure dimension as test-material yardstick, lead to
Cross the equivalent stress σ of key structure position i after dividing finite elementiσ in substitution formula (2)a, obtain key structure position i's
Fatigue life Ni。
It can not be repaired during long service structural damage information determines the specific implementation mode of method aforementioned, further,
The fatigue damage for the service structure material that the described pair of fatigue damage result for emulating obtained service structure and on-line checking obtain
As a result across scale decision is carried out, determines that the fatigue damage of service structure includes:
Determine the discrete domain U={ u of key structure position1,u1,…un, wherein uiFor the discrete of key structure position i
Domain, n indicates the number of key structure position, if F and G are emulation fuzzy set and on-line checking fuzzy set on domain U respectively;
Determine the membership function μ of FF(u) and the membership function μ of GG(u), wherein μF(u) expression emulation obtains tired
The membership function of labor damage results, μG(u) membership function for the fatigue damage result that on-line checking obtains is indicated;
Determine the Hamming distance between fuzzy set F and G;
According to the Hamming distance between determining fuzzy set F and G, the matching degree between fuzzy set F and G is determined;
Judge whether the matching degree is more than or equal to preset threshold value;
If so, the fatigue damage result for the service structure material that on-line checking is obtained is as the fatigue damage of service structure
Hinder result;
Otherwise, then using the smaller value in emulation and on-line checking fatigue damage result as the fatigue damage knot of service structure
Fruit.
In the present embodiment, as shown in figure 4, being obtained to the fatigue damage result and on-line checking that emulate obtained service structure
The fatigue damage result of service structure material carry out across scale decision, determine that the fatigue damage specific steps of service structure can be with
Including:
A11 determines the fuzzy set and membership function of emulation and on-line checking
If U={ u1,u1,…unBe key structure position discrete domain, wherein uiFor the discrete of key structure position i
Domain, n indicates the number of key structure position, if F and G are emulation fuzzy set and on-line checking fuzzy set on domain U respectively,
F and G are respectively:
Wherein, μF(ui) indicate to emulate the membership function of the fatigue damage result of obtained key structure position i, μG
(ui) indicate the membership function of the fatigue damage result of key structure position i materials that on-line checking obtains.
F and G may be considered the simulation result that can not repair long service structure fatigue damage and on-line checking as a result, then
Membership function between F and G and U is:
μF(u)={ μF(u1),μF(u2),…μF(un)} (5)
μG(u)={ μG(u1),μG(u2),…μG(un)} (6)
Wherein, μF(u) membership function for the fatigue damage result that emulation obtains, μ are indicatedG(u) indicate that on-line checking obtains
Fatigue damage result membership function.
A12 calculates Hamming distance and matching degree
According to the analysis of the equivalent stress of structural material it is found that inside two fuzzy sets of F and G between each finite elements
The similarity degree of relationship can reflect the homogeneity, dispersibility and internal flaw problem of structural material, and the similarity height of F and G can
To think that the simulation calculation of structure and the Analysis of Fatigue difference of on-line checking come from the dispersibility of material, on-line checking knot
The Main Basiss that fruit can be analyzed as material fatigue damage;F it is low with the similarity of G it is considered that both difference essentially from
In the internal flaw of individual finite elements, at this moment need to provide tired damage with simulation result and on-line checking result to integrate
Hinder analytical conclusions.In fuzzy concept, this similarity degree is known as matching degree, can by calculate F and G Hamming distance d (F,
G) reflect the difference between two fuzzy concepts.
According to the Hamming distance d (F, G) of determining F and G, the matching degree π (F, G) between F and G is determined:
π (F, G)=1-d (F, G) (8)
A13, the global of long service structure fatigue damage can not be repaired by, which obtaining, judges
When matching degree is more than or equal to preset threshold value λ, it is believed that two fuzzy concepts of F and G match, and determine to fuzzy
Plan carries out de-fuzzy, and the fatigue damage for that can not repair long service structure has to draw a conclusion:
According to formula (9) it is found that when matching degree is more than or equal to preset threshold value λ, then the military service knot that obtains on-line checking
Fatigue damage result of the fatigue damage result of structure material as service structure;Otherwise, then emulation is damaged with on-line checking fatigue
Hinder fatigue damage result of the smaller value in result as service structure.
In the present embodiment, damage information from test-material yardstick to structure dimension transmits, and is by damage information from micro-scale
It is transmitted to macro-scale, belongs to across dimensional information transmission, information is transmitted different between macroscopical level, and identical material different structure can
It can damage that information gap is not very big, therefore being registrated and being associated with by test-material yardstick and structure dimension, and by the damage of test-material yardstick
Among informix to structure dimension, then the pre- fatigue damage for judging that long service structure can not be repaired utilizes fuzzy decision
The damage information of structure and material is subjected to across scale decision, it is final to determine that the global of On Damage State judges.
The long service structural damage information that can not repair that embodiment provides in order to better illustrate the present invention determines
Method, now according to specific example:In the multi-scale correlation tactics research of gear box of high-speed train body structure and material, application
Long service structural damage information, which can not be repaired, described in provided in an embodiment of the present invention determines that method is specifically described.
The alternating load amplitude σ of the material of high ferro gear box structure is obtained by fatigue test firstaWith fatigue life N it
Between relationship and stress- life.
Fatigue test under 11 different stress is carried out to gear-box material sample, table 1 is that 11 gear box materials try
The fatigue test results of sample:
1 gear-box fatigue of materials experimental result of table
With No. 11 gear-box testing of materials fatigue tests as a result, be fitted to formula (2), obtain:
σa=1549* (2N)-0.1718
According to σa=1549* (2N)-0.1718, gear-box material stress life curve can be obtained, as shown in Figure 5.
Early period to high ferro gear-box gear-box by carrying out finite element simulation Static Strength Analysis, model analysis and fatigue strength
Analysis, the key structure position selection to high ferro gear-box is as shown in fig. 6, share 7 key structure positions, and then carry out limited
Member emulation equivalent stress analysis, can obtain the equivalent stress of gear-box different units, pass through Fig. 5 gear-box S-N Curves
It can obtain the fatigue life N of gear-box key structure positionF:
MF={ NF1, NF2... NF7}
={ 2.6 × 1014,2.9×1013,8.2×1010,4.4×1011,1.3×1012,2.4×1013,4×1010}
Wherein, NFTo emulate the fatigue damage result of obtained service structure.
It according to above-mentioned babinet key structure position, layouts to high ferro gear-box, carries out the platform for carrying acoustic emission system
Frame is tested, and the acoustic emission signal at key structure position can be measured, and utilizes test-material yardstick tank material fatigue damage mistake early period
The performance degradation of journey and life prediction research method, on-line checking obtain the fatigue damage knot of the During Fatigue Damage Process of tank material
Fruit, i.e.,:Life prediction value NG。
Since the fatigue life cycles time numerical value of babinet is larger, logarithm life value is selected, N is denoted aslogFAnd NlogG, into
Row fuzzy decision.
If U={ U1, U1..., U7Be babinet key structure discrete domain, UFAnd UGIt is the babinet knot on domain U respectively
Structure emulates fuzzy set and tank material on-line checking fuzzy set, here UFAnd UGIt can indicate as follows respectively:
In the present embodiment, the matching degree of fuzzy decision Main Basiss F and G determines, therefore the element inside fuzzy set closes
System is affected to the matching degree of two fuzzy sets, selects the computational methods of following membership function:
μF(U) N after=normalizationlogF
μG(U) N after=normalizationlogG
It is possible thereby to calculate the Hamming distance d (F, G) of F and G:
The then matching degree π (F, G) of F and G:
π (F, G)=1-d (F, G)
Finally, to fuzzy result de-fuzzy, fuzzy decision result is provided.Matching degree threshold value λ represents two fuzzy sets
Matching degree, it is considered that, λ takes 0.8 or more matching degree just higher.In the present embodiment, it is assumed that take matching degree threshold value λ=
0.9, it is believed that body structure emulate fuzzy set and tank material on-line checking fuzzy set matching degree to reach 90% with
On, have,
Embodiment two
The present invention also provides a kind of specific implementation mode that can not repair long service structural damage information determining means, by
In the long service structural damage information determining means provided by the invention that can not repair long service structure can not be repaired with aforementioned
Damage information determines that the specific implementation mode of method is corresponding, this can not repair long service structural damage information determining means can
To be achieved the object of the present invention by executing the process step in above method specific implementation mode, therefore above-mentioned can not repair
Long service structural damage information determines the explanation in method specific implementation mode, be also applied for it is provided by the invention can not
The specific implementation mode for repairing long service structural damage information determining means, will in present invention specific implementation mode below
It repeats no more.
As shown in fig. 7, the embodiment of the present invention, which also provides one kind, can not repair long service structural damage information determining means,
Including:
Relating module 11 is used for the mechanics of the finite elements simulation result and test-material yardstick level according to structure dimension level
Results of performance analysis carries out across scale registration association using equivalent stress, and emulation obtains the fatigue damage result of service structure;
Acquisition module 12, the fatigue damage result for obtaining the service structure material that on-line checking obtains;
Decision-making module 13, the military service for being obtained to the fatigue damage result and on-line checking that emulate obtained service structure
The fatigue damage result of structural material carries out across scale decision, determines the fatigue damage of service structure.
Long service structural damage information determining means can not be repaired described in the embodiment of the present invention, according to structure dimension layer
The finite elements simulation result in face is with the mechanics property analysis of test-material yardstick level as a result, using equivalent stress across scale match
Quasi- association, emulation obtain the fatigue damage result of service structure;Obtain the fatigue damage for the service structure material that on-line checking obtains
Hinder result;To the fatigue damage for the service structure material that the fatigue damage result and on-line checking that emulate obtained service structure obtain
Hinder result and carry out across scale decision, the fatigue damage of service structure is determined, to realize that the multi-scale correlation of structure and material is determined
Plan.
In the aforementioned specific implementation mode that can not repair long service structural damage information determining means, further,
The relating module includes:
First determination unit, the equivalent stress for determining each key structure position, wherein tied from the military service is divided
Service life shortest n finite elements are selected in the m finite elements that structure obtains as n key structure position, key structure
The equivalent stress σ of position iiThe fatigue damage D of plastic deformation is generated for key structure position iiWhen suffered stress, DiTable
Show total fatigue damage that key structure position i is subject to;
Second determination unit, for determining that alternating load amplitude and the relationship between fatigue life be:
Wherein, σaIndicate alternating load amplitude,Indicate that fatigue strength coefficient, B indicate that fatigue strength exponent, N indicate fatigue life;
Third determination unit is used for the equivalent stress σ of key structure position iiBring relational expression intoIt substitutes
σ in relational expressiona, the fatigue life N of key structure position i is calculatedi。
In the aforementioned specific implementation mode that can not repair long service structural damage information determining means, further,
The decision-making module includes:
4th determination unit, the discrete domain U={ u for determining key structure position1,u1,…un, wherein uiTo close
The discrete domain of bond structure position i, n indicates the number of key structure position, if F and G are the emulation fuzzy set on domain U respectively
With on-line checking fuzzy set;
5th determination unit, the membership function μ for determining FF(u) and the membership function μ of GG(u), wherein μF(u)
Indicate the membership function for the fatigue damage result that emulation obtains, μG(u) the fatigue damage result that on-line checking obtains is indicated
Membership function;
6th determination unit, for determining the Hamming distance between fuzzy set F and G;
7th determination unit, for according to the Hamming distance between determining fuzzy set F and G, determine fuzzy set F and G it
Between matching degree;
Judging unit, for judging whether the matching degree is more than or equal to preset threshold value, if so, on-line checking is obtained
The fatigue damage result of the service structure material arrived as service structure fatigue damage as a result, otherwise, then will emulation with it is online
Detect fatigue damage result of the smaller value in fatigue damage result as service structure.
In the aforementioned specific implementation mode that can not repair long service structural damage information determining means, further,
Hamming distance between determining fuzzy set F and G is:
Wherein, d (F, G) indicates the Hamming distance between fuzzy set F and G, μF(ui) indicate the key structure position that emulation obtains
Set the membership function of the fatigue damage result of i, μG(ui) indicate the fatigue of key structure position i materials that on-line checking obtains
The membership function of damage results.
In the aforementioned specific implementation mode that can not repair long service structural damage information determining means, further,
Matching degree between determining fuzzy set F and G is:
π (F, G)=1-d (F, G)
Wherein, π (F, G) indicates the matching degree between fuzzy set F and G.
It should be noted that herein, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.
The above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, without departing from the principles of the present invention, several improvements and modifications can also be made, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (10)
1. one kind can not repair long service structural damage information and determine method, which is characterized in that including:
According to the finite elements simulation result of structure dimension level and the mechanics property analysis of test-material yardstick level as a result, utilizing
Efficacy carries out across scale registration association, and emulation obtains the fatigue damage result of service structure;
Obtain the fatigue damage result for the service structure material that on-line checking obtains;
To the fatigue damage for the service structure material that the fatigue damage result and on-line checking that emulate obtained service structure obtain
As a result across scale decision is carried out, determines the fatigue damage of service structure.
2. the long service structural damage information according to claim 1 that can not repair determines method, which is characterized in that described
The effects such as according to the mechanics property analysis of the finite elements simulation result of structure dimension level and test-material yardstick level as a result, utilize
Power carries out across scale registration association, and the fatigue damage result that emulation obtains service structure includes:Determine each key structure position
Equivalent stress, wherein from dividing, that the service life shortest n is selected in the m finite elements that the service structure obtains is a limited
Unit is as n key structure position, the equivalent stress σ of key structure position iiPlasticity is generated for key structure position i to become
The fatigue damage D of shapeiWhen suffered stress, DiIndicate total fatigue damage that key structure position i is subject to;
Determine that alternating load amplitude and the relationship between fatigue life are:σa=σ 'f(2N)b, wherein σaIndicate alternating load width
Value, σ 'fIndicate that fatigue strength coefficient, B indicate that fatigue strength exponent, N indicate fatigue life;
By the equivalent stress σ of key structure position iiBring relational expression σ intoa=σ 'f(2N)b, the σ in substitutional relation formulaa, it is calculated
The fatigue life N of key structure position ii。
3. the long service structural damage information according to claim 2 that can not repair determines method, which is characterized in that described
To the fatigue damage result for the service structure material that the fatigue damage result and on-line checking that emulate obtained service structure obtain
Across scale decision is carried out, determines that the fatigue damage of service structure includes:
Determine the discrete domain U={ u of key structure position1,u1,…un, wherein uiFor the discrete domain of key structure position i,
N indicates the number of key structure position, if F and G are emulation fuzzy set and on-line checking fuzzy set on domain U respectively;
Determine the membership function μ of FF(u) and the membership function μ of GG(u), wherein μF(u) the fatigue damage that emulation obtains is indicated
Hinder the membership function of result, μG(u) membership function for the fatigue damage result that on-line checking obtains is indicated;
Determine the Hamming distance between fuzzy set F and G;
According to the Hamming distance between determining fuzzy set F and G, the matching degree between fuzzy set F and G is determined;
Judge whether the matching degree is more than or equal to preset threshold value;
If so, the fatigue damage result for the service structure material that on-line checking is obtained is as the fatigue damage knot of service structure
Fruit;
Otherwise, then using the smaller value in emulation and on-line checking fatigue damage result as the fatigue damage result of service structure.
4. the long service structural damage information according to claim 3 that can not repair determines method, which is characterized in that determine
Fuzzy set F and G between Hamming distance be:
Wherein, d (F, G) indicates the Hamming distance between fuzzy set F and G, μF(ui) indicate the key structure position i that emulation obtains
Fatigue damage result membership function, μG(ui) indicate the fatigue damage of key structure position i materials that on-line checking obtains
As a result membership function.
5. the long service structural damage information according to claim 4 that can not repair determines method, which is characterized in that determine
Fuzzy set F and G between matching degree be:
π (F, G)=1-d (F, G)
Wherein, π (F, G) indicates the matching degree between fuzzy set F and G.
6. one kind can not repair long service structural damage information determining means, which is characterized in that including:
Relating module, for being divided according to the finite elements simulation result of structure dimension level and the mechanical property of test-material yardstick level
As a result, carrying out across scale registration association using equivalent stress, emulation obtains the fatigue damage result of service structure for analysis;
Acquisition module, the fatigue damage result for obtaining the service structure material that on-line checking obtains;
Decision-making module, the service structure material for being obtained to the fatigue damage result and on-line checking that emulate obtained service structure
The fatigue damage result of material carries out across scale decision, determines the fatigue damage of service structure.
7. according to claim 6 can not repair long service structural damage information determining means, which is characterized in that described
Relating module includes:
First determination unit, the equivalent stress for determining each key structure position, wherein obtained from the service structure is divided
To m finite elements in select service life shortest n finite elements as n key structure position, key structure position i
Equivalent stress σiThe fatigue damage D of plastic deformation is generated for key structure position iiWhen suffered stress, DiIndicate crucial
Total fatigue damage that locations of structures i is subject to;
Second determination unit, for determining that alternating load amplitude and the relationship between fatigue life be:σa=σ 'f(2N)b, wherein
σaIndicate alternating load amplitude, σ 'fIndicate that fatigue strength coefficient, B indicate that fatigue strength exponent, N indicate fatigue life;
Third determination unit is used for the equivalent stress σ of key structure position iiBring relational expression σ intoa=σ 'f(2N)b, substitutional relation
σ in formulaa, the fatigue life N of key structure position i is calculatedi。
8. according to claim 7 can not repair long service structural damage information determining means, which is characterized in that described
Decision-making module includes:
4th determination unit, the discrete domain U={ u for determining key structure position1,u1,…un, wherein uiIt is tied for key
The discrete domain of structure position i, n indicate the number of key structure position, if F and G be respectively emulation fuzzy set on domain U and
Line detects fuzzy set;
5th determination unit, the membership function μ for determining FF(u) and the membership function μ of GG(u), wherein μF(u) it indicates
Emulate the membership function of obtained fatigue damage result, μG(u) being subordinate to for the fatigue damage result that on-line checking obtains is indicated
Spend function;
6th determination unit, for determining the Hamming distance between fuzzy set F and G;
7th determination unit, for according to the Hamming distance between determining fuzzy set F and G, determining between fuzzy set F and G
Matching degree;
Judging unit, for judging whether the matching degree is more than or equal to preset threshold value, if so, on-line checking is obtained
The fatigue damage result of service structure material as service structure fatigue damage as a result, otherwise, then will emulation and on-line checking
Fatigue damage result of the smaller value as service structure in fatigue damage result.
9. according to claim 8 can not repair long service structural damage information determining means, which is characterized in that determine
Fuzzy set F and G between Hamming distance be:
Wherein, d (F, G) indicates the Hamming distance between fuzzy set F and G, μF(ui) indicate the key structure position i that emulation obtains
Fatigue damage result membership function, μG(ui) indicate the fatigue damage of key structure position i materials that on-line checking obtains
As a result membership function.
10. according to claim 9 can not repair long service structural damage information determining means, which is characterized in that really
Matching degree between fixed fuzzy set F and G is:
π (F, G)=1-d (F, G)
Wherein, π (F, G) indicates the matching degree between fuzzy set F and G.
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