CN109635368A - Bridge structure design looks for type method and device - Google Patents
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Abstract
The embodiment of the present invention provides a kind of bridge structure design and looks for type method and device, this method comprises: S1, establishing the initial configuration model of bridge, and carries out static construction analysis to initial configuration model；S2, it is analyzed based on static construction as a result, carrying out topological optimization, acquisition optimal structure model by constraint condition of volume reduction and by objective function of maximum rigidity to initial configuration model；If S3, judgement know that optimal structure model meets optimization design target, using optimal structure model as the structural model of bridge.The embodiment of the present invention is by carrying out topological optimization by constraint condition of volume reduction and by objective function of maximum rigidity to initial configuration model, the optimal structure model of acquisition has higher stress and smaller quality compared to the initial configuration model that traditional Bridge Design method obtains, so as to reduce material cost, bigger economic benefit is obtained.
Description
Technical field
The present embodiments relate to field of structural design, more particularly, to a kind of bridge structure design look for type method and
Device.
Background technique
The design object of bridge structure is with the smallest into the requirement for meeting service performance originally.Traditional structure design
In, the initial form of structure is derived mainly from the experience and intuition of designer.Although structure is also needed by into one on this basis
The optimization of step ensures that it meets requirements with checking computations, but too big variation can't occur for structural form.It is designed in structure
Initial stage, each decision can generate important and far-reaching influence to performance of the structure in life cycle management.It is traditional based on
The design pattern of experience and intuition has very big contingency and blindness, and limits bridge system and form to a certain extent
Innovation.
Summary of the invention
To solve the above-mentioned problems, the embodiment of the present invention provides one kind and overcomes the above problem or at least be partially solved
The bridge structure design for stating problem looks for type method and device.
According to a first aspect of the embodiments of the present invention, a kind of bridge structure design is provided and looks for type method, this method comprises:
S1, the initial configuration model for establishing bridge, and static construction analysis is carried out to initial configuration model；S2, divided based on static construction
Analysis is as a result, carry out initial configuration model by constraint condition of volume reduction and by objective function of maximum rigidity topological excellent
Change, obtains optimal structure model；If S3, judgement know that optimal structure model meets optimization design target, structure mould will be optimized
Structural model of the type as bridge.
Second aspect according to embodiments of the present invention provides a kind of bridge structure design and looks for type device, which includes: to build
Formwork erection block carries out static construction analysis for establishing the initial configuration model of bridge, and to initial configuration model；Optimization module,
For based on static construction analyze as a result, by constraint condition of volume reduction and using maximum rigidity be objective function to initial
Structural model carries out topological optimization, obtains optimal structure model；Judgment module, if for judging to know that optimal structure model meets
Optimization design target, then using optimal structure model as the structural model of bridge
According to a third aspect of the embodiments of the present invention, a kind of electronic equipment, including memory, processor and storage are provided
On a memory and the computer program that can run on a processor, processor is realized various such as first aspect when executing program
Bridge structure design provided by any possible implementation looks for type method in possible implementation.
According to a fourth aspect of the embodiments of the present invention, a kind of non-transient computer readable storage medium is provided, is deposited thereon
Computer program is contained, is realized in the various possible implementations such as first aspect when which is executed by processor
Bridge structure design provided by any possible implementation looks for type method.
Bridge structure design provided in an embodiment of the present invention looks for type method and device, by based on static construction analysis knot
Fruit carries out topological optimization by constraint condition of volume reduction and by objective function of maximum rigidity to initial configuration model,
Obtain optimal structure model；And after judging that optimal structure model meets optimization design target, using optimal structure model as bridge
The structural model of beam.By by constraint condition of volume reduction and by objective function of maximum rigidity to initial configuration model
Topological optimization is carried out, the initial configuration model that the optimal structure model of acquisition is obtained compared to traditional Bridge Design method has
Higher stress and smaller quality obtain bigger economic benefit so as to reduce material cost.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described.It should be evident that the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Other attached drawings are obtained according to these figures.
Fig. 1 is the flow diagram that bridge structure design provided in an embodiment of the present invention looks for type method；
Fig. 2 is the effect diagram of initial configuration model provided in an embodiment of the present invention；
Fig. 3 is the structural schematic diagram that bridge structure design provided in an embodiment of the present invention looks for type device；
Fig. 4 is the entity structure schematic diagram of electronic equipment provided in an embodiment of the present invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical solution in the embodiment of the present invention is explicitly described, it is clear that described embodiment is the present invention
A part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not having
Every other embodiment obtained under the premise of creative work is made, shall fall within the protection scope of the present invention.
The embodiment of the present invention provides a kind of bridge structure design and looks for type method, and this method is suitable for bridge structure design.Ginseng
See Fig. 1, this method comprises:
S1, the initial configuration model for establishing bridge, and static construction analysis is carried out to initial configuration model.
Wherein, initial configuration model is the analysis model of bridge structure, can carry out preliminary finite element based on this model
Analysis.When establishing the initial configuration model, can specifically be established according to the initial designs drawing of bridge.The embodiment of the present invention pair
The concrete mode of foundation is not construed as limiting, for example, passing through SolidWorks etc. using existing support structure designs method first
3 d modeling software establishes the threedimensional model of bridge structure, and the threedimensional model of foundation can be as shown in Fig. 2, include superstructure under
Portion's structure；Then, established threedimensional model can be exported as step file, imported into ABAQUS finite element analysis software and builds
Vertical finite element model (i.e. initial configuration model), and static construction analysis is carried out to initial configuration model, it can get static construction
Analyze result.
S2, it is analyzed based on static construction as a result, by constraint condition of volume reduction and using maximum rigidity as target letter
Several pairs of initial configuration models carry out topological optimization, obtain optimal structure model.
Wherein, since there is an urgent need to one kind to provide knot at design initial stage for designer for structure in the prior art design
The reasonable initial configuration of structure looks for type means, and therefore, the embodiment of the present invention sets structural Topology Optimization Technology application in bridge structure
Meter is looked in type method.Dimensionally-optimised, the room for improvement of structure ten at this time in traditional structure optimization concern detail design stage
Divide limited.Structural Topology Optimization (the also referred to as shape optimum of broad sense) seeks the Optimal Distribution of entity part in a continuous space.
Due in process of topology optimization, the primary condition of structure limits less, and both the not no quantity and connection type of component, did not had yet
The geomery of component, therefore can be used in bridge conceptual phase that type is looked for study, to be obtained most at the beginning of Bridge Design
It is possible that realizing the bridge alternatives of structural material Optimal Distribution, material is saved significantly, obtains bigger economic benefit.
It specifically, can be to initial configuration after the static construction analysis result that initial configuration model is obtained according to step S1
Model carries out topological optimization.SIMP method specifically can be used in topological optimization, and this method is using volume reduction as constraint condition, with maximum
Rigidity is objective function, is to guarantee the maximum rigidity of structure while volume is reduced.Topologies are with unit (entire mould
Type is composed of multiple units) pseudo- density show that cell density height should then retain this element, and cell density is low, can remove this list
Member, retains and removal is determined according to required volume reduction, for example, volume reduction can be set as 10%.It reduces initial
The model obtained after the volume of structural model is optimal structure model.In addition, topological analysis specifically can be in ABAQUS finite element
It analyzes and carries out topological analysis in the Tosca of software, i.e., the result first based on static construction analysis carries out topological optimization.
If S3, judgement know that optimal structure model meets optimization design target, using optimal structure model as bridge
Structural model.
Specifically, it after obtaining optimal structure model in step s 2, needs to judge optimal structure model, confirm
It, could be using the optimal structure model as the structural model of bridge, i.e. conduct after optimal structure model meets optimization design target
The final result for looking for type to obtain, optimization is completed at this time.The embodiment of the present invention is not construed as limiting optimization design target, such as can incite somebody to action
Structural stress value added, architecture quality decreasing value and material cost decreasing value etc. are used as optimization design target, thus compared to first
Beginning structural model, the optimal structure model as final result can have better performance.
Method provided in an embodiment of the present invention, by being analyzed based on static construction as a result, being constraint item with volume reduction
Part and using maximum rigidity be objective function to initial configuration model carry out topological optimization, obtain optimal structure model；And sentencing
After disconnected optimal structure model meets optimization design target, using optimal structure model as the structural model of bridge.By with volume
Reduction amount is constraint condition and carries out topological optimization, the optimization of acquisition to initial configuration model by objective function of maximum rigidity
Structural model has higher stress and smaller matter compared to the initial configuration model that traditional Bridge Design method obtains
Amount obtains bigger economic benefit so as to reduce material cost.
Content based on the above embodiment carries out static(al) knot to initial configuration model in S1 as a kind of alternative embodiment
Structure analysis, comprising: define material properties, cell type and the boundary condition of initial configuration model；In initial configuration model jackshaft
Apply load on the substructure contact surface of beam, static construction analysis is carried out to initial configuration model based on boundary condition.
Specifically, can in ANSYS software definition material attribute, used material category in the initial configuration model of bridge
Property is for example shown in the following table 1:
1 material properties of table
| Title material | Density/kgm^-3 | Young's modulus/GP | Poisson's ratio |
| AL | 2.9 | 0.07 | 0.33 |
In addition, SOLID45 can be defined as cell type.
For the definition of boundary condition, as a kind of alternative embodiment, the boundary condition for defining initial configuration model includes:
It is fixed constraint by the restrained boundary conditional definition of two supports in initial configuration model, and constrains support in translation direction
Freedom degree.Specifically, boundary condition includes restrained boundary condition, when defining boundary condition, defines initial bridge structure first
The restrained boundary condition of two supports is fixed constraint in model, and it is free then to constrain any translation direction of two supports of bridge
Degree.
After having defined above-mentioned material attribute, cell type and boundary condition, load can be loaded in initial configuration model
On Bridge substructure contact surface, the embodiment of the present invention is not construed as limiting the size of load, for example, 10MPa.Based on application
Load and boundary condition can to initial configuration model carry out static construction analysis, static construction analysis specifically can be used it is above-mentioned
ANSYS software.
Content based on the above embodiment, as a kind of alternative embodiment, in S2 using volume reduction as constraint condition with
And using maximum rigidity as objective function to initial configuration model carry out topological optimization before, further includes: will be in initial configuration model
The superstructure of bridge be defined as optimization region, and the substructure of initial configuration model Bridge is defined as unoptimizable
Region；Correspondingly, topological optimization is carried out to initial configuration model, comprising: retain the substructure being located at immediately below load impacting,
And remove the material in superstructure.
Specifically, the characteristics of being based on Bridge Design, the embodiment of the present invention define optimization region before carrying out topological optimization
For the superstructure of initial configuration model Bridge, the substructure that unoptimizable region is initial configuration model Bridge is defined,
Optimization region is the region for increasing and decreasing material in initial configuration model.Therefore, in topological optimization, design variable is optimization region
In cell density, bridge lower junction can be retained to (i.e. unoptimizable region) in the underface of load impacting according to optimum results
Structure material, bridge superstructure (i.e. optimization region) removal material, obtains the optimal structure model of Preliminary design completion after removal.
Content based on the above embodiment, as a kind of alternative embodiment, after S3, further includes: if optimization is known in judgement
Structural model is unsatisfactory for optimization design target, then modifies optimization region and/or constraint condition and repeat S2 and S3, Zhi Daoyou
Change structural model and meets optimization design target.Specifically, it if optimal structure model is unsatisfactory for optimization design target, needs to modify
Optimize region and/or constraint condition to repeat above-mentioned steps S2 and S3.Above-mentioned execution can be understood as iteration execution, and can
40 steps are set by greatest iteration step number, convergence criterion meets objective function rule and cell density rule, objective function rule
Convergence tolorence is set as 0.001, and cell density rule convergence tolorence is set as 0.005.
Content based on the above embodiment, as a kind of alternative embodiment, if to know that optimal structure model meets excellent for judgement
Change design object, then using optimal structure model as the structural model of bridge, comprising: to initial configuration model and optimization structure mould
Type carries out static construction analysis respectively, obtains the rigidity and quality of initial configuration model and optimal structure model；Relatively more initial knot
The rigidity and quality of structure model and optimal structure model, if comparison result meets optimization design target, by optimal structure model
Structural model as bridge.
Specifically, by the model of optimization front and back, the analysis of finite element static construction is carried out respectively, and compare its rigidity and matter
Amount, judges whether the purpose for meeting optimization.Comparing result can be as shown in table 2 below:
2 comparison result of table
By comparing result it is found that comparing the bridge structure (initial configuration model) before topological optimization, the bridge after optimization
The stress of structure (optimal structure model) significantly improves, and overall quality is also mitigated, and material cost is reduced, and meets optimization and sets
The design requirement of meter.
Content based on the above embodiment, as a kind of alternative embodiment, objective function are as follows:
Constraint condition are as follows:
In formula, C (X) is malformation energy, and U is malformation total displacement matrix, and K is structure global stiffness matrix, and N is to divide
Unit sum, ueFor element displacement vector, k0For element stiffness, VjFor the volume that vary during topological structure optimization,For
The volume of the initial configuration model of bridge, F are uniform load suffered by structure, xjFor the relative density of bridge.
Since malformation can be inversely proportional with rigidity, when malformation can be minimum, rigidity is maximum.
Bridge structure design based on the embodiment of the present invention based on topological optimization looks for type method, specifically includes as follows
Step: establishing the analysis model of bridge initial configuration, carries out preliminary finite element analysis on this basis；Carry out static construction point
Analysis, then analyzed based on static construction as a result, selection optimization region, carries out topological optimization to initial bridge structural model, according to excellent
Change as a result, increase and decrease cast material；By finite element method to the stress and Displacement Analysis of the finite element model before and after topological optimization
Whether comparison, analysis topological optimization result meet design requirement.By utilizing topological optimization to remove material on bridge initial configuration
The method of material optimizes the stress distribution of bridge structure, mitigates quality, reduces material cost, realizes structural material most optimal sorting
The bridge alternatives of cloth.
Content based on the above embodiment, the embodiment of the invention provides a kind of bridge structure designs to look for type device, the bridge
Girder construction design looks for bridge structure design of the type device for executing in above method embodiment to look for type method.Referring to Fig. 3, the dress
Set includes: to establish module 301, optimization module 302 and judgment module 303；Wherein, module 301 is established, for establishing the first of bridge
Beginning structural model, and static construction analysis is carried out to initial configuration model；Optimization module 302, for being analyzed based on static construction
As a result, it is excellent to carry out topology to initial configuration model by constraint condition of volume reduction and by objective function of maximum rigidity
Change, obtains optimal structure model；Judgment module 303, if for judging to know that optimal structure model meets optimization design target,
Using optimal structure model as the structural model of bridge.
Specifically, module 301 is established when establishing the initial configuration model, it specifically can be according to the initial designs drawing of bridge
To establish.The embodiment of the present invention is not construed as limiting the concrete mode for establishing the foundation of module 301, initially sets up the three-dimensional of bridge structure
Model, then, established threedimensional model can be exported as step file by establishing module 301, imported into ABAQUS finite element fraction
It is established finite element model (i.e. initial configuration model) in analysis software, and static construction analysis is carried out to initial configuration model, can obtained
It obtains static construction and analyzes result.After establishing the static construction analysis result that module 301 obtains initial configuration model, optimization module
302 can carry out topological optimization to initial configuration model.SIMP method specifically can be used in topological optimization, reduces the body of initial configuration model
The model obtained after product is optimal structure model.After obtaining optimal structure model in optimization module 302, judgment module 303
It needs to judge optimal structure model, it, could be by the optimization after confirmation optimal structure model meets optimization design target
Structural model of the structural model as bridge, i.e., as the final result for looking for type to obtain, optimization is completed at this time.
Device provided in an embodiment of the present invention, by being analyzed based on static construction as a result, being constraint item with volume reduction
Part and using maximum rigidity be objective function to initial configuration model carry out topological optimization, obtain optimal structure model；And sentencing
After disconnected optimal structure model meets optimization design target, using optimal structure model as the structural model of bridge.By with volume
Reduction amount is constraint condition and carries out topological optimization, the optimization of acquisition to initial configuration model by objective function of maximum rigidity
Structural model has higher stress and smaller matter compared to the initial configuration model that traditional Bridge Design method obtains
Amount obtains bigger economic benefit so as to reduce material cost.
The embodiment of the invention provides a kind of electronic equipment, as shown in figure 4, the equipment includes: processor (processor)
401, communication interface (Communications Interface) 402, memory (memory) 403 and communication bus 404,
In, processor 401, communication interface 402, memory 403 completes mutual communication by communication bus 404.Processor 401 can
To call the computer program that can be run on memory 403 and on processor 401, to execute the bridge of the various embodiments described above offer
Type method is looked in girder construction design, for example, S1, the initial configuration model for establishing bridge, and initial configuration model is carried out quiet
Power structural analysis；S2, it is analyzed based on static construction as a result, being constraint condition and using maximum rigidity as target using volume reduction
Function carries out topological optimization to initial configuration model, obtains optimal structure model；If S3, judgement know that optimal structure model meets
Optimization design target, then using optimal structure model as the structural model of bridge.
In addition, the logical order in above-mentioned memory 403 can be realized by way of SFU software functional unit and conduct
Independent product when selling or using, can store in a computer readable storage medium.Based on this understanding, originally
Substantially the part of the part that contributes to existing technology or the technical solution can be in other words for the technical solution of invention
The form of software product embodies, which is stored in a storage medium, including some instructions to
So that a computer equipment (can be personal computer, server or the network equipment etc.) executes each implementation of the present invention
The all or part of the steps of example method.And storage medium above-mentioned includes: USB flash disk, mobile hard disk, read-only memory (ROM, Read-
Only Memory), random access memory (RAM, Random Access Memory), magnetic or disk etc. are various can be with
Store the medium of program code.
The embodiment of the present invention also provides a kind of non-transient computer readable storage medium, is stored thereon with computer program,
The computer program is implemented to carry out the various embodiments described above offer bridge structure design when being executed by processor looks for type method, example
Such as include: S1, the initial configuration model for establishing bridge, and static construction analysis is carried out to initial configuration model；S2, it is based on static(al)
Results of structural analysis is carried out by constraint condition of volume reduction and by objective function of maximum rigidity to initial configuration model
Topological optimization obtains optimal structure model；It, will optimization if S3, judgement know that optimal structure model meets optimization design target
Structural model of the structural model as bridge.
The embodiments such as electronic equipment described above are only schematical, wherein unit as illustrated by the separation member
It may or may not be physically separated, component shown as a unit may or may not be physics list
Member, it can it is in one place, or may be distributed over multiple network units.It can be selected according to the actual needs
In some or all of the modules achieve the purpose of the solution of this embodiment.Those of ordinary skill in the art are not paying creativeness
Labour in the case where, it can understand and implement.
Through the above description of the embodiments, those skilled in the art can be understood that each embodiment can
It realizes by means of software and necessary general hardware platform, naturally it is also possible to pass through hardware.Based on this understanding, on
Stating technical solution, substantially the part that contributes to existing technology can be embodied in the form of software products in other words, should
Computer software product may be stored in a computer readable storage medium, such as ROM/RAM, magnetic disk, CD, including several fingers
It enables and using so that a computer equipment (can be personal computer, server or the network equipment etc.) executes each implementation
Certain Part Methods of example or embodiment.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (10)
1. a kind of bridge structure design looks for type method characterized by comprising
S1, the initial configuration model for establishing bridge, and static construction analysis is carried out to the initial configuration model；
S2, it is analyzed based on static construction as a result, by constraint condition of volume reduction and using maximum rigidity as objective function pair
The initial configuration model carries out topological optimization, obtains optimal structure model；
If S3, judgement know that the optimal structure model meets optimization design target, using the optimal structure model as institute
State the structural model of bridge.
2. the method according to claim 1, wherein carrying out static(al) knot to the initial configuration model in the S1
Structure analysis, comprising:
Define material properties, cell type and the boundary condition of the initial configuration model；
Apply load on the substructure contact surface of the initial configuration model Bridge, based on the boundary condition to described
Initial configuration model carries out static construction analysis.
3. according to the method described in claim 2, it is characterized in that, in the S2 using volume reduction as constraint condition and with
Maximum rigidity be objective function to the initial configuration model carry out topological optimization before, further includes: by the initial configuration mould
The superstructure of bridge in type is defined as optimization region, and by the substructure of the initial configuration model Bridge
It is defined as unoptimizable region；
Correspondingly, described that topological optimization is carried out to the initial configuration model, comprising: to retain the institute being located at immediately below load impacting
Substructure is stated, and removes the material in the superstructure.
4. according to the method described in claim 3, it is characterized in that, after the S3, further includes:
If judgement knows that the optimal structure model is unsatisfactory for optimization design target, the optimization region and/or described is modified
Constraint condition simultaneously repeats S2 and S3, until the optimal structure model meets the optimization design target.
If 5. the method according to claim 1, wherein the judgement to know that the optimal structure model meets excellent
Change design object, then using the optimal structure model as the structural model of the bridge, comprising:
Static construction analysis is carried out to the initial configuration model and the optimal structure model respectively, obtains the initial configuration
The rigidity and quality of model and the optimal structure model；
Compare the rigidity and quality of the initial configuration model and the optimal structure model, if comparison result meets the optimization
Design object, then using the optimal structure model as the structural model of the bridge.
6. according to the method described in claim 2, it is characterized in that, the boundary condition packet for defining the initial configuration model
It includes:
It is fixed constraint by the restrained boundary conditional definition of two supports in the initial configuration model, and constrains the support
In the freedom degree of translation direction.
7. the method according to claim 1, wherein the objective function are as follows:
The constraint condition are as follows:
In formula, C (X) is malformation energy, and U is malformation total displacement matrix, and K is structure global stiffness matrix, and N is division unit
Sum, ueFor element displacement vector, k0For element stiffness, VjFor the volume that vary during topological structure optimization,For bridge
Initial configuration model volume, F be structure suffered by uniform load, xjFor the relative density of bridge.
8. a kind of bridge structure design looks for type device characterized by comprising
Module is established, carries out static construction analysis for establishing the initial configuration model of bridge, and to the initial configuration model；
Optimization module, for being analyzed based on static construction as a result, being using volume reduction as constraint condition and with maximum rigidity
Objective function carries out topological optimization to the initial configuration model, obtains optimal structure model；
Judgment module, if for judging to know that the optimal structure model meets optimization design target, by the optimization structure
Structural model of the model as the bridge.
9. a kind of electronic equipment including memory, processor and stores the calculating that can be run on a memory and on a processor
Machine program, which is characterized in that the processor realizes bridge as described in any one of claim 1 to 7 when executing described program
The step of type method is looked in structure design.
10. a kind of non-transient computer readable storage medium, is stored thereon with computer program, which is characterized in that the computer
The step of bridge structure design as described in any one of claim 1 to 7 looks for type method is realized when program is executed by processor.
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