CN106372288A - Pre-processing module for development and automatic interaction analysis of aerial hydraulic pipelines - Google Patents
Pre-processing module for development and automatic interaction analysis of aerial hydraulic pipelines Download PDFInfo
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- CN106372288A CN106372288A CN201610744403.6A CN201610744403A CN106372288A CN 106372288 A CN106372288 A CN 106372288A CN 201610744403 A CN201610744403 A CN 201610744403A CN 106372288 A CN106372288 A CN 106372288A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
- G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
Abstract
The invention discloses a pre-processing module for development and automatic interaction analysis of aerial hydraulic pipelines. The pre-processing module is used for realizing the following steps of: automatically establishing a material database; automatically establishing an attribute database; automatically converting entity pipeline geometry into surface pipeline geometry; automatically carrying out geometric filing on the tips of the pipelines; automatically carrying out material attribute assignment distribution on the pipelines with different diameters; automatically capturing connection center point of hoops and the pipelines ; and automatically establishing connection relationship between the hoops and the pipelines. According to the pre-processing module disclosed by the invention, the influences, on the stress characteristics of the aerial hydraulic pipelines, of different combined working conditions are considered; an effect of avoiding repeated modeling is realized by means of a method for carrying out secondary development on the pre-processing module of finite element analysis under the premise of satisfying the aerial design conditions and material intensity requirements; and through changing input files under appointed path folders, automatic pre-processing and computation can be realized, and finite element calculation processes of calculation results ca be obtained. Through the pre-processing module, the time of the engineers can be greatly saved and the manual mis-input can be voided.
Description
Technical field
The present invention relates to ipc classification g06f electricity Digital data processing technology, especially hydraulic air pipeline exploitation friendship automatically
Mutually analysis pre-processing module.
Background technology
Hydraulic air pipeline is in the vibration environment of complexity, is susceptible to resonate, serious will lead to conduit failure, shadow
Ring flight safety.Pump discharge energy resource system circuit design was all by rule of thumb in the past, and with randomness, the dynamic stress of fluid pressure line is only
System design can be arrived terminate, record after true iron bird testing stand is tested, if dynamic stress is exceeded, then change sets again
Meter, verification experimental verification, lead to system development cycle to lengthen.This hydraulic plumbing system is divided into inlet line, return line and pressuring oil pipe
Road three part.Every pipeline, is made up of flexible pipe, hard tube, pipe joint, clip and bearing.Wherein force feed pipeline is to be easiest to occur
The pipeline destroying, at one section of hard tube on force feed pipeline, the corner of pipeline, at the bolt on clip, is all the emphasis of analysis
Position.
Hydraulic air circuit design typically requires and carries out by finite element analyses, and for example, abaqus is exactly many engineers
Common tool.
Abaqus is the finite element software of a set of powerful engineering simulation, and the scope of its solve problem is from relatively easy
Linear analysiss to complicated huge nonlinear problem.Abaqus includes an abundant, list that is can simulating random geometry
First storehouse.And have various types of material model storehouses, the performance of typical project material can be simulated, including metal, rubber,
Macromolecular material, composite, armored concrete, compressible super-elasticity foamed materialss and the geological materials such as soil and rock,
As general simulation tool, abaqus, except solving the problems, such as a large amount of stress/displacement structures, can also simulate Other Engineering neck
Many problems in domain, such as conduction of heat, mass diffusion, crack preventing, acoustic analysis, rock-soil mechanics fluid permeability/stress
Coupling analysis and piezoelectric dielectric analysis.
Abaqus has two main solver modules abaqus/standard and abaqus/explicit.Abaqus also wraps
Support the graphic user interface of solver, i.e. processing module abaqus/cae before and after man-machine interaction containing one comprehensively.abaqus
Some specific questions are additionally provided special module to solve.
Abaqus is broadly considered function finite element software the strongest, can analyze the Solid Mechanics structural capacity of complexity
System, particularly can control the very problem of bulky complex and simulated altitude nonlinear problem.Abaqus not only can do
The mechanics of single component and the analysis of multiple physical field, can also do system-level analysis simultaneously and study.Abaqus's is system-level
The feature of analysis is unique for other analysis softwares.Due to the outstanding analysis ability of abaqus and simulation
The reliability of complication system makes abaqus widely adopt by the industry of various countries with studying.Abaqus product is substantial amounts of
Huge effect is all played in high-tech product research.
China Machine Press 2011-8-1, isbn:9787111351559, Cao Jinfeng, Wang Xuchun, Kong Liang write
" application in abaqus for the python language ", in translation help file based on provide preferable reference.
Technical staff's research finds mono- attribute of abaqus query, and after query in cae interface, these things occur in
In message area, with other instruments, this attribute is read, or directly with direct handle after python order query
Query result saves output in certain file.Obtain the mass property of an assembly, in abaqus
The function that middle use python realizes is more feasible, you can carry out the function of submitting multiple job to.Object: jobobject.Use:
Start to write import job in source file, source program is with mdb.jobs [name]；Using the job object for name for the name.
Python, fortran, c++ are suitable for the secondary development for abaqus, for python, as accompanying drawing 1 institute
Show, therefore do such as the pre-treatments such as parametric modeling, and as all very convenient in post processings such as data extractions.Additionally, according to analysis,
Fortran is write with fortran as the classical works language of relatively early stage, slightly before epoch a lot of algorithm, is used for doing more
Some such as subprograms such as concrete material constitutive relation, and c++ is generally used to do post processing more typically.
Just as described above, visualization procedure secondary development to be realized in abaqus, need to use python.
Conventional abaqus secondary development mode has two kinds:
(1) directly change inp file, this mode needs substantial amounts of node in inp file and unit are operated, one
As it is not recommended that secondary development is carried out using inp file, unless there are special keyword or identifier, keyword can also be used in fact
Python language is carrying out secondary development.Secondary development data volume is carried out greatly using inp file, line number is many, once there is problem
It is difficult to detect error reason；
(2) adopt abaqus language, self-editing script, simply easily, be especially suitable for abecedarian.
Secondary development based on abaqus language is more like the vba in word or excel, as long as passing through to record one section of grand literary composition
Part it is possible to simply rapidly complete the foundation of a model, when modifying to this section of macro document it is possible to complete to this mould
The modification of type, is especially suitable for the foundation of same or like model in a large number, prevents user's modelling operability loaded down with trivial details again and again.
Simple step is as follows:
1. first open file--macro manager before modeling, then a newly-built macro document, now can eject
Recordmacro dialog box；
2. carry out normal cae modeling；
3. execution operates the stop mecording of record macro dialog box, and now command bar can show " macro "
Macroname " has been added to " e: temp macroname.py " ", prerequisite task completes；
4. now open this py file with text editor, in py file, some words are otiose, " def
Macro1...import connectorbehavior " can delete, and often the space before row word will remove；
5. replicate newly-generated python file, and the parameter in this document is modified, submit to abaqus--
Cae just can complete to repeat to model, so can infinitely repeat it is seen that python language advantage easy to use it should be pointed out that:
1. in conjunction with other programming languages such as vb, vc cooperation modification parameter and py file can be generated, using more flexible；
2. generate py file and directly can select file-run script in cae, select the python file generating；
3. cae model file can be directly generated with python file, can finally add " mdb.saveas in py file
(pathname=' " * * * " ') "；
4. an abaqus kernel directly to can be submitted py file by cmd order, allow abaqus enter row operation, cmd orders
Make for " shell " and c: windows syswow64 cmd.exe/k abaqus cae nogui=" * * * * " .py ", vbhide；
Wait py language " myjob.submit (consistencychecking=off, the atacheckjob=of abaqus computing
true)".
In a word, python is a kind of object-oriented the programming language with dynamic semantics feature, is abaqus software
Standard design language.Its main body frame is made up of python, can write the script foot of suitable demand using python language
This program.Abaqus script interface is the customized development carrying out on the basis of python language, its grammer and operation with
Python language is identical.And abaqus script interface is extended on the basis of python language again.For example, open
Send out the kernel modules such as part, property, assembly, increased 500 numerous types of data etc..Therefore, abaqus script
The object model of interface will be huger and complicated.The shell script write by python.Can directly and abaqus kernel
Carry out communication to complete various operations.Command stream is initially entered python interpreter after running and is connected with abaqus/cae kernel,
Could run after passing through through the compiling of abaqus/cae kernel.The shell script write using python, user can realize automatically
Change Repetitive work, carry out parameter study, establishment and modification model and model database, access the functions such as result database.
Studied based on above, more valuable may is that, carries out pre-treatment using python Programming with Pascal Language to abaqus
Secondary development, it is possible to achieve hydraulic air circuit design optimize.
Xian Airplane Design Institute of Aviation Industry Corporation of China is in Chinese patent application 201310034279.0
A kind of fluid pressure line dynamic stress simulation analysis system and method are disclosed.The invention discloses a kind of fluid pressure line dynamic stress emulation point
Analysis system and method.The method and system are capable of the dynamic response under the mode and working environment of analysis of pipeline system, prediction system
The eigenfrequncies and vibration models of system, obtain bulk deformation and the stress of structure, check rigidity and the intensity at structural key position.And
Eventually under unified software platform, realize the parametric modeling of pipeline, automatically analyze and the weight analysis after structural modification, auxiliary is real
The vibration suppression of existing structure.
Before, engineer is to carry out finite element analyses work by graphic user interface (gui) window, for example, clicks
After ok or apply button in dialog box, gui will automatically generate a script command, ability after python interpreter
Proceed to execution in abaqus/cae.Enter into the order in abaqus/cae and be converted into inp file, then through abaqus/
Standard Implicit Method device or abaqus/explicit display solver are analyzed, and finally obtain output database (odb)
File.Engineer carries out a pipe-line system analysis, needs up to ten thousand execution operation mouse data inputs.
Content of the invention
It is an object of the invention to provide a kind of hydraulic air pipeline exploitation automatic interaction analysis pre-processing module, meet aviation
Design condition and the strength of materials require, and the impact of the research stress characteristics to hydraulic air pipeline for the various combination operating mode, to set up
Secondary development forms the pre-processing module of finite element analyses, it is to avoid repeats to model, is directed to using python language pair
Abaqus pre-treatment carries out secondary development, before the input file only passing through to change under specified path file just can be realized automatically
Process, calculate, and obtain the FEM calculation process of result of calculation.
The purpose of the present invention will be realized by following technical measures: realizes in pre-processing module: automatically set up material number
According to storehouse, automatically set up attribute database, automatically by entity pipeline geometrical inversion be facial canal road geometry, automatically pipe termination is carried out
Geometry is filled up, and automatically carries out material properties assignment distribution to different tube diameters pipe, automatically catches clip and is connected central point with pipe,
Automatically set up the annexation between clip and pipe.
Especially, using finite element analysis software abaqus with based on python secondary development interactive program aircraft
Hydraulic system analysis automation solution (ahsaas), the abaqus bis- times based on python
Exploitation interactive program aircraft hydraulic system analysis automation solution (ahsaas), complete
Become the secondary development of hydraulic air pipeline pre-treatment；Specific implementation step is analyzed as follows described:
(1) consider, in the presence of pressure loading, the impact of equivalent pressure load in three way cock's connecting line, can be produced,
Finite element simplification is carried out to the two ends of pipelines all in system；The sequence number of pipeline geometry is extracted, makes coplanar geometric data
Point generates data surface；
(2) the data refer point required for finite element analyses is set up at yoke segment center；Extract clip model circle number
According to line, generate data point；Finite element reference mode is set up on this data point；
(3) consider the pipeline of hydraulic system different materials different wall different-diameter, need the material to pipe-line system
Material attribute carries out parametrization input；Read the geometric data line segment information of pipeline geometry, classification catches round line segment information, output
Diameter or radius data information, are contrasted with standard pipeline information, and whether inspection pipeline diameter is correct with wall thickness information；With
Shi Jianli material depot and attribute library information, set up the pipeline attribute of different-diameter different materials；
(4) in view of the pipe characteristic of aviation pipeline hydraulic system, in system, thin wall pipelines are the pipeline composition needing.And
The diameter of pipe is smaller value compared with tube length, so being analyzed using shell unit in finite element analyses, Ke Yi great
The big saving calculating time, it is by conventional cell type in analytical calculation；But enter the pipeline in finite element analyses flow process
Model is the geometric data of entity, and finite element analyses need physical model is carried out with the extraction of face geometry；Implement process
For digital independent being carried out to the pipe geometry of hydraulic plumbing system, concluding point, line, surface, body information, find out point, line, surface, body letter
Relation between the modeling sequence number of breath.Sum up inner surface of tube/outer surface surface information data needs, to remaining geometric data
Deleted, thus obtaining face geometry；
(5) reference point reference points is that application abaqus is carried out in finite element analyses through a commonly used class number
Strong point, the application of reference point in hydraulic plumbing system analysis is even more inevitable；The common method for building up of reference point is manual
The coordinate figure in three directions of input node, or execute the vertices point on operation solid with mouse.Interacted by setting up
Window, user provides the keyword needing the part setting up reference point, and Automatic Program is realized reference point and set up；Specific implementation process
For: read keyword message, travel through all component names and matched, when pairing completes, read all the match is successful parts
Internal data point information, and set up reference point in respective counts strong point position, so that subsequent analysis use；
(6) hydraulic system clip geometric detail is more, if all clips are carried out finite element modeling, then model volume is huge
Greatly, calculate cost larger, calculate through simulation, simulate the relation between clip and pipe using the connected mode of multi-point constraint.
Specific implementation process is: after (2) and (5) step, automatically builds between the reference point having built up and pipe between
Vertical multi-point constraint；Initially set up the spheroid in a space, automatically set up multi-point constraint between spheroid overlay area and pipe.
Especially, after starting abaqus finite element software, menu bar selects plug-ins it is seen that ahsaas
(aircraft hydraulic system analysis automation solution), left side is functional realiey area, bag
Include edgecover, getdatuminclamp, sectionbuilder, trimsolid2shell, findrf,
Tubecouplinggnerator part, right side is corresponding help document；
In the interactive interface of pretreatment process, after starting abaqus finite element software, in menu bar, select plug-ins,
Ahsaas (the aircraft hydraulic system analysis automation shown in figure can be seen
Solution), left side be functional realiey area, including edgecover, getdatuminclamp, sectionbuilder,
Trimsolid2shell, findrf, tubecouplinggnerator part, right side is corresponding help document.Below with regard to it
Association content and the function of being completed；
Ahsaas (aircraft hydraulic system analysis automation solution) user circle
Face, after execution operation sectionbuilder, establishes attribute library, ahsaas- according to different pipeline diameters
Sectionbuilder, only for aluminium, sets up 0.25 inch of diameter, 0.375 inch of diameter, until diameter 1.5inch
Pipe sequence of attributes；
Execution operation trimsolid2shell after, entity pipeline portions geometry be deleted, only retain the inner surface specified or
Person's outer surface；
After execution operation edgecover, the end of pipe is filled up；Automatically establish the sealing surface of original shape.
After execution operation getdatuminclamp, the position automatically passing through in clip circular central pipeline establishes data
Point.After execution operation findrf, interactive window can be ejected first, after have input the geometry name keys of clip, automatically exist
Reference point is established on all clips.
After execution operation tubecouplinggenerator, automatically establish mpc multiple spot between reference point and pipe about
Bundle, further, point is opened constraint manager and can be viewed set up link information.
Advantages of the present invention and effect: take into account the impact of the stress characteristics to hydraulic air pipeline for the various combination operating mode,
Meet under the premise of aerospace designs condition and the strength of materials require, by including using python language, abaqus pre-treatment being carried out
Secondary development, in interior method, realizes the effect avoiding repeating to model, you can by changing the input under specified path file
File just can realize automatic pre-treatment, calculating, and obtains the FEM calculation process of result of calculation.Work can greatly be saved
The time of Cheng Shi, and avoid artificial mistake input.
Brief description
Fig. 1 is the correspondence of abaqus script interface and abaqus/cae.
Fig. 2 is the interactive interface schematic diagram of pretreatment process in the embodiment of the present invention 1, i.e. user interface.
Fig. 3 is to establish attribute library according to different pipeline diameters in the embodiment of the present invention 1.
Fig. 4 is that in the embodiment of the present invention 1, entity pipeline portions geometry is deleted only retains the inner surface specified or appearance
Face schematic diagram.
Fig. 5 is in the embodiment of the present invention 1, the end of pipe to be carried out filling up the sealing surface schematic diagram automatically establishing original shape.
Fig. 6 is that data point schematic diagram is set up in the position automatically passing through in clip circular central pipeline in the embodiment of the present invention 1.
Fig. 7 is automatic foundation ginseng on all clips after the geometry name keys inputting clip in the embodiment of the present invention 1
Examination point schematic diagram.
Fig. 8 is automatically to establish mpc multi-point constraint between reference point and pipe in the embodiment of the present invention 1, and point is opened
Constraint manager can view set up link information schematic diagram.
Fig. 9 is pre-processing module annexation of the present invention and analytical procedure schematic diagram
Specific embodiment
The principle of the invention is, realizes: automatically set up material database, automatically set up attribute data in terms of front process
Entity pipeline geometrical inversion is facial canal road geometry, automatically carries out geometry to pipe termination and fill up, automatically to different pipes by storehouse automatically
Footpath pipe carries out material properties assignment distribution, automatically catches clip and is connected central point with pipe, automatically set up clip and pipe it
Between annexation.
Due to the versatility of finite element analysis software abaqus, the present invention attempts by obtaining reality based on abaqus method
A kind of convenient way of the existing present invention.
The present invention utilizes finite element analysis software abaqus and is based on python secondary development interactive program aircraft
Hydraulic system analysis automation solution (ahsaas), completes hydraulic air pipeline pre-treatment
Secondary development；Realize in terms of front process: automatically set up material database, automatically set up attribute database, automatically by entity
Pipeline geometrical inversion is facial canal road geometry, automatically carries out geometry to pipe termination and fills up, automatically carries out material to different tube diameters pipe
Material attribute assignment distribution, is automatically caught clip and is connected central point with pipe, automatically set up the annexation between clip and pipe.
The invention will be further described with reference to the accompanying drawings and examples.
Embodiment 1: so that the pipe-line system of aviation hydraulic system wing section is analyzed as a example, as shown in Figure 1, abaqus foot
The institute that this interface can be realized in abaqus/cae is functional.If inputted by script file, can greatly save
The time of engineer, and avoid artificial mistake input.
It is analyzed as follows described using the specific implementation step that python language carries out pre-treatment secondary development to abaqus:
(1) egdecover: consider, in the presence of pressure loading, equivalent pressure can be produced in three way cock's connecting line
The two ends of pipelines all in system are carried out finite element simplification by the impact of load；The sequence number of pipeline geometry is extracted, makes same
Face geometric data point generates data surface.
(2) getdatuminclamp: set up the data refer point required for finite element analyses at yoke segment center；Carry
Card taking hoop model circular data line, generates data point；Finite element reference mode is set up on this data point.
(3) sectionbuilder: consider the pipeline of hydraulic system different materials different wall different-diameter, need
Parametrization input is carried out to the material properties of pipe-line system.Read the geometric data line segment information of pipeline geometry, classification catches circle
Molded line segment information, output diameter or radius data information, are contrasted with standard pipeline information, check pipeline diameter and wall thickness
Whether information is correct.Set up material depot and attribute library information simultaneously, set up the pipeline attribute of different-diameter different materials.
(4) trimsolid2shell: in view of the pipe characteristic of aviation pipeline hydraulic system, in system, thin wall pipelines are to need
The pipeline composition wanted.And the diameter of pipe is smaller value compared with tube length, so adopting shell list in finite element analyses
Unit is analyzed, and can greatly save the calculating time, is by conventional cell type in analytical calculation.But entrance finite element
Pipeline model in analysis process is the geometric data of entity, and finite element analyses need to carry out face geometry to physical model to carry
Take.The process of implementing is to carry out digital independent to the pipe geometry of hydraulic plumbing system, conclude point, line, surface, body information, look for
Go out the relation between the modeling sequence number of point, line, surface, body information.Sum up inner surface of tube/outer surface surface information data needs,
Remaining geometric data is deleted, thus obtaining face geometry.
(5) findrf: reference point (reference points) is that application abaqus is carried out in finite element analyses through conventional
The class data point arriving, the application of reference point in hydraulic plumbing system analysis is even more inevitable.The common foundation of reference point
Method is to be manually entered the coordinate figure in three directions of node, or executes the vertices point on operation solid with mouse.Logical
Cross and set up interactive window, user provides the keyword needing the part setting up reference point, Automatic Program is realized reference point and set up.Tool
Body implementation process is: reads keyword message, travels through all component names and matched, when pairing completes, reads all
It is made into the data point information of work(components interior, and sets up reference point in respective counts strong point position, so that subsequent analysis use.
(6) tubecouplinggenerator: hydraulic system clip geometric detail is more, if all clips are had
Limit Meta Model, then model is bulky, calculates cost larger, through simulation calculating, using the connected mode mould of multi-point constraint
Intend the relation between clip and pipe.Specific implementation process is: after (2) and (5) step, in the reference having built up
Automatically multi-point constraint is set up and pipe between point.Initially set up the spheroid in a space, in spheroid overlay area and pipe
Between automatically set up multi-point constraint.
In aforementioned, as shown in Fig. 2 being the interactive interface of pretreatment process, after starting abaqus finite element software, in menu
In hurdle select plug-ins it can be seen that way shown in ahsaas (aircraft hydraulic system analysis
Automation solution), left side be functional realiey area, including edgecover, getdatuminclamp,
The several part of sectionbuilder, trimsolid2shell, findrf, tubecouplinggnerator.Right side is for corresponding to
Help document.Below content and the function of being completed are associated with regard to it, be illustrated.
Ahsaas (aircraft hydraulic system analysis automation solution) user circle
Face, associates content and the function of being completed, after execution operation sectionbuilder, sets up according to different pipeline diameters with regard to it
Attribute library, as shown in Figure 3, only for aluminium, establishes 0.25 inch of diameter, 0.375 inch of diameter, until diameter
The pipe sequence of attributes of 1.5inch.
In aforementioned, as shown in Figure 4, after execution operation trimsolid2shell, entity pipeline portions geometry is deleted,
Only retain the inner surface specified or outer surface.
In aforementioned, as shown in Figure 5, after execution operation edgecover, the end of pipe is filled up.Automatically set up
The sealing surface of original shape.
In aforementioned, as shown in Figure 6, after execution operation getdatuminclamp, automatically wear in clip circular central pipeline
The position crossed establishes data point.After execution operation findrf, interactive window can be ejected first, have input the geometry name of clip
After claiming keyword, automatically on all clips, establish reference point.
In aforementioned, as shown in Figure 7, after execution operation tubecouplinggenerator, automatically in reference point and pipe
Between establish mpc multi-point constraint, further, as shown in Figure 8, point is opened constraint manager and can be viewed institute
The link information set up.
Use and ensure that method excess syndrome should be readily appreciated that and reappears as previously mentioned for convenience, the present embodiment provides part source generation
Code is as follows:
In the present invention, for the feature of aviation pipeline Hydraulic system analysis complexity, assess the stress behavior of pipe-line system,
It is to ensure that designing quality and pipe-line system are paid to provide complete technical support.By to process before and after abaqus software into
Row secondary development, writes shell script using python language, during allowing users to aviation pipeline Hydraulic system analysis
Realize automation mechanized operation, in processing in front and back during solving pipe-line system analysis, complicated repetitive operation, extends
The application of abaqus software.Practical, improve analysis efficiency more than 30%, friendly interface, easy to operate, boundary after packaging
Face carries out executing operation, you can realize the most of pre-treatment work to pipe-line system.Achieve material depot automatically set up, attribute
The complexity such as storehouse is set up automatically, face geometry automatically generates, clip key point automatically generates, pipe and clamp connection relation are set up automatically
With crucial pretreatment process.Greatly simplifie the finite element analyses process of pipe-line system.Also be in aircraft other system or
Application in other industrial technical field of person provides guidance and uses for reference.
In the present invention, take into account the impact of the stress characteristics to hydraulic air pipeline for the various combination operating mode, set meeting aviation
Under the premise of meter condition and the strength of materials require, by including carrying out secondary development using python language to abaqus pre-treatment existing
Interior method, it is to avoid repeat to model, you can before just being realized automatically by the input file under change specified path file
Process, calculate, and obtain the FEM calculation process of result of calculation.
Claims (3)
1. hydraulic air pipeline exploitation automatic interaction analysis pre-processing module is it is characterised in that realize in pre-processing module: automatically
Set up material database, automatically set up attribute database, automatically by entity pipeline geometrical inversion be facial canal road geometry, automatically to pipe
Sub- termination carries out geometry and fills up, and automatically carries out material properties assignment distribution to different tube diameters pipe, automatically catches clip and pipe
Connect central point, automatically set up the annexation between clip and pipe.
2. hydraulic air pipeline exploitation automatic interaction analysis pre-processing module as claimed in claim 1 is it is characterised in that utilize
Finite element analysis software abaqus and be based on python secondary development interactive program aircraft hydraulic system
Analysis automation solution (ahsaas), completes the secondary development of hydraulic air pipeline pre-treatment；Specifically real
Apply step be analyzed as follows described:
(1) consider, in the presence of pressure loading, the impact of equivalent pressure load can be produced in three way cock's connecting line, to being
In system, the two ends of all pipelines carry out finite element simplification；The sequence number of pipeline geometry is extracted, so that coplanar geometric data line is given birth to
Become data surface；
(2) the data refer point required for finite element analyses is set up at yoke segment center；Extract clip model circular data line,
Generate data point；Finite element reference mode is set up on this data point；
(3) consider the pipeline of hydraulic system different materials different wall different-diameter, need the material to pipe-line system to belong to
Property carries out parametrization input；Read the geometric data line segment information of pipeline geometry, classification catches round line segment information, exports diameter
Or radius data information, is contrasted with standard pipeline information, whether inspection pipeline diameter is correct with wall thickness information；Build simultaneously
Vertical material depot and attribute library information, set up the pipeline attribute of different-diameter different materials；
(4) in view of the pipe characteristic of aviation pipeline hydraulic system, in system, thin wall pipelines are the pipeline composition needing.And pipe
Diameter be smaller value compared with tube length, so being analyzed using shell unit in finite element analyses, can significantly save
Save the calculating time, be by conventional cell type in analytical calculation；But enter the pipeline model in finite element analyses flow process
It is the geometric data of entity, and finite element analyses need physical model is carried out with the extraction of face geometry；The process of implementing is, right
The pipe geometry of hydraulic plumbing system carries out digital independent, conclude point, line, surface, body information, finds out point, line, surface, body information
Relation between modeling sequence number；Sum up inner surface of tube/outer surface surface information data, remaining geometric data is deleted
Remove, thus obtaining face geometry；
(5) reference point reference points is that application abaqus is carried out in finite element analyses through a commonly used class data
Point, the application of reference point in hydraulic plumbing system analysis is even more inevitable；The common method for building up of reference point is defeated manually
The coordinate figure in three directions of ingress, or execute the vertices point on operation solid with mouse.By setting up interaction window
Mouthful, user provides the keyword needing the part setting up reference point, and Automatic Program is realized reference point and set up；Specific implementation process
For: read keyword message, travel through all component names and matched, when pairing completes, read all the match is successful parts
Internal data point information, and set up reference point in respective counts strong point position, so that subsequent analysis use；
(6) hydraulic system clip geometric detail is more, if all clips are carried out finite element modeling, then model is bulky,
Calculate cost larger, calculate through simulation, simulate the relation between clip and pipe using the connected mode of multi-point constraint；Specifically
Implementation process is: after (2) and (5) step, automatically sets up many between the reference point having built up and pipe between
Point constraint；Initially set up the spheroid in a space, automatically set up multi-point constraint between spheroid overlay area and pipe.
3. hydraulic air pipeline exploitation automatic interaction analysis pre-processing module as claimed in claim 1 is it is characterised in that start
After abaqus finite element software, menu bar selects plug-ins it is seen that ahsaas is aircraft hydraulic
System analysis automation solution, left side be functional realiey area, including edgecover,
Getdatuminclamp, sectionbuilder, trimsolid2shell, findrf, tubecouplinggnerator portion
Point, right side is corresponding help document；
In the interactive interface of pretreatment process, after starting abaqus finite element software, menu bar selects plug-ins, permissible
See the ahsaas shown in figure, i.e. aircraft hydraulic system analysis automation
Solution, left side be functional realiey area, including edgecover, getdatuminclamp, sectionbuilder,
Trimsolid2shell, findrf, tubecouplinggnerator part, right side is corresponding help document；
In ahsaas (aircraft hydraulic system analysis automation solution) user interface,
After execution operation sectionbuilder, establish attribute library, ahsaas- according to different pipeline diameters
Sectionbuilder, only for aluminium, sets up 0.25 inch of diameter, 0.375 inch of diameter, until diameter 1.5inch
Pipe sequence of attributes；
Execution operation trimsolid2shell after, entity duct portion split geometry be deleted, only retain the inner surface specified or
Outer surface；
After execution operation edgecover, the end of pipe is filled up；Automatically establish the sealing surface of original shape；
After execution operation getdatuminclamp, the position automatically passing through in clip circular central pipeline establishes data point；Hold
After row operation findrf, interactive window can be ejected first, after have input the geometry name keys of clip, automatically in all cards
Reference point is established on hoop；
After execution operation tubecouplinggenerator, automatically establish mpc multi-point constraint between reference point and pipe,
Further, point is opened constraint manager and can be viewed set up link information.
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| CN107679341A (en) * | 2017-10-30 | 2018-02-09 | 南京理工大学 | A kind of barrel configuration parametric Finite Element Modeling Method |
| CN109614747A (en) * | 2018-12-28 | 2019-04-12 | 西北工业大学 | Layout of beam line design method in high aspect ratio wing |
| CN110348141A (en) * | 2019-07-15 | 2019-10-18 | 东北大学 | A kind of method of aero-engine external pipeline system fast vibration analysis |
| CN114112176A (en) * | 2021-11-10 | 2022-03-01 | 中国航发沈阳发动机研究所 | External pipeline design method for connecting surge differential pressure or pressure sensor |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107679341A (en) * | 2017-10-30 | 2018-02-09 | 南京理工大学 | A kind of barrel configuration parametric Finite Element Modeling Method |
| CN107679341B (en) * | 2017-10-30 | 2021-03-02 | 南京理工大学 | Finite element parametric modeling method for barrel structure |
| CN109614747A (en) * | 2018-12-28 | 2019-04-12 | 西北工业大学 | Layout of beam line design method in high aspect ratio wing |
| CN110348141A (en) * | 2019-07-15 | 2019-10-18 | 东北大学 | A kind of method of aero-engine external pipeline system fast vibration analysis |
| CN110348141B (en) * | 2019-07-15 | 2022-12-23 | 东北大学 | Method for rapidly analyzing vibration of external pipeline system of aero-engine |
| CN114112176A (en) * | 2021-11-10 | 2022-03-01 | 中国航发沈阳发动机研究所 | External pipeline design method for connecting surge differential pressure or pressure sensor |
| CN114112176B (en) * | 2021-11-10 | 2023-09-22 | 中国航发沈阳发动机研究所 | Design method of external pipeline connected with surge pressure difference or pressure sensor |
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