CN109948264A - A kind of rich chromium cast iron erosion analogy method and calculate realization system - Google Patents
A kind of rich chromium cast iron erosion analogy method and calculate realization system Download PDFInfo
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Abstract
The present invention relates to a kind of rich chromium cast iron erosion analogy method and calculate realization system, the analogy method carries out erosion simulation to analyze footwork to rich chromium cast iron more, each analysis step simulates the erosion process of multiple groups particle using the erosion repeatedly of same group of particle, the following steps are included: creation target plate threedimensional model and particle three-dimensional model, and material model and failure model information are loaded, the rich chromium cast iron plate to erosion is simulated with the target plate threedimensional model；Multiple particle entities are produced using rectangular array based on the particle three-dimensional model；An analysis step is created, analysis step parameter is set；Grid dividing is carried out to the target plate threedimensional model and particle three-dimensional model；It is random to obtain eroded spot coordinate, erosion simulation is carried out, the stress distribution cloud atlas that granule impact target plate generates is obtained；Based on the target plate threedimensional model after last erosion simulation, multiple erosion analog result is obtained.Compared with prior art, the present invention has many advantages, such as to improve computational efficiency, saves the time.
Description
Technical field
The present invention relates to computer aided technique fields, more particularly, to a kind of rich chromium cast iron erosion analogy method and calculating
Realization system.
Background technique
Abrasion is one of the principal mode of machine components failure, and abrasive wear accordingly accounts for the 50% of material abrasion.It is grinding
In grinding abrasion, low stress erosive wear accounts for certain proportion again, and low stress erosive wear is widely present in modern industrial production,
Such as abrasion in mine, power plant slurry pump flow passage components and pipeline and valve.These vulnerable parts are not only born during the work time
The erosion and shear action of solids, and still suffer from the corrosiveness of liquid medium or the effect of high temperature, building ring
Border is extremely severe, reduces the service life of these wearing pieces.Therefore, it is necessary to investigate the Erosive Properties of material, extend easily
Damage the service life of part, it is necessary to carry out the research of erosive wear.
Research of the numerical simulation calculation in material erosion field makes great progress in recent years, because it calculates accurate, height
The advantages of effect environmental protection, save the cost, is constantly applied deeper research field.Explicit software pair is used at present
The affecting laws that the research of material erosive wear problem focuses mostly in particle habit, material property and external condition to abrasion, and
And the material studied is mostly the lesser material of hardness, erosion speed takes the larger value more, this and the operating condition in actual production process
Speed difference.Computer disposal energy is locked into for the research of the erosive wear problem of high hardness wear-resisting material under the low speed
Power and be difficult to make progress.
Summary of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of rich chromium cast iron erosions
Analogy method and calculating realization system.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of rich chromium cast iron erosion analogy method, this method carry out erosion simulation to analyze footwork to rich chromium cast iron more, respectively
Analysis step simulates the erosion process of multiple groups particle using the erosion repeatedly of same group of particle.
Further, method includes the following steps:
1) target plate threedimensional model and particle three-dimensional model are created, and loads material model and failure model information, with described
Target plate threedimensional model simulates the rich chromium cast iron plate to erosion；
2) multiple particle entities are produced using rectangular array based on the particle three-dimensional model；
3) analysis step is created, analysis step parameter is set, selecting impingement area and particle surface is principal and subordinate face；
4) grid dividing is carried out to the target plate threedimensional model and particle three-dimensional model；
5) eroded spot coordinate is obtained at random, carries out erosion simulation, obtains the stress distribution that granule impact target plate generates
Cloud atlas；
6) based on the target plate threedimensional model after last erosion simulation, step 3) -5 is repeated), obtain multiple erosion mould
Quasi- result.
Further, the particle three-dimensional model is spheric granules threedimensional model.
Further, the analysis step parameter includes analysis step step-length, field output parameter, historical output parameter, phase interaction
With parameter and the boundary condition of target plate and particle.
It further, include: that mesh refinement is carried out to target plate effective collision region in the step 4).
Further, it in the step 6), repeats to be greater than 15 step 3) -5).
A kind of calculating realization system for rich chromium cast iron erosion simulation, comprising:
Model creation module for creating target plate threedimensional model and particle three-dimensional model, and loads material model and failure
Model information simulates the rich chromium cast iron plate to erosion with the target plate threedimensional model；
Particle entities produce module, real for producing multiple particles using rectangular array based on the particle three-dimensional model
Body；
Analysis step setup module, for setting analysis step parameter；
Grid dividing module, for carrying out grid dividing to the target plate threedimensional model and particle three-dimensional model；
Erosion analog module for obtaining eroded spot coordinate at random, and calls analysis step setup module and grid dividing mould
Block carries out erosion simulation, and the target plate threedimensional model after being simulated with erosion is updated storage into model creation module；
The erosion analog module carries out multiple erosion simulation according to the different eroded spot coordinates obtained at random.
Further, the particle three-dimensional model is spheric granules threedimensional model.
Further, the analysis step parameter includes analysis step step-length, field output parameter, historical output parameter, phase interaction
With parameter and the boundary condition of target plate and particle.
Further, in the grid dividing module, mesh refinement is carried out to target plate effective collision region.
Compared with prior art, the present invention creatively solves numerical value by using more analysis step data transfer means
Analog study wear-resistant material erosion wear problem under low velocity impact state, have with following the utility model has the advantages that
(1) traditional analog method is disposably to establish multiple groups erosion particle, includes thousands of particles up to a hundred, leads to each step all
It needs to carry out equation of motion solution to thousands of a particles up to a hundred, considerably increases operation time and operation cost；And the present invention is logical
Excessive analysis step calculates means, and the erosion process of multiple groups particle is simulated using the erosion repeatedly of single group particle, is reduced to meter
The requirement of calculation machine calculated performance, substantially increases computational efficiency, has saved the plenty of time, reduce research cost；
(2) present invention determines the mistake of peening particle number at the directly entire erosive wear process of decoupled method, the initial stage of eliminating
Journey simplifies research process；
(3) the material failure model parameter in the present invention comes from document experiment data, and parameter accuracy is high；
(4) present invention has studied rich chromium cast iron low speed erosive wear problem, grinds for the erosion numerical simulation of wear-resisting class material
Study carefully and provides a kind of new research means.
Detailed description of the invention
Fig. 1 is flow diagram of the invention；
Fig. 2 is stress distribution cloud atlas after first analysis step impact in embodiment；
Fig. 3 is the predefined field setting figure of second analysis step in embodiment；
Fig. 4 is stress distribution cloud atlas after second analysis step impact in embodiment；
Fig. 5 is stress distribution cloud atlas after third analysis step impact in embodiment；
Fig. 6 is stress distribution cloud atlas after the 17th analysis step impact in embodiment.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.The present embodiment is with technical solution of the present invention
Premised on implemented, the detailed implementation method and specific operation process are given, but protection scope of the present invention is not limited to
Following embodiments.
The present invention provides a kind of rich chromium cast iron erosion analogy method, and this method rushes rich chromium cast iron with analyzing footwork more
Erosion simulation, each analysis step simulate the erosion process of multiple groups particle using the erosion repeatedly of same group of particle.As shown in Figure 1, the party
Method the following steps are included:
1) target plate threedimensional model and particle three-dimensional model are created, and loads material model and failure model information, with described
Target plate threedimensional model simulates the rich chromium cast iron plate to erosion, and the particle three-dimensional model is spheric granules threedimensional model；
2) multiple particle entities are produced using rectangular array based on the particle three-dimensional model；
3) analysis step is created, analysis step parameter is set, selecting impingement area and particle surface is principal and subordinate face, the analysis step
Parameter includes the perimeter strip of analysis step step-length, field output parameter, historical output parameter, interaction parameter and target plate and particle
Part；
4) grid dividing is carried out to the target plate threedimensional model and particle three-dimensional model, including to target plate effective collision region
Carry out mesh refinement；
5) eroded spot coordinate is obtained at random, carries out erosion simulation, obtains the stress distribution that granule impact target plate generates
Cloud atlas；
6) based on the target plate threedimensional model after last erosion simulation, repeat to be greater than 15 step 3) -5), it obtains more
Secondary erosion analog result.
Above-mentioned rich chromium cast iron erosion simulation can calculate realization system by one, which realizes that system includes:
Model creation module for creating target plate threedimensional model and particle three-dimensional model, and loads material model and failure
Model information simulates the rich chromium cast iron plate to erosion with the target plate threedimensional model；
Particle entities produce module, real for producing multiple particles using rectangular array based on the particle three-dimensional model
Body；
Analysis step setup module, for setting analysis step parameter；
Grid dividing module, for carrying out grid dividing to the target plate threedimensional model and particle three-dimensional model；
Erosion analog module for obtaining eroded spot coordinate at random, and calls analysis step setup module and grid dividing mould
Block carries out erosion simulation, and the target plate threedimensional model after being simulated with erosion is updated storage into model creation module；
The erosion analog module carries out multiple erosion simulation according to the different eroded spot coordinates obtained at random, and each
Time mark point is set when starting.
Embodiment
The present embodiment is based on ABAQUS and realizes above-mentioned analogy method.
Step 1: first analysis step calculating process, the specific steps are as follows:
Step 1-1: pre-processing module ABAQUS/CAE creation target plate and spheric granules threedimensional model, target in ABAQUS are utilized
Board size is 2mm × 2mm × 0.3mm, and spherical particle size is diameter 0.12mm, and particle and target plate spacing are 0.02mm, is generated
Two part (component) models；
Step 1-2: definition material types of models and failure model type in property (attribute) module, material model
Johnson-cook model is selected, the related coefficient in mechanical parameters and Johnson-cook model, failure model are inserted
Cumulative failure model is chosen, failure parameter is defined；By the material model created and failure model Assign (distribution) to two
Part (component) model generates two section (section)；
Step 1-3: assembly in Assembly (assembly) module is imported in two part (component) models and generates two
Instances (entity) reuses rectangular array and produces multiple spheric granules, and inputs random eroded spot coordinate；
Step 1-4: being Dynamic (dynamics), the analysis step of explicit (explicit) in Step module creation type
Step-1 defines time analysis a length of 8E-7s step by step；To Field output (field output) and History output (history
Output) it is defined, interval (interval) is respectively set to 20,200, and setting is " raw in Field output (field output)
Dead grid ", the grid more than setting value will be removed, and in Restart request (restarting requirement) to Step-1 into
The setting of row overlay (covering) and time mark (markers)；
Step 1-5: being first defined as rigid body for particle in Interaction (interaction) module, definition
The Friction of Tangential Behavior (tangential motion) in Interaction property (interaction attribute)
Coefficient (coefficient of friction) value is the pressure-overclouce of 0.1, Normal Behavior (forward motion)
(pressure overload) is hard contact (hard contact)；New Interaction (interaction) is created, general is defined as
Contact (explicit) (general contact is explicit) type, contact domain (ground protection system) select selected
Surface pairs (has selected surface pair), and selecting impingement area and particle surface is principal and subordinate face；
Step 1-6: being configured the boundary condition of target plate and particle in Load (load) module, creates one first
The boundary (boundary) of target plate, the boundary condition of target plate are set as four and are hinged at fixation, target plate surrounding is defined as
Pinned (hinge) constraint creates a boundary (boundary) to all solids particle, applies UR1 constraint；Create particle
Predefined field (pre- field) and to define in velocity (speed) U3 value be 40；
Step 1-7: carrying out grid dividing to target plate and particle in Mesh (grid) module, considers impact material hair
The shape that changes and contact surface penetrate, and need to carry out mesh refinement to target plate effective collision region, using global fabric means,
Grid cell size is defined, explicit 8 node of 3D stress hexahedron reduction integral unit (C3D8R) is selected, can effectively improve
Calculating speed and control hourglass；
Step 1-8: creating an operation in Job module, be named as restart-1, generate a .INP file, submits
Operation carries out simulation calculating；
Step 1-9: it can check that granule impact target plate generates after the completion of calculating in Visualization (visualization) module
Stress distribution cloud atlas, as shown in Figure 2；
Step 2: second analysis step calculating process, the specific steps are as follows:
Step 2-1: it replicates above-mentioned Model (model) and renames；To Model attribute (model attributes) into
Edlin definition,
The operation created in step 1-8 is filled in Read data from job (reading the data from work)
Step-1 is filled in restart-1, step name, and is chosen Restart from the end of step and (restarted from step
Terminate)；
Step 2-2: from the model of .odb suffix produced in selection part steps for importing 1-8 in import (input), choosing
It selects target plate model and is named as the identical title of target plate part model in step 1-1, select (the rewriting portion overwrite part
Part)；
Step 2-3: it repeats step 1-2 and generates new section (component) to target plate assign (distribution), and in step 1-
3 reset the random eroded spot coordinate value of particle；
Step 2-4: increasing new analysis step step-2 in step 1-4, and define its Field output (field output) with
History output (history output)；
Step 2-5: resetting the boundary (boundary) of target plate in step 1-6, is arranged consistent with step 1-6；Increase
Add new predefined field (pre- field), select initial state (original state), Job name fills in step 1-8
In job title restart-1, and choose update reference configuration (update related configuration), such as scheme
Shown in 3；
Step 2-6: creating the operation of a restart type in Job module, is named as restart-2, generates one
A .INP file submits operation, carries out simulation calculating；
Step 2-7: it can check that second analysis step calculates after the completion of calculating in Visualization (visualization) module
Later the stress distribution cloud atlas that granule impact target plate generates, as shown in Figure 3；
Step 3: third analysis step calculating process, the specific steps are as follows:
Step 3-1: it replicates above-mentioned Model (model) and renames；To Model attribute (model attributes) into
Edlin definition,
The operation created in step 2-6 is filled in Read data from job (read and come from operational data)
Step-2 is filled in restart-2, step name, and is chosen Restart from the end of step and (restarted from step
Terminate)；
Step 3-2: from the mould of .odb suffix produced in selection part (component) steps for importing 2-6 in import (input)
Type selects target plate model and is named as the identical title of target plate part model in step 1-1, selects overwrite part (weight
Write parts)；
Step 3-3: it repeats step 1-2 and generates new section (component) to target plate assign (distribution), and in step 1-
3 reset the random eroded spot coordinate value of particle；
Step 3-4: increasing new analysis step step-2 in step 1-4, and define its Field output (field output) with
History output (history output)；
Step 3-5: resetting the boundary (boundary) of target plate in step 1-6, is arranged consistent with step 1-6；Increase
Add new predefined field (pre- field), initial stat (original state) e, Job name is selected to fill in step 2-6
In job title restart-2, and choose update reference configuration (update related configuration), such as scheme
Shown in 4；
Step 3-6: creating the operation of a restart type in Job module, is named as restart-3, generates one
A .INP file submits operation, carries out simulation calculating；
Step 3-7: it can check that third analysis step calculates after the completion of calculating in Visualization (visualization) module
Later the stress distribution cloud atlas that granule impact target plate generates, as shown in Figure 5；
Step 4: repeating the above steps, the number of repetition of the present embodiment is 17 times altogether, then obtains the 17th analysis step meter
The stress distribution cloud atlas that granule impact target plate after calculation generates, as shown in Figure 6.
Statistics calculates the time, and compared with Traditional calculating methods, as a result such as table 1, greatly reduces and calculates the time.
Table 1
| Types of models | Calculating group number | Calculate the time |
| More analysis step models | 17 groups | 8877.4s |
| Non- more analysis step models | 17 groups | 74602.1s |
The preferred embodiment of the present invention has been described in detail above.It should be appreciated that those skilled in the art without
It needs creative work according to the present invention can conceive and makes many modifications and variations.Therefore, all technologies in the art
Personnel are available by logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's idea
Technical solution, all should be within the scope of protection determined by the claims.
Claims (10)
1. a kind of rich chromium cast iron erosion analogy method, which is characterized in that this method rushes rich chromium cast iron with analyzing footwork more
Erosion simulation, each analysis step simulate the erosion process of multiple groups particle using the erosion repeatedly of same group of particle.
2. rich chromium cast iron erosion analogy method according to claim 1, which comprises the following steps:
1) target plate threedimensional model and particle three-dimensional model are created, and loads material model and failure model information, with the target plate
Threedimensional model simulates the rich chromium cast iron plate to erosion；
2) multiple particle entities are produced using rectangular array based on the particle three-dimensional model；
3) analysis step is created, analysis step parameter is set, selecting impingement area and particle surface is principal and subordinate face；
4) grid dividing is carried out to the target plate threedimensional model and particle three-dimensional model；
5) eroded spot coordinate is obtained at random, carries out erosion simulation, obtains the stress distribution cloud atlas that granule impact target plate generates；
6) based on the target plate threedimensional model after last erosion simulation, step 3) -5 is repeated), obtain multiple erosion simulation knot
Fruit.
3. rich chromium cast iron erosion analogy method according to claim 2, which is characterized in that the particle three-dimensional model is ball
Shape particle three-dimensional model.
4. rich chromium cast iron erosion analogy method according to claim 2, which is characterized in that the analysis step parameter includes point
Analyse the boundary condition of length, field output parameter, historical output parameter, interaction parameter and target plate and particle step by step.
5. rich chromium cast iron erosion analogy method according to claim 2, which is characterized in that include: pair in the step 4)
Target plate effective collision region carries out mesh refinement.
6. rich chromium cast iron erosion analogy method according to claim 2, which is characterized in that in the step 6), repeat big
In 15 step 3) -5).
7. system is realized in a kind of calculating for rich chromium cast iron erosion simulation characterized by comprising
Model creation module for creating target plate threedimensional model and particle three-dimensional model, and loads material model and failure model
Information simulates the rich chromium cast iron plate to erosion with the target plate threedimensional model；
Particle entities produce module, for producing multiple particle entities using rectangular array based on the particle three-dimensional model；
Analysis step setup module, for setting analysis step parameter；
Grid dividing module, for carrying out grid dividing to the target plate threedimensional model and particle three-dimensional model；
Erosion analog module, at random obtain eroded spot coordinate, and call analysis step setup module and grid dividing module into
Row erosion simulation, and the target plate threedimensional model after being simulated with erosion is updated storage into model creation module；
The erosion analog module carries out multiple erosion simulation according to the different eroded spot coordinates obtained at random.
8. system is realized in the calculating according to claim 7 for rich chromium cast iron erosion simulation, which is characterized in that described
Grain threedimensional model is spheric granules threedimensional model.
9. system is realized in the calculating according to claim 7 for rich chromium cast iron erosion simulation, which is characterized in that described point
Analysis step parameter includes the side of analysis step step-length, field output parameter, historical output parameter, interaction parameter and target plate and particle
Boundary's condition.
10. system is realized in the calculating according to claim 7 for rich chromium cast iron erosion simulation, which is characterized in that described
In grid dividing module, mesh refinement is carried out to target plate effective collision region.
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