CN107748822A - A kind of ballasting method in engine accessory power rating simulation analysis - Google Patents
A kind of ballasting method in engine accessory power rating simulation analysis Download PDFInfo
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- CN107748822A CN107748822A CN201711042053.XA CN201711042053A CN107748822A CN 107748822 A CN107748822 A CN 107748822A CN 201711042053 A CN201711042053 A CN 201711042053A CN 107748822 A CN107748822 A CN 107748822A
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- 238000004458 analytical method Methods 0.000 title claims abstract description 28
- 238000004088 simulation Methods 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 10
- 239000007787 solid Substances 0.000 claims description 7
- 235000013399 edible fruits Nutrition 0.000 claims description 3
- 238000012545 processing Methods 0.000 abstract description 2
- 238000011161 development Methods 0.000 description 5
- 230000006870 function Effects 0.000 description 3
- 238000011068 loading method Methods 0.000 description 2
- 230000008450 motivation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000010219 correlation analysis Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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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]
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/15—Vehicle, aircraft or watercraft design
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
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Abstract
The present invention provides the ballasting method in a kind of engine accessory power rating simulation analysis, comprises the following steps：Model simplification processing, the division of 2D and 3D grids, grid model cutting, the material properties for assigning grid reality, computation model barycenter simultaneously contrast with actual product barycenter and the material properties of imparting are modified according to comparing result, finally reach the purpose that both barycenter overlap, quality is equal.
Description
Technical field
The invention belongs to automobile engine Finite Element Simulation Analysis field, and in particular to a kind of engine accessory power rating simulation analysis
In ballasting method.
Background technology
At present, the selling market dog-eat-dog of automobile, in order to shorten the automobile R＆D cycle, new automotive type is enable more
The market share is seized in fast listing, be each automobile main frame maker the survival and development it is basic.Under this overall situation, automobile hair
During the early development of motivation, it is often necessary to simulation analysis are carried out in the case where piece attachments not can determine that internal structure,
To shorten the R＆D cycle.
The quality loading method of annex has two kinds in traditional engine model analysis：First method is reservation annex
External structural characteristics, its whole inner space is filled using solid element, and assign these solid elements minimum density category
Property, then establish quality point and by all realities of rigid element quality of connection point and annex in the centroid position of its actual exemplar
Body unit.But because the solid element of whole annex is all connected by rigid element with barycenter so that the local stiffness of this annex
Excessive, distortion so that its local vibration shape can not embody, and the method is only applicable to be not concerned with the engine of this annex local mode
Complete machine mode；Second method is the grid model for the entire infrastructure for establishing engine accessory power rating, and assigns the real property of material
To carry out simulation analysis, but using during the method, it is necessary to establish whole models of engine accessory power rating, such as in compressor of air conditioner
Blade and generator in rotor etc., not only in modeling it is time-consuming it is permanent also need to simultaneously it is true early stage in automobile engine exploitation
Determine the internal structure of annex.But some annexes belong to Purchased Item, its internal structure belongs to black box sub-portion for complete system plant
Part, it is impossible to obtain the digital-to-analogue of its concrete structure, be not suitable in project development work rapidly and efficiently.
The content of the invention
In view of the shortcomings of the prior art, it is an object of the invention to provide match somebody with somebody double recipe in a kind of engine accessory power rating simulation analysis
Method, on the premise of ensureing that computational solution precision is higher, the pre-treatment work of correlation analysis item is fast and efficiently completed, for hair
The Design and optimization work of motivation Related product is serviced.
The present invention concrete technical scheme be：A kind of ballasting method in engine accessory power rating simulation analysis, including following step
Suddenly：
Step 1: establishing engine assembly model, remove entity, the scope of freedom and repeat face, and to needing to carry out cutting in model,
Only retain the external structural characteristics of annex；
Step 2: the shell of annex with 3D solid elements complete divide, using the geometric center of annex as the origin of coordinates, establish XY,
Tri- coordinate planes of YZ, XZ carry out cutting to it, annex are divided into 8 parts, and assign original density, elasticity to every part
The material properties such as modulus, Poisson's ratio；
Step 3: the barycenter of whole model is obtained by the summary function calculatings under POST modules in Hypermesh softwares,
Debugged for the density attributes of various pieces, calculate the centroid position of digital-to-analogue after adjustment again, obtained debugging knot
Fruit needs to meet that the barycenter of digital-to-analogue overlaps with the centroid position of reality, and to cause digital-to-analogue total quality to be equal to the reality of exemplar
Quality；
Step 4: meeting requirements above and then carrying out the simulation analysis of next step, various pieces intrinsic frequency and mould are obtained
The state vibration shape.
Described simulation analysis are model analyses.
This modeling method effectively accurately simulates the quality and rigidity of accessories section, to carry out engine mode point
Analysis provides accurate, simple accessory structure.
The beneficial effects of the invention are as follows：1. computational accuracy is high, the error calculated obtained with traditional second method
Within 10%；2. it is simple to operate, by itself barycenter of check and correction model that can be quickly after model cutting and its actual barycenter position
Put；3. efficiency high, it is no longer necessary to handle accessory internal structure, and avoid corresponding contact surface and contact pair.
Brief description of the drawings
Fig. 1 is the flow chart of engine accessory power rating counterweight of the present invention.
Embodiment
The present invention is further described for explanation and embodiment below in conjunction with the accompanying drawings.
A kind of ballasting method in engine accessory power rating simulation analysis, comprises the following steps：
Step 1: establishing engine assembly model, remove entity, the scope of freedom and repeat face, and to needing to carry out cutting in model,
Only retain the external structural characteristics of annex；
Step 2: the shell of annex with 3D solid elements complete divide, using the geometric center of annex as the origin of coordinates, establish XY,
Tri- coordinate planes of YZ, XZ carry out cutting to it, annex are divided into 8 parts, and assign original density, elasticity to every part
The material properties such as modulus, Poisson's ratio；
Step 3: the barycenter of whole model is obtained by the summary function calculatings under POST modules in Hypermesh softwares,
Debugged for the density attributes of various pieces, calculate the centroid position of digital-to-analogue after adjustment again, obtained debugging knot
Fruit needs to meet that the barycenter of digital-to-analogue overlaps with the centroid position of reality, and to cause digital-to-analogue total quality to be equal to the reality of exemplar
Quality；
Step 4: meeting requirements above and then carrying out the simulation analysis of next step, various pieces intrinsic frequency and mould are obtained
The state vibration shape.
Described simulation analysis are model analyses.
As shown in figure 1, the present invention provides a kind of loading of automobile engine annex quality in accurately and efficiently model analysis
Method, mainly include the following steps that：Model simplification processing, the division of 2D and 3D grids, grid model cutting, imparting grid are actual
Material properties, computation model barycenter and with actual product barycenter contrast and the material properties of imparting are entered according to comparing result
Row modification, finally reaches the purpose that both barycenter overlap, quality is equal.
In modeling process, there is no the model that internal structure only grasps external shell structure for some, to its external shell
Body structure is divided using 3D solid grid, after logarithmic mode carries out mesh generation, using the geometric center of digital-to-analogue as origin,
Establish tri- coordinate planes of XY, YZ, XZ and cutting is carried out to it, digital-to-analogue is cut into 8 parts, and every part is assigned original
The material properties such as density, modulus of elasticity, Poisson's ratio.
The barycenter of whole model is obtained by the summary function calculatings under POST modules in Hypermesh softwares, and will
The result measured and the centroid position of actual annex are contrasted, due to providing digital-to-analogue and the imperfect barycenter for causing to be calculated
Position can have certain difference with the exemplar centroid position of reality, now need the material properties of logarithmic mode to be debugged, main
If being debugged for the density attributes of various pieces, the centroid position of digital-to-analogue is calculated after adjustment again, the tune finally obtained
Test result needs to meet that the barycenter of digital-to-analogue overlaps with the centroid position of reality, and to cause digital-to-analogue total quality to be equal to exemplar
Actual mass.The model quality that so obtains, rigidity are relatively true.After requirements above is met, the imitative of next step is being carried out
True analysis particularly model analysis, can obtain relatively more accurate intrinsic frequency and Mode Shape.
The present invention carries out cutting and the again method of counterweight by logarithmic mode, applies the emulation in engine early development
In analysis particularly model analysis, the eigenfrequncies and vibration models of automobile engine annex can quickly, be accurately and efficiently obtained,
Have during the engine research, development of next step and important know meaning.
Claims (2)
1. the ballasting method in a kind of engine accessory power rating simulation analysis, it is characterised in that comprise the following steps：
Step 1: establishing engine assembly model, remove entity, the scope of freedom and repeat face, and to needing to carry out cutting in model,
Only retain the external structural characteristics of annex；
Step 2: the shell of annex with 3D solid elements complete divide, using the geometric center of annex as the origin of coordinates, establish XY,
Tri- coordinate planes of YZ, XZ carry out cutting to it, annex are divided into 8 parts, and assign original density, elasticity to every part
The material properties such as modulus, Poisson's ratio；
Step 3: the barycenter of whole model is obtained by the summary function calculatings under POST modules in Hypermesh softwares,
Debugged for the density attributes of various pieces, calculate the centroid position of digital-to-analogue after adjustment again, obtained debugging knot
Fruit needs to meet that the barycenter of digital-to-analogue overlaps with the centroid position of reality, and to cause digital-to-analogue total quality to be equal to the reality of exemplar
Quality；
Step 4: meeting requirements above and then carrying out the simulation analysis of next step, various pieces intrinsic frequency and mould are obtained
The state vibration shape.
2. the ballasting method in a kind of engine accessory power rating simulation analysis according to claim 1, it is characterised in that：Described
Simulation analysis are model analyses.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711042053.XA CN107748822B (en) | 2017-10-31 | 2017-10-31 | Counter weight method in simulation analysis of engine accessories |
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| CN201711042053.XA CN107748822B (en) | 2017-10-31 | 2017-10-31 | Counter weight method in simulation analysis of engine accessories |
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| CN107748822A true CN107748822A (en) | 2018-03-02 |
| CN107748822B CN107748822B (en) | 2023-10-31 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109409021A (en) * | 2018-12-18 | 2019-03-01 | 安徽江淮汽车集团股份有限公司 | A kind of bolt connection in engine simulation analysis |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101630338A (en) * | 2009-02-18 | 2010-01-20 | 上海理工大学 | Simulation method for analyzing dynamic mechanical properties of large crankshaft lathe |
| CN102799729A (en) * | 2012-07-13 | 2012-11-28 | 北京航空航天大学 | Effective method for quickly eliminating residual stress of heterogeneous component |
| US20140358500A1 (en) * | 2013-03-14 | 2014-12-04 | United Technologies Corporation | Probalistic High Cycle Fatigue (HCF) Design Optimization Process |
| WO2016169249A1 (en) * | 2015-04-21 | 2016-10-27 | 中车青岛四方机车车辆股份有限公司 | Pre-processing template and processing method for simulation model of high speed driving vehicle |
-
2017
- 2017-10-31 CN CN201711042053.XA patent/CN107748822B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101630338A (en) * | 2009-02-18 | 2010-01-20 | 上海理工大学 | Simulation method for analyzing dynamic mechanical properties of large crankshaft lathe |
| CN102799729A (en) * | 2012-07-13 | 2012-11-28 | 北京航空航天大学 | Effective method for quickly eliminating residual stress of heterogeneous component |
| US20140358500A1 (en) * | 2013-03-14 | 2014-12-04 | United Technologies Corporation | Probalistic High Cycle Fatigue (HCF) Design Optimization Process |
| WO2016169249A1 (en) * | 2015-04-21 | 2016-10-27 | 中车青岛四方机车车辆股份有限公司 | Pre-processing template and processing method for simulation model of high speed driving vehicle |
Non-Patent Citations (2)
| Title |
|---|
| 余烽;徐中明;张志飞;史方圆;汪先国;: "全地形车车体结构动态特性有限元建模", 机械设计与研究, no. 06 * |
| 杨芸芸;: "发动机悬置支架模态分析", 建筑机械, no. 01 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109409021A (en) * | 2018-12-18 | 2019-03-01 | 安徽江淮汽车集团股份有限公司 | A kind of bolt connection in engine simulation analysis |
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| CN107748822B (en) | 2023-10-31 |
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