CN104408267A - Finite element modeling method for special-shaped spatial structure - Google Patents
Finite element modeling method for special-shaped spatial structure Download PDFInfo
- Publication number
- CN104408267A CN104408267A CN201410787995.0A CN201410787995A CN104408267A CN 104408267 A CN104408267 A CN 104408267A CN 201410787995 A CN201410787995 A CN 201410787995A CN 104408267 A CN104408267 A CN 104408267A
- Authority
- CN
- China
- Prior art keywords
- finite element
- model
- write
- unit
- layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Processing Or Creating Images (AREA)
Abstract
The invention discloses a finite element modeling method for a special-shaped spatial structure. A finite element model comprises nodes, units, load and boundary conditions, wherein the units are divided into line units, surface units and entity units. The finite element modeling method is characterized by comprising the following steps: a space geometric model is picked up in CAD (computer aided design) software, a finite element graphic read-in method is adopted with combination of a graphic component management method, pre-processing data of a finite element computational model are rapidly output, and cross section rotating angles are assigned in a batch manner according to a space free-form surface. According to the method, a finite element structural analysis model can be established rapidly, the model is accurate and reliable, a structure checking model is rapidly provided for design change, and human resources are saved.
Description
Technical field
The invention belongs to the structural model data conversion technique field in Civil Engineering Design industry, be specifically related to one spacial special-shaped structure finite element modeling method fast; Various graphic designs in main application Civil Engineering Design, to finite element structure data transformations, are specially adapted to large scale special-shaped structural design Modeling Calculation, include science of bridge building and public works.
Background technology
Design configuration data transformations is that technology is widely used in civil engineering structure design, and its major function is the finite element data model that can be used for calculating by the graphics of computing machine.But the current most of information of model data transformation technology is incomplete, efficiency is lower, has difficulties for large-scale engineering drawing data management.
Summary of the invention
In order to solve above-mentioned technical matters, the invention provides a kind of spacial special-shaped structure finite element modeling method.
The technical solution adopted in the present invention is: a kind of spacial special-shaped structure finite element modeling method, includes node, unit, load, boundary condition in described finite element model, wherein unit is divided into line unit, face unit and solid element; It is characterized in that: by pickup model space geometric in CAD software, finite element figure is used to read in way in conjunction with figure component management way, export the pre-processing data of limited element calculation model fast, bar cross section corner is specified, fast creation finite element analysis model according to Space Free-Form Surface batch.
As preferably, described graphics component management method comprises the following steps:
Steps A 1: structural drawing layer data tissue; Structure layer mainly in order to distinguish the work layer of structure discipline in civil Engineering Design, sets up two-stage subgraph layer under this layer, first order subgraph layer is structure function, for specification configuration function or region; Second level subgraph layer is used for storage organization component model information;
Steps A 2: layer is named; The title of layer mainly contains functional title, element type title, element structure information encoding and information segmentation symbol, combination name form is " Chinese name-unit classification-material number-cross section numbering ", wherein " Chinese name, unit classification, material number and cross section numbering " is finite element special key words, and "-" is specific separator.
As preferably, described finite element figure reads in way and comprises the following steps:
Step B1: enable file and write;
Step B2: choose derivation object;
Step B3: choose single body circular treatment successively, and judge geometric type:
Does is if curve, then continuing to judge whether straight line? if straight line, then write rod member module, extract geological information, extract graphic layer structure information and writing bar cell command stream; If not directly, then the record that reports an error is write;
If curved surface, then continue to judge whether to be low order curved surface? if low order curved surface, then write the warped surface unit in 4 not coplanar faces, extract geological information, extract graphic layer structure information, writing surface cell command stream; If not low order curved surface, then the record that reports an error is write;
If grid, then write 4 coplanar plane face unit, extract geological information, extract graphic layer structure information and writing surface cell command stream;
If point, then write load and boundary condition;
Otherwise the record that reports an error is write;
Step B4: circulation terminates;
Step B5: terminate write file;
Step B6: misprint is reported.
As preferably, described Space Free-Form Surface is the space arbitrary surface based on NURBS, and the position, arbitrfary point of curved surface all can calculate Surface Method phase direction.
As preferably, described specifies bar cross section corner according to Space Free-Form Surface batch, and its specific implementation comprises the following steps:
Step C1: obtain rod member line; Obtain corresponding starting point, terminal and mid point;
For the starting point obtained and terminal, whether it is perpendicular to world coordinates axle XY plane to judge its line: if so, then 2 direction of principal axis are y-axis, and 3 direction of principal axis are x-axis; If not, then 2 direction of principal axis are that 1 yoke takes advantage of z-axis, and 3 direction of principal axis are that 2 yokes take advantage of 1 axle; Then the angle calculation face of 1 axle, 2 axles, 3 axles is obtained respectively; Wherein, in the middle of finite element model, 1 axle, 2 axles, 3 axles are local coordinate axles of unit, for bar unit: 1 axle is that the starting point of bar unit points to the direction of terminal, 2 axles be 1 axle in world coordinates axle Z axis vector cross product, 3 axles are that 1 axle is in the cross product of 2 axles;
For obtain mid point, obtain curved surface closest approach, and obtain closest approach Surface Method to;
Step C2: according to angle calculation face and the Surface Method angle to the face of calculating and normal direction;
Step C3: write angle record.
Relative to prior art, beneficial effect of the present invention is: by pickup model space geometric in CAD software, finite element figure is used to read in way in conjunction with figure component management way, export the pre-processing data of limited element calculation model fast, specify bar cross section corner according to Space Free-Form Surface batch, the special-shaped finite element structural analysis model of fast creation, model is precisely reliable, for design alteration provides structural checking computation model fast, save human resources.
Accompanying drawing explanation
Fig. 1: the sectional twisting angle adjustment process flow diagram of the embodiment of the present invention;
Fig. 2: the line of the embodiment of the present invention, face model of element schematic diagram;
Fig. 3: the line of the embodiment of the present invention, the Data of Finite Element Model structural drawing of face model of element;
Fig. 4: the model schematic of the line unit of the embodiment of the present invention;
Fig. 5: the model schematic of the face unit of the embodiment of the present invention;
Fig. 6: the model schematic of the grid of the embodiment of the present invention;
Fig. 7: the space geometric from model schematic of the embodiment of the present invention;
Fig. 8: the Data of Finite Element Model structural drawing of the space geometry body Model of the embodiment of the present invention;
Fig. 9: the curved surface of the embodiment of the present invention and rod member angle model schematic;
Embodiment
Understand for the ease of those of ordinary skill in the art and implement the present invention, below in conjunction with drawings and Examples, the present invention is described in further detail, should be appreciated that exemplifying embodiment described herein is only for instruction and explanation of the present invention, is not intended to limit the present invention.
The present invention, in computer aided drawing software (Computer Aided Design), uses the graphics component management method of operator oneself accumulation, finite element data read-in programme method can fast creation finite element analysis model.This program can specify bar cross section corner according to Space Free-Form Surface batch.
The technical scheme that this enforcement adopts is: a kind of spacial special-shaped structure finite element modeling method, includes node, unit, load, boundary condition in finite element model, wherein unit is divided into line unit, face unit and solid element; By pickup model space geometric in CAD software, finite element figure is used to read in way in conjunction with figure component management way, export the pre-processing data of limited element calculation model fast, specify bar cross section corner, fast creation finite element analysis model according to Space Free-Form Surface batch.
Wherein graphics component management method comprises the following steps:
Steps A 1: structural drawing layer data tissue; Structure layer mainly in order to distinguish the work layer of structure discipline in civil Engineering Design, sets up two-stage subgraph layer under this layer, first order subgraph layer is structure function, for specification configuration function or region; Second level subgraph layer is used for storage organization component model information;
Steps A 2: layer is named; The title of layer mainly contains functional title, element type title, element structure information encoding and information segmentation symbol, combination name form is " Chinese name-unit classification-material number-cross section numbering ", wherein " Chinese name, unit classification, material number and cross section numbering " is finite element special key words, and "-" is specific separator.
Wherein finite element figure reads in way and comprises the following steps:
Step B1: enable file and write;
Step B2: choose derivation object;
Step B3: choose single body circular treatment successively, and judge geometric type:
Does is if curve, then continuing to judge whether straight line? if straight line, then write rod member module, extract geological information, extract graphic layer structure information and writing bar cell command stream; If not directly, then the record that reports an error is write;
If curved surface, then continue to judge whether to be low order curved surface? if low order curved surface, then write the warped surface unit in 4 not coplanar faces, extract geological information, extract graphic layer structure information, writing surface cell command stream; If not low order curved surface, then the record that reports an error is write;
If grid, then write 4 coplanar plane face unit, extract geological information, extract graphic layer structure information and writing surface cell command stream;
If point, then write load and boundary condition;
Otherwise the record that reports an error is write;
Step B4: circulation terminates;
Step B5: terminate write file;
Step B6: misprint is reported.
Wherein Space Free-Form Surface is the space arbitrary surface based on NURBS, and the position, arbitrfary point of curved surface all can calculate Surface Method phase direction; Ask for an interview Fig. 1, specify bar cross section corner according to Space Free-Form Surface batch, its specific implementation comprises the following steps:
Step C1: obtain rod member line; Obtain corresponding starting point, terminal and mid point;
For the starting point obtained and terminal, whether it is perpendicular to world coordinates axle XY plane to judge its line: if so, then 2 direction of principal axis are y-axis, and 3 direction of principal axis are x-axis; If not, then 2 direction of principal axis are that 1 yoke takes advantage of z-axis, and 3 direction of principal axis are that 2 yokes take advantage of 1 axle; Then the angle calculation face of 1 axle, 2 axles, 3 axles is obtained respectively; Wherein, in the middle of finite element model, 1 axle, 2 axles, 3 axles are local coordinate axles of unit, for bar unit: 1 axle is that the starting point of bar unit points to the direction of terminal, 2 axles be 1 axle in world coordinates axle Z axis vector cross product, 3 axles are that 1 axle is in the cross product of 2 axles;
For obtain mid point, obtain curved surface closest approach, and obtain closest approach Surface Method to;
Step C2: according to angle calculation face and the Surface Method angle to the face of calculating and normal direction;
Step C3: write angle record.
Embodiment 1:
Asking for an interview Fig. 2, is line, face model of element schematic diagram; It is as follows that its modeling procedure comprises step:
(1) Classification Management layer is created:
The graphic layer structure of present case is:
Parent layer: " the simplest case "
One-level subgraph layer: " truss "
Secondary subgraph layer: " pricncipal rafter-BEAM-1-1 ",
" the stressed empty face-PLATE-4-4 of truss "
Layer illustrates: " pricncipal rafter ", " the stressed empty face of truss " are Chinese name, and "-" is specific separator, and " BEAM ", " PLATE " are finite element special key words.
Line unit in model corresponds to " pricncipal rafter-BEAM-1-1 " of secondary subgraph layer,
Face unit corresponds to " the stressed empty face-PLATE-4-4 of truss " of secondary subgraph layer.
(2) run finite element converse routine, asking for an interview Fig. 3, is the Data of Finite Element Model that program exports automatically fast.Its detailed process is: choose solid (line unit and face unit), input instruction unpack script Run Script show that suffix is the file of " .mgt ", and self-defined name (this routine called after 00001.mgt), open file and namely obtain the finite element data model of solid.Asking for an interview Fig. 4, is the model schematic of the line unit of the present embodiment; Asking for an interview Fig. 5, is the model schematic of the face unit of the present embodiment; Ask for an interview Fig. 6, be the model schematic of the grid of the present embodiment, its concrete object type and information ask for an interview table 1;
Table 1: the object type of line unit, face unit, grid and information
Embodiment 2:
Asking for an interview Fig. 7, is space geometric from model schematic; Its modeling procedure is as follows: pickup geometric model (897 curve), input instruction unpack script Run Script show that suffix is the file of " .mgt ", and self-defined name (this routine called after 00002.mgt), open file and namely obtain the finite element data model of solid, ask for an interview Fig. 8, the Data of Finite Element Model structural drawing of the space geometry body Model of the present embodiment;
Embodiment 3:
Asking for an interview Fig. 9, is curved surface and rod member angle model schematic; Its modeling procedure is as follows: Run Script, and successively choose curved surface and the first rod member 1 according to prompting, click is determined, eject subsequently and export text and dialog box, draw the X of the first rod member 1, Y-axis vector of unit length, click and run displaing coordinate plane subsequently, again click operation, terminate.Pick up the first rod member 1 and check attribute, in denominational, reading rod member and curved surface angle.
Second rod member 2, the 3rd rod member 3, the 4th rod member 4 step are the same.
The rod member of the present embodiment and curved surface relative position and angle, ask for an interview table 2:
Table 2: rod member and curved surface relative position and angle
| X-direction vector | Y direction vector | Angle | |
| First rod member 1 | (0,0,1) | (-1,0,0) | 77.5245921214769 |
| Second rod member 2 | (1,0,0) | (0,1,0) | -166.750967076848 |
| 3rd rod member 3 | (0,0,1) | (1,0,0) | -102.055374148508 |
| 4th rod member 4 | (1,0,0) | (0,1,0) | 170.155497472723 |
The object of this invention is to provide one engineering structure modeling technique flow process fast, this techniqueflow is upper the general at present CAD draw data of compatibility, original creation part of the present invention is to make draw data rapid translating be limited element calculation model by computer program, can specify bar cross section corner according to space curved surface normal direction batch, layer management way is specially adapted to large scale special-shaped Structural Engineering.This techniqueflow contains the layer management of complete set and naming method as draw data management system, and based on the data transformations interface routine of Rhinoceros 5SR4 graphical mapping software to the Midas groupware.
Computer aided drawing (Computer Aided Design) is this method scope of application, and computer aided design software known at present has Rhinoceros, AutoCAD, Blender all in protection domain; Other softwares not in known CAD software, as long as the CAD software being the use of the layer management way described in this method is all within protection domain.
Should be understood that, the part that this instructions does not elaborate all belongs to prior art.
Should be understood that; the above-mentioned description for preferred embodiment is comparatively detailed; therefore the restriction to scope of patent protection of the present invention can not be thought; those of ordinary skill in the art is under enlightenment of the present invention; do not departing under the ambit that the claims in the present invention protect; can also make and replacing or distortion, all fall within protection scope of the present invention, request protection domain of the present invention should be as the criterion with claims.
Claims (5)
1. a spacial special-shaped structure finite element modeling method, includes node, unit, load, boundary condition in described finite element model, and wherein unit is divided into line unit, face unit and solid element; It is characterized in that: by pickup model space geometric in CAD software, finite element figure is used to read in way in conjunction with figure component management way, export the pre-processing data of limited element calculation model fast, bar cross section corner is specified, fast creation finite element analysis model according to Space Free-Form Surface batch.
2. spacial special-shaped structure finite element modeling method according to claim 1, is characterized in that: described graphics component management method comprises the following steps:
Steps A 1: structural drawing layer data tissue; Structure layer mainly in order to distinguish the work layer of structure discipline in civil Engineering Design, sets up two-stage subgraph layer under this layer, first order subgraph layer is structure function, for specification configuration function or region; Second level subgraph layer is used for storage organization component model information;
Steps A 2: layer is named; The title of layer mainly contains functional title, element type title, element structure information encoding and information segmentation symbol, combination name form is " Chinese name-unit classification-material number-cross section numbering ", wherein " Chinese name, unit classification, material number and cross section numbering " is finite element special key words, and "-" is specific separator.
3. spacial special-shaped structure finite element modeling method according to claim 1, is characterized in that: described finite element figure reads in way and comprises the following steps:
Step B1: enable file and write;
Step B2: choose derivation object;
Step B3: choose single body circular treatment successively, and judge geometric type:
Does is if curve, then continuing to judge whether straight line? if straight line, then write rod member module, extract geological information, extract graphic layer structure information and writing bar cell command stream; If not directly, then the record that reports an error is write;
If curved surface, then continue to judge whether to be low order curved surface? if low order curved surface, then write the warped surface unit in 4 not coplanar faces, extract geological information, extract graphic layer structure information, writing surface cell command stream; If not low order curved surface, then the record that reports an error is write;
If grid, then write 4 coplanar plane face unit, extract geological information, extract graphic layer structure information and writing surface cell command stream;
If point, then write load and boundary condition;
Otherwise the record that reports an error is write;
Step B4: circulation terminates;
Step B5: terminate write file;
Step B6: misprint is reported.
4. spacial special-shaped structure finite element modeling method according to claim 1, is characterized in that: described Space Free-Form Surface, is the space arbitrary surface based on NURBS, and the position, arbitrfary point of curved surface all can calculate Surface Method phase direction.
5. the spacial special-shaped structure finite element modeling method according to claim 1,2,3 or 4, is characterized in that: described specifies bar cross section corner according to Space Free-Form Surface batch, and its specific implementation comprises the following steps:
Step C1: obtain rod member line; Obtain corresponding starting point, terminal and mid point;
For the starting point obtained and terminal, whether it is perpendicular to world coordinates axle XY plane to judge its line: if so, then 2 direction of principal axis are y-axis, and 3 direction of principal axis are x-axis; If not, then 2 direction of principal axis are that 1 yoke takes advantage of z-axis, and 3 direction of principal axis are that 2 yokes take advantage of 1 axle; Then the angle calculation face of 1 axle, 2 axles, 3 axles is obtained respectively; Wherein, in the middle of finite element model, 1 axle, 2 axles, 3 axles are local coordinate axles of unit, for bar unit: 1 axle is that the starting point of bar unit points to the direction of terminal, 2 axles be 1 axle in world coordinates axle Z axis vector cross product, 3 axles are that 1 axle is in the cross product of 2 axles;
For obtain mid point, obtain curved surface closest approach, and obtain closest approach Surface Method to;
Step C2: according to angle calculation face and the Surface Method angle to the face of calculating and normal direction;
Step C3: write angle record.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410787995.0A CN104408267A (en) | 2014-12-17 | 2014-12-17 | Finite element modeling method for special-shaped spatial structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410787995.0A CN104408267A (en) | 2014-12-17 | 2014-12-17 | Finite element modeling method for special-shaped spatial structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104408267A true CN104408267A (en) | 2015-03-11 |
Family
ID=52645898
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410787995.0A Pending CN104408267A (en) | 2014-12-17 | 2014-12-17 | Finite element modeling method for special-shaped spatial structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104408267A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105677965A (en) * | 2016-01-04 | 2016-06-15 | 北京航空航天大学 | Method for rapidly generating plate-type satellite-structure node merging grids |
| CN105701275A (en) * | 2016-01-04 | 2016-06-22 | 北京航空航天大学 | Method for rapidly generating beam plate composite satellite structure common node mesh |
| CN106599463A (en) * | 2016-12-14 | 2017-04-26 | 浙江精工钢结构集团有限公司 | Free-form surface-based parametric modeling method of space grid structure |
| CN109766661A (en) * | 2019-01-28 | 2019-05-17 | 中国矿业大学 | A kind of special-shaped thin wall building structure strengthening method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003091913A2 (en) * | 2002-04-26 | 2003-11-06 | Bae Systems Plc | Optimisation of the design of a component |
| JP2006011729A (en) * | 2004-06-24 | 2006-01-12 | Toshiba Corp | Design optimization support system and design optimization support method |
| JP2006221319A (en) * | 2005-02-09 | 2006-08-24 | Kanto Auto Works Ltd | Virtual prototyping device for molded part |
| CN102436530A (en) * | 2011-11-15 | 2012-05-02 | 东南大学 | Sensor distribution method for bowstring arc bridge structure made of special-shaped steel tube concrete |
| CN102819632A (en) * | 2012-07-26 | 2012-12-12 | 苏州工业园区设计研究院股份有限公司 | Method for modeling multi-scale finite element model of node of steel framework structure |
-
2014
- 2014-12-17 CN CN201410787995.0A patent/CN104408267A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003091913A2 (en) * | 2002-04-26 | 2003-11-06 | Bae Systems Plc | Optimisation of the design of a component |
| JP2006011729A (en) * | 2004-06-24 | 2006-01-12 | Toshiba Corp | Design optimization support system and design optimization support method |
| JP2006221319A (en) * | 2005-02-09 | 2006-08-24 | Kanto Auto Works Ltd | Virtual prototyping device for molded part |
| CN102436530A (en) * | 2011-11-15 | 2012-05-02 | 东南大学 | Sensor distribution method for bowstring arc bridge structure made of special-shaped steel tube concrete |
| CN102819632A (en) * | 2012-07-26 | 2012-12-12 | 苏州工业园区设计研究院股份有限公司 | Method for modeling multi-scale finite element model of node of steel framework structure |
Non-Patent Citations (3)
| Title |
|---|
| 夏淦 等: "异形板或类板结构实用计算方法的研究", 《东南大学学报》 * |
| 康琦: "桥梁CAD系统结构组成与程序设计", 《中国优秀硕士学位论文全文数据库（电子期刊）》 * |
| 黄鹤莅: "连续刚构有限元分析方法的研究与应用", 《铁道工程学报》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105677965A (en) * | 2016-01-04 | 2016-06-15 | 北京航空航天大学 | Method for rapidly generating plate-type satellite-structure node merging grids |
| CN105701275A (en) * | 2016-01-04 | 2016-06-22 | 北京航空航天大学 | Method for rapidly generating beam plate composite satellite structure common node mesh |
| CN105677965B (en) * | 2016-01-04 | 2018-09-18 | 北京航空航天大学 | A kind of board-like satellite structure conode grid rapid generation |
| CN105701275B (en) * | 2016-01-04 | 2018-11-13 | 北京航空航天大学 | A kind of beam slab combined type satellite structure conode grid rapid generation |
| CN106599463A (en) * | 2016-12-14 | 2017-04-26 | 浙江精工钢结构集团有限公司 | Free-form surface-based parametric modeling method of space grid structure |
| CN109766661A (en) * | 2019-01-28 | 2019-05-17 | 中国矿业大学 | A kind of special-shaped thin wall building structure strengthening method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104965947B (en) | A kind of bridge three-dimensional design method based on BIM technology | |
| CN110580376A (en) | revit and Dynamo-based pile foundation model creation method | |
| CN104408267A (en) | Finite element modeling method for special-shaped spatial structure | |
| CN103488838A (en) | Computer-assisted plotting method for waste heat boiler pipes | |
| CN106600700B (en) | Three-dimensional model data processing system | |
| CN109933765B (en) | Method for extracting Excel table content to CAD table | |
| CN103678737A (en) | Lever system virtual assembly method | |
| CN106874610A (en) | A kind of sloping core earth and rockfill dam modeling method based on VB and CATIA | |
| CN103353866A (en) | Three-dimensional model file format conversion method supporting XNA technology | |
| CN109388843B (en) | Visualization system and method of truss antenna based on VTK (virtual terminal K), and terminal | |
| CN109840878A (en) | It is a kind of based on SystemC towards GPU parameter management method | |
| CN113486429B (en) | Automatic construction method of space intersection structure based on interpolation algorithm | |
| KR101471603B1 (en) | Apparatus and method for performing energy analysis using IFC file | |
| CN102880733A (en) | System and method for hierarchy reconstruction from flattened graphic database system layout | |
| CN111915720B (en) | Automatic conversion method from building Mesh model to CityGML model | |
| CN106650091B (en) | Method for extracting device connection relation in indoor distribution drawing based on AutoCAD platform | |
| CN109933588B (en) | Method and system for converting dwg data into gdb data | |
| CN102254093A (en) | Connected domain statistical correlation algorithm based on Thiessen polygon | |
| CN115690340A (en) | Cross geological profile boundary adjusting method based on two-dimensional and three-dimensional real-time linkage | |
| CN112307725A (en) | Method for adding table information on two-dimensional drawing interface | |
| CN111427867B (en) | Model persistence method based on hybrid storage | |
| CN114117586A (en) | Method for establishing incidence relation between supporting and hanging bracket and rooting object thereof in S3D software | |
| CN101635030A (en) | Automatic matching method of view basal rings facing to engineering drawing | |
| CN112560311A (en) | Method for quickly and automatically extracting structure information and analyzing and optimizing structure | |
| Carrigan et al. | Meshing considerations for automotive shape design optimization |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150311 |
|
| RJ01 | Rejection of invention patent application after publication |