CN108897943A - A kind of rung formula Cable Truss Structure digital simulation pre-assembly method based on BIM model - Google Patents
A kind of rung formula Cable Truss Structure digital simulation pre-assembly method based on BIM model Download PDFInfo
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- CN108897943A CN108897943A CN201810665772.5A CN201810665772A CN108897943A CN 108897943 A CN108897943 A CN 108897943A CN 201810665772 A CN201810665772 A CN 201810665772A CN 108897943 A CN108897943 A CN 108897943A
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- G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
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Abstract
The invention discloses a kind of, and the rung formula Cable Truss Structure digital simulation pre-assembly method based on BIM model obtains the prestressing force of rung formula Cable Truss Structure into kenel BIM model, that is, flexible cable theoretical model in a computer；By 3-D scanning technology, the flexible cable physical model i.e. mathematical model of flexible cable produced is obtained；Flexible cable physical model in amendment step B；Coordinate conversion is carried out by characteristic point of the computer to the theoretical model of flexible cable and the fitting face of physical model, and then realizes digital simulation preassembling；Structural analysis is carried out to fitting surface error by FEM-software ANSYS.The present invention compensates for the blank of the preassembling of flexible member, solves the production key problem of scale fixed length drag-line in Practical Project：The long quality inspection requirement for whether meeting design of rope, proposes the digital simulation preassembling process of the rung formula cable truss of complete set.
Description
Technical field
The present invention relates to steel constructions to process product quality detection field, is especially based on BIM model more particularly to a kind of
Rung formula Cable Truss Structure digital simulation pre-assembly method.
Background technique
Steel construction processing factory is to the component preassembling produced, it has also become examines the necessary process of processing quality together.But
It is the limitation of the limitation due to place, time and cost, actual entity preassembling can not be carried out, therefore digital simulation is pre-splicing
Dress technology passes through the preassembling process of computer simulation labyrinth, it has also become current urgently open question.
Rung formula cable-truss roof has the characteristics that structure slim and graceful, novel appearance, big from heavy and light, rigidity, and engineering is answered
With further extensively.These with spatial correlation drag-lines production, installation control difficulty it is bigger, position accuracy demand compared with
It is high.
Rung formula cable-truss roof construction method mostly uses greatly the whole method for promoting synchronous tension, using traction work
Dress can calculate structure and be installed in place when radial rustling sound head is connected to pin the lug plate holes on rigid ring beam.Again because of rung formula
Drag-line is mostly scale fixed-length blanking in cable-truss roof, therefore the grid deviation degree of rope head and lug plate holes, is to influence structure
One of key factor of mechanical property.
Compared with the preassembling of rigid member, since drag-line has prestressed presence, drag-line itself generation is inevitably resulted in
Deformation, therefore the local coordinate of the Model Measured of drag-line is determined to become a difficult point.
Summary of the invention
It is pre- technical problem to be solved by the present invention lies in a kind of digital simulation is provided for rung formula cable-truss roof
Assembling method.Aim to solve the problem that the problem of rung formula cable truss can not carry out entity preassembling.
The invention is realized in this way a kind of rung formula Cable Truss Structure digital simulation preassembling side based on BIM model
Method, this approach includes the following steps：
Step A：In a computer, the prestressing force of rung formula Cable Truss Structure is obtained into kenel BIM model, that is, flexible cable
Theoretical model；
Step B：By 3-D scanning technology, the digital mould for the i.e. flexible cable of flexible cable physical model produced is obtained
Type；
Step C：Flexible cable physical model in amendment step B；
Step D：It is sat by characteristic point of the computer to the theoretical model of flexible cable and the fitting face of physical model
Mark conversion, and then realize digital simulation preassembling；
Step E：Structural analysis is carried out to fitting surface error by FEM-software ANSYS.
The step A is specially：Prestressing force is extracted into kenel modal displacement according to FEM-software ANSYS, is obtained pre-
Stress imports in BIM model at kenel Nodes Three-dimensional coordinate, establishes rung formula cable truss prestressing force into the BIM three-dimensional mould of kenel
Type, i.e. BIM three-dimensional DEM.
The rung formula cable truss prestressing force is rung formula cable-truss roof after construction stretching molding at kenel
Construction target kenel.
The rung formula cable truss prestressing force is to extract prestressing force into kenel according to ANSYS at kenel Nodes Three-dimensional coordinate
Modal displacement value (Δ x1,Δy1,Δz1), and look for the corresponding Nodes Three-dimensional coordinate (x before power1’,y1’,z1') calculated (Δ
x1+x1'=x1,Δy1+y1'=y1,Δz1+z1'=z1) obtained three-dimensional coordinate (x1,y1,z1)。
The rung formula cable truss prestressing force is the BIM such as Revit, Bentley or Catia at kenel BIM threedimensional model
Visualization Modeling software passes through certain modeling technique hand according to calculated prestressing force at kenel Nodes Three-dimensional coordinate
Section, such as the metric system routine race based on line, obtained BIM threedimensional model are established in Revit.
By three-dimensional scanning device, the flexible cable component processed is scanned.Flexible cable is nature
Under place straight；Either tensioning is placed to design prestress value state on production cableway；When either directly scanning blanking
Prestressing force tension state, then both ends rope head etc. is scanned respectively.
Repeat the 3-D scanning model that step A-E obtains all drag-lines, the i.e. physical model (mathematical model) of drag-line.
Correct flexible cable physical model first according to the mechanics of materials, flexible cable is imaginable flexibility, be not subject to pressure and
Moment of flexure；Linear elastic materials meet Hooke's law；The radial extent amount of flexible cable is calculated, passes through BIM software correction drag-line
Model Measured is at kenel length value.Consider theoretical model single cable deformation angle in plane, it is real to modify drag-line by BIM software
Survey the deformation of single cable angle in model forming state plane.
Theoretical model single cable deformation angle in the plane has band two kinds of situations of cord clip and no cord clip.
The fitting face of selection is the interface of radial rustling sound head and ring beam otic placode, and feature fitting point chooses every hole up and down altogether
At eight, digital simulation preassembling is realized to fitting region feature point coordinate conversion by computer.
By FEM-software ANSYS, in a manner of changing flexible cable length, flexible cable rope head and lug plate holes are simulated
Error of coordinate, thus by digital simulation preassembling accurate judgement produce flexible cable it is whole to structural mechanical property and structure
The influence degree of body deformation.
It is described in such a way that FEM-software ANSYS simulates the error of coordinate of rope head and lug plate holes, be using existing
Error of coordinate heated up to radial cable by softwares such as FEM-software ANSYSs, forced node displacement etc. is long to change rope
Mode.
The present invention compensates for the blank of the preassembling of flexible member, solves the production of scale fixed length drag-line in Practical Project
Key problem：The long quality inspection requirement for whether meeting design of rope, the digital simulation for proposing the rung formula cable truss of complete set are pre-
Assembled process.
Detailed description of the invention
Fig. 1 is that a kind of rung formula Cable Truss Structure digital simulation based on BIM model provided in an embodiment of the present invention is pre-splicing
Fill method flow diagram.
Fig. 2 is rung of embodiment of the present invention formula cable truss prestressing force into kenel BIM threedimensional model.
Fig. 3 is the drag-line 3-D scanning of rung formula cable truss of embodiment of the present invention nature straight.
Fig. 4 is rung formula cable truss drag-line physical model of embodiment of the present invention amendment flow chart.
Fig. 5 is the drag-line point cloud model that the amendment of rung formula cable truss of the embodiment of the present invention is completed.
Specific embodiment
In order to which the objectives, technical solutions, and advantages of the present invention are clearer, with reference to the accompanying drawings and embodiments, to this hair
Bright further description, it should be appreciated that specific embodiment described herein does not limit this hair only to explain
It is bright.
Rung formula Cable Truss Structure with flexible member actually can not carry out entity preassembling in factory, because
The rigidity of structure is established by applying prestressing force to drag-line, and prestressed application procedure structure geometrical non-linearity is significant；Rigidity
The preassembling of component is not consider equal deformation itself and internal force, be only it is mobile in the position of three-dimensional space between component, therefore, pass
The rigid member pre-assembly method of system can not be applicable in.Therefore the present invention compensates for the blank of the preassembling for flexible member, solution
It has determined the production key problem of scale fixed length drag-line in Practical Project：The long quality inspection requirement for whether meeting design of rope, proposes one
Cover the digital simulation preassembling process of complete rung formula cable truss.
As shown in Figure 1, a kind of rung formula Cable Truss Structure digital simulation pre-assembly method based on BIM model, includes following
Step：Step A：The prestressing force of rung formula Cable Truss Structure is obtained into kenel BIM model (i.e. theoretical model)；Step B：Pass through three
Scanning technique is tieed up, the flexible cable physical model (i.e. mathematical model) produced is obtained；Step C：Correct flexible cable entity mould
Type；Step D：Digital simulation preassembling is realized to fitting region feature point coordinate conversion by computer；Step E：Pass through finite element
Software carries out structural analysis to fitting surface error.
This technology concrete application mode in engineering is as follows:
1) three-dimensional DEM designs:Finite element model is established using ANSYS software, kenel section is extracted into according to ANSYS
Point displacement, obtains into kenel Nodes Three-dimensional coordinate, imports in revit software, establishes structure using the metric system conventional model based on line
Part race establishes BIM threedimensional model, to obtain the three-dimensional DEM of shaping structures state.As shown in Figure 2.
2) the solid threedimensional scanning of drag-line：Under the conditions of environment is good, in drag-line factory, using spatial digitizer
Device A scans the drag-line of nature straight on scanning platform, obtains drag-line point cloud model A；In steel construction processing factory, adopt
With triplex scanner B, 3-D scanning is carried out to otic placode on scanning platform, obtains otic placode point cloud model B.As shown in Figure 3.
3) single cable Model Measured is corrected：It is main consider the deformation of drag-line radial extent and two kinds of plane internal deformation influence because
Element, as shown in Fig. 4 amendment process.It is determining unstressed drag-line raw footage in fact at kenel single cable radial extent deflection
The problem of.According to the mechanics of materials, rope is imaginable flexibility, is not subject to pressure and moment of flexure；Linear elastic materials meet Hooke's law；Meter
Calculation obtains the radial extent amount of rope, and drag-line Model Measured is directly corrected by BIM software into kenel length value.Consider reason in plane
By model single cable deformation angle, single cable angle in drag-line Model Measured molding state plane is directly modified by BIM software
The deformation of degree.It is as shown in Figure 5 to correct the drag-line point cloud model completed.
4) the digital simulation preassembling of drag-line：It selects Cable head rope hole and lug plate holes is fitting face, feature fitting clicks
It takes every hole up and down at totally 8, feature fitting point three-dimensional coordinate is extracted in local coordinate system, is fitted in global coordinate system special
Match point three-dimensional coordinate is levied, obtains feature fitting point three-dimensional coordinate difference.
5) digital simulation preassembling interpretation of result：What the error that feature fitting point three-dimensional coordinate difference is reflected substantially referred to
It is the long error of rope, analysis method can also can use finite element software according to related specifications, to change guy cable length and force section
The mode of point displacement, to rung formula Cable Truss Structure internal force simulation analysis.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any change, modification, equivalent replacement and improvement for being done etc. should all be within protection scope of the present invention.
Claims (10)
1. a kind of rung formula Cable Truss Structure digital simulation pre-assembly method based on BIM model, it is characterised in that：This method packet
Include following steps：
Step A：In a computer, the prestressing force of rung formula Cable Truss Structure is obtained into kenel BIM model, that is, flexible cable reason
By model；
Step B：By 3-D scanning technology, the flexible cable physical model i.e. mathematical model of flexible cable produced is obtained；
Step C：Flexible cable physical model in amendment step B；
Step D：Coordinate is carried out by characteristic point of the computer to the theoretical model of flexible cable and the fitting face of physical model to turn
It changes, and then realizes digital simulation preassembling；
Step E：Structural analysis is carried out to fitting surface error by FEM-software ANSYS.
2. a kind of rung formula Cable Truss Structure digital simulation pre-assembly method based on BIM model according to claim 1,
It is characterized in that：The step A is specially：Prestressing force is extracted into kenel modal displacement according to FEM-software ANSYS, is obtained
Prestressing force imports in BIM model at kenel Nodes Three-dimensional coordinate, and it is three-dimensional at the BIM of kenel to establish rung formula cable truss prestressing force
Model, i.e. BIM three-dimensional DEM.
3. a kind of rung formula Cable Truss Structure digital simulation pre-assembly method based on BIM model according to claim 1,
It is characterized in that：The rung formula cable truss prestressing force is rung formula cable-truss roof in construction stretching molding at kenel
Construction target kenel afterwards.
4. a kind of rung formula Cable Truss Structure digital simulation pre-assembly method based on BIM model according to claim 1,
It is characterized in that：The rung formula cable truss prestressing force at kenel Nodes Three-dimensional coordinate be according to ANSYS extract prestressing force at
Kenel modal displacement value (Δ x1,Δy1,Δz1), and look for the corresponding Nodes Three-dimensional coordinate (x before power1’,y1’,z1') counted
Calculate (Δ x1+x1'=x1,Δy1+y1'=y1,Δz1+z1'=z1) obtained three-dimensional coordinate (x1,y1,z1)。
5. a kind of rung formula Cable Truss Structure digital simulation pre-assembly method based on BIM model according to claim 1,
It is characterized in that：The rung formula cable truss prestressing force is Revit, Bentley or Catia etc. at kenel BIM threedimensional model
BIM Visualization Modeling software passes through certain modeling technique according to calculated prestressing force at kenel Nodes Three-dimensional coordinate
The metric system routine race based on line, obtained BIM threedimensional model are established in means, such as Revit.
6. a kind of rung formula Cable Truss Structure digital simulation pre-assembly method based on BIM model according to claim 1,
It is characterized in that：By three-dimensional scanning device, the flexible cable component processed is scanned；Flexible cable is nature shape
It is placed straight under state；Either tensioning is placed to design prestress value state on production cableway；Either directly scan blanking
When prestressing force tension state, then scan both ends rope head etc. respectively；
Repeat the 3-D scanning model that step A-E obtains all drag-lines, the i.e. physical model of drag-line.
7. a kind of rung formula Cable Truss Structure digital simulation pre-assembly method based on BIM model according to claim 1,
It is characterized in that：Flexible cable physical model is corrected first according to the mechanics of materials, flexible cable is imaginable flexibility, is not subject to pressure
And moment of flexure；Linear elastic materials meet Hooke's law；The radial extent amount of flexible cable is calculated, is drawn by BIM software correction
Rope Model Measured is at kenel length value；Consider theoretical model single cable deformation angle in plane, drag-line is modified by BIM software
Model Measured forms the deformation of single cable angle in state plane.
8. a kind of rung formula Cable Truss Structure digital simulation pre-assembly method based on BIM model according to claim 1,
It is characterized in that：Theoretical model single cable deformation angle in the plane has band two kinds of situations of cord clip and no cord clip.
9. a kind of rung formula Cable Truss Structure digital simulation pre-assembly method based on BIM model according to claim 1,
It is characterized in that：The fitting face of selection is the interface of radial rustling sound head and ring beam otic placode, and it is left up and down that feature fitting point chooses every hole
At totally eight, digital simulation preassembling is realized to fitting region feature point coordinate conversion by computer in the right side.
10. a kind of rung formula Cable Truss Structure digital simulation preassembling side based on BIM model according to claim 1
Method, it is characterised in that：By FEM-software ANSYS, in a manner of changing flexible cable length, simulation flexible cable rope head with
The error of coordinate of lug plate holes, thus the flexible cable produced by digital simulation preassembling accurate judgement to structural mechanical property and
The influence degree of structure overall deformation；
It is described in such a way that FEM-software ANSYS simulates the error of coordinate of rope head and lug plate holes, be to utilize existing seat
Error is marked, by softwares such as FEM-software ANSYSs, is heated up to radial cable, forced node displacement etc., to change the long side of rope
Formula.
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| CN201910339942.5A CN110059428A (en) | 2018-06-26 | 2019-04-25 | A kind of rung formula Cable Truss Structure digital simulation pre-assembly method based on BIM model |
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| CN201810665772.5A CN108897943A (en) | 2018-06-26 | 2018-06-26 | A kind of rung formula Cable Truss Structure digital simulation pre-assembly method based on BIM model |
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| CN201910339942.5A Pending CN110059428A (en) | 2018-06-26 | 2019-04-25 | A kind of rung formula Cable Truss Structure digital simulation pre-assembly method based on BIM model |
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Cited By (5)
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| CN110175348A (en) * | 2019-04-03 | 2019-08-27 | 北京星际荣耀空间科技有限公司 | A kind of alignment of rudder stock of pneumatic rudder piece determines method and device |
| CN110188423A (en) * | 2019-05-16 | 2019-08-30 | 广西交通设计集团有限公司 | A kind of linear engineering structure fast B IM modeling method based on FEM meshing |
| CN111395173A (en) * | 2020-03-23 | 2020-07-10 | 东南大学 | BIM-based steel truss arch bridge bolt connection construction precision control method |
| CN112081285A (en) * | 2020-08-17 | 2020-12-15 | 北京市建筑工程研究院有限责任公司 | Method for determining length of prestressed stay cable of cable structure |
| CN112084686A (en) * | 2020-08-17 | 2020-12-15 | 北京市建筑工程研究院有限责任公司 | Cable structure form finding analysis method |
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| JP4851372B2 (en) * | 2007-03-16 | 2012-01-11 | 古河電気工業株式会社 | Long flexible structure simulation system, simulation method, program, and information recording medium |
| CN102733481B (en) * | 2012-06-18 | 2017-11-10 | 中国航空规划设计研究总院有限公司 | A kind of construction method of asymmetric openings formula integral tension cable-membrane analysis |
| CN106354950B (en) * | 2016-08-31 | 2020-02-21 | 华中科技大学 | Steel structure pre-assembly method and system |
| CN106886659A (en) * | 2017-03-21 | 2017-06-23 | 湖南联智监测科技有限公司 | The virtual pre-splicing and detection method of steel structure bridge based on 3 D laser scanning and cloud platform |
| CN107229786A (en) * | 2017-05-24 | 2017-10-03 | 上海理工大学 | Model reconstruction method based on FEM post-processing |
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2018
- 2018-06-26 CN CN201810665772.5A patent/CN108897943A/en not_active Withdrawn
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- 2019-04-25 CN CN201910339942.5A patent/CN110059428A/en active Pending
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| CN110188423A (en) * | 2019-05-16 | 2019-08-30 | 广西交通设计集团有限公司 | A kind of linear engineering structure fast B IM modeling method based on FEM meshing |
| CN110188423B (en) * | 2019-05-16 | 2022-08-09 | 广西交通设计集团有限公司 | Linear engineering structure rapid BIM modeling method based on finite element meshing |
| CN111395173A (en) * | 2020-03-23 | 2020-07-10 | 东南大学 | BIM-based steel truss arch bridge bolt connection construction precision control method |
| CN111395173B (en) * | 2020-03-23 | 2021-06-29 | 东南大学 | BIM-based steel truss arch bridge bolt connection construction precision control method |
| CN112081285A (en) * | 2020-08-17 | 2020-12-15 | 北京市建筑工程研究院有限责任公司 | Method for determining length of prestressed stay cable of cable structure |
| CN112084686A (en) * | 2020-08-17 | 2020-12-15 | 北京市建筑工程研究院有限责任公司 | Cable structure form finding analysis method |
| CN112081285B (en) * | 2020-08-17 | 2021-10-19 | 北京市建筑工程研究院有限责任公司 | Method for determining length of prestressed stay cable of cable structure |
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Application publication date: 20181127 |