CN114330062A - Grasshopper-based mobile steel guardrail parameterization rapid modeling method - Google Patents
Grasshopper-based mobile steel guardrail parameterization rapid modeling method Download PDFInfo
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- CN114330062A CN114330062A CN202111639899.8A CN202111639899A CN114330062A CN 114330062 A CN114330062 A CN 114330062A CN 202111639899 A CN202111639899 A CN 202111639899A CN 114330062 A CN114330062 A CN 114330062A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 49
- 239000010959 steel Substances 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 20
- 241000254032 Acrididae Species 0.000 title claims abstract description 18
- 238000004873 anchoring Methods 0.000 claims abstract description 7
- 238000013461 design Methods 0.000 claims abstract description 7
- 241000282806 Rhinoceros Species 0.000 claims description 8
- 238000010276 construction Methods 0.000 claims description 3
- 238000009966 trimming Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 238000004088 simulation Methods 0.000 description 5
- 238000011960 computer-aided design Methods 0.000 description 3
- 230000000007 visual effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The invention discloses a method for quickly modeling a mobile steel guardrail parameterization based on grasshopper, which comprises the following steps: 1) drawing a standard knot of the movable steel guardrail, and drawing a model I by using a Rhino according to a design drawing of the movable steel guardrail; 2) establishing a simple model, selecting each part of the standard knot of the movable steel guardrail by using a geometric selection battery of the Rhino system, keeping initial parameters unchanged, and generating the simple model; 3) and the rapid modeling is carried out, and another type of mobile steel guardrail can be generated by changing input parameters for mobile steel guardrails with different heights and different anchoring intervals. The method effectively saves human resources, is simple to operate, reduces the working intensity of workers, breaks the constraint of production time, and effectively improves the modeling production efficiency.
Description
The technical field is as follows:
the invention relates to a method for quickly modeling a mobile steel guardrail parameterization based on grasshopper, belonging to the field of computer aided design and manufacturing.
Background art:
in finite element simulation, three-dimensional modeling is the most time-consuming part, and the quality and speed of modeling often determine the efficiency of simulation. The traditional method mainly comprises the step of manually modeling by using computer software such as CAD (computer-aided design) and 3DMAX (numerical control X), so that the workload is high when manual modeling is carried out in production, errors are easy to occur when manual modeling is carried out one by one, the efficiency is low, and the workload redundancy can be caused.
During finite element simulation, geometric models with different guardrail heights and different anchoring distances are needed, but basic parameters of the movable steel guardrail are different. For the traditional modeling method of the existing rhinoceros software, as long as the model has different parameters, the model needs to be built again, the process is very complicated, and the method is very inconvenient and affects the production efficiency.
The invention content is as follows:
in order to overcome the defects of the prior art, the invention aims to provide a grasshopper-based mobile steel guardrail parameterization rapid modeling method, which effectively saves human resources, is simple to operate, reduces the working strength of workers, breaks the constraint of production time, and effectively improves the modeling production efficiency.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a method for quickly modeling a mobile steel guardrail parameterization based on grasshopper comprises the following steps:
1) drawing a standard knot of the movable steel guardrail, and drawing a model I by using a Rhino according to a design drawing of the movable steel guardrail;
2) establishing a simple model, selecting each part of the standard knot of the movable steel guardrail by using a geometric selection battery of the Rhino system, keeping initial parameters unchanged, and generating the simple model;
3) and the rapid modeling is carried out, and another type of mobile steel guardrail can be generated by changing input parameters for mobile steel guardrails with different heights and different anchoring intervals.
Preferably, the step of drawing the standard knot of the movable steel guardrail in the step 1) comprises the following steps:
1.1) firstly, drawing section lines through the construction lines in the Rhino according to a design drawing of the movable steel guardrail, and then generating an actual plane by the sections formed by the section lines;
and 1.2) extruding the formed body along the normal direction of the generated plane, and generating the standard knot of the movable steel guardrail by using trimming and dividing commands.
Preferably, the step of establishing a simple model in step 2) further comprises:
2.1) selecting each part of the rhinoceros model by using a Grasshopper framework in a Rhino system and a Geometry battery carried by the system;
2.2) shutting down each Geometry battery with the Geometry selected in the previous step.
Preferably, the step of fast modeling in step 3) further comprises:
3.1) dragging and marking number slider batteries with guardrail heights and guardrail lengths to generate movable steel guardrails with different guardrail heights and guardrail lengths;
3.2) selecting a Geometry output end of an origin Direction battery by using a middle key of a mouse, selecting a Bake command, and copying a geometric model generated by Grasshopper into a rhinoceros for editing and storing;
3.3) the copied geometric model is stored as IGES and STEP file names and is imported into finite element analysis software to realize rapid modeling.
Compared with the prior art, the invention has the beneficial effects that:
the method provides a geometric model for constructing Hypermesh by using Rhino
By taking the time consumption for constructing the model as a measurement standard, software such as SolidWorks, 3Dmax, AutoCAD, rhinoceros and the like is contrastively analyzed, and the specific model constructing mode of the rhinoceros software can be shortened by about 50 percent. The geometric model constructed by the rhinoceros is stored in IGES and STEP formats, can be imported into Hypermesh, and is creatively constructed by rhinoceros software, so that the geometric model construction mode of finite element simulation is enriched.
Provides a rapid modeling method for a mobile steel guardrail
A method for rapidly constructing a guardrail model by utilizing Grasshopper plug-in units and realizing Rhino is researched. The guardrail model of finite element simulation is quickly constructed by using a visual programming language for the first time, and the movable steel guardrail with the same or different shape can be generated by dragging the progress bars of two batteries (number sliders) with the height and the length of the guardrail, so that the production efficiency is effectively improved.
Can reduce the error rate of constructing the guardrail model to the minimum
And dragging the visual progress bar (number slider) to generate the mobile steel guardrail model. In the past, errors are easily caused by manual modeling one by one, and the required geometric model can be accurately and inerrably constructed by utilizing the number slider visual digital battery, so that the error rate of constructing the guardrail model is reduced to the lowest.
Description of the drawings:
FIG. 1 is a flow chart of a method of the present invention; FIG. 2 is a schematic diagram of model one of an embodiment of the present invention; FIG. 3 is a diagram of model two of an embodiment of the present invention.
The present invention will be further described with reference to the following detailed description and accompanying drawings.
The specific implementation mode is as follows:
in order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A method for quickly modeling a mobile steel guardrail parameterization based on grasshopper comprises the following steps:
1) drawing a standard knot of the movable steel guardrail, and drawing a model I by using a Rhino according to a design drawing of the movable steel guardrail;
1.1) firstly, drawing a section line through a composition line (such as a straight line, a circular arc and the like) in the Rhino according to a design drawing of the movable steel guardrail, and then generating an actual plane from the section formed by the section line;
1.2) extruding the body along the normal direction of the generated plane, and generating the standard knot of the movable steel guardrail by using a trimming, dividing and similar commands.
2) Establishing a simple model, selecting each part of the standard knot of the movable steel guardrail by using a geometric selection battery of the Rhino system, keeping initial parameters unchanged, and generating the simple model;
2.1) selecting each part of the rhinoceros model by using a Grasshopper framework in a Rhino system and a Geometry battery carried by the system;
2.2) shutting down each Geometry battery with the Geometry selected in the previous step.
3) And the rapid modeling is carried out, and another type of mobile steel guardrail can be generated by changing input parameters for mobile steel guardrails with different heights and different anchoring intervals.
3.1) dragging and marking number slider batteries with guardrail heights and guardrail lengths to generate movable steel guardrails with different guardrail heights and guardrail lengths;
3.2) selecting a Geometry output end of an origin Direction battery by using a middle key of a mouse, selecting a Bake command, and copying a geometric model generated by Grasshopper into a rhinoceros for editing and storing;
3.3) the copied geometric model is stored as IGES and STEP file names and is imported into finite element analysis software to realize rapid modeling. Under the conditions that the mobile steel guardrails with different heights and different anchoring intervals have similar structures, firstly, the selected geometric bodies are replaced to quickly obtain corresponding simple models, and then the number slider batteries are dragged to produce the mobile steel guardrail models
The invention avoids the phenomenon that the model is built from beginning to end as long as the model has different heights or different anchoring intervals. Meanwhile, the phenomenon that manual modeling is easy to make mistakes when manual modeling is carried out one by one is avoided, the production system is an intelligent production system, relevant parameters of the number slider battery are dragged, and a new movable steel guardrail model can be quickly obtained by using the same other steps, so that the manpower resource is effectively saved, the operation is simple, the use is reliable, the working strength is reduced, and the production efficiency is effectively improved.
It should be noted that the detailed description of the invention is not included in the prior art, or can be directly obtained from the market, and the detailed connection mode can be widely applied in the field or daily life without creative efforts, and the detailed description is not repeated here.
Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction. Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (4)
1. A method for quickly modeling a mobile steel guardrail parameterization based on grasshopper is characterized by comprising the following steps:
1) drawing a standard knot of the movable steel guardrail, and drawing a model I by using a Rhino according to a design drawing of the movable steel guardrail;
2) establishing a simple model, selecting each part of the standard knot of the movable steel guardrail by using a geometric selection battery of the Rhino system, keeping initial parameters unchanged, and generating the simple model;
3) and the rapid modeling is carried out, and another type of mobile steel guardrail can be generated by changing input parameters for mobile steel guardrails with different heights and different anchoring intervals.
2. The method for parameterized and rapidly modeling the mobile steel guardrail based on the grasshopper as claimed in claim 1, wherein the step of drawing the standard knot of the mobile steel guardrail in the step 1) comprises the following steps:
1.1) firstly, drawing section lines through the construction lines in the Rhino according to a design drawing of the movable steel guardrail, and then generating an actual plane by the sections formed by the section lines;
and 1.2) extruding the formed body along the normal direction of the generated plane, and generating the standard knot of the movable steel guardrail by using trimming and dividing commands.
3. The method for parameterized and rapidly modeling mobile steel guardrails based on the grasshopper according to claim 1, wherein the step of establishing the simple model in the step 2) comprises the following steps:
2.1) selecting each part of the rhinoceros model by using a Grasshopper framework in a Rhino system and a Geometry battery carried by the system;
2.2) shutting down each Geometry battery with the Geometry selected in the previous step.
4. The method for parameterizing rapid modeling of mobile steel guard rails based on the grasshopper according to claim 1, wherein the rapid modeling in the step 3) comprises the following steps:
3.1) dragging and marking number slider batteries with guardrail heights and guardrail lengths to generate movable steel guardrails with different guardrail heights and guardrail lengths;
3.2) selecting a Geometry output end of an origin Direction battery by using a middle key of a mouse, selecting a Bake command, and copying a geometric model generated by Grasshopper into a rhinoceros for editing and storing;
3.3) the copied geometric model is stored as IGES and STEP file names and is imported into finite element analysis software to realize rapid modeling.
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