CN107220438B - CAE mechanical simulation method based on BIM information model - Google Patents
CAE mechanical simulation method based on BIM information model Download PDFInfo
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Abstract
The invention discloses a CAE mechanical simulation method based on a BIM information model, which comprises the steps of reconstructing a BIM building three-dimensional geometric model through a grid simplification system, and importing the simplified BIM three-dimensional model into a CAE mechanical simulation system; extracting data information in a BIM information model system, judging the attribute of the change information, transmitting data influencing the mechanical simulation to a CAE mechanical simulation system, and driving the CAE mechanical simulation system to update; and feeding back the mechanical information obtained by the updated CAE mechanical simulation model to the BIM information model, and displaying the calculated mechanical information from the BIM information model. When building designers design on the BIM by applying the method, the mechanical information can be referred to, the design efficiency is improved, in addition, the effective early warning can be carried out on the disasters caused by stress damage in the construction process in the later period, meanwhile, the repeated modeling is avoided, and the cost is saved.
Description
Technical Field
The invention relates to the field of mechanical simulation of constructional engineering, in particular to a CAE mechanical simulation method based on a BIM information model.
Background
BIM is now the indispensable platform of field design, construction, management such as civil engineering, hydraulic engineering, building engineering. However, until now, when building a BIM building information model, the information does not contain mechanical information, on one hand, the mechanical information is not considered as design consideration when early-stage design is carried out, so that the design efficiency is reduced, on the other hand, the stress condition of the building structure cannot be visually and timely seen in the later construction stage, and the disaster early warning effect caused by stress damage cannot be achieved.
Parameter information required by mechanical simulation of the BIM building three-dimensional geometric model, material parameters and the like can be obtained from the BIM building information model, but the BIM building three-dimensional geometric model obtained from the above cannot be directly used for CAE mechanical simulation, and because the BIM building three-dimensional geometric model contains a lot of building detail information, such as small holes, fine grooves, small bosses and the like, the information can cause great influence on grids of a CAE system. If the simulation is not simplified, the simulation speed and precision are seriously affected, and the local distortion unit can cause huge errors of a calculation result and even mislead a designer to draw an incorrect conclusion.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a CAE mechanical simulation method based on a BIM information model, which comprises the mechanical information of the stress condition of a building structure into the BIM information model, on one hand, the automatic transmission of information between a BIM information model system and a CAE mechanical simulation system is realized, and the information of the BIM information model system and the CAE mechanical simulation system is kept to be updated synchronously; on the other hand, the disaster caused by the stress damage in the later construction stage is early warned in time.
A CAE mechanical simulation method based on a BIM information model specifically comprises the following steps:
s1, reconstructing the BIM building three-dimensional geometric model through a grid simplification system, and importing the simplified BIM three-dimensional model into a CAE mechanical simulation system;
s2, extracting data information in the BIM information model system, judging the attribute of the change information, transmitting data influencing the mechanical simulation to the CAE mechanical simulation system, and driving the CAE mechanical simulation system to update;
and S3, feeding back the mechanical information obtained by the updated CAE mechanical simulation model to the BIM information model, and displaying the calculated mechanical information from the BIM information model.
Preferably, the grid simplification system comprises a model filtering module, a component geometric data acquisition module, a component material parameter acquisition module, a grid reconstruction module and a data transmission module;
the model filtering module is used for filtering out main body structures stressed by beams, columns, bearing walls and the like in the BIM building information model;
the acquisition component geometric data module automatically acquires three-dimensional geometric parameters of the components in the main body structure after the components are filtered by the model;
the acquisition component material parameter module is used for automatically acquiring material parameter information of the components in the main body structure after the components are filtered by the model;
the grid reconstruction module is used for reconstructing grids in the original grids in the BIM building information model so as to adapt to CAE mechanical simulation;
and the real-time data transmission module is used for transmitting the change information to the grid simplification system through the real-time data transmission module when the parameters in the BIM building information model change, recalculating the BIM information model by the grid simplification system to finally obtain a new CAE mechanical simulation model, and feeding back the calculated mechanical information to the BIM information model for display after model mechanical simulation.
Preferably, the time-varying mechanical cloud images are generated from the mechanical information obtained from the updated CAE mechanical simulation model in step S3, and are imported into the BIM building three-dimensional geometric model in real time through automatic conversion of a data structure, and the time-varying stress condition of the time-varying mechanical cloud images is displayed on the real-time BIM building three-dimensional geometric model.
Preferably, the stress-strain displacement information reflected in the time-varying mechanical cloud of the updated BIM information model in step S3 is compared with a standard stress-strain displacement condition, analyzed, and evaluated for stability, so as to give an early warning to the sudden change of the updated stress state.
The embodiment of the invention also provides a reconstruction method based on the grid simplified system, which specifically comprises the following steps:
a. the grid simplifying system calls a BIM building information model through a real-time data transmission module;
b. filtering by a model filtering module to obtain a building main structure model;
c. the acquisition component geometric data module automatically acquires a component in the main body structure to acquire three-dimensional geometric parameters of the component;
d. the component material parameter acquisition module is used for automatically acquiring the material parameters of the components in the main body structure;
e. reconstructing the original grid of the BIM building three-dimensional geometric model through a grid reconstruction module;
f. and the grid simplifying system leads the model obtained by the processing in the steps into CAE through a real-time data transmission module for mechanical simulation.
The embodiment of the invention also provides a CAE mechanical simulation system updating method, which specifically comprises the following steps:
1) the BIM information model system completes the parametric design of the three-dimensional model and simultaneously adds modified information parameters for subsequent CAE mechanical simulation analysis;
2) extracting modified data information parameters in a BIM (building information modeling) system through a real-time data transmission module, and then storing the modified data information parameters as an intermediate file which can be identified by a CAE (computer aided engineering) mechanical simulation system;
3) the CAE mechanical simulation system reads the extracted and changed data information parameters and generates a CAE parameterized model;
4) setting solving parameters in a CAE mechanical simulation system, and then carrying out solving operation;
5) after the solution is completed, returning the solved mechanical information result to the BIM information model system to readjust the parameters and then performing CAE analysis, if the selection is yes, returning to the step S1 to perform model adjustment and information parameter modification, and then continuing to operate the program; if no, the analysis is ended.
Preferably, when the information parameters of the BIM building information model change, the real-time data transmission module transmits the change information to the grid simplification system, the grid simplification system judges the attribute of the change information, and when the grid simplification system judges that the data affecting the mechanical simulation, such as the material parameters, the geometric parameters and the like of the main structural member, change, the grid simplification system recalculates the BIM building information model to obtain a new CAE mechanical simulation model, otherwise, recalculation is not needed.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention contains the mechanical information of the stress condition of the building structure into the BIM information model, on one hand, the automatic transmission of the information between the BIM information model system and the CAE mechanical simulation system is realized, and the information of the BIM information model system and the CAE mechanical simulation system can be synchronously updated; on the other hand, by applying the invention, when building designers design buildings on the BIM, the mechanical information can be referred to, the design efficiency is improved, and in the later construction process, the early warning can be carried out on disasters caused by stress damage in the construction process.
2. The CAE mechanical simulation method based on the BIM information model provides an efficient method for mechanical simulation of a building structure, avoids repeated modeling and saves cost.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a system structure of a CAE mechanical simulation method based on a BIM information model according to the present invention;
FIG. 2 is a schematic diagram of the grid reduction system of the present invention;
FIG. 3 is a schematic diagram of a reconstruction method based on a mesh reduction system according to the present invention;
FIG. 4 is a flowchart of the CAE mechanical simulation system updating method of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.
As shown in fig. 1 to 4, an embodiment of the present invention provides a CAE mechanical simulation method based on a BIM information model, which specifically includes the following steps:
s1, reconstructing the BIM building three-dimensional geometric model through a grid simplification system, and importing the simplified BIM three-dimensional model into a CAE mechanical simulation system;
s2, extracting data information in the BIM information model system, judging the attribute of the change information, transmitting data influencing the mechanical simulation to the CAE mechanical simulation system, and driving the CAE mechanical simulation system to update;
and S3, feeding back the mechanical information obtained by the updated CAE mechanical simulation model to the BIM information model, and displaying the calculated mechanical information from the BIM information model.
At present, the existing BIM building three-dimensional geometric model cannot be directly used for CAE mechanical simulation, because the BIM building three-dimensional geometric model contains a lot of building detail information, such as small holes, fine grooves, small bosses and the like, and the information can cause great influence on grids of a CAE system. If the simulation is not simplified, the simulation speed and precision are seriously affected, and the local distortion unit can cause huge errors of a calculation result and even mislead a designer to draw an incorrect conclusion.
Further, when the mechanical information obtained by the updated CAE mechanical simulation model generates a time-varying mechanical cloud picture, the time-varying mechanical cloud picture is imported into the BIM building three-dimensional geometric model in real time through automatic conversion of a data structure, the time-varying stress condition of the BIM building three-dimensional geometric model is displayed on the real-time BIM building three-dimensional geometric model, stress-strain displacement information reflected in the time-varying mechanical cloud picture of the updated BIM information model is compared with the standard stress-strain displacement condition, the analysis is carried out, the stability condition of the BIM information model is evaluated, and early warning is carried out on the sudden change of the updated stress condition in time.
Referring to fig. 2, a mesh simplification system provided in an embodiment of the present invention includes a model filtering module, a module for acquiring geometric data of a component, a module for acquiring material parameters of a component, a mesh reconstruction module, and a data transmission module; the model filtering module filters out main body structures of stress of beams, columns, bearing walls and the like in the BIM building information model due to the fact that the BIM building information model comprises a plurality of parts which are not needed by mechanical simulation, and the filtering function of the model is developed mainly by using a function provided by Revit in the embodiment of the invention; the module for acquiring the geometric data of the component automatically acquires the three-dimensional geometric parameters of the component in the main structure after the component is filtered by the model, and the geometric data of the component is read by mainly utilizing an element. The component material parameter acquisition module is used for automatically acquiring material parameter information of the components in the main body structure after the components are filtered by the model; the grid reconstruction module is used for reconstructing grids in the original grids in the BIM building information model so as to adapt to CAE mechanical simulation; and when the information parameters in the BIM building information model change, the real-time data transmission module transmits the change information to the grid simplification system, the grid simplification system recalculates the BIM information model to finally obtain a new CAE mechanical simulation model, and after the model is mechanically simulated, the mechanical information obtained by calculation is fed back to the BIM information model to be displayed.
Referring to fig. 3, an embodiment of the present invention further provides a reconstruction method based on a mesh simplification system for the mesh simplification system, which specifically includes the following steps:
a. the grid simplifying system calls a BIM building information model through a real-time data transmission module;
b. filtering by a model filtering module to obtain a building main structure model;
c. the acquisition component geometric data module automatically acquires a component in the main body structure to acquire three-dimensional geometric parameters of the component;
d. the component material parameter acquisition module is used for automatically acquiring the material parameters of the components in the main body structure;
e. reconstructing the original grid of the BIM building three-dimensional geometric model through a grid reconstruction module;
f. and the grid simplifying system leads the model obtained by the processing in the steps into CAE through a real-time data transmission module for mechanical simulation.
Referring to fig. 4, an embodiment of the present invention further provides a method for updating a CAE mechanical simulation system, which specifically includes the following steps:
1) the BIM information model system completes the parametric design of the three-dimensional model and simultaneously adds modified information parameters for subsequent CAE mechanical simulation analysis;
2) extracting modified data information parameters in a BIM (building information modeling) system through a real-time data transmission module, and then storing the modified data information parameters as an intermediate file which can be identified by a CAE (computer aided engineering) mechanical simulation system;
3) the CAE mechanical simulation system reads the extracted and changed data information parameters and generates a CAE parameterized model;
4) setting solving parameters in a CAE mechanical simulation system, and then carrying out solving operation;
5) after the solution is completed, returning the solved mechanical information result to the BIM information model system to readjust the parameters and then performing CAE analysis, if the selection is yes, returning to the step S1 to perform model adjustment and information parameter modification, and then continuing to operate the program; if no, the analysis is ended.
When the grid simplification system judges that the data of the main structure member, such as material parameters, geometric parameters and the like, which influence the mechanical simulation change, are changed, the grid simplification system recalculates the BIM building information model to obtain a new CAE mechanical simulation model, otherwise, recalculation is not needed.
The method utilizes real-time three-dimensional space data of BIM in the subway construction process to establish a visual three-dimensional model, the three-dimensional visual building model is continuously changed along with the change of time and data information in the subway construction process in the concrete subway construction process, the three-dimensional visual model is introduced into finite element analysis software, the grid simplification system is used for carrying out proper adjustment, the attribute of changed information is set, and the model parameters are re-determined by utilizing stress, strain and displacement data. The method comprises the steps of establishing a time-varying finite element model according to a CAE mechanical simulation system, verifying a model result by utilizing actually measured stress, strain and displacement data, calculating to obtain the CAE mechanical simulation model in real time, changing a BIM three-dimensional geometric model when parameter information is modified, saving time wasted in modeling, and obtaining corresponding changed mechanical information in time, thereby reducing cost and remarkably improving working efficiency.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (6)
1. A CAE mechanical simulation method based on a BIM information model is characterized by comprising the following steps:
s1, reconstructing the BIM building three-dimensional geometric model through a grid simplification system, and importing the simplified BIM three-dimensional model into a CAE mechanical simulation system;
s2, extracting data information in the BIM information model system, judging the attribute of the change information, transmitting data influencing the mechanical simulation to the CAE mechanical simulation system, and driving the CAE mechanical simulation system to update;
s3, feeding back mechanical information obtained by the updated CAE mechanical simulation model to the BIM information model, and displaying the calculated mechanical information from the BIM information model;
the grid simplifying system comprises a model filtering module, a component geometric data acquiring module, a component material parameter acquiring module, a grid reconstructing module and a data transmission module;
the model filtering module is used for filtering out the main body structures stressed by the beams, the columns and the bearing walls in the BIM building information model;
the acquisition component geometric data module automatically acquires three-dimensional geometric parameters of the components in the main body structure after the components are filtered by the model;
the acquisition component material parameter module is used for automatically acquiring material parameter information of the components in the main body structure after the components are filtered by the model;
the grid reconstruction module is used for reconstructing grids in the original grids in the BIM building information model so as to adapt to CAE mechanical simulation;
and the real-time data transmission module is used for transmitting the change information to the grid simplification system through the real-time data transmission module when the parameters in the BIM building information model change, recalculating the BIM information model by the grid simplification system to finally obtain a new CAE mechanical simulation model, and feeding back the calculated mechanical information to the BIM information model for display after model mechanical simulation.
2. The method for CAE mechanical simulation based on the BIM information model of claim 1, wherein: and generating a time-varying mechanical cloud picture by the mechanical information obtained by the updated CAE mechanical simulation model in the step S3, importing the time-varying mechanical cloud picture into the BIM building three-dimensional geometric model in real time through automatic conversion of a data structure, and displaying the time-varying stress condition of the BIM building three-dimensional geometric model in real time.
3. The method for CAE mechanical simulation based on the BIM information model of claim 1, wherein: and comparing, analyzing and evaluating the stability condition of the stress-strain displacement information reflected in the time-varying mechanical cloud chart of the updated BIM information model in the step S3 with the standard stress-strain displacement condition, and timely warning the updated stress state mutation.
4. The method for CAE mechanical simulation based on BIM information model according to claim 1, wherein the reconstruction method of the mesh reduction system comprises the following steps:
a. the grid simplifying system calls a BIM building information model through a real-time data transmission module;
b. filtering by a model filtering module to obtain a building main structure model;
c. the acquisition component geometric data module automatically acquires a component in the main body structure to acquire three-dimensional geometric parameters of the component;
d. the component material parameter acquisition module is used for automatically acquiring the material parameters of the components in the main body structure;
e. reconstructing the original grid of the BIM building three-dimensional geometric model through a grid reconstruction module;
f. and the grid simplifying system leads the model obtained by the processing in the steps into CAE through a real-time data transmission module for mechanical simulation.
5. The method for CAE mechanical simulation based on the BIM information model according to claim 2 or 3, wherein the CAE mechanical simulation system updating method comprises the following steps:
1) the BIM information model system completes the parametric design of the three-dimensional model and simultaneously adds modified information parameters for subsequent CAE mechanical simulation analysis;
2) extracting modified data information parameters in a BIM (building information modeling) system through a real-time data transmission module, and then storing the modified data information parameters as an intermediate file which can be identified by a CAE (computer aided engineering) mechanical simulation system;
3) the CAE mechanical simulation system reads the extracted and changed data information parameters and generates a CAE parameterized model;
4) setting solving parameters in a CAE mechanical simulation system, and then carrying out solving operation;
5) after the solution is completed, returning the solved mechanical information result to the BIM information model system to readjust the parameters and then performing CAE analysis, if the selection is yes, returning to the step S1 to perform model adjustment and information parameter modification, and then continuing to operate the program; if no, the analysis is ended.
6. The method for CAE mechanical simulation based on the BIM information model according to claim 5, wherein: when the information parameters of the BIM building information model change, the real-time data transmission module transmits the change information to the grid simplification system, the grid simplification system judges the attribute of the change information, and when the grid simplification system judges that the change is the data change that the material parameters and the geometric parameters of the main structure member influence the mechanical simulation, the grid simplification system recalculates the BIM building information model to obtain a new CAE mechanical simulation model, otherwise, recalculation is not needed.
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| CN108487635B (en) * | 2018-03-06 | 2020-05-08 | 中建五局华东建设有限公司 | Fabricated building construction method |
| CN111859493A (en) * | 2019-04-19 | 2020-10-30 | 南京林业大学 | Bridge construction monitoring visualization system based on Revit software |
| CN112329190A (en) * | 2019-07-31 | 2021-02-05 | 比亚迪股份有限公司 | Stress extraction method, system, electronic device and storage medium |
| CN111259579B (en) * | 2020-01-09 | 2024-01-30 | 南京星火技术有限公司 | Electronic device, simulation apparatus, and computer-readable medium |
| CN115906714B (en) * | 2023-02-22 | 2023-05-30 | 拉普拉斯(无锡)半导体科技有限公司 | Plate PECVD reaction chamber airflow simulation method and simulation equipment thereof |
| CN117097717B (en) * | 2023-08-16 | 2024-03-22 | 浙江远算科技有限公司 | File transmission optimization method and system for simulation result and electronic equipment |
| CN116992547B (en) * | 2023-09-25 | 2023-12-12 | 中国电建集团贵阳勘测设计研究院有限公司 | Three-dimensional building modeling method and system |
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