Parameterized BIM modeling method

Abstract

The invention relates to the technical field of building information modeling, and discloses a parameterized BIM modeling method, which comprises the following steps: step 1, acquiring specific design parameters of a modeling object in a project design requirement, marking key geometric parameters of the object, including length, width, height, volume and material characteristics, and defining units, physical meanings and application ranges of the parameters in a marking process, a basis is provided for subsequent entity model construction; and 2, based on the geometric parameters marked in the step 1, a solid model is constructed through a BIM modeling tool, and the solid model is a visual model with the shape, the size and the position determined through the geometric parameters in a three-dimensional space. The three-dimensional BIM model is dynamically generated and modified by modifying geometric parameters, model construction is more flexible and efficient due to introduction of parameterization logic, automatic adjustment and rapid iteration of the model are achieved, and the reusability of BIM modeling and the design efficiency of the building model are remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of building information modeling, and specifically provides a parametric BIM modeling method. Background Art

[0002] Building information model is an important technology in the current field of construction engineering. By constructing a digital three-dimensional building model, integrating the geometric information, physical properties and functional attributes of the building, it supports the design, construction and operation and maintenance of the whole life cycle of the building. However, the traditional BIM modeling method usually relies on manual modeling, which has problems such as low efficiency, low flexibility and poor reusability.

[0003] In actual engineering projects, building design needs to be iteratively adjusted multiple times, and the design requirements at different stages put forward dynamic modification requirements for the building model. However, the traditional BIM modeling tools cannot quickly respond to modifications, resulting in a long design process and easy occurrence of data differences. In addition, the existing BIM models lack parametric logic support during the construction process, and the geometric attributes, logical relationships and constraint conditions of the model components cannot form an effective association, making it impossible to achieve automatic adjustment and optimization of the model.

[0004] Parametric design, as an advanced modeling concept, shows potential in product design and engineering modeling by associating the geometric characteristics of the design object with parameter variables, enabling the design object to be dynamically generated and adjusted according to parameter changes. However, there are still technical difficulties in the application of parametric design in BIM modeling:

[0005] How to effectively introduce parametric logic into the BIM model construction process to achieve the dynamic generation and modification of the three-dimensional building model;

[0006] How to construct an efficient, flexible and engineering requirement-compliant BIM model based on basic geometric principles through the logical association of points, lines, surfaces and solids;

[0007] How to introduce geometric constraints, global constraints and logical constraints in the model construction to ensure the accuracy and coordination of the model;

[0008] How to generate a BIM model with a standardized format and supporting multi-platform collaboration to meet the requirements of building whole life cycle management.

[0009] Therefore, those skilled in the art provide a parametric BIM modeling method to solve the above-mentioned problems. Summary of the Invention

[0010] Aiming at the deficiencies of the prior art, the present invention provides a parametric BIM modeling method to solve the problems raised in the above background art.

[0011] To achieve the above objectives, the present invention is realized through the following technical solutions: A parametric BIM modeling method, comprising:

[0012] Step 1: Obtain the specific design parameters of the modeling objects in the project design requirements, and label the key geometric parameters of the objects, including length, width, height, volume, and material properties. During the labeling process, clarify the unit, physical meaning, and applicable range of the parameters to provide a basis for subsequent entity model construction;

[0013] Step 2: Based on the geometric parameters labeled in Step 1, use a BIM modeling tool to construct an entity model. Among them, the entity model is a visual model whose shape, size, and position are defined by geometric parameters in a three-dimensional space. The geometric features of the entity model and the design parameters are synchronously updated through dynamic association to adapt to parameter changes;

[0014] Step 3: On the basis of the entity model constructed in Step 2, define the constraint relationships between entity models. The constraint relationships include geometric constraints, distance constraints, and connection constraints. By adding constraint relationships, ensure the logical association and spatial coordination between models;

[0015] Step 4: On the basis of the constraint relationships defined in Step 3, further add global constraint conditions. The global constraints include structural stability constraints, material property constraints, and functional requirement constraints to ensure the overall consistency and functional integrity of the model;

[0016] Step 5: Combining the global constraints in Step 4, comprehensively verify the entity model, parameter annotation, and constraint relationships to confirm the correctness of the geometric data and parameter logic of the model. The building information model that passes the verification is used as the final result. The building information model contains geometric data, parameter annotation information, and constraint logic, and is exported as a standardized format file that supports cross-platform operations;

[0017] Step 6: Based on the building information model generated in Step 5, conduct interactive testing and adaptation optimization on different BIM platforms to ensure that the exported standardized format file can seamlessly connect with the requirements in the design, construction, and operation and maintenance stages. At the same time, store the optimized model in a shared platform for team collaboration and project management.

[0018] Preferably, the key geometric parameters labeled in Step 1 are related to the overall spatial layout of the building, and the geometric parameters satisfy the following relationship:

[0019] V = L × W × H,

[0020] where, V represents the volume of the entity model, L represents the length of the entity model, the unit is meter, W represents the width of the entity model, and H represents the height of the entity model;

[0021] The volume V among the geometric parameters is used to determine the material requirements of the building component. The material properties include density ρ and bearing capacity F, and they satisfy the following relationship:

[0022] F = ρ·g·V,

[0023] where ρ represents the density of the material, g represents the acceleration due to gravity, F represents the self-weight of the component, and V represents the volume of the solid model.

[0024] Preferably, the solid model constructed by using the BIM modeling tool in step 2 includes the node information and topological relationship of the key components. The node information is used to record the geometric position, and the topological relationship is used to define the relative spatial layout between the components;

[0025] The topological relationship includes the boundary connection method of the solid model, and the boundary connection satisfies the following constraint conditions:

[0026]

[0027] where F ij represents the i-th connection force acting on component j, R j represents the bearing capacity of component j, and n is the total number of connection points.

[0028] Preferably, the geometric constraints defined in step 3 include axis alignment and angle limitation. Axis alignment is used to ensure that the components are arranged in a consistent manner, and angle limitation is used to control the included angle between adjacent components within the design range;

[0029] The distance constraint includes the minimum distance d min and the maximum distance d min , and they satisfy the following relationship:

[0030] d min ≤ d ≤ d max ,

[0031] where d represents the actual distance between adjacent components, and d min and d max are the minimum and maximum allowable distances specified by the design.

[0032] Preferably, the structural stability of the global constraint in step 4 is limited by the displacement Δx of the node, and it satisfies the following relationship:

[0033] Δx ≤ Δx max ,

[0034] where Δx represents the actual displacement of the node, and Δx max represents the maximum allowable displacement;

[0035] The material properties in the global constraint include the coefficient of thermal expansion α, and they satisfy the following formula:

[0036] ΔL = α·L·ΔT,

[0037] where ΔL represents the change in length of the material due to temperature change, α represents the coefficient of thermal expansion of the material, and ΔT represents the temperature change.

[0038] Preferably, the optimized building information model in step 6 includes parameter annotation information, topological relationships, and global constraint logic, and is exported in IFC standard format to support subsequent design, construction, and operation and maintenance collaboration;

[0039] The geometric data included in the IFC standard format file includes the identifiers, node coordinates, and boundary conditions of each component, and the geometric data can be losslessly imported and processed by different BIM software.

[0040] Preferably, the boundary conditions in the geometric data describe the interaction methods between components, including fixed connections, hinged connections, and sliding connections, and the boundary conditions are defined by the following formula:

[0041]

[0042] where R k represents the reaction force of constraint of component k, F ki represents the i-th external force acting on component k, F ki represents the internal force generated by component k due to connection restrictions, and m is the total number of forces F ki involved;

[0043] The fixed connection in the boundary conditions is used to describe the relationship between components without relative movement, the hinged connection is used to describe the rotatable relationship between components, and the sliding connection is used to describe the relationship allowing movement along a certain direction.

[0044] Preferably, the optimized building information model supports the energy consumption analysis function, and the energy consumption analysis is based on the following formula:

[0045]

[0046] where E represents the total energy consumption of the model, P i represents the power of the i-th device, t i represents the operating time of the i-th device, and n represents the total number of devices;

[0047] The energy consumption analysis results are used to optimize the device layout and material selection in the model to meet the requirements of energy-saving design specifications.

[0048] Preferably, the optimized building information model supports the analysis of structural mechanical properties, and the structural mechanical properties are defined by the following formula:

[0049]

[0050] Among them, σ represents the stress of the material, F represents the external force acting on the component, A represents the cross-sectional area of the component, ε represents the strain of the component, ΔL represents the change in the length of the component, and L represents the original length of the component.

[0051] Preferably, the optimized building information model includes progress management data in the construction stage, and the progress management data includes the construction sequence, expected completion time, and related resource allocation information of each component;

[0052] The optimized building information model includes maintenance data in the operation and maintenance stage, and the maintenance data includes the service life, inspection cycle, and real-time monitoring parameters of the component, which are used to support the subsequent building life cycle management.

[0053] The present invention provides a parametric BIM modeling method. It has the following beneficial effects:

[0054] 1. The present invention proposes a parametric BIM modeling solution, which can dynamically generate and modify a three-dimensional BIM model by modifying geometric parameters. The introduction of parametric logic makes the model construction more flexible and efficient, realizes the automatic adjustment and rapid iteration of the model, and significantly improves the reusability of BIM modeling and the design efficiency of the building model.

[0055] 2. The present invention realizes the three-dimensional construction of the model in the way of constructing lines from points, enclosing lines into surfaces, and sweeping surfaces into solids according to basic geometric principles. At the same time, by setting geometric constraint conditions between points, lines, and surfaces, the constraints are associated with parameters to ensure that the model can be adjusted in real time according to parameter changes.

[0056] 3. The present invention defines geometric constraints, distance constraints, and connection constraints between solid models, and adds structural stability constraints, material property constraints, and functional requirement constraints globally. The present invention ensures the logical consistency and overall coordination between component models, and realizes the high precision and flexibility of building model design.

[0057] 4. The present invention combines geometric parameter annotation, dynamic logic association, and parametric scripts. On the basis of ensuring design accuracy, it reduces the repetitive operations of traditional BIM modeling, improves design efficiency. At the same time, the standardized BIM model output supports multi-platform collaboration and sharing, greatly improving the applicability and usability of the model. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Figure 1 is a flowchart of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0059] To enable those skilled in the art to understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, rather than all, of the embodiments of the present invention. Based on the embodiments of the present invention, other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present invention.

[0060] The following makes a detailed description of the present invention in conjunction with the accompanying drawings:

[0061] Embodiment:

[0062] Please refer to the attached Figure 1 , the embodiment of the present invention provides a parametric BIM modeling method, including:

[0063] Step 1: Obtain the specific design parameters of the modeling objects in the project design requirements, and mark the key geometric parameters of the objects, including length, width, height, volume and material characteristics, and clarify the unit, physical meaning and applicable range of the parameters during the marking process to provide a basis for the subsequent construction of the solid model;

[0064] Step 2: Based on the geometric parameters marked in Step 1, use a BIM modeling tool to construct a solid model. Among them, the solid model is a visual model that defines the shape, size and position through geometric parameters in a three-dimensional space. The geometric features of the solid model and the design parameters are synchronously updated through dynamic association to adapt to parameter changes;

[0065] Step 3: On the basis of the solid model constructed in Step 2, define the constraint relationships between the solid models. The constraint relationships include geometric constraints, distance constraints and connection constraints, and ensure the logical association and spatial coordination between the models by adding constraint relationships;

[0066] Step 4: On the basis of the constraint relationships defined in Step 3, further add global constraint conditions. The global constraints include structural stability constraints, material property constraints and functional requirement constraints to ensure the overall consistency and functional integrity of the model;

[0067] Step 5: Combine the global constraints in Step 4 to comprehensively verify the solid model, parameter marking and constraint relationships, confirm the correctness of the geometric data and parameter logic of the model, and use the building information model that passes the verification as the final result. The building information model includes geometric data, parameter marking information and constraint logic, and is exported as a standardized format file that supports cross-platform operations;

[0068] Step 6: Based on the building information model generated in Step 5, conduct interactive tests and adaptation optimizations on different BIM platforms to ensure that the exported standardized format files can seamlessly connect with the requirements in the design, construction, and operation and maintenance phases. At the same time, store the optimized model in a shared platform for team collaboration and project management.

[0069] Benefits of Step 1: Obtain the specific design parameters of the modeling objects in the project design requirements, mark the key geometric parameters of the objects, clarify the unit, physical meaning, and applicable scope of the parameters, provide accurate and clear basic data for subsequent modeling, provide a standardized parameter annotation method, ensure the traceability and consistency of the parameters, and avoid data chaos in the design process.

[0070] Benefits of Step 2: Based on the geometric parameters marked in Step 1, use BIM modeling tools to construct an entity model. Intuitively present the shape, size, and position of the components through a three-dimensional visualization model, enabling designers to understand and optimize the design scheme, dynamically associate geometric features and design parameters, and achieve synchronous updates of the model, improving the efficiency and flexibility of model adjustment.

[0071] Benefits of Step 3: Based on the entity model constructed in Step 2, define the constraint relationships between entity models to ensure the correctness of the logical relationships between entity models, improve the accuracy and rationality of the model, and avoid design conflicts and structural problems in the actual construction phase.

[0072] Benefits of Step 4: Based on the constraint relationships defined in Step 3, further add global constraint conditions. Enhance the safety of the building model through structural stability constraints to ensure that the model meets the mechanical performance requirements. Add material property constraints and functional requirement constraints to make the model close to the actual application requirements, ensure the coordination and integrity of the overall model, and lay a foundation for subsequent performance analysis and optimization.

[0073] Benefits of Step 5: Combine the global constraints in Step 4 to comprehensively verify the entity model, parameter annotation, and constraint relationships to ensure that the generated building information model is completely matched in terms of geometric data, parameter logic, and constraint conditions, avoid potential design and construction problems, and through the export of standardized format files, the model can be shared and operated on different BIM platforms, improving the efficiency of collaborative work.

[0074] Benefits of Step 6: Based on the building information model generated in Step 5, conduct interactive tests and adaptation optimizations on different BIM platforms. Through cross-platform testing and optimization, ensure the universality and compatibility of the model, meet the application scenarios of multiple stages and multiple requirements, store the optimized model in a shared platform, achieve team collaboration, and improve the efficiency of project management and the reliability of information sharing.

[0075] In summary, the parametric BIM modeling method provided by the present invention has the following comprehensive benefits:

[0076] Significantly reduce manual operations and improve modeling efficiency through parameter annotation, dynamic association, and automated adjustment.

[0077] Add constraint relationships and global conditions to ensure the logical consistency and performance reliability of the model.

[0078] Support dynamic modification and rapid iteration of the model to meet the changes in different project requirements.

[0079] The standardized model format supports multi-platform collaboration and full-life cycle applications, including the design, construction, and operation and maintenance phases.

[0080] Achieve information synchronization and seamless collaboration among team members through a shared platform.

[0081] This method effectively solves the problems of low efficiency, poor flexibility, and inability to share data in traditional BIM modeling, providing efficient and reliable technical support for construction projects.

[0082] The key geometric parameters marked in Step 1 are related to the overall spatial layout of the building, and the geometric parameters satisfy the following relationship:

[0083] V = L × W × H,

[0084] where V represents the volume of the solid model, L represents the length of the solid model in meters, W represents the width of the solid model, and H represents the height of the solid model;

[0085] The volume V in the geometric parameters is used to determine the material requirements of building components. The material properties include density ρ and bearing capacity F, and they satisfy the following relationship:

[0086] F = ρ · g · V,

[0087] where ρ represents the density of the material, g represents the acceleration due to gravity, F represents the self-weight of the component, and V represents the volume of the solid model.

[0088] Through the definition of geometric parameters, the spatial occupancy of building components can be accurately described, optimizing the overall spatial layout design. The parametric relationship ensures the logical consistency between geometric parameters and reduces design errors caused by manual input.

[0089] Based on volume and density, the mass of materials required for building components can be accurately calculated, avoiding waste or shortage of materials, determining the weight and bearing capacity of components in advance, and providing reliable data support for the determination of lifting equipment and mechanical calculations during the construction phase.

[0090] Through the calculation of bearing capacity, it is ensured that building components meet the mechanical requirements, preventing structural instability problems caused by insufficient materials or design errors. The changes in geometric parameters can update the material requirements and mechanical performance calculations in real time, ensuring the matching of the model with the actual requirements.

[0091] The correlation relationships of volume, length, width, and height simplify the process of model construction. Modifying any parameter can achieve the dynamic adjustment of the model. The application of parametric formulas enables designers to quickly evaluate the feasibility of different design schemes, reducing the trial-and-error time.

[0092] In summary, by defining the relationship between key geometric parameters and the overall spatial layout of the building, combining material properties such as volume, density, and bearing capacity, the present invention provides an efficient and scientific modeling method. Its main advantages include:

[0093] Ensuring that the component design meets the overall building space requirements.

[0094] Precisely calculating the material requirements, reducing waste, and improving resource utilization efficiency.

[0095] Combining mechanical performance analysis to enhance the bearing capacity and design rationality of building components.

[0096] The parametric relationships significantly reduce the complexity of model modification and design adjustment.

[0097] The modeling method based on parametric logic improves the efficiency of BIM modeling, ensuring the scientificity, economy, and reliability of the design, and providing strong technical support for the entire life cycle of building projects.

[0098] The solid model constructed using the BIM modeling tool in Step 2 contains the node information and topological relationships of key components. The node information is used to record the geometric positions, and the topological relationships are used to define the relative spatial layout between components;

[0099] The topological relationships include the boundary connection methods of the solid model, and the boundary connections satisfy the following constraint conditions:

[0100]

[0101] Among them, F ij represents the i-th connection force acting on component j, R j represents the bearing capacity of component j, and n is the total number of connection points.

[0102] By recording the geometric positions of components through node information, it is ensured that the positions of components in the three-dimensional space are accurate, avoiding position deviations from affecting the overall design. The parametric management of node information supports the dynamic position adjustment of model components, meeting the changes in design requirements. The standardized recording of node information enables information sharing between different design modules or teams, promoting collaborative design.

[0103] The topological relationship defines the relative spatial positions and interaction relationships between components, optimizes the spatial rationality of architectural design, quickly detects component conflict problems in the design through the topological relationship, avoids rework caused by design errors in the later construction stage, and ensures the correctness of the logical relationship between components.

[0104] Through the definition of boundary connection methods and constraint conditions, the force conditions of components at the connection points can be accurately calculated, ensuring the rationality and uniformity of force distribution. In the constraint conditions, the connection force is associated with the bearing capacity of the component, avoiding the force at the connection point exceeding the bearing limit of the component and potential structural instability problems. By representing the total number of connection points with parameters, the force distribution in the case of multi-point connection can be dynamically evaluated to meet the mechanical analysis requirements of complex components.

[0105] The parametric definition of node information and topological relationship realizes the automatic generation of the relationship between model components, reduces the manual adjustment workload. When any node or connection method is modified, the topological relationship is automatically updated, supporting rapid iterative design and improving design efficiency. The data form of the parametric topological relationship is standardized, supporting format files on multiple platforms and realizing the efficient circulation of information.

[0106] In summary, the present invention provides technical support with clear structural logic and reasonable spatial layout for BIM modeling by defining node information and topological relationship in the solid model. The specific benefits include:

[0107] Through node information management, ensure that the spatial positions of components are correct and dynamically adjustable.

[0108] Utilize boundary connection methods and constraint conditions to ensure the rationality of the force at the connection points of components and improve structural safety.

[0109] Parametric management supports the automatic generation of topological relationships and rapid scheme adjustment, reducing design complexity.

[0110] This method improves the accuracy and efficiency of BIM modeling through the combination of node information and topological relationship, ensures the safety and operability of architectural design, and lays a foundation for the full life cycle management of complex building projects.

[0111] The geometric constraints defined in step 3 include axis alignment and angle limitation. Axis alignment is used to ensure that components are arranged consistently, and angle limitation is used to control the included angle between adjacent components within the design range;

[0112] The distance constraint includes the minimum distance d min and the maximum distance d min , satisfying the following relationship:

[0113] d min ≤d≤d max ,

[0114] Among them, d represents the actual distance between adjacent components, d min and d max are the minimum and maximum allowable distances specified by the design.

[0115] Through the axis alignment constraint, ensure that the components are arranged on the same axis, reduce the alignment deviation, and guarantee the accuracy of the building design. The axis alignment of the components helps to optimize the building space layout, make the space division more reasonable, and improve the functionality of the building. By controlling the angle between adjacent components within the design range, ensure that the design meets the requirements of the building code. The reasonable angle limit makes the building design more harmonious, enhancing the overall aesthetics and coordination.

[0116] The minimum distance constraint ensures that there is enough space between adjacent components, avoiding problems such as component overlap or physical conflict. The maximum distance limits the distance between components, ensuring that the components are arranged compactly, improving the utilization rate of the building space. By defining the distance constraint, the actual distance between components can be adjusted in real time according to the parametric logic to adapt to different design requirements.

[0117] Through the parametric definition of geometric constraints and distance constraints, automatically achieve component arrangement, angle control, and spacing adjustment, reducing the manual setting workload. The dynamic association of geometric parameters ensures that the constraint conditions always meet the design requirements, reducing the errors caused by manual operations. When modifying the position or parameters of the components, the constraint relationship is automatically updated, supporting the rapid adjustment and optimization of the design scheme.

[0118] The minimum value of the distance constraint ensures the safety spacing between components, avoiding structural hidden dangers caused by too close contact. The combination of geometric constraints and distance constraints makes the component arrangement more reasonable, contributing to the realization of lighting and ventilation function requirements.

[0119] In summary, the present invention provides an efficient and accurate component control method for BIM modeling by defining geometric constraints and distance constraints. The specific benefits include:

[0120] Geometric constraints ensure consistent component arrangement, and distance constraints ensure reasonable component spacing, enhancing the standardization and accuracy of the design.

[0121] The parametric constraint relationship reduces the complexity of manual adjustment and realizes automated modeling.

[0122] Dynamically adjust the distance and angle between components, supporting the rapid iteration of various design requirements.

[0123] The reasonable constraint design improves the space utilization rate and overall aesthetics, and at the same time, meets the building function requirements.

[0124] Through the combination of geometric constraints and distance constraints, the present invention significantly improves the efficiency, flexibility, and accuracy of BIM modeling, providing reliable support for the design and implementation of construction projects.

[0125] In step 4, the structural stability of the global constraint is defined by the displacement Δx of the node, satisfying the following relationship: Δx ≤ Δx max ,

[0126] where Δx represents the actual displacement of the node, and Δx max represents the maximum allowable displacement;

[0127] The material properties in the global constraint include the coefficient of thermal expansion α, satisfying the following formula:

[0128] ΔL = α·L·ΔT,

[0129] where ΔL represents the change in length of the material due to temperature change, α represents the coefficient of thermal expansion of the material, and ΔT represents the temperature change.

[0130] The present invention provides the following significant advantages for the building model through the structural stability and material property constraints in the global constraint:

[0131] Strict restrictions on the node displacement amount avoid structural instability or damage, enhancing the safety of the building.

[0132] The combination of the coefficient of thermal expansion and the temperature change helps optimize material selection and design, enhancing the reliability of the model.

[0133] Through the thermal expansion constraint, it provides a scientific basis for the building to adapt to environmental temperature differences.

[0134] The parametric logic of the global constraint supports rapid iteration and optimization, adapting to complex engineering requirements.

[0135] Through the definition of the structural stability and material properties of the global constraint, the present invention significantly improves the safety, durability, and adaptability of the building model, providing technical support for efficient and reliable BIM modeling.

[0136] The optimized building information model supports the energy consumption analysis function, and the energy consumption analysis is based on the following formula:

[0137]

[0138] where E represents the total energy consumption of the model, P i represents the power of the i-th device, t i represents the operating time of the i-th device, and n represents the total number of devices;

[0139] The energy consumption analysis results are used to optimize the device layout and material selection in the model to meet the requirements of energy-saving design specifications.

[0140] The optimized building information model supports energy consumption analysis functions, significantly improving the energy-saving performance and design efficiency of building projects, as specifically reflected in the following aspects:

[0141] By analyzing the equipment power and operation time, accurately evaluate the total building energy consumption, providing a scientific basis for energy-saving optimization.

[0142] Guide the equipment layout and material selection to ensure that the design meets the energy-saving specifications, improving the building functionality and space utilization rate.

[0143] Supported by energy consumption data, meet the green building standards and contribute to sustainable development.

[0144] Dynamically optimize during the design, construction and operation and maintenance stages to reduce energy consumption and operation costs.

[0145] The energy consumption analysis function of the present invention effectively promotes the application of energy-saving design in the building information model, providing technical support for energy conservation, emission reduction and sustainable development.

[0146] The optimized building information model in step 6 includes parameter annotation information, topological relationships and global constraint logics, and is exported in the IFC standard format to support subsequent design, construction and operation and maintenance collaborations;

[0147] The geometric data included in the IFC standard format file includes the identifiers, node coordinates and boundary conditions of each component, and the geometric data can be losslessly imported and processed by different BIM software.

[0148] The boundary conditions in the geometric data describe the interaction modes between components, including fixed connections, hinged connections and sliding connections, and the boundary conditions are defined by the following formula:

[0149]

[0150] Among them, R k represents the reaction force of the constraint of component k, F ki represents the i-th external force acting on component k, F ki represents the internal force generated by component k due to connection restrictions, and m is the total number of forces F ki involved;

[0151] The fixed connection in the boundary conditions is used to describe the relationship between components without relative movement, the hinged connection is used to describe the rotatable relationship between components, and the sliding connection is used to describe the relationship allowing movement along a certain direction.

[0152] The optimized building information model supports structural mechanics performance analysis, and the structural mechanics performance is defined by the following formula:

[0153]

[0154] Among them, σ represents the stress of the material, F represents the external force acting on the component, A represents the cross-sectional area of the component, ε represents the strain of the component, ΔL represents the change in the length of the component, and L represents the original length of the component.

[0155] The optimized building information model contains progress management data in the construction stage. The progress management data includes the construction sequence, expected completion time, and relevant resource allocation information of each component.

[0156] The optimized building information model contains maintenance data in the operation and maintenance stage. The maintenance data includes the service life, inspection cycle, and real-time monitoring parameters of the components, which are used to support subsequent building life cycle management.

[0157] The model integrates parameter annotation information, topological relationships, and global constraint logic to ensure that the building information model has comprehensive geometric data and logical associations, reducing design omissions and conflicts.

[0158] The dynamic update of parameter annotation information combined with topological relationships and global constraints enables the model to quickly adapt to design changes and improve the adjustment efficiency.

[0159] Through the IFC standard format, it ensures the lossless sharing and compatibility of geometric data among different BIM software, supporting collaboration among multiple teams and multiple stages.

[0160] The identifiers, node coordinates, and boundary conditions in the geometric data provide an accurate data basis for cross-platform collaboration, enhancing information flow among teams.

[0161] By defining fixed connections, hinged connections, and sliding connections, it meets the diverse connection requirements between different components and improves the design flexibility of the building structure.

[0162] The results of mechanical property analysis provide a scientific basis for adjusting the cross-sectional area and material selection of components, reducing material waste and ensuring the economy of the design.

[0163] By clarifying the construction sequence and expected completion time, optimizing the construction plan, and reducing construction delays, the resource allocation information included in the progress management data helps to improve the utilization efficiency of construction resources and reduce costs.

[0164] In summary, through the optimized building information model, the present invention realizes the integration of parameter annotation information, topological relationships, and global constraint logic, and supports multiple functions such as cross-platform collaboration, mechanical property analysis, construction progress management, and operation and maintenance management. The advantages include:

[0165] Integrating key parameters, topological relationships, and global constraint logic to ensure the integrity and accuracy of building model data.

[0166] Implement lossless data sharing based on the IFC standard format, supporting collaborative work among multiple teams and multiple stages.

[0167] Ensure the safety and rationality of building structures through mechanical property analysis and boundary condition definition.

[0168] Cover the data requirements of each stage of design, construction, and operation and maintenance, and achieve efficient management from the construction to the maintenance of buildings.

[0169] This method significantly improves the accuracy, flexibility, and applicability of building information models, providing strong support for realizing intelligent and sustainable building management.

[0170] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A parametric BIM modeling method, characterized in that: include: Step 1: Obtain the specific design parameters of the modeling object in the project design requirements, mark the key geometric parameters of the object, including length, width, height, volume and material properties, and clarify the unit, physical meaning and applicable scope of the parameters during the marking process to provide a basis for the subsequent solid model construction; Step 2: Based on the geometric parameters marked in step 1, a physical model is constructed using a BIM modeling tool. The physical model is a visual model that uses geometric parameters to specify shape, size, and position in three-dimensional space. The geometric features of the physical model are dynamically associated with the design parameters to achieve synchronous update in order to adapt to parameter changes. Step 3: Based on the entity model constructed in step 2, define the constraint relationship between the entity models, wherein the constraint relationship includes geometric constraint, distance constraint and connection constraint, and the logical association and spatial coordination between the models are ensured by adding the constraint relationship; Step 4: Based on the constraint relationship defined in step 3, further add global constraint conditions, wherein the global constraint includes structural stability constraint, material property constraint and functional requirement constraint to ensure the overall consistency and functional integrity of the model; Step 5: Combined with the global constraints of step 4, the entity model, parameter annotation and constraint relationship are comprehensively verified to confirm the correctness of the geometric data and parameter logic of the model, and the verified building information model is used as the final result. The building information model includes geometric data, parameter annotation information and constraint logic, and is exported as a standardized format file that supports cross-platform operations; Step 6: Based on the building information model generated in step 5, interactive testing and adaptation optimization are carried out on different BIM platforms to ensure that the exported standardized format files can be seamlessly connected with the needs of the design, construction and operation and maintenance stages. At the same time, the optimized model is stored in a shared platform for team collaboration and project management.

2. A parametric BIM modeling method according to claim 1, characterized in that: The key geometric parameters marked in step 1 are related to the overall spatial layout of the building, and the geometric parameters satisfy the following relationship: V=L×W×H, Wherein, V represents the volume of the entity model, L represents the length of the entity model in meters, W represents the width of the entity model, and H represents the height of the entity model; The volume V in the geometric parameters is used to determine the material requirements of the building components. The material properties include density ρ and bearing capacity F, which satisfy the following relationship: F=ρ·g·V, Among them, ρ represents the density of the material, g represents the acceleration of gravity, F represents the self-weight of the component, and V represents the volume of the solid model.

3. A parametric BIM modeling method according to claim 1, characterized in that: The entity model constructed by using the BIM modeling tool in step 2 includes node information and topological relationships of key components, the node information is used to record geometric positions, and the topological relationships are used to define the relative spatial layout between components; The topological relationship includes the boundary connection mode of the entity model, and the boundary connection satisfies the following constraints: Among them, F ij represents the i-th connection force acting on component j, R j represents the bearing capacity of component j, and n is the total number of connection points.

4. A parametric BIM modeling method according to claim 1, characterized in that: The geometric constraints defined in step 3 include axis alignment and angle restriction. The axis alignment is used to ensure that the components are arranged in a consistent manner, and the angle restriction is used to control the angle between adjacent components within the design range. The distance constraint includes a minimum distance d min and the maximum distance d min , satisfying the following relationship: d min ≤d≤d max , Where d represents the actual distance between adjacent components, d min and d max The minimum and maximum allowable distances specified for the design.

5. A parametric BIM modeling method according to claim 1, characterized in that: The structural stability of the global constraint in step 4 is defined by the displacement Δx of the node, satisfying the following relationship: Δx≤Δx max , Where Δx represents the actual displacement of the node, Δx max Indicates the maximum displacement allowed; The material properties in the global constraints include the thermal expansion coefficient α, which satisfies the following formula: ΔL=α·L·ΔT, Among them, ΔL represents the length change of the material due to temperature change, α represents the thermal expansion coefficient of the material, and ΔT represents the temperature change.

6. A parametric BIM modeling method according to claim 1, characterized in that: The optimized building information model in step 6 includes parameter annotation information, topological relationships and global constraint logic, and is exported in the IFC standard format to support subsequent design, construction and operation and maintenance collaboration; The geometric data contained in the IFC standard format file includes identifiers, node coordinates and boundary conditions of each component, and the geometric data can be losslessly imported and processed through different BIM software.

7. A parametric BIM modeling method according to claim 6, characterized in that: The boundary conditions in the geometric data describe the interaction between components, including fixed connections, hinged connections and sliding connections. The boundary conditions are defined by the following formula: Among them, R k represents the restraint reaction force of component k, F ki represents the i-th external force acting on component k, F ki represents the internal force of member k due to the connection restriction, and m is the force involved F ki Total number of Among the boundary conditions, a fixed connection is used to describe a relationship between components without relative motion, a hinged connection is used to describe a rotatable relationship between components, and a sliding connection is used to describe a relationship that allows movement in a certain direction.

8. A parametric BIM modeling method according to claim 1, characterized in that: The optimized building information model supports energy consumption analysis function, and the energy consumption analysis is based on the following formula: Where E represents the total energy consumption of the model, P i represents the power of the ith device, t i represents the running time of the i-th device, and n represents the total number of devices; The energy consumption analysis results are used to optimize the equipment layout and material selection in the model to meet the requirements of energy-saving design specifications.

9. A parametric BIM modeling method according to claim 6, characterized in that: The optimized building information model supports the analysis of structural mechanical properties, which are defined by the following formula: Among them, σ represents the stress of the material, F represents the external force acting on the component, A represents the cross-sectional area of ​​the component, ε represents the strain of the component, ΔL represents the change in the length of the component, and L represents the original length of the component.

10. A parametric BIM modeling method according to claim 6, characterized in that: The optimized building information model includes progress management data of the construction phase, and the progress management data includes the construction sequence of each component, the expected completion time and related resource allocation information; The optimized building information model contains maintenance data for the operation and maintenance phase, and the maintenance data includes the service life, maintenance cycle and real-time monitoring parameters of the components, which are used to support the subsequent full life cycle management of the building.

Images