A method and system for designing prefabricated buildings based on BIM

Abstract

The present invention discloses a prefabricated building design method and system based on BIM, which relates to the technical field of prefabricated building design, and solves the technical problem that it does not help the prefabricated building design and cannot select the assembly method in combination with the prefabricated building's own data, thus affecting the overall assembly efficiency. The present invention splits the overall model of the prefabricated building, further analyzes the prefabricated modules after the split, analyzes based on the connection methods corresponding to the assembly parts, comprehensively considers and selects the appropriate connection methods, and can standardize the connection methods of the assembly parts on the one hand, thereby saving the time of subsequent overall installation and improving the overall assembly efficiency. On the other hand, by analyzing the connection methods and combining the comprehensive analysis and processing with the parameters of the assembly parts themselves, it can meet the assembly requirements while meeting the actual situation, and further improve the overall assembly efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of prefabricated building design, and in particular to a prefabricated building design method and system based on BIM. Background Art

[0002] BIM (Building Information Modeling) uses the relevant information data of the construction project as the basis of the model to establish the building model, and simulates the real information of the building through digital information simulation.

[0003] According to Chinese patent application number CN202311201147.2, a BIM-based prefabricated building design method is disclosed. Aiming at the problems that the existing BIM-based prefabricated building design method process is not clear enough and the utilization is not comprehensive, the method includes the following steps: S1. Obtaining drawing design information, S2. Building a virtual building, S3. Standardized design, S4. Splitting prefabricated components, S5. Dynamically simulating construction methods, S6. Optimizing overall design. The present invention has strong relevance and openness, which not only helps to improve the design efficiency of prefabricated buildings, realize standardized design of components and reduce design errors, but also helps to optimize and deeply optimize design schemes, improve construction efficiency, and can adjust needs in time, convert information into construction parameters, thereby realizing the connection between design information and prefabricated components.

[0004] When some existing prefabricated building design systems are used, when using BIM model analysis, they are often used for reference analysis and do not help the prefabricated building design. At the same time, when the system is in use, it cannot combine the prefabricated building's own data to select the corresponding assembly method, which affects the overall assembly efficiency. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a BIM-based prefabricated building design method and system, which solves the problem that it does not help the prefabricated building design and cannot select the assembly method based on the prefabricated building's own data, thereby affecting the overall assembly efficiency.

[0006] To achieve the above objectives, the present invention is implemented through the following technical scheme: The method specifically comprises the following steps:

[0007] Step 1: Acquire the overall model of the prefabricated building, split the model into modules to obtain prefabricated modules, and analyze and process the assembly parts of the prefabricated modules to obtain module assembly parts information;

[0008] Step 2: Obtain the connection mode of the assembly parts corresponding to the assembled module, select the standard connection mode according to the number of assembly parts corresponding to different connection modes, and classify the assembly parts according to the standard connection mode to obtain connection classification information, wherein the connection classification information includes: matching assembly parts and non-matching assembly parts;

[0009] Step 3: Process the obtained connection classification information, analyze the connection mode for the unmatched assembly parts, reselect the connection mode to generate pre-selected connection mode information, and obtain the secondary assembly parts according to the pre-selected connection mode information;

[0010] Step 4: Analyze the matching assembly parts and secondary assembly parts, generate assembly sequence through BIM model analysis, and generate design information based on assembly requirements;

[0011] Step 5: Process the obtained assembly parts to be analyzed, and determine whether the connection mode needs to be adjusted by analyzing the connection modes of adjacent assembly parts to be analyzed, and generate corresponding adjustment information according to the influence of the connection mode.

[0012] As a further solution of the present invention: the specific method of obtaining the module assembly information in step 1 is:

[0013] The prefabricated building model is obtained, and the obtained building model is split to obtain multiple groups of prefabricated modules, which are labeled i, and i=1, 2, ..., j, where j represents the number of prefabricated modules. Then, the assembly parts corresponding to the prefabricated module i are obtained, and the assembly parts classification information is obtained by classifying them according to their shapes. At the same time, the number of assemblies corresponding to the classification information of the same type of assembly parts is obtained. Then, the number of assemblies of the same type corresponding to the overall prefabricated building is obtained, and the module assembly parts information is generated.

[0014] As a further solution of the present invention: the specific method of selecting the standard connection method in step 2 is:

[0015] Get any group of prefabricated modules and record them as target objects. Get the connection methods corresponding to the target objects and label them as a, where a=1, 2, ..., b, where b represents the number of connection methods. Then get the number of assemblies corresponding to connection method a and sort connection methods a from large to small according to the number of assemblies. Similarly, perform the same processing on all prefabricated modules and select the connection method corresponding to the largest number of assemblies as the standard connection method.

[0016] As a further solution of the present invention: In step 2, the specific method of classifying the assembly parts in the standard connection mode to obtain the connection classification information is:

[0017] Obtain the standard connection method, and match the connection method corresponding to the assembly with the standard connection method. If the connection method of the assembly includes the standard connection method, the corresponding assembly is classified as a matching assembly. Otherwise, if the connection method of the assembly does not include the standard connection method, the corresponding assembly is classified as an unmatched assembly, and connection classification information is generated.

[0018] As a further solution of the present invention: the specific method of generating the pre-selected connection mode information in step 3 is:

[0019] Get all the unmatched assemblies and label them as n, where n=1, 2, ..., m. At the same time, get the connection mode a corresponding to the unmatched assembly n, and get the connection duration Ta and connection strength Qa corresponding to the connection mode a. Then substitute the obtained parameters into the formula The comprehensive value Pa corresponding to connection mode a is calculated, where Ta is the average value. It is a preset proportional coefficient, and the specific value is set by the operator;

[0020] Then, the connection mode corresponding to the maximum comprehensive value of assembly n is selected and recorded as the connection mode to be analyzed. At the same time, the analysis is performed based on the connection mode to be analyzed. If there is an assembly that matches the connection mode to be analyzed, the corresponding assembly will be marked as a pre-selected assembly. At the same time, the quantity corresponding to the pre-selected assembly is obtained, and the quantity proportion of the pre-selected assembly is calculated. The quantity proportion is compared with the threshold value. If the quantity proportion is greater than the threshold value, the pre-selected connection mode information is generated based on the connection mode to be analyzed, and the corresponding pre-selected assembly is marked as a secondary assembly. If the quantity proportion is less than the threshold value, a secondary analysis signal is generated. Otherwise, if there is no assembly that matches the connection mode to be analyzed, a secondary analysis signal is generated.

[0021] As a further solution of the present invention: the specific method of processing the secondary analysis signal in step 3 is:

[0022] Analyze from large to small comprehensive values, select the corresponding pre-selected assemblies, calculate the quantity percentage of the pre-selected assemblies, and then compare the quantity percentage with the threshold value, and so on to obtain the pre-selected connection method information and the secondary assemblies.

[0023] As a further solution of the present invention: the specific method of generating the design information in step 4 is:

[0024] Obtain all matching assemblies and secondary assemblies, and the corresponding BIM building model, generate the assembly sequence of the matching assemblies and secondary assemblies based on the BIM building model, then obtain the actual assembly requirements, and based on the actual assembly requirements, label the assemblies that need to be adjusted as assemblies to be analyzed, and combine the actual assembly requirements with the assemblies to be analyzed to generate design information.

[0025] As a further solution of the present invention: the specific method of generating the adjustment information in step 5 is:

[0026] Obtain all the assemblies to be analyzed, and at the same time obtain the corresponding assembly sequence numbers, then analyze the assemblies to be analyzed according to the assembly sequence numbers from small to large, obtain the assemblies to be analyzed with adjacent assembly sequence numbers and record them as adjacent assemblies, and do not process the assemblies to be analyzed without adjacent assembly sequence numbers, and generate normal assembly results, obtain the connection methods corresponding to the adjacent assemblies, and determine whether the connection methods are the same. If the connection methods are the same, do not process them and generate normal assembly results. If the connection methods are different, generate an impact judgment signal;

[0027] Obtain the comprehensive values ​​corresponding to adjacent assembly parts, and select the connection mode corresponding to the maximum comprehensive value as the connection mode to be adjusted. At the same time, judge the influence of the connection mode to be adjusted. The specific judgment method is: obtain the connection strength of the connection mode to be adjusted, and judge the change of the connection strength. If the connection strength increases, the adjustment result is generated based on the connection mode to be adjusted as the standard. If the connection strength decreases, it will not be processed and the normal assembly result will be generated.

[0028] A BIM-based prefabricated building design system, comprising an assembly information collection unit, an information processing and analysis unit, a connection mode selection unit, a comprehensive adjustment and analysis unit, and an information output unit;

[0029] An assembly information acquisition unit, which is used to acquire the assembled building model information and transmit the assembled building model information to the information processing and analysis unit;

[0030] An information processing and analysis unit, which is used to split the prefabricated building into prefabricated modules according to the obtained prefabricated building model information, and to analyze and process the assembly parts of the prefabricated modules to obtain module assembly part information, and at the same time transmit the module assembly part information to the connection mode selection unit;

[0031] A connection method selection unit, which is used to process the obtained module assembly information, obtain the connection method of the assembly parts corresponding to the assembled module, and select a standard connection method according to the number of assembly parts corresponding to different connection methods, and classify the assembly parts in the standard connection method to obtain connection classification information, wherein the connection classification information includes: matching assembly parts and non-matching assembly parts, process the obtained connection classification information, further analyze the connection method for non-matching assembly parts, reselect the connection method to generate pre-selected connection method information, and obtain secondary assembly parts according to the pre-selected connection method information, analyze the obtained matching assembly parts and secondary assembly parts, generate an assembly sequence through the BIM model, and generate design information in combination with assembly requirements, and transmit the generated design information to the comprehensive adjustment analysis unit;

[0032] A comprehensive adjustment analysis unit, which is used to analyze the acquired design information, process the obtained assembly parts to be analyzed, and determine whether the connection mode needs to be adjusted by analyzing the connection mode of adjacent assembly parts to be analyzed, and generate corresponding adjustment information according to the influence of the connection mode, and the adjustment information includes: mode adjustment result and normal assembly result, and then transmit the adjustment information to the information output unit;

[0033] An information output unit is used to display the acquired adjustment information to the corresponding operator. Beneficial Effects

[0034] The present invention provides a BIM-based prefabricated building design method and system. Compared with the prior art, it has the following beneficial effects:

[0035] The present invention splits the overall model of the prefabricated building, further analyzes the prefabricated modules after the split, analyzes based on the connection methods corresponding to the assembly parts, comprehensively considers and selects appropriate connection methods, and can, on the one hand, achieve standardization of the connection methods of the assembly parts, thereby saving time for subsequent overall installation and improving the overall assembly efficiency; on the other hand, by analyzing the connection methods and combining comprehensive analysis and processing with the parameters of the assembly parts themselves, it can meet the assembly requirements while fitting the actual situation, thereby further improving the overall assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a flow chart of the method of the present invention;

[0037] Figure 2 This is a system diagram of the present invention. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] For example, see Figure 1 The present application provides a method for designing prefabricated buildings based on BIM, which specifically includes the following steps:

[0040] Step 1: Obtain the overall model of the prefabricated building, split the model into modules to obtain prefabricated modules, and analyze and process the assembly parts of the prefabricated modules to obtain module assembly part information. The specific method of generating the module assembly part information is as follows:

[0041] First, the model of the entire prefabricated building is obtained, and the method of obtaining here is to obtain it through the corresponding BIM building model. At the same time, the obtained building model is split to obtain multiple groups of prefabricated modules, and the prefabricated modules are labeled as i, and i=1, 2, ..., j, where j represents the number of prefabricated modules, and the specific method of splitting here is split according to the position of different prefabricated modules. The specific splitting position method is set by the operator, and then the assembly parts corresponding to the prefabricated module i are obtained, and the assembly parts classification information is obtained according to the shape of the assembly parts. At the same time, the number of assembly parts corresponding to the classification information of the same type of assembly parts is obtained, and then the number of assembly parts of the same type corresponding to the overall prefabricated building is obtained, and the module assembly parts information is generated. Specifically, here, the number of assembly parts of the same type corresponding to one type of prefabricated module is first obtained, and then the number of the same type corresponding to all prefabricated modules is obtained by analogy.

[0042] Step 2: Obtain the connection mode of the assembly parts corresponding to the prefabricated module, and select the standard connection mode according to the number of assembly parts corresponding to different connection modes, and classify the assembly parts according to the standard connection mode to obtain connection classification information, wherein the connection classification information includes: matching assembly parts and unmatched assembly parts, and the specific method of generating the connection classification information is:

[0043] Get any group of prefabricated modules and record them as target objects, and get the connection methods corresponding to the target objects at the same time. The connection methods here represent all connection methods of the corresponding assemblies, such as riveting, bolting and snap-on connection, etc. The connection methods are labeled as a, and a=1, 2, ..., b, where b represents the number of connection methods. Then get the number of assemblies corresponding to connection method a, and the number of assemblies obtained here represents the number in the target object. At the same time, the same assembly may be selected repeatedly. For example, when one of the assemblies has two methods, bolting and riveting, in the analysis, it will be counted twice in the subsequent quantity statistics. At the same time, the connection method a is sorted from large to small according to the number of assemblies. Similarly, all prefabricated modules are processed in the same way, and the connection method corresponding to the largest number of assemblies is selected as the standard connection method. Specifically, the number of different connection methods corresponding to one group of prefabricated modules is first obtained, and then sorted. In the subsequent analysis process, other connection methods may be sorted and added, but they will not affect the overall situation. When selecting the standard connection method, the connection method with the largest number of assemblies is still selected.

[0044] For example, there are three connection methods, namely riveting, bolt fixing and snap connection, and the corresponding numbers of assembly parts for the three connection methods are 24, 37 and 15 respectively. Therefore, when sorting, bolt fixing is ranked first, followed by riveting, and finally snap connection. Later, when analyzing the overall connection method, a new connection method, welding, appeared, and the corresponding number is 20. Therefore, the corresponding order changes when sorting. The first is bolt fixing, the second is riveting, the third is welding, and the last is snap connection. Therefore, bolt fixing is selected as the standard connection method.

[0045] Then, the standard connection method is obtained, and the connection method corresponding to the assembly is matched with the standard connection method. If the connection method of the assembly includes the standard connection method, the corresponding assembly is classified as a matching assembly. Conversely, if the connection method of the assembly does not include the standard connection method, the corresponding assembly is classified as an unmatched assembly. The connection classification information is obtained based on the above assembly classification.

[0046] Step 3: Process the obtained connection classification information. For the unmatched assembly parts, further analyze the connection mode and reselect the connection mode to generate pre-selected connection mode information. Then, obtain the secondary assembly parts according to the pre-selected connection mode information. The specific method of generating the secondary assembly parts is as follows:

[0047] Get all the unmatched assemblies and label them as n, where n=1, 2, ..., m. At the same time, get the connection mode a corresponding to the unmatched assembly n, and get the connection time Ta and connection strength Qa corresponding to the connection mode a. The connection mode here is obtained by nonlinear finite element method. The specific analysis method is the existing technology and will not be described in detail here. At the same time, the connection time represents the time required to connect the assembly. Then substitute the obtained parameters into the formula The comprehensive value Pa corresponding to connection mode a is calculated, where Ta is the average value. It is a preset proportional coefficient, and the specific value is set by the operator;

[0048] Then, the connection mode corresponding to the maximum comprehensive value of the assembly n is selected and recorded as the connection mode to be analyzed. At the same time, the connection mode to be analyzed is used as the standard for analysis. If there is an assembly matching the connection mode to be analyzed, the corresponding assembly is marked as a pre-selected assembly. At the same time, the quantity corresponding to the pre-selected assembly is obtained, and the quantity ratio of the pre-selected assembly is calculated. The quantity ratio is compared with the threshold value, and the specific value of the threshold value is set by the operator. In this application, the value of the threshold value is 0.5. If the quantity ratio is greater than the threshold value, the pre-selected connection mode information is generated according to the connection mode to be analyzed, and the corresponding pre-selected assembly is marked as a secondary assembly. If the quantity ratio is less than the threshold value, a secondary analysis signal is generated. Otherwise, if there is no assembly matching the connection mode to be analyzed, a secondary analysis signal is generated.

[0049] The generated secondary analysis signal is processed in a specific manner: analysis is performed from large to small according to the comprehensive value, and the corresponding pre-selected assembly parts are screened and the quantity percentage of the pre-selected assembly parts is calculated. The quantity percentage value is then compared with the threshold value, and so on to obtain the pre-selected connection method information and obtain the secondary assembly parts. The analysis method here is the same as the above analysis, specifically, selection and analysis are performed in sequence according to the comprehensive value until the pre-selected connection method is selected. At the same time, it is assumed in this application that there is a corresponding pre-selected connection method when processing the secondary analysis signal.

[0050] Step 4: Analyze the matching assembly parts and secondary assembly parts, generate assembly sequence through BIM model analysis, and generate design information in combination with assembly requirements. The specific method of generating design information is as follows:

[0051] Obtain all matching assemblies and secondary assemblies, and the corresponding BIM building model, generate the assembly sequence of the matching assemblies and secondary assemblies based on the BIM building model, and then obtain the actual assembly requirements. The actual assembly requirements here mean that the corresponding wire layout and punching installation operations need to be considered during installation, and based on the actual assembly requirements, the assemblies that need to be adjusted are numbered as assemblies to be analyzed, and the actual assembly requirements are combined with the assemblies to be analyzed to generate design information.

[0052] Step 5: Process the obtained assembly parts to be analyzed, and determine whether the connection mode needs to be adjusted by analyzing the connection mode of adjacent assembly parts to be analyzed, and generate corresponding adjustment information according to the influence of the connection mode, and the specific method of generating the adjustment information is:

[0053] Obtain all the assemblies to be analyzed, and at the same time obtain the corresponding assembly sequence numbers, then analyze the assemblies to be analyzed according to the assembly sequence numbers from small to large, obtain the assemblies to be analyzed with adjacent assembly sequence numbers and record them as adjacent assemblies, and do not process the assemblies to be analyzed without adjacent assembly sequence numbers, and generate normal assembly results. Specifically, the absence of adjacent numbers indicates that the corresponding assemblies to be analyzed are not continuous, such as numbers 2, 5, and 13. Obtain the connection methods corresponding to the adjacent assemblies, and determine whether the connection methods are the same. If the connection methods are the same, do not process them, and generate normal assembly results. If the connection methods are different, generate an impact judgment signal;

[0054] Obtain the comprehensive values ​​corresponding to the adjacent assembly parts, and select the connection mode corresponding to the maximum comprehensive value as the connection mode to be adjusted, and judge the influence of the connection mode to be adjusted. The specific judgment method is: obtain the connection strength of the connection mode to be adjusted, and judge the change of the connection strength. If the connection strength increases, the adjustment result is generated with the connection mode to be adjusted as the standard. If the connection strength decreases, it is not processed and a normal assembly result is generated. Specifically, in the process of adjusting the connection mode, if the corresponding connection strength is greater than the connection strength after adjustment at the beginning, it means that the overall connection strength is reduced and no adjustment is required. Otherwise, it can be adjusted.

[0055] For example 2, please refer to Figure 2 , a BIM-based prefabricated building design system, the system specifically includes: an assembly information acquisition unit, an information processing and analysis unit, a connection method selection unit, a comprehensive adjustment and analysis unit and an information output unit.

[0056] An assembly information acquisition unit, which is used to acquire the assembled building model information and transmit the assembled building model information to the information processing and analysis unit;

[0057] An information processing and analysis unit, which is used to split the prefabricated building according to the obtained prefabricated building model information to obtain prefabricated modules, and analyze and process the assembly parts of the prefabricated modules to obtain module assembly part information, and transmit the module assembly part information to the connection mode selection unit. The specific method of generating the module assembly part information is the same as the analysis method of step 1 in embodiment 1;

[0058] A connection method selection unit, which is used to process the acquired module assembly information, acquire the connection method of the assembly parts corresponding to the assembled module, and select a standard connection method according to the number of assembly parts corresponding to different connection methods, and classify the assembly parts in the standard connection method to obtain connection classification information, wherein the connection classification information includes: matching assembly parts and unmatched assembly parts, process the obtained connection classification information, further analyze the connection method for unmatched assembly parts, reselect the connection method to generate pre-selected connection method information, and obtain secondary assembly parts according to the pre-selected connection method information, analyze the obtained matching assembly parts and secondary assembly parts, analyze and generate an assembly sequence through the BIM model, and generate design information in combination with assembly requirements, and transmit the generated design information to the comprehensive adjustment analysis unit. The specific processing method is the same as the analysis method of step 2, step 3 and step 4 in embodiment 1;

[0059] A comprehensive adjustment and analysis unit is used to analyze the acquired design information, process the obtained assembly parts to be analyzed, and determine whether the connection method needs to be adjusted by analyzing the connection methods of adjacent assemblies to be analyzed. At the same time, corresponding adjustment information is generated according to the influence of the connection method, and the adjustment information includes: method adjustment results and normal assembly results. The adjustment information is then transmitted to the information output unit, and the method of generating the adjustment information is the same as the analysis method of step five in Example 1.

[0060] An information output unit is used to display the acquired adjustment information to the corresponding operator.

[0061] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0062] The above embodiments are only used to illustrate the technical method of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical method of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical method of the present invention.

Claims

1. A BIM-based prefabricated building design method, characterized in that: The method specifically comprises the following steps: Step 1: Acquire the overall model of the prefabricated building, split the model into modules to obtain prefabricated modules, and analyze and process the assembly parts of the prefabricated modules to obtain module assembly parts information; Step 2: Obtain the connection mode of the assembly parts corresponding to the assembled module, select the standard connection mode according to the number of assembly parts corresponding to different connection modes, and classify the assembly parts according to the standard connection mode to obtain connection classification information, wherein the connection classification information includes: matching assembly parts and non-matching assembly parts; Step 3: Process the obtained connection classification information. For the unmatched assembly parts, analyze the connection mode and reselect the connection mode to generate pre-selected connection mode information. Then, obtain the secondary assembly parts according to the pre-selected connection mode information. The specific method of generating the pre-selected connection mode information is as follows: Get all the unmatched assemblies and label them as n, where n=1, 2, ..., m. At the same time, get the connection mode a corresponding to the unmatched assembly n, and get the connection duration Ta and connection strength Qa corresponding to the connection mode a. Then substitute the obtained parameters into the formula The comprehensive value Pa corresponding to connection mode a is calculated, where Ta is the average value. It is a preset proportional coefficient, and the specific value is set by the operator; Then, the connection mode corresponding to the maximum comprehensive value of assembly n is selected and recorded as the connection mode to be analyzed. At the same time, the connection mode to be analyzed is used as the standard for analysis. If there is an assembly matching the connection mode to be analyzed, the corresponding assembly is marked as a pre-selected assembly. At the same time, the quantity corresponding to the pre-selected assembly is obtained, and the quantity ratio of the pre-selected assembly is calculated. The quantity ratio is compared with the threshold. If the quantity ratio is greater than the threshold, the pre-selected connection mode information is generated according to the connection mode to be analyzed, and the corresponding pre-selected assembly is marked as a secondary assembly. If the quantity ratio is less than the threshold, a secondary analysis signal is generated. Otherwise, if there is no assembly matching the connection mode to be analyzed, a secondary analysis signal is generated, and the specific method for processing the secondary analysis signal is as follows: Analyze from the largest to the smallest comprehensive value, select the corresponding pre-selected assembly parts, and calculate the quantity ratio of the pre-selected assembly parts. Then compare the quantity ratio with the threshold value, and so on to obtain the pre-selected connection mode information and obtain the secondary assembly parts; Step 4: Analyze the obtained matching assembly parts and secondary assembly parts, generate assembly sequence through BIM model analysis, and generate design information in combination with assembly requirements. The specific method of generating design information is as follows: Obtain all matching assemblies and secondary assemblies, and obtain the corresponding BIM building model, generate the assembly sequence of the matching assemblies and secondary assemblies based on the BIM building model, then obtain the actual assembly requirements, and mark the assemblies that need to be adjusted as assemblies to be analyzed based on the actual assembly requirements, and combine the actual assembly requirements with the assemblies to be analyzed to generate design information; Step 5: Process the obtained assembly parts to be analyzed, and determine whether the connection mode needs to be adjusted by analyzing the connection mode of adjacent assembly parts to be analyzed, and generate corresponding adjustment information according to the influence of the connection mode, and the specific method of generating the adjustment information is: Obtain all the assemblies to be analyzed, and at the same time obtain the corresponding assembly sequence numbers, then analyze the assemblies to be analyzed according to the assembly sequence numbers from small to large, obtain the assemblies to be analyzed with adjacent assembly sequence numbers and record them as adjacent assemblies, and do not process the assemblies to be analyzed without adjacent assembly sequence numbers, and generate normal assembly results, obtain the connection methods corresponding to the adjacent assemblies, and determine whether the connection methods are the same. If the connection methods are the same, do not process them and generate normal assembly results. If the connection methods are different, generate an impact judgment signal; Obtain the comprehensive values ​​corresponding to adjacent assembly parts, and select the connection mode corresponding to the maximum comprehensive value as the connection mode to be adjusted. At the same time, judge the influence of the connection mode to be adjusted. The specific judgment method is: obtain the connection strength of the connection mode to be adjusted, and judge the change of the connection strength. If the connection strength increases, the adjustment result is generated based on the connection mode to be adjusted as the standard. If the connection strength decreases, it will not be processed and the normal assembly result will be generated.

2. The BIM-based prefabricated building design method according to claim 1, characterized in that: The specific method of obtaining the module assembly information in step 1 is: The prefabricated building model is obtained, and the obtained building model is split to obtain multiple groups of prefabricated modules, which are labeled i, and i=1, 2, ..., j, where j represents the number of prefabricated modules. Then, the assembly parts corresponding to the prefabricated module i are obtained, and the assembly parts classification information is obtained by classifying them according to their shapes. At the same time, the number of assemblies corresponding to the classification information of the same type of assembly parts is obtained. Then, the number of assemblies of the same type corresponding to the overall prefabricated building is obtained, and the module assembly parts information is generated.

3. The BIM-based prefabricated building design method according to claim 1, characterized in that: The specific method of selecting the standard connection method in step 2 is: Get any group of prefabricated modules and record them as target objects. Get the connection methods corresponding to the target objects and label them as a, where a=1, 2, ..., b, where b represents the number of connection methods. Then get the number of assemblies corresponding to connection method a and sort connection methods a from large to small according to the number of assemblies. Similarly, perform the same processing on all prefabricated modules and select the connection method corresponding to the largest number of assemblies as the standard connection method.

4. The BIM-based prefabricated building design method according to claim 1, characterized in that: The specific method of classifying the assembly parts in the standard connection method to obtain the connection classification information in step 2 is: Obtain the standard connection method, and match the connection method corresponding to the assembly with the standard connection method. If the connection method of the assembly includes the standard connection method, the corresponding assembly is classified as a matching assembly. Otherwise, if the connection method of the assembly does not include the standard connection method, the corresponding assembly is classified as an unmatched assembly, and connection classification information is generated.

5. A BIM-based prefabricated building design system, used to execute a BIM-based prefabricated building design method according to any one of claims 1 to 4, characterized in that: It includes an assembly information collection unit, an information processing and analysis unit, a connection mode selection unit, a comprehensive adjustment and analysis unit, and an information output unit; An assembly information acquisition unit, which is used to acquire the assembled building model information and transmit the assembled building model information to the information processing and analysis unit; An information processing and analysis unit, which is used to split the prefabricated building into prefabricated modules according to the obtained prefabricated building model information, and to analyze and process the assembly parts of the prefabricated modules to obtain module assembly part information, and at the same time transmit the module assembly part information to the connection mode selection unit; A connection method selection unit, which is used to process the obtained module assembly information, obtain the connection method of the assembly parts corresponding to the assembled module, and select a standard connection method according to the number of assembly parts corresponding to different connection methods, and classify the assembly parts in the standard connection method to obtain connection classification information, wherein the connection classification information includes: matching assembly parts and non-matching assembly parts, process the obtained connection classification information, further analyze the connection method for non-matching assembly parts, reselect the connection method to generate pre-selected connection method information, and obtain secondary assembly parts according to the pre-selected connection method information, analyze the obtained matching assembly parts and secondary assembly parts, generate an assembly sequence through the BIM model, and generate design information in combination with assembly requirements, and transmit the generated design information to the comprehensive adjustment analysis unit; A comprehensive adjustment analysis unit, which is used to analyze the acquired design information, process the obtained assembly parts to be analyzed, and determine whether the connection mode needs to be adjusted by analyzing the connection mode of adjacent assembly parts to be analyzed, and generate corresponding adjustment information according to the influence of the connection mode, and the adjustment information includes: mode adjustment result and normal assembly result, and then transmit the adjustment information to the information output unit; An information output unit is used to display the acquired adjustment information to the corresponding operator.

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