CN115292788A - Method for rapidly constructing and realizing large building space structure model based on sub-blocks - Google Patents
Method for rapidly constructing and realizing large building space structure model based on sub-blocks Download PDFInfo
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- CN115292788A CN115292788A CN202210965959.3A CN202210965959A CN115292788A CN 115292788 A CN115292788 A CN 115292788A CN 202210965959 A CN202210965959 A CN 202210965959A CN 115292788 A CN115292788 A CN 115292788A
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Abstract
A method for quickly constructing a large building space structure model based on subblocks comprises the steps of generating a model by constructing a basic frame, generating an integral structure model by adopting an insert subblock algorithm, and quickly constructing the optimal structure of the large building space structure model by adopting a space structure optimization design algorithm. The invention obtains the structural model with the most reasonable design, the highest material utilization rate and the best economic benefit.
Description
Technical Field
The invention relates to a technology in the field of building design, in particular to a realization method for quickly constructing a large building space structure model based on subblocks.
Background
Modeling is the first step of structural design and is also an indispensable link. With the wider and wider application of space structures, the architectural structure forms gradually tend to be complicated. At present, for a complex space building structure, the modeling process is extremely complicated, the time consumption is long, the efficiency is low, the design process is not flexible enough, once the work load is increased by several times or even tens of times, even if the latest computer-aided technology is adopted, the core difficult pain point cannot be solved, namely, the modeling design of the complex space structure is rapidly and flexibly carried out, and the model adjustment is carried out conveniently and timely. For a complex space structure, the design period and the modeling efficiency are limited, multi-scheme optimization comparison cannot be realized, a more reasonable optimized model cannot be selected, and the problems of high material consumption, poor economical efficiency and the like of the complex space structure are caused.
Disclosure of Invention
Aiming at the outstanding problems of high material consumption, poor economy and the like caused by the fact that the modeling process of a complex spatial structure is complicated, the time consumption is long, the efficiency is low, and the optimization comparison of different schemes is difficult to realize in the prior art, the invention provides a method for quickly constructing and realizing a large-scale building spatial structure model based on subblocks, and a structural model with the most reasonable design, the highest material utilization rate and the best economic benefit is obtained.
The invention is realized by the following technical scheme:
the invention relates to a method for quickly constructing a large building space structure model based on subblocks.
The sub-block insertion algorithm comprises the following steps: and inserting the sub-blocks according to the conducting wires and the number of the sub-blocks in the basic framework generation model to complete the model construction.
The spatial structure optimization design algorithm is as follows: and adjusting the section and the node model of the component according to the finite element calculation result, and optimizing the model so as to obtain the model structure with the minimum steel consumption.
The invention relates to a system for realizing the method, which comprises the following steps: the model base frame generating unit, the sub-block inserting unit and the structure optimization design unit are provided, wherein: the model base frame generating unit generates model information, positioning information, structural boundary information and working condition load calculating methods of all base sub-blocks and wires according to modeling information, the sub-block inserting unit inserts the sub-blocks in parts along the wires according to the defined sub-block and wire information to obtain a structural model applying loads and constraints, the structural optimization design unit performs component and node optimization design on the structural model, and all structural model optimization results are compared and analyzed to obtain the optimal structure of the large building space structural model.
The model base frame generation unit comprises: define subblock module, attached subblock module, fill subblock module, define wire module, define load template module, wherein: defining a subblock module to design a basic subblock model according to modeling information; the wire defining module carries out wire drawing and definition according to the structural boundary information to obtain structural boundary and part information; and the load template defining module is used for designing a load template according to the design information to obtain a load calculation method under each working condition.
The basic sub-block model comprises: subblocks, dependent subblocks, padding subblocks, and positioning information.
Technical effects
According to the invention, through a model basic framework generation algorithm, an insertion subblock algorithm and an optimization design algorithm, on the basis of finishing the definition of basic subblocks and leads, the modeling time of a complex space structure can be shortened by more than 90%, and the requirements of design standards are completely met. By the method, a large number of models with different control parameters can be automatically established for comparison and optimization, so that the most reasonable structural model is obtained, materials can be saved by more than 10%, and economic benefits are improved by more than 50%.
Drawings
FIG. 1 is a flow chart of the present invention;
FIG. 2 is a schematic structural view;
FIG. 3 is a structure rendering;
FIG. 4 is a diagram of subblock definition information;
FIG. 5 is a diagram of the sub-block geometry information;
FIG. 6 is a diagram of the sub-block positioning information;
FIG. 7 is a diagram of fill subblock definition information;
FIG. 8 is a drawing of information defining two lines for a copy number of 24;
FIG. 9 is a diagram of two wire definition information for copy number 36;
FIG. 10 is a three-dimensional view of 24 parts of model structures;
FIG. 11 is a top view of the preferred structure (36);
FIG. 12 is a three-dimensional view (number 36) of the optimal structure;
FIG. 13 is a comparison of sub-block structures of different regions.
Detailed Description
As shown in fig. 1, this embodiment relates to a method for implementing fast building of a complex spatial structure model based on sub-blocks, which includes:
step one, constructing a basic framework generation model, comprising the following steps:
step 1.1) defining sub-blocks, including:
step 1.1.1) defining all geometric elements of the subblocks, including nodes, units, loads and boundary information of the subblocks;
and step 1.1.2) defining subblock constraint information, including information of a length fixing rod, a direction fixing rod, a node on a lead, the lead and other equal points. Wherein: the length-fixed rod is a rod piece with the unchanged length in the sub-block inserting process, the direction-fixed rod is a rod piece with the unchanged rod piece direction in the sub-block inserting process, the nodes on the conducting wire are the nodes kept on the conducting wire in the sub-block inserting process, and the equally-divided points of the conducting wire are the nodes kept on the equally-divided points of the conducting wire in the sub-block inserting process;
step 1.1.3) defining subblock positioning information, including two base points and subblock directions.
Step 1.2) defining a wire, comprising:
step 1.2.1) defining a group of lines or curves (which can be only one point) connected end to end as leads;
step 1.2.2) defining the maximum number of parts Nmax and the minimum number of parts Nmin of the wire;
step 1.2.3) defines the fraction change step S of the wire.
Step 1.3) defining a load template
Step 1.3.1) defining load working conditions including constant load, live load, wind load, temperature action, earthquake action and the like;
step 1.3.2) defines a calculation method of loads under various working conditions.
Preferably, if necessary, an auxiliary sub-block attached to the sub-block may be further defined, including:
i) Defining all attached sub-block geometric elements including node, unit, load and boundary information of the attached sub-blocks;
ii) defining auxiliary sub-block constraint information comprising auxiliary sub-block length and direction fixing rods. Wherein: the auxiliary sub-block length-fixing rod is a rod piece which ensures that the length is unchanged in the auxiliary sub-block inserting process, and the auxiliary sub-block direction-fixing rod is a rod piece which ensures that the rod piece direction is unchanged in the auxiliary sub-block inserting process;
iii) Defining auxiliary sub-block positioning information, including starting base point, terminating base point, two base points and their corresponding nodes, and auxiliary sub-block direction.
Preferably, if necessary, a padding sub-block attached to the sub-block may be further defined, including:
a) Defining all geometric elements of the filling subblocks, including nodes, units, loads and boundary information of the filling subblocks;
b) And defining constraint information of the filling subblocks, including information of equal division points of the filling subblock length fixing rod, the filling subblock direction fixing rod and the auxiliary nodes. Wherein: the filling sub-block length-fixing rod is a rod piece which ensures that the length is unchanged in the filling sub-block inserting process, the filling sub-block direction-fixing rod is a rod piece which ensures that the rod piece direction is unchanged in the filling sub-block inserting process, and the auxiliary node is a node which is kept on the sub-block and the auxiliary sub-block in the filling sub-block inserting process;
c) And defining filling subblock positioning information, wherein the filling subblock positioning information comprises two starting reference angular points, two ending reference angular points and corresponding nodes of the reference angular points and the subblocks.
Step two, generating a lead and a step length insertion sub-block in the model according to the basic framework to complete model construction, which specifically comprises the following steps: and according to the number of parts of the line, the number of conductor parts n = { Nmin, nmin + S, nmin +2S, … and Nmax } is obtained according to the number of parts of the line, every two corresponding subblock insertion points are obtained according to each number of parts n, each group of insertion points are used as base point positions of subblocks to be inserted into the subblocks, and X models, X = (Nmax-Nmin)/S are obtained.
Preferably, if necessary, additional sub-blocks or padding sub-blocks may be further inserted between adjacent sub-blocks, that is: two nodes corresponding to two base points of the auxiliary sub-block are searched on two adjacent sub-blocks, and the two corresponding nodes on the adjacent sub-blocks are used as base point positions to be inserted into the auxiliary sub-block; or four nodes corresponding to the four reference angular points of the filling sub-block are searched on two adjacent sub-blocks, and the four corresponding nodes on the adjacent sub-blocks are used as angular point positions of the filling sub-blocks to be inserted into the filling sub-blocks.
Step three, applying loads and boundaries, respectively carrying out component and node optimization design on the generated X model structures, and selecting an optimal structure according to optimization indexes, wherein the method comprises the following steps:
step 3.1) referring to the defined load information on the subblocks, the auxiliary subblocks and the filling subblocks, and applying a load to the generated structure according to the defined load template;
step 3.2) referring to the boundary information on the defined sub-block, the dependent sub-block and the filling sub-block, and applying boundary conditions to the generated structure.
Step 3.3) carrying out component and node optimization design on the generated structure, comprising the following steps: and respectively adjusting the section and the node type of each model component according to the finite element calculation result so as to achieve the minimum steel consumption.
And 3.4) comparing the steel consumption of the X models, and setting the model structure with the minimum steel consumption as an optimal structure.
Through concrete actual experiment to the stadium roofing of a car width of cloth formula cable truss structure of design is for the example, and the structure includes cable truss, the outer ring roof beam of rigidity to and ring cable about inside, wherein: the load of the roof is transmitted to the foundation through the outer ring beam and the upright post; in each cable truss, the flying column is a rigid member which can be pulled and compressed, and the cables are flexible members which can only be pulled; the roof structure is saddle-shaped, and the projections of the inner upper and lower ring cables and the outer ring beams on the horizontal plane are ellipses, wherein the projection dimension of the horizontal plane of the outer ring beam is about 240 x 263m, and the projection dimension of the horizontal plane of the inner ring cable is about 124 x 148m, as shown in fig. 2 and 3.
Through the steps, models of 5 groups of same basic sub-blocks and different wire parts of space wires are built, wherein the wire parts are respectively 24, 28, 32, 36 and 40. Wherein: FIG. 4 is a diagram of subblock definition information for a specific practical trial; FIG. 5 is a diagram of the attached sub-block geometry information for a specific practical experiment; FIG. 6 is a diagram of the positioning information of the sub-blocks for a specific practical test; FIG. 7 is a diagram of fill sub-block definition information for a particular practical trial; FIG. 8 is a drawing of information defining two lines for a copy number of 24; FIG. 9 is a diagram of two wire definition information for copy number 36; FIG. 10 is a three-dimensional diagram of the resulting 24-part model structure; FIG. 11 is a top view of the optimal structure (36 copies) obtained by the experiment; fig. 12 is a three-dimensional diagram (part 36) of the optimum structure obtained by the experiment.
Taking 36 parts of optimal structure as an example, only a model of about 1/36 of the overall structure is needed to be established, including 638 building blocks including sub-blocks, auxiliary sub-blocks and filling sub-blocks, and 36 different overall structure models with the total number of building blocks of 21890 are automatically established by a method of inserting sub-blocks. Since 36 parts (36 parts) in the model are different, fig. 13 shows that sub-blocks are inserted into different regions for comparison for the optimal structure (36 parts), so that the initially established sub-blocks, the auxiliary sub-blocks and the filling sub-blocks are not simply copied in the modeling process, but the initially established sub-blocks, the auxiliary sub-blocks and the filling sub-blocks are copied to generate the model after being adjusted by complex operation based on the method. After the sub-blocks, the auxiliary sub-blocks, the filling sub-blocks and the conducting wires are defined, an integral model can be generated within 1min, and the modeling time is about 1/36 of the original modeling time after the method is adopted; when the model is changed from 36 parts to 24 parts or other parts, the model is required to be rebuilt according to the original modeling mode, the 24 parts of the model (total component number is 14616) can be completed within 1min only by changing 36 parts of the conducting wires to 24 parts by adopting the method, almost no time is required for the rebuilding, and the comparison and optimization of the structural models with different parts can be automatically completed by adopting the method, so that the optimal structure is found.
Compared with the prior art, the method adopts the subblock insertion technology in the model generation link, and after the basic subblocks and the conducting wire are defined, the modeling time of the complex space structure can be shortened by over 90 percent and the requirements of design standards are completely met. In the optimization design link, a large number of models with different control parameters can be automatically established through the optimization design algorithm of the method for comparison optimization, so that the most reasonable structure model is obtained, materials can be saved by more than 10%, and economic benefits are improved by more than 50%.
The foregoing embodiments may be modified in many different ways by one skilled in the art without departing from the spirit and scope of the invention, which is defined by the appended claims and not by the preceding embodiments, and all embodiments within their scope are intended to be limited by the scope of the invention.
Claims (8)
1. A method for quickly constructing a large building space structure model based on subblocks is characterized in that after a basic frame is initialized to generate a model, an integral structure model is generated by adopting an insertion subblock algorithm, and then the optimal structure of the large building space structure model is quickly constructed by adopting a space structure optimization design algorithm;
the sub-block insertion algorithm comprises the following steps: inserting sub-blocks according to the conducting wires and the number of the sub-blocks in the basic framework generation model to complete model construction;
the spatial structure optimization design algorithm is as follows: and adjusting the section and node model of the component according to the finite element calculation result, and optimizing the model so as to obtain the model structure with the minimum steel consumption.
2. The method for realizing rapid construction of a space structure model of a large building based on subblocks according to claim 1, which comprises the following steps:
step one, constructing a basic framework generation model, comprising the following steps:
step 1.1) defining sub-blocks, including:
step 1.1.1) defining all geometric elements of the subblocks, including nodes, units, loads and boundary information of the subblocks;
step 1.1.2) defining subblock constraint information, including information of a length fixing rod, a direction fixing rod, a lead upper node, a lead equal division point and the like; wherein: the length-fixed rod is a rod piece with the unchanged length in the sub-block inserting process, the direction-fixed rod is a rod piece with the unchanged rod piece direction in the sub-block inserting process, the nodes on the conducting wire are the nodes kept on the conducting wire in the sub-block inserting process, and the equally-divided points of the conducting wire are the nodes kept on the equally-divided points of the conducting wire in the sub-block inserting process;
step 1.1.3) defining subblock positioning information, wherein the subblock positioning information comprises two base points and subblock directions;
step 1.2) defining a wire, comprising:
step 1.2.1) defining a group of lines, curves or points which are connected end to end as conducting wires;
step 1.2.2) defining the maximum number of parts Nmax and the minimum number of parts Nmin of the wire;
step 1.2.3) defining the number change step S of the conducting wire;
step 1.3) definition of load template
Step 1.3.1) defining a load working condition;
step 1.3.2) defining a calculation method of load of each working condition;
step two, inserting the sub-blocks according to the conducting wires and the step length in the basic framework generation model to complete model construction, which specifically comprises the following steps: according to the number of parts of change step S, the maximum number of parts Nmax and the minimum number of parts Nmin, the number of conductor parts n = { Nmin, nmin + S, nmin +2S, … and Nmax } is solved, then every two corresponding subblock insertion points are solved according to each number of parts n, each group of insertion points are used as base point positions of subblocks to insert the subblocks, X models are obtained, and X = (Nmax-Nmin)/S is obtained;
step three, applying loads and boundaries, respectively carrying out component and node optimization design on the generated X model structures, and selecting an optimal structure according to optimization indexes, wherein the method comprises the following steps:
step 3.1) referring to the defined load information on the subblocks, the auxiliary subblocks and the filling subblocks, and applying a load to the generated structure according to the defined load template;
step 3.2) referring to the boundary information on the defined sub-block, the auxiliary sub-block and the filling sub-block, and applying boundary conditions to the generated structure;
step 3.3) carrying out component and node optimization design on the generated structure, comprising the following steps: respectively adjusting the section and node type of each model component according to the finite element calculation result so as to achieve the minimum steel consumption;
and 3.4) comparing the steel consumption of the X models, and setting the model structure with the minimum steel consumption as an optimal structure.
3. The method for rapidly constructing and implementing the spatial structure model of the large building based on the sub-blocks as claimed in claim 2, wherein the step 1 further defines the attached sub-blocks attached to the sub-blocks, comprising:
i) Defining all attached sub-block geometric elements including node, unit, load and boundary information of the attached sub-blocks;
ii) defining accessory sub-block constraint information including accessory sub-block stem, accessory sub-block direction-determining bar information, wherein: the auxiliary sub-block length-fixing rod is a rod piece which ensures that the length is unchanged in the auxiliary sub-block inserting process, and the auxiliary sub-block direction-fixing rod is a rod piece which ensures that the rod piece direction is unchanged in the auxiliary sub-block inserting process;
iii) Defining auxiliary sub-block positioning information, including starting base point, terminating base point, two base points and their corresponding nodes, and auxiliary sub-block direction.
4. The method for rapidly constructing and implementing the large building space structure model based on the sub-blocks as claimed in claim 2, wherein the step 1 further defines the filling sub-blocks attached to the sub-blocks, including:
a) Defining all geometric elements of the filling subblocks, including nodes, units, loads and boundary information of the filling subblocks;
b) Defining the constraint information of the filling subblocks, wherein the constraint information comprises the information of the equal division points of the fixed length rods of the filling subblocks, the fixed direction rods of the filling subblocks, the attached nodes and the like, and the constraint information comprises the following information: the filling sub-block length-fixing rod is a rod piece which ensures that the length is unchanged in the filling sub-block inserting process, the filling sub-block direction-fixing rod is a rod piece which ensures that the rod piece direction is unchanged in the filling sub-block inserting process, and the auxiliary node is a node which is kept on the sub-block and the auxiliary sub-block in the filling sub-block inserting process;
c) And defining filling subblock positioning information, wherein the filling subblock positioning information comprises two starting reference angular points, two ending reference angular points and corresponding nodes of the reference angular points and the subblocks.
5. The method for rapidly constructing and implementing the spatial structure model of the large building based on the sub-blocks as claimed in claim 2, wherein in the second step, additional sub-blocks or filler sub-blocks are further inserted between adjacent sub-blocks, namely: two nodes corresponding to two base points of the auxiliary sub-block are searched on two adjacent sub-blocks, and the two corresponding nodes on the adjacent sub-blocks are used as base point positions to be inserted into the auxiliary sub-block; or four nodes corresponding to the four reference angular points of the filling sub-block are searched on two adjacent sub-blocks, and the four corresponding nodes on the adjacent sub-blocks are used as angular point positions of the filling sub-blocks to be inserted into the filling sub-blocks.
6. A system for realizing the method for rapidly constructing and realizing the subblock-based large-scale building spatial structure model according to any one of claims 1-5, comprises the following steps: the model base frame generating unit, the sub-block inserting unit and the structure optimization design unit are provided, wherein: the model basic frame generating unit generates model information, positioning information, structural boundary information and working condition load calculating methods of all basic sub-blocks and wires according to modeling information, the sub-block inserting unit inserts sub-blocks into wires according to the number of the sub-blocks and the wire information which are defined, a structural model applying load and constraint is obtained, the structural optimization designing unit carries out component and node optimization design on the structural model, and all structural model optimization results are compared and analyzed, so that the optimal structure of the large building space structural model is obtained.
7. The system of claim 6, wherein the model base framework generation unit comprises: define subblock module, subsidiary subblock module, fill subblock module, define wire module, define the load template module, wherein: defining a subblock module to design a basic subblock model according to modeling information; the wire defining module is used for drawing and defining wires according to the structural boundary information to obtain structural boundary and part information; and the defined load template module carries out load template design according to the design information to obtain a calculation method of the load of each working condition.
8. The system of claim 7, wherein the base sub-block model comprises: subblocks, dependent subblocks, padding subblocks, and positioning information.
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