CN113032871B - Method for optimizing dynamic stability performance of single-layer spherical reticulated shell structure - Google Patents

Method for optimizing dynamic stability performance of single-layer spherical reticulated shell structure Download PDF

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CN113032871B
CN113032871B CN202110269219.1A CN202110269219A CN113032871B CN 113032871 B CN113032871 B CN 113032871B CN 202110269219 A CN202110269219 A CN 202110269219A CN 113032871 B CN113032871 B CN 113032871B
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bearing capacity
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CN113032871A (en
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王军林
孙建恒
路维
李红梅
任小强
赵淑丽
郭华
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Hebei Agricultural University
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    • G06—COMPUTING; CALCULATING OR COUNTING
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    • G06F30/00—Computer-aided design [CAD]
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    • G06F30/13—Architectural design, e.g. computer-aided architectural design [CAAD] related to design of buildings, bridges, landscapes, production plants or roads
    • E—FIXED CONSTRUCTIONS
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    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/32—Arched structures; Vaulted structures; Folded structures
    • E04B1/3211—Structures with a vertical rotation axis or the like, e.g. semi-spherical structures
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/342—Structures covering a large free area, whether open-sided or not, e.g. hangars, halls
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
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    • E04B1/32—Arched structures; Vaulted structures; Folded structures
    • E04B2001/3235—Arched structures; Vaulted structures; Folded structures having a grid frame
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    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
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    • E04B1/32—Arched structures; Vaulted structures; Folded structures
    • E04B2001/3235—Arched structures; Vaulted structures; Folded structures having a grid frame
    • E04B2001/3241—Frame connection details
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Abstract

The invention discloses a method for optimizing the dynamic stability of a single-layer spherical reticulated shell structure, which comprises the following steps: determining the initial steel consumption and the initial stable bearing capacity of the single-layer spherical reticulated shell structure; calculating the rigidity of each node, and sequencing the rigidity from small to large in sequence to obtain a rigidity sequence; sequentially checking whether the rigidity value of each node in the rigidity sequence meets a set rigidity condition, and adjusting the section of the rod piece when the rigidity value of each node in the rigidity sequence does not meet the set rigidity condition until the rigidity value of the currently checked node meets the set rigidity condition; and if the recalculated steel consumption of the latticed shell and the stable bearing capacity meet the optimization conditions, recording the design parameters after the adjustment, and determining the latticed shell stability optimization result according to the recorded design parameters after the adjustment of the section of the rod piece is completed aiming at the rigidity values of all the nodes in the rigidity sequence. By using the invention, the steel amount of the latticed shell structure can be minimized on the premise of meeting the requirement of nonlinear stability performance of the structure.

Description

Dynamic stability performance optimization method for single-layer spherical reticulated shell structure
Technical Field
The invention relates to the technical field of civil engineering, in particular to a method for optimizing dynamic stability of a single-layer spherical reticulated shell structure.
Background
With the development of social economy, the application of large-span space structures is more and more extensive. The latticed shell structure becomes a preferred scheme for architects to design large-span space structures due to reasonable and rich modeling of the latticed shell structure, and a plurality of large-span latticed shell structures become landmark buildings of cities.
Because the large-span latticed shell structure has large volume, the steel consumption is very large. The ultimate bearing capacity of the single-layer reticulated shell structure is determined by the stability performance of the single-layer reticulated shell structure, the cross section of a rod piece is generally determined by the internal force under the action of design load in the design of the prior reticulated shell structure, the overall stability of the reticulated shell is analyzed and checked on the premise of meeting the stability, strength and structural deflection of the rod piece, and the reticulated shell structure passes the stability checking if the requirement of space grid structure design regulation (the elastic-plastic stable bearing capacity of the reticulated shell structure is more than 2 times of the standard value of the load) is met; if the checking result can not meet the standard requirement, the vector-span ratio and the grid division size of the latticed shell structure are usually determined by the building shape and the size of a roof panel and can not be changed generally, so that the cross section of a rod piece of the latticed shell is reinforced generally, and the stable bearing capacity can meet the standard requirement. Because the number of the rod pieces of the latticed shell structure is large, the stable bearing capacity of the latticed shell structure can be improved most effectively by increasing the cross section of the rod pieces at any position, increasing the number of the rod pieces and increasing the degree of the rod pieces, and the steel consumption of the structure is minimum, the current research on the problem is less, the problem is not well solved, and the guidance is lacked in the engineering design.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a dynamic stability performance optimization method for a single-layer spherical reticulated shell structure, which can minimize the steel amount of the reticulated shell structure on the premise of meeting the requirement of the nonlinear stability performance of the structure.
Therefore, the invention provides the following technical scheme:
a method for optimizing dynamic stability performance of a single-layer spherical reticulated shell structure comprises the following steps:
determining initial steel consumption M of single-layer spherical reticulated shell structure 0 And initial stable bearing capacity C 0 ；
Calculating the rigidity of each node of the single-layer spherical reticulated shell structure, and sequencing the rigidity values obtained by calculation from small to large in sequence to obtain a rigidity sequence;
sequentially checking whether the rigidity value of each node in the rigidity sequence meets a set rigidity condition, and adjusting the section of the rod piece when the rigidity value of each node in the rigidity sequence does not meet the set rigidity condition until the rigidity value of the currently checked node meets the set rigidity condition;
recalculating the amount of Steel M for the reticulated shells i And stable bearing capacity C i ；
If the recalculated steel amount M for the reticulated shell is used i And stable bearing capacity C i If the optimization condition is met, recording the design parameters after the adjustment, wherein the design parameters comprise the recalculated steel amount M for the latticed shell i And stable bearing capacity C i ；
And after adjusting the section of the rod piece according to the rigidity values of all the nodes in the rigidity sequence, determining a stable optimization result of the latticed shell according to the recorded design parameters after each adjustment.
Optionally, the performing of the adjustment of the cross section of the rod comprises:
increasing the area of the cross section of the rod piece according to a set step length;
and recalculating the rigidity of each node, and reordering the nodes from small to large in sequence according to the calculated rigidity values to obtain a rigidity sequence after the section of the rod piece is adjusted.
Optionally, the stiffness condition is: the difference value between the rigidity value of the current checked node and the reference rigidity value is smaller than a set threshold value; the reference rigidity value is the rigidity value with the smallest difference with the rigidity value of the currently checked node.
Optionally, the optimization conditions include any one or more of:
(1) recalculated steel amount M for latticed shell i Less than the initial steel amount M 0 ；
(2) Recalculated stable bearing capacity C i Greater than the initial stable bearing capacity C 0 ；
(3) Ratio M of recalculated steel usage amount to recalculated stable bearing capacity i /C i Less than the ratio M of the initial steel consumption to the initial stable bearing capacity 0 /C 0 。
Optionally, the determining, according to the recorded design parameters after each adjustment, a stable optimization result of the latticed shell includes:
and calculating the ratio of the steel consumption of the latticed shell after each adjustment to the stable bearing capacity according to the recorded design parameters after each adjustment, and taking the design parameter corresponding to the minimum ratio as the latticed shell stability optimization result.
Optionally, the initial steel amount M of the net shell for determining the single-layer spherical net shell structure 0 And initial stable bearing capacity C 0 Before, still include:
calculating the stable bearing capacity of the single-layer spherical reticulated shell structure;
if the stable bearing capacity does not meet the requirement, adjusting the section area of the rod piece of the single-layer spherical reticulated shell structure until the single-layer spherical reticulated shell structure meets the requirement;
optionally, the stable bearing capacity of the single-layer spherical reticulated shell structure comprises: the rod piece of the single-layer spherical reticulated shell structure stabilizes the bearing capacity and/or stabilizes the bearing capacity integrally.
According to the method for optimizing the dynamic stability of the single-layer spherical reticulated shell structure, provided by the embodiment of the invention, in the process of optimizing and analyzing the stability of the single-layer spherical reticulated shell structure, the rigidity of the nodes of the reticulated shell structure is calculated, the node instability sequence is judged according to the calculated rigidity value of the nodes, and the steel quantity of the reticulated shell structure is minimized on the premise of meeting the standard requirements, particularly meeting the structural nonlinear stability performance requirements by adjusting the section size of the rod piece.
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In order to more clearly illustrate the embodiments of the present application or technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to the drawings.
FIG. 1 is a schematic diagram of a single-layer spherical reticulated shell structure in an embodiment of the present invention;
FIG. 2 is a flow chart of a method for optimizing dynamic stability of a single-layer spherical reticulated shell structure according to an embodiment of the present invention;
FIG. 3 is another flow chart of the method for optimizing dynamic stability of a single-layer spherical reticulated shell structure according to an embodiment of the present invention;
fig. 4 is a flowchart illustrating an exemplary embodiment of adjusting a preliminary design model of a single-layer spherical reticulated shell structure to meet relevant industry regulations.
Detailed Description
In order to make the technical field of the invention better understand the scheme of the embodiment of the invention, the embodiment of the invention is further described in detail with reference to the drawings and the implementation mode.
The embodiment of the invention provides a method for optimizing the dynamic stability performance of a single-layer spherical reticulated shell structure.
Fig. 1 is a schematic view of a single-layer spherical reticulated shell structure according to an embodiment of the present invention, which is a K8 type single-layer spherical reticulated shell mainly composed of rods and nodes, and unlike a conventional reinforced concrete structure, the structure is mainly controlled by stability rather than strength.
Correspondingly, fig. 2 is a flowchart of a method for optimizing dynamic stability of a single-layer spherical reticulated shell structure according to an embodiment of the present invention.
It should be noted that the single-layer spherical reticulated shell structure in this embodiment is a single-layer spherical reticulated shell structure that is obtained through engineering design and meets the relevant industry regulations, and for example, may be a single-layer spherical reticulated shell structure that meets the requirement of stable bearing capacity determined according to the empirical calculation of "design rules of spatial grid structure", where the stable bearing capacity may include: the rod stabilizes the bearing capacity and/or stabilizes the bearing capacity as a whole.
The method for optimizing the dynamic stability of the single-layer spherical reticulated shell structure provided by the embodiment comprises the following steps:
step 201, determining the initial steel consumption M of the single-layer spherical reticulated shell structure 0 And initial stable bearingForce C 0 。
The calculation of the steel consumption and the stable bearing capacity can adopt the prior art, and the embodiment of the invention is not limited.
Step 202, calculating the rigidity of each node of the single-layer spherical reticulated shell structure, and sequencing the rigidity values obtained through calculation from small to large in sequence to obtain a rigidity sequence.
The node stiffness can be calculated by the following formula:
Figure BDA0002973501860000051
Figure BDA0002973501860000052
Figure BDA0002973501860000053
wherein m is the total number of nodes of the reticulated shell, i is the node number, and i is more than or equal to 1 and less than or equal to m; n is the sum of the number of the rod pieces connected with the node i, and j is more than or equal to 1 and less than or equal to n; alpha is alpha j Is the angle between the jth rod piece connected with the node i and the tangent plane of the node i, E is the elastic modulus of the rod piece material, A j Is the cross-sectional area of the jth rod piece. S node，min Is the minimum node stiffness value, S node，max Is the maximum node stiffness value.
And 203, sequentially checking whether the rigidity value of each node in the rigidity sequence meets the set rigidity condition, and adjusting the section of the rod piece when the rigidity value of each node in the rigidity sequence does not meet the set rigidity condition until the rigidity value of the currently checked node meets the set rigidity condition.
It should be noted that, specifically, the adjustment of the cross section of the rod may be performed by increasing the area of the cross section of the rod according to a set step length, and of course, the area of the cross section of the rod increased in each adjustment may also be different, which is not limited in this embodiment of the present invention. In addition, after each adjustment, the rigidity of each node needs to be recalculated, and the rigidity values obtained through calculation need to be rearranged from small to large in sequence to obtain a rigidity sequence after the section of the rod is adjusted.
In an embodiment of the present invention, the stiffness condition is: the difference value between the rigidity value of the current checked node and the reference rigidity value is smaller than a set threshold value; the reference rigidity value is the rigidity value with the smallest difference with the rigidity value of the currently checked node.
It should be noted that, because the actual rod section size in the engineering is not a continuous variable but a discrete variable, in practical application, it is only necessary to increase the rod section area until the recalculated stiffness value of the inspected node is close to the reference stiffness value. For example, for the current minimum node stiffness value S node，min Increasing the section area of the rod member until the minimum node rigidity value S node，min The node stiffness value having the smallest difference from the node stiffness value (i.e., the reference stiffness value) may be close to the node stiffness value.
Step 204, recalculating the steel amount M for the latticed shell i And stable bearing capacity C i 。
After the rigidity value of the current checked node is adjusted to meet the set rigidity condition each time, the steel quantity M for the latticed shell is recalculated i And stable bearing capacity C i 。
Step 205, judging the recalculated steel amount M for the reticulated shell i And stable bearing capacity C i Whether the optimization condition is met; if so, go to step 206; otherwise, returning to step 203, checking whether the stiffness value of the next node meets the corresponding stiffness condition.
Step 206, recording the design parameters after the adjustment, wherein the design parameters comprise the recalculated steel consumption M of the latticed shell i And stable bearing capacity C i 。
That is, the section of the rod piece is adjusted for each node to ensure that the rigidity value of the node meets the requirement, and then the steel amount M for the current latticed shell is used i And stable bearing capacity C i And judging whether the optimization conditions are met, if so, keeping the current design parameters as candidate items, and otherwise, discarding the current design parameters.
In an embodiment of the present invention, the optimization condition may include any one or more of the following:
(1) recalculated steel amount M for latticed shell i Less than the initial steel amount M 0 ；
(2) Recalculated stable bearing capacity C i Greater than the initial stable bearing capacity C 0 ；
(3) Ratio M of recalculated steel usage amount to recalculated stable bearing capacity i /C i Less than the ratio M of the initial steel consumption to the initial stable bearing capacity 0 /C 0 。
Of course, in practical applications, it may be preferable to satisfy the above three conditions simultaneously in order to obtain better design parameters.
And step 207, after the adjustment of the cross sections of the rod pieces is completed according to the rigidity values of all the sequence numbers in the rigidity sequence, determining a stable optimization result of the latticed shell according to the recorded design parameters after each adjustment.
Specifically, the ratio M of the steel consumption of the latticed shell and the stable bearing capacity after each adjustment can be calculated according to the recorded design parameters after each adjustment i /C i And taking the design parameter corresponding to the minimum ratio as the stable optimization result of the latticed shell.
According to the method for optimizing the dynamic stability of the single-layer spherical reticulated shell structure, provided by the embodiment of the invention, in the process of optimizing and analyzing the stability of the single-layer spherical reticulated shell structure, the rigidity of the nodes of the reticulated shell structure is calculated, the node instability sequence is judged according to the calculated rigidity value of the nodes, and the steel quantity of the reticulated shell structure is minimized on the premise of meeting the standard requirements, particularly meeting the structural nonlinear stability performance requirements by adjusting the section size of the rod piece. That is, the section of the rod is adjusted for each node to enable the rigidity value of the node to meet the requirement, and then whether the node meets the optimization condition is judged according to the current steel consumption and stable bearing capacity of the latticed shell, if so, the current design parameters can be reserved as candidate design parameters, otherwise, the current design parameters can be discarded. And after all the node rigidity values meet the requirements, selecting the optimal design parameters from the recorded candidate design parameters, so that the finally designed single-layer spherical reticulated shell structure has the advantages of dynamic stability and minimum steel consumption.
It should be noted that the single-layer spherical reticulated shell structure according to the embodiment shown in fig. 2 is a single-layer spherical reticulated shell structure that is obtained through engineering design and meets the relevant industry regulations. In practical application, when the single-layer spherical reticulated shell structure does not meet the relevant industry regulations, the design parameters may be adjusted to meet the relevant industry regulations, and then the design parameters are optimized according to the method shown in fig. 2.
As shown in fig. 3, another flowchart of the method for optimizing dynamic stability of a single-layer spherical reticulated shell structure according to an embodiment of the present invention includes the following steps:
step 301, calculating the stable bearing capacity of the single-layer spherical reticulated shell structure.
Wherein, the stable bearing capacity of the single-layer spherical reticulated shell structure comprises: the rod piece of the single-layer spherical reticulated shell structure stabilizes the bearing capacity and/or stabilizes the bearing capacity integrally.
And 302, if the stable bearing capacity does not meet the requirement, adjusting the section area of the rod piece of the single-layer spherical reticulated shell structure until the single-layer spherical reticulated shell structure meets the requirement.
The above-described adjustment process will be described in detail later.
Step 303, determining the initial steel consumption M of the single-layer spherical reticulated shell structure 0 And initial stable bearing capacity C 0 。
And 304, calculating the rigidity of each node of the single-layer spherical reticulated shell structure, and sequencing the rigidity values obtained through calculation from small to large in sequence to obtain a rigidity sequence.
And 305, sequentially checking whether the rigidity value of each node in the rigidity sequence meets a set rigidity condition, and adjusting the section of the rod piece when the rigidity value of each node in the rigidity sequence does not meet the set rigidity condition until the rigidity value of the currently checked node meets the set rigidity condition.
Step 306, recalculating the steel amount M for the latticed shell i And a stable bearingLoad capacity C i 。
Step 307, judging the recalculated steel amount M for the reticulated shell i And stable bearing capacity C i Whether the optimization condition is met; if so, go to step 308; otherwise, return to step 305 to check whether its stiffness value satisfies the corresponding stiffness condition for the next node.
Step 308, recording the design parameters after the adjustment, wherein the design parameters comprise the recalculated steel consumption M of the latticed shell i And stable bearing capacity C i 。
Step 309, after adjusting the cross section of the rod member according to the stiffness values of all the sequence numbers in the stiffness sequence, determining a stable optimization result of the latticed shell according to the recorded design parameters after each adjustment.
In the method for optimizing the dynamic stability of the single-layer spherical reticulated shell structure, during the process of optimizing and analyzing the stability of the single-layer spherical reticulated shell structure, the size of the cross section of a rod piece is adjusted to enable the single-layer spherical reticulated shell structure to meet the standard specified by the relevant industry, then the rigidity value of each node is checked one by one aiming at the single-layer spherical reticulated shell structure, the cross section of the rod piece is adjusted to enable the rigidity value of the node to meet the requirement, after the rigidity value of the corresponding node is checked to meet the requirement each time, whether the optimization condition is met or not is judged according to the steel amount and the stable bearing capacity of the current reticulated shell, the design parameters meeting the optimization condition are reserved as candidate items, and the design parameters which are not met are discarded. And after all the node rigidity values meet the requirements, selecting the optimal design parameters from the recorded candidate design parameters, so that the finally designed single-layer spherical reticulated shell structure has the advantages of dynamic stability and minimum steel consumption.
As shown in fig. 4, the flowchart of the embodiment of the present invention for adjusting the preliminary design model of the single-layer spherical reticulated shell structure to meet the relevant industry regulations includes the following steps;
step 401, obtaining a preliminary design model of the single-layer spherical reticulated shell structure and design parameters thereof.
And step 402, calculating the slenderness ratio and the internal force of the lever according to the design parameters.
Step 403, determining whether the single rod stability check calculation is established, that is, checking whether the single rod stability meets the relevant industry regulations. If so, go to step 404; otherwise, step 405 is performed.
Step 404, determining whether the overall stability check calculation of the latticed shell is established, that is, checking whether the overall stability of the latticed shell meets the relevant industry regulations. If so, go to step 406; otherwise, step 405 is performed.
Step 405, increasing the rod cross-sectional area, and then performing step 402.
And step 406, obtaining a single-layer spherical reticulated shell structure which meets the relevant standard, namely the single-layer spherical reticulated shell structure with the design parameters.
According to the scheme of the invention, according to a instability mechanism and an expansion mechanism of an instability region of the latticed shell structure (namely, the instability of the latticed shell can be started from a node with the minimum node rigidity value to cause the rigidity values of adjacent nodes around to be reduced, and the adjacent nodes are sequentially destabilized to form the instability region), the cross section of the lever part is gradually increased to obtain the optimal parameters of the single-layer spherical latticed shell structure with the dynamic stability and the minimum steel consumption, so that effective guidance is provided for engineering design, the steel consumption of the single-layer spherical latticed shell structure can be minimized on the premise of meeting the requirement of the nonlinear stability performance of the structure, and the material cost is effectively reduced.
Those skilled in the art will appreciate that all or part of the steps in the above method embodiments may be implemented by a program to instruct relevant hardware to perform the steps, and the program may be stored in a computer-readable storage medium, referred to herein as a storage medium, such as: ROM/RAM, magnetic disk, optical disk, etc.
Correspondingly, the embodiment of the invention also provides a device for the method for optimizing the dynamic stability performance of the single-layer spherical reticulated shell structure, and the device is an electronic device, such as a mobile terminal, a computer, a tablet device, a personal digital assistant and the like. The electronic device may include one or more processors, memory; wherein the memory is used for storing computer executable instructions and the processor is used for executing the computer executable instructions to realize the method of the previous embodiments.
The present invention has been described in detail with reference to the embodiments, and the description of the embodiments is provided to facilitate the understanding of the method and apparatus of the present invention, and is intended to be a part of the embodiments of the present invention rather than the whole embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without making any creative effort shall fall within the protection scope of the present invention, and the content of the present specification shall not be construed as limiting the present invention. Therefore, any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (7)

1. A method for optimizing dynamic stability of a single-layer spherical reticulated shell structure is characterized by comprising the following steps:
determining initial steel consumption M of single-layer spherical reticulated shell structure 0 And initial stable bearing capacity C 0 ；
Calculating the rigidity of each node of the single-layer spherical reticulated shell structure, and sequencing the rigidity values obtained by calculation from small to large in sequence to obtain a rigidity sequence;
the node stiffness is calculated by adopting the following formula:
Figure FDA0003798475490000011
Figure FDA0003798475490000012
Figure FDA0003798475490000013
wherein m is the total number of nodes of the reticulated shell, i is the node number, and i is more than or equal to 1 and less than or equal to m; n is connected to the node iJ is more than or equal to 1 and less than or equal to n; alpha is alpha ij Is the angle between the jth rod piece connected with the node i and the tangent plane of the node i, E is the elastic modulus of the rod piece material, A j Is the cross-sectional area of the jth rod piece, S node，min Is the minimum node stiffness value, S node，max Is the maximum node stiffness value;
sequentially checking whether the rigidity value of each node in the rigidity sequence meets a set rigidity condition, and adjusting the section of the rod piece when the rigidity value of each node in the rigidity sequence does not meet the set rigidity condition until the rigidity value of the currently checked node meets the set rigidity condition;
recalculating the amount of Steel M for the reticulated shells i And stable bearing capacity C i ；
If the recalculated steel amount M for the reticulated shell is used i And stable bearing capacity C i If the optimization condition is met, recording the design parameters after the adjustment, wherein the design parameters comprise the recalculated steel consumption M of the latticed shell i And stable bearing capacity C i ；
And after adjusting the section of the rod piece according to the rigidity values of all the nodes in the rigidity sequence, determining a stable optimization result of the latticed shell according to the recorded design parameters after each adjustment.
2. The method of claim 1, wherein said making rod cross-section adjustments comprises:
increasing the area of the cross section of the rod piece according to a set step length;
and recalculating the rigidity of each node, and reordering the nodes from small to large in sequence according to the calculated rigidity values to obtain a rigidity sequence after the section of the rod piece is adjusted.
3. The method of claim 1, wherein the stiffness condition is: the difference value between the rigidity value of the current checked node and the reference rigidity value is smaller than a set threshold value; the reference rigidity value is the rigidity value with the smallest difference with the rigidity value of the currently checked node.
4. The method of claim 1, wherein the optimization condition comprises any one or more of:
(1) recalculated steel amount M for latticed shell i Less than the initial steel amount M 0 ；
(2) Recalculated stable bearing capacity C i Greater than the initial stable bearing capacity C 0 ；
(3) Ratio M of recalculated steel usage amount to recalculated stable bearing capacity i /C i Less than the ratio M of the initial steel consumption to the initial stable bearing capacity 0 /C 0 。
5. The method of claim 1, wherein determining a net-shell stability optimization result based on the recorded adjusted design parameters comprises:
and calculating the ratio of the steel consumption of the reticulated shell and the stable bearing capacity after each adjustment according to the recorded design parameters after each adjustment, and taking the design parameter corresponding to the minimum ratio as the stabilization optimization result of the reticulated shell.
6. Method according to any of claims 1 to 5, characterized in that the amount of steel M used in the initial screening of a determined single-layer spherical screening structure is M 0 And initial stable bearing capacity C 0 Before, still include:
calculating the stable bearing capacity of the single-layer spherical reticulated shell structure;
and if the stable bearing capacity does not meet the requirement, adjusting the section area of the rod piece of the single-layer spherical reticulated shell structure until the single-layer spherical reticulated shell structure meets the requirement.
7. The method of claim 6, wherein the stable load bearing capacity of the single layer spherical reticulated shell structure comprises: the rod piece of the single-layer spherical reticulated shell structure stabilizes the bearing capacity and/or stabilizes the bearing capacity integrally.
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