CN116341325B - Pier anti-collision facility design method and system - Google Patents
Pier anti-collision facility design method and system Download PDFInfo
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Abstract
The invention discloses a pier anti-collision facility design method and system. Firstly, an acquisition module acquires a bow stiffness curve and an accurate stiffness curve of an anti-collision facility. Then, the determining module determines a simplified stiffness curve of the anti-collision facility through the accurate stiffness curve of the anti-collision facility, and a corresponding relation between the simplified stiffness curve of the anti-collision facility and structural parameters of the anti-collision facility. And then, the construction module constructs a bridge collision simplified model, and reduces the number of ship units, so that the time is effectively saved, and the design efficiency is improved. And then, the analysis module performs finite element analysis on the bridge collision simplified model according to the collision avoidance facility simplified stiffness curve and the bow stiffness curve, and determines a reasonable stiffness curve corresponding to the collision avoidance facility. Finally, the design module combines the reasonable stiffness curve and the corresponding relation between the anti-collision facility simplified stiffness curve and the structural parameters of the anti-collision facility, and reversely determines the design parameters of the anti-collision facility.
Description
Technical Field
The invention relates to the technical field of computer aided design, in particular to a pier anti-collision facility design method and system.
Background
The pier attachment type anti-collision facility is arranged outside the pier and jointly bears side impact with the pier, absorbs energy through the internal honeycomb energy dissipation components, has the advantages of small occupied space, wide protection range, no influence of water depth and the like, and is most widely applied to the national anti-collision of the pier. A trapezoid honeycomb energy consumption protection structure is formed at present, and is shown in (a) of fig. 5; the composite material cylindrical lattice honeycomb protective structure takes polyurethane foam as a core material and glass fiber reinforced resin composite material as a surface layer and a web plate, and is shown in (b) of fig. 5; the honeycomb box-type protective structure lined with the octagonal and cylindrical energy dissipation members is shown in fig. 5 (c).
However, the design of the anti-collision facility at present mainly depends on engineering experience of researchers, firstly predicts the structure and the scale, and then repeatedly adjusts the structure and the scale through fine numerical simulation until the protection requirement is met. Each adjustment requires a re-establishment of a bridge collision model for finite element analysis, and the number of units of the bridge collision model often reaches hundreds of thousands. Therefore, each analysis takes 10 to 30 hours to solve by using the supercomputer, resulting in low design efficiency.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention provides a pier anti-collision facility design method and system, which can improve the design efficiency. The specific technical scheme is as follows:
in a first aspect, a method for designing an anti-collision facility of a pier is provided, including:
acquiring a bow stiffness curve and an anti-collision facility accurate stiffness curve;
determining an anti-collision facility simplified stiffness curve through the anti-collision facility accurate stiffness curve, and a corresponding relation between the anti-collision facility simplified stiffness curve and structural parameters;
constructing a bridge collision simplified model;
analyzing the bridge collision simplified model based on the collision avoidance facility simplified stiffness curve and the bow stiffness curve, and determining a reasonable stiffness curve corresponding to the collision avoidance facility;
and reversely determining design parameters of the anti-collision facility by combining the corresponding relation and the reasonable stiffness curve.
With reference to the first aspect, in a first implementation manner of the first aspect, based on the principles of shape similarity and area equality, the collision avoidance facility simplified stiffness curve is determined by using a tri-fold model according to the collision avoidance facility accurate stiffness curve.
With reference to the first aspect, in a second implementation manner of the first aspect, a corresponding relationship between the simplified stiffness curve of the anti-collision facility and the structural parameter is determined by using a parameter analysis fitting method.
With reference to the first aspect, in a third implementation manner of the first aspect, the determining a reasonable stiffness curve corresponding to the collision avoidance device includes:
based on the principle of equal energy, adjusting the platform force and/or the plastic energy consumption triggering force of the bridge collision simplified model;
analyzing the adjusted bridge collision simplified model according to the collision avoidance facility simplified stiffness curve and the bow stiffness curve, and determining a stiffness curve corresponding to the collision avoidance facility;
the method comprises the steps of circulating in this way, and determining a stiffness curve corresponding to the anti-collision facility under the impact of ships with different tonnages and different speeds;
and screening out reasonable stiffness curves from all the stiffness curves according to anti-collision reduction requirements and anti-collision facility scale limits.
With reference to the first aspect, in a fourth implementation manner of the first aspect, the method further includes:
and constructing a bridge collision simplified model based on the design parameters, and verifying the bridge collision simplified model.
In a second aspect, there is provided a pier collision avoidance design system, comprising:
the acquisition module is configured to acquire a bow stiffness curve and an anti-collision facility accurate stiffness curve;
the determining module is configured to determine an anti-collision facility simplified stiffness curve through the anti-collision facility accurate stiffness curve and a corresponding relation between the anti-collision facility simplified stiffness curve and the structural parameters;
the construction module is configured to construct a bridge collision simplified model;
the analysis module is configured to analyze the bridge collision simplified model based on the collision avoidance facility simplified stiffness curve and the bow stiffness curve and determine a reasonable stiffness curve corresponding to the collision avoidance facility;
and the design module is configured to reversely determine the design parameters of the anti-collision facility by combining the corresponding relation and the reasonable stiffness curve.
With reference to the second aspect, in a first implementation manner of the second aspect, the determining module determines the simplified stiffness curve of the collision avoidance device by using a tri-fold model according to the accurate stiffness curve of the collision avoidance device based on the principles of shape similarity and area equality.
With reference to the second aspect, in a second implementation manner of the second aspect, the determining module determines a correspondence between the simplified stiffness curve of the collision avoidance facility and the structural parameter by using a parameter analysis fitting method.
With reference to the second aspect, in a third implementation manner of the second aspect, the analysis module includes:
an adjusting unit configured to adjust a platform force and/or a plastic energy consumption triggering force of the bridge collision simplified model based on an energy equality principle;
the analysis unit is configured to analyze the adjusted bridge collision simplified model according to the collision avoidance facility simplified stiffness curve and the bow stiffness curve, and determine a stiffness curve corresponding to the collision avoidance facility;
the method comprises the steps of circulating in this way, and determining a stiffness curve corresponding to the anti-collision facility under the impact of ships with different tonnages and different speeds;
and the screening unit is configured to screen out reasonable stiffness curves from all the stiffness curves according to the anti-collision reduction requirements and the anti-collision facility scale limit.
With reference to the second aspect, in a fourth implementation manner of the second aspect, the method further includes a verification module configured to construct a bridge collision simplified model based on the design parameters, and verify the bridge collision simplified model.
The beneficial effects are that: by adopting the bridge pier anti-collision facility design method and system, the simplified bridge collision simplified model can be subjected to finite element analysis based on the anti-collision facility simplified stiffness curve and the bow stiffness curve, the number of units of the bridge collision simplified model is small, and the calculation efficiency is far higher than that of a refined contact collision model. Therefore, in the preliminary design stage of the pier attachment type anti-collision facility scheme, the bridge collision simplified model is adopted, so that time can be effectively saved while certain precision is ensured, and the design efficiency is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described. Throughout the drawings, the elements or portions are not necessarily drawn to actual scale.
FIG. 1 is a flow chart of a method for designing a pier collision avoidance device according to an embodiment of the present invention;
FIG. 2 is a flow chart of determining a reasonable stiffness curve for a collision avoidance system according to one embodiment of the present invention;
FIG. 3 is a block diagram of a pier collision avoidance design system according to an embodiment of the present invention;
FIG. 4 is a system block diagram of an analysis module according to an embodiment of the present invention;
FIG. 5 is a schematic view of the structure of three conventional anti-collision facilities;
FIG. 6 is a schematic view of a bow stiffness curve;
FIG. 7 is a schematic diagram of a precision stiffness curve of a collision avoidance and a simplified stiffness curve of the collision avoidance;
FIG. 8 is a simplified model schematic of a bridge collision;
FIG. 9 is a schematic diagram of a refined contact collision model;
FIG. 10 is a schematic diagram showing a comparison of the calculation accuracy of a simplified model of a bridge collision and the calculation accuracy of a refined contact collision model;
FIG. 11 is a schematic diagram showing the comparison of the calculation efficiency of a simplified model of a bridge collision and the calculation efficiency of a refined contact collision model;
fig. 12 is a schematic diagram of a stiffness curve corresponding to the collision avoidance facility under the impact of ships with different tonnages and different speeds.
Detailed Description
Embodiments of the technical scheme of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present invention, and thus are merely examples, and are not intended to limit the scope of the present invention.
The method for designing the pier collision avoidance facility shown in fig. 1 comprises the following steps:
step 1, acquiring a bow stiffness curve and an accurate stiffness curve of an anti-collision facility;
step 2, determining an anti-collision facility simplified stiffness curve through the anti-collision facility accurate stiffness curve, and a corresponding relation between the anti-collision facility simplified stiffness curve and structural parameters;
step 3, constructing a bridge collision simplified model;
step 4, analyzing the bridge collision simplified model based on the collision avoidance facility simplified stiffness curve and the bow stiffness curve, and determining a reasonable stiffness curve corresponding to the collision avoidance facility;
and 5, reversely determining design parameters of the anti-collision facility by combining the corresponding relation and the reasonable stiffness curve.
Specifically, first, a bow stiffness curve can be obtained by constructing a ship collision stiffness wall finite element model for analysis. And obtaining an accurate rigidity curve of the anti-collision facility constructed by the internal honeycomb of the anti-collision facility through a quasi-static crushing test, wherein the obtained bow rigidity curve and the obtained accurate rigidity curve of the anti-collision facility are respectively shown in fig. 6 and 7. A bump facility simplified stiffness curve may then be determined based on the bump facility accurate stiffness curve. And the corresponding relation between the simplified rigidity curve of the anti-collision facility and structural parameters of the anti-collision facility, such as the pore diameter, the wall thickness, the length, the layer number and the like of the honeycomb is determined through parameter analysis, so that a foundation is provided for the subsequent determination of the design parameters of the anti-collision facility.
And then, a simplified model of the ship-collision avoidance facility-pier collision system can be constructed, and a bridge collision simplified model can be established. In this embodiment, a nonlinear compression spring can be used to simulate the crushing deformation of the bow and the collision avoidance facilities in the collision, and the established bridge collision simplified model is shown in fig. 8. Compared with the refined contact collision model shown in fig. 9, the ship unit order of magnitude in the refined model can be reduced from 20 tens of thousands to 14 with the bridge collision simplified model.
Then, an 8-core 32-bit LSDYNA971 solver can be adopted, finite element analysis is carried out on the bridge collision simplified model according to the collision avoidance facility simplified stiffness curve and the stem stiffness curve, and a reasonable stiffness curve corresponding to the collision avoidance facility is determined. The calculation accuracy of the bridge collision simplified model is shown in fig. 10, and it can be seen from fig. 10 that the calculation accuracy of the bridge collision simplified model is not greatly different from that of the refined contact collision model, and it can be seen that certain accuracy can be ensured by adopting the bridge collision simplified model for calculation.
As shown in fig. 11, the calculation efficiency of the bridge collision simplified model is far greater than that of the refined contact collision model as can be seen from fig. 11. Therefore, the adoption of the bridge collision simplified model can effectively save time and improve design efficiency while ensuring certain precision.
Finally, through the reasonable stiffness curve selected by screening and the corresponding relation between the previously determined simplified stiffness curve of the anti-collision facility and the structural parameters of the anti-collision facility, the design parameters of the anti-collision facility can be reversely determined.
In this embodiment, optionally, based on the principles of shape similarity and area equality, the simplified stiffness curve of the collision avoidance facility is determined by using a tri-fold model according to the accurate stiffness curve of the collision avoidance facility. In particular, a tri-fold model may be used to determine a simplified stiffness curve for the anti-collision facility based on a principle of shape similarity and area equality to the exact curve. Wherein, k of the simplified rigidity curve of the anti-collision facility 1 、k 2 Respectively keep consistent with the accurate rigidity curve of the anti-collision facility, and the load of the platform section isDetermined from the equality of the areas.
I.e.
Wherein F (D) is a simplified rigidity curve of the anti-collision facility, k 1 Is the slope of the elastic segment, k 2 To compact the slope of the segment, d 1 At the maximum value of elastic deformation d 2 At the maximum of plastic deformation d 3 For maximum compaction, b is the intersection of the compaction segment line with the x-axis.
In this embodiment, optionally, a parameter analysis fitting method is used to determine a correspondence between the simplified stiffness curve of the anti-collision facility and the structural parameters. Specifically, a large number of parameter analyses can be used to obtain different pore diameters d, different wall thicknesses delta, lengths l and layer numbers n respectively at the slope k of the elastic section 1 Slope k of compacted section 2 Maximum value d of elastic deformation 1 Maximum value d of plastic deformation 2 . And then fitting to obtain a correlation function relation. The method is obtained through a plurality of parameter analyses:
in this embodiment, optionally, as shown in fig. 2, in step 4, determining a reasonable stiffness curve corresponding to the collision avoidance device includes:
step 4-1, adjusting the platform force and/or the plastic energy consumption triggering force of the bridge collision simplified model based on the principle of equal energy;
step 4-2, analyzing the adjusted bridge collision simplified model according to the collision avoidance facility simplified stiffness curve and the bow stiffness curve, and determining a stiffness curve corresponding to the collision avoidance facility;
step 4-3, repeating the steps 4-1 to 4-2, and determining a corresponding stiffness curve of the anti-collision facility under the impact of ships with different tonnages and different speeds;
and 4-4, screening out reasonable stiffness curves from all the stiffness curves according to anti-collision reduction requirements and anti-collision facility scale restrictions.
Specifically, first, the platform force in the bridge collision simplified model may be adjusted based on the principle of equal energy, or the plastic energy consumption trigger force may be adjusted, or the platform force and the plastic energy consumption trigger force may be adjusted. As shown in fig. 12, the energy equality means that the areas of the light area and the dark area in the figure are equal. And then, carrying out finite element analysis on the adjusted bridge collision simplified model according to the collision avoidance facility simplified stiffness curve and the bow stiffness curve to obtain a stiffness curve corresponding to the collision avoidance facility.
And then, readjusting the platform force in the bridge collision simplified model, or adjusting the plastic energy consumption triggering force, or adjusting the platform force and the plastic energy consumption triggering force, and carrying out finite element analysis again. This is repeated until the design requirements are met. Finally, the mutual restriction of the anti-collision reduction requirement and the anti-collision facility scale limitation can be regulated according to the design, namely, the higher the reduction effect is, the larger the anti-collision facility scale is, and the higher the manufacturing cost is. And screening out reasonable rigidity curves of the anti-collision facility from all the obtained rigidity curves.
In this embodiment, optionally, the method further includes: and constructing a bridge collision simplified model based on the design parameters, and verifying the bridge collision simplified model.
Specifically, after the design parameters of the anti-collision facility are determined by adopting the design method, a bridge collision simplified model can be constructed according to the determined design parameters for verification so as to ensure the design accuracy.
A system block diagram of a pier collision avoidance design system as shown in fig. 3, the design system comprising:
the acquisition module is configured to acquire a bow stiffness curve and an anti-collision facility accurate stiffness curve;
the determining module is configured to determine an anti-collision facility simplified stiffness curve through the anti-collision facility accurate stiffness curve and a corresponding relation between the anti-collision facility simplified stiffness curve and the structural parameters;
the construction module is configured to construct a bridge collision simplified model;
the analysis module is configured to analyze the bridge collision simplified model based on the collision avoidance facility simplified stiffness curve and the bow stiffness curve and determine a reasonable stiffness curve corresponding to the collision avoidance facility;
and the design module is configured to reversely determine the design parameters of the anti-collision facility by combining the corresponding relation and the reasonable stiffness curve.
Specifically, the design system consists of an acquisition module, a determination module, a construction module, an analysis module, a design module and a verification module.
The acquisition module can be used for analyzing by constructing a ship collision rigid wall finite element model to obtain a ship bow rigidity curve. And obtaining an accurate rigidity curve of the anti-collision facility constructed by the internal honeycomb of the anti-collision facility through a quasi-static crushing test.
The determination module may determine a collision avoidance simplification stiffness curve based on the collision avoidance precision stiffness curve. And the corresponding relation between the simplified rigidity curve of the anti-collision facility and the structural parameters of the anti-collision facility, such as the pore diameter, the wall thickness, the length, the layer number and the like of the honeycomb is determined through parameter analysis, and a foundation is provided for determining the design parameters of the anti-collision facility for the subsequent modules.
The construction module can construct a simplified model of the ship-collision avoidance facility-pier collision system, and establish a bridge collision simplified model so as to reduce the number of ship units. In this embodiment, the building module may employ a nonlinear compression spring to simulate the crushing deformation of the bow and the crash-proof facility during a crash.
The analysis module can adopt an 8-core 32-bit LSDYNA971 solver to carry out finite element analysis on the bridge collision simplified model according to the collision avoidance facility simplified stiffness curve and the stem stiffness curve, and determine a reasonable stiffness curve corresponding to the collision avoidance facility. The time is effectively saved while certain precision is ensured, and the design efficiency is improved.
The design module can reversely determine the design parameters of the anti-collision facility through the screened reasonable stiffness curve and the corresponding relation between the accurate stiffness curve of the anti-collision facility determined by the previous determination module and the structural parameters of the anti-collision facility.
In this embodiment, optionally, the determining module may determine the simplified stiffness curve of the collision avoidance facility by using a tri-fold model based on the principles of shape similarity and area equality according to the accurate stiffness curve of the collision avoidance facility.
In this embodiment, optionally, the determining module may further determine a correspondence between the simplified stiffness curve of the anti-collision facility and the structural parameter by using the above-mentioned parameter analysis fitting method.
In this embodiment, optionally, as shown in fig. 4, the analysis module includes:
an adjusting unit configured to adjust a platform force and/or a plastic energy consumption triggering force of the bridge collision simplified model based on an energy equality principle;
the analysis unit is configured to analyze the adjusted bridge collision simplified model according to the collision avoidance facility simplified stiffness curve and the bow stiffness curve, and determine a stiffness curve corresponding to the collision avoidance facility;
the method comprises the steps of circulating in this way, and determining a stiffness curve corresponding to the anti-collision facility under the impact of ships with different tonnages and different speeds;
and the screening unit is configured to screen out reasonable stiffness curves from all the stiffness curves according to the anti-collision reduction requirements and the anti-collision facility scale limit.
In particular, the adjustment unit may adjust the platform force in the bridge crash simplified model, or adjust the plastic energy consuming trigger force, or adjust the platform force and the plastic energy consuming trigger force, based on the energy equality principle. The analysis unit can carry out finite element analysis on the adjusted bridge collision simplified model according to the collision avoidance facility simplified stiffness curve and the bow stiffness curve to obtain a stiffness curve corresponding to the collision avoidance facility. The adjusting unit is used for readjusting the platform force in the bridge collision simplified model, or adjusting the plastic energy consumption triggering force, or adjusting the platform force and the plastic energy consumption triggering force, and the analyzing unit is used for carrying out finite element analysis on the bridge collision simplified model adjusted by the adjusting unit. Repeating the steps until the design requirement is met. The screening unit can be based on the mutual restriction of the anti-collision reduction requirement and the anti-collision facility scale limitation specified by the design, namely, the higher the reduction effect is, the larger the anti-collision facility scale is, and the higher the manufacturing cost is. And screening out reasonable rigidity curves of the anti-collision facility from all the obtained rigidity curves.
In this embodiment, optionally, the method further includes a verification module configured to construct a bridge collision simplified model based on the design parameters and verify the bridge collision simplified model.
Specifically, after the design module determines the design parameters of the anti-collision facility, the verification module can construct a bridge collision simplified model according to the determined design parameters to verify so as to ensure the design accuracy.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention, and are intended to be included within the scope of the appended claims and description.
Claims (4)
1. A pier anti-collision facility design method is characterized by comprising the following steps:
acquiring a bow stiffness curve and an anti-collision facility accurate stiffness curve;
determining a simplified stiffness curve of the anti-collision facility through the accurate stiffness curve of the anti-collision facility, determining a corresponding relation between the simplified stiffness curve of the anti-collision facility and structural parameters by adopting a parameter analysis fitting method, and fitting to obtain a correlation function relation as follows;
wherein d is the pore diameter, delta is the wall thickness, and l isLength, n is the number of layers, k 1 Slope, k of elastic segment of stiffness curve for collision avoidance facility simplification 2 To the slope of the compacted section d 1 Is the maximum value of elastic deformation, d 2 Is the maximum plastic deformation;
constructing a bridge collision simplified model;
analyzing the bridge collision simplified model based on the collision avoidance facility simplified stiffness curve and the bow stiffness curve, and determining a reasonable stiffness curve corresponding to the collision avoidance facility;
reversely determining design parameters of the anti-collision facility by combining the corresponding relation and the reasonable stiffness curve;
based on the principles of shape similarity and area equality, determining a simplified stiffness curve of the anti-collision facility by adopting a three-fold line model according to the accurate stiffness curve of the anti-collision facility;
the determining of the reasonable stiffness curve corresponding to the anti-collision facility comprises the following steps:
based on the principle of equal energy, adjusting the platform force and/or the plastic energy consumption triggering force of the bridge collision simplified model;
analyzing the adjusted bridge collision simplified model according to the collision avoidance facility simplified stiffness curve and the bow stiffness curve, and determining a stiffness curve corresponding to the collision avoidance facility;
the method comprises the steps of circulating in this way, and determining a stiffness curve corresponding to the anti-collision facility under the impact of ships with different tonnages and different speeds;
and screening out reasonable stiffness curves from all the stiffness curves according to anti-collision reduction requirements and anti-collision facility scale limits.
2. The pier collision avoidance apparatus design method of claim 1, further comprising:
and constructing a bridge collision simplified model based on the design parameters, and verifying the bridge collision simplified model.
3. A pier collision avoidance system, comprising:
the acquisition module is configured to acquire a bow stiffness curve and an anti-collision facility accurate stiffness curve;
the determining module is configured to determine an anti-collision facility simplified stiffness curve through the anti-collision facility accurate stiffness curve, and determine a corresponding relation between the anti-collision facility simplified stiffness curve and the structural parameter by adopting a parameter analysis fitting method, wherein the fitting result is that a related function relation is obtained;
wherein d is the aperture, delta is the wall thickness, l is the length, n is the number of layers, k 1 Slope, k of elastic segment of stiffness curve for collision avoidance facility simplification 2 To the slope of the compacted section d 1 Is the maximum value of elastic deformation, d 2 Is the maximum plastic deformation;
the construction module is configured to construct a bridge collision simplified model;
the analysis module is configured to analyze the bridge collision simplified model based on the collision avoidance facility simplified stiffness curve and the bow stiffness curve and determine a reasonable stiffness curve corresponding to the collision avoidance facility;
the design module is configured to reversely determine the design parameters of the anti-collision facility by combining the corresponding relation and the reasonable stiffness curve;
the determining module is used for determining the simplified stiffness curve of the anti-collision facility by adopting a three-fold line model according to the accurate stiffness curve of the anti-collision facility based on the principles of shape similarity and area equality;
the analysis module comprises:
an adjusting unit configured to adjust a platform force and/or a plastic energy consumption triggering force of the bridge collision simplified model based on an energy equality principle;
the analysis unit is configured to analyze the adjusted bridge collision simplified model according to the collision avoidance facility simplified stiffness curve and the bow stiffness curve, and determine a stiffness curve corresponding to the collision avoidance facility;
the method comprises the steps of circulating in this way, and determining a stiffness curve corresponding to the anti-collision facility under the impact of ships with different tonnages and different speeds;
and the screening unit is configured to screen out reasonable stiffness curves from all the stiffness curves according to the anti-collision reduction requirements and the anti-collision facility scale limit.
4. The pier collision avoidance design system of claim 3, further comprising a verification module configured to construct a bridge collision reduction model based on the design parameters and verify the bridge collision reduction model.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310308814.0A CN116341325B (en) | 2023-03-27 | 2023-03-27 | Pier anti-collision facility design method and system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310308814.0A CN116341325B (en) | 2023-03-27 | 2023-03-27 | Pier anti-collision facility design method and system |
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| CN116341325A CN116341325A (en) | 2023-06-27 |
| CN116341325B true CN116341325B (en) | 2024-01-30 |
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