Integrated design method and system for shield segment groove and waterproof elastic sealing gasket

Abstract

The present invention discloses a method and system for the integrated design of shield segment grooves and waterproof elastic sealing pads, comprising: determining parameters to be optimized for size optimization based on an initial design scheme of the shield segment grooves; describing the outer contour shape of the elastic sealing pads and the holes in the initial design scheme, creating a topological optimization design region, and establishing a finite element model; establishing a groove model in the finite element model to simulate the interaction between the shield segment grooves and the waterproof elastic sealing pads; calculating the waterproof capability of the waterproof sealing pads, and iteratively optimizing the calculated results, with the optimized results being used for the design of the shield segment grooves and waterproof elastic sealing pads. The present invention can achieve simultaneous optimization of the outer contours and holes of the shield segment grooves and the elastic sealing pad sections, obtaining a sealing pad design scheme that meets design requirements and production process requirements, and to a certain extent overcomes the problems of low efficiency in the design of existing shield joint waterproof sealing pads and the disconnection between the segment structure design and the waterproof design.

Description

Technical Field

[0001] The present invention relates to a shield segment groove and a waterproof elastic sealing pad in the technical field of shield tunnel joint waterproofing, and in particular to a shield segment groove and waterproof elastic sealing pad integrated design method and system. Background Art

[0002] The joints between shield tunnel segments are a relatively weak link in the waterproofing system. Currently, domestic shield tunnel joints primarily utilize EPDM rubber (ethylene propylene diene monomer) for waterproofing. This water-stopping effect is achieved by improving the cross-sectional shape of the segment grooves and gaskets and creating holes within the gaskets to control contact surface stress.

[0003] At present, the cross-sectional design method for shield tunnel grooves and joint elastic sealing gaskets is mainly based on experience, and the designs of segment grooves and sealing gaskets are relatively independent, which leads to low efficiency and poor economy. In addition, it is often difficult to obtain the groove and sealing gasket cross-sectional forms that meet the design requirements.

[0004] After searching, Chinese patent application CN202110673139.2 discloses a shield tunnel segment joint sealing gasket cross-section optimization method and system, which mainly studies the microscopic morphology of the sealing gasket, establishes a microscopic leakage channel model, and uses the leakage rate as an important indicator to evaluate the cross-sectional shape of the sealing gasket. At the same time, it adopts structural optimization constraints such as compression force that matches the actual working conditions, and complete evaluation indicators such as leakage rate, average contact stress, and maximum contact stress to avoid the adverse consequences caused by ignoring certain aspects during the optimization of the cross-sectional shape of the sealing gasket. However, this method is still a trial-and-error method, and has the shortcomings of low efficiency and poor economy of traditional sealing gasket design methods. It also cannot solve the disconnection between the structural design of the pipe segment and the waterproof design. It is difficult to simultaneously obtain grooves and sealing gasket cross-sectional forms that meet the design requirements. Summary of the Invention

[0005] In view of the defects in the prior art, the purpose of the present invention is to provide a method and system for the integrated design of shield segment grooves and waterproof elastic sealing gaskets, which can simultaneously obtain groove and sealing gasket cross-sectional forms that meet the design requirements.

[0006] According to one aspect of the present invention, a method for integrated design of shield segment grooves and waterproof elastic sealing gaskets is provided, comprising:

[0007] According to the initial design of the shield segment groove, the groove shape is parameterized to determine the parameters to be optimized for size optimization;

[0008] Using parameterized curves to describe the outer contour shape of the elastic sealing gasket and the holes in the initial design, creating a topology optimization design region, and establishing a finite element model;

[0009] Establishing a groove model in the finite element model, and simulating the interaction between the shield segment groove and the waterproof elastic sealing gasket in the finite element model;

[0010] The waterproof capability of the waterproof sealing gasket is calculated using a finite element method, and the calculation result is iteratively optimized using an optimization algorithm to obtain an optimized result, wherein the optimized result includes: the numerical value of the parameter to be optimized, the outer contour of the sealing gasket, and the explicit expression of the parameterized curve of the hole;

[0011] According to the optimization results, the shield segment groove and waterproof elastic sealing gasket are designed to achieve synchronous optimization of the shield segment groove and the waterproof elastic sealing gasket cross-section outer contour and holes.

[0012] Optionally, a parameterized curve is used to describe the shield segment groove shape, the outer contour of the waterproof sealing gasket section and the initial hole plan of the waterproof sealing gasket.

[0013] Optionally, simulating the interaction between the segment groove and the waterproof elastic sealing gasket in the finite element model includes:

[0014] Setting boundary conditions of the finite element model to establish contact between the sealing gasket and the groove, contact between the upper and lower sealing gaskets, and self-contact of the sealing gasket; applying all degree of freedom constraints to the outer surface of the lower groove of the shield segment, applying vertical displacement boundary conditions to the outer surface of the upper groove of the shield segment, and ensuring that the waterproof elastic sealing gasket reaches an initial contact state;

[0015] The vertical displacement is applied to the upper groove to simulate the installation process of the waterproof elastic sealing gasket, and the horizontal displacement is applied to simulate the staggered seam of the waterproof elastic sealing gasket.

[0016] Optionally, simulating the interaction between the segment groove and the waterproof elastic sealing gasket in the finite element model further includes:

[0017] Using pressure penetration technology, fluid pressure penetration load is applied to the contact surface between the groove and the sealing gasket and the contact surface between the upper and lower sealing gaskets;

[0018] Optionally, simulating the interaction between the segment groove and the waterproof elastic sealing gasket in the finite element model further includes:

[0019] Fluid-solid coupling technology is used to specify the initial fluid area and establish a coupling model including grooves, sealing gaskets and fluids. Pressure is applied to the fluid through displacement loading to simulate the fluid penetration process.

[0020] Optionally, setting structural optimization constraints in the finite element model includes:

[0021] Structural optimization constraints are set, the reaction force on the outer surface of the groove on the segment is not greater than the assembly force of the shield machine, and is not greater than the assembly force that causes damage to the shield segment groove; the hole size meets the manufacturing process requirements; and the groove size meets the design range.

[0022] Optionally, when using pressure penetration technology, structural optimization constraints are set, the reaction force on the outer surface of the groove on the segment is not greater than the assembly force of the shield machine, and is not greater than the assembly force that causes damage to the shield segment groove; the hole size meets the manufacturing process requirements; the groove size meets the design range; the maximum contact stress of the contact surface between the groove and the sealing gasket and the contact surface of the upper and lower sealing gaskets are both greater than 0.

[0023] Optionally, when using fluid-solid coupling technology, structural optimization constraints are set, the reaction force on the outer surface of the groove on the segment is not greater than the assembly force of the shield machine, and is not greater than the assembly force that causes damage to the shield segment groove; the hole size meets the manufacturing process requirements; the groove size meets the design range; the joint seepage is not greater than the upper limit of the engineering waterproofing standard.

[0024] Optionally, when predicting the waterproofing pressure of the sealing gasket using contact stress, structural optimization constraints are set: the reaction force on the outer surface of the groove on the segment is no greater than the shield machine assembly force and no greater than the assembly force that causes damage to the shield segment groove; the hole size meets the manufacturing process requirements; the groove size is within the design range; and the function of the contact stress Pc is greater than the waterproofing pressure. Pc is the minimum median contact stress of multiple contact surfaces, or the minimum value of the average contact stress of multiple contact surfaces.

[0025] Optionally, when using pressure penetration technology, structural optimization constraints are set, the reaction force on the outer surface of the groove on the segment is not greater than the assembly force of the shield machine, and is not greater than the assembly force that causes damage to the shield segment groove; the hole size meets the manufacturing process requirements; the groove size meets the design range; the fluid pressure penetration load P1 is greater than the waterproof pressure.

[0026] Optionally, when using fluid-solid coupling technology, structural optimization constraints are set, the reaction force on the outer surface of the groove on the segment is not greater than the assembly force of the shield machine, and is not greater than the assembly force that causes damage to the shield segment groove; the hole size meets the manufacturing process requirements; the groove size meets the design range; the fluid pressure P2 is greater than the waterproof pressure.

[0027] Optionally, for the integrated design method of shield segment groove and waterproof elastic sealing gasket, an objective function is set to obtain the following:

[0028] Set the first objective function, the contact stress Pc function is the maximum value, Pc is the minimum median contact stress of multiple contact surfaces, or is the minimum value of the average contact stress of multiple contact surfaces; or,

[0029] Set the second objective function so that the fluid pressure penetration load P1 is the maximum value; or

[0030] Set the third objective function so that the fluid pressure P2 is the maximum value; or

[0031] The fourth objective function is set to minimize the groove area A.

[0032] According to a second aspect of the present invention, a shield segment groove and waterproof elastic sealing gasket integrated design system is provided, comprising:

[0033] Module for determining parameters to be optimized: Based on the initial design of the shield segment trench, the trench shape is parameterized to determine the parameters to be optimized for size optimization;

[0034] Finite element model building module: using parameterized curves to describe the outer contour shape of the elastic sealing gasket and the holes of the initial design scheme, creating a topology optimization design area, and building a finite element model;

[0035] Interaction module: establishing a groove model in the finite element model, and simulating the interaction between the shield segment groove and the waterproof elastic sealing gasket in the finite element model;

[0036] Design optimization module: iteratively optimizes the simulation results of the interaction module to obtain optimized results, which include: the numerical values ​​of the parameters to be optimized, the outer contour of the sealing gasket, and the explicit expression of the hole parameterized curve;

[0037] Final design module: Based on the optimization results of the design optimization module, the shield segment groove and waterproof elastic sealing gasket are designed.

[0038] According to a third aspect of the present invention, an electronic terminal is provided, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, the processor is used to execute the above-mentioned method for integrated design of shield segment grooves and waterproof elastic sealing pads, or to run the above-mentioned system for integrated design of shield segment grooves and waterproof elastic sealing pads.

[0039] According to a fourth aspect of the present invention, a computer-readable storage medium is provided, on which a computer program is stored. When the program is executed by a processor, it is used to execute the above-mentioned integrated design method of shield segment grooves and waterproof elastic sealing pads, or to run the above-mentioned integrated design system of shield segment grooves and waterproof elastic sealing pads.

[0040] Compared with the prior art, the embodiments of the present invention have at least one of the following beneficial effects:

[0041] The integrated design method and system of shield segment grooves and waterproof elastic sealing gaskets provided by the present invention can avoid relying on empirical design of elastic sealing gaskets by adopting the structural optimization in the above steps, and solve the technical problems of low efficiency, poor economy and non-optimal results of conventional sealing gasket designs.

[0042] The integrated design method and system for shield segment grooves and waterproof elastic sealing pads provided by the present invention can simulate the actual working state of the sealing pads by adopting multi-body optimization technology, thereby solving the technical problem of inconsistency between the single-body optimization model and the actual situation.

[0043] The integrated design method and system of shield segment grooves and waterproof elastic sealing pads provided by the present invention adopt the joint analysis technology of size optimization and topology optimization, which can realize the integrated and synchronous optimization design of the segment grooves, the outer contours of the sealing pads and the holes, and solve the problem of disconnection between the joint waterproof design and the structural design.

[0044] The integrated design method and system for shield segment grooves and waterproof elastic sealing pads provided by the present invention adopt pressure penetration simulation analysis, which can realize direct simulation of the coupling effects of joint closing, opening and seepage, and solve the technical problem of unclear limit state of joint waterproof analysis.

[0045] The integrated design method and system of shield segment grooves and waterproof elastic sealing pads provided by the present invention introduces shield engineering waterproofing standards due to structural optimization constraints, which can achieve refined quantitative control of sealing pad optimization and solve the problem that the waterproof capacity of joints is difficult to quantitatively determine.

[0046] In summary, through the organic coordination of the above-mentioned technologies, the present invention can achieve the synchronous optimization of the outer contour and holes of the shield segment groove and the elastic sealing gasket cross-section, and obtain a sealing gasket design scheme that meets the design requirements and production process requirements, overcoming the technical problems of low efficiency, poor economy, and disconnection between structural design and waterproof design in the existing technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Other features, objects and advantages of the present invention will become more apparent upon reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0048] Figure 1 This is a flow chart of a method for integrated design of shield segment grooves and waterproof elastic sealing gaskets in one embodiment of the present invention;

[0049] Figure 2 This is an overall schematic diagram of a shield segment groove design scheme in one embodiment of the present invention;

[0050] Figure 3 A schematic diagram of the outer contour of a sealing gasket in one embodiment of the present invention;

[0051] Figure 4 Schematic diagram of the topology optimization area of ​​the design method in one embodiment of the present invention;

[0052] Figure 5 This is a schematic diagram of an initial scheme of a sealing gasket in one embodiment of the present invention;

[0053] Figure 6 Schematic diagram of the relationship between the elastic sealing gasket and the shield segment groove in one embodiment of the present invention;

[0054] Figure 7 Schematic diagram of the interaction between the elastic sealing gasket and the shield segment groove in one embodiment of the present invention;

[0055] Figure 8 Schematic diagram of the segment groove pattern finally optimized in one embodiment of the present invention;

[0056] Figure 9 This is a schematic diagram of a sealing gasket solution finally optimized in one embodiment of the present invention;

[0057] Figure 10 A schematic diagram of applying an external load using pressure penetration technology in one embodiment of the present invention;

[0058] Figure 11 Schematic diagram of simulation analysis using fluid-structure coupling technology in one embodiment of the present invention. DETAILED DESCRIPTION

[0059] The present invention will be described in detail below with reference to specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those skilled in the art, several variations and improvements can be made without departing from the scope of the present invention. These all fall within the scope of protection of the present invention.

[0060] It should be understood that the terms "first", "second", etc. in the following embodiments are used to distinguish different objects rather than to describe a specific order. The terms "include" and "comprising" used indicate the presence of the described features, wholes, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or their collections. In the description of this specification, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of description and simplified description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0061] The existing design method for the cross-section of shield tunnel grooves and joint elastic sealing gaskets is mainly based on experience, and the design of the segment grooves and sealing gaskets is relatively independent. It has the disadvantages of low efficiency, poor economy, and disconnection between structural design and waterproofing design. It is often difficult to obtain the groove and sealing gasket cross-section that meets the design requirements.

[0062] In response to one of the above problems, an embodiment of the present invention provides an integrated design method for shield segment grooves and waterproof elastic sealing gaskets.

[0063] Reference Figure 1 FIG. 1 is a flow chart of a method for integrated design of shield segment grooves and waterproof elastic sealing pads according to this embodiment. The method includes steps S100 to S500:

[0064] S100, parameterizing the trench shape according to the initial design scheme of the shield segment trench and determining parameters to be optimized for size optimization;

[0065] In this step, a parameterized curve can be used to describe the shield segment groove design scheme and determine the parameters to be optimized, where the parameters to be optimized can be the size parameters to be optimized for the shield segment groove.

[0066] In this step, the parameterized curve may be a spline curve or other types of parameterized curves, and the specific selection may be based on actual conditions.

[0067] S200 uses parameterized curves to describe the outer contour of the elastic sealing gasket and the holes in the initial design, creates a topology optimization design area, and builds a finite element model;

[0068] In this step, the parameterized curve may be a B-spline curve.

[0069] In this step, the finite element model can be a straight seam working condition, a T-shaped seam working condition or a cross seam working condition.

[0070] In this step, a parameterized curve, such as a B-spline curve, may be used to describe the outer contour of the sealing gasket, and topology optimization may be performed by using the parameterized curve to describe the outer contour of the sealing gasket.

[0071] In this step, a parameterized curve, such as a B-spline curve, can be used to describe the shape of the gasket hole. The parameterized curve can be used to describe the initial scheme of holes with mixed shapes to carry out topology optimization.

[0072] In this step, based on the outer contours of the shield segment grooves and elastic gaskets, a topology optimization design region is created, meshing is performed, and a finite element mesh model is established. The segment grooves will be used for dimensional optimization in subsequent simulations, while the region enclosed by the elastic gaskets will be the subject of topology optimization. Existing finite element software such as ANSYS and ABAQUS can be used.

[0073] This step, together with step S100, is used for subsequent joint analysis of size optimization and topology optimization, thereby realizing the integrated and synchronous optimization design of the segment grooves, the outer contour of the sealing gasket, and the holes, solving the problem of disconnection between joint waterproofing and structural form design.

[0074] S300, establishing a groove model in the finite element model, and simulating the interaction between the shield segment groove and the waterproof elastic sealing gasket in the finite element model;

[0075] In this step, the groove model can be simulated using a rigid body, linear elastic or elastoplastic model as needed, and a finite element model of the groove can be established based on the parameters to be optimized, and these parameters serve as initial values ​​for optimization.

[0076] S400, calculating the waterproof capability of the waterproof sealing gasket using a finite element method, and iteratively optimizing the calculation results using an optimization algorithm to obtain optimized results, the optimization results including: numerical values ​​of parameters to be optimized, an outer contour of the sealing gasket, and explicit expressions of parameterized curves of the holes;

[0077] In this step, the values ​​of the parameters to be optimized include the size parameter values ​​of the shield segment groove.

[0078] In this step, the numerical values ​​of the parameters to be optimized, the gasket outer contour, and the explicit expressions of the hole parameterized curves are derived from simulation analysis within the finite element model. This simulation can be repeated multiple times, with the result that meets the set conditions being considered the optimization result. Specifically, simulation iterations can be performed within a general optimization design platform, with the explicit analysis module selected and geometric nonlinear analysis configured.

[0079] S500, based on the optimization results, designs the shield segment grooves and waterproof elastic sealing gaskets, achieving simultaneous optimization of the outer contours and holes of the shield segment grooves and waterproof elastic sealing gasket sections.

[0080] In this step, after obtaining the explicit expressions of the segment groove size parameters, the outer contour of the sealing gasket and the B-spline curve of the hole based on the optimization design results, the shapes of the segment groove, the outer contour of the sealing gasket and the hole can be determined based on the above size parameters and expressions. The results can be directly imported into the CAD system to design the segment groove and the elastic sealing gasket section. This can achieve simultaneous optimization of the outer contour and holes of the shield segment groove and the elastic sealing gasket section, and obtain a sealing gasket design scheme that meets the design requirements and production process requirements.

[0081] In order to realistically simulate the stress state of the sealing gasket and solve the problem of inconsistency between the single-unit optimization model and the actual situation, in some preferred embodiments, when executing S300, simulating the interaction between the segment sealing groove and the waterproof elastic sealing gasket in the finite element model may include:

[0082] S301, setting boundary conditions of the finite element model to establish contact between the gasket and the groove, contact between the upper and lower gaskets, and self-contact of the gasket; applying all degree of freedom constraints to the outer surface of the lower groove of the shield segment, applying vertical displacement boundary conditions to the outer surface of the upper groove of the shield segment, and ensuring that the waterproof elastic gasket reaches an initial contact state;

[0083] S302, applying vertical displacement to the upper groove to simulate the installation process of the waterproof elastic sealing gasket, and applying horizontal displacement to simulate the staggered seam of the waterproof elastic sealing gasket.

[0084] The above embodiment adopts multi-body optimization technology and simulates in various ways to truly simulate the stress state of the sealing gasket, thereby solving the problem of inconsistency between the single-body optimization model and the actual situation.

[0085] Furthermore, in order to better simulate the stress state of the gasket, in some embodiments, when executing S302, the interaction between the segment sealing groove and the waterproof elastic gasket is simulated in the finite element model, which further includes: using pressure penetration technology to apply fluid pressure penetration loads to the contact surface between the groove and the gasket and the contact surface between the upper and lower gaskets. In some embodiments, fluid-solid coupling technology can also be used to specify the initial area of ​​the fluid, establish a coupling model including the groove, gasket and fluid, and apply pressure to the fluid through displacement loading to simulate the fluid penetration process. By using pressure penetration simulation analysis and fluid-solid coupling analysis, direct simulation of the coupling effect of joint closing, opening and seepage can be achieved, solving the problem of unclear limit state of joint waterproof analysis.

[0086] In the above embodiment, the upper and lower sealing gasket contact surfaces are the contact surfaces of the upper sealing gasket and the lower sealing gasket; the groove contacts the lower outer surface of the sealing gasket, and the top surface of the upper sealing gasket contacts the top surface of the lower sealing gasket.

[0087] The above-mentioned embodiment of the present invention utilizes multi-body optimization technology. During the optimization process, the upper and lower segment grooves and the upper and lower waterproof gaskets are optimized simultaneously. This allows for a realistic simulation of the gasket stress state, resolving the issue of inconsistency between the single-body optimization model and actual conditions.

[0088] In order to simulate the actual working conditions more closely, in some embodiments, when executing S302, the interaction between the pipe segment sealing groove and the waterproof elastic sealing gasket is simulated in the finite element model, and the setting of the materials of each part can be further included. By setting the materials, a more realistic simulation result can be obtained.

[0089] Specifically, in one embodiment, the segment groove material can be set in the finite element model. For example, the model used for the segment groove material can be a rigid body, linear elastic or elastic-plastic model. Of course, if there are other situations, they can also be selected according to actual conditions.

[0090] Specifically, in another embodiment, the elastic sealing gasket material can be configured in the finite element model. For example, the Mooney-Rivlin model can be used to configure the normal and tangential contact characteristics of the contact surface in the finite element model. Of course, if there are other situations, the selection can also be made based on the actual situation.

[0091] In order to better adapt to fluid simulation conditions, in some embodiments, in addition to the above-mentioned tube groove material settings and elastic sealing gasket material settings, it can further include the settings of fluid material parameters, such as fluid density, viscosity, fluid velocity, etc.

[0092] The above-mentioned embodiment of the present invention takes into account various situations and conditions by setting some materials and fluid material parameters, thereby avoiding reliance on empirical design and solving the problems of low efficiency and poor economy of conventional sealing gasket design.

[0093] Based on the above embodiment, the contact between the sealing gasket and the groove, the contact between the upper and lower sealing gaskets, and the self-contact of the sealing gasket are established; the boundary conditions of all degree of freedom constraints are applied to the outer surface of the groove of the shield segment, and the vertical displacement boundary conditions are applied to the outer surface of the groove of the upper shield segment. The following settings can be used:

[0094] Structural optimization constraints are set, the reaction force on the outer surface of the groove on the segment is not greater than the assembly force of the shield machine, and is not greater than the assembly force that causes damage to the shield segment groove; the hole size meets the manufacturing process requirements; and the groove size meets the design range.

[0095] Specifically, the contact between the sealing gasket and the groove, the contact between the upper and lower sealing gaskets, and the self-contact of the sealing gasket are established; the vertical displacement boundary condition is applied to the outer surface of the groove on the shield segment. Specifically, the initial opening amount and the dislocation amount are calculated based on the initial state of the waterproof elastic sealing gasket. In the finite element model calculation, the vertical displacement is applied to the outer surface of the groove on the shield segment, and the horizontal displacement is applied to the groove on the segment, so that the waterproof elastic sealing gasket can reach the initial contact state.

[0096] The structural optimization constraints set in the above embodiments of the present invention ensure that the hole size meets the manufacturing process requirements and the groove size meets the design range, which can ensure that the simulation conforms to the actual working conditions and obtains results that meet the design requirements.

[0097] In the structural optimization constraint condition setting of the above embodiment, the contact stress Pc, the fluid pressure penetration load P1 or the fluid pressure P2 are obtained by setting corresponding objective functions.

[0098] For example, in some embodiments, a first objective function can be set for the contact stress Pc, where the contact stress Pc function is the maximum value, where Pc is the minimum median contact stress of multiple contact surfaces, or the minimum value of the average contact stress of multiple contact surfaces. Based on previous research and engineering experience, the greater the contact stress, the stronger the waterproof capability of the sealing gasket.

[0099] For example, for the fluid pressure penetration load P1, a second objective function can be set to maximize the fluid pressure penetration load P1 while satisfying the constraint that the maximum contact stresses on the contact surface between the groove and the gasket and on the contact surface between the upper and lower gaskets are both greater than 0. When using pressure penetration technology, as the fluid pressure increases, the initial contact surfaces will gradually separate, resulting in a contact force of 0. When the contact surfaces are completely separated, the contact stress of the entire contact surface will become 0.

[0100] For example, a third objective function can be set for fluid pressure P2, maximizing fluid pressure P2 while satisfying the constraint that joint seepage does not exceed the upper limit of shield engineering waterproofing standards. Existing numerical simulations and experiments to determine gasket waterproofing pressure are all tied to contact stress. This design in this embodiment enables refined quantitative control of gasket optimization based on shield engineering waterproofing standards, resolving the difficulty in quantitatively determining joint waterproofing capacity.

[0101] The fourth objective function is set to minimize the groove area A. This function can ensure that the design requirements are met, the groove area is minimized, and the weakening of the segment structure is minimized.

[0102] The above-mentioned objective functions have corresponding relationships with the loaded simulation methods and constraints, and their specific expressions can be set according to requirements.

[0103] The above embodiment of the present invention can provide a range of shield segment sealing gasket groove shapes and sizes based on the needs of the target project, optimize the segment grooves, sealing gasket outer contours, and holes when the external load (assembly force) does not exceed the limit value, and generate an optimized segment groove and elastic sealing gasket design scheme, so that the sealing gasket achieves maximum waterproofing capability and meets the design requirements. The above embodiment of the present invention can achieve synchronous optimization of the shield segment grooves and the elastic sealing gasket cross-section outer contours and holes through the organic coordination of the above-mentioned technologies, and obtain a sealing gasket design scheme that meets the design requirements and production process requirements, thereby overcoming the technical problems of low efficiency, poor economy, and disconnection between structural design and waterproofing design in the existing technology.

[0104] The above-mentioned preferred features of the present invention can be used in any combination as long as they do not conflict with each other. By combining finite element method with size optimization and explicit topology optimization, the sealing gasket can achieve the maximum waterproof capability. Among them, the explicit topology optimization method uses B-spline curves to describe the outer contour of the elastic sealing gasket and the holes of the initial design scheme, and combines the parameterized shield segment groove shape to establish a finite element model. The general finite element simulation platform is used as the simulation solver, the explicit analysis module is selected, and the geometric nonlinear analysis is set. Through size optimization and topology optimization design, the shield segment groove parameters, the outer contour of the sealing gasket and the hole B-spline curve explicit expression are obtained, thereby determining the integrated design of the shield segment groove and the waterproof elastic sealing gasket that meets the design requirements.

[0105] Based on the same technical concept, in another embodiment of the present invention, a shield segment groove and waterproof elastic sealing gasket integrated design system is provided, comprising:

[0106] Module for determining parameters to be optimized: Based on the initial design of the shield segment trench, the trench shape is parameterized to determine the parameters to be optimized for size optimization;

[0107] Finite element model building module: Uses parametric curves to describe the outer contour shape of the elastic sealing gasket and the holes in the initial design scheme, creates a topology optimization design area, and builds a finite element model;

[0108] Interaction module: establishes a groove model in the finite element model to simulate the interaction between the shield segment groove and the waterproof elastic sealing gasket in the finite element model;

[0109] Design optimization module: It iteratively optimizes the simulation results of the interaction module to obtain the optimized results. The optimization results include: the numerical values ​​of the parameters to be optimized, the outer contour of the gasket, and the explicit expression of the parameterized curve of the hole;

[0110] Final design module: Based on the optimization results of the design optimization module, the shield segment groove and waterproof elastic sealing gasket are designed.

[0111] The various modules of the above-mentioned shield segment groove and waterproof elastic sealing gasket integrated design system of the present invention correspond to the various steps of the shield segment groove and waterproof elastic sealing gasket integrated design method. The specific implementation technology can be referred to and will not be repeated here.

[0112] Topology optimization is a method of designing material distribution within a given design domain to optimize certain performance indicators based on load and structural optimization constraints. Most topology optimization studies are conducted under the implicit topology optimization framework. There are many design variables, and the optimized design results usually need post-processing before they can be imported into the CAD / CAE system. The present invention adopts explicit topology optimization technology, using holes that can be explicitly described as the primitives of the structure, and obtains the optimal topology of the structure through its movement, deformation, intersection and overlap. In this explicit method, the structural topology description and the finite element analysis grid are independent of each other. Therefore, by deleting the degrees of freedom of the finite element nodes in the holes, the convergence problem of the finite element analysis during the optimization iteration process can be directly and effectively alleviated. This method can greatly reduce the number of design variables, has a natural advantage in considering geometric features and structural optimization design problems that are sensitive to boundary responses, and the optimized design results can be seamlessly connected with the CAD / CAE system. In addition, the present invention goes a step further and adopts multi-body structural optimization technology and combined size optimization and topology optimization technology to achieve integrated and synchronous optimization design of segment grooves, sealing gasket outer contours and holes, solving the problem of disconnection between joint waterproofing design and structural design.

[0113] In order to better understand the solutions of the present invention, a detailed schematic description is provided below in combination with a number of preferred specific application examples. However, it should be understood that the present invention is not limited to the following specific application examples.

[0114] Example 1

[0115] In this specific example, the integrated design method of shield segment grooves and waterproof elastic sealing gaskets includes the following steps:

[0116] Step 1: Use parameterized curves to describe the shield segment groove design scheme and determine the size optimization parameters;

[0117] Reference Figure 2 The following is the design scheme of the segment groove in this example, which is described by a parametric curve:

[0118]

[0119] Where x and y are the horizontal and vertical coordinates on the boundary curve of the segment groove, x i (i=0,1,2,3,4) is the horizontal coordinate of the segment groove curve control point, k i (i=1,5), is the slope of the segment groove curve, hi (i=1,2), segment groove depth.

[0120] Step 2: Use B-spline curves to describe the outer contour of the elastic sealing gasket and the holes in the initial design, create a topology optimization design area, and build a finite element mesh model. The model can be a straight seam condition, a T-slit condition, or a cross seam condition.

[0121] In this embodiment, a parameterized curve can be used to describe the outer contour shape of the sealing gasket, and a parameterized curve can be used to describe an initial solution of holes with mixed shapes to carry out topology optimization.

[0122]

[0123] Where P i =(x i ,y i ) T (i=0, ..., n) is the coordinate of the control point of the closed B-spline curve, and n is the number of control points. i,k(u) is the k-order B-spline curve basis function of the corresponding i-th control point, which is composed of a monotone non-decreasing real number sequence U={u0,u1,…,u m}(m=n+k+1) is generated.

[0124] like Figure 3 The outer contour of the sealing gasket is shown in the figure. Figure 4 The outer contour of the sealing gasket and its surrounding area are the areas that need to be optimized in this embodiment. The outer contour of the sealing gasket and the holes in the initial design can be given based on the design experience of existing projects and literature. For example, Figure 5 As shown, a sealing gasket solution with initial outer contour and structural holes is shown. Figure 5 There are multiple holes with uniform diameters in the initial structure, but in practice, the holes can be arbitrary, such as different shapes, sizes, arrangements, and quantities. Similarly, the initial outer contour can also be set according to actual needs / products and is not limited to Figure 5 The outer contour is shown in . Ultimately, it is necessary to determine the explicit expressions of the segment groove size parameters, gasket outer contour, and hole B-spline curve to determine the final design solution.

[0125] Step 3: Create a groove model in the finite element model to simulate the interaction between the segment sealing groove and the waterproof sealing gasket. Specifically, it includes:

[0126] (1) Setting the boundary conditions of the finite element model to establish the contact between the gasket and the groove, the contact between the upper and lower gaskets, and the self-contact of the gasket; applying all degree of freedom constraints on the outer surface of the lower groove, applying vertical displacement boundary conditions on the outer surface of the upper groove, and making the gasket reach the initial contact state;

[0127] In finite element model analysis, contact is typically simulated using contact pairs. Create contact pairs between the gasket and the upper and lower grooves, as well as the gasket's self-contact, and set the contact properties. Apply all degrees of freedom constraints to the outer surface of the lower groove. To ensure the gasket reaches initial contact, gradually apply vertical displacement boundary conditions until the gasket makes contact with the groove surface.

[0128] (2) Applying vertical displacement to the upper groove simulates the installation process of the gasket, and applying horizontal displacement to simulate the staggered seam of the gasket;

[0129] (3) Set the material

[0130] Set the segment groove material, which can be set to rigid body, linear elastic or elastic-plastic model.

[0131] Set the elastic sealing gasket material, adopt the Mooney-Rivlin model, and set the normal and tangential contact characteristics of the contact surface in the finite element model.

[0132] (4) Setting structural optimization constraints

[0133] Structural optimization constraints are set, the reaction force on the outer surface of the groove on the segment is not greater than the assembly force of the shield machine, and is not greater than the assembly force that causes damage to the shield segment groove; the hole size meets the manufacturing process requirements; and the groove size meets the design range.

[0134] Step 4: Set the optimization objective function in the finite element model

[0135] Set the first objective function, contact stress function P c is the maximum value. c It is the minimum median contact stress of multiple contact surfaces, or the minimum value of the average contact stress of multiple contact surfaces.

[0136] Reference Figure 6 The figure shows the relationship between the elastic sealing gasket and the shield segment groove. The shield segment groove is located at Figure 6 In the middle, the elastic sealing gasket on the outside of the segment is located in the groove of the shield segment.

[0137] Reference Figure 7 The figure shows the schematic diagram of the finite element simulation model. Figure 7 The model can simulate the interaction between the elastic sealing gasket and the shield segment groove and the mechanical requirements, and thus optimize the Figure 4The area to be optimized is shown in .

[0138] Step 5: Perform simulation iterative calculations in the general optimization design platform, select the explicit analysis module, and set up geometric nonlinear analysis to obtain the optimized design results.

[0139] Step 6: Based on the optimization design results, the segment groove size parameters, the gasket outer contour and the explicit B-spline curve expressions of the holes are obtained. The shapes of the segment groove, gasket outer contour and holes can be determined based on the above size parameters and expressions. The results can be directly imported into the CAD system to perform segment groove and elastic gasket cross-section design.

[0140] Reference Figure 8 The figure shows the schematic diagram of the segment groove scheme finally optimized in the first embodiment. Figure 9 As shown in FIG. , it is a schematic diagram of the sealing gasket solution finally optimized in the first embodiment of the present invention. Figure 9 As shown in , in the sealing gasket solution finally obtained in this embodiment, the holes include various shapes and sizes.

[0141] It can be seen from the above that through steps 1 to 6, this embodiment realizes the synchronous optimization of the outer contour and holes of the shield segment groove and the elastic sealing gasket cross-section, and can simultaneously obtain the groove and sealing gasket cross-section forms that meet the design requirements, which is more in line with the needs of actual applications.

[0142] Example 2

[0143] In this specific application example, a method for integrating shield segment grooves and waterproof elastic sealing gaskets is provided, wherein steps 1, 2, 5, and 6 can be performed in the same manner as steps 1, 2, 5, and 6 in Example 1, with the difference being steps 3 and 4. In this embodiment, steps 3 and 4 are as follows:

[0144] Step 3: Create a groove model in the finite element model to simulate the interaction between the segment sealing groove and the waterproof sealing gasket;

[0145] Specifically, step 3 includes:

[0146] (1) Setting the boundary conditions of the finite element model to establish the contact between the gasket and the groove, the contact between the upper and lower gaskets, and the self-contact of the gasket; applying all degree of freedom constraints on the outer surface of the lower groove, applying vertical displacement boundary conditions on the outer surface of the upper groove, and making the gasket reach the initial contact state;

[0147] (2) Applying vertical displacement to the upper groove simulates the installation process of the gasket, and applying horizontal displacement to simulate the staggered seam of the gasket;

[0148] In the finite element model, the upper and lower gaskets and the gasket and the groove are all set to be in surface contact. The pressure penetration technology is used. For details, please refer to Figure 10 The diagram shows the operation of applying external load by pressure penetration technology. Figure 10 As can be seen from the figure, pressure penetration can be applied from different angles / directions, including at least at the interface between the groove and the gasket, and at the interface between the groove and the upper and lower gaskets. Compared to existing pressure penetration methods that only apply in one direction or at a single angle, the results obtained in this embodiment are more in line with practical application requirements.

[0149] This example uses the above-mentioned pressure penetration simulation analysis to achieve direct simulation of joint closing and opening, solving the technical problem of unclear limit state of joint waterproof analysis.

[0150] (3) Set the material

[0151] In this step, the segment groove material is set, which can be set to a rigid body, linear elastic, or elastic-plastic model. Furthermore, the elastic sealing gasket material is set, and the Mooney-Rivlin model is used to set the normal and tangential contact characteristics of the contact surface in the finite element model.

[0152] (4) Setting structural optimization constraints

[0153] In this step, structural optimization constraints are set: the reaction force on the outer surface of the groove on the segment is no greater than the assembly force of the shield machine, and no greater than the assembly force that causes damage to the shield segment groove; the hole size meets the manufacturing process requirements; the groove size meets the design range; the maximum contact stress between the groove and the sealing gasket contact surface and the upper and lower sealing gasket contact surfaces are both greater than 0.

[0154] Step 4: Set the optimization objective function in the finite element model

[0155] The second objective function is set so that the fluid pressure penetration load P1 is the maximum value.

[0156] As the fluid pressure penetration load P1 increases, the contact surface gradually expands, and the contact area gradually decreases until one contact surface completely separates, causing the gasket to lose its waterproofing function. At this point, the fluid pressure penetration load P1 reaches its maximum value. Using fluid pressure penetration technology can more realistically simulate the situation of a gasket being subjected to lateral water pressure, reflecting the process of gasket expansion under water pressure until waterproofing failure, which is more consistent with actual conditions.

[0157] Through the above operations, this embodiment can truly simulate the stress state of the sealing gasket through the simulation and condition setting of the above multiple pressures, and solve the problem of inconsistency between the single-body optimization model and the actual situation.

[0158] Example 3

[0159] In this specific application example, a method for integrating shield segment grooves and waterproof elastic sealing gaskets is provided, wherein steps 1, 2, 5, and 6 can be performed in the same manner as steps 1, 2, 5, and 6 in Example 1, with the difference being steps 3 and 4. In this embodiment, steps 3 and 4 are as follows:

[0160] Step 3: Create a groove model in the finite element model to simulate the interaction between the segment sealing groove and the waterproof sealing gasket;

[0161] Specifically, they include:

[0162] (1) Setting the boundary conditions of the finite element model to establish the contact between the gasket and the groove, the contact between the upper and lower gaskets, and the self-contact of the gasket; applying all degree of freedom constraints on the outer surface of the lower groove, applying vertical displacement boundary conditions on the outer surface of the upper groove, and making the gasket reach the initial contact state;

[0163] (2) Applying vertical displacement to the upper groove simulates the installation process of the gasket, and applying horizontal displacement to simulate the staggered seam of the gasket;

[0164] Fluid-solid coupling technology is used to specify the initial fluid area and establish a coupling model including grooves, sealing gaskets and fluids. Pressure is applied to the fluid through displacement loading to simulate the fluid penetration process.

[0165] Reference Figure 11 Figure 2 shows a schematic diagram of a simulation analysis using fluid-structure coupling technology. This simulation allows for direct simulation of seepage coupling, analysis of the development of joint seepage, and determination of the gasket's waterproof limit state.

[0166] (3) Set the material

[0167] Set the segment groove material, which can be set to rigid body, linear elastic or elastic-plastic model.

[0168] The elastic sealing gasket material is set, the Mooney-Rivlin model is adopted, and the normal and tangential contact characteristics of the contact surface in the finite element model are set.

[0169] Set fluid material parameters, such as fluid density, viscosity, fluid velocity and other parameters.

[0170] (4) Setting structural optimization constraints

[0171] Structural optimization constraints are set, the reaction force on the outer surface of the groove on the segment is not greater than the assembly force of the shield machine, and is not greater than the assembly force that causes damage to the shield segment groove; the hole size meets the manufacturing process requirements; the groove size meets the design range; the joint seepage is not greater than the upper limit of the engineering waterproofing standard.

[0172] Step 4: Set the optimization objective function in the finite element model

[0173] The third objective function is set so that the fluid pressure P2 takes the maximum value.

[0174] As the fluid pressure load P2 gradually increases, the contact surfaces between the groove and the gasket, and between the gaskets themselves, gradually expand, and the seepage rate in the micropores between the contact surfaces gradually increases. As P2 continues to increase, when the joint seepage rate reaches the upper limit allowed by the waterproofing standard, the gasket is considered to have achieved its waterproofing capability, and at this point, P2 reaches its maximum value.

[0175] In the above steps of this embodiment, fluid-structure interaction technology is used to effectively optimize the design of the segments and gaskets through simulation analysis, improving their performance and reliability. Furthermore, the structural optimization constraints incorporate shield engineering waterproofing standards, linking them to the design and enhancing practicality. This allows for precise quantitative control of gasket optimization, resolving the difficulty in quantitatively determining joint waterproofing capabilities.

[0176] Example 4

[0177] In this specific application example, a method for integrating shield segment grooves and waterproof elastic sealing gaskets is provided, wherein steps 1, 2, 5, and 6 can be performed in the same manner as steps 1, 2, 5, and 6 in Example 1, with the difference being steps 3 and 4. In this embodiment, steps 3 and 4 are as follows:

[0178] Step 3: Create a groove model in the finite element model to simulate the interaction between the segment sealing groove and the waterproof sealing gasket;

[0179] Specifically, they include:

[0180] (1) Setting the boundary conditions of the finite element model to establish the contact between the gasket and the groove, the contact between the upper and lower gaskets, and the self-contact of the gasket; applying all degree of freedom constraints on the outer surface of the lower groove, applying vertical displacement boundary conditions on the outer surface of the upper groove, and making the gasket reach the initial contact state;

[0181] (2) Applying vertical displacement to the upper groove simulates the installation process of the gasket, and applying horizontal displacement to simulate the staggered seam of the gasket.

[0182] (3) Set the material

[0183] Set the segment groove material, which can be set to rigid body, linear elastic or elastic-plastic model.

[0184] The elastic sealing gasket material is set, the Mooney-Rivlin model is adopted, and the normal and tangential contact characteristics of the contact surface in the finite element model are set.

[0185] (4) Setting structural optimization constraints

[0186] In this step, the sealing gasket waterproofing pressure is predicted using contact stress. Structural optimization constraints are set: the reaction force on the outer surface of the groove on the segment is no greater than the shield machine assembly force and no greater than the assembly force that would cause damage to the shield segment groove; the hole size meets the manufacturing process requirements; the groove size is within the design range; and the function of the contact stress Pc is greater than the waterproofing pressure. Pc is the minimum median contact stress across multiple contact surfaces, or the minimum average contact stress across multiple contact surfaces.

[0187] Step 4: Set the optimization objective function in the finite element model

[0188] In this step, the fourth objective function is set so that the groove area A is minimized.

[0189] Example 5

[0190] In this specific application example, a method for integrating shield segment grooves and waterproof elastic sealing gaskets is provided, wherein steps 1, 2, 4, 5, and 6 can be performed in the same manner as steps 1, 2, 4, 5, and 6 in Example 4, with the difference being step 3. In this embodiment, step 3 is as follows:

[0191] Step 3: Create a groove model in the finite element model to simulate the interaction between the segment sealing groove and the waterproof sealing gasket;

[0192] Specifically, they include:

[0193] (1) Setting the boundary conditions of the finite element model to establish the contact between the gasket and the groove, the contact between the upper and lower gaskets, and the self-contact of the gasket; applying all degree of freedom constraints on the outer surface of the lower groove, applying vertical displacement boundary conditions on the outer surface of the upper groove, and making the gasket reach the initial contact state;

[0194] (2) Applying vertical displacement to the upper groove simulates the installation process of the gasket, and applying horizontal displacement to simulate the staggered seam of the gasket;

[0195] In this step, pressure penetration technology is used to apply pressure penetration load to the contact surface between the groove and the sealing gasket and the contact surface between the upper and lower sealing gaskets;

[0196] (3) Set the material

[0197] Set the segment groove material, which can be set to rigid body, linear elastic or elastic-plastic model.

[0198] The elastic sealing gasket material is set, the Mooney-Rivlin model is adopted, and the normal and tangential contact characteristics of the contact surface in the finite element model are set.

[0199] (4) Setting structural optimization constraints

[0200] In this step, pressure penetration technology is used and structural optimization constraints are set. The reaction force on the outer surface of the groove on the segment is no greater than the assembly force of the shield machine, and no greater than the assembly force that causes damage to the shield segment groove; the hole size meets the manufacturing process requirements; the groove size meets the design range; and the fluid pressure penetration load P1 is greater than the waterproof pressure.

[0201] Step 4: Set the optimization objective function in the finite element model

[0202] In this step, the fourth objective function is set so that the groove area A is minimized.

[0203] Example 6

[0204] In this specific application example, a method for integrating shield segment grooves and waterproof elastic sealing gaskets is provided, wherein steps 1, 2, 4, 5, and 6 can be performed in the same manner as steps 1, 2, 4, 5, and 6 in Example 4, with the difference being step 3. In this embodiment, step 3 is as follows:

[0205] Step 3: Create a groove model in the finite element model to simulate the interaction between the segment sealing groove and the waterproof sealing gasket;

[0206] Specifically, they include:

[0207] (1) Setting the boundary conditions of the finite element model to establish the contact between the gasket and the groove, the contact between the upper and lower gaskets, and the self-contact of the gasket; applying all degree of freedom constraints on the outer surface of the lower groove, applying vertical displacement boundary conditions on the outer surface of the upper groove, and making the gasket reach the initial contact state;

[0208] (2) Applying vertical displacement to the upper groove simulates the installation process of the gasket, and applying horizontal displacement to simulate the staggered seam of the gasket;

[0209] Fluid-solid coupling technology is used to specify the initial fluid area and establish a coupling model including grooves, sealing gaskets and fluids. Pressure is applied to the fluid through displacement loading to simulate the fluid penetration process.

[0210] (3) Set the material

[0211] Set the segment groove material, which can be set to rigid body, linear elastic or elastic-plastic model.

[0212] Set the elastic sealing gasket material, adopt the Mooney-Rivlin model, set the normal and tangential contact characteristics of the contact surface in the finite element model, and set the fluid material parameters, such as the density, viscosity, and velocity of the fluid.

[0213] (4) Setting structural optimization constraints

[0214] In this step, fluid-solid coupling technology is used to set structural optimization constraints. The reaction force on the outer surface of the groove on the segment is no greater than the assembly force of the shield machine, and no greater than the assembly force that causes damage to the shield segment groove; the hole size meets the manufacturing process requirements; the groove size meets the design range; and the fluid pressure P2 is greater than the waterproof pressure.

[0215] Step 4: Set the optimization objective function in the finite element model

[0216] In this step, the fourth objective function is set so that the groove area A is minimized.

[0217] The aforementioned embodiments of the present invention enable simultaneous optimization of the shield segment grooves, the cross-sectional outer contours of the elastic gasket, and the holes, resulting in a gasket design that meets both design and production process requirements. This overcomes the existing technical issue of disconnection between structural and waterproofing design. By utilizing multi-body structural optimization technology and combining dimensional and topological optimization techniques, integrated, simultaneous optimization of the segment grooves, gasket outer contours, and holes is achieved, resolving the disconnect between joint waterproofing and structural design.

[0218] Furthermore, the above example utilizes explicit topology optimization technology, which enables efficient convergence of topology optimization, resolving the technical challenges of traditional implicit topology optimization, such as the difficulty in convergence and low solution efficiency. Furthermore, the use of explicit description technology for deformable holes allows for seamless integration of optimization results with CAD systems, resolving the technical challenge of utilizing topology optimization results. In this example, a deformable hole refers to a hole whose shape, size, and position change as the coordinates of its control points change.

[0219] The above embodiments are only some embodiments of the design method of the present invention. It should be noted that the technical features (including priority features) in the above embodiments of the present invention can be used in any combination without conflict, and are not limited to the records in the above embodiments.

[0220] In another embodiment of the present invention, an electronic terminal is also provided, including a memory, a processor, and a computer program stored in the memory and runnable on the processor. When the processor executes the program, it is used to execute the above-mentioned shield segment groove and waterproof elastic sealing gasket integrated design method, or to run the above-mentioned shield segment groove and waterproof elastic sealing gasket integrated design system.

[0221] In another embodiment of the present invention, a computer-readable storage medium is also provided, on which a computer program is stored. When the program is executed by a processor, it is used to execute the above-mentioned shield segment groove and waterproof elastic sealing gasket integrated design method, or to run the above-mentioned shield segment groove and waterproof elastic sealing gasket integrated design system.

[0222] It will be understood by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Thus, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0223] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowcharts and / or block diagrams, as well as combinations of processes and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowcharts and / or block diagrams. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0224] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0225] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0226] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0227] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A method for integrating shield segment grooves and waterproof elastic sealing gaskets, characterized in that: include: According to the initial design of the shield segment groove, the groove shape is parameterized to determine the parameters to be optimized for size optimization; Using parameterized curves to describe the outer contour shape of the elastic sealing gasket and the holes in the initial design, creating a topology optimization design region, and establishing a finite element model; Establishing a groove model in the finite element model, and simulating the interaction between the shield segment groove and the waterproof elastic sealing gasket in the finite element model; The waterproof capability of the waterproof sealing gasket is calculated using a finite element method, and the calculation results are iteratively optimized using an optimization algorithm to obtain an optimized result, wherein the optimized result includes: the numerical value of the parameter to be optimized, the outer contour of the sealing gasket, and the explicit expression of the hole parameterized curve; Based on the optimization results, the shield segment groove and waterproof elastic sealing gasket are designed to achieve synchronous optimization of the outer contours and holes of the shield segment groove and waterproof elastic sealing gasket; The interaction between the shield segment groove and the waterproof elastic sealing gasket is simulated in the finite element model, including: Setting boundary conditions of the finite element model to establish contact between the gasket and the groove, contact between the upper and lower gaskets, and self-contact of the gasket; based on the groove model, applying all degree-of-freedom constraints to the outer surface of the lower groove of the shield segment, applying vertical displacement boundary conditions to the outer surface of the upper groove of the shield segment, and ensuring that the waterproof elastic gasket reaches an initial contact state; Specifically, it also includes any of the following three situations: In the first case, vertical displacement is applied to the upper groove to simulate the installation process of the waterproof elastic sealing gasket, and horizontal displacement is applied to simulate the staggered joint of the waterproof elastic sealing gasket. The contact stress Pc between the contact surface between the segment groove and the sealing gasket and between the upper and lower sealing gasket contact surfaces is obtained. The second scenario: vertical displacement is applied to the upper groove to simulate the installation process of the waterproof elastic sealing gasket, and horizontal displacement is applied to simulate the staggered seam of the waterproof elastic sealing gasket. The waterproof capability of the sealing gasket is simulated in the finite element model. Specifically: Using pressure penetration technology, a fluid pressure penetration load P1 is applied to the contact surface between the groove and the gasket and the contact surface between the upper and lower gaskets; The third scenario: vertical displacement is applied to the upper groove to simulate the installation process of the waterproof elastic sealing gasket, and horizontal displacement is applied to simulate the staggered joints of the waterproof elastic sealing gasket. Fluid-solid coupling technology is used to specify the initial area of ​​the fluid, and a coupling model including the groove, sealing gasket and fluid is established. Pressure is applied to the fluid through displacement loading to simulate the fluid penetration process.

2. The method for integrated design of shield segment grooves and waterproof elastic sealing gaskets according to claim 1 is characterized in that: The initial design scheme is described using a parametric curve, which includes: Parametric curves are used to describe the shield segment groove shape, the outer contour of the waterproof sealing gasket section and the initial hole plan of the waterproof sealing gasket.

3. The method for integrated design of shield segment grooves and waterproof elastic sealing gaskets according to claim 1 is characterized in that: For the first scenario, the method further includes: setting structural optimization constraints in the finite element model; The optimization constraints specifically include the following conditions: The reaction force on the outer surface of the groove on the segment is not greater than the assembly force of the shield machine, and is not greater than the assembly force that causes damage to the shield segment groove; the hole size meets the manufacturing process requirements; the groove size meets the design range.

4. The method for integrated design of shield segment grooves and waterproof elastic sealing gaskets according to claim 1, characterized in that: For the first case, the contact stress Pc is obtained by setting a corresponding objective function, specifically: The first objective function is set, the contact stress Pc function is the maximum value, Pc is the minimum median contact stress of multiple contact surfaces, or is the minimum value of the average contact stress of multiple contact surfaces.

5. The method for integrated design of shield segment grooves and waterproof elastic sealing gaskets according to claim 1 is characterized in that: For the second scenario, the method further includes: setting structural optimization constraints in the finite element model; The optimization constraints specifically include the following conditions: The reaction force on the outer surface of the groove on the segment is not greater than the assembly force of the shield machine, and is not greater than the assembly force that causes damage to the shield segment groove; the hole size meets the manufacturing process requirements; the groove size meets the design range; the maximum contact stress between the groove and the sealing gasket contact surface and the upper and lower sealing gasket contact surfaces are both greater than 0.

6. The method for integrated design of shield segment grooves and waterproof elastic sealing gaskets according to claim 1, characterized in that: For the second case, the fluid pressure penetration load P1 is obtained by setting the corresponding objective function, specifically: The second objective function is set so that the fluid pressure penetration load P1 is the maximum value.

7. The method for integrated design of shield segment grooves and waterproof elastic sealing gaskets according to claim 1, characterized in that: For the third scenario, the method further includes: setting structural optimization constraints in the finite element model; The optimization constraints specifically include the following conditions: The reaction force on the outer surface of the groove on the segment shall not be greater than the assembly force of the shield machine, and shall not be greater than the assembly force that causes damage to the shield segment groove; the hole size shall meet the manufacturing process requirements; the groove size shall meet the design range; the joint seepage shall not exceed the upper limit of the engineering waterproofing standard.

8. The method for integrated design of shield segment grooves and waterproof elastic sealing gaskets according to claim 1, characterized in that: For the third scenario, pressure is applied to the fluid by displacement loading, wherein the fluid pressure P2 is obtained by setting the corresponding objective function, specifically: The third objective function is set so that the fluid pressure P2 is the maximum value.

9. The method for integrated design of shield segment grooves and waterproof elastic sealing gaskets according to claim 1, characterized in that: Setting structural optimization constraints in the finite element model also includes: Structural optimization constraints are set to ensure that the reaction force on the outer surface of the groove on the segment is no greater than the shield machine assembly force and no greater than the assembly force that causes damage to the shield segment groove; the hole size meets the manufacturing process requirements; and the groove size meets the design range. When using pressure penetration technology, structural optimization constraints are set. The reaction force on the outer surface of the groove on the segment is no greater than the shield machine assembly force, and no greater than the assembly force that causes damage to the shield segment groove. The hole size meets the manufacturing process requirements. The groove size is within the design range. When using fluid-solid coupling technology, structural optimization constraints are set. The reaction force on the outer surface of the groove on the segment is no greater than the assembly force of the shield machine, and no greater than the assembly force that causes damage to the shield segment groove; the hole size meets the manufacturing process requirements; and the groove size meets the design range.

10. The method for integrated design of shield segment grooves and waterproof elastic sealing gaskets according to claim 9, characterized in that: The groove area A is obtained through the corresponding objective function, specifically: The fourth objective function is set to minimize the groove area A.

11. A shield segment groove and waterproof elastic sealing gasket integrated design system, characterized in that: include: Module for determining parameters to be optimized: parameterizes the shield segment groove shape, determines the parameters to be optimized for size optimization, and uses parameterized curves to describe the outer contour shape and holes of the elastic sealing gasket; Finite element model building module: Based on the initial design of the shield segment groove, the elastic sealing gasket contour shape and the initial hole plan, the dimensional optimization parameters and topology optimization design area are determined, and the finite element model is established; Interaction module: establishing a groove model in the finite element model, and simulating the interaction between the shield segment groove and the waterproof elastic sealing gasket in the finite element model; Design optimization module: uses the finite element method to calculate the waterproof capacity of the waterproof sealing gasket, and uses the optimization algorithm to iteratively optimize the calculation results to obtain the optimized results. The optimized results include: the values ​​of the parameters to be optimized, the outer contour of the sealing gasket, and the explicit expression of the hole parameterized curve; Final design module: Based on the optimization results of the design optimization module, the shield segment groove and waterproof elastic sealing gasket are designed to achieve synchronous optimization of the outer contours and holes of the shield segment groove and waterproof elastic sealing gasket; The interaction module simulates the interaction between the shield segment groove and the waterproof elastic sealing gasket in the finite element model, including: Setting boundary conditions of the finite element model to establish contact between the gasket and the groove, contact between the upper and lower gaskets, and self-contact of the gasket; based on the groove model, applying all degree-of-freedom constraints to the outer surface of the lower groove of the shield segment, applying vertical displacement boundary conditions to the outer surface of the upper groove of the shield segment, and ensuring that the waterproof elastic gasket reaches an initial contact state; Specifically, it also includes any of the following three situations: In the first case, vertical displacement is applied to the upper groove to simulate the installation process of the waterproof elastic sealing gasket, and horizontal displacement is applied to simulate the staggered joint of the waterproof elastic sealing gasket. The contact stress Pc between the contact surface between the segment groove and the sealing gasket and between the upper and lower sealing gasket contact surfaces is obtained. The second scenario: vertical displacement is applied to the upper groove to simulate the installation process of the waterproof elastic sealing gasket, and horizontal displacement is applied to simulate the staggered seam of the waterproof elastic sealing gasket. The waterproof capability of the sealing gasket is simulated in the finite element model. Specifically: Using pressure penetration technology, a fluid pressure penetration load P1 is applied to the contact surface between the groove and the gasket and the contact surface between the upper and lower gaskets; The third scenario: vertical displacement is applied to the upper groove to simulate the installation process of the waterproof elastic sealing gasket, and horizontal displacement is applied to simulate the staggered joints of the waterproof elastic sealing gasket. Fluid-solid coupling technology is used to specify the initial area of ​​the fluid, and a coupling model including the groove, sealing gasket and fluid is established. Pressure is applied to the fluid through displacement loading to simulate the fluid penetration process.

12. An electronic terminal comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, it can be used to perform the method according to any one of claims 1 to 10, or run the system according to claim 11.

13. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, it can be used to perform the method according to any one of claims 1 to 10, or to run the system according to claim 11.

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