Shield segment groove and waterproof elastic sealing gasket integrated design method and system

Abstract

The invention discloses an integrated design method and system for a shield segment groove and a waterproof elastic sealing gasket, and the method comprises the steps: determining to-be-optimized parameters of size optimization according to an initial design scheme of the shield segment groove; describing an outer contour shape of the elastic sealing gasket and a hole of an initial design scheme, creating a topological optimization design area, and establishing a finite element model; in the finite element model, establishing a groove model, and simulating the interaction between the shield segment groove and the waterproof elastic sealing gasket; the waterproof capacity of the waterproof sealing gasket is calculated, the calculation result is iteratively optimized, and the optimized result is used for designing the shield segment groove and the waterproof elastic sealing gasket. By means of the method, synchronous optimization of shield segment grooves, the outer contour of the section of the elastic sealing gasket and holes can be achieved, the sealing gasket design scheme meeting the design requirement and the production process requirement is obtained, and the problems that an existing shield joint waterproof sealing gasket is low in design efficiency, and segment structural design and waterproof design are disjointed are solved to a certain degree.

Description

Technical Field

[0001] The 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 a waterproof elastic sealing pad integrated design method and system. Background Art

[0002] The joints of shield tunnel segments are relatively weak links in the waterproof system. At present, the joints of domestic shield tunnels are mainly waterproofed by compacting EPDM rubber joint materials. The water-stopping effect is ensured by improving the cross-sectional shape of the segment grooves and gaskets, and opening holes in the gaskets to control the contact surface stress.

[0003] At present, the design method of shield tunnel groove and joint elastic sealing gasket section is mainly based on experience, and the design of segment groove and sealing gasket is relatively independent, which has the disadvantages of low efficiency and poor economy, and it is often difficult to obtain the groove and sealing gasket section form that meets 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 match 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 design methods for sealing gaskets. 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 pads, which can simultaneously obtain groove and sealing pad 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 pads 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 of the initial design scheme, creating a topology optimization design area, 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 pad in the finite element model;

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

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

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

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

[0014] Setting the boundary conditions of the finite element model, establishing 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; applying all degree of freedom constraints on the outer surface of the groove under the shield segment, applying the vertical displacement boundary conditions on the outer surface of the groove on the upper shield segment, and making the waterproof elastic sealing gasket reach the 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 pad 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 pad in the finite element model further includes:

[0019] Fluid-solid coupling technology is used to specify the initial area of ​​the fluid, and a coupling model including grooves, sealing gaskets and fluids is established. 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; 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 between the groove and the sealing gasket contact surface and the upper and lower sealing gasket contact surfaces 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 waterproof pressure of the sealing gasket by contact stress, the structural optimization constraint conditions 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 the damage of the shield segment groove; the hole size meets the manufacturing process requirements; the groove size meets the design range; the function of the contact stress Pc is greater than the waterproof 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 pad, an objective function is set to obtain, including:

[0028] Setting 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 so that the groove area A is minimized.

[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: 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;

[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 pad in the finite element model;

[0036] Design optimization module: iteratively optimize the simulation results of the interaction module to obtain optimized results, the optimization results 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, there is provided an electronic terminal comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor is used to execute the above-mentioned method for integrated design of shield segment grooves and waterproof elastic sealing pads when executing the program, 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, there is provided a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, 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.

[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 pads provided by the present invention can avoid relying on empirical design of elastic sealing pads by adopting the structural optimization in the above steps, and solve the technical problems of low efficiency, poor economy and non-optimal design of conventional sealing pads.

[0042] The shield segment groove and waterproof elastic sealing gasket integrated design method and system provided by the present invention can simulate the actual working state of the sealing gasket by adopting multi-body optimization technology, and solve 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, so as to realize the integrated and synchronous optimization design of the segment grooves, the outer contour of the sealing pad and the holes, thereby solving the problem of disconnection between the joint waterproof design and the structural design.

[0044] The integrated design method and system of shield segment grooves and waterproof elastic sealing pads provided by the present invention can realize direct simulation of the coupling effects of joint closing, opening and seepage due to the use of pressure penetration simulation analysis, thus solving 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 the shield engineering waterproofing standard due to the structural optimization constraint conditions, which can realize the refined quantitative control of the sealing pad optimization and solve the problem that the waterproofing capacity of the 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 prior art. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0049] Figure 2 It 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 A schematic diagram of a topology optimization region of a 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 pad and the shield segment groove in one embodiment of the present invention;

[0054] Figure 7 It is a schematic diagram of the interaction between the elastic sealing pad and the shield segment groove in one embodiment of the present invention;

[0055] Figure 8 This is a schematic diagram of a segment groove pattern finally optimized in one embodiment of the present invention;

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

[0057] Fig.10 A schematic diagram of applying an external load using a pressure penetration technique in one embodiment of the present invention;

[0058] Fig.11 It is a schematic diagram of simulation analysis using fluid-solid coupling technology in one embodiment of the present invention. DETAILED DESCRIPTION

[0059] The present invention is described in detail below in conjunction with 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 of ordinary skill in the art, several variations and improvements may be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0060] It should be understood that the terms "first", "second", etc. of the following embodiments are used to distinguish different objects rather than to describe a specific order. The terms "include" and "comprise" 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, only for the convenience of description and simplified description, rather than indicating or suggesting 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 of the present invention.

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

[0062] In order to solve the above-mentioned problem / one of them, an embodiment of the present invention provides a method for integrating the design of shield segment groove and waterproof elastic sealing gasket.

[0063] Reference Figure 1 As shown, it is a flow chart of the integrated design method of shield segment groove and waterproof elastic sealing pad in this embodiment, and the method includes S100-S500:

[0064] S100, parameterizing the groove shape according to the initial design scheme of the shield segment groove, and determining the 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, wherein 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, which may be selected according to actual conditions.

[0067] S200, uses parameterized curves to describe the outer contour shape of the elastic sealing gasket and the holes in the initial design, creates a topology optimization design area, and establishes 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 condition, a T-slot condition or a cross seam condition.

[0070] In this step, a parameterized curve, such as a B-spline curve, may be used to describe the outer contour shape of the sealing gasket, and a parameterized curve may be used to describe the outer contour shape of the sealing gasket to carry out topological optimization.

[0071] In this step, a parameterized curve may be used to describe the shape of the gasket hole, such as a B-spline curve. The parameterized curve may be used to describe an initial scheme of holes of various mixed shapes, and topology optimization may be performed.

[0072] In this step, according to the outer contour shape of the shield segment groove and the elastic sealing pad, a topological optimization design area surrounded by the outer contour of the elastic sealing pad is created, meshing is performed, and a finite element mesh model is established. The segment groove is the part of the subsequent simulation size optimization, and the area surrounded by the outer contour of the elastic sealing pad is the part to be topologically optimized in the subsequent simulation. Existing finite element software can be used, such as ANSYS, ABAQUS, etc.

[0073] This step, together with step S100, is used for subsequent joint analysis of size optimization and topology optimization, thereby realizing the integrated 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 pad in the finite element model;

[0075] In this step, as required, the groove model can be simulated using a rigid body, linear elastic or elastoplastic model, 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, using a finite element method to calculate the waterproof capability of the waterproof sealing gasket, and using an optimization algorithm to iteratively optimize the calculation result to obtain an optimized result, the optimization result including: 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;

[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 outer contour of the gasket and the explicit expressions of the hole parameterized curve are obtained based on the simulation analysis in the finite element model. The simulation can be repeated multiple times, and the result that meets the set conditions is taken as the optimization result. Specifically, the simulation iteration calculation can be performed in the general optimization design platform, the explicit analysis module can be selected, and the geometric nonlinear analysis can be set.

[0079] S500, based on the optimized results, designs the shield segment groove and waterproof elastic sealing pad, and achieves synchronous optimization of the outer contour and holes of the shield segment groove and waterproof elastic sealing pad section.

[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 according to the optimization design results, the shapes of the segment groove, the outer contour of the sealing gasket and the hole can be determined according to the above size parameters and expressions, and the results can be directly imported into the CAD system to carry out the cross-sectional design of the segment groove and the elastic sealing gasket. The synchronous optimization of the outer contour and holes of the shield segment groove and the elastic sealing gasket cross-section can be achieved to obtain a sealing gasket design scheme that meets the design requirements and production process requirements.

[0081] In order to truly simulate the stress state of the sealing gasket and solve the problem of inconsistency between the single-body 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 the boundary conditions of the finite element model, establishing 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; applying all degree of freedom constraints on the outer surface of the groove under the shield segment, applying vertical displacement boundary conditions on the outer surface of the groove on the upper shield segment, and making the waterproof elastic sealing gasket reach 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, and 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, the gasket and the fluid, and apply pressure to the fluid through displacement loading to achieve simulation of 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 embodiment of the present invention adopts multi-body optimization technology. During the optimization process, the optimization objects include the upper and lower segment grooves and the upper and lower waterproof gaskets, and can achieve synchronous optimization. Therefore, the stress state of the gasket can be truly simulated, solving the problem of inconsistency between the single-body optimization model and the actual situation.

[0088] In order to simulate the actual working conditions more closely, in some embodiments, when executing S302, the interaction between the segment sealing groove and the waterproof elastic sealing pad is simulated in the finite element model, and the setting of the materials of each part may 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 elastoplastic 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 pad material can be set in the finite element model, for example, the Mooney-Rivlin model can be used to set the normal and tangential contact characteristics of the contact surface in the finite element model. Of course, if there are other situations, they can also be selected according to the actual situation.

[0091] In order to better adapt to fluid simulation conditions, in some embodiments, in addition to the above-mentioned segment 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 embodiments of the present invention take 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 gasket design.

[0093] On the basis of 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 under the shield segment, and the vertical displacement boundary conditions are applied to the outer surface of the groove on the upper shield segment. The following settings can be adopted:

[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; 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, and specifically, the initial opening amount and the misalignment amount are calculated according to 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 setting of the structural optimization constraint conditions in the above embodiment, the contact stress Pc, the fluid pressure penetration load P1 or the fluid pressure P2 are obtained by setting the corresponding objective function.

[0098] For example, in some embodiments, a first objective function may be set for the contact stress Pc, the contact stress Pc function being the maximum value, Pc being the minimum median contact stress of multiple contact surfaces, or being the minimum value of the average contact stress of multiple contact surfaces. According to previous research and engineering experience, the greater the contact stress, the stronger the waterproof ability of the sealing gasket.

[0099] For another example, for the fluid pressure penetration load P1, the second objective function can be set, the fluid pressure penetration load P1 is the maximum value, and at the same time, the constraint condition that the maximum contact stress of the contact surface between the groove and the sealing gasket and the contact surface between the upper and lower sealing gaskets is greater than 0 is satisfied. When the pressure penetration technology is used, as the fluid pressure increases, the initial contact surface will gradually separate, so that the contact surface force is equal to 0. When the contact surface is completely separated, the contact stress of the entire contact surface will become 0.

[0100] For another example, for the fluid pressure P2, a third objective function can be set, where the fluid pressure P2 is the maximum value, while satisfying the constraint that the joint seepage is not greater than the upper limit of the shield engineering waterproof standard. Existing numerical simulations and experiments to determine the waterproof pressure of the sealing pad are all linked to the contact stress. Through this design, this embodiment can achieve refined quantitative control of the optimization of the sealing pad according to the shield engineering waterproof standard, solving the problem that the waterproof capacity of the joint is difficult to quantitatively determine.

[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-mentioned embodiment of the present invention can provide the shape and size range of the shield segment sealing gasket groove according to the requirements of the target project, optimize the segment groove, the outer contour and the hole of the sealing gasket 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 can achieve the maximum waterproof ability and meet the design requirements. The above-mentioned embodiment of the present invention can achieve the synchronous optimization of the shield segment groove and the outer contour and hole of the elastic sealing gasket section through the organic coordination between 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 waterproof design in the prior art.

[0104] The above-mentioned preferred features of the present invention can be used in any combination without conflicting with each other. By combining finite element 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: 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;

[0107] Finite element model building module: Use parameterized curves to describe the outer contour shape of the elastic sealing gasket and the holes in the initial design, create a topology optimization design area, and build a finite element model;

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

[0109] Design optimization module: It iteratively optimizes the simulation results of the interaction module to obtain the optimized results, which 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 in a given design domain to optimize certain performance indicators according to load and structural optimization constraints. Most topology optimization studies are conducted under the implicit topology optimization framework, with a large number of design variables, and the obtained optimization design results usually require 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, so the convergence problem of finite element analysis in the optimization iteration process can be directly and effectively alleviated by deleting the degrees of freedom of the finite element nodes in the holes. 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 optimization design results can be seamlessly connected with the CAD / CAE system. In addition, the present invention further 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 waterproof design and structural design.

[0113] In order to better understand the solution of the present invention, a detailed schematic description is given below in combination with a plurality of preferred specific application examples, but it should be understood that the present invention is not limited to the following specific application embodiments.

[0114] Embodiment 1

[0115] In this specific example, the integrated design method of shield segment groove and waterproof elastic sealing pad 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 curve to describe the outer contour shape of the elastic sealing gasket and the holes in the initial design, create a topology optimization design area, and establish a finite element mesh model. The model can be a straight seam condition, a T-slot 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 topological optimization.

[0122]

[0123] Where P i =(x i ,y i ) T (i=0, ..., n) are the coordinates of the control points 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 ith 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 schematic diagram of the outer contour of the sealing gasket is shown in FIG. 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 and holes of the sealing gasket in the initial design can be given based on the design experience and literature of existing projects. 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 reality, the initial structure holes can be arbitrary, such as different shapes, different sizes, arbitrary arrangements, and unlimited number. 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, the gasket outer contour and the 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, the contact state is usually simulated by 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 on the outer surface of the lower groove. In order to make the gasket reach the initial contact state, you can gradually apply vertical displacement boundary conditions until the gasket contacts 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 misalignment of the gasket;

[0129] (3) Set materials

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

[0131] Set the elastic sealing gasket material, use 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; 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 pad and the shield segment groove. The shield segment groove is located at Figure 6 In the middle, the elastic sealing pad on the outside of the segment is located in the groove of the shield segment.

[0137] Reference Figure 7 The figure shows a schematic diagram of the finite element simulation model. Figure 7 The model can simulate the interaction between the elastic seal 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 expression of the B-spline curve of the hole are obtained. The shapes of the segment groove, gasket outer contour and hole can be determined based on the above size parameters and expressions, and the results can be directly imported into the CAD system to carry out the segment groove and elastic gasket cross-section design.

[0140] Reference Figure 8 , which is a schematic diagram of the segment groove scheme finally optimized in this embodiment 1. Fig. 9 , which is a schematic diagram of the sealing gasket solution finally optimized in the first embodiment. Fig. 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] Embodiment 2

[0143] In this specific application example, a shield segment groove and waterproof elastic sealing gasket integrated design method is provided, wherein steps 1, 2, 5 and 6 can be operated in the same manner as steps 1, 2, 5 and 6 in Example 1, except for steps 3 and 4. Steps 3 and 4 in this embodiment 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 misalignment of the gasket;

[0148] In the finite element model, the upper and lower gaskets and the gasket and the groove are set to be in surface contact. The pressure penetration technology is used. For details, please refer to Fig.10 The figure shows the operation of applying external load by pressure penetration technology. Fig.10 It can be seen that the pressure penetration can be applied from different angles / directions, that is, at least applied at the contact surface between the groove and the sealing gasket, and applied at the contact surface between the groove and the upper and lower sealing gaskets. Compared with the existing pressure penetration in only one direction or a single angle, the result obtained in this embodiment is closer to the needs of practical applications.

[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 materials

[0151] In this step, the segment groove material is set, which can be set to a rigid body, linear elastic or elastoplastic model. Further, 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 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.

[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 gradually increases, the contact surface gradually opens, and the contact area gradually decreases until a certain contact surface is completely detached and the sealing gasket fails to be waterproof. At this time, the fluid pressure penetration load P1 reaches its maximum value. The use of fluid pressure penetration technology can more realistically simulate the situation of the sealing gasket being subjected to lateral water pressure, and can reflect the process of the sealing gasket opening until the waterproof failure under the action of water pressure, which is more in line with the actual situation.

[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 monomer optimization model and the actual situation.

[0158] Embodiment 3

[0159] In this specific application example, a shield segment groove and waterproof elastic sealing gasket integrated design method is provided, wherein steps 1, 2, 5 and 6 can be operated in the same manner as steps 1, 2, 5 and 6 in Example 1, except for steps 3 and 4. Steps 3 and 4 in this embodiment 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 misalignment of the gasket;

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

[0165] Reference Fig.11 As shown in the figure, a schematic diagram of simulation analysis using fluid-solid coupling technology is shown. Through this simulation, the direct simulation of seepage coupling can be realized, the development process of joint seepage can be analyzed, and the waterproof limit state of the sealing gasket can be obtained.

[0166] (3) Set materials

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

[0168] The elastic sealing pad 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 surface between the groove and the gasket and between the gaskets gradually opens, and the seepage of the micropores between the contact surfaces gradually increases. Continue to increase P2, when the joint seepage reaches the upper limit allowed by the waterproof standard, it is considered that the waterproof capacity of the gasket has been achieved, and at this time, P2 reaches the maximum value.

[0175] In the above steps of this embodiment, the fluid-solid coupling technology is used to effectively optimize the design of the pipe segment and the sealing gasket through simulation analysis to improve their performance and reliability. At the same time, the structural optimization constraint condition introduces the shield engineering waterproof standard, which is linked to the design and has strong practicality. It can achieve refined quantitative control of the sealing gasket optimization and solve the problem that it is difficult to quantitatively determine the waterproof capacity of the joint.

[0176] Embodiment 4

[0177] In this specific application example, a shield segment groove and waterproof elastic sealing gasket integrated design method is provided, wherein steps 1, 2, 5 and 6 can be operated in the same manner as steps 1, 2, 5 and 6 in Example 1, except for steps 3 and 4. Steps 3 and 4 in this embodiment 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 misalignment of the gasket.

[0182] (3) Set the material

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

[0184] The elastic sealing pad 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 waterproof pressure of the sealing gasket is predicted by contact stress, and the structural optimization constraint conditions 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 the damage of the shield segment groove; the hole size meets the manufacturing process requirements; the groove size meets the design range; the function of the contact stress Pc is greater than the waterproof 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.

[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] Embodiment 5

[0190] In this specific application example, a shield segment groove and waterproof elastic sealing gasket integrated design method is provided, wherein steps 1, 2, 4, 5 and 6 can be operated in the same manner as steps 1, 2, 4, 5 and 6 in Example 4, except for step 3. Step 3 in this embodiment 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 misalignment 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 a rigid body, linear elastic or elastoplastic model.

[0198] The elastic sealing pad 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 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; 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] Embodiment 6

[0204] In this specific application example, a shield segment groove and waterproof elastic sealing gasket integrated design method is provided, wherein steps 1, 2, 4, 5 and 6 can be operated in the same manner as steps 1, 2, 4, 5 and 6 in Example 4, except for step 3. Step 3 in this embodiment 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 misalignment of the gasket;

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

[0210] (3) Set materials

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

[0212] 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. The fluid material parameters are set, 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 not greater than the assembly force of the shield machine, and is not greater than the assembly force that causes damage to the groove of the shield segment; 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] In the above-mentioned embodiments of the present invention, synchronous optimization of the shield segment groove and the outer contour and holes of the elastic sealing gasket section can be achieved, and a sealing gasket design scheme that meets the design requirements and production process requirements can be obtained, overcoming the technical problem of the disconnection between the existing structural design and the waterproof design. By adopting the multi-body structural optimization technology and the technology of combined size optimization and topology optimization, the integrated synchronous optimization design of the segment groove, the outer contour and the holes of the sealing gasket can be achieved, solving the problem of the disconnection between the joint waterproof design and the structural design.

[0218] In addition, the above example uses explicit topology optimization technology, which can achieve high-efficiency convergence of topology optimization and solve the technical problems of difficult convergence and low solution efficiency of traditional implicit topology optimization; because of the use of explicit description technology of deformable holes, the optimization results can be seamlessly connected with the CAD system, solving the technical problem of difficulty in using topology optimization results. In this example, a deformable hole means that when the coordinates of the control point of the hole change, the shape, size and position of the hole will change, so it is a deformable hole.

[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 conflicting with each other, and are not limited to 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 executable on the processor, wherein the processor is used to execute the above-mentioned shield segment groove and waterproof elastic sealing pad integrated design method when executing the program, or to run the above-mentioned shield segment groove and waterproof elastic sealing pad 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] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, 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 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 flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, 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 flowchart and / or block diagram. 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 capable of directing a computer or other programmable data processing device to operate 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 A 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 operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process in the computer or other programmable device. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified 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 can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A method for integrated design of shield segment groove and waterproof elastic sealing pad, 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 of the initial design scheme, creating a topology optimization design area, 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 pad in the finite element model; The waterproof ability of the waterproof gasket is calculated by using the finite element method, and the calculation result is iteratively optimized by using the optimization algorithm to obtain the optimized result, wherein the optimization result includes: the numerical value of the parameter to be optimized, the outer contour of the gasket and the explicit expression of the hole parameterized curve; According to the optimized results, the shield segment groove and waterproof elastic sealing pad are designed to achieve synchronous optimization of the outer contour and holes of the shield segment groove and waterproof elastic sealing pad section.

2. The integrated design method of shield segment groove and waterproof elastic sealing pad 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 integrated design method of shield segment groove and waterproof elastic sealing pad according to claim 1 is characterized in that: The interaction between the shield segment groove and the waterproof elastic sealing gasket is simulated in the finite element model, including: Setting the boundary conditions of the finite element model, establishing 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; based on the groove model, applying all degree of freedom constraints on the outer surface of the groove under the shield segment, applying the vertical displacement boundary conditions on the outer surface of the groove on the upper shield segment, and making the waterproof elastic sealing gasket reach the initial contact state; Specifically, it also includes any of the following three situations: 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 seam of the waterproof elastic sealing gasket, and 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 case: applying vertical displacement to the upper groove to simulate the installation process of the waterproof elastic sealing gasket, applying horizontal displacement to simulate the staggered seam of the waterproof elastic sealing gasket, and simulating the waterproof ability of the sealing gasket 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 situation: 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.

4. The integrated design method of shield segment groove and waterproof elastic sealing pad according to claim 3 is characterized in that: For the first scenario, it also 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.

5. The integrated design method of shield segment groove and waterproof elastic sealing pad according to claim 3 is 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.

6. The integrated design method of shield segment groove and waterproof elastic sealing pad according to claim 3 is characterized in that: For the second situation, it also includes: setting structural optimization constraint conditions 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 groove of the shield segment; 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.

7. The integrated design method of shield segment groove and waterproof elastic sealing pad according to claim 3 is characterized in that: For the second case, the fluid pressure penetration load P1 is obtained by setting a corresponding objective function, specifically: The second objective function is set so that the fluid pressure penetration load P1 is the maximum value.

8. The method for integrated design of shield segment groove and waterproof elastic sealing pad according to claim 3 is characterized in that: For the third situation, it also includes: setting structural optimization constraint conditions 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 joint seepage is not greater than the upper limit of the engineering waterproofing standard.

9. The integrated design method of shield segment groove and waterproof elastic sealing pad according to claim 3 is characterized in that: For the third case, pressure is applied to the fluid by displacement loading, wherein the fluid pressure P2 is obtained by setting a corresponding objective function, specifically: The third objective function is set so that the fluid pressure P2 is the maximum value.

10. The shield segment groove and waterproof elastic sealing gasket integrated design method according to claim 3, characterized in that: Setting structural optimization constraints in the finite element model also includes: 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 the damage of the shield segment groove; the hole size meets the manufacturing process requirements; the groove size meets the design range; When using pressure penetration technology, set structural optimization constraints, the reaction force on the outer surface of the groove on the segment is not greater than the shield machine assembly force, and is not greater than the assembly force that causes the shield segment groove to be damaged; the hole size meets the manufacturing process requirements; the groove size meets 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 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.

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

12. A shield segment groove and waterproof elastic sealing gasket integrated design system, characterized in that: include: Module for determining parameters to be optimized: parameterize the shield segment groove shape, determine the parameters to be optimized for size optimization, and use parameterized curves to describe the outer contour shape and holes of the elastic sealing pad; Finite element model building module: According to the initial design scheme of the shield segment groove, the contour shape of the elastic sealing pad and the initial scheme of the hole, the size optimization parameters and topology optimization design area are determined, and the finite element model is established; Interaction module: simulating the interaction between the shield segment groove and the waterproof elastic sealing pad in the finite element model; Design optimization module: Calculate the waterproof capability of the waterproof gasket using the finite element method, and iteratively optimize the calculation results using the optimization algorithm to obtain the optimized results, which include: the numerical values ​​of the parameters to be optimized, the outer contour of the 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 pad are designed to achieve synchronous optimization of the outer contour and holes of the shield segment groove and waterproof elastic sealing pad section.

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

14. 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 execute the method described in any one of claims 1 to 11, or to run the system described in claim 12.

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