Test system applying proximity engineering-stratum-underground structure system and control method

Abstract

The invention relates to the technical field of engineering control, and provides a test system and a control method applying a proximity engineering-stratum-underground structure system, and the system comprises a numerical subsystem which is used for determining predicted displacement data according to a load increment; the agent subsystem is used for performing numerical analysis by taking the predicted displacement data as a boundary displacement load to obtain predicted force; the physical subsystem is used for acquiring feedback displacement data corresponding to the predicted force; the agent subsystem is also used for performing parameter inversion based on the feedback displacement data and the predictive force to obtain high-fidelity physical parameters and determine the feedback force; and the numerical subsystem is also used for determining unbalanced force data according to the predicted force and the feedback force, so that the numerical subsystem is changed into an unbalanced state to drive multiple rounds of iteration of the hybrid test until the unbalanced force data is lower than the tolerance. The system provided by the invention can ensure that the physical subsystem directly participates in each iterative calculation process of the numerical subsystem, and improves the accuracy of a mixing test.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of engineering control technology, in particular to a test system and control method for near engineering-stratum-underground structure system. BACKGROUND

[0002] The near engineering caused by the densification of urban underground space is increasing, which will cause strong construction disturbance to the surrounding stratum, change the ground stress field and displacement field, and thus cause problems such as concrete cracking, joint opening and member yielding of underground structures such as subways, so it is necessary to study the nonlinear mechanical response and structural damage evolution law of underground structures under the construction load of near engineering.

[0003] In related technologies, the test method combining numerical simulation and model test (hybrid test) is a research means that can simulate the interaction of near engineering-stratum-underground structure at system scale and the damage evolution process of underground structure at structure scale. The hybrid test method originated from the difficulty in dynamic test of large-scale engineering structures on the ground. In the seismic hybrid test, the components with strong nonlinearity in the engineering structure are selected as the physical subsystem, and the remaining part which is easy to be numerically simulated is selected as the numerical subsystem, and the two subsystems realize data interaction through the hybrid test platform to simulate the response of the whole structure under the action of earthquake. Therefore, for the near engineering-stratum-underground structure system, the underground structure with complex soil-structure interaction and its surrounding soil can be taken as the physical subsystem, and the remaining near engineering and large-scale soil can be taken as the numerical subsystem, and the two subsystems realize data interaction through the hybrid test platform to simulate the response of the target underground structure under the construction load of near engineering. In the hybrid test of the upper structure, the real test subsystem is in an elastic state before it is damaged, and can directly participate in the iterative calculation process of the numerical subsystem, and the repeated loading and unloading in the early stage of interaction does not affect the accuracy of the test. However, when the hybrid test method is applied to the near engineering-stratum-underground structure system, the soil is always strongly nonlinear during the loading process, and its stiffness is strongly related to the loading path, which leads to the fact that the physical subsystem cannot directly participate in each iterative calculation process of the numerical subsystem. With the increase of the number of iterations, the repeated loading and unloading interaction process will cause the fluctuation of the stiffness of the soil, which reduces the accuracy of the hybrid test, and even may cause the numerical simulation result to deviate greatly from the convergence target, and thus cause the test loading target value to exceed the safety threshold, resulting in safety accidents. SUMMARY

[0004] The present application provides a test system and control method for near engineering-stratum-underground structure system, which solves the defect that the accuracy of the hybrid test is reduced with the increase of the number of iterations when the hybrid test method is applied to the near engineering-stratum-underground structure system in the prior art; the system improves the accuracy of the hybrid test.

[0005] The application provides a test system for a near-proximity engineering-stratum-underground structure system, comprising: a numerical subsystem configured to determine predicted displacement data according to a load increment obtained through a hybrid test procedure based on the near-proximity engineering, stratum and underground structure system; an agent subsystem configured to perform numerical analysis with the predicted displacement data as a boundary displacement load when the numerical subsystem converges iteratively, to obtain predicted force; a physical subsystem configured to load the predicted force and measure feedback displacement data corresponding to the predicted force; the agent subsystem is further configured to perform parameter inversion on the feedback displacement data and the predicted force, to obtain high-fidelity physical parameters, and determine feedback force according to the high-fidelity physical parameters; wherein the high-fidelity physical parameters include constitutive parameters of the soil and material parameters of the underground structure; the numerical subsystem is further configured to determine unbalanced force data according to the predicted force and the feedback force, and drive the hybrid test procedure for multiple rounds of iteration according to the unbalanced force data, to control the unbalanced force data corresponding to the hybrid test procedure after iteration to be lower than a tolerance.

[0006] The application provides a test system for a near-proximity engineering-stratum-underground structure system, and the numerical subsystem comprises: a numerical model of the near-proximity engineering and stratum, configured to simulate construction disturbance data of the near-proximity engineering and stratum response data; a test unit connected with a LabVIEW communication plug-in, the test unit being configured to determine predicted displacement data according to the construction disturbance data and the stratum response data; wherein the LabVIEW communication plug-in should be able to realize communication of at least 100 degrees of freedom, and the upper limit of the number of degrees of freedom depends on the available memory of the computer.

[0007] The application provides a test system for a near-proximity engineering-stratum-underground structure system, and the physical subsystem comprises: a test device, configured to receive the predicted force and convert it into target predicted force, and measure feedback displacement data corresponding to the target predicted force; a stratum-structure physical model comprising a similar scaled model of a target underground structure and surrounding soil, the stratum-structure physical model being configured to bear the target predicted force of the test device.

[0008] The application provides a test system for a near-proximity engineering-stratum-underground structure system, and the agent subsystem comprises: a stratum-structure numerical model containing high-fidelity physical parameters of the physical subsystem; a model parameter inversion module.

[0009] The application provides a test system for a near engineering-stratum-underground structure system, wherein the physical subsystem comprises a vertical loading plate corresponding boundary, a horizontal loading plate corresponding boundary and a bottom plate corresponding boundary, the loading plate corresponding boundary and the bottom plate corresponding boundary are each provided with a plurality of nodes, and the vertical freedom degrees of the nodes of the vertical loading plate and the bottom plate corresponding boundary are partitioned and bound, and the vertical freedom degrees of the nodes of each horizontal loading plate corresponding boundary are partitioned and bound.

[0010] The application provides a test system for a near engineering-stratum-underground structure system, and the test device is further used for applying a target predicted force to the stratum-structure physical model; wherein the target predicted force is determined based on a difference between the predicted force and a lateral pressure corresponding to the gravity of the soil in the agent subsystem.

[0011] The application further provides a control method of the test system for the near engineering-stratum-underground structure system, comprising: Based on the numerical subsystem, in the case that the load increment is obtained through the hybrid test process based on the near engineering-stratum-underground structure system, predicted displacement data is determined according to the load increment; Based on the agent subsystem, when the numerical subsystem iteratively converges, numerical analysis is performed with the predicted displacement data as a boundary displacement load, and a predicted force is obtained; Based on the physical subsystem, the predicted force is loaded and feedback displacement data corresponding to the predicted force is measured; Based on the agent subsystem, parameter inversion is performed on the feedback displacement data and the predicted force, high-fidelity physical parameters are obtained, and a feedback force is determined according to the high-fidelity physical parameters; wherein the high-fidelity physical parameters comprise constitutive parameters of the soil and material parameters of the underground structure; Based on the numerical subsystem, unbalanced force data is determined according to the predicted force and the feedback force, and the hybrid test process is driven to perform multiple rounds of iterations according to the unbalanced force data, so that the unbalanced force data corresponding to the iterated hybrid test process is lower than a tolerance.

[0012] The application provides a control method of the test system for the near engineering-stratum-underground structure system, and a target predicted force is determined according to a difference between the predicted force and a lateral pressure corresponding to the gravity of the soil in the agent subsystem; The feedback displacement data is determined according to the target predicted force.

[0013] The application further provides an electronic device comprising a memory, a processor and a computer program stored in the memory and capable of running on the processor, and the processor implements the control method of the test system for the near engineering-stratum-underground structure system when executing the computer program.

[0014] The application further provides a non-transitory computer-readable storage medium, which stores a computer program, and the computer program is executed by a processor to implement the control method of the test system for the near-field engineering-stratum-underground structure system.

[0015] The application further provides a computer program product, which comprises a computer program, and the computer program is executed by a processor to implement the control method of the test system for the near-field engineering-stratum-underground structure system.

[0016] The test system for the near-field engineering-stratum-underground structure system and the control method thereof have the advantages that the numerical subsystem is arranged to determine the predicted displacement data according to the load increment, the agent subsystem is arranged to perform numerical analysis on the predicted displacement data as the boundary displacement load to obtain the predicted force, the physical subsystem is arranged to obtain the feedback displacement data corresponding to the predicted force, the agent subsystem is arranged to perform parameter inversion on the feedback displacement data and the predicted force to obtain the high-fidelity physical parameter, the feedback force is determined according to the high-fidelity physical parameter, and the numerical subsystem is arranged to determine the unbalanced force data according to the predicted force and the feedback force to drive the hybrid test process to perform multiple iterations, in the process, the agent subsystem obtains the high-fidelity physical parameter of the physical subsystem through the parameter inversion method, so that the boundary force data fed back to the numerical subsystem contains the real stiffness information of the physical subsystem, and the high-fidelity substitute model of the physical subsystem directly participates in each iterative calculation process of the numerical subsystem, thereby improving the accuracy of the hybrid test. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the present application or the prior art, the following will briefly introduce the drawings needed in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0018] Figure 1 is one of the structural schematic diagrams of the test system for the near-field engineering-stratum-underground structure system provided by the application.

[0019] Figure 2 is an interface schematic diagram of the gravity analysis stage and the excavation analysis stage of the tunnel upper foundation pit engineering provided by the application.

[0020] Figure 3 is another structural schematic diagram of the test system for the near-field engineering-stratum-underground structure system provided by the application.

[0021] Figure 4is a structural schematic diagram of a physical subsystem provided by the present application and a display diagram of output results of two types of finite element models.

[0022] Figure 5 is a schematic diagram of a horizontal soil pressure reduction process provided by the present application.

[0023] Figure 6 is one of schematic diagrams of a control method of an experimental system applying a near-field engineering-stratum-underground structure system provided by the present application.

[0024] Figure 7 is another schematic diagram of a control method of an experimental system applying a near-field engineering-stratum-underground structure system provided by the present application.

[0025] Figure 8 is a structural schematic diagram of an electronic device provided by the present application.

[0026] Reference signs: 100: numerical subsystem; 110: numerical model of near-field engineering and stratum; 120: experimental unit; 200: physical subsystem; 210: stratum-structure physical model; 220: experimental device; 300: agent subsystem; 310: stratum-structure numerical model; 320: model parameter inversion module. DETAILED DESCRIPTION

[0027] To make the objectives, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be described clearly and completely below with reference to the drawings in the present application. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0028] The experimental system and control method of the present application applying a near-field engineering-stratum-underground structure system will be described below with reference to the drawings. Figures 1-7

[0029] Figure 1 is one of structural schematic diagrams of an experimental system applying a near-field engineering-stratum-underground structure system provided by the present application, as shown in the figure, the experimental system comprises: Figure 1 a numerical subsystem 100, a physical subsystem 200 and an agent subsystem 300. The present application provides an experimental system applying a near-field engineering-stratum-underground structure system, comprising: a numerical subsystem 100, a physical subsystem 200 and an agent subsystem 300.

[0030] ​The numerical subsystem 100 is configured to determine the predicted displacement data according to the load increment in the case of obtaining the load increment through the hybrid test process based on the near-field engineering, stratum and underground structure system.

[0031] Figure 2 is a schematic diagram of the interface between the gravity analysis stage and the excavation analysis stage of the tunnel over foundation pit engineering provided by the present application, in which Figure 2 In the embodiment shown, a tunnel over foundation pit engineering is taken as an example to illustrate the overall architecture of the test system of the near-field engineering-stratum-underground structure system, the hybrid test process of the near-field engineering-stratum-underground structure system driven by the test system of the near-field engineering-stratum-underground structure system and the way of simplifying the boundary degrees of freedom and reducing the horizontal soil pressure; as shown in Figure 2 The tunnel over foundation pit engineering taken as an example includes (a) gravity analysis and (b) excavation analysis two stages; wherein, the contact element is used to simulate the contact relationship between the diaphragm wall and the soil body; all node degrees of freedom of the bracing structure and the diaphragm wall at the connection are bound; all node degrees of freedom of the tunnel and the soil body on the contact boundary are bound; in the figure xoy The coordinate system is constructed with the center of the tunnel as the origin, the horizontal direction as the x axis and the vertical direction as the y axis.

[0032] In this embodiment, the complete numerical model of the near-field engineering-stratum-underground structure system in the example engineering can be established through the OpenSees finite element software; wherein, the numerical subsystem 100 and the agent subsystem 300 are constructed based on the complete numerical model.

[0033] In this embodiment, the numerical subsystem 100 is used to simulate the near-field engineering construction disturbance and the stratum response, and the difference between this simulation method and the complete finite element model is that the target underground structure and its surrounding soil body elements are removed in the numerical subsystem 100, and the Generic test element 120 defined by OpenFresco is added instead; moreover, the removed target underground structure and its surrounding soil body elements are used as the parameter-updatable stratum-structure numerical model in the agent subsystem 300.

[0034] In this embodiment, the hybrid test process is initialized, and the load increment in the numerical subsystem 100 is activated, which is used as the unbalanced force to drive the first round of virtual iteration process of the hybrid test process; it is judged whether the unbalanced force of the current analysis step is less than or equal to the allowable error, if greater, the iteration loop of the n (n is a positive integer greater than 1) analysis step is continued, and in the interactive calculation of the virtual iteration step, the numerical subsystem 100 calculates the predicted displacement according to the unbalanced force of the virtual iteration process and sends it to the agent subsystem 300 for subsequent processing.

[0035] The proxy subsystem 300 is used to perform numerical analysis with the predicted displacement data as the boundary displacement load during the iterative convergence of the numerical subsystem, and obtain the predicted force.

[0036] In this embodiment, the proxy subsystem 300 is used to replace the physical subsystem 200 to directly participate in the numerical iterative calculation of the numerical subsystem until the numerical subsystem 100 converges to the equilibrium state. Then, the predicted displacement data is used as the boundary displacement load, and the corresponding predicted force is obtained through numerical analysis.

[0037] In this embodiment, the agent subsystem 300 interacts with the numerical subsystem 100 via a LabVIEW communication plugin.

[0038] In this embodiment, the proxy subsystem 300 includes: a stratigraphic-structural numerical model 310 containing high-fidelity physical parameters of the physical subsystem and a model parameter inversion module 320.

[0039] The model parameter inversion module 320 is used to perform parameter inversion on the feedback displacement data and predicted force to obtain the corresponding high-fidelity physical parameters; the formation-structure numerical model 310 calculates the corresponding feedback force based on the high-fidelity physical parameters.

[0040] Figure 3 This is the second structural schematic diagram of the experimental system for applying the proximity engineering-stratum-subsurface structure system provided by the present invention. Figure 3 In the illustrated embodiment, the workflow of the proxy subsystem includes two parts: prediction and feedback. In the prediction process, the proxy subsystem receives predicted displacement data sent by the experimental unit of the numerical subsystem. , and then Numerical analysis was performed using the boundary displacement load to obtain the predicted force. and will The data is sent to the physical subsystem, which realizes the process of converting boundary displacement into boundary force; d represents the feedback displacement data.

[0041] The physical subsystem 200 is used to apply the predicted force and measure the feedback displacement data corresponding to the predicted force.

[0042] In this embodiment, when the predicted force data is applied to the boundary of the physical subsystem 200, the sensing device installed on the physical subsystem 200 can read the feedback displacement data corresponding to the current predicted force data.

[0043] In this embodiment, the physical subsystem 200 includes a formation-structure physical model 210 and an experimental apparatus 220.

[0044] The test apparatus 220 is used to receive the predicted force and convert it into the target predicted force, and to measure the feedback displacement data corresponding to the target predicted force.

[0045] The stratum-structure physical model 210 includes a similar scale model of the target underground structure and surrounding soil, and is used to bear the target predicted force of the test device.

[0046] The agent subsystem 300 is also used to perform parameter inversion on the feedback displacement data and the predicted force to obtain high-fidelity physical parameters, and determine the feedback force according to the high-fidelity physical parameters; wherein the high-fidelity physical parameters include constitutive parameters of the soil and material parameters of the underground structure.

[0047] In this embodiment, the agent subsystem 300 includes a stratum-structure numerical model 310 containing high-fidelity physical parameters of the physical subsystem 200 and a model parameter inversion module 320.

[0048] In Figure 3 the feedback process, the model parameter inversion module of the agent subsystem receives the feedback displacement data and the predicted force sent by the physical subsystem, and performs reanalysis to obtain high-fidelity physical parameters (including constitutive parameters of the soil, material parameters of the underground structure, etc.), and finally, the agent subsystem recalculates the feedback force and sends it to the numerical subsystem, thereby realizing the process of feeding back the real stiffness information of the physical subsystem to the numerical subsystem. θ θ

[0049] The numerical subsystem 100 is also used to determine unbalance force data according to the predicted force and the feedback force, and drive the hybrid test process to perform multiple rounds of iterations according to the unbalance force data, so as to control the unbalance force data corresponding to the hybrid test process after iteration to be lower than the tolerance.

[0050] In this embodiment, the numerical subsystem 100 compares and analyzes the feedback force with the model predicted force to obtain unbalance force data, and if the unbalance force data is higher than the tolerance, it indicates that the difference between the two is large, and according to the unbalance force data, a new round of virtual iteration and physical iteration is continued to be driven until the unbalance force data is less than the tolerance.

[0051] ​​​​​In the embodiment, in the virtual iteration process of the mixed test procedure, the numerical subsystem 100 and the agent subsystem 300 obtain the predicted force on the boundary through interactive calculation, as the input of the physical iteration, avoiding the repeated loading and unloading problem caused by the direct interaction iteration between the physical subsystem 200 and the numerical subsystem 100; in the physical iteration procedure, the physical subsystem 200 implements loading based on the predicted force, avoiding the problem of unloading of the loading plate and the soil body, and inputs the physical parameters containing the real stiffness information to the numerical subsystem 100 through the agent subsystem 300, thereby introducing new unbalanced force in the numerical subsystem 100, driving a new round of virtual iteration and physical iteration until the unbalanced force is less than the tolerance.

[0052] In some embodiments, for the following problems occurring in the mixed test procedure: the soil body has the characteristics of being compressed but not being stretched, and the force control mode needs to be used to prevent the unloading of the loading plate and the soil body, but in the mixed test, the output of the finite element is displacement instruction, which needs to be converted into force instruction before loading, the embodiment sets the agent subsystem 300 to convert the communication data on the common boundary of the numerical subsystem 100, the agent subsystem 300 and the physical subsystem 200 through the finite element model, realizing the conversion of displacement and force boundary conditions.

[0053] The test system for applying the near engineering-stratum-underground structure system provided by the embodiment of the application determines the predicted displacement data according to the load increment through the numerical subsystem 100, performs numerical analysis on the predicted displacement data as the boundary displacement load through the agent subsystem 300, obtains the predicted force, acquires the feedback displacement data corresponding to the predicted force through the physical subsystem 200, performs parameter inversion on the feedback displacement data and the predicted force through the agent subsystem 300, obtains the high-fidelity physical parameter, determines the feedback force according to the high-fidelity physical parameter, and finally determines the unbalanced force data according to the predicted force and the feedback force through the numerical subsystem 100, to drive the mixed test procedure to perform multiple iterations. In the process, the agent subsystem 300 obtains the high-fidelity physical parameter of the physical subsystem 200 through the parameter inversion method, so that the boundary force data fed back to the numerical subsystem 100 contains the real stiffness information of the physical subsystem 200, thereby directly participating in the iterative calculation process of the numerical subsystem 100 as the high-fidelity substitute model of the physical subsystem 200, and the accuracy of the mixed test is improved.

[0054] In some embodiments, the numerical subsystem 100 includes: a numerical model 110 of the near engineering and stratum and a test unit 120.

[0055] The numerical model 110 of the approaching engineering and stratum is used for simulating construction disturbance data and stratum response data of the approaching engineering; the test unit 120 is connected with a LabVIEW communication plug-in, and the test unit 120 is used for determining predicted displacement data according to the construction disturbance data and the stratum response data; wherein the LabVIEW communication plug-in is used for realizing communication of at least 100 degrees of freedom, and the upper limit of the number of degrees of freedom depends on the available memory of the computer.

[0056] In this embodiment, the numerical model 110 of the approaching engineering and stratum is constructed according to geological survey data, construction data, design data of existing structures and the like.

[0057] In this embodiment, the test unit 120 is defined and set by OpenFresco, the test unit 120 can participate in numerical analysis of the numerical subsystem 100 instead of the physical subsystem 200, and also serves as an interface for TCP communication and interaction between the numerical subsystem 100 and the physical subsystem 200, for sending predicted displacement and receiving feedback force.

[0058] In this embodiment, the test unit 120 can also establish a communication connection with ABAQUS numerical software, through deep integration of OpenFresco and ABAQUS, cross-platform data flow synchronization and multi-physical field coupling analysis are supported, and the data interaction efficiency of the numerical subsystem 100 is improved.

[0059] In view of the problem of inconsistent displacement degrees of freedom between the subsystems in the test system applying the approaching engineering-stratum-underground structure system, the boundary degrees of freedom of the numerical subsystem 100 and the agent subsystem 300 are simplified in this embodiment; the specific implementation manner is as follows: In some embodiments, the physical subsystem 200 includes a vertical loading plate corresponding boundary, a horizontal loading plate corresponding boundary and a bottom plate corresponding boundary, the loading plate corresponding boundary and the bottom plate corresponding boundary are each provided with a plurality of nodes, the vertical degrees of freedom of the nodes of the vertical loading plate and the bottom plate corresponding boundary are partitioned and bound, and the vertical degrees of freedom of the nodes of each horizontal loading plate corresponding boundary are partitioned and bound.

[0060] In this embodiment, according to the number of horizontal loading plates of the physical subsystem 200, the horizontal degrees of freedom of the nodes on the left and right boundaries of the numerical subsystem 100 can be partitioned and bound, and according to the number of vertical loading plates of the physical subsystem 200, the horizontal degrees of freedom of the nodes on the top and bottom boundaries of the numerical subsystem 100 can be partitioned and bound.

[0061] Figure 4 is a structural schematic diagram of the physical subsystem and a display diagram of output results of two types of finite element models provided by the present application, in which Figure 4In the shown embodiment, the physical subsystem in 4(a) includes loading plates on the left and right sides, a loading plate on the top, and no loading plate on the bottom; in order to evaluate the influence of the bound node degrees of freedom on the structural mechanical response, the physical subsystem binds the x-direction degrees of freedom (12m) and the y-direction degrees of freedom (12m); 4(b) compares the calculation results between the finite element model without binding the node degrees of freedom and the finite element model with binding the node degrees of freedom in the gravity analysis stage, and it can be found that the calculation results before and after binding are almost the same; in the gravity analysis stage, "-" represents the unbound node degrees of freedom, and "°" represents the bound node degrees of freedom; from 4(b), the numerical distribution of the tunnel bending moment in the x and y directions can be known.

[0062] The test system for applying the near engineering-stratum-underground structure system provided in the embodiments of the present application can solve the problem of inconsistent displacement degrees of freedom between the subsystems by setting the loading plate and the corresponding node degrees of freedom to distinguish the degrees of freedom on the common boundary of the bound numerical subsystem 100 and the agent subsystem 300, and meanwhile, the accurate simulation of the mechanical response of the underground structure is not affected.

[0063] In order to solve the problem of inconsistent force system between the agent subsystem 300 and the physical subsystem 200 in the test system for applying the near engineering-stratum-underground structure system, the horizontal earth pressure of the agent subsystem 300 is reduced and then applied to the physical subsystem 200 in the embodiments; the specific implementation manner is as follows: In some embodiments, the test device 220 is further used to apply the target predicted force to the stratum-structure physical model 210; wherein the target predicted force is determined based on the difference between the predicted force and the lateral pressure corresponding to the gravity of the soil in the agent subsystem.

[0064] Figure 5 The figure is a horizontal earth pressure reduction process provided in the present application, and in Figure 5 In the shown embodiment, 5(a) shows the boundary earth pressure extracted from the complete model and the displacement corresponding to different pressures, wherein, P 1, P 2 is the vertical earth pressure, P 3 is the horizontal earth pressure; as shown in 5(c) and 5(b), the predicted horizontal earth pressure is reduced through the physical subsystem and then applied to the stratum-structure physical model, that is, the total horizontal earth pressure ( P 3) needs to deduct the horizontal earth pressure ( P G ) caused by the gravity of the soil; as shown in 5(d), due to the existence of the tunnel, P G is not equal to K 0 γh ( K 0 is the static earth pressure coefficient, γ is the key point of the soil,h The predicted force can be obtained by carrying out gravity analysis under the constraint condition of the finite element model in the agent subsystem; as shown in Fig. 5 (e), it can be seen that the bending moment of the tunnel after reduction of the horizontal earth pressure is consistent with the calculation result of the complete model, indicating that the reduced boundary force is the equivalent force of the predicted boundary force. K

[0065] The application of the test system for the near engineering-stratum-underground structure system provided in the embodiment of the application further improves the accuracy of the mixed test result by applying the difference between the predicted force and the gravity of the soil to the stratum-structure physical model through the test device.

[0066] The control method of the test system for the near engineering-stratum-underground structure system provided in the application will be described below, and the control method of the test system for the near engineering-stratum-underground structure system described below can be correspondingly referred to the test system for the near engineering-stratum-underground structure system described above.

[0067] Figure 6 Fig. 1 is one of the flowcharts of the control method of the test system for the near engineering-stratum-underground structure system provided in the application, as shown in the figure, the control method of the test system for the near engineering-stratum-underground structure system comprises the following steps: Figure 6 Step 610, based on the numerical subsystem, in the case of obtaining the load increment through the mixed test process based on the near engineering, stratum and underground structure system, determining the predicted displacement data according to the load increment.

[0068] In this step, the numerical subsystem is used to simulate the near engineering construction disturbance and the stratum response, and the simulation mode is different from that of the complete finite element model in that: the target underground structure and the surrounding soil units thereof are removed in the numerical subsystem, and the Generic test units defined by OpenFresco are added instead, serving as the interface for communication with the agent subsystem; moreover, the removed target underground structure and the surrounding soil units thereof serve as the stratum-structure numerical model with updateable parameters in the agent subsystem.

[0069] In this embodiment, the complete numerical model of the near engineering-stratum-structure system in the example engineering can be established through the OpenSees finite element software; wherein the numerical subsystem and the agent subsystem are constructed based on the complete numerical model.

[0070] ​​In this embodiment, the hybrid test process is initialized, and the load increment in the numerical subsystem is activated. This load increment is used as the unbalanced force to drive the hybrid test process in the first round of virtual iteration. It is determined whether the unbalanced force of the current analysis step is less than or equal to the allowable error. If it is greater, the iteration loop of the nth analysis step (n is a positive integer greater than 1) continues. When performing interactive calculations in the virtual iteration step, the numerical subsystem calculates the predicted displacement based on the unbalanced force of the virtual iteration process and sends it to the agent subsystem for subsequent processing.

[0071] Step 620: Based on the surrogate subsystem, when the numerical subsystem iteratively converges, perform numerical analysis using the predicted displacement data as the boundary displacement load to obtain the predicted force.

[0072] In this step, the agent subsystem interacts with the Generic experimental unit in the numerical subsystem via the LabVIEW communication plugin.

[0073] In this embodiment, the workflow of the agent subsystem includes two parts: prediction and feedback. Specifically, in the prediction process, the agent subsystem receives the predicted displacement sent by the numerical subsystem. , and then Numerical analysis was performed using the boundary displacement load to obtain the predicted force. and will The data is sent to the physics subsystem, which realizes the process of converting boundary displacement into boundary force.

[0074] Step 630: Apply the predicted force based on the physical subsystem and measure the feedback displacement data corresponding to the predicted force.

[0075] In this embodiment, when the predicted force data acts on the boundary of the physical subsystem, the sensing device installed on the physical subsystem can read the feedback displacement data corresponding to the current predicted force data.

[0076] In this embodiment, the physical subsystem includes a formation-structure physical model and an experimental setup.

[0077] The geological-structural physical model, which includes a similar scaled model of the target underground structure and the surrounding soil, is used to withstand the target predicted force of the test device.

[0078] The test apparatus is used to receive the predicted force and convert it into the target predicted force, and to measure the feedback displacement data corresponding to the target predicted force.

[0079] Step 640: Perform parameter inversion on the feedback displacement data and predicted force based on the agent subsystem to obtain high-fidelity physical parameters, and determine the feedback force based on the high-fidelity physical parameters; wherein, the high-fidelity physical parameters include the constitutive parameters of the soil and the material parameters of the underground structure.

[0080] In this step, the agent subsystem includes a formation-structure numerical model containing high-fidelity physical parameters of the physical subsystem and a model parameter inversion module.

[0081] Specifically, in the feedback process, the agent subsystem receives feedback displacement data sent by the physical subsystem and calls the model parameter inversion module to perform back analysis to obtain high-fidelity physical parameters θ (including constitutive parameters of the soil body and material parameters of the underground structure); finally, the agent subsystem recalculates the feedback force θ and sends it to the numerical subsystem, thereby realizing the process of feeding back the real stiffness information of the physical subsystem to the numerical subsystem.

[0082] Step 650: Based on the numerical subsystem, the unbalanced force data is determined according to the predicted force and the feedback force, and the hybrid test process is driven according to the unbalanced force data for multiple rounds of iteration to control the unbalanced force data of the hybrid test process after iteration to be lower than the tolerance.

[0083] In this step, in this embodiment, the numerical subsystem compares the feedback force with the model predicted force to obtain unbalanced force data. If the unbalanced force data is higher than the tolerance, it indicates that the difference between the two is large. Based on the unbalanced force data, a new round of virtual iteration and physical iteration is continued until the unbalanced force is less than the tolerance.

[0084] In this embodiment, in the virtual iteration process of the hybrid test process, the numerical subsystem and the agent subsystem obtain the predicted force on the boundary through interactive calculation as the input of the physical iteration, thereby avoiding the repeated loading and unloading problem caused by the direct interactive iteration of the physical subsystem and the numerical subsystem. In the physical iteration process, the physical subsystem implements loading based on the predicted force, thereby avoiding the problem of disengagement between the loading plate and the soil body, and inputting the physical parameters containing the real stiffness information to the numerical subsystem via the agent subsystem, thereby introducing a new unbalanced force in the numerical subsystem to drive a new round of virtual iteration and physical iteration until the unbalanced force is less than the tolerance.

[0085] In some embodiments, the following problem occurs in the hybrid test process: the soil body has the characteristics of being compressed but not being stretched, and force control is required to prevent the disengagement between the loading plate and the soil body. However, in the hybrid test, the instruction output by the finite element is a displacement instruction, which needs to be converted into a force instruction before loading. This embodiment sets the agent subsystem to convert the communication data on the common boundary of the numerical subsystem, the agent subsystem and the physical subsystem through the finite element model, thereby realizing the conversion of displacement and force boundary conditions.

[0086] ​The application embodiment provided in the application of the test system of the near engineering-stratum-underground structure system provides a control method, the numerical subsystem is set to determine the predicted displacement data according to the load increment, the agent subsystem is set to perform numerical analysis with the predicted displacement data as the boundary displacement load, the predicted force is obtained, the physical subsystem is set to obtain the feedback displacement data corresponding to the predicted force, the feedback displacement data and the predicted force are inversely analyzed by the agent subsystem, the high-fidelity physical parameter is obtained, the feedback force is determined according to the high-fidelity physical parameter, and finally the unbalanced force data is determined according to the predicted force and the feedback force by the numerical subsystem to drive the mixed test process to perform multiple iterations, in the process, the high-fidelity physical parameter of the physical subsystem is obtained by the parameter analysis method of the agent subsystem, so that the boundary force data fed back to the numerical subsystem contains the real stiffness information of the physical subsystem, thereby the high-fidelity substitute model of the physical subsystem directly participates in each iterative calculation process of the numerical subsystem, and the accuracy of the mixed test is improved.

[0087] In some embodiments, loading the predicted force and measuring the feedback displacement data corresponding to the predicted force based on the physical subsystem comprises: determining a target predicted force according to a difference between the predicted force and the lateral pressure corresponding to the gravity of the soil in the agent subsystem; and determining the feedback displacement data according to the target predicted force.

[0088] The application embodiment provided in the application of the test system of the near engineering-stratum-underground structure system provides a control method, the numerical subsystem is set to determine the predicted displacement data according to the load increment, the agent subsystem is set to perform numerical analysis with the predicted displacement data as the boundary displacement load, the predicted force is obtained, the physical subsystem is set to obtain the feedback displacement data corresponding to the predicted force, the feedback displacement data and the predicted force are inversely analyzed by the agent subsystem, the high-fidelity physical parameter is obtained, the feedback force is determined according to the high-fidelity physical parameter, and finally the unbalanced force data is determined according to the predicted force and the feedback force by the numerical subsystem to drive the mixed test process to perform multiple iterations, in the process, the high-fidelity physical parameter of the physical subsystem is obtained by the parameter analysis method of the agent subsystem, so that the boundary force data fed back to the numerical subsystem contains the real stiffness information of the physical subsystem, thereby the high-fidelity substitute model of the physical subsystem directly participates in each iterative calculation process of the numerical subsystem, and the accuracy of the mixed test is improved.

[0089] In this embodiment, only the finite element models in the numerical subsystem and the agent subsystem participate in the iterative calculation in the virtual iteration process of the test system of the near engineering-stratum-underground structure system; when the energy increment of the numerical subsystem between two virtual iterations is less than or equal to the allowable value TOL, the common boundary of the numerical subsystem and the agent subsystem simultaneously satisfies the displacement coordination and force balance conditions; therefore, the boundary force of the agent subsystem at this time is the boundary force of the numerical subsystem; according to the similarity relationship, the boundary force can be converted into the predicted force as the input of the physical iteration process; in the physical iteration process, the physical subsystem applies to the physical model boundary and measures the feedback displacement data of the actuator , and then sends and to the agent subsystem, which calls the model parameter inversion module to obtain the high-fidelity physical parameter and recompute the feedback force Because the physical parameters have been updated, the feedback force is not equal to the predicted force in the early stages of the iteration. Therefore, when the surrogate subsystem sends the feedback force to the numerical subsystem, it introduces an unbalanced force into the entire system. This unbalanced force, containing the stiffness information of the physical subsystem, will drive the system to undergo a new round of virtual and physical iterations, repeating this cycle until... If the value is less than the allowable value, proceed to the next analysis step. The following example uses the first... n Taking one analysis step as an example, the physical information system-driven hybrid test process for underground structures is explained in detail step by step: Figure 7 This is the second flowchart illustrating the control method for the experimental system of the proximity engineering-stratum-subsurface structure system provided by the present invention. Figure 7 As shown, the method includes the following steps: (1) Start the nth analysis step, initialize the virtual iteration step number i, the physical iteration step number j and the virtual iteration convergence state variable Bool; Bool is True to indicate that the virtual iteration has converged, and False to indicate that the virtual iteration has not converged; (2) Activate the load increment in the numerical subsystem This is considered as an unbalanced force driving the first round of virtual iteration. ; (3) Determine whether the unbalanced force in the current analysis step is less than or equal to the allowable error. If it is greater than the allowable error, continue the iteration loop of the nth analysis step. If it is less than or equal to the allowable error, enter the (n+1)th analysis step. (4) Determine whether the j-th physical iteration step meets the convergence condition. If Bool is True, proceed to the i-th physical iteration step, i.e., step (5). If Bool is False, execute the interactive computation of the j-th virtual iteration step. The interactive computation is executed only once within each virtual iteration step. Specifically, the numerical subsystem first... Calculated predicted displacement The data is then sent to the agent subsystem via the LabVIEW communication plugin, which in turn calls the finite element model to calculate the boundary displacements. Prototype boundary prediction power Then, based on the energy convergence criterion of the current numerical subsystem... Determine the data flow direction; when When the value exceeds the allowable value TOL, set Bool to False and... Return to the numerical subsystem. The numerical subsystem receives... Then, proceed to the (j+1)th virtual iteration step and repeat step 4 to obtain the new predicted displacement. According to Calculated. When When the value is less than or equal to the allowable value TOL, set Bool to True and... Send to the physical subsystem and proceed to step (5); (5) Execute the i-th physical iteration step; first, record the maximum virtual iteration step within the i-th physical iteration step. And based on the similarity coefficient S F The physical subsystem will Corresponding prototype boundary prediction power Converted to model boundary predictive power And apply to the boundary of the stratigraphic-structural physical model. and the actual displacement of the actuator ;Then, and The parameters are sent to the agent subsystem as the basis for parameter inversion analysis. The agent subsystem calls the model parameter inversion module to obtain high-fidelity physical parameters. and according to Recalculate the boundary displacements of the finite element model as follows Prototype feedback force at time Based on the similarity coefficient, Converted into model feedback force It is used in conjunction with the predictive power of the model. Comparative analysis; simultaneously, the LabVIEW communication plugin integrates prototype feedback force. Send the data to the numerical subsystem and set Bool to False to complete the i-th physics iteration step; (6) The numerical subsystem receives prototype feedback force Then, increment the physical iteration step i by 1, initialize the virtual iteration step to 0, and then set the prototype feedback force. With prototype predictive power The difference is taken as a new unbalanced force. ; (7) Proceed to step (3), if If the value is less than the allowable value, proceed to the (n+1)th analysis step; otherwise, repeat steps (4) to (7).

[0090] Figure 8 An example is a schematic diagram of the physical structure of an electronic device, such as... Figure 8As shown, the electronic device can include a processor 810, a communications interface 820, a memory 830, and a communications bus 840, wherein the processor 810, the communications interface 820, and the memory 830 complete mutual communication through the communications bus 840. The processor 810 can invoke a logic instruction in the memory 830 to execute a control method of an experimental system of an application near-field engineering-stratum-underground structure system, the method comprising: determining predicted displacement data according to a load increment based on a numerical subsystem in a case of obtaining the load increment through a hybrid test process based on the near-field engineering, the stratum, and the underground structure system; performing numerical analysis on the predicted displacement data as a boundary displacement load when the numerical subsystem iteratively converges, to obtain a predicted force based on a proxy subsystem; loading the predicted force and measuring feedback displacement data corresponding to the predicted force based on a physical subsystem; performing parameter inversion on the feedback displacement data and the predicted force based on the proxy subsystem to obtain high-fidelity physical parameters, and determining feedback force according to the high-fidelity physical parameters; wherein the high-fidelity physical parameters include constitutive parameters of the soil body and material parameters of the underground structure; determining unbalanced force data according to the predicted force and the feedback force based on the numerical subsystem, and driving the hybrid test process for multiple rounds of iteration according to the unbalanced force data, so as to control the unbalanced force data corresponding to the iterated hybrid test process to be lower than a tolerance.

[0091] In addition, the logic instruction in the memory 830 described above can be implemented in the form of a software functional unit and sold or used as an independent product, which can be stored in a computer-readable storage medium. Based on such understanding, the technical solutions of the present application or parts of the technical solutions that essentially contribute to the prior art or parts of the technical solutions can be embodied in the form of a software product, which is stored in a storage medium and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in the various embodiments of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, and various program code storage media.

[0092] In another aspect, the present application also provides a computer program product comprising a computer program, which can be stored on a non-transitory computer-readable storage medium, and the computer program, when executed by a processor, enables a computer to perform the control method of the test system for applying the near-field engineering-stratum-underground structure system, which comprises: determining, by the numerical subsystem, predicted displacement data according to a load increment in a case where the load increment is obtained through a hybrid test process based on the near-field engineering, the stratum and the underground structure system; performing, by the surrogate subsystem, numerical analysis on the predicted displacement data as a boundary displacement load when the numerical subsystem converges iteratively, to obtain a predicted force; loading, by the physical subsystem, the predicted force and measuring feedback displacement data corresponding to the predicted force; performing, by the surrogate subsystem, parameter inversion on the feedback displacement data and the predicted force to obtain high-fidelity physical parameters, and determining feedback force according to the high-fidelity physical parameters; wherein the high-fidelity physical parameters comprise constitutive parameters of the soil body and material parameters of the underground structure; determining, by the numerical subsystem, unbalanced force data according to the predicted force and the feedback force, and driving the hybrid test process to perform multiple rounds of iteration according to the unbalanced force data, so as to control the unbalanced force data corresponding to the hybrid test process after iteration to be lower than a tolerance.

[0093] In another aspect, the present application also provides a non-transitory computer-readable storage medium having a computer program stored thereon, and the computer program, when executed by a processor, implements the control method of the test system for applying the near-field engineering-stratum-underground structure system, which comprises: determining, by the numerical subsystem, predicted displacement data according to a load increment in a case where the load increment is obtained through a hybrid test process based on the near-field engineering, the stratum and the underground structure system; performing, by the surrogate subsystem, numerical analysis on the predicted displacement data as a boundary displacement load when the numerical subsystem converges iteratively, to obtain a predicted force; loading, by the physical subsystem, the predicted force and measuring feedback displacement data corresponding to the predicted force; performing, by the surrogate subsystem, parameter inversion on the feedback displacement data and the predicted force to obtain high-fidelity physical parameters, and determining feedback force according to the high-fidelity physical parameters; wherein the high-fidelity physical parameters comprise constitutive parameters of the soil body and material parameters of the underground structure; determining, by the numerical subsystem, unbalanced force data according to the predicted force and the feedback force, and driving the hybrid test process to perform multiple rounds of iteration according to the unbalanced force data, so as to control the unbalanced force data corresponding to the hybrid test process after iteration to be lower than a tolerance.

[0094] The device embodiments described above are merely illustrative, wherein the units described as separate components can or can not be physically separate, and the components displayed as units can or can not be physical units, i.e., can be located in one place, or can be distributed to multiple network units. Part or all of the modules can be selected to achieve the purposes of the embodiments according to actual needs. Those skilled in the art can understand and implement without creative labor.

[0095] Through the description of the above embodiments, those skilled in the art can clearly understand that the embodiments can be realized by means of software and the necessary general hardware platform, and of course can also be realized by hardware. Based on such understanding, the above technical solutions can be embodied in the form of a software product, which can be stored in a computer readable storage medium, such as a ROM / RAM, a magnetic disk, an optical disk, etc., and includes a number of instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute the methods described in each embodiment or some parts of the embodiments.

[0096] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A test system for applying near-field engineering-geologic-underground structure systems, characterized by, The method comprises the following steps: a numerical subsystem is used to determine predicted displacement data according to a load increment obtained by a hybrid test process based on a near-proximity engineering, a stratum and a subsurface structure system; an agent subsystem is used to perform numerical analysis with the predicted displacement data as a boundary displacement load when the numerical subsystem converges iteratively, to obtain a predicted force; a physical subsystem is used to load the predicted force and measure feedback displacement data corresponding to the predicted force; the agent subsystem is further used to perform parameter inversion on the feedback displacement data and the predicted force, to obtain high-fidelity physical parameters, and determine a feedback force according to the high-fidelity physical parameters; wherein the high-fidelity physical parameters include constitutive parameters of a soil body and material parameters of a subsurface structure; the numerical subsystem is further used to determine unbalanced force data according to the predicted force and the feedback force, and drive the hybrid test process for multiple rounds of iteration according to the unbalanced force data, to control the unbalanced force data corresponding to the hybrid test process after iteration to be lower than a tolerance.

2. The test system for applying near-field engineering-geologic-underground structure systems according to claim 1, characterized in that, The numerical subsystem comprises: a near-proximity engineering and stratum numerical model used to simulate construction disturbance data of a near-proximity engineering and stratum response data; a test unit connected with a LabVIEW communication plug-in, the test unit being used to determine predicted displacement data according to the construction disturbance data and the stratum response data; wherein the LabVIEW communication plug-in is used to realize communication of at least 100 degrees of freedom, and the upper limit of the number of degrees of freedom depends on the available memory of a computer.

3. The test system for applying near-field engineering-geologic-underground structure systems according to claim 1, wherein, The physical subsystem comprises: a test device used to receive the predicted force and convert it into a target predicted force, and measure feedback displacement data corresponding to the target predicted force; a stratum-structure physical model including a similar scaled model of a target subsurface structure and surrounding soil, the stratum-structure physical model being used to bear the target predicted force of the test device.

4. The test system for applying near-field engineering-geologic-underground structure systems according to claim 1, wherein The agent subsystem comprises: a stratum-structure numerical model containing high-fidelity physical parameters of the physical subsystem; a model parameter inversion module.

5. The test system for applying near-field engineering-geologic-underground structure systems according to claim 1 or 3, characterized in that, The physical subsystem comprises a corresponding boundary of a vertical loading plate, a corresponding boundary of a horizontal loading plate and a corresponding boundary of a bottom plate, the corresponding boundary of the loading plate and the corresponding boundary of the bottom plate are each provided with a plurality of nodes, the vertical degrees of freedom of the nodes of the corresponding boundary of the vertical loading plate and the corresponding boundary of the bottom plate are partitioned and bound, and the vertical degrees of freedom of the nodes of each corresponding boundary of the horizontal loading plate are partitioned and bound.

6. The test system for applying near-field engineering-geologic-underground structure systems according to claim 3, wherein The test device is further used to apply the target predicted force to the stratum-structure physical model; wherein the target predicted force is determined based on a difference between the predicted force and a lateral pressure corresponding to the gravity of the soil body in the agent subsystem.

7. A control method of a test system applying a near-field engineering-formation-underground structure system, characterized by, The method comprises the following steps: a numerical subsystem is used to determine predicted displacement data according to a load increment obtained by a hybrid test process based on a near-proximity engineering, a stratum and a subsurface structure system; an agent subsystem is used to perform numerical analysis with the predicted displacement data as a boundary displacement load when the numerical subsystem converges iteratively, to obtain a predicted force; a physical subsystem is used to load the predicted force and measure feedback displacement data corresponding to the predicted force; The agent subsystem is used for parameter inversion on the feedback displacement data and the predicted force to obtain high-fidelity physical parameters, and feedback force is determined according to the high-fidelity physical parameters; wherein the high-fidelity physical parameters include constitutive parameters of the soil body and material parameters of the underground structure; The numerical subsystem is used for determining unbalanced force data according to the predicted force and the feedback force, and driving the mixed test process for multiple rounds of iterations according to the unbalanced force data, so that the unbalanced force data corresponding to the iterated mixed test process is lower than the tolerance.

8. The control method of the test system for applying near-fault engineering-formation-underground structure system according to claim 7, characterized by, The physical subsystem is used for loading the predicted force and measuring feedback displacement data corresponding to the predicted force, and the feedback displacement data comprises: A target predicted force is determined according to a difference between the predicted force and a lateral pressure corresponding to gravity of the soil body in the agent subsystem; The feedback displacement data is determined according to the target predicted force.

9. An electronic device comprising a memory, a processor, and a computer program stored on the memory and running on the processor, characterized in that, The processor executes the computer program to realize the control method of the test system for the near engineering-stratum-underground structure system as claimed in any one of claims 7 to 8.

10. A non-transitory computer-readable storage medium having stored thereon a computer program, characterized in that, The computer program is executed by the processor to realize the control method of the test system for the near engineering-stratum-underground structure system as claimed in any one of claims 7 to 8.

Images