Dam bag residual strength safety coefficient determination method and equipment

Abstract

The invention discloses a dam bag residual strength safety coefficient determination method and equipment, and relates to the field of dam safety evaluation.The method comprises the steps that a target dam bag simulation model is established according to target dam bag geometric parameters and preset target dam bag mechanical property parameters, and first dam bag data are calculated based on the model; wherein the target dam bag is a dam bag of a running rubber dam; obtaining second dam bag data, and calculating a relative error between the first dam bag data and the second dam bag data; when the relative error is not within the preset range, optimizing a preset target dam bag mechanical property parameter in the target dam bag simulation model, recalculating the relative error, and when the relative error is within the preset range, determining the preset target dam bag mechanical property parameter as a real target dam bag mechanical property parameter; and calculating the residual strength safety coefficient of the target dam bag in combination with the mechanical property parameters of the real target dam bag and the maximum dam height working condition of the target dam bag simulation model. According to the method, the target dam bag residual strength safety coefficient can be accurately determined.

Description

Technical Field

[0001] The present application relates to the field of dam safety evaluation, and in particular to a method and device for determining the safety factor of the residual strength of a dam bag. Background Art

[0002] Rubber dams are hydraulic structures constructed from polymer materials. Compared to traditional dams, they offer advantages such as simple structure, low cost, short construction time, and easy maintenance. However, the dam bag, the primary structural component of a rubber dam, suffers from shortcomings such as poor durability and susceptibility to aging, making accurate estimation of its service life difficult. Experience from most rubber dam projects indicates a service life of 13-25 years. With increasing service life, the bag's reliability decreases, potentially causing it to burst and flood. Therefore, evaluating the bag's safety is crucial to ensuring the safe operation of rubber dams. Existing dam bag strength safety assessments primarily rely on on-site testing, service life, and a formula for calculating the bag's radial strength.

[0003] At present, the main factor affecting the strength safety evaluation of the dam bag is the residual strength safety factor of the dam bag. The review of the residual strength safety factor of the dam bag adopts the "Technical Specifications for Rubber Dam Engineering" (GB / T 50979), which does not take into account the current operating status of the dam bag, resulting in inaccurate residual strength safety factor of the dam bag. Summary of the Invention

[0004] The purpose of this application is to provide a method and device for determining the residual strength safety factor of a dam bag, which can accurately calculate the residual strength safety factor of a target dam bag.

[0005] To achieve the above objectives, this application provides the following solutions:

[0006] In a first aspect, the present application provides a method for determining the residual strength safety factor of a dam bag, comprising the following steps:

[0007] Step 1: Obtain the target dam bag geometric parameters and preset target dam bag mechanical performance parameters, and establish a target dam bag simulation model based on the target dam bag geometric parameters and preset target dam bag mechanical performance parameters; the target dam bag is a running rubber dam bag.

[0008] Step 2: Calculate the first dam bag data based on the target dam bag simulation model.

[0009] Step 3: Compare the first dam bag data with the second dam bag data to calculate the relative error; wherein the second dam bag data is the actual measurement data obtained by the measuring device placed on the target dam bag.

[0010] Step 4: Determine whether the relative error is within a preset range, and when the relative error is not within the preset range, optimize the preset target dam bag mechanical performance parameters required for constructing the target dam bag simulation model, and then establish a dam bag simulation model based on the target dam bag geometric parameters and the optimized preset target dam bag mechanical performance parameters, return to step 2, and when the relative error is within the preset range, determine the preset target dam bag mechanical performance parameters as the true target dam bag mechanical performance parameters.

[0011] Step 5: Based on the actual target dam bag mechanical performance parameters and the maximum dam height working condition of the target dam bag simulation model, calculate the target dam bag radial maximum strength, and based on the target dam bag radial maximum strength, calculate the target dam bag residual strength safety factor.

[0012] Optionally, the target dam bag simulation model is a three-dimensional finite element model; the first dam bag data includes finite element simulated displacement and finite element simulated strain; and the second dam bag data includes measured displacement and measured strain.

[0013] Optionally, the measuring device arranged on the target dam bag includes a fiber optic Bragg grating sensor and a total station; the fiber optic Bragg grating sensor and the reflector of the total station are arranged on both sides of the axial center line of the target dam bag, 1 m apart in the axial direction; the arrangement positions of the fiber optic Bragg grating sensor and the reflector of the total station include at least: the axial middle of the target dam bag, the cross-sectional dam top and the downstream position of the target dam bag.

[0014] Optionally, the process of determining the measured displacement is:

[0015] When the target dam bag is at a first height, first position information of the target dam bag is acquired using a total station.

[0016] When the target dam bag is at the second height, second position information of the target dam bag is acquired using a total station.

[0017] The measured displacement is determined according to the acquired first position information and the second position information.

[0018] Optionally, the process of determining the measured strain is:

[0019] When the target dam bag is at a first height, first deformation information of the target dam bag is acquired by using a fiber grating sensor.

[0020] When the target dam bag is at a second height, the fiber grating sensor is used to obtain second deformation information of the target dam bag.

[0021] The measured strain is determined according to the acquired first deformation information and the second deformation information.

[0022] Optionally, optimizing preset target dam bag mechanical performance parameters in the target dam bag simulation model specifically includes:

[0023] The least squares method is used to optimize the preset target dam bag mechanical performance parameters in the target dam bag simulation model.

[0024] Optionally, the target dam bag mechanical performance parameters include elastic modulus and Poisson's ratio.

[0025] Optionally, calculating the target dam bag radial maximum strength based on the actual target dam bag mechanical performance parameters and the maximum dam height working condition of the target dam bag simulation model includes:

[0026] According to the elastic modulus and Poisson's ratio of the actual target dam bag mechanical performance parameters, combined with the finite element simulation of the maximum dam height working condition, the radial maximum strength of the target dam bag is calculated.

[0027] Optionally, the calculation formula for the target dam bag residual strength safety factor is:

[0028] Safety factor of target dam bag residual strength = target dam bag tape strength / target dam bag radial maximum strength.

[0029] In a second aspect, the present application provides a computer device comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement any of the above-described methods for determining the residual strength safety factor of a dam bag.

[0030] In a third aspect, the present application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements any of the above-mentioned methods for determining the residual strength safety factor of a dam bag.

[0031] In a fourth aspect, the present application provides a computer program product, comprising a computer program, which, when executed by a processor, implements any of the above-mentioned methods for determining the residual strength safety factor of a dam bag.

[0032] According to the specific embodiments provided in this application, this application discloses the following technical effects:

[0033] The present application provides a method and device for determining the residual strength safety factor of a dam bag, the method comprising: first, obtaining target dam bag geometric parameters and preset target dam bag mechanical performance parameters, and establishing a target dam bag simulation model, wherein the target dam bag is a running rubber dam bag; second, calculating first dam bag data based on the target dam bag simulation model; third, comparing the first dam bag data with the second dam bag data, and calculating a relative error; then, determining whether the relative error is within a preset range, and when the relative error is not within the preset range, optimizing the preset target dam bag required for constructing the target dam bag simulation model. Mechanical performance parameters, then based on the target dam bag geometric parameters and the optimized preset target dam bag mechanical performance parameters, a dam bag simulation model is established, the first dam bag data is recalculated, and the relative error between the first dam bag data and the second dam bag data is calculated. When the relative error is within the preset range, the preset target dam bag mechanical performance parameters are determined as the true target dam bag mechanical performance parameters; finally, the target dam bag radial maximum strength is calculated based on the true target dam bag mechanical performance parameters and the maximum dam height working condition of the target dam bag simulation model, and the target dam bag residual strength safety factor is calculated based on the target dam bag radial maximum strength. This application calculates the first dam bag data using the target dam bag simulation model, obtains the measured second dam bag data using a measurement device installed on the target dam bag, and calculates the relative error between the first dam bag data and the second dam bag data, continuously correcting the mechanical performance parameters of the target dam bag simulation model. Since the mechanical performance parameters of the corrected target dam bag simulation model can more accurately reflect the true mechanical properties of the running rubber dam bag, the target dam bag radial maximum strength can be accurately calculated, thereby improving the accuracy of the residual strength safety factor of the running rubber dam bag that is finally determined. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0035] Figure 1 This is an application environment diagram of a method for determining the residual strength safety factor of a dam bag provided in Example 1 of the present application;

[0036] Figure 2 A flow chart of a method for determining the residual strength safety factor of a dam bag provided in Example 1 of the present application;

[0037] Figure 3 This is a position diagram of the fiber Bragg grating sensor of Example 1 of the present application;

[0038] Figure 4 This is a diagram showing the positions of the reflective sheets of the total station in Example 1 of the present application;

[0039] Figure 5 This is a diagram showing the locations for attaching the fiber grating sensor and the total station reflector in Example 1 of the present application;

[0040] Figure 6 A flow chart of a method for determining the residual strength safety factor of a dam bag provided in Example 2 of the present application;

[0041] Figure 7 A schematic diagram of the structure of a computer device provided in Example 3 of the present application. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0043] In related technologies, the safety evaluation of dam bag strength is mainly based on on-site testing, years of use and the radial strength calculation formula of the dam bag to determine the safety of the dam bag.

[0044] On-site inspections primarily focus on the appearance of rubber dams, including wrinkles, powdering, cracks, bubbles, damage, aging, wear, repairs, and the sealability of the dam bags. However, on-site sampling of the main stress-bearing areas of the rubber dam bags during operation is difficult to achieve. Physical and mechanical properties such as tensile strength and elongation cannot be tested, making it difficult to quantitatively determine the remaining service life of the dam bags.

[0045] In terms of service life, although the service life of dam bags is specified when they leave the factory, the operating environment of dam bags is complex and changeable. Some dam bags age quickly and experience severe strength loss. They may have the risk of explosion after only a few years of operation, which is significantly different from the factory-specified service life of dam bags. Therefore, it is inaccurate to evaluate the safety of dam bags based on their operating years and the years they have been used since leaving the factory.

[0046] At present, the main factor affecting the strength safety evaluation of the dam bag is the residual strength safety factor of the dam bag. The review of the residual strength safety factor of the dam bag adopts the "Technical Specification for Rubber Dam Engineering" (GB / T50979), which stipulates that the radial design strength of the dam bag can be calculated according to the following formula: Where T is the radial strength of the dam bag (kN / m); γ is the density of water (10kN / m 3); α is the internal and external pressure ratio of the dam bag; H1 is the designed dam height (m). However, this formula is mainly used to calculate the radial strength of newly built dam bags. In actual operation, dam bags age and deteriorate over time, and their geometric parameters and mechanical performance parameters will change significantly after filling with water. This formula does not consider the current operating state of the dam bag, resulting in an inaccurate residual strength safety factor of the dam bag, making it difficult to accurately evaluate the safety of the dam bag in operation.

[0047] Based on the applicant's research on the above-mentioned related technologies, a method and equipment for determining the residual strength safety factor of a dam bag are provided, aiming to accurately determine the residual strength safety factor of the dam bag, thereby improving the accuracy of the safety evaluation of the dam bag in operation of rubber dams.

[0048] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0049] The method for determining the residual strength safety factor of the dam bag provided in the embodiment of the present application can be applied to Figure 1In the application environment shown, terminal 102 communicates with server 104 via a network. A data storage system can store data that server 104 needs to process. The data storage system can be set up separately, integrated with server 104, or located in the cloud or on another server. Terminal 102 can send target dam bag geometric parameters and preset target dam bag mechanical performance parameters to server 104. After receiving the target dam bag geometric parameters and preset target dam bag mechanical performance parameters, server 104 establishes a dam bag simulation model based on the target dam bag geometric parameters and preset target dam bag mechanical performance parameters; the target dam bag is a running rubber dam bag. Then, server 104 calculates first dam bag data based on the target dam bag simulation model. Server 104 then compares the first dam bag data with second dam bag data to calculate the relative error; the second dam bag data is actual measurement data obtained by a measurement device deployed on the target dam bag. Next, server 104 determines whether the relative error is within a preset range. If the relative error is not within the preset range, server 104 optimizes the preset target dam bag mechanical performance parameters in the target dam bag simulation model, then re-establishes the target dam bag simulation model, recalculates the first dam bag data, and recalculates the relative error. If the relative error is within the preset range, server 104 determines the preset target dam bag mechanical performance parameters as the true target dam bag mechanical performance parameters. Finally, server 104 calculates the target dam bag's maximum radial strength based on the true target dam bag mechanical performance parameters and the maximum dam height condition of the target dam bag simulation model. Based on the target dam bag's maximum radial strength, server 104 also calculates the target dam bag's residual strength safety factor. Server 104 may provide feedback on the target dam bag's residual strength safety factor to terminal 102. In addition, in some embodiments, the method for determining the residual strength safety factor of the dam bag can also be implemented independently by the server 104 or the terminal 102. For example, the terminal 102 can directly process the target dam bag geometric parameters and the preset target dam bag mechanical performance parameters to obtain the target dam bag residual strength safety factor, or the server 104 can obtain the target dam bag geometric parameters and the preset target dam bag mechanical performance parameters from the data storage system, and process the target dam bag geometric parameters and the preset target dam bag mechanical performance parameters to obtain the target dam bag residual strength safety factor.

[0050] Terminal 102 may include, but is not limited to, various desktop computers, laptops, smartphones, tablet computers, IoT devices, and portable wearable devices. IoT devices may include smart speakers, smart TVs, smart air conditioners, and smart car devices. Portable wearable devices may include smart watches, smart bracelets, and head-mounted devices. Server 104 may be implemented as a standalone server or a server cluster consisting of multiple servers, or may be a cloud server.

[0051] In an exemplary embodiment, Figure 2 As shown, a method for determining the safety factor of the residual strength of a dam bag is provided, the method comprising the following steps:

[0052] Step 201: obtaining target dam bag geometric parameters and preset target dam bag mechanical performance parameters, and establishing a target dam bag simulation model based on the target dam bag geometric parameters and the preset target dam bag mechanical performance parameters.

[0053] Among them, the target dam bag is a running rubber dam bag, the target dam bag simulation model is a three-dimensional finite element model, and the preset mechanical performance parameters include elastic modulus and Poisson's ratio.

[0054] Step 202: Calculate first dam bag data based on the target dam bag simulation model.

[0055] Step 203: Compare the first dam bag data with the second dam bag data to calculate a relative error; wherein the second dam bag data is actual measurement data obtained by a measurement device placed on the target dam bag.

[0056] Furthermore, in step 203, the measuring device arranged on the target dam bag includes a fiber optic Bragg grating sensor and a total station; the fiber optic Bragg grating sensor and the reflector of the total station are arranged on both sides of the axial center line of the target dam bag, 1 meter apart in the axial direction; the arrangement positions of the fiber optic Bragg grating sensor and the reflector of the total station at least include: the axial middle of the target dam bag, the cross-sectional dam top and the downstream position of the target dam bag.

[0057] In step 203 , the first dam bag data includes finite element simulated displacement and finite element simulated strain; the second dam bag data includes measured displacement and measured strain.

[0058] The process of determining the measured displacement is as follows:

[0059] Step A: When the target dam bag is at a first height, first position information of the target dam bag is obtained using a total station.

[0060] Step B: When the target dam bag is at the second height, the second position information of the target dam bag is obtained using a total station.

[0061] Step C: Determine the measured displacement based on the acquired first position information and the second position information.

[0062] During the determination of the measured displacement, the target dam bag may be raised or lowered so that the target dam bag reaches a second height from a first height.

[0063] The process of determining the measured strain is:

[0064] Step a: When the target dam bag is at a first height, first deformation information of the target dam bag is acquired using a fiber grating sensor.

[0065] Step b: when the target dam bag is at the second height, obtaining second deformation information of the target dam bag using a fiber grating sensor.

[0066] Step c: determining the measured strain based on the acquired first deformation information and the acquired second deformation information.

[0067] During the determination of the measured strain, the target dam bag may be raised or lowered so that the target dam bag reaches a second height from a first height.

[0068] The calculation formula of the relative error in step 203 is:

[0069]

[0070] Among them, δ is the relative error, ε s is the strain simulated by finite element, ε m is the measured strain, δ s is the displacement simulated by finite element, δ m is the measured displacement, and n is the number of tests.

[0071] Step 204: Determine whether the relative error is within a preset range, if so, execute step 205, otherwise execute step 206.

[0072] Step 205 : Determine the preset target dam bag mechanical performance parameters as the actual target dam bag mechanical performance parameters, and execute step 207 .

[0073] Step 206: Optimize the preset target dam bag mechanical performance parameters required for constructing the target dam bag simulation model, then establish the dam bag simulation model based on the target dam bag geometric parameters and the optimized preset target dam bag mechanical performance parameters, and return to step 202.

[0074] The preset range of the relative error is 1% to 5%.

[0075] In step 206, the optimization of the preset target dam bag mechanical performance parameters required for constructing the target dam bag simulation model specifically includes: optimizing the preset target dam bag mechanical performance parameters in the target dam bag simulation model using the least squares method:

[0076] When the finite element simulated strain (or displacement) is greater than the measured strain (or displacement), the preset elastic modulus and Poisson's ratio will be appropriately increased.

[0077] When the finite element simulated strain (or displacement) is smaller than the measured strain (or displacement), the preset elastic modulus and Poisson's ratio are appropriately reduced.

[0078] Step 207: Calculate the target dam bag's radial maximum strength based on the actual target dam bag's mechanical performance parameters and the maximum dam height condition of the target dam bag's simulation model, and calculate the target dam bag's residual strength safety factor based on the target dam bag's radial maximum strength.

[0079] Furthermore, in step 207, based on the actual target dam bag mechanical performance parameters and the maximum dam height working condition of the target dam bag simulation model, calculating the target dam bag radial maximum strength includes:

[0080] According to the elastic modulus and Poisson's ratio of the actual target dam bag mechanical performance parameters, combined with the finite element simulation of the maximum dam height working condition, the radial maximum strength of the target dam bag is calculated.

[0081] Furthermore, based on the elastic modulus and Poisson's ratio of the actual target dam bag mechanical performance parameters, combined with the finite element simulation of the maximum dam height working condition, the target dam bag radial maximum strength is calculated specifically including:

[0082] The elastic modulus and Poisson's ratio of the actual target dam bag mechanical performance parameters and the rubber dam height H1 are input into the three-dimensional finite element model, and the load and boundary conditions are set to perform finite element solution to obtain the radial maximum strength of the target dam bag.

[0083] Among them, the rubber dam height H1 is the maximum dam height, and the internal water pressure head is H O =1.3H1, the axial length of the dam body is 10m; the bottom constraint of the dam body adopts consolidation constraint, and the cross-sections at both ends of the axial direction of the dam body adopt symmetrical displacement constraint.

[0084] Furthermore, in step 207, the target dam bag residual strength safety factor is calculated according to the following formula:

[0085] Safety factor of target dam bag residual strength = target dam bag tape strength / target dam bag radial maximum strength.

[0086] The target dam bag tape strength adopts the reduced value of the factory target dam bag tape strength, and the reduction formula adopts the exponential decay model:

[0087] σ(t)=σ0·e -λt

[0088] Among them, σ(t) is the target dam bag tape strength; σ0 is the factory strength of the dam bag, and λ is the reduction constant.

[0089] Samples were taken from discarded dam bags of the same type and strength tests were performed at different time points. The strength value σ(t) and the corresponding usage time at each time point were recorded to determine the reduction constant λ.

[0090] Further, if Figures 3 to 5As shown in the figure, fiber grating sensors and total station reflectors are arranged on the target dam bag. Figures 3 and 4 In the figure, ① represents the axial middle of the dam bag, ② represents the cross-section of the dam top, and ③-⑤ are the downstream parts.

[0091] The fiber grating sensor and total station reflector are used to monitor the strain and displacement of the target dam bag in real time. The layout method and detection process specifically include:

[0092] Rapidly raise the target dam bag to ensure it does not overflow for a short period of time. Then, attach fiber grating sensors and total station reflectors to the axial center of the target dam bag, the crest of the cross-section, and slightly downstream. Position the fiber grating sensors and total station reflectors approximately 1 meter along the dam axis. Five fiber grating sensors and three reflectors are placed.

[0093] The FBG sensor has a range of ±1000με and is connected to an external monitoring system. The FBG sensor must be sealed to prevent moisture from entering during the raising and lowering of the target dam bag. After installation, the system must be debugged to ensure uninterrupted operation over a long period of time.

[0094] The total station should be fixed in a convenient location for monitoring to detect the displacement of the reflector. The total station must not move during the entire process to ensure the accuracy of the data.

[0095] After the fiber grating sensor and total station are installed and debugged, the height of the target dam bag is raised or lowered by 1.5 to 2 meters. During this process, the fiber grating sensor monitors the strain of the bag in real time, while the total station monitors the displacement of at least three reflectors.

[0096] Example 2

[0097] Furthermore, Figure 6 This is a flow chart of a method for determining the residual strength safety factor of a dam bag, provided in another embodiment of the present application. The method in this embodiment includes three steps: on-site dam bag deformation observation, indoor finite element simulation, and calculation of the residual strength safety factor of the dam bag.

[0098] (1) On-site dam bag deformation observation.

[0099] On-site dam bag deformation observation data includes strain and displacement at the dam bag's lifting and lowering position. Combining historical on-site observation data with finite element calculation results shows that the rubber dam experiences the greatest deformation and stress just downstream of the dam crest. Therefore, it is crucial to monitor strain and displacement at this location. The specific steps are as follows:

[0100] The dam bag was quickly raised to ensure that the bag did not overflow for a short period of time. The axial centerline position of the dam bag was measured on site. Fiber grating sensors and total station reflectors were attached to the axial middle of the dam bag, the top of the cross section, and the downstream side. The fiber grating sensors and total station reflectors were placed approximately 1 meter apart along the axial direction (the fiber grating sensor was attached 0.5 meters to the left of the centerline, and the total station reflector was attached 0.5 meters to the right of the centerline). The fiber grating sensor was then connected to the test system and the total station was fixed to complete the equipment commissioning. Next, the dam bag was raised 1.5 to 2 meters, and the fiber grating sensor was used to monitor the strain of the dam bag in real time. A fixed total station was used to record the displacement of the corresponding reflectors at three dam heights to obtain the measured displacement and strain.

[0101] (2) Indoor finite element simulation.

[0102] First, the actual geometric dimensions of the dam bag are measured, and a three-dimensional finite element model is constructed based on these dimensions. Boundary conditions and load values ​​for different dam heights are set based on actual operating conditions. Then, the elastic modulus and Poisson's ratio of the dam bag material are preliminarily set based on empirical values, and the finite element-simulated strains and displacements are calculated at different dam heights. Next, the finite element-simulated strains and displacements at the same fixed points are compared with the measured strains, and the finite element-simulated displacements and displacements are compared with the measured displacements, and the relative errors are calculated. Finally, the relative errors are determined to determine if they are reasonable. If not, the elastic modulus and Poisson's ratio parameters are adjusted using a least-squares optimization algorithm. This process of simulation, comparison, error calculation, and parameter adjustment is repeated until the errors are reduced to an acceptable range. When the relative errors between the measured strains and displacements and the finite element-calculated values ​​are between 1% and 5%, the elastic modulus and Poisson's ratio are considered reasonable and are used as the actual elastic modulus and Poisson's ratio of the dam bag.

[0103] (3) Calculation of safety factor of residual strength of dam bag.

[0104] After obtaining the true elastic modulus and Poisson's ratio of the dam bag, the finite element method was used to simulate the maximum dam height working condition, calculate the maximum radial strength of the dam bag, and calculate the residual strength safety factor of the dam bag based on the maximum radial strength of the dam bag and the strength of the dam bag tape.

[0105] The present application also provides an application scenario for safety evaluation of rubber dam bags in operation, which includes a link for determining the safety factor of the residual strength of the dam bag and a link for evaluating the safety of the rubber dam bag in operation. Specifically: the link for determining the safety system of the dam bag residual strength adopts the method for determining the safety factor of the residual strength of the dam bag provided in this application, including on-site dam bag data observation, indoor finite element review calculation link and dam bag residual strength safety factor calculation link. The link for evaluating the safety of rubber dam bags in operation is a comprehensive evaluation based on the safety factor of the residual strength of the dam bag and other indicators that affect the safety of the dam bag. The safety evaluation indicators of dam bags in operation include appearance quality (wrinkles, aging, wear, breakage, bubbles, cracks), service life, hardness, resistance to air aging, resistance to fresh water aging, bag wall strength, safety factor of the residual strength of the dam bag, etc. However, appearance quality, service life, hardness, etc. can only qualitatively determine the current quality of the dam bag. Resistance to air aging, resistance to fresh water aging, and bag wall strength are difficult to obtain when sampling is not possible. The residual strength safety factor of the dam bag in this application is the most important indicator for evaluating whether the rubber dam bag is safe in operation. Determining the residual strength safety factor of the dam bag is a key link in the safety evaluation of the rubber dam bag in operation.

[0106] Example 3

[0107] In an exemplary embodiment, a computer device is provided. The computer device may be a server or a terminal. The internal structure diagram thereof may be as follows: Figure 7 As shown. The computer device includes a processor, a memory, an input / output interface (Input / Output, abbreviated as I / O) and a communication interface. The processor, memory and input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and computer program in the non-volatile storage medium. The database of the computer device is used to store video tag processing data. The input / output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, it implements a method for determining the residual strength safety factor of a dam bag.

[0108] Those skilled in the art will understand that Figure 7 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than shown in the figure, or combine certain components, or have a different component arrangement.

[0109] Example 4

[0110] In an exemplary embodiment, a computer device is further provided, including a memory and a processor. The memory stores a computer program, and the processor implements the steps in the above method embodiments when executing the computer program.

[0111] Example 5

[0112] In an exemplary embodiment, a computer-readable storage medium is provided, storing a computer program. When the computer program is executed by a processor, the steps in the above-mentioned method embodiments are implemented.

[0113] Example 6

[0114] In an exemplary embodiment, a computer program product is provided, including a computer program. When the computer program is executed by a processor, the steps in the above method embodiments are implemented.

[0115] Those skilled in the art will understand that all or part of the processes in the above-mentioned embodiment methods can be implemented by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, database or other media used in the embodiments provided in this application may include at least one of non-volatile and volatile memory. Non-volatile memory may include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory may include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM may be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM).

[0116] The databases involved in the various embodiments provided herein may include at least one of a relational database and a non-relational database. Non-relational databases may include, but are not limited to, distributed databases based on blockchains. The processors involved in the various embodiments provided herein may include, but are not limited to, general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic units, data processing logic units based on quantum computing, and the like.

[0117] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0118] This document uses specific examples to illustrate the principles and implementation methods of this application. The description of the above examples is only intended to help understand the method and core concept of this application. At the same time, for those skilled in the art, based on the concept of this application, there may be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting this application.

Claims

1. A method for determining the residual strength safety factor of a dam bag, characterized in that: The method for determining the residual strength safety factor of the dam bag includes: Step 1: Obtain target dam bag geometric parameters and preset target dam bag mechanical performance parameters, and establish a dam bag simulation model based on the target dam bag geometric parameters and preset target dam bag mechanical performance parameters; the target dam bag is a running rubber dam bag; Step 2: Calculate the first dam bag data based on the target dam bag simulation model; Step 3: Compare the first dam bag data with the second dam bag data to calculate the relative error; wherein the second dam bag data is the actual measured data obtained by the measuring device arranged on the target dam bag; Step 4: Determine whether the relative error is within a preset range, and when the relative error is not within the preset range, optimize the preset target dam bag mechanical performance parameters required for constructing the target dam bag simulation model, and then establish a dam bag simulation model based on the target dam bag geometric parameters and the optimized preset target dam bag mechanical performance parameters, return to step 2, and when the relative error is within the preset range, determine the preset target dam bag mechanical performance parameters as the true target dam bag mechanical performance parameters; Step 5: Based on the actual target dam bag mechanical performance parameters and the maximum dam height condition of the target dam bag simulation model, the target dam bag radial maximum strength is calculated, and based on the target dam bag radial maximum strength, the target dam bag residual strength safety factor is calculated.

2. A method for determining the residual strength safety factor of a dam bag according to claim 1, characterized in that: The target dam bag simulation model is a three-dimensional finite element model; the first dam bag data includes finite element simulated displacement and finite element simulated strain; the second dam bag data includes measured displacement and measured strain.

3. A method for determining the residual strength safety factor of a dam bag according to claim 2, characterized in that: The measuring device arranged on the target dam bag includes a fiber grating sensor and a total station; the fiber grating sensor and the reflector of the total station are arranged on both sides of the axial center line of the target dam bag, 1m apart in the axial direction; the arrangement positions of the fiber grating sensor and the reflector of the total station at least include: the axial middle of the target dam bag, the cross-sectional dam top and the downstream position of the target dam bag.

4. A method for determining the residual strength safety factor of a dam bag according to claim 3, characterized in that: The determination process of the measured displacement is: When the target dam bag is at a first height, obtaining first position information of the target dam bag by using a total station; When the target dam bag is at a second height, obtaining second position information of the target dam bag by using a total station; The measured displacement is determined according to the acquired first position information and the second position information.

5. A method for determining the residual strength safety factor of a dam bag according to claim 3, characterized in that: The process of determining the measured strain is: When the target dam bag is at a first height, obtaining first deformation information of the target dam bag by using a fiber grating sensor; When the target dam bag is at a second height, obtaining second deformation information of the target dam bag by using a fiber grating sensor; The measured strain is determined according to the acquired first deformation information and the second deformation information.

6. A method for determining the residual strength safety factor of a dam bag according to claim 1, characterized in that: Optimize the preset target dam bag mechanical performance parameters in the target dam bag simulation model, including: The least squares method is used to optimize the preset target dam bag mechanical performance parameters in the target dam bag simulation model.

7. A method for determining the residual strength safety factor of a dam bag according to claim 1, characterized in that: The target dam bag mechanical performance parameters include elastic modulus and Poisson's ratio.

8. A method for determining the residual strength safety factor of a dam bag according to claim 1, characterized in that: Based on the actual target dam bag mechanical performance parameters and the maximum dam height condition of the target dam bag simulation model, calculating the target dam bag radial maximum strength includes: According to the elastic modulus and Poisson's ratio of the actual target dam bag mechanical performance parameters, combined with the finite element simulation of the maximum dam height condition, the radial maximum strength of the target dam bag is calculated.

9. A method for determining the residual strength safety factor of a dam bag according to claim 8, characterized in that: The calculation formula of the target dam bag residual strength safety factor is: Safety factor of residual strength of target dam bag = target dam bag tape strength / target dam bag radial maximum strength.

10. A computer device comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the method for determining the residual strength safety factor of a dam bag according to any one of claims 1 to 9.

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