Partitioned self-adaptive vibration aging control method and system for residual stress of steel box girder

Abstract

According to the partition self-adaptive vibration aging control method and system for the residual stress of the steel box girder, partition processing is carried out according to the distribution characteristics of the residual stress of all parts of the steel box girder, the most suitable vibration parameters are matched for different areas, the residual stress elimination rate is remarkably increased, especially the stress elimination effect of a high-stress area is remarkably improved, and the application range of the steel box girder is widened. The function of accurately eliminating the residual stress of different areas of the steel box girder is achieved. According to the method, the vibration-impact composite treatment technology is adopted to eliminate residual stress, a deep pressure stress layer is introduced into a key welding seam area, and the anti-fatigue performance of the welding seam of the steel box girder is greatly improved. According to the method, parameter optimization is completed in a virtual environment through a digital twin-driven virtual debugging technology, so that the field debugging time is remarkably shortened; and meanwhile, due to reasonable vibration parameter setting and an efficient stress relieving effect, the vibration aging treatment time is shortened, and the overall production efficiency is greatly improved.

Description

Technical Field

[0001] This invention belongs to the field of steel structure bridge manufacturing technology, specifically relating to a zoned adaptive vibration aging control method and system for residual stress in steel box girders. Background Technology

[0002] In the construction of steel structure bridges, the steel box girder, as a key load-bearing component, directly affects the safety and service life of the bridge. However, steel box girders are usually welded from a large number of plates and profiles. During the welding process, localized high-temperature heating and rapid cooling inevitably generate residual stress. The presence of residual stress not only reduces the load-bearing capacity of the steel box girder but may also lead to structural deformation, the initiation and propagation of fatigue cracks, and in severe cases, even bridge structural failure.

[0003] Currently, vibration aging technology is one of the commonly used methods to eliminate residual stress in steel box girders. For example, existing technologies employ multiple vibration aging devices to treat the steel beam. By inducing resonance in the steel beam through the exciter, the dynamic stress generated by the resonance is superimposed on the residual stress, exceeding the material's yield limit, thus eliminating the residual stress. However, traditional vibration aging technology still has many shortcomings in practical applications. On the one hand, the structure of steel box girders is complex, and the distribution of residual stress in different parts (such as the top plate, web, diaphragms, and various connecting welds) is extremely uneven. Traditional methods use uniform vibration parameters, making it difficult to accurately address the stress characteristics of each area, resulting in incomplete elimination of residual stress in some high-stress areas. On the other hand, existing technologies rely heavily on manual experience for parameter setting and process control, lacking real-time monitoring and adaptive adjustment mechanisms. They cannot dynamically adjust vibration parameters according to the actual stress changes during the vibration aging process, leading to unstable vibration aging effects and failing to meet the stringent quality requirements of modern bridge construction for steel box girder manufacturing. Furthermore, conventional vibration aging technology only focuses on eliminating residual stress and fails to fully consider improving the fatigue performance of steel box girders. In actual service, steel box girders are subjected to alternating loads for a long time, and fatigue failure is one of their main failure modes. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a zonal adaptive vibration aging control method and system for residual stress in steel box girders, which is used to eliminate residual stress in different regions of steel box girders.

[0005] The technical solution adopted by this invention to solve the above-mentioned technical problems is: a zonal adaptive vibration aging control method for residual stress in steel box girders, comprising the following steps: S1: Residual stress detection and analysis of steel box girders are performed using ultrasonic stress testing or numerical simulation based on finite element analysis. S2: Based on the test results, the steel box girder is divided into zones according to the residual stress level, and a residual stress zoning map is drawn; S3: Arrange multiple vibration sources in different stress regions according to the residual stress zoning map; S4: Real-time acquisition of stress change data of key parts of steel box girder during vibration aging process; S5: Preset stress relief threshold, and continuously relieve stress by adjusting the amplitude, frequency and vibration time of the vibration source in real time to perform conventional vibration aging treatment on the steel box girder; S6: For the critical fatigue-sensitive areas of the steel box girder subjected to repeated loads, a vibration-impact composite treatment is adopted to eliminate residual stress.

[0006] According to the above scheme, in step S2, the steel box girder is divided into high-stress zone, medium-stress zone and low-stress zone. High-stress areas include the area of ​​the full penetration weld between the top plate and the longitudinal ribs, and the connection between the transverse diaphragm and the web. The medium stress zone includes the web butt weld and some secondary stiffening rib welds; Low-stress areas include non-critical load-bearing panel areas.

[0007] Furthermore, in step S3, when comparing the medium stress zone and the low stress zone, the vibrators arranged in the high stress zone are more numerous and have higher power.

[0008] Furthermore, in step S3, when setting the vibrator parameters, High-frequency, high-amplitude vibration parameters are set in the high-stress zone. Through high-frequency, high-amplitude vibration, the material in this zone undergoes sufficient plastic deformation, effectively releasing residual stress. In the medium stress region, medium frequency and medium amplitude parameters are used to achieve effective stress relief with appropriate energy input; Low-frequency, low-amplitude parameters are used in low-stress areas to avoid excessive vibration from causing unnecessary damage to the structure.

[0009] According to the above scheme, in step S3, the vibrator is arranged using digital twin-driven virtual debugging technology. The specific steps are as follows: S31: Based on the BIM model of the steel box girder, a digital twin model of the steel box girder vibration aging is constructed by combining material properties and welding process parameters to simulate the stress change and vibration response of the steel box girder under different vibration parameters; S32: In a virtual environment, simulate and test different numbers of vibration points, vibration point locations, and parameter combinations, analyze the simulation results, and output the optimal vibration aging scheme for a specific steel box girder structure.

[0010] According to the above scheme, in step S4, fiber optic stress sensors are implanted in key parts of the steel box girder to collect stress change data.

[0011] According to the above scheme, the specific steps in step S5 are as follows: When the stress in a certain area drops below the stress relief threshold, the amplitude of the vibration source in that area is reduced. If the stress in the area decreases slowly within a preset time and the decrease is less than a preset percentage, then the frequency of the vibration source should be increased or the vibration time extended.

[0012] According to the above scheme, the specific steps in step S6 are as follows: When using vibration-impact composite treatment, the frequency of the vibration source is reduced to a preset range, so that the steel box girder is in a state of micro-vibration, at which time the internal stress of the material is in a relatively relaxed state. Scanning impacts are performed along the critical fatigue-sensitive area to refine the grains in the critical fatigue-sensitive area with high-frequency impact energy, and a compressive stress layer is introduced on the surface to improve the fatigue resistance of the critical fatigue-sensitive area.

[0013] Zonal adaptive vibration aging control system for residual stress in steel box girders The stress analysis submodule is used to detect and analyze residual stress in steel box girders using ultrasonic stress testing or numerical simulation based on finite element analysis. The stress zoning submodule is used to divide the steel box girder into horizontal zones based on residual stress according to the test results and draw a residual stress zoning map. The vibration source arrangement submodule is used to arrange multiple vibration sources in different stress regions according to the residual stress zoning map. The stress acquisition submodule is used to collect stress change data of key parts of the steel box girder in real time during the vibration aging process; The stress relief submodule is used to preset the stress relief threshold and perform conventional vibration aging treatment on the steel box girder to continuously relieve stress by adjusting the amplitude, frequency and vibration time of the vibration source in real time. The residual stress elimination submodule is used to eliminate residual stress in the critical fatigue-sensitive areas of steel box girders subjected to repeated loads by employing a vibration-impact composite treatment.

[0014] A computer memory storing a computer program executable by a computer processor, the computer program executing a zoned adaptive vibration aging control method for residual stress in a steel box girder.

[0015] The beneficial effects of this invention are as follows: 1. The zonal adaptive vibration aging control method and system for residual stress in steel box girders of the present invention performs zonal processing based on the distribution characteristics of residual stress in different parts of the steel box girder, matching the most suitable vibration parameters to different regions, significantly improving the residual stress elimination rate, especially the stress elimination effect in high-stress areas, and realizing the function of accurately eliminating residual stress in different regions of the steel box girder. Compared with traditional vibration aging technology, the overall residual stress elimination rate is effectively improved, effectively reducing the residual stress level inside the steel box girder. While eliminating residual stress in high-stress areas, it also avoids excessive vibration from causing unnecessary impact on the structure in low-stress areas, thereby improving the structural bearing capacity and stability.

[0016] 2. This invention constructs a closed-loop control system based on real-time stress feedback and adaptive adjustment mechanism by monitoring stress changes during the vibration aging process of steel box girders in real time. The vibration parameters are automatically adjusted according to the actual stress changes of the steel box girder to ensure that the vibration aging is always in the optimal state, thereby improving the stability and reliability of the aging effect. This avoids fluctuations in the aging effect caused by insufficient human experience or unreasonable parameter settings, making the aging effect more stable and reliable, and significantly improving the consistency of product quality.

[0017] 3. This invention employs vibration-impact composite treatment technology to eliminate residual stress and introduces an innovative technical means to simultaneously improve the fatigue resistance of steel box girders. It introduces a deep compressive stress layer into the key weld area, refines the grain structure, significantly improves the fatigue resistance of the steel box girder welds, effectively extends the service life of the steel box girder under alternating loads, and reduces the bridge operation and maintenance costs.

[0018] 4. This invention utilizes digital twin-driven virtual commissioning technology to optimize parameters in a virtual environment, significantly reducing on-site commissioning time. Simultaneously, reasonable vibration parameter settings and efficient stress relief reduce vibration aging treatment time, resulting in a substantial improvement in overall production efficiency. Furthermore, precise parameter control avoids energy waste caused by excessive vibration, demonstrating significant economic benefits.

[0019] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a flowchart of an embodiment of the present invention.

[0022] Figure 2 This is a flowchart illustrating an embodiment of the present invention. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0024] Example 1 See Figure 1 The specific steps of the zoned adaptive vibration aging control method for residual stress in steel box girders are as follows: S1: Residual stress detection and analysis of steel box girders are performed using ultrasonic stress testing or numerical simulation based on finite element analysis. S2: Based on the test results, the steel box girder is divided into zones according to the residual stress level, and a residual stress zoning map is drawn; S3: Arrange multiple vibration sources in different stress regions according to the residual stress zoning map; S4: Real-time acquisition of stress change data of key parts of steel box girder during vibration aging process; S5: Preset stress relief threshold, and continuously relieve stress by adjusting the amplitude, frequency and vibration time of the vibration source in real time to perform conventional vibration aging treatment on the steel box girder; S6: For the critical fatigue-sensitive areas of the steel box girder subjected to repeated loads, a vibration-impact composite treatment is adopted to eliminate residual stress.

[0025] Furthermore, in step S2, the steel box girder is divided into high-stress zone, medium-stress zone and low-stress zone. High-stress areas include the area of ​​the full penetration weld between the top plate and the longitudinal ribs, and the connection between the transverse diaphragm and the web. The medium stress zone includes the web butt weld and some secondary stiffening rib welds; Low-stress areas include non-critical load-bearing panel areas.

[0026] Furthermore, in step S3, the medium stress zone and the low stress zone are compared, and the vibrators arranged in the high stress zone are more numerous and have higher power.

[0027] Furthermore, in step S3, when setting the vibrator parameters, High-frequency, high-amplitude vibration parameters are set in the high-stress zone. Through high-frequency, high-amplitude vibration, the material in this zone undergoes sufficient plastic deformation, effectively releasing residual stress. In the medium stress region, medium frequency and medium amplitude parameters are used to achieve effective stress relief with appropriate energy input; Low-frequency, low-amplitude parameters are used in low-stress areas to avoid excessive vibration from causing unnecessary damage to the structure.

[0028] In step S3, the vibrator is arranged using digital twin-driven virtual debugging technology. The specific steps are as follows: S31: Based on the BIM model of the steel box girder, a digital twin model of the steel box girder vibration aging is constructed by combining material properties and welding process parameters to simulate the stress change and vibration response of the steel box girder under different vibration parameters; S32: In a virtual environment, simulate and test different numbers of vibration points, vibration point locations, and parameter combinations, analyze the simulation results, and output the optimal vibration aging scheme for a specific steel box girder structure.

[0029] In step S4, fiber optic stress sensors are implanted in key parts of the steel box girder to collect stress change data.

[0030] According to the above scheme, the specific steps in step S5 are as follows: When the stress in a certain area drops below the stress relief threshold, the amplitude of the vibration source in that area is reduced. If the stress in the area decreases slowly within a preset time and the decrease is less than a preset percentage, then the frequency of the vibration source should be increased or the vibration time extended.

[0031] In step S6, the specific steps are as follows: When using vibration-impact composite treatment, the frequency of the vibration source is reduced to a preset range, so that the steel box girder is in a state of micro-vibration, at which time the internal stress of the material is in a relatively relaxed state. Scanning impacts are performed along the critical fatigue-sensitive area to refine the grains in the critical fatigue-sensitive area with high-frequency impact energy, and a compressive stress layer is introduced on the surface to improve the fatigue resistance of the critical fatigue-sensitive area.

[0032] This embodiment performs zoned processing based on the distribution characteristics of residual stress in different parts of the steel box girder, matching the most suitable vibration parameters to different areas, significantly improving the residual stress elimination rate, especially the stress elimination effect in high-stress areas, and achieving the function of precisely eliminating residual stress in different areas of the steel box girder. Compared with traditional vibration aging technology, the overall residual stress elimination rate is effectively improved, effectively reducing the residual stress level inside the steel box girder. While eliminating residual stress in high-stress areas, it also avoids excessive vibration from causing unnecessary impact on the structure in low-stress areas, thereby improving the structural bearing capacity and stability.

[0033] Example 2 The steps in this embodiment are the same as in Embodiment 1, the difference being that each step is applied to a specific instance. See also Figure 2 Specifically, it includes the following steps: Step 1: Before vibration aging treatment, use ultrasonic stress detection technology or numerical simulation method based on finite element analysis to conduct comprehensive residual stress detection and analysis on the steel box girder. Step 2: Based on the test results, the steel box girder is divided into zones according to the residual stress level, and a detailed residual stress zoning map is drawn. In Step 2, the steel box girder is divided into zones: high stress zone (such as the area of ​​the penetration weld between the top plate and the longitudinal ribs, the connection between the transverse diaphragm and the web), medium stress zone (web butt weld, some secondary stiffening rib welds), and low stress zone (non-critical load-bearing panel area).

[0034] Step 3: Based on the residual stress zoning map, arrange multiple vibrators reasonably in different stress areas; When arranging vibrators, increase the number of vibrators and use high-power vibrators in high-stress areas to provide strong excitation force; in medium-stress and low-stress areas, reduce the number of vibrators or reduce the power of vibrators according to the actual situation.

[0035] In high-stress areas, high-frequency, high-amplitude vibration parameters are set to induce sufficient plastic deformation in the material and effectively release residual stress. In medium-stress areas, medium-frequency, medium-amplitude parameters are used to effectively eliminate stress with appropriate energy input. In low-stress areas, low-frequency, low-amplitude parameters are used to avoid excessive vibration from causing unnecessary impact on the structure.

[0036] To determine a more reasonable vibrator arrangement scheme, virtual commissioning technology driven by digital twins was adopted: Step 31: Based on the BIM model of the steel box girder, and combining material properties (such as elastic modulus and Poisson's ratio) and welding process parameters (weld dimensions, heat input, etc.), a vibration aging digital twin model of the steel box girder is constructed using professional finite element software. This model can accurately simulate the stress changes and vibration response of the steel box girder under different vibration parameters. Step 32: In a virtual environment, simulate and test different numbers of vibration points (e.g., comparing 2 or 4 vibrators), vibration point locations (simulating symmetrical and asymmetrical arrangements), and parameter combinations (different combinations of frequency, amplitude, and time). Analyze the simulation results and output the optimal vibration aging scheme for a specific steel box girder structure. Then, apply this optimized scheme to the actual vibration aging treatment of the steel box girder to guide on-site construction and reduce on-site commissioning time and costs.

[0037] Step 4: High-precision fiber optic stress sensors are implanted in key parts of the steel box girder (such as representative welds in each stress zone) to collect stress change data of the steel box girder in real time during the vibration aging process and transmit the data to the central controller in real time. Step 5: Preset the "stress relief threshold" in the central controller, and adjust the amplitude, frequency and vibration time of the vibrator in real time through the central controller to perform conventional vibration aging treatment on the steel box girder to ensure that the stress is continuously and effectively eliminated; When the central controller's sensors detect that the stress in a certain area has dropped below a threshold, the controller automatically issues a command to reduce the amplitude of the vibrator in that area. If the stress in that area decreases slowly within 10 minutes, with a decrease of less than 10%, the controller automatically increases the frequency of the vibrator or extends the vibration time to ensure that the stress is continuously and effectively eliminated.

[0038] Step 6: After completing the conventional vibration aging treatment, for the key fatigue-sensitive areas of the steel box girder that are subjected to repeated loads (such as the weld seam in the wheel track area of ​​the top plate), the residual stress is treated by vibration-impact composite treatment technology to improve the fatigue resistance of the weld seam.

[0039] When using vibration-impact composite treatment technology, the vibrator frequency is reduced to 50-100Hz, putting the steel box girder in a state of micro-vibration, where the internal stress of the material is relatively relaxed. Then, an ultrasonic impact head (frequency 20kHz) is used to scan and impact along the weld. The high-frequency impact energy generated by the ultrasonic impact further refines the grains in the weld area, introducing a compressive stress layer with a depth of 1-2mm on the surface, significantly improving the fatigue resistance of the weld.

[0040] This embodiment constructs a closed-loop control system based on real-time stress feedback and adaptive adjustment mechanism by monitoring stress changes during the vibration aging process of the steel box girder in real time. The vibration parameters are automatically adjusted according to the actual stress changes of the steel box girder to ensure that the vibration aging is always in the optimal state, thereby improving the stability and reliability of the aging effect. This avoids fluctuations in the aging effect caused by insufficient human experience or unreasonable parameter settings, making the aging effect more stable and reliable, and significantly improving the consistency of product quality.

[0041] It should be understood that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0042] Example 3 This embodiment is used to implement the principle of the above method embodiment to construct a zoned adaptive vibration aging control system for residual stress of steel box girders, including a stress analysis submodule, a stress zoning submodule, a vibration source arrangement submodule, a stress acquisition submodule, a stress elimination submodule, and a residual stress elimination submodule.

[0043] The stress analysis submodule is used to detect and analyze residual stress in steel box girders using ultrasonic stress testing or numerical simulation based on finite element analysis. The stress zoning submodule is used to divide the steel box girder into horizontal zones based on residual stress according to the test results and draw a residual stress zoning map. The vibration source arrangement submodule is used to arrange multiple vibration sources in different stress regions according to the residual stress zoning map. The stress acquisition submodule is used to collect stress change data of key parts of the steel box girder in real time during the vibration aging process; The stress relief submodule is used to preset the stress relief threshold and perform conventional vibration aging treatment on the steel box girder to continuously relieve stress by adjusting the amplitude, frequency and vibration time of the vibration source in real time. The residual stress elimination submodule is used to eliminate residual stress in the critical fatigue-sensitive areas of steel box girders subjected to repeated loads by employing a vibration-impact composite treatment.

[0044] Each submodule is mainly used to implement the various steps of the method implementation, which will not be elaborated here.

[0045] It should be noted that, depending on the implementation needs, the various steps / components described in this application can be broken down into more steps / components, or two or more steps / components or parts of the operation of steps / components can be combined into new steps / components to achieve the purpose of this invention.

[0046] This embodiment also includes a processor, a communication interface, a memory, and a communication bus; wherein the processor, the communication interface, and the memory communicate with each other through the communication bus; the memory stores a computer program, which, when executed by the processor, causes the processor to perform the steps of the zonal adaptive vibration aging control method for residual stress in steel box girders.

[0047] This embodiment also provides a computer-readable storage medium storing executable instructions that, when executed by a processor, enable the processor to implement a zoned adaptive vibration aging control method for residual stress in steel box girders.

[0048] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects.

[0049] Furthermore, this application may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0050] This application is described with reference to the flowchart of the method and computer program product according to Embodiment 1 and the block diagram of the device (system) according to Embodiment 3. It should be understood that each step or block in the flowchart or block diagram, as well as combinations of steps or blocks in the flowchart or block diagram, can be implemented by computer program instructions.

[0051] These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing device to produce a machine, such that the instructions, which are executable by the processor of the computer or other programmable data processing device, produce instructions for implementing the process. Figure 1 One or more processes or boxes Figure 1 A zoned adaptive vibration aging control system for residual stress in steel box girders, specifying functions within one or more boxes.

[0052] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes or boxes Figure 1 The function specified in one or more boxes.

[0053] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes or boxes Figure 1 The steps of the zonal adaptive vibration aging control method for residual stress in steel box girders specified in one or more boxes.

[0054] The above embodiments are only used to illustrate the design concept and features of the present invention, and their purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. The protection scope of the present invention is not limited to the above embodiments. Therefore, all equivalent changes or modifications made based on the principles and design ideas disclosed in the present invention are within the protection scope of the present invention.

Claims

1. A zoned adaptive vibration aging control method for residual stress in steel box girders, characterized in that: Includes the following steps: S1: Residual stress detection and analysis of steel box girders are performed using ultrasonic stress testing or numerical simulation based on finite element analysis. S2: Based on the test results, the steel box girder is divided into zones according to the residual stress level, and a residual stress zoning map is drawn; S3: Arrange multiple vibration sources in different stress regions according to the residual stress zoning map; S4: Real-time acquisition of stress change data of key parts of steel box girder during vibration aging process; S5: Preset stress relief threshold, and continuously relieve stress by adjusting the amplitude, frequency and vibration time of the vibration source in real time to perform conventional vibration aging treatment on the steel box girder; S6: For the critical fatigue-sensitive areas of the steel box girder subjected to repeated loads, a vibration-impact composite treatment is adopted to eliminate residual stress.

2. The method for zoned adaptive vibration aging control of residual stress in steel box girders according to claim 1, characterized in that: In step S2, the steel box girder is divided into high-stress zone, medium-stress zone and low-stress zone. High-stress areas include the area of ​​the full penetration weld between the top plate and the longitudinal ribs, and the connection between the transverse diaphragm and the web. The medium stress zone includes the web butt weld and some secondary stiffening rib welds; Low-stress areas include non-critical load-bearing panel areas.

3. The zonal adaptive vibration aging control method for residual stress in steel box girders according to claim 2, characterized in that: In step S3, the medium stress zone and the low stress zone are compared. The vibrators arranged in the high stress zone are more numerous and have higher power.

4. The zonal adaptive vibration aging control method for residual stress in steel box girders according to claim 2, characterized in that: In step S3, when setting the vibrator parameters, High-frequency, high-amplitude vibration parameters are set in the high-stress zone. Through high-frequency, high-amplitude vibration, the material in this zone undergoes sufficient plastic deformation, effectively releasing residual stress. In the medium stress region, medium frequency and medium amplitude parameters are used to achieve effective stress relief with appropriate energy input; Low-frequency, low-amplitude parameters are used in low-stress areas to avoid excessive vibration from causing unnecessary damage to the structure.

5. The method for zoned adaptive vibration aging control of residual stress in steel box girders according to claim 1, characterized in that: In step S3, the vibrator is arranged using digital twin-driven virtual debugging technology. The specific steps are as follows: S31: Based on the BIM model of the steel box girder, a digital twin model of the steel box girder vibration aging is constructed by combining material properties and welding process parameters to simulate the stress change and vibration response of the steel box girder under different vibration parameters; S32: In a virtual environment, simulate and test different numbers of vibration points, vibration point locations, and parameter combinations, analyze the simulation results, and output the optimal vibration aging scheme for a specific steel box girder structure.

6. The method for zoned adaptive vibration aging control of residual stress in steel box girders according to claim 1, characterized in that: In step S4, fiber optic stress sensors are implanted in key parts of the steel box girder to collect stress change data.

7. The method for zoned adaptive vibration aging control of residual stress in steel box girders according to claim 1, characterized in that: The specific steps in step S5 are as follows: When the stress in a certain area drops below the stress relief threshold, the amplitude of the vibration source in that area is reduced. If the stress in the area decreases slowly within a preset time and the decrease is less than a preset percentage, then the frequency of the vibration source should be increased or the vibration time extended.

8. The method for zoned adaptive vibration aging control of residual stress in steel box girders according to claim 1, characterized in that: The specific steps in step S6 are as follows: When using vibration-impact composite treatment, the frequency of the vibration source is reduced to a preset range, so that the steel box girder is in a state of micro-vibration, at which time the internal stress of the material is in a relatively relaxed state. Scanning impacts are performed along the critical fatigue-sensitive area to refine the grains in the critical fatigue-sensitive area with high-frequency impact energy, and a compressive stress layer is introduced on the surface to improve the fatigue resistance of the critical fatigue-sensitive area.

9. A zoned adaptive vibration aging control system for residual stress in steel box girders, characterized in that: The stress analysis submodule is used to detect and analyze residual stress in steel box girders using ultrasonic stress testing or numerical simulation based on finite element analysis. The stress zoning submodule is used to divide the steel box girder into horizontal zones based on residual stress according to the test results and draw a residual stress zoning map. The vibration source arrangement submodule is used to arrange multiple vibration sources in different stress regions according to the residual stress zoning map. The stress acquisition submodule is used to collect stress change data of key parts of the steel box girder in real time during the vibration aging process; The stress relief submodule is used to preset the stress relief threshold and perform conventional vibration aging treatment on the steel box girder to continuously relieve stress by adjusting the amplitude, frequency and vibration time of the vibration source in real time. The residual stress elimination submodule is used to eliminate residual stress in the critical fatigue-sensitive areas of steel box girders subjected to repeated loads by employing a vibration-impact composite treatment.

10. A computer memory, characterized in that: It contains a computer program that can be executed by a computer processor, which performs the partitioned adaptive vibration aging control method for residual stress of steel box girders as described in any one of claims 1 to 8.

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