Semi-submersible barge loading hull structure safety monitoring and early warning method and system

Abstract

The invention relates to the technical field of ships, in particular to a semi-submersible barge loading hull structure safety monitoring and early warning method and system, and the method comprises the following steps: obtaining four-point plane torsion degrees of a semi-submersible barge loading hull; calculating the maximum allowable value of the four-point plane torsion resistance according to the four-point plane torsion resistance; the maximum allowable value of the four-point plane torsion resistance is compared with an early warning threshold value, the early warning level of the four-point plane torsion resistance is obtained, and the early warning level reflects the safety level. According to the method, an objective quantification method is provided for the stress and deformation conditions of the semi-submersible barge loading ship body in the loading process of the semi-submersible barge, and judgment on the safety risk level of the semi-submersible barge loading ship body structure is provided according to the quantification result.

Description

Technical Field

[0001] The present invention relates to the field of ship technology, and in particular to a monitoring and early warning method and system for the safety of a semi-submersible barge loading hull structure. Background Art

[0002] At present, during the loading process of a semi-submersible barge, the transport equipment is arranged on the semi-submersible barge in the form of multi-point support. Factors such as asynchronous operation of the equipment, uneven ground, and time required for the hydraulic system to adapt to deformation will cause changes in the stress and posture of the semi-submersible barge structure, ultimately causing the risk of damage to the semi-submersible barge hull structure. Hull structure damage has an adverse effect on the semi-submersible barge, which in turn affects the safety and performance of the semi-submersible barge structure.

[0003] At present, the construction control of semi-submersible barge loading generally takes the ship's draft, load, and ballast tank water volume as key control parameters. Although the ship's draft, load, and ballast tank water volume can indirectly reflect the stress and deformation of the semi-submersible barge, they cannot directly and effectively guide the rapid decision-making of process adjustment when an early warning occurs, affecting the construction progress. The core issue of the safety of the semi-submersible barge loading hull structure is the structural stress and deformation problem. Controlling the influence of stress on the semi-submersible barge hull is the key to the safety of the semi-submersible barge loading hull structure. Summary of the invention

[0004] The purpose of the present invention is to provide a monitoring and early warning method and system for the safety of the hull structure of a semi-submersible barge, to achieve the evaluation of the safety risk level of the hull structure of the semi-submersible barge, and to provide decision support for rapid process adjustment, thereby solving the problem that the hull structure of the semi-submersible barge may be damaged during the loading process.

[0005] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions: A monitoring and early warning method for the safety of a semi-submersible barge loading hull structure comprises the following steps: The method for obtaining the four-point plane distortion of the semi-submersible barge loading hull comprises: obtaining the initial elevation values ​​of the four corner points before the transport equipment advances to the semi-submersible barge; obtaining the semi-submersible barge elevation values ​​of the four corner points after the transport equipment advances to the semi-submersible barge; calculating the absolute value of the difference between the semi-submersible barge elevation value and the initial elevation value of the four corner points , , , ; The distortion of the four-point plane is ; Calculate the maximum allowable value of the four-point plane distortion according to the four-point plane distortion; The maximum permissible value of the four-point plane distortion is compared with the warning threshold to obtain the warning level of the four-point plane distortion, and the warning level reflects the safety level.

[0006] As a preferred solution, the method further includes multiplying the maximum allowable value of the four-point plane distortion by a first reduction coefficient and then comparing the result with the warning threshold to determine the warning level of the four-point plane distortion.

[0007] As a preferred solution, the value range of the first reduction coefficient is 0-1.

[0008] As a preferred solution, it also includes obtaining a structural stress warning level according to the structural stress, wherein the structural stress includes a stress value of a supporting deck structure of the transport equipment.

[0009] As a preferred solution, the initial stress value of the supporting deck structure of the transport equipment in the initial state of the semi-submersible barge is calculated by a finite element model, and the stress value of the supporting deck structure of the transport equipment after the transport equipment moves forward to the semi-submersible barge is subtracted from the initial stress value to obtain the maximum allowable change value of the supporting deck structure; the structural stress warning level is obtained according to the maximum allowable change value of the supporting deck structure.

[0010] As a preferred solution, the structural stress warning level is determined by multiplying the maximum allowable change value of the supporting deck structure by a second reduction coefficient.

[0011] As a preferred solution, the value range of the second reduction coefficient is 0-1.

[0012] As a preferred solution, if the warning level of the four-point plane distortion is a first-level warning or the structural stress warning level is a first-level warning, the monitoring result is a first-level warning; if the warning level of the four-point plane distortion is a second-level warning or the structural stress warning level is a second-level warning, the monitoring result is a second-level warning; if the warning level of the four-point plane distortion is a third-level warning or the structural stress warning level is a third-level warning, the monitoring result is a third-level warning.

[0013] As a preferred option, it also includes making corresponding process adjustment measures based on the monitoring results, including: during the first-level warning, the structural safety of the semi-submersible barge hull is at a medium-risk level, and attention is paid to the changes in the four-point plane distortion or structural stress, and no adjustment is made; during the second-level warning, the structural safety of the semi-submersible barge hull is at a high-risk level, the operating speed of the transportation equipment is slowed down, and the process is dynamically adjusted according to the four-point elevation values ​​and the four-point plane distortion values; during the third-level warning, the structural safety of the semi-submersible barge hull is at an extremely high-risk level, the operation of the transportation equipment is stopped, and the process is adjusted according to the four-point elevation values ​​and the four-point plane distortion values ​​until the structural safety level drops below the medium-risk level.

[0014] Based on the same concept, a monitoring and early warning system for the safety of the semi-submersible barge loading hull structure is also proposed, including a displacement sensor, a collector and a processor; The displacement sensor is used to obtain the initial elevation value of the four corner points of the semi-submersible barge loading hull and the semi-submersible barge elevation value. The initial elevation value is the elevation value of the four corner points before the transport equipment advances to the semi-submersible barge, and the semi-submersible barge elevation value is the elevation value of the four corner points after the transport equipment advances to the semi-submersible barge; The collector is used to input the initial elevation values ​​of the four corner points and the elevation values ​​of the semi-submersible barge into the processor, The processor calculates the four-point plane distortion of the semi-submersible barge loading hull. The method for obtaining the four-point plane distortion of the semi-submersible barge loading hull includes sequentially calculating the absolute value of the difference between the semi-submersible barge elevation value and the initial elevation value at the four corner points , , , ; The distortion of the four-point plane is The processor is also used to compare the maximum allowable value of the four-point plane distortion calculated based on the four-point plane distortion with the warning threshold, obtain and output the warning level of the four-point plane distortion, and the warning level reflects the safety level.

[0015] Compared with the prior art, the present invention has the following beneficial effects: the method of the present invention provides an objective quantitative method for the stress and deformation of the semi-submersible barge loaded hull during the loading process, and provides an evaluation of the safety risk level of the semi-submersible barge loaded hull structure based on the quantitative results. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the semi-submersible barge hull structure; Figure 2 This is a schematic diagram of the four-point plane distortion of a semi-submersible barge; Figure 3 This is a schematic diagram of the SPMT vehicle transporting a wind power platform; Figure 4 This is a schematic diagram of the safety monitoring and early warning system for the semi-submersible barge loading hull structure; Figure 5 This is a schematic diagram of the installation of a static level; Figure 6 This is a schematic diagram of the stress sensor installation. DETAILED DESCRIPTION

[0017] The present invention is further described in detail below in conjunction with test examples and specific implementation methods. However, this should not be understood as the scope of the above subject matter of the present invention being limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0018] Example 1 A monitoring and early warning method for the safety of a semi-submersible barge loading hull structure comprises the following steps: The method for obtaining the four-point plane distortion of the semi-submersible barge loading hull comprises: obtaining the initial elevation values ​​of the four corner points before the transport equipment advances to the semi-submersible barge; obtaining the semi-submersible barge elevation values ​​of the four corner points after the transport equipment advances to the semi-submersible barge; and calculating the absolute values ​​of the differences between the semi-submersible barge elevation values ​​and the initial elevation values ​​of the four corner points in sequence. , , , ; The distortion of the four-point plane is ; Calculate the maximum allowable value of the four-point plane distortion according to the four-point plane distortion; The maximum permissible value of the four-point plane distortion is compared with the warning threshold to obtain the warning level of the four-point plane distortion, and the warning level reflects the safety level.

[0019] Furthermore, the maximum allowable value of the four-point plane distortion calculated based on the four-point plane distortion is calculated using the finite element analysis method based on the four-point plane distortion and current standards of classification societies.

[0020] Furthermore, the method further includes multiplying the maximum allowable value of the four-point plane distortion by a first reduction coefficient and then comparing the result with the warning threshold to determine the warning level of the four-point plane distortion.

[0021] Furthermore, the value range of the first reduction coefficient is 0 to 1. As a preferred solution, the value range of the first reduction coefficient includes 0.5, 0.7, and 0.9.

[0022] Furthermore, the warning level of the four-point plane distortion is divided into three levels. The warning threshold corresponding to the first-level warning is 25 mm; the warning threshold corresponding to the second-level warning is 35 mm; and the warning threshold corresponding to the third-level warning is 45 mm.

[0023] Furthermore, it also includes obtaining a structural stress warning level according to the structural stress, wherein the structural stress includes a stress value of a supporting deck structure of the transport equipment.

[0024] Furthermore, the initial stress value of the supporting deck structure of the transport equipment in the initial state of the semi-submersible barge is calculated by the finite element model, and the stress value of the supporting deck structure of the transport equipment after the transport equipment moves forward to the semi-submersible barge is subtracted from the initial stress value to obtain the maximum allowable change value of the supporting deck structure; and the structural stress warning level is obtained according to the maximum allowable change value of the supporting deck structure.

[0025] Furthermore, the structural stress warning level is divided into three levels. The warning threshold corresponding to the first-level warning is 179.2MPa; the warning threshold corresponding to the second-level warning is 204.8MPa; and the warning threshold corresponding to the third-level warning is 230.4MPa.

[0026] Furthermore, the structural stress warning level is determined by multiplying the maximum allowable change value of the supporting deck structure by the second reduction coefficient.

[0027] Furthermore, the value range of the second reduction coefficient is 0 to 1, and the value range of the second reduction coefficient includes 0.5, 0.7, and 0.9.

[0028] Furthermore, if the warning level of the four-point plane distortion is a first-level warning or the structural stress warning level is a first-level warning, the monitoring result is a first-level warning; if the warning level of the four-point plane distortion is a second-level warning or the structural stress warning level is a second-level warning, the monitoring result is a second-level warning; if the warning level of the four-point plane distortion is a third-level warning or the structural stress warning level is a third-level warning, the monitoring result is a third-level warning.

[0029] Furthermore, it also includes making corresponding process adjustment measures according to the monitoring results, including: during the first-level warning, the structural safety of the semi-submersible barge hull is at a medium-risk level, pay attention to the changes in the four-point plane distortion or structural stress, and do not make adjustments; during the second-level warning, the structural safety of the semi-submersible barge hull is at a high-risk level, slow down the operating speed of the transportation equipment, and dynamically adjust the process according to the four-point elevation values ​​and the four-point plane distortion values; during the third-level warning, the structural safety of the semi-submersible barge hull is at an extremely high-risk level, stop the operation of the transportation equipment, and adjust the process according to the four-point elevation values ​​and the four-point plane distortion values ​​until the structural safety level drops below the medium-risk level.

[0030] On the other hand, a monitoring and early warning system for the structural safety of a semi-submersible barge loading hull is also proposed, comprising a displacement sensor, a collector and a processor; the displacement sensor is used to obtain the initial elevation values ​​of the four corner points of the semi-submersible barge loading hull and the semi-submersible barge elevation values, the initial elevation values ​​are the elevation values ​​of the four corner points before the transport equipment advances to the semi-submersible barge, and the semi-submersible barge elevation values ​​are the elevation values ​​of the four corner points after the transport equipment advances to the semi-submersible barge; The collector is used to input the initial elevation values ​​of the four corner points and the elevation values ​​of the semi-submersible barge into the processor, The processor calculates the four-point plane distortion of the semi-submersible barge loading hull. The method for obtaining the four-point plane distortion of the semi-submersible barge loading hull includes sequentially calculating the absolute value of the difference between the semi-submersible barge elevation value and the initial elevation value at the four corner points , , , ; The distortion of the four-point plane is The processor is also used to calculate the maximum allowable value of the four-point plane distortion based on the four-point plane distortion; compare the maximum allowable value of the four-point plane distortion with the warning threshold, obtain and output the warning level of the four-point plane distortion, and the warning level reflects the safety level.

[0031] The displacement sensor adopts a static level, which is arranged at the four corner points of the semi-submersible barge hull.

[0032] It also includes a stress sensor, which is installed at each supporting top deck of the semi-submersible barge and arranged along the longitudinal direction of the semi-submersible barge to obtain the stress value of the supporting deck structure of the transportation equipment.

[0033] The present invention provides a monitoring and early warning method and system for the safety of a semi-submersible barge loading hull structure, which solves safety problems such as overloading, uneven load distribution, and excessive local load causing damage to the hull structure during the loading process of the semi-submersible barge. The method and system of the present invention are combined with the analysis of the stress characteristics of semi-submersible barge loading, and propose a three-level early warning mechanism and early warning value setting method for the safety of the semi-submersible barge loading hull structure, so as to evaluate the safety risk level of the semi-submersible barge loading hull structure, provide decision support for rapid process adjustment, and fill in the gaps. The method of the present invention can provide timely early warning before an accident occurs, and provide decision support for process adjustment for engineering personnel, eliminate safety hazards, and prevent accidents.

[0034] Example 2 This embodiment provides a monitoring and early warning method for safety control of a semi-submersible barge loading hull structure.

[0035] Place the cargo to be loaded on the transport equipment, but do not proceed to the semi-submersible barge. Figure 1 As shown in the figure, the state of the semi-submersible barge at this time is taken as the initial state. In the initial state, the elevations of the four corner points of the semi-submersible barge are 0, and the plane formed by the four corner points is called the four-point plane. The elevations of the four corner points are set at the four intersections. During the loading process of the semi-submersible barge, the elevations of the four corner points will change. At this time, the spatial relationship of the four corner points can be divided into two situations: first, any three points form a plane, and the remaining point is also in the plane; second, any three points form a plane, and the remaining point is not in the plane, such as Figure 2 When the spatial relationship of the four corner points is the second case, the semi-submersible barge will produce torsion, which is not conducive to the safety of the semi-submersible barge. Therefore, torsion is regarded as the key parameter for the safety control of the semi-submersible barge loading hull structure. Here, the four-point plane distortion is introduced to characterize the torsion of the semi-submersible barge.

[0036] The four-point plane distortion calculation method is the absolute value of the difference between the elevations of two sets of diagonal corner points. Take the example of a SPMT transporting a wind turbine platform to a semi-submersible barge. Figure 3As shown, the elevations of the four corner points 1, 2, 3, and 4 of the semi-submersible barge are , , , , then the distortion of the four-point plane is .

[0037] The advantage of using the four-point plane distortion as a key parameter for the safety control of the semi-submersible barge loading hull structure is that it can guide the rapid adjustment of the on-site process. The adjustment idea is: lower the highest corner point or raise the lowest corner point through the process, and the elevation adjustment amount is the value of the four-point plane distortion. Taking the SPMT vehicle transporting the wind power platform as an example, assuming that the elevations of the four corner points 1, 2, 3, and 4 are 30mm, -15mm, 20mm, and 10mm respectively, the four-point plane distortion is 55mm, lowering corner point 1 or raising corner point 2, and the adjustment amount is 55mm.

[0038] Structural stress can directly reflect the stress condition of the semi-submersible barge hull structure, so structural stress is used as another key parameter for the safety control of the semi-submersible barge loading hull structure. Semi-submersible barges have negative bending moments at the transport equipment support deck, so the deck structure at the support is used as the key test section for structural stress control. The risk of damage to the hull structure at the support is relatively large, especially near the midship, which is the most risky, so it is used as a key test point for structural stress control.

[0039] The finite element model of semi-submersible barge loading is established, the influence of four-point plane distortion on the stress of semi-submersible barge is analyzed, and the maximum allowable value of four-point plane distortion is calculated according to the current classification society standards for the stress of semi-submersible barge hull components. If it is assumed that the allowable stress of the semi-submersible barge hull deck is 236MPa and the corresponding four-point plane distortion is 50mm, then 50mm is used as the control value of the four-point plane distortion.

[0040] The structural stress value at the location where the stress sensor is arranged in the initial state of the semi-submersible barge is calculated by the finite element model, and the maximum allowable change of the structural stress relative to the initial state is used as the control value of the structural stress. Assuming that the maximum stress of all measuring points in the initial state is -20MPa, the structural stress control value is 256MPa.

[0041] According to the control value, three-level warning values ​​are set for the four-point plane distortion and structural stress of the semi-submersible barge. Considering a certain safety reserve when warning, the three-level reduction coefficients of the four-point plane distortion can be set to 0.5, 0.7, and 0.9 respectively. The warning values ​​of level I, level II, and level III of the four-point plane distortion are 25mm, 35mm, and 45mm respectively; the structural stress reduction coefficient can be set to 0.7, 0.8, and 0.9 respectively. The warning values ​​of level I, level II, and level III of the structural stress are 179.2MPa, 204.8MPa, and 230.4MPa respectively.

[0042] According to the monitoring values ​​of the four-point plane distortion and structural stress of the semi-submersible barge, a three-level early warning mechanism for the structural safety of the semi-submersible barge loading hull is determined: a Level I warning is given if any monitoring value of the four-point plane distortion or structural stress exceeds their respective Level I warning values; a Level II warning is given if any monitoring value of the four-point plane distortion or structural stress exceeds their respective Level II warning values; a Level III warning is given if any monitoring value of the four-point plane distortion or structural stress exceeds their respective Level III warning values.

[0043] According to the warning level, determine the risk level of the semi-submersible barge loading hull structural safety, and make corresponding process adjustment measures according to the structural safety risk level. When there is no warning, the semi-submersible barge hull structural safety is at a low risk level, and no adjustment is made; when the warning level is level I, the semi-submersible barge hull structural safety is at a medium risk level, pay attention to the changes in the four-point plane distortion or structural stress, and no adjustment is made; when the warning level is level II, the semi-submersible barge hull structural safety is at a high risk level, slow down the operation speed of the transport equipment, and guide the dynamic adjustment of the process according to the four-point elevation value and the four-point plane distortion value; when the warning level is level III, the semi-submersible barge hull structural safety is at an extremely high risk level, stop the operation of the transport equipment, and guide the adjustment of the process according to the four-point elevation value and the four-point plane distortion value until the structural safety level drops below the medium level, and then the transport equipment can be started to continue to move forward. Taking the SPMT vehicle transporting wind power platform as an example, assuming that the elevations of the four corner points 1, 2, 3, and 4 are 15mm, -10mm, 30mm, and 15mm respectively, and the four-point plane distortion is 40mm, which exceeds the Level II warning value. Assuming that the structural stress increment is 200MPa at this time, which exceeds the Level I warning, the warning level is Level II warning, and the safety of the semi-submersible barge structure is at a high risk level. The process is dynamically adjusted: by reducing the oil pressure in areas B2 and D2 to lower corner point 3 or increasing the oil pressure in areas B1 and D1 to increase corner point 2, the adjustment amount is ≤40mm.

[0044] Example 3 This embodiment provides a monitoring and early warning system for the safety control of the semi-submersible barge loading hull structure, such as Figure 4 As shown, it includes a sensor, a collector, an information transmission device, a host computer system, data processing software, an audible and visual alarm device, a mobile power supply, and a process adjustment instruction. The sensor is communicatively connected to the collector, the host computer system is connected to the collector through the information transmission device, and the audible and visual alarm device is communicatively connected to the host computer system.

[0045] The sensor includes a displacement sensor and a stress sensor. The displacement sensor adopts a static level 3, which is arranged at the four corners of the semi-submersible barge 1. A static level support 6 is installed on the end deck of the semi-submersible barge 1, and the static level 3 is installed on the support 6. Figure 5 The stress sensor 2 is installed on each supporting top deck of the semi-submersible barge 1 and arranged along the longitudinal direction of the semi-submersible barge, as shown in FIG. Figure 6shown.

[0046] The data processing software of the monitoring and early warning system for the safety control of the semi-submersible barge loading hull structure has the function of real-time calculation of the distortion of the four-point plane. It is installed on the host computer system. The process adjustment instructions can provide decision support for different adjustment measures for the process according to the safety risk level of the semi-submersible barge loading hull structure, which can be displayed on the host computer system.

[0047] The sound and light alarm device of the monitoring and early warning system for the safety control of the semi-submersible barge loading hull structure can distinguish alarms of different risk levels for the semi-submersible barge structure safety, and has a corresponding relationship with the process adjustment instructions.

[0048] The mobile power supply supplies power to the collector and the information transmission device.

[0049] The present invention provides a monitoring and early warning method and system for the safety of a semi-submersible barge loading hull structure, which solves safety problems such as overloading, uneven load distribution, and excessive local load causing damage to the hull structure during the loading process of the semi-submersible barge. The method and system of the present invention are combined with the analysis of the stress characteristics of semi-submersible barge loading, and propose a three-level early warning mechanism and early warning value setting method for the safety of the semi-submersible barge loading hull structure, so as to evaluate the safety risk level of the semi-submersible barge loading hull structure, provide decision support for rapid process adjustment, and fill in the gaps. The method of the present invention can provide timely early warning before an accident occurs, and provide decision support for process adjustment for engineering personnel, eliminate safety hazards, and prevent accidents.

[0050] The above description is only a preferred embodiment of the present invention. It should be pointed out that those skilled in the art can make improvements without departing from the principle of the present invention, and the improvements should also be regarded as protection of the present invention.

Claims

1. A monitoring and early warning method for the safety of a semi-submersible barge loading hull structure, characterized in that: The following steps are involved: The method for obtaining the four-point plane distortion of the semi-submersible barge loading hull comprises: obtaining the initial elevation values ​​of the four corner points before the transport equipment advances to the semi-submersible barge; obtaining the semi-submersible barge elevation values ​​of the four corner points after the transport equipment advances to the semi-submersible barge; calculating the absolute value of the difference between the semi-submersible barge elevation value and the initial elevation value of the four corner points , , , ; The distortion of the four-point plane is ; Calculate the maximum allowable value of the four-point plane distortion according to the four-point plane distortion; The maximum permissible value of the four-point plane distortion is compared with the warning threshold to obtain the warning level of the four-point plane distortion, and the warning level reflects the safety level.

2. A method for monitoring and early warning the safety of a semi-submersible barge loading hull structure as claimed in claim 1, characterized in that: The method also includes multiplying the maximum allowable value of the four-point plane distortion by a first reduction coefficient and then comparing the result with the warning threshold to determine the warning level of the four-point plane distortion.

3. A method for monitoring and early warning of the safety of a semi-submersible barge loading hull structure as claimed in claim 2, characterized in that: The value range of the first reduction coefficient is 0-1.

4. A method for monitoring and early warning of the safety of a semi-submersible barge loading hull structure as claimed in any one of claims 1 to 3, characterized in that: It also includes obtaining a structural stress warning level according to the structural stress, wherein the structural stress includes a stress value of a transport equipment supporting deck structure.

5. A method for monitoring and early warning of the safety of a semi-submersible barge loading hull structure as claimed in claim 4, characterized in that: The initial force value of the supporting deck structure of the transport equipment in the initial state of the semi-submersible barge is calculated by the finite element model, and the force value of the supporting deck structure of the transport equipment after the transport equipment moves forward to the semi-submersible barge is subtracted from the initial force value to obtain the maximum allowable change value of the supporting deck structure; The structural stress warning level is obtained based on the maximum allowable change of the supporting deck structure.

6. A method for monitoring and early warning the safety of a semi-submersible barge loading hull structure as claimed in claim 5, characterized in that: The structural stress warning level is determined by multiplying the maximum allowable change value of the supporting deck structure by the second reduction coefficient.

7. A method for monitoring and early warning the safety of a semi-submersible barge loading hull structure as claimed in claim 6, characterized in that: The value range of the second reduction coefficient is 0-1.

8. A method for monitoring and early warning the safety of a semi-submersible barge loading hull structure as claimed in claim 7, characterized in that: If the warning level of the four-point plane distortion is a first-level warning or the structural stress warning level is a first-level warning, the monitoring result is a first-level warning; if the warning level of the four-point plane distortion is a second-level warning or the structural stress warning level is a second-level warning, the monitoring result is a second-level warning; If the warning level of the four-point plane distortion is level three warning or the structural stress warning level is level three warning, the monitoring result is level three warning.

9. A method for monitoring and early warning of the safety of a semi-submersible barge loading hull structure as claimed in claim 8, characterized in that: It also includes making corresponding process adjustment measures based on the monitoring results, including: during the first-level warning, the structural safety of the semi-submersible barge hull is at a medium-risk level, pay attention to the changes in the four-point plane distortion or structural stress, and do not make adjustments; during the second-level warning, the structural safety of the semi-submersible barge hull is at a high-risk level, slow down the operating speed of the transportation equipment, and dynamically adjust the process according to the four-point elevation values ​​and the four-point plane distortion values; during the third-level warning, the structural safety of the semi-submersible barge hull is at an extremely high-risk level, stop the operation of the transportation equipment, and adjust the process according to the four-point elevation values ​​and the four-point plane distortion values ​​until the structural safety level drops below the medium-risk level.

10. A monitoring and early warning system for the safety of a semi-submersible barge loading hull structure, characterized in that: It includes a displacement sensor, a collector and a processor; The displacement sensor is used to obtain the initial elevation value of the four corner points of the semi-submersible barge loading hull and the semi-submersible barge elevation value. The initial elevation value is the elevation value of the four corner points before the transport equipment advances to the semi-submersible barge, and the semi-submersible barge elevation value is the elevation value of the four corner points after the transport equipment advances to the semi-submersible barge; The collector is used to input the initial elevation values ​​of the four corner points and the elevation values ​​of the semi-submersible barge into the processor, The processor calculates the four-point plane distortion of the semi-submersible barge loading hull. The method for obtaining the four-point plane distortion of the semi-submersible barge loading hull includes sequentially calculating the absolute value of the difference between the semi-submersible barge elevation value and the initial elevation value at the four corner points , , , ; The four-point plane distortion is The processor is also used to compare the maximum allowable value of the four-point plane distortion calculated based on the four-point plane distortion with the warning threshold, obtain and output the warning level of the four-point plane distortion, and the warning level reflects the safety level.

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