A risk assessment method based on offshore construction

Abstract

The present invention relates to the field of offshore risk assessment, and in particular to a risk assessment method based on offshore construction. The present invention constructs a three-dimensional model of an object to be hoisted based on point cloud data, constructs a reference surface based on the wind direction of the current sea breeze, determines the difference in symmetrical morphological features of the three-dimensional model corresponding to the object to be hoisted in different postures relative to the reference surface, determines the optimal hoisting posture of the object to be hoisted based on the difference in symmetrical morphological features, fixes the object to be hoisted in the optimal hoisting posture for hoisting, calculates a windward force difference characterization coefficient for the object to be hoisted based on the difference in symmetrical morphological features and size features corresponding to the three-dimensional model in the optimal hoisting posture and in combination with the current sea breeze speed, predicts whether the object to be hoisted meets the windward force difference standard during the hoisting process based on the windward force difference characterization coefficient, makes a risk judgment on the object to be hoisted, generates a recommended hoisting speed, and improves the safety of offshore construction and the accuracy of risk assessment.

Description

Technical Field

[0001] The present invention relates to the field of offshore risk assessment, and in particular to a risk assessment method based on offshore construction. Background Art

[0002] Offshore construction risk assessment is a complex process involving many factors, including the implementation of production safety responsibilities, construction safety management, risk identification and prevention, etc. With the rapid development of offshore wind power and other projects, construction units need to establish a sound safety evaluation system while ensuring equipment maintenance, personnel training and emergency plans are in place to cope with challenges such as severe weather, complex geology and high technical requirements in the offshore environment, and to ensure construction safety and project quality.

[0003] China Patent Application Publication No.: CN117350531A, discloses a risk assessment method and device for offshore wind power pile foundation construction, by establishing a risk assessment index system; by constructing a cloud model, a relative importance scale of the cloud model is established for the expert group to establish a comparative judgment matrix, and the judgment matrix of the expert group is integrated to obtain a subjective weight cloud model; data is collected according to the risk assessment index system, and the objective weight of the index is comprehensively measured for the collected data to generate an objective weight cloud model of the index; based on the subjective-objective weight cloud model, a subjective-objective variable weight cloud model of the index is generated to establish a pile foundation construction risk state cloud model, and to formulate risk prevention, control and recovery strategies. The present invention fully considers the uncertainty in the assessment process by establishing a construction risk assessment index system, solves the contradiction of the existing method in accurately modeling fuzzy concepts, optimizes the weight distribution, and obtains a more scientific and reasonable assessment result.

[0004] However, there are still the following problems in the prior art:

[0005] Strong winds at sea are an important factor affecting the risks of offshore construction, especially for the hoisting process of the objects to be hoisted. In actual situations, during the hoisting process of the objects to be hoisted, due to the differences in the shapes of the objects, they will swing irregularly due to the force differences under the influence of strong winds, which will lead to reduced hoisting efficiency, increased risks of offshore construction, and increased difficulty in risk prediction. Summary of the invention

[0006] To this end, the present invention provides a risk assessment method based on offshore construction to solve the problem that in actual situations, due to the differences in the shapes of the objects to be hoisted, they will swing irregularly due to the force differences under the influence of strong winds, thereby reducing the hoisting efficiency, increasing the risk of offshore construction, and increasing the difficulty of risk prediction.

[0007] To achieve the above object, the present invention provides a risk assessment method based on offshore construction, which comprises:

[0008] Step S1, obtaining point cloud data of the object to be hoisted and the wind direction and wind speed of the current sea breeze, and constructing a three-dimensional model of the object to be hoisted based on the point cloud data;

[0009] Step S2, constructing a reference surface of the sea breeze direction based on the current sea breeze direction, determining the difference in symmetrical morphological features of the three-dimensional model corresponding to the object to be hoisted in different postures relative to the reference surface, and determining the optimal hoisting posture of the object to be hoisted based on the difference in symmetrical morphological features;

[0010] Step S3, fixing the object to be hoisted in an optimal hoisting posture for hoisting, and calculating the windward force difference characterization coefficient for the object to be hoisted based on the symmetrical morphological feature difference and size feature corresponding to the three-dimensional model under the optimal hoisting posture and the current sea breeze speed;

[0011] Step S4, predicting whether the object to be hoisted meets the windward force difference standard during the hoisting process based on the windward force difference characterization coefficient;

[0012] Step S5, in response to the prediction result, a risk assessment is performed on the object to be hoisted, including:

[0013] The wind direction change of the current sea breeze is obtained in real time, and the lifting risk abnormal value is calculated based on the corresponding windward force difference characterization coefficient of the object to be lifted after the wind direction changes and the current lifting speed. According to the lifting risk abnormal value, it is determined whether there is a lifting risk and a recommended lifting speed is generated.

[0014] Furthermore, the process of determining the difference in symmetric morphological features of the three-dimensional model corresponding to the object to be hoisted in different postures relative to the reference surface includes:

[0015] Constructing a reference surface perpendicular to the horizontal plane and passing through the center of gravity of the three-dimensional model according to the sea wind direction;

[0016] Constructing a rotation axis perpendicular to the horizontal plane through the center of gravity, rotating the three-dimensional model to change the posture, and calculating the difference in symmetrical morphological features on both sides of the reference plane when the three-dimensional model is in different postures;

[0017] The difference in symmetrical morphological features is the difference in surface area of ​​the three-dimensional models on both sides of the reference surface.

[0018] Furthermore, the process of determining the optimal lifting posture of the object to be lifted includes:

[0019] Determining the posture of the three-dimensional model at a minimum symmetrical morphological feature difference;

[0020] The posture is determined as the optimal lifting posture.

[0021] Further, the process of determining the dimensional characteristics includes,

[0022] Get the maximum horizontal length and maximum vertical height of the object to be hoisted;

[0023] Determine the product of the maximum horizontal length and the maximum vertical height of the object to be hoisted;

[0024] The product is determined as a size characteristic.

[0025] Furthermore, the windward force difference characterization coefficient for the object to be hoisted is calculated according to formula (1):

[0026]

[0027] In formula (1), A represents the coefficient of windward force difference characterization, Z represents the difference in symmetrical morphological characteristics, Z0 represents the difference in reference symmetrical morphological characteristics, C represents the size characteristic, C0 represents the reference size characteristic, F represents the current sea breeze speed, F0 represents the reference sea breeze speed, α represents the size characteristic weight coefficient, and β represents the current sea breeze speed weight coefficient.

[0028] Furthermore, based on the windward force difference characterization coefficient, it is predicted whether the object to be hoisted meets the windward force difference standard during the hoisting process, wherein:

[0029] If the windward force difference characterization coefficient is less than or equal to the reference windward force difference characterization coefficient, the object to be hoisted meets the windward force difference standard during the hoisting process;

[0030] If the windward force difference characterization coefficient is greater than the benchmark windward force difference characterization coefficient, the object to be hoisted does not meet the windward force difference standard during the hoisting process.

[0031] Further, it is determined whether the object to be hoisted responds to the prediction result, wherein:

[0032] If the object to be hoisted does not meet the windward force difference standard during the hoisting process, a response is made to the test result.

[0033] Furthermore, the abnormal value of the lifting risk is calculated according to formula (2):

[0034]

[0035] In formula (2), B represents the abnormal value of lifting risk, A represents the windward force difference characterization coefficient, A0 represents the benchmark windward force difference characterization coefficient, V represents the lifting speed, V0 represents the benchmark lifting speed, δ represents the weight coefficient of the windward force difference characterization coefficient, and ε represents the lifting speed weight coefficient.

[0036] Furthermore, the process of determining whether there is a lifting risk includes:

[0037] If the lifting risk abnormal value is greater than the predetermined lifting risk abnormal threshold, it is determined that there is a lifting risk;

[0038] If the lifting risk abnormal value is less than or equal to the predetermined lifting risk abnormal threshold, it is determined that there is no lifting risk.

[0039] Furthermore, a recommended hoisting speed is generated based on whether there is a hoisting risk, wherein:

[0040] If there is a lifting risk, a recommended lifting speed is generated, and the generated lifting speed is negatively correlated with the lifting risk abnormality threshold.

[0041] Compared with the prior art, the present invention obtains point cloud data of the object to be hoisted and the current wind direction and wind speed of the sea breeze, constructs a three-dimensional model of the object to be hoisted based on the point cloud data, constructs a reference surface based on the current wind direction of the sea breeze, determines the difference in symmetrical morphological characteristics of the three-dimensional model corresponding to the object to be hoisted in different postures relative to the reference surface, determines the optimal hoisting posture of the object to be hoisted based on the difference in symmetrical morphological characteristics, and fixes the object to be hoisted in the optimal hoisting posture for hoisting, calculates the windward force difference characterization coefficient for the object to be hoisted based on the symmetrical morphological characteristic difference and the size characteristics corresponding to the three-dimensional model in the optimal hoisting posture, combined with the current wind speed of the sea breeze, predicts whether the object to be hoisted meets the windward force difference standard during the hoisting process based on the windward force difference characterization coefficient, and makes a risk assessment on the object to be hoisted, including: obtaining the wind direction change of the current sea breeze in real time, judging whether there is a hoisting risk based on the windward force difference characterization coefficient corresponding to the object to be hoisted after the wind direction change combined with the current hoisting speed, generating a recommended hoisting speed, and improving the safety of offshore construction.

[0042] In particular, the present invention determines the optimal lifting posture for the object to be lifted in advance, and lifts the object to be lifted with the optimal lifting posture. In actual situations, for some irregular objects to be lifted, especially for larger objects to be lifted, under the influence of sea breeze, due to the influence of morphological differences, the forces at different positions on the windward side of the object to be lifted are different. During the lifting process, irregular shaking will occur under the influence of the force, and even the object to be lifted will fall off, causing serious consequences. Based on this, the present invention constructs a reference surface, calculates the difference in symmetrical morphological features of the corresponding three-dimensional model relative to the reference surface under different postures, and determines the posture of the three-dimensional model under the minimum difference in symmetrical morphological features as the optimal lifting posture of the object to be lifted, so as to balance the uneven force on the windward side of the object to be lifted to the maximum extent. In the case of not meeting the windward force standard, further risk judgment is performed to provide data parameter support for the lifting of the object to be lifted, thereby improving the safety of offshore construction.

[0043] In particular, the present invention calculates the windward force difference characterization coefficient. During the lifting process, the wind direction and wind speed of the ambient wind may change, causing the windward force under the predetermined optimal lifting posture to change, affecting the lifting stability and the movement process of the object to be lifted, which may easily lead to the occurrence of risks. Therefore, whether the lifting process can remain stable is the basis for determining whether there is a risk in offshore construction. Based on this, the present invention calculates the windward force difference characterization coefficient and the lifting speed based on real-time monitoring data when the ambient wind direction and wind speed change, thereby calculating the lifting risk abnormality value, and determining whether the lifting risk is abnormal based on the lifting risk abnormality value, adjusting parameters for the lifting process with lifting risks, generating recommended lifting speeds, and improving the safety of offshore construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 A schematic diagram of the method steps of a risk assessment method based on offshore construction according to an embodiment of the invention;

[0045] Figure 2 A logic block diagram for determining whether the predicted object to be hoisted meets the windward force difference standard during the hoisting process according to an embodiment of the invention;

[0046] Figure 3 A logic block diagram for determining whether the object to be hoisted responds to the prediction result according to an embodiment of the invention;

[0047] Figure 4 A logic block diagram for determining whether there is a lifting risk in an embodiment of the invention. DETAILED DESCRIPTION

[0048] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0049] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0050] It should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] See also Figures 1 to 4 As shown, Figure 1This is a schematic diagram of the method steps of the risk assessment method based on offshore construction according to an embodiment of the invention. Figure 2 A logic block diagram for determining whether the object to be hoisted meets the windward force difference standard during the hoisting process in an embodiment of the invention is predicted. Figure 3 A logic block diagram for determining whether the object to be hoisted responds to the prediction result in an embodiment of the invention. Figure 4 A logical block diagram for determining whether there is a lifting risk in an embodiment of the invention. The risk assessment method based on offshore construction of the invention comprises:

[0052] Step S1, obtaining point cloud data of the object to be hoisted and the wind direction and wind speed of the current sea breeze, and constructing a three-dimensional model of the object to be hoisted based on the point cloud data;

[0053] Step S2, constructing a reference surface of the sea breeze direction based on the current sea breeze direction, determining the difference in symmetrical morphological features of the three-dimensional model corresponding to the object to be hoisted in different postures relative to the reference surface, and determining the optimal hoisting posture of the object to be hoisted based on the difference in symmetrical morphological features;

[0054] Step S3, fixing the object to be hoisted in an optimal hoisting posture for hoisting, and calculating the windward force difference characterization coefficient for the object to be hoisted based on the symmetrical morphological feature difference and size feature corresponding to the three-dimensional model under the optimal hoisting posture and the current sea breeze speed;

[0055] Step S4, predicting whether the object to be hoisted meets the windward force difference standard during the hoisting process based on the windward force difference characterization coefficient;

[0056] Step S5, in response to the prediction result, a risk assessment is performed on the object to be hoisted, including:

[0057] The wind direction change of the current sea breeze is obtained in real time, and the lifting risk abnormal value is calculated based on the corresponding windward force difference characterization coefficient of the object to be lifted after the wind direction changes and the current lifting speed. According to the lifting risk abnormal value, it is determined whether there is a lifting risk and a recommended lifting speed is generated.

[0058] Specifically, there is no limitation on the method of acquiring point cloud data. For example, it can be a laser scanner, a depth camera, etc. It only needs to obtain the point cloud data of the object to be hoisted and construct a three-dimensional model of the object to be hoisted. Technical personnel in this field can pre-scan the object to be hoisted before hoisting, which will not be repeated here.

[0059] Specifically, there is no limitation on the method of obtaining the sea breeze direction. For example, it can be satellite remote sensing data, offshore wind towers, etc. As long as the sea breeze direction data can be obtained and subsequent calculations can be performed, technical personnel in this field can make a choice based on actual conditions, which will not be elaborated here.

[0060] Specifically, there is no limitation on the method of obtaining the sea breeze speed. For example, a wind speed sensor may be set up on site. It is only necessary to obtain the sea breeze speed data and perform subsequent calculations. Those skilled in the art may make a choice based on actual conditions, which will not be elaborated here.

[0061] Specifically, the process of determining the difference in symmetric morphological features of the three-dimensional model corresponding to the object to be hoisted in different postures relative to the reference surface includes:

[0062] Constructing a reference surface perpendicular to the horizontal plane and passing through the center of gravity of the three-dimensional model according to the sea wind direction;

[0063] Constructing a rotation axis perpendicular to the horizontal plane through the center of gravity, rotating the three-dimensional model to change the posture, and calculating the difference in symmetrical morphological features on both sides of the reference plane when the three-dimensional model is in different postures;

[0064] The difference in symmetrical morphological features is the difference in surface area of ​​the three-dimensional models on both sides of the reference surface.

[0065] Specifically, there is no limitation on the method for obtaining the center of gravity of the three-dimensional model. For example, it can be the geometric center method, grid analysis method, etc., as long as the center of gravity of the three-dimensional model can be obtained. Technical personnel in this field can choose according to actual conditions, which will not be elaborated here.

[0066] Specifically, the process of determining the optimal lifting posture of the object to be lifted includes:

[0067] Determining the posture of the three-dimensional model at a minimum symmetrical morphological feature difference;

[0068] The posture is determined as the optimal lifting posture.

[0069] It can be understood that the three-dimensional model is constructed based on the object to be hoisted. When hoisting is performed in the optimal hoisting posture, the object to be hoisted can be fixed based on the optimal hoisting posture determined by the three-dimensional model. For example, taking the hoisting on the hoisting platform as an example, the object to be hoisted is placed on the hoisting platform and fixed in the optimal hoisting posture before hoisting. This will not be repeated.

[0070] Specifically, the process of determining dimensional characteristics includes,

[0071] Get the maximum horizontal length and maximum vertical height of the object to be hoisted;

[0072] Determine the product of the maximum horizontal length and the maximum vertical height of the object to be hoisted;

[0073] The product is determined as a size characteristic.

[0074] Specifically, the windward force difference characterization coefficient for the object to be hoisted is calculated according to formula (1):

[0075]

[0076] In formula (1), A represents the coefficient of windward force difference characterization, Z represents the difference in symmetrical morphological characteristics, Z0 represents the difference in reference symmetrical morphological characteristics, C represents the size characteristic, C0 represents the reference size characteristic, F represents the current sea breeze speed, F0 represents the reference sea breeze speed, α represents the size characteristic weight coefficient, and β represents the current sea breeze speed weight coefficient.

[0077] The reference symmetric morphological feature difference is calculated in advance, wherein the symmetric morphological feature difference of different objects to be hoisted can be calculated in advance, and the average reference symmetric morphological feature difference ΔZ is solved, and Z0=z×ΔZ is set, where z is the symmetric morphological feature difference accuracy coefficient, 1.09<z<1.19.

[0078] The reference sea breeze speed is calculated in advance, wherein the sea breeze speed at different times can be calculated in advance, and the average sea breeze speed ΔF is solved, and F0=f×ΔF is set, f is the sea breeze speed accuracy coefficient, 1.15<f<1.35.

[0079] In this embodiment, a is 0.4 and β is 0.6.

[0080] The reference size feature is in the interval [5m 2 , 10m 2 ] to select.

[0081] Specifically, the present invention determines the optimal lifting posture for the object to be lifted in advance, and lifts the object to be lifted with the optimal lifting posture. In actual situations, for some irregular objects to be lifted, especially for larger objects to be lifted, under the influence of sea breeze, due to the influence of morphological differences, the forces at different positions on the windward side of the object to be lifted are different. During the lifting process, irregular shaking will occur under the influence of the force, and even the object to be lifted will fall off, causing serious consequences. Based on this, the present invention constructs a reference surface, calculates the difference in symmetrical morphological features of the corresponding three-dimensional model relative to the reference surface under different postures, and determines the posture of the three-dimensional model under the minimum difference in symmetrical morphological features as the optimal lifting posture of the object to be lifted, so as to balance the uneven force on the windward side of the object to be lifted to the maximum extent. When the windward force standard is not met, further risk judgment is performed to provide data parameter support for the lifting of the object to be lifted, thereby improving the safety of offshore construction.

[0082] Specifically, based on the windward force difference characterization coefficient, it is predicted whether the object to be hoisted meets the windward force difference standard during the hoisting process, wherein:

[0083] If the windward force difference characterization coefficient is less than or equal to the reference windward force difference characterization coefficient, the object to be hoisted meets the windward force difference standard during the hoisting process;

[0084] If the windward force difference characterization coefficient is greater than the benchmark windward force difference characterization coefficient, the object to be hoisted does not meet the windward force difference standard during the hoisting process.

[0085] Specifically, the benchmark upwind force difference characterization coefficient is selected in the interval [1.35, 1.45].

[0086] Specifically, it is determined whether the object to be hoisted responds to the prediction result, wherein:

[0087] If the object to be hoisted does not meet the windward force difference standard during the hoisting process, a response is made to the test result.

[0088] Specifically, the lifting risk abnormal value is calculated according to formula (2):

[0089]

[0090] In formula (2), B represents the abnormal value of lifting risk, A represents the windward force difference characterization coefficient, A0 represents the reference windward force difference characterization coefficient, V represents the lifting speed, V0 represents the reference lifting speed, δ represents the accuracy coefficient of the windward force difference characterization coefficient, and ε represents the accuracy coefficient of the lifting speed.

[0091] The benchmark windward force difference characterization coefficient is calculated in advance, wherein the windward force difference characterization coefficient measured when hoisting different hoisted objects can be calculated in advance, and the mean value ΔA of the windward force difference characterization coefficient is solved, and A0=a×ΔA is set, a is the accuracy coefficient of the windward force difference characterization coefficient, 1.2<a<1.5.

[0092] The reference lifting speed is selected within the range [10m / min, 20m / min].

[0093] In this embodiment, δ is 0.47 and ε is 0.53.

[0094] Specifically, the process of determining whether there is a lifting risk includes:

[0095] If the lifting risk abnormal value is greater than the predetermined lifting risk abnormal threshold, it is determined that there is a lifting risk;

[0096] If the lifting risk abnormal value is less than or equal to the predetermined lifting risk abnormal threshold, it is determined that there is no lifting risk.

[0097] Specifically, the lifting risk abnormal threshold Bo is selected from the interval [1.2, 1.5].

[0098] Specifically, the recommended lifting speed is determined based on whether there is a lifting risk, where:

[0099] If there is a lifting risk, a recommended lifting speed is generated, and the generated lifting speed is negatively correlated with the lifting risk abnormality threshold;

[0100] It is understandable that the ambient wind direction and wind speed are external factors that affect the risk of lifting. When combined with the lifting speed, the impact of the ambient wind on the hoisted objects will be amplified. The lifting risk can be reduced by reducing the lifting speed.

[0101] Optionally, the lifting risk abnormality threshold B is compared with the first lifting risk abnormality threshold B1 and the second lifting risk abnormality threshold B2, wherein:

[0102] When B>B2, V=0.45V1;

[0103] When B1≤B≤B2, V=0.65V1;

[0104] When B<B1, V=0.85V1.

[0105] B1=1.25B0, B2=1.5B0, V1 represents the initial lifting speed.

[0106] Specifically, the present invention calculates the windward force difference characterization coefficient. During the lifting process, the wind direction and wind speed of the ambient wind may change, causing the windward force under the predetermined optimal lifting posture to change, affecting the lifting stability and the movement process of the object to be lifted, which is likely to cause risks. Therefore, whether the lifting process can remain stable is the basis for determining whether there are risks in offshore construction. Based on this, the present invention calculates the windward force difference characterization coefficient and the lifting speed based on real-time monitoring data when the ambient wind direction and wind speed change, thereby calculating the lifting risk abnormality value, and determining whether the lifting risk is abnormal based on the lifting risk abnormality value, adjusting parameters for the lifting process with lifting risks, generating recommended lifting speeds, and improving the safety of offshore construction.

[0107] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A risk assessment method based on offshore construction, characterized in that: include: Step S1, obtaining point cloud data of the object to be hoisted and the wind direction and wind speed of the current sea breeze, and constructing a three-dimensional model of the object to be hoisted based on the point cloud data; Step S2, constructing a reference surface of the sea breeze direction based on the current sea breeze direction, determining the difference in symmetrical morphological features of the three-dimensional model corresponding to the object to be hoisted in different postures relative to the reference surface, and determining the optimal hoisting posture of the object to be hoisted based on the difference in symmetrical morphological features; Step S3, fixing the object to be hoisted in an optimal hoisting posture for hoisting, and calculating the windward force difference characterization coefficient for the object to be hoisted based on the symmetrical morphological feature difference and size feature corresponding to the three-dimensional model under the optimal hoisting posture and the current sea breeze speed; Step S4, predicting whether the object to be hoisted meets the windward force difference standard during the hoisting process based on the windward force difference characterization coefficient; Step S5, in response to the prediction result, a risk assessment is performed on the object to be hoisted, including: Obtain the wind direction change of the current sea breeze in real time, calculate the lifting risk abnormal value based on the corresponding windward force difference characterization coefficient of the object to be lifted after the wind direction changes and the current lifting speed, determine whether there is a lifting risk according to the lifting risk abnormal value, and generate a recommended lifting speed; In step S2, the process of determining the difference in symmetric morphological features of the corresponding three-dimensional model of the object to be hoisted in different postures relative to the reference surface includes: Constructing a reference surface perpendicular to the horizontal plane and passing through the center of gravity of the three-dimensional model according to the sea wind direction; Constructing a rotation axis perpendicular to the horizontal plane through the center of gravity, rotating the three-dimensional model to change the posture, and calculating the difference in symmetrical morphological features on both sides of the reference plane when the three-dimensional model is in different postures; The difference in symmetrical morphological features is the difference in surface area of ​​the three-dimensional models on both sides of the reference surface; In step S3, the windward force difference characterization coefficient for the object to be hoisted is calculated according to formula (1): In formula (1), A represents the coefficient of windward force difference characterization, Z represents the difference of symmetrical morphological characteristics, Z0 represents the difference of reference symmetrical morphological characteristics, C represents the size characteristic, C0 represents the reference size characteristic, F represents the current sea breeze speed, F0 represents the reference sea breeze speed, α represents the size characteristic weight coefficient, and β represents the current sea breeze speed weight coefficient; In step S5, the abnormal value of the lifting risk is calculated according to formula (2): In formula (2), B represents the abnormal value of lifting risk, A represents the windward force difference characterization coefficient, A0 represents the benchmark windward force difference characterization coefficient, V represents the lifting speed, V0 represents the benchmark lifting speed, δ represents the weight coefficient of the windward force difference characterization coefficient, and ε represents the lifting speed weight coefficient.

2. The risk assessment method based on offshore construction according to claim 1 is characterized in that: In step S2, the process of determining the optimal lifting posture of the object to be lifted includes: Determining the posture of the three-dimensional model at a minimum symmetrical morphological feature difference; The posture is determined as the optimal lifting posture.

3. The risk assessment method based on offshore construction according to claim 1 is characterized in that: In step S3, the process of determining the size feature includes: Get the maximum horizontal length and maximum vertical height of the object to be hoisted; Determine the product of the maximum horizontal length and the maximum vertical height of the object to be hoisted; The product is determined as a size characteristic.

4. The risk assessment method based on offshore construction according to claim 1 is characterized in that: In the step S4, whether the object to be hoisted meets the windward force difference standard during the hoisting process is predicted based on the windward force difference characterization coefficient, wherein: If the windward force difference characterization coefficient is less than or equal to the reference windward force difference characterization coefficient, the object to be hoisted meets the windward force difference standard during the hoisting process; If the windward force difference characterization coefficient is greater than the benchmark windward force difference characterization coefficient, the object to be hoisted does not meet the windward force difference standard during the hoisting process.

5. The risk assessment method based on offshore construction according to claim 1 is characterized in that: In step S5, it is determined whether the object to be hoisted responds to the prediction result, wherein: If the object to be hoisted does not meet the windward force difference standard during the hoisting process, a response is made to the test result.

6. The risk assessment method based on offshore construction according to claim 1 is characterized in that: In step S5, the process of determining whether there is a lifting risk includes: If the lifting risk abnormal value is greater than the predetermined lifting risk abnormal threshold, it is determined that there is a lifting risk; If the lifting risk abnormal value is less than or equal to the predetermined lifting risk abnormal threshold, it is determined that there is no lifting risk.

7. The risk assessment method based on offshore construction according to claim 1 is characterized in that: In step S5, a recommended hoisting speed is generated based on whether there is a hoisting risk, wherein: If there is a lifting risk, a recommended lifting speed is generated, and the generated lifting speed is negatively correlated with the lifting risk abnormality threshold.

Images