CN110348101A - The wind load acquisition methods and device of offshore structures - Google Patents

Abstract

The present application relates to a method for obtaining wind loads of an offshore structure, the method comprising: obtaining the contours of the offshore structure on different wind-bearing surfaces by performing contour extraction on different wind-bearing surfaces of the offshore structure; The contours of the wind-bearing surface above sea level are extracted at different height intervals to obtain the contours of the wind-bearing surface corresponding to different height intervals; and the height coefficients corresponding to different height intervals, calculate the overall wind load coefficient of the wind-bearing surface; calculate the wind load of the offshore structure according to the overall wind load coefficient, wind direction angle and wind speed of the wind-bearing surface . The method provided by the present application can efficiently obtain the wind load of the offshore structure.

Description

Wind load acquisition method and device for offshore structures

technical field

The present application relates to the technical field of data processing, and in particular, to a method and device for acquiring wind loads of offshore structures, computer equipment, and a computer-readable storage medium.

Background technique

In the design process of offshore structures such as semi-submersible platforms and ships, wind load is an important parameter for the analysis of dynamic positioning and mooring positioning of offshore structures.

In the existing implementation, the parent ship analogy method or the model test method is usually used to obtain the wind load of the offshore structure. The parent ship analogy method is to estimate the wind load of the ship based on the parent ship model test data, but it is difficult to obtain appropriate parent ship model test data, which easily leads to the low accuracy of the estimated wind load. The model test method is to obtain the wind load by testing the design model of the offshore structure, but the design model of the offshore structure needs to be prepared in advance, which takes a long time to prepare for the test and greatly increases the budget.

Therefore, in the design process of offshore structures, how to efficiently obtain the wind load of offshore structures is a technical problem that needs to be solved urgently.

It should be noted that the information disclosed in the above Background section is only for enhancing understanding of the background of the application, and therefore may include information that does not form the prior art known to a person of ordinary skill in the art.

SUMMARY OF THE INVENTION

Based on the above technical problems, the present application provides a wind load acquisition method and device for an offshore structure, computer equipment, and a computer-readable storage medium.

A method for obtaining wind load of an offshore structure, comprising: obtaining the contours of the offshore structure on different wind-bearing surfaces by performing contour extraction on different wind-bearing surfaces of the offshore structure; The contours of different height intervals are extracted from the surface contour, and the contours of the wind-bearing surface corresponding to different height intervals are obtained; The height coefficient is used to calculate the overall wind load coefficient of the wind-bearing surface; the wind load of the offshore structure is calculated according to the overall wind load coefficient, wind direction angle and wind speed of the wind-bearing surface.

A wind load acquisition device for an offshore structure, comprising: an overall contour extraction module for obtaining the contours of the offshore structure on different wind-bearing surfaces by performing contour extraction on the offshore structure on different wind-bearing surfaces; The interval contour extraction module is used to extract the contour of the wind-bearing surface above sea level in different height intervals, and obtain the contour of the wind-bearing surface corresponding to the different height intervals; the wind load coefficient calculation module is used for different height intervals. The area of the contour corresponding to the interval, the shape coefficient corresponding to the offshore structure, and the height coefficient corresponding to different height intervals are used to calculate the overall wind load coefficient of the wind bearing surface; The wind load factor, wind direction angle and wind speed of the wind surface in general calculate the wind load of the offshore structure.

A computer device includes a processor and a memory, the memory stores computer-readable instructions, and when the computer-readable instructions are executed by the processor, implements the above-mentioned wind load acquisition method for an offshore structure.

A computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, implements the above-described wind load acquisition method for an offshore structure.

Compared with the prior art, the embodiments of the present application have the following beneficial effects:

In the above technical solution, the contours of the offshore structures on different wind-bearing surfaces are firstly extracted to obtain the contours of the offshore structures on the different wind-bearing surfaces, and then the contours of the wind-bearing surfaces on the sea level are extracted at different height intervals. Contour extraction to obtain the contours of the wind-bearing surface at different height intervals, so as to calculate the wind-bearing surface in The overall wind load coefficient, and the wind load of the offshore structure is calculated according to the overall wind load coefficient, wind direction angle and wind speed of the obtained wind-bearing surface.

In the method disclosed in the embodiment of the present application, the outline of the offshore structure can be extracted only once, and the wind load of the offshore structure can be obtained accordingly, without relying on the model test data of the parent ship or the data of the offshore structure. Design the model so that the wind load acquisition process is more efficient.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not limiting of the present application.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description serve to explain the principles of the application.

Fig. 1 is a flow chart showing a method for obtaining wind loads of offshore structures according to an exemplary embodiment;

Fig. 2 is a flowchart of step 110 in the embodiment corresponding to Fig. 1 in one embodiment;

FIG. 3 is a flowchart of step 130 in the embodiment corresponding to FIG. 1 in one embodiment;

FIG. 4 is a flowchart of step 130 in the corresponding embodiment of FIG. 1 in another embodiment;

Fig. 5 is a flow chart showing a method for obtaining wind loads of offshore structures according to another exemplary embodiment;

FIG. 6 is a flowchart of step 170 in the embodiment corresponding to FIG. 1 in one embodiment;

7 is an orthographic view of a semi-submersible platform according to an exemplary embodiment;

8 is a side projection view of a semi-submersible platform according to an exemplary embodiment;

Fig. 9 is the schematic diagram of the orthographic profile obtained by performing profile extraction on the orthographic view shown in Fig. 7;

Figure 10 is a schematic diagram of a side projection profile obtained by performing profile extraction on the side projection view shown in Figure 8;

Fig. 11 is a block diagram showing a wind load acquisition device of an offshore structure according to an exemplary embodiment;

Fig. 12 is a schematic diagram of a hardware structure of a computer device according to an exemplary embodiment.

By the above-mentioned drawings, the specific embodiments of the present application have been shown, and a more detailed description will follow. These drawings and written descriptions are not intended to limit the scope of the concepts of the present application in any way, but by reference to specific embodiments. The concepts of the present application are explained to those skilled in the art.

Detailed ways

The description will now be made in detail of exemplary embodiments, examples of which are illustrated in the accompanying drawings. Where the following description refers to the drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the illustrative examples below are not intended to represent all implementations consistent with this application. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present application as recited in the appended claims.

As mentioned above, in the design process of offshore structures such as semi-submersible platforms and ships, wind load is an important parameter for the analysis of dynamic positioning and mooring positioning of offshore structures. Therefore, the acquisition of wind load is important for the design of offshore structures very important.

In the existing wind load acquisition methods, the wind load on the offshore structure must be obtained by relying on the model test data of the parent ship or the design model of the offshore structure, and the wind load cannot be obtained efficiently. Therefore, it is necessary to provide A technical solution capable of efficiently acquiring wind loads of offshore structures.

Referring to FIG. 1 , an aspect of the present application provides a method for acquiring wind loads of offshore structures, so as to efficiently acquire the wind loads of offshore structures.

As shown in FIG. 1, in an exemplary embodiment, a method for obtaining wind loads of an offshore structure may include the following steps:

In step 110, the contours of the offshore structure on different wind-bearing surfaces are obtained by extracting the contours of the offshore structure on different wind-bearing surfaces.

Among them, an offshore structure refers to an engineering structure in which part of the structure is submerged in seawater, while the rest of the structure is located above the sea level. As mentioned above, the offshore structure can be a ship or a semi-submersible platform. The specific structure type of the offshore structure is restricted.

The wind-bearing surface of an offshore structure refers to the surface of the offshore structure that is subjected to the pressure generated by the air flow. For example, the wind-bearing surface can be the front and side projection surfaces of the offshore structure, or the surface of other projected forms of offshore structures. , and this is not restricted here.

By extracting the contours of offshore structures on different wind-bearing surfaces, the overall contour can be determined according to the obtained contours of offshore structures on different wind-bearing surfaces.

Step 130: Perform contour extraction on the contour of the wind-bearing surface above the sea level at different height intervals to obtain the contours of the wind-bearing surface corresponding to the different height intervals.

Among them, since the wind-bearing surface above sea level is exposed to the air, it needs to bear the pressure generated by the air flow, that is, the wind load. And corresponding to different height intervals above sea level, the distribution of wind load on the wind-bearing surface should also be different. Therefore, in order to accurately obtain the wind load of the offshore structure, it is necessary to analyze the wind-bearing surface of the offshore structure. The distribution of wind loads in different height intervals is obtained accordingly.

By extracting the contours of the wind-bearing surface above sea level at different height intervals, the contours of the wind-bearing surface at different height intervals can be obtained, so as to further obtain the bearing surface of the offshore structure according to the contour of the wind-bearing surface at different height intervals. The distribution of wind loads on the wind surface at different heights.

It should be noted that the different height intervals of the wind-bearing surface above the sea level are preset, and the height coefficients corresponding to the different height intervals are also different. For wind load calculation, see step 150 for details.

Exemplarily, with reference to the records in Section 2, Chapter 2, Part II of the Rules for Classification of Offshore Mobile Platforms, the heights above sea level are divided into 0-15.3 meters, 16.3-30.5 meters, 30.5-46.0 meters, 46.0- 61.0 meters and other intervals, among which the height coefficient corresponding to the height interval of 0-15.3 meters is 1.0, the height coefficient corresponding to the height interval of 16.3-30.5 meters is 1.1, the height coefficient corresponding to the height interval of 30.5-46.0 meters is 1.2, and the height coefficient corresponding to the height interval of 46.0-61.0 The height coefficient corresponding to the meter height interval is 1.3. Other height intervals and their corresponding height coefficients are not listed here.

Step 150: Calculate the overall wind load coefficient of the wind-bearing surface according to the area of the contour corresponding to the different height intervals, the shape coefficients corresponding to the offshore structures, and the height coefficients corresponding to the different height intervals.

Among them, in Section 2, Chapter 2, Part 2 of the Rules for Classification of Offshore Mobile Platforms, different shape factors are set for different shapes of offshore structures. For example, the shape factors corresponding to spherical offshore structures is 0.4, the shape factor corresponding to large planes (such as hull and deckhouse) is 1.0, and the shape factor corresponding to the derrick is 1.25. In this way, according to the overall outline of the offshore structure, the shape corresponding to the offshore structure can be obtained, so as to determine the corresponding shape coefficient of the offshore structure.

In another embodiment, the shape coefficient corresponding to the offshore structure is preset, so it can be obtained accordingly when the calculation of the wind load coefficient corresponding to the wind bearing surface is performed.

The wind load on the wind-bearing surface of the offshore structure refers to the resultant force generated by the air flow on the wind-bearing surface, that is, the wind load on the wind-bearing surface as a whole, which is the distributed load that varies correspondingly along the height interval. Therefore, the magnitude of the wind load on the wind-bearing surface of the offshore structure is related to the area of the contour corresponding to the wind-bearing surface in different height intervals, the shape coefficient of the offshore structure, and the height coefficients corresponding to different height intervals.

In an exemplary embodiment, for each wind-bearing surface of the offshore structure, the formula for calculating the overall wind load coefficient of the wind-bearing surface is:

Among them, ρ _air is the air density, C _s is the shape coefficient corresponding to the offshore structure, C _h,j is the height coefficient of the wind-bearing surface above sea level corresponding to different height intervals, and j (m≥j≥1) then Represents the number of height intervals corresponding to the wind-bearing surface, and A _j represents the area of the contour corresponding to the wind-bearing surface in different height intervals.

Therefore, in this embodiment, the overall wind load coefficients of different wind-bearing surfaces of the offshore structure can be calculated.

Step 170: Calculate the wind load of the offshore structure according to the overall wind load coefficient, wind direction angle and wind speed of the wind bearing surface.

Among them, the wind direction angle refers to the direction in which the air flows, and the wind speed refers to the speed at which the air flows.

It should be noted that the wind load of an offshore structure refers to the magnitude of the wind load that the offshore structure bears on the whole, so it needs to be based on the overall wind load coefficient of the different wind-bearing surfaces of the offshore structure and the wind load generated by the air flow. The wind direction angle and wind degree are used to calculate the wind load of the offshore structure.

Compared with the prior art, the method provided in this embodiment only needs to extract the outline of the offshore structure at one time, and then the wind load of the offshore structure can be obtained accordingly, without relying on the model test data of the parent ship or the offshore structure. The design model of the structure, thus making the wind load acquisition process more efficient.

In addition, this embodiment also combines the characteristics of the distribution of wind loads on different wind-bearing surfaces of offshore structures along different height intervals, and obtains the wind loads on offshore structures as a whole, and can accurately obtain the wind loads on offshore structures. Wind loads, thus providing effective reference data for the design of offshore structures.

Please refer to FIG. 2 , which is a flowchart of step 110 in the embodiment corresponding to FIG. 1 in one embodiment. In this embodiment, the wind-bearing surface corresponding to the offshore structure includes a front projection surface and a side projection surface of the offshore structure.

As shown in FIG. 2, in an exemplary embodiment, step 110 includes at least the following steps:

Step 111 , extracting the contour calibration points corresponding to the offshore structure from the orthographic projection view and the side projection view of the offshore structure, respectively.

First of all, it should be noted that in the design of offshore structures, the front and side projection surfaces of offshore structures are usually regarded as important wind-bearing surfaces, so as to respond to the overall wind load on offshore structures. Obtain. Therefore, in this embodiment, the front projection surface and the side projection surface of the offshore structure are used as the wind-bearing surfaces corresponding to the offshore structure.

The front projection view and the side projection view of the offshore structure are the design drawings formed in the design of the offshore structure, for example, the offshore structure pattern drawn by AutoCad drawing software.

The contour of the offshore structure is pre-calibrated in the orthographic and side-projection views of the offshore structure, that is, several contour-calibration points are pre-calibrated on the contour lines corresponding to the orthographic and side-projection views to pass these The contour calibration point locates the orthographic and lateral projection contours of the offshore structure. Therefore, in this embodiment, it is only necessary to correspondingly extract the contour calibration points demarcated in the front projection view and the side projection view of the offshore structure.

It is easy to understand, in order to enable the contour calibration points to achieve accurate contour positioning, for contour lines with complex shapes, a large number of contour calibration points can be used to calibrate the contour lines.

Step 113 , by connecting the extracted contour calibration points, the orthographic projection contour and the side projection contour of the offshore structure are obtained.

As mentioned above, the contour calibration points are used to accurately locate the orthographic and lateral projection contours of the offshore structure. For the contour calibration points extracted from the orthographic and lateral projection views respectively, the contour calibration points are sequentially adjusted using smooth connecting lines. By connecting at fixed points, the orthographic and lateral projection profiles of offshore structures can be obtained.

In other embodiments, the contour line extraction algorithm may be used to directly extract the orthographic and side projection contours of the offshore structure from the orthographic and side projection views of the offshore structure.

Exemplarily, in the front projection view and side projection view of the offshore structure, the contour line of the offshore structure is specially marked in advance, for example, the line color of the contour line is set to be different from other line colors, or the contour line of the contour line is set. The thickness of the line is set to be different from the thickness of other lines, so that by identifying the contour line of this special mark, the orthographic and side projection contours of the offshore structure can be obtained.

Therefore, with the method provided in this embodiment, the orthographic profile and the side projection profile of the offshore structure can be accurately extracted, which provides accurate information for the subsequent profile extraction and profile area calculation of the wind-bearing surface at different height intervals. data parameter.

Please refer to FIG. 3 , which is a flowchart of step 130 in the embodiment corresponding to FIG. 1 in one embodiment. In this embodiment, the contours of the wind-bearing surface corresponding to different height intervals are obtained according to the draught defined for the offshore structure.

As shown in FIG. 3, in an exemplary embodiment, step 130 at least includes the following steps:

Step 131 , according to the draught of the defined offshore structure, obtain a contour calibration point located above the draught in the contour of the wind-bearing surface.

Among them, the draught defined for the offshore structure corresponds to the height of the offshore structure below the sea level. It is easy to understand that the depth of the offshore structure submerged in the sea water is the draught of the offshore structure.

In this embodiment, the profile of the wind-bearing surface includes profiles corresponding to different wind-bearing surfaces of the offshore structure, such as the orthographic profile and the side projection profile obtained in the above embodiments.

Since the contour of the wind bearing surface contains several contour calibration points, by comparing the height of each contour calibration point relative to the bottom of the offshore structure with the defined draft, it can be determined that the contour calibration point in the contour of the wind bearing surface whose height is greater than the draft is obtained as located at Contour calibration point above the draft.

Exemplarily, the height of the contour calibration point relative to the bottom of the offshore structure can be determined by the position coordinates of the contour calibration point, and according to the position coordinates, it can be determined that the contour calibration point corresponds to the real height information on the offshore structure.

Step 133: Divide the contour calibration points according to a preset height interval.

As mentioned above, the different height intervals above the draught are preset. Therefore, for the contour calibration points located above the draft in the contour of the wind bearing surface, the contour calibration points are divided according to the height difference between the contour calibration point and the draught. in the corresponding height range.

Therefore, corresponding to different height intervals, several contour calibration points are respectively included, so as to locate the contours of the wind-bearing surface on different height intervals according to the contour calibration points corresponding to different height intervals.

Step 135 , by connecting the contour calibration points contained in the same height interval, the contours of the wind bearing surface at different height intervals are obtained.

Therefore, in this embodiment, for different wind-bearing surfaces of the offshore structure, the contour distributions of the parts of each wind-bearing surface above the draft at different height intervals can be obtained respectively. According to the contours of the wind-bearing surface at different height intervals, the area of the wind-bearing surface corresponding to the different height intervals can be obtained accordingly to calculate the overall wind load coefficient of the wind-bearing surface.

In another exemplary embodiment, as shown in FIG. 4, before step 135, step 130 may further include the following steps:

Step 210: Obtain the contour calibration points that are located on the upper side and the lower side of the endpoints of the height interval and are closest to the endpoints of the height interval.

First of all, it should be noted that in different situations, the corresponding drafts of offshore structures should also be different. Exemplarily, the semi-submersible platform can respond to different conditions at sea by lifting and lowering, and the draft of the semi-submersible platform also changes accordingly. For example, the semi-submersible platform is in the daily drilling mode or under extreme weather such as typhoons. The draughts are different from each other.

In the design of offshore structures, these possible situations need to be considered in order to design stable and reliable offshore structures. Therefore, it is often necessary to define the different draughts of offshore structures, and calculate the wind loads that the offshore structures bear corresponding to different drafts.

Therefore, corresponding to different draughts, the areas corresponding to the different height intervals of the wind bearing surface above the draught also change accordingly, resulting in that there may be no contour calibration points pre-calibrated by the designer for the contour of the wind bearing surface. The contour calibration points corresponding to the endpoints of the calibration interval are preset, so the contours of the wind bearing surface at different height intervals cannot be accurately obtained in step 135, thereby affecting the accuracy of wind load calculation on the offshore structure.

In order to solve this problem, it is necessary to accurately obtain the contour points of the wind-bearing surface contour of the offshore structure corresponding to the endpoints of different height intervals, and obtain this contour point as a new contour calibration point. The corresponding contour calibration points are connected, so that the regional boundaries of the wind-bearing surface corresponding to different height intervals can be accurately distinguished.

In this embodiment, by respectively acquiring two contour calibration points on both sides of the height interval end point and closest to the height interval end point, the middle point between the two contour calibration points can be determined as corresponding to the height The new contour calibration point for the endpoints of the interval.

Step 230: Obtain the midpoint between the contour calibration points as the contour calibration point in the contour of the wind-bearing surface corresponding to the end point of the height interval, and divide the contour calibration point into the corresponding height interval.

Among them, according to the obtained position coordinates of the contour calibration points located on both sides of the endpoints of the height interval, the position coordinates corresponding to the middle point can be obtained by performing linear interpolation calculation on the two position coordinates, so as to obtain the corresponding position coordinates in the contour of the wind bearing surface. The contour calibration point of the endpoint of the height interval.

By dividing the obtained contour calibration points into corresponding height intervals, and then sequentially connecting the contour calibration points included in different height intervals according to the content described in step 135, the wind bearing surface at different height intervals can be accurately obtained. contour.

As shown in FIG. 5, in an exemplary embodiment, before step 150, the method for obtaining wind loads of offshore structures further includes the following steps:

Step 310: For the contours of the wind-bearing surface in different height intervals, obtain the coordinates of the contour calibration points contained therein.

Among them, before calculating the overall wind load coefficient of the wind-bearing surface, it is also necessary to calculate separately according to the areas of the wind-bearing surface corresponding to different height intervals, that is, to calculate the contours corresponding to the wind-bearing surface at different height intervals. area.

In this embodiment, the calculation of the area of the contour corresponding to the wind-bearing surface in different height intervals needs to depend on the coordinates of the contour calibration points contained in the contour, so each contour marker contained in the contour corresponding to the different height intervals is required. The coordinates of the fixed point are obtained accordingly.

Step 330: Taking one of the contour calibration points as the fixed point, calculate the area of the triangle formed by the fixed point and the other two adjacent contour calibration points in turn.

Among them, taking the contour of one of the wind-bearing surfaces of the offshore structure at a certain height interval, if the contained contour calibration points are a ₁ , a ₂ , a ₃ , a ₄ , a ₅ , ..., a _n , and taking a ₁ as a fixed point, calculate the areas of triangles a ₁ a ₂ a ₃ , a ₁ a ₃ a ₄ , a ₁ a ₄ a ₅ , ..., a ₁ a _n-1 a _n respectively.

It should be noted that when calculating the area of each triangle, the direction of the hairline of the triangle needs to be considered, and the positive or negative of the area of the triangle is determined according to the direction of the hairline of the triangle. Exemplarily, the counterclockwise direction of the three vertices corresponding to the triangle may be preset to be positive, and the clockwise direction of the three vertices corresponding to the triangle may be set to be negative accordingly.

Step 350: Obtain the area of the triangle and the area of the contour corresponding to this height interval.

Among them, it should be noted that when summing the areas of the above triangles, it is necessary to consider the positive and negative properties of each triangle, and obtain the contour of the wind-bearing surface in this height interval from the absolute value of the sum of the areas of each triangle. area.

Therefore, with the method provided in this embodiment, the contour areas of different wind-bearing surfaces of the offshore structure corresponding to different height intervals can be obtained respectively.

As shown in FIG. 6, in an exemplary embodiment, step 170 specifically includes the following steps:

Step 171: Calculate the wind direction coefficient of the wind load on the offshore structure according to the overall wind load coefficient and wind direction angle of different wind bearing surfaces.

Among them, the wind direction coefficient of the wind load on the offshore structure includes the horizontal wind direction coefficient of the offshore structure in the horizontal direction and the vertical wind direction coefficient in the vertical direction.

It should be understood that the horizontal direction of the offshore structure refers to the direction extending horizontally from one side end to the other side end on the overall structure of the offshore structure, and the vertical direction is the direction perpendicular to the horizontal direction. Taking a ship as an example, the horizontal direction can be understood as the direction from the stern to the bow, that is, the direction of the length of the ship, and the vertical direction refers to the direction perpendicular to the length of the ship, that is, the direction from port to starboard.

In one implementation, firstly, the resultant force coefficient of the wind load borne by the offshore structure needs to be calculated according to the overall wind load coefficient and wind direction angle of different wind bearing surfaces.

It should be noted that, for the acquisition of wind loads on offshore structures, the wind loads on different wind-bearing surfaces of offshore structures should be considered, that is, the resultant force generated by the air flow on the offshore structures as a whole. When calculating the resultant force coefficient corresponding to the offshore structure, the overall wind load coefficient of different wind-bearing surfaces also needs to be considered.

Exemplarily, the formula for calculating the resultant force coefficient corresponding to the offshore structure is:

Among them, a represents the wind direction angle, F _total (a) represents the resultant force coefficient corresponding to the offshore structure when the wind direction angle of the offshore structure is a, F ₁ represents the wind load coefficient of the offshore structure on the orthographic plane, and F ₂ represents the The wind load factor of the offshore structure on the side projection plane.

Therefore, after the resultant force coefficient corresponding to the offshore structure is obtained, the horizontal wind direction coefficient of the offshore structure can be obtained by calculating the product of the resultant force coefficient and the cosine of the wind direction angle, and the offshore structure can be obtained by calculating the product of the resultant force coefficient and the sine of the wind direction angle. The vertical wind direction coefficient of , the corresponding calculation formula is as follows:

C _x (a) = F _total (a) · cosa, C _y (a) = F _total (a) · sina

Among them, C _x (a) represents the horizontal wind direction coefficient of the offshore structure, and C _y (a) represents the vertical wind direction coefficient of the offshore structure.

Step 173: Obtain the wind load of the offshore structure by calculating the product of the wind direction coefficient and the square of the wind speed.

In this embodiment, the product of the horizontal wind direction coefficient of the offshore structure and the square of the wind speed can be calculated respectively to obtain the wind load of the overall structure of the offshore structure in the horizontal direction, and the vertical wind direction coefficient of the offshore structure and the square of the wind speed can be calculated. The product is obtained to obtain the wind load in the vertical direction of the overall structure of the offshore structure.

Therefore, in the design of offshore structures, according to the acquired wind loads in the horizontal and vertical directions of the offshore structures, it is possible to further accurately analyze the dynamic positioning and anchoring positioning of the offshore structures.

The method provided by the present application will be further described below with reference to a specific application scenario.

As shown in Figures 7 and 8, Figure 7 is an orthographic view of a given semi-submersible platform, and Figure 8 is a side projection view of the semi-submersible platform, defining the draft of the semi-submersible platform as 14.25 meters, and The shape factor corresponding to the semi-submersible platform is defined as 1.0. By extracting the contours of the orthographic and side projection views of the semi-submersible platform, the obtained orthographic and side projection contours of the semi-submersible platform are shown in Figures 9 and 10, respectively. And by extracting the contours at different height intervals on the orthographic and side projection contours of the semi-submersible platform above the draft, the obtained contours corresponding to different height intervals are still shown in Figures 9 and 10.

Therefore, for the orthographic profile and side projection profile of the semi-submersible platform, the areas of the profiles corresponding to different height intervals are calculated respectively, and the overall wind load coefficient of the front and side projection surfaces of the semi-submersible platform is calculated, The wind load of the semi-submersible platform is calculated according to the wind load coefficients corresponding to the front projection surface and the side projection surface, the defined wind direction angle and wind speed.

In addition, different draughts can be defined for the semi-submersible platform, and the wind loads of the semi-submersible platform at different draughts can be obtained according to the above process.

It can be seen that the wind load acquisition method of the offshore structure provided in this application only needs to perform an extraction operation on the outline of the offshore structure, and the subsequent calculation of the wind loads at different draughts is based on the extracted outline of the offshore structure. It is not necessary to repeat the extraction operation of the offshore structure diagram, which makes the calculation process of wind load faster and more efficient.

Based on another aspect of the present application, a wind load acquisition device for an offshore structure is also provided.

As shown in FIG. 11 , in an exemplary embodiment, a wind load acquisition device for an offshore structure includes an overall contour extraction module 410 , an interval contour extraction module 430 , a wind load coefficient calculation module 450 and a wind load calculation module 470 .

The overall contour extraction module 410 is used to obtain contours of the offshore structure on different wind-bearing surfaces by performing contour extraction on different wind-bearing surfaces of the offshore structure.

The section contour extraction module 430 is configured to perform contour extraction of the contours of the wind-bearing surface above sea level in different height sections, and obtain the contours of the wind-bearing surface corresponding to the different height sections.

The wind load coefficient calculation module 450 is configured to calculate the overall wind load coefficient of the wind-bearing surface according to the area of the contour corresponding to the different height intervals, the shape coefficient corresponding to the offshore structure, and the height coefficient corresponding to the different height intervals.

The wind load calculation module 470 is configured to calculate the wind load of the offshore structure according to the overall wind load coefficient, wind direction angle and wind speed of the wind bearing surface.

In another exemplary embodiment, the wind bearing surface of the offshore structure includes a front projection surface and a side projection surface, and the overall contour extraction module 410 includes a contour calibration point extraction unit and a wind bearing surface contour acquisition unit.

The contour calibration point extraction unit is used for extracting contour calibration points corresponding to the offshore structure from the orthographic projection view and the side projection view of the offshore structure, respectively.

The wind-bearing surface contour obtaining unit is configured to obtain the orthographic and lateral projection contours of the offshore structure by connecting the extracted contour calibration points.

In another exemplary embodiment, the section contour extraction module 430 includes a draft positioning unit, a contour calibration point dividing unit, and an interval contour obtaining unit.

The draft locating unit is configured to obtain, according to the defined draft of the offshore structure, a contour calibration point located above the draft in the contour of the wind bearing surface, where the draft corresponds to the height of the offshore structure below sea level.

The contour calibration point dividing unit is configured to divide the contour calibration points according to a preset height interval.

The section contour obtaining unit is configured to obtain the contour of the wind bearing surface on the height section by connecting the contour calibration points contained in the same height section.

In another exemplary embodiment, the interval contour extraction module 430 further includes an endpoint side calibration point acquiring unit and an intermediate point acquiring unit.

The endpoint side calibration point acquiring unit is used for acquiring the contour calibration points which are located on the upper side and the lower side of the end point of the height interval respectively and are closest to the end point of the height interval.

The middle point obtaining unit is configured to obtain the middle point between the contour calibration points as the contour calibration point in the wind-bearing surface contour corresponding to the end point of the height interval, and divide the contour calibration point into the corresponding height interval.

In another exemplary embodiment, the wind load acquisition device of the offshore structure further includes a coordinate acquisition module, a sub-area calculation module, and an area sum calculation module.

The coordinate obtaining module is used for obtaining the coordinates of the contour calibration points contained in the contours of the wind-bearing surface at different height intervals.

The sub-area calculation module is configured to take one of the contour calibration points as a fixed point, and sequentially calculate the area of the triangle formed by the fixed point and the other two adjacent contour calibration points.

The area sum calculation module is used to obtain the area sum of the triangle, which is the area of the contour corresponding to the height interval.

In another exemplary embodiment, the wind load calculation module 470 includes a wind direction coefficient acquisition unit and a wind load acquisition unit.

The wind direction coefficient obtaining unit is used to calculate the wind direction coefficient of the wind load borne by the offshore structure according to the overall wind load coefficient and wind direction angle of different wind bearing surfaces, and the wind direction coefficient includes the horizontal direction of the offshore structure. The horizontal wind coefficient and the vertical wind coefficient in the vertical direction.

The wind load obtaining unit is configured to obtain the wind load of the offshore structure by calculating the product of the wind direction coefficient and the square of the wind speed.

In another exemplary embodiment, the wind direction coefficient obtaining unit includes a resultant force coefficient obtaining subunit and a subwind direction coefficient obtaining subunit.

The resultant force coefficient obtaining subunit is used to calculate the resultant force coefficient of the wind load borne by the offshore structure according to the overall wind load coefficient and wind direction angle of different wind bearing surfaces.

The sub-wind direction coefficient obtaining subunit is configured to obtain the product of the resultant force coefficient and the cosine of the wind direction angle as the horizontal wind direction coefficient, and obtain the product of the resultant force coefficient and the sine of the wind direction angle as the vertical wind direction coefficient.

It should be noted that the apparatuses provided in the above embodiments and the methods provided by the above embodiments belong to the same concept, and the specific manners in which each module performs operations have been described in detail in the method embodiments, which will not be repeated here.

Based on another aspect of the present application, an electronic device is also provided, which includes a processor and a memory, wherein the memory stores computer-readable instructions, and when the computer-readable instructions are executed by the processor, implements all of the above-mentioned embodiments. Describe the method of wind load acquisition for offshore structures.

Fig. 12 is a block diagram of an electronic device according to an exemplary embodiment. As shown in FIG. 12 , the computer device may include one or more of the following components: processing component 501 , memory 502 , power supply component 503 , multimedia component 504 , audio component 505 , sensor component 507 , and communication component 508 .

The above components are not all necessary, and the computer device may add other components or reduce some components according to its own functional requirements, which is not limited in this embodiment.

The processing component 501 generally controls the overall operation of the computer device, such as operations associated with display, data communication operations, and log data processing. The processing component 501 may include one or more processors 509 to execute instructions to perform all or some of the steps of the operations described above. Additionally, processing component 501 may include one or more modules to facilitate interaction between processing component 501 and other components. For example, processing component 501 may include a multimedia module to facilitate interaction between multimedia component 504 and processing component 501 .

Memory 502 is configured to store various types of data to support operation of the computer device. Examples of such data include instructions for any application or method to operate on the computer device. Memory 502 may be implemented by any type of volatile or non-volatile storage device or combination thereof. One or more modules are also stored in the memory 502, and the one or more modules are configured to be executed by the one or more processors 509 to complete all or part of the steps in the methods described in the above embodiments.

Power component 503 provides power to various components of the computer device. Power components 503 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to computer devices.

Multimedia component 504 includes a screen that provides an output interface between the computer device and the user. In some embodiments, the screen may include LCD (Liquid Crystal Display, liquid crystal display) and TP (TouchPanel, touch panel).

Audio component 505 is configured to output and/or input audio signals. For example, audio component 505 includes a microphone that is configured to receive external audio signals when the computer device is in operating modes, such as recording mode and speech recognition mode. The received audio signal may be further stored in memory 502 or transmitted via communication component 508 . In some embodiments, audio component 505 also includes a speaker for outputting audio signals.

Sensor assembly 507 includes one or more sensors for providing various aspects of the status assessment of the computer device. For example, the sensor assembly 507 can detect the on/off state of the computer device, the relative positioning of the components, the sensor assembly 507 can also detect the coordinate change of the computer device or a component of the computer device and the temperature change of the computer device.

Communication component 508 is configured to facilitate wired or wireless communications between computer devices and other devices. The computer equipment can access a wireless network based on a communication standard, such as WiFi (WIreless-Fidelity, wireless network), 2G or 3G, or a combination thereof.

In an exemplary embodiment, the computer device may be composed of one or more ASIC (Application Specific Integrated Circuit, application specific integrated circuit), DSP (Digital Signal Processing, digital signal processor), PLD (Programmable Logic Device, programmable logic device) , FPGA (Field-ProgrammableGate Array, Field Programmable Gate Array), controller, microcontroller, microprocessor or other electronic components to achieve.

Based on another aspect of the present application, a computer-readable storage medium is also provided, on which a computer program is stored, and when the computer program is executed by a processor, implements the method for monitoring electronic seals described in the foregoing embodiments.

The above contents are only preferred exemplary embodiments of the present application, and are not intended to limit the embodiments of the present application. Those of ordinary skill in the art can easily make corresponding changes or modifications according to the main concept and spirit of the present application, Therefore, the protection scope of the present application shall be subject to the protection scope required by the claims.

Claims (10)

1. A method for obtaining wind loads of offshore structures, wherein the method comprises: By performing contour extraction on different wind-bearing surfaces of the offshore structure, the contours of the offshore structure on different wind-bearing surfaces are obtained; Perform contour extraction of the contours of the wind-bearing surface above the sea level in different height intervals to obtain the contours of the wind-bearing surface corresponding to the different height intervals; According to the area of the contour corresponding to the different height intervals, the shape coefficient corresponding to the offshore structure and the height coefficient corresponding to the different height intervals, the overall wind load coefficient of the wind bearing surface is calculated; The wind load of the offshore structure is calculated according to the overall wind load coefficient, wind direction angle and wind speed of the wind bearing surface. 2. The method according to claim 1, wherein the wind-bearing surface of the offshore structure comprises a front projection surface and a side projection surface of the offshore structure, and the wind-bearing surface of the offshore structure is subjected to different wind-bearing surfaces. The contour extraction on the surface to obtain the contours of the offshore structure on different wind-bearing surfaces includes: extracting contour calibration points corresponding to the offshore structure from the orthographic projection view and the side projection view of the offshore structure, respectively; By connecting the extracted contour calibration points, the orthographic and lateral projection contours of the offshore structure are obtained. 3 . The method according to claim 1 , wherein the contour extraction of the contour of the wind-bearing surface above sea level is performed in different height intervals to obtain the contours of the wind-bearing surface corresponding to the different height intervals, comprising: 4 . : According to the draught of the defined offshore structure, obtain a contour calibration point located above the draft in the contour of the wind-bearing surface, and the draft corresponds to the height of the offshore structure below the sea level; Divide the contour calibration points according to a preset height interval; By connecting the contour calibration points contained in the same height interval, the contour of the wind bearing surface on the height interval is obtained. 4. The method according to claim 3, characterized in that, before obtaining the contour of the wind-bearing surface on the height interval by connecting the contour calibration points contained in the same height interval, the The method also includes: Obtain the contour calibration points that are located on the upper side and the lower side of the endpoint of the height interval, and are the closest to the endpoint of the height interval; The midpoint between the contour calibration points is acquired as the contour calibration point in the wind-bearing surface contour corresponding to the end point of the height interval, and the contour calibration point is divided into the corresponding height interval. 5 . The method according to claim 4 , wherein the bearing is calculated according to the area of contours corresponding to different height intervals, the shape coefficients corresponding to the offshore structures, and the height coefficients corresponding to different height intervals. 6 . The wind surface is before the overall wind load factor, the method further comprising: For the contours of the wind-bearing surface at different height intervals, obtain the coordinates of the contained contour calibration points; Taking one of the contour calibration points as the fixed point, calculate the area of the triangle formed by the fixed point and the other two adjacent contour calibration points in turn; The sum of the area of the triangle is obtained as the area of the contour corresponding to the height interval. 6 . The method according to claim 1 , wherein the calculating the wind load of the offshore structure according to the overall wind load coefficient, wind direction angle and wind speed of the wind bearing surface comprises: 6 . The wind direction coefficient of the wind load borne by the offshore structure is calculated according to the overall wind load coefficient and wind direction angle of different wind-bearing surfaces, and the wind direction coefficient includes the horizontal wind direction coefficient of the offshore structure in the horizontal direction and the wind direction coefficient in the vertical direction. vertical wind load factor in the direction; The wind load of the offshore structure is obtained by calculating the product of the wind direction coefficient and the square of the wind speed. 7. The method according to claim 6, characterized in that, calculating the wind direction coefficient of the wind load borne by the offshore structure according to the overall wind load coefficient and wind direction angle of different wind bearing surfaces, comprising: According to the overall wind load coefficient and wind direction angle of different wind bearing surfaces, calculate the resultant force coefficient of the wind load on the offshore structure; The product of the resultant force coefficient and the cosine of the wind direction angle is obtained as the horizontal wind direction coefficient, and the product of the resultant force coefficient and the sine of the wind direction angle is obtained as the vertical wind direction coefficient. 8. A wind load acquisition device for an offshore structure, characterized in that the device comprises: The overall contour extraction module is used to obtain the contours of the offshore structure on different wind-bearing surfaces by performing contour extraction on different wind-bearing surfaces of the offshore structure; an interval contour extraction module, which is used to perform contour extraction in different height intervals on the contour of the wind bearing surface above sea level, and obtain the contours of the wind bearing surface corresponding to the different height intervals; The wind load coefficient calculation module is used to calculate the overall wind load coefficient of the wind bearing surface according to the area of the contour corresponding to the different height intervals, the shape coefficient corresponding to the offshore structure and the height coefficient corresponding to the different height intervals; A wind load calculation module, configured to calculate the wind load of the offshore structure according to the overall wind load coefficient, wind direction angle and wind speed of the wind bearing surface. 9. A computer equipment, characterized in that, comprising: processor; and A memory for storing executable instructions of the processor, the processor being configured to perform the method of any one of claims 1 to 7 by executing the executable instructions. 10. A computer-readable storage medium on which a computer program is stored, characterized in that, when the computer program is executed by a processor, the method according to any one of claims 1 to 7 is implemented.