CN116500704A - Operability forecasting method for offshore wind power construction ship - Google Patents
Operability forecasting method for offshore wind power construction ship Download PDFInfo
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Abstract
The invention discloses an operability forecasting method of an offshore wind power construction ship, which comprises the following steps of: collecting environment data of the construction sea area where the wind field is located for 3 hours in a future period of time; determining two workability standards of the construction ship; according to the collected wave conditions, calculating six-degree-of-freedom motion response of the construction ship under different 3-hour wave conditions, and judging whether the six-degree-of-freedom motion response of the ship meets an operability balance standard according to a calculation result; judging whether the wind power meets the second operability balance according to the collected different 3-hour wind power data; forecasting the operability of the offshore wind power construction ship in a construction sea area; collecting actual operation conditions of the construction ship in an operability forecasting time period; and comparing the actual operation condition in the collected workability forecast time period with the previous workability forecast result. The invention can more accurately forecast whether the offshore wind power construction ship can operate.
Description
Technical Field
The invention relates to an operability forecasting method for an offshore wind power construction ship.
Background
With the development of offshore wind power in China, offshore resources are gradually developed, and the construction of offshore wind power stations is increasingly developed to deep sea areas. The deep sea area has deeper water depth and worse wave condition, and the multi-peak spectrum mixed wave is a big characteristic of the deep sea area. In general, a multimodal spectrum of mixed waves consists of short periods of storms and long periods of swells. The motion response of the floating ship is aggravated under the influence of long-period surge in the deep sea area, the adverse effect is brought to the construction safety and the construction quality of the offshore wind power, and the construction of the offshore wind power faces a great challenge.
At present, offshore wind power construction is mainly divided into fan foundation construction and fan component installation construction. The fan foundation mainly comprises a single pile foundation, a jacket foundation and a high pile cap foundation. The fan component installation is mainly divided into integral installation and split installation. The ships used for the wind power construction mainly comprise a crane ship, a piling ship, a concrete stirring ship, a transport ship, a self-elevating platform ship, a base ship and the like. The self-elevating platform ship and the seafloor ship can be located on the sea bottom in a certain mode during working, so that the influence of waves is small, and floating ships such as a crane ship, a piling ship, a concrete stirring ship and a transport ship are very sensitive to the waves. Currently, when wind power construction is performed by offshore wind power constructors by adopting the floating ship, whether the ship can operate or not is judged mainly according to experience. However, as offshore wind power progresses to a far-reaching sea area, environmental conditions of offshore wind power construction become worse, a construction mode performed only by experience may cause erroneous judgment of a construction window, a construction delay is caused by light weight, and construction safety is affected by heavy weight, so that it is necessary to provide an operational prediction method of an offshore wind power construction ship.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a method for forecasting the operability of the offshore wind power construction ship, which can more accurately forecast whether the offshore wind power construction ship can operate or not and improve the construction efficiency of offshore wind power.
The purpose of the invention is realized in the following way: a workability forecasting method of an offshore wind power construction ship comprises the following steps:
collecting environment data of a construction sea area at a wind place in a future period of time, wherein the environment data comprise wave data and wind power data, and the environment data comprise wave data and wind power data;
step two, determining two workability balance standards of the construction ship according to the previous construction experience; the first operability balance is that the six-degree-of-freedom motion response of the ship is not more than a certain value, and the second operability balance is that the wind power of the construction sea area is not more than a certain value;
step three, according to the collected wave conditions, six-degree-of-freedom motion response of the construction ship under different 3-hour wave conditions is calculated through floating body dynamics calculation software, and whether the six-degree-of-freedom motion response of the ship meets an operability balance standard or not is judged according to calculation results;
judging whether the wind power meets the second operability balance according to the collected different 3-hour wind power data;
fifthly, forecasting the operability of the offshore wind power construction ship in a construction sea area, if the six-degree-of-freedom motion response of the ship in a certain 3 hours meets the operability balance one, and meanwhile, the wind power data in the 3 hours meets the operability balance two, forecasting the ship to be operable in the 3 hours, otherwise forecasting the ship to be incapable of being operable in the 3 hours;
step six, collecting actual operation conditions of the construction ship in an operation prediction time period;
step seven, comparing the actual operation condition of the construction ship in the collected workability forecasting time period with the previous workability forecasting result; if the accuracy rate of the workability forecast is 100%, repeating the first step to the sixth step, and continuously adopting the two previously determined workability standards to conduct the workability forecast of the next stage until the wind power construction of the wind farm is finished; if the accuracy of the workability forecast is not 100%, correcting the two workability balances, repeating the steps one to six, and carrying out the workability forecast of the next stage by adopting the corrected two workability balances until the wind power construction of the wind farm is finished.
The method for forecasting the operability of the offshore wind power construction ship comprises the following steps that in the step one, wave data comprise sense wave height of wind waves, average period of wind waves, sense wave height of main waves, average period of main waves, sense wave height of secondary waves and average period of secondary waves; the wind data includes wind power and gust wind power.
According to the method for forecasting the operability of the offshore wind power construction ship, in the third step, the six-degree-of-freedom motion response of the construction ship is calculated, a ship model is built first, and then the six-degree-of-freedom motion response of the construction ship under different 3-hour wave conditions is obtained according to the collected 3-hour wave data.
The method for forecasting the operability of the offshore wind power construction ship has the following characteristics:
1. at present, as the transportation barge is mainly adopted to be matched with a crane ship, a piling ship and the like when offshore wind power construction is carried out, the automation degree is low, and the requirements on construction experience of constructors are high. However, as offshore wind power gradually goes to open sea, environmental conditions become worse, and whether the ship can operate or not is judged by simply relying on construction experience, so that the construction requirement cannot be met. According to the method for forecasting the operability of the marine wind farm ship, provided by the invention, the method for forecasting the operability of the marine wind farm ship is continuously optimized by adopting the methods for forecasting the operability, collecting actual operating conditions and correcting the operability balance, and the method for forecasting the operability of the marine wind farm ship is more dependent on the collection of the actual operating conditions rather than on the past construction experience alone, so that the operability of the ship construction can be more accurately forecasted.
2. At present, the national hydrologic standard has not paid enough attention to the identification of the multimodal spectrum, and the adopted statistical method is to actually mix the multimodal spectrum of the surge and the stormy waves into a single-modal spectrum; because the floating vessels commonly used in offshore wind power construction are very sensitive to wave cycles, the currently adopted sea wave form of mixing a multimodal spectrum into a unimodal spectrum brings great risk to early decisions of offshore wind power construction units. Along with the gradual development of the offshore wind farm to the deep open sea area, most of the offshore wind farm is in a multimodal spectrum mixed wave condition, so that the invention adopts wave data after wind and surge separation to be beneficial to more accurately forecasting the operability of the construction ship.
Drawings
FIG. 1 is a flow chart of a method of workability prediction of an offshore wind construction vessel of the present invention;
FIG. 2 is a graph of pitching motion response calculated from the sea wave conditions of the first day of predicted crane ship construction at the time of step three of the workability prediction method of the offshore wind power construction ship of the present invention;
fig. 3 is a graph showing a pitching motion response calculated under the sea wave condition of the third day of the predicted crane ship construction when the step three of the workability prediction method of the offshore wind power construction ship of the present invention is performed.
Detailed Description
The invention will be further described with reference to the accompanying drawings.
Referring to fig. 1, the method for forecasting the operability of the offshore wind power construction ship comprises the following steps:
collecting environment data of a construction sea area at a wind place in a future period of time, wherein the environment data comprise wave data and wind power data, and the environment data comprise wave data and wind power data; the wave data comprises sense wave height of the wind wave, average period of the wind wave, sense wave height of the main surge, average period of the main surge, sense wave height of the secondary surge and average period of the secondary surge; the wind power data comprise wind power and gust wind power;
the weather hydrologic forecasting website comprises an open source website and a commercial website; because of the existence of the multi-peak spectrum mixed wave in the deep sea area and the influence of long-period surge on floating ship construction, the collected wave data are data after wind surge separation, namely the wave data comprise sense wave height of the wind wave, average period of the wind wave, sense wave height of the main surge, average period of the main surge, sense wave height of the secondary surge and average period of the secondary surge; in addition, as the sea wave has the stability of 3 hours, the environmental data of the sea area environmental forecast website are all given in a form of 3 hours by 3 hours;
for wind power data, wind power and gust wind power are given in the environment forecast, wherein the wind power refers to average wind power in 3 hours, and the gust wind power is the maximum instantaneous wind power in 3 hours; wind power has various units and expression methods, such as meters per second, knots, kilometers per hour, or expressed by the typhus wind level, and the various expression methods can be converted;
step two, determining two workability balance standards of the construction ship according to the previous construction experience; the operability is balanced in that the six-degree-of-freedom motion response of the ship does not exceed a certain value; the second operational balance is that the wind power of the construction sea area cannot be larger than a certain value;
when the floating ship is constructed, six-degree-of-freedom motions are generated under the induction of sea waves, and when the motion amplitude exceeds a certain value, the floating ship cannot be constructed; meanwhile, when the ship performs wind power construction, the lifting hook can shake due to larger wind power, so that the hanging hook and lifting operation of a lifted object are affected, and when the wind power is larger than a certain critical value, the construction cannot be performed;
step three, according to the collected wave conditions, six-degree-of-freedom motion response of the construction ship under different 3-hour wave conditions is calculated through floating body dynamics calculation software, and whether the six-degree-of-freedom motion response of the ship meets an operability balance standard or not is judged according to calculation results;
calculating six-degree-of-freedom motion response of the construction ship, and adopting WAMIT or ANSYS AQWA floating body dynamics calculation software; firstly, building a ship model, and then obtaining six-degree-of-freedom motion response of the construction ship under different 3-hour wave conditions according to the collected 3-hour wave data;
judging whether the wind power meets the second operability balance according to the collected different 3-hour wind power data;
fifthly, forecasting the operability of the offshore wind power construction ship in a construction sea area, if the six-degree-of-freedom motion response of the ship in a certain 3 hours meets the operability balance one, and meanwhile, the wind power data in the 3 hours meets the operability balance two, forecasting the ship to be operable in the 3 hours, otherwise forecasting the ship to be incapable of being operable in the 3 hours;
step six, collecting actual operation conditions of the construction ship in an operation prediction time period;
step seven, comparing the actual operation condition of the construction ship in the collected workability forecasting time period with the previous workability forecasting result; if the accuracy rate of the workability forecast is 100%, repeating the first step to the sixth step, and continuously adopting the two previously determined workability standards to conduct the workability forecast of the next stage until the wind power construction of the wind farm is finished; if the accuracy of the workability forecast is not 100%, correcting the two workability balance standards, and repeating the steps one to six to forecast the workability of the next stage until the wind power construction of the wind farm is finished.
The invention will now be described by taking the construction of a single pile foundation of a crane vessel in an offshore wind farm as an example, the crane vessel having a captain of 150.2m, a profile width of 42.0m, a profile depth of 10.8m, and a design draft of 5.7m.
Collecting environmental data of a certain offshore wind farm for wind power single pile foundation construction by a crane ship, wherein wave data are derived from a Katon ocean International organization (Mercator Ocean International), and wind power data are derived from a winny website; the 3-hour weather forecast data of the year 2020, 12, 15 is collected in the year 2020, 12, 14, and comprises eight environmental data including a sense wave height of wind waves (m), a mean period of wind waves(s), a sense wave height of main waves (m), a mean period of main waves(s), a sense wave height of secondary waves (m), a mean period of secondary waves(s), wind power (typhoon level), gust wind power (typhoon level) and the like, and the specific environmental data are shown in the following table 1:
TABLE 1
Step two, according to the past construction experience, two workability standards of the crane ship in the sea area are determined, wherein the workability standards are as follows: the pitch angle of the crane ship is not more than 0.6 degrees; workability balance two: the wind power is not more than 7 grades; the details are shown in Table 2 below:
TABLE 2
| Balance standard | Content |
| Balance one | The pitching angle of the crane ship is not more than 0.6 DEG |
| Balance two | The wind power is not more than 7 grades |
Modeling the crane ship in floating body dynamics calculation software, inputting the collected 12-month 15-year wave data, calculating the pitching motion response of the crane ship, and judging whether the crane ship can operate under all 3-hour sea waves, namely judging whether the pitching motion response of the crane ship meets the operational balance standard; the specific calculation results are shown in fig. 2 and the following table 3:
TABLE 3 Table 3
Judging whether the crane ship can operate under all 3-hour wind power conditions of 12 months and 15 days in 2020 according to the collected wind power data, namely whether eight 3-hour wind power data of 15 days in 2020 meets an operability balance two; the details are shown in Table 4 below:
TABLE 4 Table 4
Fifthly, forecasting the operability of the crane ship in the construction sea area in 12 months in 2020, wherein according to the table 3 and the table 4, the six-degree-of-freedom motion response of the crane ship in eight 3 hours of 12 months in 2020 meets the operability balance one, and meanwhile, the wind power in eight 3 hours of 15 months in 2020 also meets the operability balance two, so that the ship can be forecasted to operate in eight 3 hours of 15 months in 2020; the details are shown in Table 5 below:
TABLE 5
Step six, collecting actual operation conditions of the crane ship on the day of 12 months and 15 days in 2020; the details are shown in Table 6 below:
TABLE 6
Step seven, comparing the operation forecasting result with the actual operation condition according to the actual operation condition of the crane ship in 2020, 12 and 15 days, and correcting the two operation balance marks if the accuracy of the forecasting operation is not 100%, namely correcting and supplementing the operation balance mark two, wherein the concrete steps are shown in the following table 7:
TABLE 7
| Balance standard | Content |
| Balance one | The pitching angle of the crane ship is not more than 0.6 DEG |
| Balance two | Wind power is not more than 6 levels, and gust wind power is not more than 8 levels |
Collecting environmental data of a next time period of a certain offshore wind farm; wave data is from the ocean international organization for ink card support (Mercator Ocean International), and wind data is from the moment website; 3-hour weather forecast data for 12 months and 17 days 2020 were collected for 12 months and 16 days 2020; the environmental data comprise eight items of sense wave height (m), sense wave average period(s), wind power (Type wind level), wind gust wind power (Type wind level) and the like; the details are shown in Table 8 below:
TABLE 8
Calculating pitching motion response of the crane ship through hydrodynamic force calculation software according to the collected environmental data of 12 months and 17 days in 2020; if the pitching angle of the crane ship is not more than 0.6 degrees under the condition of the sea waves for 3 hours, the crane ship can operate under the condition of the sea waves for 3 hours, otherwise, the crane ship cannot operate, and whether the operability balance one is met is judged; see in particular fig. 3 and table 9 below:
TABLE 9
According to the corrected operability balance two and the collected environment data of the year 2020, the condition of wind power of every 3 hours is judged, if the wind power of every 3 hours is not more than 6 levels and the wind power of gusts is not more than 8 levels, the operability balance two is met under the condition of the wind power of every 3 hours, otherwise, the operability balance two is not met, and the following table 10 is concrete:
table 10
Determining whether the crane ship can operate under all environmental conditions of 12 months and 17 days in 2020, every 3 hours; if the first and second operability criteria can be met at the same time under certain 3-hour environment conditions, the crane ship can operate under certain 3-hour environment conditions on 12-17 days 2020, otherwise the crane ship cannot operate: the details are shown in Table 11 below:
TABLE 11
Collecting the actual operation conditions of all crane ships every 3 hours on the same day as 2020.12.17 days; the details are shown in Table 12 below:
table 12
And comparing the predicted operability result with the actual operation condition of the crane ship, and if the accuracy rate of the predicted operability is found to be 100%, continuing to adopt the corrected operability balance one and the corrected operability balance two to perform the ship operability prediction of the next stage until the wind power single pile foundation of the offshore wind farm is constructed.
The above embodiments are provided for illustrating the present invention and not for limiting the present invention, and various changes and modifications may be made by one skilled in the relevant art without departing from the spirit and scope of the present invention, and thus all equivalent technical solutions should be defined by the claims.
Claims (3)
1. The method for forecasting the operability of the offshore wind power construction ship is characterized by comprising the following steps of:
collecting environment data of a construction sea area at a wind place in a future period of time, wherein the environment data comprise wave data and wind power data, and the environment data comprise wave data and wind power data;
step two, determining two workability balance standards of the construction ship according to the previous construction experience; the first operability balance is that the six-degree-of-freedom motion response of the ship is not more than a certain value, and the second operability balance is that the wind power of the construction sea area is not more than a certain value;
step three, according to the collected wave conditions, six-degree-of-freedom motion response of the construction ship under different 3-hour wave conditions is calculated through floating body dynamics calculation software, and whether the six-degree-of-freedom motion response of the ship meets an operability balance standard or not is judged according to calculation results;
judging whether the wind power meets the second operability balance according to the collected different 3-hour wind power data;
fifthly, forecasting the operability of the offshore wind power construction ship in a construction sea area, if the six-degree-of-freedom motion response of the ship in a certain 3 hours meets the operability balance one, and meanwhile, the wind power data in the 3 hours meets the operability balance two, forecasting the ship to be operable in the 3 hours, otherwise forecasting the ship to be incapable of being operable in the 3 hours;
step six, collecting actual operation conditions of the construction ship in an operation prediction time period;
step seven, comparing the actual operation condition of the construction ship in the collected workability forecasting time period with the previous workability forecasting result; if the accuracy rate of the workability forecast is 100%, repeating the first step to the sixth step, and continuously adopting the two previously determined workability standards to conduct the workability forecast of the next stage until the wind power construction of the wind farm is finished; if the accuracy of the workability forecast is not 100%, correcting the two workability balances, repeating the steps one to six, and carrying out the workability forecast of the next stage by adopting the corrected two workability balances until the wind power construction of the wind farm is finished.
2. The method for forecasting the operability of the offshore wind power construction vessel according to claim 1, wherein the wave data comprises a sense wave height of a wind wave, a mean period of the wind wave, a sense wave height of a main surge, a mean period of the main surge, a sense wave height of a secondary surge and a mean period of the secondary surge when the steps are carried out; the wind data includes wind power and gust wind power.
3. The method for predicting the workability of a marine wind power construction vessel according to claim 1, wherein in the third step, a six-degree-of-freedom motion response of the construction vessel is calculated, a vessel model is first established, and then the six-degree-of-freedom motion response of the construction vessel under different 3-hour wave conditions is obtained according to the collected 3-hour wave data.
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| CN112036674A (en) * | 2019-06-04 | 2020-12-04 | 上海电气风电集团有限公司 | Intelligent scheduling method for offshore wind power ship |
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| CN114462840A (en) * | 2022-01-25 | 2022-05-10 | 中交第二航务工程局有限公司 | Over-water construction method for cross-sea bridge under severe sea condition |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112036674A (en) * | 2019-06-04 | 2020-12-04 | 上海电气风电集团有限公司 | Intelligent scheduling method for offshore wind power ship |
| CN113673092A (en) * | 2021-08-02 | 2021-11-19 | 中交第三航务工程局有限公司 | Method for calculating operable window period proportion of pile driving barge |
| CN114462840A (en) * | 2022-01-25 | 2022-05-10 | 中交第二航务工程局有限公司 | Over-water construction method for cross-sea bridge under severe sea condition |
| CN115456232A (en) * | 2022-06-16 | 2022-12-09 | 中交第三航务工程局有限公司 | Method for predicting ratio of operable window in offshore wind power single-pile foundation construction of crane ship |
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