CN116663191A - Method and device for forecasting working capacity of jack-up platform, electronic equipment and storage medium - Google Patents
Method and device for forecasting working capacity of jack-up platform, electronic equipment and storage medium Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F11/00—Lifting devices specially adapted for particular uses not otherwise provided for
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Abstract
The invention provides a method and a device for forecasting working capacity of a jack-up platform, electronic equipment and a storage medium, wherein the forecasting method comprises the steps of obtaining a first load and chord member phase difference which can be born by each pile leg in the pre-pressing process; according to the phase difference between the first load of the spud leg and the chord member, calculating a spud leg load threshold and a bending moment threshold of the spud leg; acquiring a second load, a first bending moment and a second bending moment of the pile leg under the current operation state; summing the first bending moment and the second bending moment to obtain an actual bending moment; and comparing the actual bending moment with a bending moment threshold value and a second load with a pile leg load threshold value to forecast the working capacity of the current platform main body. According to the forecasting method provided by the embodiment of the invention, the self-elevating platform is pre-pressed, the load limit of the pile leg is obtained, the real-time data in the operation process is obtained, the operation capability of the main body of the current platform is forecasted based on the load limit, and the operation safety of the self-elevating platform is ensured.
Description
Technical Field
The present invention relates to the field of jack-up platforms, and in particular, to a method and an apparatus for forecasting an operation capability of a jack-up platform, an electronic device, and a storage medium.
Background
The jack-up platform is necessary equipment for realizing ocean resource development, such as jack-up drilling for oil and gas exploitation, jack-up construction platform for offshore wind power equipment installation and special jack-up accommodation platform.
Generally, a jack-up platform has three to six piles, and because of uncertainties of the seabed address condition and the environmental load, the working capacity of the platform is affected by the uncertainties when the jack-up platform works, and when the environmental condition or the geological condition exceeds the original design condition, the risk is caused when the jack-up platform works according to the rated working capacity of the crane. Therefore, the monitoring of the operation capability of the platform under the current condition, so as to ensure the safe operation of the platform, becomes an important and urgent requirement.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a method for forecasting the working capacity of a jack-up platform, which can forecast the working capacity of a platform body in real time.
In order to solve the technical problems, the invention adopts the following technical scheme:
in a first aspect, according to an embodiment of the present invention, a method for forecasting an operation capability of a jack-up platform, where the jack-up platform includes: the platform body is connected with each truss type pile leg in a one-to-one correspondence manner through a lifting mechanism, the truss type pile legs comprise a plurality of chords which are vertically arranged, and the method comprises the following steps:
acquiring the phase difference between a first load and a chord member, which can be born by each pile leg in the pre-pressing process;
according to the phase difference between the first load of the pile leg and the chord member, calculating a pile leg load threshold and a bending moment threshold of the pile leg;
acquiring a second load born by the pile leg in the current operation state;
acquiring a first bending moment of the pile leg caused by up-and-down guiding of the platform main body in a current operation state;
acquiring a second bending moment of the pile leg caused by the chord member phase difference in the current working state;
summing the first bending moment and the second bending moment to obtain an actual bending moment;
and comparing the actual bending moment with the bending moment threshold value and the second load with the pile leg load threshold value to forecast the working capacity of the current platform main body.
Further, the obtaining the phase difference between the first load and the chord member, which can be borne by each pile leg in the pre-pressing process, further includes:
obtaining the vertical load born by each chord in each pile leg in the pre-pressing process;
a chord load threshold is calculated for each of the chords based on the vertical load experienced by each of the chords.
Further, the obtaining the second load of the pile leg in the current working state includes:
obtaining the vertical load born by each chord in the pile leg;
and calculating the sum of all the vertical loads on the chords to obtain the second load.
Further, the obtaining the first bending moment of the pile leg caused by up-and-down guiding of the platform main body in the current working state includes:
the first bending moment is calculated according to the vertical load applied to each chord member and the distance between the chord members.
Further, the calculating the first bending moment according to the vertical load applied to each chord member and the distance between the chord members includes:
determining a vertical load bending moment caused by the chord load according to the vertical load born by each chord and the distance between the chords;
the first bending moment is calculated based on the vertical load bending moment and a correspondence between the vertical load bending moment and the first bending moment.
Further, the obtaining the second bending moment of the pile leg caused by the chord phase difference in the current working state includes:
measuring the chord member phase difference through a pile leg phase difference monitoring device;
and determining the second bending moment according to the chord member phase difference and the structural strength of the pile leg.
Further, the measuring the chord member phase difference by the leg phase difference monitoring device includes:
measuring the distance between the top end of each chord member and the top end of the lifting mechanism through a distance meter;
obtaining the maximum value and the minimum value of the distance between the top end of the chord member and the top end of the lifting mechanism;
and obtaining the chord phase difference by the difference between the maximum value and the minimum value of the distance between the top end of the chord and the top end of the lifting mechanism.
Further, the comparing the actual bending moment with the bending moment threshold value, and the second load with the leg load threshold value, to forecast the current working capacity of the platform main body, includes:
performing difference solving based on the actual bending moment and a bending moment threshold value;
performing a difference based on the second load and the leg load threshold;
and carrying out difference solving on the basis of the vertical load born by the current chord member and the chord member load threshold value so as to forecast the working capacity of the current platform main body.
Further, the method further comprises:
calculating the uc value of the leg based on the second load of the leg and the actual bending moment;
and when the uc value is greater than 1.0, an alarm is sent out.
In a second aspect, an embodiment of the present invention further provides a monitoring device for a jack-up platform, where the jack-up platform includes: the device comprises a plurality of truss type spud legs and a platform main body, wherein the platform main body is connected with each truss type spud leg in a one-to-one correspondence manner through a lifting mechanism, the truss type spud legs comprise a plurality of chords which are vertically arranged, and the device comprises:
the first acquisition module is used for acquiring a phase difference between a first load and a chord member, which are born by each pile leg in the pre-pressing process;
the pre-pressing module is used for calculating a pile leg load threshold value and a bending moment threshold value of the pile leg according to the first load of the pile leg and the chord member phase difference;
the second acquisition module is used for acquiring a second load of the pile leg in the current operation state;
the third acquisition module is used for acquiring a first bending moment of the pile leg caused by up-and-down guiding of the platform main body in the current operation state;
the fourth acquisition module is used for acquiring a second bending moment of the pile leg caused by the chord member phase difference in the current working state;
the summation module is used for summing the first bending moment and the second bending moment to obtain an actual bending moment;
and the forecasting module is used for comparing the actual bending moment with the bending moment threshold value and the second load with the pile leg load threshold value so as to forecast the working capacity of the platform main body at present.
In a third aspect, an embodiment of the present invention further provides an electronic device, including: a processor; and a memory in which computer program instructions are stored,
wherein the computer program instructions, when executed by the processor, cause the processor to perform the forecasting method of any one of the embodiments provided in the first aspect.
In a fourth aspect, an embodiment of the present invention further provides a computer readable storage medium, wherein the computer readable storage medium stores a computer program, which when executed by a processor, causes the processor to perform the forecasting method according to any one of the embodiments provided in the first aspect.
The technical scheme of the invention has at least one of the following beneficial effects:
according to the method for forecasting the working capacity of the self-elevating platform, the pre-pressing operation is carried out on the self-elevating platform, the load limit of the pile leg is obtained, real-time data in the working process is obtained, the working capacity of the main body of the current platform is forecasted based on the load limit, and the safety of the working of the self-elevating platform is guaranteed.
Drawings
FIG. 1 is a top view of a jack-up platform according to an embodiment of the present invention;
FIG. 2 is a side view of a jack-up platform in accordance with an embodiment of the present invention;
FIG. 3 is a top view of one truss leg of an embodiment of the invention;
fig. 4 is a schematic structural diagram of a pile leg lifting and pile leg phase difference monitoring device according to an embodiment of the present invention;
FIG. 5 is a flowchart of a method for forecasting the operation capability of a jack-up platform according to an embodiment of the present invention;
FIG. 6 is a block diagram of a device for forecasting the working capacity of a jack-up platform according to an embodiment of the present invention;
fig. 7 is a schematic diagram illustrating real-time monitoring of a device for forecasting operation capability of a jack-up platform according to an embodiment of the present invention.
Reference numerals:
1. a platform body; 2. a pile leg; 2A, a first pile leg; 2A1, chord number one; 2A2, chord number two; 2A3, chord III; 2B, second pile legs; 2C, a third pile leg; 2D, fourth pile leg; 4. a lifting mechanism; 5. pile leg phase difference monitoring device.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. It will be apparent that the described embodiments are some, but not all, embodiments of the invention. All other embodiments, which are obtained by a person skilled in the art based on the described embodiments of the invention, fall within the scope of protection of the invention.
As shown in fig. 1 to 4, the jack-up platform is a platform capable of freely lifting and lowering for realizing ocean resource development, and comprises pile legs 2, a platform main body 1 and a lifting mechanism 4, wherein the platform main body 1 is connected with each truss type pile leg 2 in a one-to-one correspondence manner through the lifting mechanism 4, the truss type pile legs 2 comprise a plurality of chords which are vertically arranged, the pile legs 2 extend downwards to the seabed, stand on the seabed, and lift the platform main body 1 by the pile legs 2 and enable the bottom of the platform main body 1 to leave a sea surface for a distance. Based on the operation requirement, the platform main body 1 is freely lifted by the lifting mechanism 4 so as to meet the operation requirement.
The jack-up platform in fig. 1 generally comprises three to six legs, including four legs, namely a first leg 2A, a second leg 2B, a third leg 2C and a fourth leg 2D, to carry the platform body. The platform body 1 in fig. 2 is distanced from the sea surface by the legs 2.
As shown in fig. 3, the leg of the triangular structure includes three chords, i.e., a first chord 2A1, a second chord 2A2, and a third chord 2A3, and the distance between adjacent chords is L. Each string rod is connected with the platform main body 1 through a lifting mechanism. That is, the platform body 1 is connected to the chord by the lifting mechanism, whereby lifting of the platform body 1 can be achieved by lifting of the lifting mechanism along the chord.
In one specific example, as shown in fig. 4, the lifting mechanism includes a plurality of lifting units, each chord bar is connected to a plurality of lifting units, and the lifting units include gears therein, and the gears are matched with racks on the chord bars.
A method for forecasting the working capacity of a jack-up platform according to an embodiment of the present invention is described in detail below with reference to the accompanying drawings.
Specifically, the method for forecasting the operation capability of the jack-up platform provided by the embodiment of the invention, as shown in fig. 5, comprises the following steps:
s1, obtaining a phase difference between a first load and a chord member, which are born by each pile leg in the pre-pressing process.
S2, calculating a pile leg load threshold and a bending moment threshold of the pile leg according to the first load of the pile leg and the chord member phase difference.
S3, obtaining a second load of the pile leg in the current working state.
S4, acquiring a first bending moment caused by up-and-down guiding of the pile leg on the platform main body in the current working state, and marking the first bending moment as M leg 2。
S5, obtaining a second bending moment of the pile leg caused by the chord member phase difference in the current working state, and marking the second bending moment as M leg 3。
And S6, summing the first bending moment and the second bending moment to obtain an actual bending moment.
Actual bending moment M Real world ＝M leg 2+M leg 3, since the first bending moment and the second bending moment are vectors, the summation here is a summation of two vectors, not a simple numerical summation.
S7, comparing the actual bending moment with the bending moment threshold value and comparing the second load with the pile leg load threshold value so as to forecast the working capacity of the platform main body at present.
That is, when the jack-up platform enters the working place, the jack-up platform needs to be pre-pressed in order to prevent the foundation from piercing during the subsequent work. In the pre-pressing operation process, a first load and chord member phase difference which can be born by the pile leg is obtained, and a pile leg load threshold and a bending moment threshold which can be born by the pile leg are calculated based on the first load and chord member phase difference and the self structural strength of the pile leg. Based on the second load and the actual bending moment born by the pile leg obtained in real time in the operation process, the pile leg load and the bending moment obtained in real time and in the pre-pressing operation are compared, so that the operation capability of the current platform main body is predicted, and the reality of the real-time state of the pile leg is improved.
The pre-compaction operation involves sequentially applying a high vertical load to the plurality of legs to stabilize the foundation. The maximum load that the leg can withstand is obtained during the pre-pressing process, and assuming that the pre-pressing loads of the four legs 2A, 2B, 2C and 2D in fig. 1 are PA, PB, PC, PD, respectively, the vertical load that the leg 2A receives cannot exceed PA, the vertical load that the leg 2B receives cannot exceed PB, the vertical load that the leg 2C receives cannot exceed PC, and the vertical load that the leg 2D receives cannot exceed PD during the subsequent operation.
In one embodiment, step S1 includes:
and S11, obtaining the vertical load born by each chord in each pile leg in the pre-pressing process.
And S12, calculating the chord load threshold of each chord based on the vertical load born by each chord.
That is, below the truss type leg, not only the total vertical load of the individual leg cannot exceed the specified value at pre-load, but also the load of the individual chord cannot exceed the capacity of the lifting mechanism. When the platform is subjected to external loads, such as environmental loads and crane working loads, extra loads are generated among the four legs, vertical loads are redistributed among the four legs, vertical loads among the four chords are redistributed, and single chord loads are further increased. Taking the 2A leg as an example, none of the three chords of the 2A leg can exceed the total load carrying capacity of the gear set on a single chord on that leg.
It should be noted that, when a certain vertical load is carried by the pile leg, the maximum bending moment that the pile leg can carry is determined, so that the capability of the vertical load and the bending moment that the platform receives during actual operation is also certain. When the vertical load becomes large, the bending moment that can be carried becomes small.
In one embodiment, in step S3, the method includes:
s31, obtaining the vertical load born by each chord in the pile leg.
For example, it is possible to collect the reception of each string bar by a sensor provided on the leg in the locked state of the platform body 1Vertical loading. Based on the different lifting principles of the lifting unit, the sensor can correspondingly adopt a torque sensor or a pressure sensor. The sensor is, for example, a torque sensor when the lifting unit is lifted by using an electric principle, and a pressure sensor when the lifting unit is lifted by using a hydraulic principle. Preferably, the detection value of the sensor in each lifting unit is obtained by using a sensor, each sensor is used for obtaining the vertical load of the internal gear of the corresponding lifting unit, and is marked as F1, F2 and F3 … fn, and each chord member is provided with a plurality of lifting units, namely, the vertical load born by each chord member is F chord ＝f1+f2+…+fn。
S32, calculating the sum of all the vertical loads born by the chords to obtain the second load.
The pile leg in the embodiment of the invention comprises three chords, wherein the three chords comprise a first chord, a second chord and vertical loads born on the third chord, are calculated according to the steps, and are respectively marked as F chord 1，F chord 2，F chord 3. The sum of the vertical loads on all chords of a single leg, i.e. the second load is F leg ＝F chord 1+F chord 2+F chord 3。
In one embodiment, in step S4, the method includes:
s41, calculating the first bending moment according to the vertical load born by each chord member and the distance between the chord members.
Further, a vertical load bending moment caused by the chord load is determined according to the vertical load received by each chord and the distance between the chords.
In one embodiment, the bending moment in the x-direction and the bending moment in the y-direction are calculated based on the vertical load received by each of the chords and the distance between the chords.
The bending moment in the x direction of the pile leg is recorded as M leg 1x，M leg 1x＝F chord 1*L*sin(60°)*2/3-(F chord 2+F chord 3)*L*sin(60°)/3。
Pile legThe bending moment in the y direction is denoted as M leg 1y，M leg 1y＝F chord 2*L/2-F chord 3*L/2。
The vertical load bending moment is calculated based on the bending moment in the x-direction and the bending moment in the y-direction.
The vertical load bending moment of the pile leg is recorded as M leg 1，M leg 1＝√(M leg 1x*M leg 1x+M leg 1y*M leg 1y)。
S42, calculating the first bending moment based on the vertical load bending moment and the corresponding relation between the vertical load bending moment and the first bending moment.
And corresponding to the truss type pile leg, a certain proportion is formed between a bending moment formed by chord load, namely a vertical load bending moment and a first bending moment caused by up-and-down guiding. The proportion, namely the corresponding relation, depends on the rigidity of the pile leg and the platform main body, and can be obtained through calculation and analysis in the design of the platform.
Thus, a first bending moment M leg 2＝M leg 1 (1+k), wherein k is a proportionality coefficient of a first bending moment and a vertical load bending moment which are bending moments guided up and down.
That is, the bending moment caused by up-down guiding can be determined by only collecting the vertical load and the pile leg design parameters.
In one embodiment, in step S5, the method includes:
s51, measuring the chord member phase difference through a pile leg phase difference monitoring device.
The jack-up platform may further comprise a leg phase difference monitoring device 5, the leg phase difference monitoring device 5 being arranged adjacent to the lifting mechanism 4. Leg phase difference monitoring means, i.e. RPD (RACK PHASE DIFFERENCE, rack height phase difference) monitoring means for monitoring the actual relative height between racks at the same theoretical level position on a plurality of chords on the leg. The chord members on the pile legs of the platform are stressed unevenly in the lifting process, so that different displacement amounts exist on racks on different chord members in the height direction.
It should be noted that: the pile leg phase difference monitoring device can detect pile leg bending moment in the lifting process, and the pile leg bending moment cannot be detected by the pile leg phase difference monitoring device after the platform is locked.
And S52, determining the second bending moment according to the chord member phase difference and the structural strength of the pile leg.
That is, the second bending moment M is calculated based on the RPD value obtained by the monitoring of the pile leg phase difference monitoring device and the structural strength of the pile leg leg 3。
In one embodiment, in step S51, the method includes:
s511, measuring the distance between each chord top end and the lifting mechanism top end through a distance meter.
S512, obtaining the maximum value and the minimum value of the distance between the top end of the chord member and the top end of the lifting mechanism.
And S513, obtaining the chord member phase difference by the difference between the maximum value and the minimum value of the distance between the top end of the chord member and the top end of the lifting mechanism.
The positions of the chords are monitored in real time through the laser range finders respectively arranged on the three chord lifting mechanisms, the distance from the topmost end of the chord to the top end of the lifting mechanism can be measured through the range finders, and the minimum value subtracted from the maximum value in the three distances is the RPD value of the spud leg.
In one embodiment, in step S7, the method includes:
and carrying out difference solving based on the actual bending moment and the bending moment threshold value.
And carrying out difference solving on the basis of the second load and the pile leg load threshold value.
And carrying out difference solving on the basis of the vertical load born by the current chord member and the chord member load threshold value so as to forecast the working capacity of the current platform main body.
That is, the actual bending moment and the second load of the pile leg detected in the working state and the vertical load received by the current chord are compared with the bending moment threshold value, the state load threshold value and the chord load threshold value detected in the pre-pressing state, so that the current stress state and the stress state of the pile leg and the chord are monitored in real time.
In an embodiment, the method further comprises:
based on the second load of the leg and the actual bending moment, the uc value of the leg is calculated.
And when the uc value is greater than 1.0, an alarm is sent out.
The uc value is the ratio of the stress value of the leg to the allowable value, and cannot exceed 1.0. For chords, the vertical load and bending moment affecting the uc values are used as part of the forecast data to more truly reflect the current leg and chord conditions.
The embodiment of the invention also provides a device for forecasting the operation capacity of the self-elevating platform, wherein the self-elevating platform comprises: the system comprises a plurality of truss type spuds and a platform main body, wherein the platform main body is connected with the truss type spuds in a one-to-one correspondence manner through a lifting mechanism, and the truss type spuds comprise a plurality of chords which are vertically arranged, as shown in fig. 6, a first acquisition module, a pre-pressing module, a second acquisition module, a third acquisition module, a fourth acquisition module, a summation module and a forecasting module.
The first acquisition module is used for acquiring a phase difference between a first load and a chord member, which are born by each pile leg in the pre-pressing process.
And the pre-pressing module is used for calculating a pile leg load threshold value and a bending moment threshold value of the pile leg according to the first load of the pile leg and the chord member phase difference.
The second acquisition module is used for acquiring a second load of the pile leg in the current operation state.
The third acquisition module is used for acquiring a first bending moment of the pile leg caused by up-and-down guiding of the platform main body in the current working state.
The fourth acquisition module is used for acquiring a second bending moment of the pile leg caused by the chord member phase difference in the current working state.
And the summation module is used for summing the first bending moment and the second bending moment to obtain an actual bending moment.
The forecasting module is used for comparing the actual bending moment with the bending moment threshold value and comparing the second load with the pile leg load threshold value so as to forecast the working capacity of the platform main body at present.
The forecasting device provided by the embodiment of the invention monitors the safe spud legs of the spud legs and the safe spud legs of the platform in real time, and can form the display effect shown in fig. 7 on the system, namely, the vertical load of the spud legs, namely, the second load, the first bending moment, the second bending moment, the rpd value, the uc value and the like are displayed in real time, and simultaneously, the vertical load of each chord on the spud legs, and the difference value, namely, the allowance of the chord load threshold and the vertical load of the chord are displayed in real time.
In an embodiment, the first acquisition module includes a first acquisition unit and a chord load threshold unit, where the first acquisition unit is configured to acquire a vertical load applied to each chord in each of the spud legs during the pre-compression.
The chord load threshold unit is used for calculating the chord load threshold of each chord based on the vertical load born by each chord.
In an embodiment, the third acquisition module comprises a first calculation unit for calculating the first bending moment according to the vertical load received by each chord and the distance between the chords.
In an embodiment, the first computing unit comprises a determining subunit and a corresponding subunit, the determining subunit being configured to determine a vertical load bending moment due to the chord load according to a vertical load to which each chord is subjected and a distance between the chords. The corresponding subunit is configured to calculate the first bending moment based on the vertical load bending moment and a correspondence between the vertical load bending moment and the first bending moment.
In an embodiment, the fourth acquisition module comprises a measurement unit for measuring the chord phase difference by means of a leg phase difference monitoring device and a determination unit. The determining unit is used for determining the second bending moment according to the chord member phase difference and the structural strength of the pile leg.
In an embodiment, the measuring unit comprises a measuring subunit, an acquiring subunit and a differencing subunit, wherein the measuring subunit is used for measuring the distance between each chord top end and the lifting mechanism top end through a distance meter. The acquisition subunit is used for acquiring the maximum value and the minimum value of the distance between the top end of the chord member and the top end of the lifting mechanism. And the difference solving subunit is used for obtaining the difference value between the maximum value and the minimum value of the distance between the top end of the chord member and the top end of the lifting mechanism, so as to obtain the chord member phase difference.
In an embodiment, the prediction module includes a first differencing unit, a second differencing unit, and a third differencing unit, where the first differencing unit is configured to difference based on the actual bending moment and a bending moment threshold. The second differencing unit is used for differencing based on the second load and the pile leg load threshold. The third differencing unit is used for differencing based on the vertical load born by the current chord member and the chord member load threshold value so as to forecast the working capacity of the current platform main body.
In an embodiment, the forecasting device further comprises a uc value module and an alarm module, wherein the uc value module is used for calculating the uc value of the pile leg based on the second load of the pile leg and the actual bending moment. And the alarm module is used for sending an alarm when the uc value is greater than 1.0.
The embodiment of the invention also provides electronic equipment, which comprises: a processor; and a memory in which computer program instructions are stored, wherein the computer program instructions, when executed by the processor, cause the processor to perform a method of forecasting job capability of a jack-up platform provided by any one of the embodiments described above.
The embodiment of the invention also provides a computer readable storage medium, wherein the computer readable storage medium stores a computer program, and when the computer program is executed by a processor, the processor is caused to execute the self-elevating platform operation capability forecasting method provided by any embodiment.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the present invention.
Claims (12)
1. A method for forecasting the working capacity of a jack-up platform, wherein the jack-up platform comprises: the method is characterized by comprising the following steps of:
acquiring the phase difference between a first load and a chord member, which can be born by each pile leg in the pre-pressing process;
according to the phase difference between the first load of the pile leg and the chord member, calculating a pile leg load threshold and a bending moment threshold of the pile leg;
acquiring a second load born by the pile leg in the current operation state;
acquiring a first bending moment of the pile leg caused by up-and-down guiding of the platform main body in a current operation state;
acquiring a second bending moment of the pile leg caused by the chord member phase difference in the current working state;
summing the first bending moment and the second bending moment to obtain an actual bending moment;
and comparing the actual bending moment with the bending moment threshold value and the second load with the pile leg load threshold value to forecast the working capacity of the current platform main body.
2. The method of claim 1, wherein said obtaining a first load to chord phase difference that each of said legs can withstand during pre-compression further comprises:
obtaining the vertical load born by each chord in each pile leg in the pre-pressing process;
a chord load threshold is calculated for each of the chords based on the vertical load experienced by each of the chords.
3. A forecasting method according to claim 2, characterized in that said obtaining the second load to which the leg is subjected in the current working state comprises:
obtaining the vertical load born by each chord in the pile leg;
and calculating the sum of all the vertical loads on the chords to obtain the second load.
4. A forecasting method according to claim 3, characterized in that said obtaining a first bending moment of the leg caused by up-and-down guiding of the platform body in the current working state comprises:
the first bending moment is calculated according to the vertical load applied to each chord member and the distance between the chord members.
5. A forecasting method according to claim 4, characterized in that said calculating said first bending moment from the vertical load each chord receives and the distance between said chords comprises:
determining a vertical load bending moment caused by the chord load according to the vertical load born by each chord and the distance between the chords;
the first bending moment is calculated based on the vertical load bending moment and a correspondence between the vertical load bending moment and the first bending moment.
6. A forecasting method according to claim 1, characterized in that said obtaining a second bending moment of the leg due to the chord phase difference in the current working condition comprises:
measuring the chord member phase difference through a pile leg phase difference monitoring device;
and determining the second bending moment according to the chord member phase difference and the structural strength of the pile leg.
7. A forecasting method according to claim 6, characterized in that said measuring said chord phase difference by a leg phase difference monitoring device comprises:
measuring the distance between the top end of each chord member and the top end of the lifting mechanism through a distance meter;
obtaining the maximum value and the minimum value of the distance between the top end of the chord member and the top end of the lifting mechanism;
and obtaining the chord phase difference by the difference between the maximum value and the minimum value of the distance between the top end of the chord and the top end of the lifting mechanism.
8. A forecasting method according to claim 3, characterized in that said comparing said actual bending moment with said bending moment threshold and said second load with said leg load threshold to forecast the current working capacity of said platform body comprises:
performing difference solving based on the actual bending moment and a bending moment threshold value;
performing a difference based on the second load and the leg load threshold;
and carrying out difference solving on the basis of the vertical load born by the current chord member and the chord member load threshold value so as to forecast the working capacity of the current platform main body.
9. A forecasting method according to claim 1, characterized in that the method further comprises:
calculating the uc value of the leg based on the second load of the leg and the actual bending moment;
and when the uc value is greater than 1.0, an alarm is sent out.
10. A jack-up platform work ability forecasting device, wherein the jack-up platform comprises: the device comprises a plurality of truss type spud legs and a platform main body, wherein the platform main body is connected with the truss type spud legs in a one-to-one correspondence manner through lifting mechanisms, and the truss type spud legs comprise a plurality of chords which are vertically arranged, and the device is characterized in that:
the first acquisition module is used for acquiring a phase difference between a first load and a chord member, which are born by each pile leg in the pre-pressing process;
the pre-pressing module is used for calculating a pile leg load threshold value and a bending moment threshold value of the pile leg according to the first load of the pile leg and the chord member phase difference;
the second acquisition module is used for acquiring a second load of the pile leg in the current operation state;
the third acquisition module is used for acquiring a first bending moment of the pile leg caused by up-and-down guiding of the platform main body in the current operation state;
the fourth acquisition module is used for acquiring a second bending moment of the pile leg caused by the chord member phase difference in the current working state;
the summation module is used for summing the first bending moment and the second bending moment to obtain an actual bending moment;
and the forecasting module is used for comparing the actual bending moment with the bending moment threshold value and the second load with the pile leg load threshold value so as to forecast the working capacity of the platform main body at present.
11. An electronic device, comprising: a processor; and a memory in which computer program instructions are stored,
wherein the computer program instructions, when executed by the processor, cause the processor to perform the forecasting method of any one of claims 1 to 9.
12. A computer readable storage medium, characterized in that the computer readable storage medium stores a computer program which, when executed by a processor, causes the processor to perform the forecasting method of any one of claims 1 to 9.
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| CN202310675742.3A CN116663191A (en) | 2023-06-08 | 2023-06-08 | Method and device for forecasting working capacity of jack-up platform, electronic equipment and storage medium |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310675742.3A CN116663191A (en) | 2023-06-08 | 2023-06-08 | Method and device for forecasting working capacity of jack-up platform, electronic equipment and storage medium |
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