CN109056850A - The monitoring method and monitoring system of the spud leg load of self-elevating ocean platform - Google Patents
The monitoring method and monitoring system of the spud leg load of self-elevating ocean platform Download PDFInfo
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- CN109056850A CN109056850A CN201810775401.2A CN201810775401A CN109056850A CN 109056850 A CN109056850 A CN 109056850A CN 201810775401 A CN201810775401 A CN 201810775401A CN 109056850 A CN109056850 A CN 109056850A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
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Abstract
The invention discloses a kind of monitoring method of the spud leg load of self-elevating ocean platform and monitoring systems, belong to field of ship equipment.In the full payload for acquiring all spud legs to remain static, and the torque value of the bottom end lifting unit according to each spud leg to remain static, the torque ratio of the total torque value of the torque value of the bottom end lifting unit for the spud leg that each remains static and the bottom end lifting unit of all spud legs to remain static can be obtained.The load for the spud leg that each remains static can be obtained according to the full payload of all spud legs to remain static and each torque ratio to remain static.This method can access the load for the spud leg being kept in motion, the load of each spud leg to remain static can also be obtained by obtaining the torque value of the bottom end lifting unit for the spud leg that each remains static simultaneously, therefore also not need the monitoring for spending biggish cost that the load to each spud leg of self-elevating ocean platform can be realized.
Description
Technical field
The present invention relates to field of ship equipment, the in particular to monitoring method and prison of the spud leg load of self-elevating ocean platform
Examining system.
Background technique
Self-elevating ocean platform is very widely used offshore rig, it mainly includes main platform body, Duo Gezhuan
Leg, jacking system, wherein jacking system for realizing main platform body lifting.The jacking system of existing self-elevating ocean platform
Usually gear rack lifting system, gear rack lifting system mainly include the lifter rack being fixed on spud leg and are fixed on
Multiple lifting units in main platform body.Lifting unit is by the pinion gear on transducer drive motor driven gear case, with stake
Rack gear on leg does gear motion, to realize elevating movement of the main platform body with respect to spud leg.
In order to obtain the load of each spud leg, typically now use two methods: one is in each lifting unit
Torque sensor is installed on lifting gear, the load of each spud leg is obtained according to the torque value that torque sensor on each spud leg exports
Lotus.But since torque sensor cost is high, if installing torque biography on the lifting gear of each lifting unit
Sense, then the cost that will lead to jacking system is substantially improved.It is another then read by frequency converter on each lifting unit
The torque of motor finally obtains the load of each spud leg.Although by frequency converter obtain the method cost of each spud leg load compared with
It is low, but due to needing the motor on lifting unit that can just obtain spud leg when being kept in motion and (spud leg being needed to keep movement)
Load, so by the method that frequency converter obtains the load of each spud leg be only applicable to measurement self-elevating ocean platform on be in
The load of the spud leg of motion state is then unable to measure the spud leg load of stationary state.
It can be seen that the method for the load of the above two common each state of acquisition is problematic in that, so existing
The method for obtaining the load of each spud leg is unable to satisfy requirement that is cheap and can measuring spud leg load under stationary state.
Summary of the invention
The embodiment of the invention provides a kind of monitoring method of the spud leg load of self-elevating ocean platform and monitoring system, energy
It is enough to realize the monitoring realized with lesser cost to the load of each spud leg of self-elevating ocean platform.The technical solution is as follows:
It is described the embodiment of the invention provides a kind of monitoring method of the spud leg load of rack-and-pinion self-elevating ocean platform
Monitoring method includes:
Obtain the full payload of self-elevating ocean platform；
Obtain the load for the spud leg that each is kept in motion；
According to the load of the full payload and all spud legs being kept in motion, all remain static is calculated
Spud leg full payload；
Obtain the torque value of the bottom end lifting unit for the spud leg that each remains static；
According to torque value described in each, the bottom end lifting unit for the spud leg that each remains static is calculated
The torque ratio of the total torque value of the bottom end lifting unit of torque value and all spud legs to remain static；
According to the full payload of the torque ratio and all spud legs to remain static, each is calculated and is in static
The load of the spud leg of state.
Optionally, the full payload for obtaining self-elevating ocean platform, comprising:
When all spud legs are kept in motion, the load of each spud leg is obtained；
According to the load of each spud leg, the full payload of the self-elevating ocean platform is calculated.
Optionally, described when all spud legs are kept in motion, obtain the load of each spud leg, comprising:
The movement velocity of each spud leg is identical with the direction of motion.
Optionally, the load for the spud leg that each is kept in motion is obtained, comprising:
The load on the lifting unit on the spud leg that each is kept in motion is obtained,
The load on the lifting unit on spud leg being kept in motion according to each, is calculated and is kept in motion
Spud leg load.
Optionally, by following formula, the load for the spud leg that each is kept in motion is calculated:
Fki=[(Tki × n)/R] × α,
Flegk=F1+F2+...+Fi,
Wherein, FkiThe load that lifting gear is born in i-th of lifting unit on the spud leg being kept in motion by k-th
Lotus, i, k are integer, and 4≤i, 3≤k；TkiThe electricity in i-th of lifting unit on the spud leg being kept in motion for k-th
The torque of machine；N is the transmission ratio of the lifting gear and motor in lifting unit；R is the radius of the reference circle of lifting gear；α is
The coefficient of friction of lifting unit；FlegkThe load that the spud leg being kept in motion by k-th is born.
Optionally, by following formula, the load for the spud leg that each remains static is calculated:
Wherein, F is the full payload of self-elevating ocean platform；FdbThe load that spud leg is born is moved for b-th；FjaIt is a-th
The load that the spud leg to remain static is born；M-th of bottom end lifting on the spud leg to remain static for a-th
The torque value of unit；A, b, m are integer, and 1≤a, 2≤b, 1 < m.
Optionally, the monitoring method further include:
When the load born on the lifting gear be more than the lifting gear maximum load and the duration be more than
The load born on 1min or the spud leg is more than the maximum value load of spud leg setting and the duration is more than
1min issues alarm signal and controls the rack-and-pinion self-elevating ocean platform and stop working.
The embodiment of the invention provides a kind of monitoring system of rack-and-pinion self-elevating ocean platform, the monitoring system packet
It includes:
First obtains module: for obtaining the full payload of self-elevating ocean platform；
Second obtains module: for obtaining the load for the spud leg that each is kept in motion；
First computing module: it for the load according to the full payload and all spud legs being kept in motion, calculates
To the full payload of all spud legs to remain static；
Third obtains module: for obtaining the torque value of the bottom end lifting unit for the spud leg that each remains static；
Second computing module: for each stake to remain static to be calculated according to torque value described in each
The torsion of the total torque value of the bottom end lifting unit of the torque value of the bottom end lifting unit of leg and all spud legs to remain static
Moment ratio；
Third computing module: it for the full payload according to the torque ratio and all spud legs to remain static, calculates
Obtain the load for the spud leg that each remains static.
Optionally, described first module is obtained for obtaining the load of each spud leg when all spud legs are kept in motion
Lotus, described first, which obtains module, includes the first computing unit, and first computing unit is used for the load according to each spud leg, meter
Calculation obtains the full payload of the self-elevating ocean platform.
Optionally, described second module is obtained for the movement velocity and movement in each spud leg being kept in motion
When direction is identical, the load for the spud leg that each is kept in motion is obtained.
Technical solution provided in an embodiment of the present invention has the benefit that in the total load for obtaining self-elevating ocean platform
After the load for the spud leg that lotus is kept in motion with each, the full payload of all spud legs to remain static can be acquired.
Meanwhile the torque value of the bottom end lifting unit according to each spud leg to remain static, each can be obtained and is in static
Total torsion of the bottom end lifting unit of the torque value of the bottom end lifting unit of the spud leg of state and all spud legs to remain static
The torque ratio of square value.It can according to the full payload of all spud legs to remain static and each torque ratio to remain static
Obtain the full payload for the spud leg that each remains static.The spud leg that this method can be kept in motion
Load, while each place can also be obtained by obtaining the torque value of the bottom end lifting unit for the spud leg that each remains static
In the load of the spud leg of stationary state, therefore do not need that biggish cost is spent to can be realized to each stake of self-elevating ocean platform yet
The monitoring of the load of leg.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described,
Fig. 1 is a kind of monitoring method flow chart of the spud leg load of self-elevating ocean platform provided in an embodiment of the present invention；
Fig. 2 is the monitoring method process of the spud leg load of another self-elevating ocean platform provided in an embodiment of the present invention
Figure；
Fig. 3 is a kind of monitoring system of self-elevating ocean platform provided in an embodiment of the present invention；
Fig. 4 is the monitoring system of another self-elevating ocean platform provided in an embodiment of the present invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is described in further detail.
Fig. 1 is a kind of monitoring method flow chart of the spud leg load of self-elevating ocean platform provided in an embodiment of the present invention,
As shown in Figure 1, the monitoring method includes:
Step S11: the full payload of self-elevating ocean platform is obtained.
Step S12: the load for the spud leg that each is kept in motion is obtained.
Step S13: it according to the load of full payload and all spud legs being kept in motion, is calculated all in static
The full payload of the spud leg of state.
Step S14: the torque value of the bottom end lifting unit for the spud leg that each remains static is obtained.
Step S15: according to each torque value, the bottom end lifting that the spud leg that each remains static is calculated is single
The torque ratio of the total torque value of the bottom end lifting unit of the torque value and all spud legs to remain static of member.
Step S16: according to the full payload of torque ratio and all spud legs to remain static, each is calculated and is in
The load of the spud leg of stationary state.
After the load for the spud leg that the full payload for obtaining self-elevating ocean platform is kept in motion with each, it can ask
Obtain the full payload of all spud legs to remain static.Meanwhile it being gone up and down according to the bottom end of each spud leg to remain static
The torque value of unit, the torque value that the bottom end lifting unit for the spud leg that each remains static can be obtained are in quiet with all
The only torque ratio of the total torque value of the bottom end lifting unit of the spud leg of state.According to total load of all spud legs to remain static
The full payload for the spud leg that each remains static can be obtained in lotus and each torque ratio to remain static.This method
The load for the spud leg that can be kept in motion, while can also be by obtaining each spud leg to remain static
The torque value of bottom end lifting unit obtain the load of each spud leg to remain static, therefore do not need to spend biggish yet
The monitoring of the load to each spud leg of self-elevating ocean platform can be realized in cost.
Fig. 2 is the monitoring method process of the spud leg load of another self-elevating ocean platform provided in an embodiment of the present invention
Figure, as shown in Fig. 2, the monitoring method includes:
Step S21: the full payload of self-elevating ocean platform is obtained.
Optionally, step S21 can include: when all spud legs are kept in motion, obtain the load of each spud leg, in turn
According to the load of each spud leg, the full payload of self-elevating ocean platform is calculated.The jack up sea obtained in this way
The full payload of foreign platform is more accurate, and the accuracy of the load of the finally obtained spud leg to remain static can be improved.
Optionally, the full payload of self-elevating ocean platform can be obtained by following formula in step S21:
F=Fleg1+Fleg2+...+Flegk(1),
Wherein, F is the full payload of self-elevating ocean platform；FlegkThe load for the spud leg being kept in motion for k-th；k
For integer, and 3≤k.Total load of platform when all spud legs are in motion state can be relatively easily obtained using above formula
Lotus.
Step S22: the load for the spud leg that each is kept in motion is obtained.
It wherein, is the survey when the movement velocity of each spud leg being kept in motion is identical with the direction of motion in step S22
The load of each spud leg being kept in motion obtained.The load of the spud leg being kept in motion obtained at this time is compared with subject to
Really, the accuracy of the load of the finally obtained spud leg to remain static can be improved.
Illustratively, step S22 can include:
Obtain the load on the lifting unit on the spud leg that each is kept in motion.
The load on the lifting unit on spud leg being kept in motion according to each, is calculated and is kept in motion
Spud leg load.This method can be relatively simple step accurately obtain the load of the spud leg that each is kept in motion
Lotus.It should be noted that obtained in step S21 the load on each spud leg process can in step S22.
Further, the load of each spud leg being kept in motion can be obtained by following formula:
Fki=[(Tki× n)/R] × α (2),
Flegk=F1+F2+...+Fi(3),
Wherein, FkiThe load that lifting gear is born in i-th of lifting unit on the spud leg being kept in motion by k-th
Lotus, i, k are integer, and 4≤i, 3≤k；TkiThe electricity in i-th of lifting unit on the spud leg being kept in motion for k-th
The torque of machine；N is the transmission ratio of the lifting gear and motor in lifting unit；R is the radius of the reference circle of lifting gear；α is
The coefficient of friction of lifting unit；FlegkThe load that the spud leg being kept in motion by k-th is born.Using above formula,
The influence of frictional force is eliminated when calculating the torque of lifting gear so that the torque value of finally obtained lifting gear more subject to
Really, it can be improved the accuracy for the result being finally calculated.
Wherein, the coefficient of friction of lifting unit meets following formula:
α=| ∑ Flegk-F/|/F/(4),
Wherein, ∑ FlegkThe full payload for the spud leg being kept in motion for k-th；F/For the reality of self-elevating ocean platform
Load；α is the coefficient of friction of lifting unit；K is integer, and 3≤k.
Carrying out test and calculating to the coefficient of friction of lifting unit, that rack-and-pinion self-elevating ocean platform can be improved is final
The accuracy of the result arrived.
Step S23: it according to the load of full payload and all spud legs being kept in motion, is calculated all in static
The full payload of the spud leg of state.
Step S24: the torque value of the bottom end lifting unit for the spud leg that each remains static is obtained.
Step S25: according to each torque value, the bottom end lifting that the spud leg that each remains static is calculated is single
The torque ratio of the total torque value of the bottom end lifting unit of the torque value and all spud legs to remain static of member.
Step S26: according to the full payload of torque ratio and all spud legs to remain static, each is calculated and is in
The load of the spud leg of stationary state.
Optionally, the process for the load for acquiring the spud leg that each remains static in step S23~step S26 can lead to
Following formula is crossed to obtain:
Wherein, F is the full payload of self-elevating ocean platform；FdbThe load that spud leg is born is moved for b-th；FjaIt is a-th
The load that the spud leg to remain static is born；M-th of bottom end lifting on the spud leg to remain static for a-th
The torque value of unit；A, b, m are integer, and 1≤a, 2≤b, 1 < m.It can relatively accurately be obtained often by above formula
The load of one spud leg to remain static.
It should be noted that the bottom end of the spud leg each to remain static is gone up and down in embodiment provided by the invention
Unit is arranged on the same position of each spud leg to remain static.
Step S27: by the full payload of self-elevating ocean platform, the load of each spud leg being kept in motion and each
The load of a spud leg to remain static is shown.
Optionally, by the load of the full payload of self-elevating ocean platform, each spud leg being kept in motion and often
After the load of one spud leg to remain static is shown, self-elevating ocean platform can be monitored convenient for staff
With control.
Further, can also total weight to self-elevating ocean platform, each spud leg being kept in motion bear
The weight that weight and each spud leg to remain static are born is shown.
Wherein,
M=F/g (6),
M is the total weight of self-elevating ocean platform；G is acceleration of gravity；
Mlegk=Flegk/ g (7),
MlegkThe weight that the spud leg being kept in motion by k-th is born；G is acceleration of gravity.
Mja=Fja/ g (8),
MjaThe weight that the spud leg to be remained static by a-th is born；gFor acceleration of gravity；A is integer, and 1≤a.
Self-elevating ocean platform can preferably be observed convenient for staff by showing to above data.
Optionally, which may also include that
When the load born on lifting gear be more than lifting gear maximum load and the duration be more than 1min, or
The load born on spud leg is more than the maximum value load of spud leg setting and the duration is more than 1min, issues alarm signal and controls
Rack-and-pinion self-elevating ocean platform processed stops working.This set can effectively protect self-elevating ocean platform, reduces accident hair
A possibility that raw.
Further, when the load born on lifting gear is more than 1.1 times of the maximum load of lifting gear and continues
Between more than the load born on 2s or spud leg be more than spud leg setting 1.1 times of maximum value load and the duration be more than 2s,
It issues alarm signal and controls rack-and-pinion self-elevating ocean platform and stop working.
Fig. 3 is a kind of monitoring system of rack-and-pinion self-elevating ocean platform provided in an embodiment of the present invention, such as Fig. 3 institute
Show, which includes:
First obtains module 11: for obtaining the full payload of self-elevating ocean platform.
Second obtains module 12: for obtaining the load for the spud leg that each is kept in motion.
First computing module 13: it for the load according to full payload and all spud legs being kept in motion, is calculated
The full payload of all spud legs to remain static.
Third obtains module 14: for obtaining the torque of the bottom end lifting unit for the spud leg that each remains static
Value.
Second computing module 15: for each spud leg to remain static to be calculated according to each torque value
Bottom end lifting unit torque value and all spud legs to remain static bottom end lifting unit total torque value torque
Than.
Third computing module 16: it for the full payload according to torque ratio and all spud legs to remain static, calculates
The load of the spud leg to remain static to each.
After the load for the spud leg that the full payload for obtaining self-elevating ocean platform is kept in motion with each, it can ask
Obtain the full payload of all spud legs to remain static.Meanwhile it being gone up and down according to the bottom end of each spud leg to remain static
The torque value of unit, the torque value that the bottom end lifting unit for the spud leg that each remains static can be obtained are in quiet with all
The only torque ratio of the total torque value of the bottom end lifting unit of the spud leg of state.According to total load of all spud legs to remain static
The full payload for the spud leg that each remains static can be obtained in lotus and each torque ratio to remain static.This method
The load for the spud leg that can be kept in motion, and only need to obtain the bottom end liter for the spud leg that each remains static
The load of each spud leg to remain static can be obtained in the torque value of drop unit, therefore does not also need to spend biggish cost
The monitoring of the load to each spud leg of self-elevating ocean platform can be realized.
Fig. 4 is the monitoring system of another rack-and-pinion self-elevating ocean platform provided in an embodiment of the present invention, such as Fig. 4 institute
Show, which includes:
First obtains module 21: for obtaining the full payload of self-elevating ocean platform.
First acquisition module 21 can be used for when all spud legs are kept in motion, and obtain the load of each spud leg, and first
Obtaining module includes the first computing unit 211, and the first computing unit 211 is used for the load according to each spud leg, is calculated certainly
The full payload of lift-type ocean platform.The full payload of the self-elevating ocean platform obtained in this way is more accurate, can be improved
The accuracy of the load of the finally obtained spud leg to remain static.
Wherein, self-elevating ocean platform can be obtained by formula (1), can relatively easily obtain rising certainly by formula (1)
The full payload of formula ocean platform.
Second obtains module 22: for obtaining the load for the spud leg that each is kept in motion.
Second acquisition module 22 is used for identical with the direction of motion in the movement velocity of each spud leg being kept in motion
When, obtain the load for the spud leg that each is kept in motion.The load of the spud leg being kept in motion obtained at this time is more
Accurately, the accuracy of the load of the finally obtained spud leg to remain static can be improved.
Second acquisition module 22 can first obtain the load on the lifting unit on the spud leg that each is kept in motion.The
It may include the second computing unit 221 in two acquisition modules 22, what the second computing unit 221 can be kept in motion according to each
The load on lifting unit on spud leg, is calculated the load for the spud leg being kept in motion.
Specifically, the second acquisition module 22 can obtain often according to the data of the frequency converter on the motor of each lifting unit
The torque of motor in a lifting unit, and then the load of each lifting unit is obtained by the second computing unit 221.
Optionally, the load of each spud leg being kept in motion can be realized by formula (2)~(3), formula (2)~
(3) influence that frictional force is eliminated when calculating the torque of lifting gear, so that the torque value of finally obtained lifting gear is more
Be it is accurate, can be improved the accuracy for the result being finally calculated.
First computing module 23: it for the load according to full payload and all spud legs being kept in motion, is calculated
The full payload of all spud legs to remain static.
Third obtains module 24: for obtaining the torque of the bottom end lifting unit for the spud leg that each remains static
Value.
Second computing module 25: for each spud leg to remain static to be calculated according to each torque value
Bottom end lifting unit torque value and all spud legs to remain static bottom end lifting unit total torque value torque
Than.
Third computing module 26: it for the full payload according to torque ratio and all spud legs to remain static, calculates
The load of the spud leg to remain static to each.
The process carried out in first 23~third of computing module computing module 26 can be realized by formula (5), pass through formula
(5) load for the spud leg that each remains static can relatively accurately be obtained.
Display module 27: for by the load of the full payload of self-elevating ocean platform, each spud leg being kept in motion
The load of lotus and each spud leg to remain static is shown.
By the full payload of self-elevating ocean platform, the load of each spud leg being kept in motion and each be in it is quiet
Only the load of the spud leg of state is shown, self-elevating ocean platform can be monitored and be controlled convenient for staff.
Optionally, display module 27 can also total weight to self-elevating ocean platform, each stake being kept in motion
The weight that leg is born and the weight that the spud leg that each remains static is born are shown.
Wherein, the total weight of self-elevating ocean platform, each spud leg for being kept in motion are born weight and each
The weight that a spud leg to remain static is born can pass through respectively formula (6)~(8) and obtain.Formula (6) can divide with formula (7)
It is not completed in the first computing unit 211 and the second computing unit 221, formula (8) can be completed in third computing module 26.
As shown in figure 4, the monitoring system may also include alarm module 28, alarm module 28 on lifting gear for being held
The load received is more than the maximum load of lifting gear and the duration is more than the load born on 1min or spud leg more than stake
The maximum value load and duration that leg is set are more than 1min, and alarm module 28 issues alarm signal and simultaneously controls rack-and-pinion from liter
Formula ocean platform stops working.
Optionally, when the load born on lifting gear is more than 1.1 times of the maximum load of lifting gear and duration
More than the load born on 2s or spud leg be more than 1.1 times of the maximum value load of spud leg setting and the duration is more than 2s, report
Alert module 28 issues alarm signal and controls rack-and-pinion self-elevating ocean platform and stops working.
The load for the spud leg that this method can be kept in motion, and only needed in stake on self-elevating ocean platform
Increase on the bottom end lifting unit of leg and several torque sensors are installed, opposite needs are every on the spud leg of self-elevating ocean platform
The method for the load for being respectively mounted torque sensor on one lifting unit and then obtaining spud leg greatly reduces cost.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of monitoring method of the spud leg load of self-elevating ocean platform, which is characterized in that the monitoring method includes:
Obtain the full payload of self-elevating ocean platform；
Obtain the load for the spud leg that each is kept in motion；
According to the load of the full payload and all spud legs being kept in motion, all stakes to remain static are calculated
The full payload of leg；
Obtain the torque value of the bottom end lifting unit for the spud leg that each remains static；
According to torque value described in each, the torque of the bottom end lifting unit for the spud leg that each remains static is calculated
The torque ratio of the total torque value of the bottom end lifting unit of value and all spud legs to remain static；
According to the full payload of the torque ratio and all spud legs to remain static, each is calculated and remains static
Spud leg load.
2. monitoring method according to claim 1, which is characterized in that the full payload for obtaining self-elevating ocean platform,
Include:
When all spud legs are kept in motion, the load of each spud leg is obtained；
According to the load of each spud leg, the full payload of the self-elevating ocean platform is calculated.
3. monitoring method according to claim 1, which is characterized in that it is described when all spud legs are kept in motion, it obtains
Take the load of each spud leg, comprising:
The movement velocity of each spud leg is identical with the direction of motion.
4. monitoring method according to claim 1, which is characterized in that obtain the load for the spud leg that each is kept in motion
Lotus, comprising:
The load on the lifting unit on the spud leg that each is kept in motion is obtained,
The load on the lifting unit on spud leg being kept in motion according to each, is calculated the stake being kept in motion
The load of leg.
5. monitoring method according to claim 4, which is characterized in that by following formula, each is calculated and is in
The load of the spud leg of motion state:
Fki=[(Tki× n)/R] × α,
Flegk=F1+F2+...+Fi,
Wherein, FkiThe load that lifting gear is born in i-th of lifting unit on the spud leg being kept in motion by k-th,
I, k is integer, and 4≤i, 3≤k；TkiThe motor in i-th of lifting unit on the spud leg being kept in motion for k-th
Torque；N is the transmission ratio of the lifting gear and motor in lifting unit；R is the radius of the reference circle of lifting gear；α is to rise
The coefficient of friction of unit drops；FlegkThe load that the spud leg being kept in motion by k-th is born.
6. monitoring method according to claim 1, which is characterized in that by following formula, each is calculated and is in
The load of the spud leg of stationary state:
Wherein, F is the full payload of self-elevating ocean platform；FdbThe load that spud leg is born is moved for b-th；FjaIt is in for a-th
The load that the spud leg of stationary state is born；M-th of bottom end lifting unit on the spud leg to remain static for a-th
Torque value；A, b, m are integer, and 1≤a, 2≤b, 1 < m.
7. monitoring method according to claim 1, which is characterized in that the monitoring method further include:
When the load born on the lifting gear be more than the lifting gear maximum load and the duration be more than 1min,
Or the load born on the spud leg is more than the maximum value load of spud leg setting and the duration is more than 1min, issues
Alarm signal simultaneously controls the rack-and-pinion self-elevating ocean platform and stops working.
8. a kind of monitoring system of self-elevating ocean platform, which is characterized in that the monitoring system for realizing claim 1~
Monitoring method described in 7, the monitoring system include:
First obtains module: for obtaining the full payload of self-elevating ocean platform；
Second obtains module: for obtaining the load for the spud leg that each is kept in motion；
First computing module: for the load according to the full payload and all spud legs being kept in motion, institute is calculated
There is the full payload of the spud leg to remain static；
Third obtains module: for obtaining the torque value of the bottom end lifting unit for the spud leg that each remains static；
Second computing module: for the spud leg that each remains static to be calculated according to torque value described in each
The torque ratio of the total torque value of the bottom end lifting unit of the torque value of bottom end lifting unit and all spud legs to remain static；
Third computing module: it for the full payload according to the torque ratio and all spud legs to remain static, is calculated
The load of each spud leg to remain static.
9. the monitoring system of self-elevating ocean platform according to claim 8, which is characterized in that
Described first, which obtains module, is used for when all spud legs are kept in motion, and obtains the load of each spud leg, and described first
Obtaining module includes the first computing unit, and first computing unit is used for the load according to each spud leg, is calculated described
The full payload of self-elevating ocean platform.
10. the monitoring system of self-elevating ocean platform according to claim 8, which is characterized in that described second obtains mould
Block is used for when the movement velocity of each spud leg being kept in motion is identical with the direction of motion, is obtained each and is in movement
The load of the spud leg of state.
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| CN109056850B (en) | 2020-12-15 |
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