Method and device for monitoring a jack-up platform, electronic equipment and storage medium

Abstract

The application provides a monitoring method and device for a self-elevating platform, an electronic device and a storage medium, and the monitoring method comprises the following steps: S1, acquiring a first bending moment caused by the up and down guiding of a platform body by a pile leg; S2, acquiring a second bending moment caused by a phase difference of a chord; and S3, monitoring the pile leg based on the first bending moment and the second bending moment. According to the monitoring method, the second bending moment of the pile leg in the climbing process and the first bending moment caused by the up and down guiding of the platform body by the pile leg in the platform locking state are comprehensively considered, the state of the pile leg is more truly reflected based on the detection of the first bending moment and the second bending moment of the pile leg in the two states, and the safety of the platform is further improved.

Description

Technical Field

[0001] This invention relates to the field of self-elevating platforms, and more particularly to monitoring methods and devices, electronic devices, and storage media for self-elevating platforms. Background Technology

[0002] Jack-up platforms are essential equipment for marine resource development, such as jack-up drilling rigs for oil and gas extraction, jack-up construction platforms for offshore wind power equipment installation, and dedicated jack-up accommodation platforms.

[0003] Generally, jack-up platforms have three to six legs. Due to the uncertainty of seabed geological conditions and environmental loads, the structural safety of jack-up platforms can be directly affected by the slippage of the legs or excessive environmental loads during operation. In extreme cases, the platform legs may break, leading to the overturning of the platform. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a monitoring method for a self-elevating platform, which can monitor the condition of the pile legs in real time.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] In a first aspect, according to an embodiment of the present invention, a monitoring method for a self-elevating platform includes: multiple truss-type legs and a platform body, wherein the platform body is connected to each of the truss-type legs one-to-one via a lifting mechanism, and each truss-type leg includes multiple vertically arranged chords; the method includes the following steps:

[0007] S1, obtain the first bending moment caused by the vertical guidance of the pile leg on the platform body;

[0008] S2, obtain the second bending moment of the pile leg caused by the phase difference of the chord;

[0009] S3, based on the first bending moment and the second bending moment, monitor the pile leg.

[0010] Furthermore, in step S1, a first load applied to the pile leg is obtained, and in step S3, the pile leg is monitored based on the first load, the first bending moment, and the second bending moment.

[0011] Furthermore, step S1 includes:

[0012] S11, Obtain the vertical load on each chord in the pile leg;

[0013] S12, calculate the sum of the vertical loads on all the chords to obtain the first load;

[0014] S13, calculate the first bending moment based on the vertical load on each chord and the distance between the chords.

[0015] Furthermore, step S13 includes:

[0016] S131, determine the vertical load bending moment caused by the chord load based on the vertical load on each chord and the distance between the chords;

[0017] S132, Calculate the first bending moment based on the vertical load bending moment and the correspondence between the vertical load bending moment and the first bending moment.

[0018] Furthermore, step S131 includes:

[0019] Calculate the bending moment in the x-direction and the bending moment in the y-direction based on the vertical load on each chord and the distance between the chords.

[0020] The vertical load bending moment is calculated based on the bending moment in the x-direction and the bending moment in the y-direction.

[0021] Furthermore, in step S132, the correspondence is determined based on the stiffness of the platform body and the pile legs.

[0022] Furthermore, step S2 includes:

[0023] S21, the phase difference of the chord is detected by the pile leg phase difference monitoring device;

[0024] S22, determine the second bending moment based on the phase difference of the chord and the structural strength of the pile leg.

[0025] Furthermore, step S3 includes:

[0026] The actual bending moment is obtained by summing the first bending moment and the second bending moment.

[0027] An alarm is triggered when the actual bending moment and / or the first load exceeds the corresponding preset threshold.

[0028] Secondly, embodiments of the present invention also provide a monitoring device for a self-elevating platform, wherein the self-elevating platform includes: multiple truss-type legs and a platform body, the platform body being connected one-to-one to each of the truss-type legs via a lifting mechanism, each truss-type leg including multiple vertically arranged chords, and the device including:

[0029] The first acquisition module is used to acquire the first bending moment caused by the vertical guidance of the pile leg to the platform body;

[0030] The second acquisition module is used to acquire the second bending moment of the pile leg caused by the phase difference of the chord;

[0031] A monitoring module is used to monitor the pile leg based on the first bending moment and the second bending moment.

[0032] Thirdly, embodiments of the present invention also provide an electronic device, characterized in that it includes: a processor; and a memory, wherein computer program instructions are stored in the memory.

[0033] When the computer program instructions are executed by the processor, the processor performs the monitoring method described in any embodiment of the first aspect.

[0034] Fourthly, embodiments of the present invention also provide 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 monitoring method described in any embodiment of the first aspect.

[0035] The above-described technical solution of the present invention has at least one of the following beneficial effects:

[0036] The present invention discloses a monitoring method for a self-elevating platform. This monitoring method uses a rack height phase difference detection device to detect the second bending moment of the legs during the climbing process, and uses multiple sensors to detect the first bending moment of the legs caused by the vertical guidance of the platform body when the platform is locked. Based on the detection of the first and second bending moments of the legs in the two states, the method can more realistically reflect the state of the legs and further improve the safety of the platform. Attached Figure Description

[0037] Figure 1 This is a top view of the self-elevating platform in an embodiment of the present invention;

[0038] Figure 2 This is a side view of the self-elevating platform in an embodiment of the present invention;

[0039] Figure 3 This is a top view of a truss-type pile leg in an embodiment of the present invention;

[0040] Figure 4 This is a schematic diagram of the structure of the lifting pile leg and pile leg phase difference monitoring device in an embodiment of the present invention;

[0041] Figure 5 A flowchart illustrating the monitoring method for a self-elevating platform provided in an embodiment of the present invention;

[0042] Figure 6 A flowchart illustrating a monitoring method for a self-elevating platform according to an embodiment of the present invention;

[0043] Figure 7 A flowchart illustrating a monitoring method for a self-elevating platform according to an embodiment of the present invention;

[0044] Figure 8 A schematic diagram of a monitoring method for a self-elevating platform provided in an embodiment of the present invention;

[0045] Figure 9 This is a block diagram of a monitoring device for a self-elevating platform provided in an embodiment of the present invention.

[0046] Figure label:

[0047] 1. Platform body; 2. Pile legs; 2A. First pile leg; 2A1. First chord; 2A2. Second chord; 2A3. Third chord; 2B. Second pile leg; 2C. Third pile leg; 2D. Fourth pile leg; 4. Lifting mechanism; 5. Pile leg phase difference monitoring device. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention are within the scope of protection of the present invention.

[0049] like Figures 1 to 4 As shown, a jack-up platform is a type of platform capable of freely rising and falling, used for marine resource development. The jack-up platform includes legs 2, a platform body 1, and a lifting mechanism 4. The platform body 1 is connected one-to-one to each of the truss-type legs 2 via the lifting mechanism 4. Each truss-type leg 2 includes multiple vertically arranged chords. The legs 2 extend to the seabed, standing upright on the seabed, and support the platform body 1, raising its bottom a certain distance above the sea surface. Based on operational requirements, the lifting mechanism 4 enables the platform body 1 to rise and fall freely to meet operational needs.

[0050] A jack-up platform typically consists of three to six legs. Figure 1 The self-elevating platform in the middle includes four pile legs, namely the first pile leg 2A, the second pile leg 2B, the third pile leg 2C and the fourth pile leg 2D, which support the main body of the platform. Figure 2 The main body of the platform 1 is lifted off the sea surface by a certain distance under the action of the pile legs 2.

[0051] like Figure 3As shown, the triangular structure of the pile legs includes three chords: chord 1 (2A1), chord 2 (2A2), and chord 3 (2A3), with a distance L between adjacent chords. Each chord is connected to the platform body 1 via a lifting mechanism. In other words, the platform body 1 is connected to the chord via the lifting mechanism, thus allowing the platform body 1 to rise and fall along the chord via the lifting mechanism.

[0052] In a specific example, such as Figure 4 As shown, the lifting mechanism includes multiple lifting units, each chord is connected to multiple lifting units, and each lifting unit includes a gear, which matches the rack on the chord.

[0053] The following describes in detail, with reference to the accompanying drawings, a monitoring method for a self-elevating platform according to an embodiment of the present invention.

[0054] Specifically, the present invention provides a monitoring method for a self-elevating platform, such as... Figure 5 As shown, it includes the following steps:

[0055] S1, obtain the first bending moment caused by the vertical guidance of the pile leg on the platform body.

[0056] S2, obtain the second bending moment of the pile leg caused by the phase difference of the chord.

[0057] S3, based on the first bending moment and the second bending moment, monitor the pile leg.

[0058] In other words, by monitoring the first bending moment caused by the vertical guidance of the platform body when the platform is locked, and the second bending moment caused by the phase difference of the chord when the platform is climbing, the stress distribution of the pile leg can be monitored by comprehensively considering the first bending moment and the second bending moment, which can more realistically reflect the condition of the pile leg.

[0059] In one embodiment, in step S1, a first load applied to the pile leg is also obtained, wherein in step S3, the pile leg is monitored based on the first load, the first bending moment, and the second bending moment.

[0060] In other words, the condition of the pile leg is monitored not only based on the first bending moment and the second bending moment, but also through the first load. By monitoring the stress distribution of the pile leg and further monitoring its load, the condition of the pile leg can be reflected more accurately.

[0061] In one embodiment, such as Figure 6 As shown, step S1 includes:

[0062] S11, obtain the vertical load on each of the chords in the pile leg.

[0063] For example, with the platform body 1 in a locked state, sensors mounted on the pile legs can be used to collect the vertical load on each chord. Depending on the lifting principle of the lifting unit, the sensors can be torque sensors or pressure sensors. When the lifting unit uses an electric principle for lifting, a torque sensor is used, for example; when the lifting unit uses a hydraulic principle for lifting, a pressure sensor is used, for example. Preferably, the sensors acquire the detection values ​​of the sensors within each lifting unit. Each sensor is used to acquire the vertical load of the gear within the corresponding lifting unit, denoted as f1, f2, f3…fn. Each chord has multiple lifting units, meaning the vertical load on each chord is F. chord = f1 + f2 + ... + fn.

[0064] S12, calculate the sum of the vertical loads on all the chords to obtain the first load.

[0065] In this embodiment of the invention, the pile leg includes three chord members: chord member 1, chord member 2, and chord member 3. The vertical loads on these three chord members are calculated separately according to the steps described above and denoted as F. chord 1, F chord 2, F chord 3. Therefore, the sum of the vertical loads on all chords of a single pile leg, which is also the first load mentioned above, is F. leg =F chord 1+F chord 2+F chord 3.

[0066] S13, calculate the first bending moment based on the vertical load on each chord and the distance between the chords.

[0067] In one embodiment, such as Figure 7 As shown, step S13 includes:

[0068] S131, determine the vertical load bending moment caused by the chord load based on the vertical load on each chord and the distance between the chords.

[0069] 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 on each chord and the distance between the chords.

[0070] The bending moment of the pile leg in the x direction is denoted 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.

[0071] The bending moment of the pile leg in the y direction is denoted as M. leg 1y, M leg 1y=F chord 2*L / 2-F chord 3*L / 2.

[0072] The vertical load bending moment is calculated based on the bending moment in the x-direction and the bending moment in the y-direction.

[0073] The vertical load bending moment of the pile leg is denoted as M. leg 1, M leg 1 = √(M) leg 1x*M leg 1x+M leg 1y*M leg 1y).

[0074] S132, Calculate the first bending moment based on the vertical load bending moment and the correspondence between the vertical load bending moment and the first bending moment.

[0075] For truss-type pile legs, the bending moment caused by the chord load (i.e., the vertical load bending moment) and the first bending moment caused by the upper and lower guides are in a certain proportion. This proportion, or correspondence, depends on the stiffness of the pile legs and the platform body, and can be obtained through calculation and analysis during the platform design.

[0076] Therefore, the first bending moment is denoted as M. leg 2, M leg 2 = M leg 1*(1+k), where k is the ratio coefficient of the bending moment of the upper and lower guides, i.e. the first bending moment, to the bending moment of the vertical load.

[0077] In other words, as long as the vertical load and pile leg design parameters are collected, the bending moment caused by the upper and lower guides can be determined.

[0078] In one embodiment, step S2 includes:

[0079] S21, the phase difference of the chord is detected by the pile leg phase difference monitoring device.

[0080] The self-elevating platform may also include a leg phase difference monitoring device 5, which is arranged adjacent to the lifting mechanism 4. The leg phase difference monitoring device, also known as the RPD (Rack Phase Difference) monitoring device, is used to monitor the actual relative height between racks at the same theoretical horizontal height position on multiple chords of the leg. During the platform's lifting process, the chords on the leg experience uneven stress, causing different displacements of the racks on different chords in the height direction.

[0081] It should be noted that the pile leg phase difference monitoring device can detect the pile leg bending moment during the lifting process, but it cannot be used to detect the pile leg bending moment after the platform is locked.

[0082] S22, determine the second bending moment based on the phase difference of the chord and the structural strength of the pile leg.

[0083] In other words, the second bending moment, denoted as M, is obtained based on the RPD value monitored by the pile leg phase difference monitoring device and the structural strength calculation of the pile leg. leg 3.

[0084] In one embodiment, such as Figure 8 As shown, step S3 includes:

[0085] The actual bending moment is obtained by summing the first bending moment and the second bending moment.

[0086] In other words, the actual bending moment M 实 =M leg 2+M leg 3. It should be noted here that since both the first bending moment and the second bending moment are vectors, the summation here is the summation of two vectors, not a simple numerical summation.

[0087] An alarm is triggered when the actual bending moment and / or the first load exceeds the corresponding preset threshold.

[0088] In other words, when the actual bending moment M 实 First load F leg If any of the conditions exceeds its corresponding threshold, a dangerous situation is detected, and an alarm will be triggered to alert the crew.

[0089] The bending moment threshold and the first load threshold can be set according to the stiffness of the pile leg and the platform, respectively, or they can be set according to historical experience data.

[0090] The pile leg status monitoring method provided in this embodiment of the invention can more realistically reflect the pile leg status by monitoring the bending moment of the pile leg in the platform locked state and the bending moment of the pile leg in the lifting state, thereby further improving the safety of the lifting platform.

[0091] This invention also provides a monitoring device for a self-elevating platform, such as... Figure 9 As shown, the self-elevating platform includes: multiple truss-type pile legs and a platform body. The platform body is connected to each of the truss-type pile legs one by one through a lifting mechanism. Each truss-type pile leg includes multiple vertically arranged chords. The device includes a first acquisition module, a second acquisition module, and a monitoring module.

[0092] The first acquisition module is used to acquire the first bending moment caused by the vertical guidance of the pile leg on the platform body.

[0093] The second acquisition module is used to acquire the second bending moment of the pile leg caused by the phase difference of the chord.

[0094] The monitoring module is used to monitor the pile leg based on the first bending moment and the second bending moment.

[0095] In one embodiment, the first acquisition module includes an acquisition unit for acquiring a first load applied to the pile leg. The monitoring module includes a monitoring unit for monitoring the pile leg based on the first load, a first bending moment, and a second bending moment.

[0096] In one embodiment, the first acquisition module includes a second acquisition unit, a first load unit, and a first bending moment unit.

[0097] The second acquisition unit is used to acquire the vertical load on each chord in the pile leg.

[0098] The first load unit is used to calculate the sum of the vertical loads on all the chords to obtain the first load.

[0099] The first bending moment unit is used to calculate the first bending moment based on the vertical load on each of the chords and the distance between the chords.

[0100] In one embodiment, the first bending moment unit includes a determining sub-unit and a calculating sub-unit.

[0101] The determining subunit is used to determine the vertical load bending moment caused by the chord load based on the vertical load on each chord and the distance between the chords.

[0102] The calculation subunit is used to calculate the first bending moment based on the vertical load bending moment and the correspondence between the vertical load bending moment and the first bending moment.

[0103] This invention also provides an electronic device, including: a processor; and a memory, wherein computer program instructions are stored in the memory, wherein when the computer program instructions are executed by the processor, the processor causes the processor to perform a monitoring method for a self-elevating platform provided in any of the above embodiments.

[0104] This invention also provides a computer-readable storage medium storing a computer program. When the computer program is run by a processor, the processor executes a monitoring method for a self-elevating platform provided in any of the above embodiments.

[0105] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method of monitoring a jack-up platform, wherein, The self-elevating platform comprises a plurality of truss legs and a platform body, the platform body is connected to each of the truss legs one by one through a lifting mechanism, and the truss leg comprises a plurality of vertical chord bars, characterized in that the method comprises the following steps: S1, obtaining a first bending moment of the leg caused by the up and down guiding of the platform body; S2, obtaining a second bending moment of the leg caused by the phase difference of the chord bars; S3, monitoring the leg based on the first bending moment and the second bending moment.

2. The monitoring method according to claim 1, characterized in that, In the step S1, a first load applied to the leg is also obtained, and in the step S3, the leg is monitored based on the first load, the first bending moment and the second bending moment.

3. The monitoring method according to claim 2, characterized in that, The step S1 comprises: S11, obtaining the vertical load borne by each chord bar in the leg; S12, calculating the sum of the vertical loads borne by all the chord bars to obtain the first load; S13, calculating the first bending moment according to the vertical load borne by each chord bar and the distance between the chord bars.

4. The monitoring method according to claim 3, characterized in that, The step S13 comprises: S131, determining the vertical load bending moment caused by the chord load according to the vertical load borne by each chord bar and the distance between the chord bars; S132, calculating the first bending moment based on the vertical load bending moment and the corresponding relationship between the vertical load bending moment and the first bending moment.

5. The monitoring method of claim 4, wherein, The step S131 comprises: calculating the bending moment in the x direction and the bending moment in the y direction respectively according to the vertical load borne by each chord bar and the distance between the chord bars; calculating the vertical load bending moment based on the bending moment in the x direction and the bending moment in the y direction.

6. The monitoring method according to claim 5, characterized in that, In the step S132, the corresponding relationship is determined according to the rigidity of the platform body and the leg.

7. The monitoring method of claim 2, wherein, The step S2 comprises: S21, detecting the phase difference of the chord bars by a leg phase difference monitoring device; S22, determining the second bending moment according to the phase difference of the chord bars and the structural strength of the leg.

8. The monitoring method of claim 2, wherein, The step S3 comprises: summing the first bending moment and the second bending moment to obtain an actual bending moment, when the actual bending moment and / or the first load exceeds a corresponding preset threshold, an alarm is given.

9. A monitoring device for a jack-up platform, wherein, The self-elevating platform comprises a plurality of truss legs and a platform body, the platform body is connected to each of the truss legs one by one through a lifting mechanism, and the truss leg comprises a plurality of vertical chord bars, characterized in that the device comprises: a first obtaining module for obtaining a first bending moment of the leg caused by the up and down guiding of the platform body; a second obtaining module for obtaining a second bending moment of the leg caused by the phase difference of the chord bars; a monitoring module for monitoring the leg based on the first bending moment and the second bending moment.

10. An electronic device, comprising: comprises: a processor; and a memory, in which a computer program instruction is stored, wherein when the computer program instruction is run by the processor, the processor executes the monitoring method as claimed in any one of claims 1 to 8.

11. A computer readable storage medium, characterized in that, The computer readable storage medium stores a computer program, and the computer program, when executed by a processor, causes the processor to perform the monitoring method according to any one of claims 1 to 8.

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