CN113514223A - Floating platform pilot test motion simulation device and control method - Google Patents
Floating platform pilot test motion simulation device and control method Download PDFInfo
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- CN113514223A CN113514223A CN202010275550.XA CN202010275550A CN113514223A CN 113514223 A CN113514223 A CN 113514223A CN 202010275550 A CN202010275550 A CN 202010275550A CN 113514223 A CN113514223 A CN 113514223A
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Abstract
The invention discloses a floating platform pilot test motion simulation device which comprises a test platform, a test body, a force application assembly, a counterweight assembly and an electric control cabinet, wherein the test platform is provided with a test groove which is hollow inside and has an open structure at the top; the test body is floated in the test groove through the flexible connecting piece, one end of the flexible connecting piece is connected with the counterweight assembly, and the other end of the flexible connecting piece is connected with the force application assembly; the electric control cabinet is electrically connected with the force application assembly to control the movement of the force application assembly. The invention also discloses a control method of the floating platform pilot test motion simulation device. The pilot test motion simulation device has simple structure and convenient operation, can accurately and equivalently simulate the single-degree-of-freedom swinging motion of the floating ocean platform under the actual sea condition, and can also simulate the coupling motion of multiple degrees of freedom of the platform under the inherent motion frequency of the platform.
Description
Technical Field
The invention relates to the technical field of floating ocean platforms, in particular to a floating platform pilot test motion simulation device and a control method.
Background
In recent years, with the national trend to deep sea, a large amount of floating ocean platforms emerge and become an important door of current high and new technology equipment of ocean engineering, the supply demand of domestic ocean platforms is increased rapidly, the development technology and demand of ocean oil and gas resources are continuously developed, and the research and application of the floating ocean platforms are widely and unprecedentedly regarded. With the further development of China in the field of south China sea oil and gas resource development, the demand on floating ocean platforms is increasingly urgent.
The floating ocean platform has different amplitude and frequency oscillation effects along with the wave and ocean current conditions in real sea conditions, which affects the production operation safety on the floating ocean platform and parameters such as oscillation of liquid stored in a liquid tank of the platform, oil-water mixing ratio and the like. When the influence of large wind waves in actual sea conditions is received, the large-amplitude shaking motion response generated by the floating ocean platform can cause severe sloshing of the liquid tank, the stability of the floating ocean platform can be weakened, the position of an oil-water interface is unclear, the oil-water two-phase mixing is serious, the standard is not met, and normal production operation is interfered. The swaying motion of floating ocean platforms has become a critical part of the platform design that must be considered.
With the continuous improvement of the design and research of the floating ocean platform, the process research and development flow of the floating ocean platform is further refined. The pilot test adopting the large-scale model is an important part in the process of carrying out the development of laboratory-level small model research results to actual-scale offshore tests and even industrial practices, and the pilot test result can provide reference for selection of materials and parameters of each part of the platform, is an important criterion for judging whether the floating ocean platform process is mature and reliable and further put into industrial production practices, and is an important criterion for judging whether the floating ocean platform process is mature and reliable and further put into industrial production practices.
The essential difference between the floating ocean platform pilot test and the traditional pool laboratory test is that the existing floating platform test is mostly carried out indoors by adopting a small-scale non-steel material model, so that the floating ocean platform test has many limitations; the pilot plant usually adopts a large-scale steel material model to carry out a test with complete system configuration and higher simulation degree in an outdoor environment, and because the design of the pilot plant is more suitable for the test requirement of a certain floating ocean platform, the required motion simulation device and the control method are not suitable for imitating a laboratory pool motion simulation device from the aspects of design and cost. Therefore, in a pilot test environment, a floating platform motion simulation device with a simple, stable and reliable structure principle and a corresponding control method face urgent needs.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the above-mentioned problems in the prior art. In view of the above, the present invention needs to provide a device and a method for simulating a pilot test motion of a floating platform, which have simple structure and convenient operation, and can accurately and equivalently simulate a single-degree-of-freedom swinging motion of the floating ocean platform under actual sea conditions, and also simulate a coupled motion of multiple degrees of freedom of the platform at the inherent motion frequency of the platform.
The invention provides a floating platform pilot test motion simulation device, which comprises: the test platform is provided with a test groove which is hollow inside and has an opening structure at the top, the test groove is provided with a plurality of transmission parts for force direction conversion, and the force application assembly and the counterweight assembly are respectively arranged at two sides of the test groove; the test body is floated in the test groove through a flexible connecting piece, one end of the flexible connecting piece is connected with the counterweight assembly after bypassing one transmission piece, and the other end of the flexible connecting piece is connected with the force application assembly after bypassing a plurality of transmission pieces; the electric control cabinet is electrically connected with the force application assembly to control the movement of the force application assembly.
According to one embodiment of the invention, the force application assembly comprises an electric cylinder, a driving motor and a fixing seat for fixing the electric cylinder, a piston rod of the electric cylinder is connected with the flexible connecting piece, and the driving motor is connected with the electric cylinder to drive the piston rod to move.
According to one embodiment of the invention, the counterweight assembly comprises a counterweight support, a rotating lifting ring arranged on the counterweight support and a counterweight connected with the flexible connecting piece.
According to one embodiment of the invention, the transmission member is a fixed pulley.
According to one embodiment of the invention, the flexible connection is a steel cable.
According to one embodiment of the invention, the drive motor is a servo motor.
According to one embodiment of the invention, 45-degree chamfer surfaces are arranged on two opposite sides of the top opening of the test groove, each chamfer surface is provided with one fixed pulley, and the bottom of the test groove, facing one side of the force application component, is provided with one fixed pulley.
According to one embodiment of the invention, the weight member is a cylindrical structure weight.
According to one embodiment of the invention, the counterweight part comprises a counterweight frame and counterweights, the counterweight frame is erected on the test platform, two oppositely arranged guide rods are arranged on the counterweight frame, and the counterweights are arranged on the two guide rods in a penetrating manner and are sequentially stacked from bottom to top.
The invention also provides a control method of the floating platform pilot test motion simulation device, which comprises the following steps:
s1, enabling a steel wire rope to penetrate through a test body, enabling the test body to be floated in water in a test platform test groove through two fixed pulleys, and enabling the steel wire ropes on two sides of the test body to be at the same horizontal height under the condition that the test body is placed still, wherein one end of the steel wire rope is connected with a balancing weight, and the other end of the steel wire rope is connected with a piston rod of an electric cylinder;
s2, adjusting the specification or number of the balancing weights to meet the requirement of the motion simulation working condition;
s3, starting a test, operating an electric control cabinet, starting a servo motor to drive the piston rod to do linear reciprocating motion, and driving the steel wire rope to move and transmit driving force under the constraint of a fixed pulley together with the counterweight block to enable the test body to perform swinging motion in the water of the test tank;
s4, collecting test data, stopping collecting data after the electric cylinder stably moves for a period of time and when the curve reaches the design cycle number or duration when the test body swings and moves, slowing down the movement of the electric cylinder, and finally stopping at the initial position to ensure that the test body is also stable at the initial state;
and S5, repeating the steps S2 to S4 according to the next test setting, completing all working condition tests to further analyze the effectiveness of the collected test data, removing dead spots, then carrying out statistical analysis on duration curves of the recorded physical quantities to obtain swing motion responses under different working conditions, and drawing corresponding amplitude response curves.
The invention relates to a floating platform pilot test motion simulator, in a pilot test swing motion test of a test platform, namely a floating platform, an electric control cabinet provides a time sequence of active exciting force, the electric control cabinet is directly controlled to regulate a servo motor to rotate, the electric control cabinet and a counterweight component providing driven force control the force exerted on a piston rod and a steel wire rope together to ensure that a test body carries out reciprocating motion, a pulley system is utilized to support, restrain and stabilize the motion of a traction steel wire rope, so that the steel wire rope transfers the force more stably and effectively, the forced swing motion of the test platform directly connected with the steel wire rope in a vertical plane where the steel wire rope is positioned is realized and ensured, the device can be used for predicting the response performances of important kinematics, mechanics and the like such as dynamic restoring force of the floating platform, liquid tank swing motion response inside the platform and the like, and provides a new test hand for researching the motion response characteristic of the floating platform under the action of external load and various complex coupled motion simulations The motion simulator has simple structure and convenient operation, can accurately and equivalently simulate the single-degree-of-freedom swinging motion of the floating ocean platform under the actual sea condition, and can also simulate the coupling motion of multiple degrees of freedom of the platform under the inherent motion frequency of the platform.
Drawings
Fig. 1 is a perspective view of a pilot test motion simulator of a floating platform according to the present invention.
Fig. 2 is a front view of fig. 1.
Fig. 3 is a perspective view of another state of use of a pilot test motion simulator of a floating platform according to the present invention.
Fig. 4 is a left side view of fig. 3.
Fig. 5 is a flow chart of a control method of a pilot test motion simulator of a floating platform according to the present invention.
Reference numerals: 1-a test platform; 2-a test body; 3-a force application component; 4-a counterweight assembly; 5-an electric control cabinet; 6-wire rope (flexible connection); 11-a test cell; 12-fixed pulley (transmission); 31-an electric cylinder; 32-servo motor (drive motor); 33-a fixed seat; 41-counterweight bracket; 42-rotating the hanging ring; 43-a counterweight; 311-a piston rod; 431-a counterweight block; 432-a counterweight frame; 433-guide bar.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
As shown in fig. 1 to 4, a pilot test motion simulator for a floating platform includes: the testing device comprises a testing platform 1, a testing body 2, a force application component 3, a counterweight component 4 and an electric control cabinet 5 which are arranged on the testing platform 1, wherein a testing groove 11 which is hollow inside and has an opening structure at the top is arranged on the testing platform 1, a plurality of transmission parts for force direction conversion are arranged on the testing groove 11, and the force application component 3 and the counterweight component 4 are respectively arranged at two sides of the testing groove 11; the test body 2 is floated in the test groove 11 through a flexible connecting piece, one end of the flexible connecting piece is connected with the counterweight component 4 after bypassing a transmission piece, and the other end of the flexible connecting piece is connected with the force application component 3 after bypassing a plurality of transmission pieces; automatically controlled cabinet 5 and application of force subassembly 3 electric connection to control application of force subassembly 3's motion, automatically controlled cabinet establish 5 in the central control room, and inside electrical part that holds to provide operation interface, the test personnel operation of being convenient for, the central control room has certain distance apart from the pilot scale scene, and passes through the cable directly to link to each other with electronic jar 31, with stable servo motor for in the application of force subassembly 3 provides control signal.
The invention relates to a floating platform pilot test motion simulator, in a pilot test swing motion test of a test platform 1, namely a floating platform, an electric control cabinet 5 provides a time-course sequence of an active exciting force, the electric control cabinet 5 is directly controlled to regulate a servo motor 32 to rotate, the electric control cabinet and a counterweight component 4 providing a driven force control the force exerted on a piston rod 311 and a steel wire rope 6 together, so that a test body 2 carries out reciprocating motion, a pulley system is utilized to support, restrain and stabilize the motion of a traction steel wire rope 6, the steel wire rope 6 transfers the force more stably and effectively, the forced swing motion of the test platform 1 directly connected with the steel wire rope 6 in a vertical plane where the steel wire rope 6 is positioned is realized and ensured, and the device can be used for systematically forecasting important kinematics, hydrodynamics and the like response performances such as dynamic restoring force of the floating platform, liquid tank swing motion response in the platform and the like, the device has the advantages of simple structure and convenient operation, can accurately and equivalently simulate the single-degree-of-freedom swinging motion of the floating ocean platform under the actual sea condition, and can also simulate the coupling motion of multiple degrees of freedom of the platform under the inherent motion frequency of the platform.
As shown in fig. 1 to 3, the force application component 3 includes an electric cylinder 31, a driving motor and a fixing seat 33 for fixing the electric cylinder 31, a piston rod 311 of the electric cylinder 31 is connected with a flexible connecting member, the driving motor is connected with the electric cylinder 31 to drive the piston rod 311 to move, the whole electric cylinder 31 is fixed on the test platform 1, the servo motor 32 is directly controlled by the electric control cabinet 5 through a cable, according to the specific working condition requirement in the test, the rotation of the servo motor 32 pushes the piston rod 311 to perform periodic or irregular single-degree-of-freedom translational motion along the bus direction, another side of the piston rod 311 is connected with a steel wire rope 6, and the steel wire rope 6 and the piston rod 311 can perform motion and transmission force action in the same vertical plane.
As shown in fig. 1 to 4, the counterweight assembly 4 includes a counterweight support 41, a rotary suspension ring 42 disposed on the counterweight support 41, and a counterweight 43 connected to the flexible connecting member, the counterweight 43 in the counterweight assembly 4 passively controls the tension of the steel wire rope 6 and the piston rod 311 by gravity, and the weight of the counterweight 43 is set to satisfy the following condition: under the condition that the acceleration of the top of the test body 2 faces one side of the counterweight component, the gravity borne by the counterweight part 43 is slightly larger than the tension of the steel wire rope 6 on one side of the counterweight component 4 when the maximum amplitude of the angular acceleration of the swinging motion of the test body 3 can be provided.
As shown in fig. 1 to 4, the transmission member is a fixed pulley 12, which facilitates one hundred percent transmission of force and can change the transmission direction of force.
As shown in fig. 1 to 4, the flexible connecting member is a steel wire rope 6, the steel wire rope 6 plays a role in connecting each component in the whole motion simulator, the test body 2 is connected with the electric cylinder 31 and the counterweight component 4 in the same vertical plane through the steel wire rope 6, the connecting positions of the steel wire ropes 6 on two sides and the test body 2 are at the same height under the static condition of the test body 2, the steel wire rope 6 is limited by the fixed pulley, can only move and generate tension in the vertical plane, and the single-degree-of-freedom swinging motion of the test body 2 connected with the steel wire rope is realized.
As shown in fig. 1 to 3, the driving motor is a servo motor 32, and the motion of the servo motor 32 is operated by the electric control cabinet 6, so as to facilitate the control of the periodic or irregular single-degree-of-freedom translational motion of the piston rod 311 of the electric cylinder 31 in the test.
As shown in fig. 1 to 3, two opposite side edges of the top opening of the test groove 11 are provided with 45-degree chamfer surfaces, each chamfer surface is provided with a fixed pulley 12, the bottom of the test groove 11 facing to one side of the force application component 3 is provided with the fixed pulley 12, namely, the direction of the steel wire rope 6 of the test body 2 is changed by the fixed pulleys 12 at different positions, so that the steel wire rope 6 can only move and generate tension in a vertical plane, and the single-degree-of-freedom swinging motion of the test body 1 connected with the steel wire rope is realized.
As shown in fig. 1 to 4, in the different embodiments of the present invention, the weight member 43 is divided into two cases, one of which is: the counterweight 43 is a cylindrical counterweight 431, and the structure is simple and convenient to adjust and use; the second is as follows: the counterweight 43 includes counterweight frame 432 and balancing weight 431, counterweight frame 432 is established on test platform 1, be equipped with the guide bar 433 of two relative settings on the counterweight frame 432, a plurality of balancing weights 431 wear to locate on two guide bar 433 and stack the setting from bottom to top in proper order, make balancing weight 431 can only follow the up-and-down direction motion through guide bar 433, thereby the accurate motion of shaking of guaranteeing that test body 2 carries out single degree of freedom in test bath 11, and simultaneously, a plurality of balancing weights 431 can be suitable for the motion simulation of the test body 2 of different weights and use, and the suitability is strong.
As shown in fig. 1 to 5, a method for controlling a pilot test motion simulator of a floating platform includes the following steps:
s100, a steel wire rope 6 penetrates through a test body 2, the test body 2 is floated in water in a test groove 11 of a test platform 1 through two fixed pulleys 12, and under the condition that the test body 2 is kept still, the steel wire ropes 6 on two sides of the test body 2 are at the same horizontal height, wherein one end of the steel wire rope 6 is connected with a balancing weight, and the other end of the steel wire rope is connected with a piston rod 311 of an electric cylinder 31;
s200, adjusting the specification or number of the balancing weights to meet the requirement of the motion simulation working condition;
s300, starting a test, operating the electric control cabinet 5, starting the servo motor 32 to drive the piston rod 311 to do linear reciprocating motion, and driving the steel wire rope 6 to move and transmit driving force under the constraint of the fixed pulley 12 together with the counterweight block, so that the test body 2 performs swinging motion in the water of the test tank 11;
s400, collecting test data, stopping collecting the data when the electric cylinder 31 stably moves for a period of time and the curve reaches the designed period number or duration when the test body 2 swings and moves, slowing down the movement of the electric cylinder 31, and finally, standing at the initial position to enable the test body 2 to be stable at the initial state;
and S500, repeating the steps from S2 to S4 according to the next test setting, completing all working condition tests so as to further analyze the effectiveness of the collected test data, removing dead spots, then carrying out statistical analysis on duration curves of the recorded physical quantities, obtaining swing motion responses under different working conditions, and drawing corresponding amplitude response curves.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A floating platform pilot test motion simulation device is characterized by comprising: the test platform is provided with a test groove which is hollow inside and has an opening structure at the top, the test groove is provided with a plurality of transmission parts for force direction conversion, and the force application assembly and the counterweight assembly are respectively arranged at two sides of the test groove; the test body is floated in the test groove through a flexible connecting piece, one end of the flexible connecting piece is connected with the counterweight assembly after bypassing one transmission piece, and the other end of the flexible connecting piece is connected with the force application assembly after bypassing a plurality of transmission pieces; the electric control cabinet is electrically connected with the force application assembly to control the movement of the force application assembly.
2. The device of claim 1, wherein the force application assembly comprises an electric cylinder, a driving motor and a fixing seat for fixing the electric cylinder, a piston rod of the electric cylinder is connected with the flexible connecting member, and the driving motor is connected with the electric cylinder to drive the piston rod to move.
3. The device of claim 1, wherein the weight assembly comprises a weight support, a rotating suspension ring disposed on the weight support, and a weight member connected to the flexible connection member.
4. The device of claim 1, wherein the transmission member is a fixed pulley.
5. The device of claim 1, wherein the flexible connector is a steel cable.
6. The device of claim 2, wherein the drive motor is a servo motor.
7. The device for simulating the pilot test motion of the floating platform according to claim 4, wherein 45-degree chamfered surfaces are provided on two opposite sides of the top opening of the test tank, each chamfered surface is provided with one fixed pulley, and the bottom of the test tank facing one side of the force application assembly is provided with one fixed pulley.
8. The device of claim 3, wherein the weight member is a cylindrical counterweight.
9. The device of claim 3, wherein the weight member comprises a weight frame and a weight block, the weight frame is disposed on the testing platform, the weight frame is provided with two oppositely disposed guide rods, and the weight blocks are disposed on the two guide rods and stacked from bottom to top.
10. A control method of a floating platform pilot test motion simulation device is characterized by comprising the following steps:
s1, enabling a steel wire rope to penetrate through a test body, enabling the test body to be floated in water in a test platform test groove through two fixed pulleys, and enabling the steel wire ropes on two sides of the test body to be at the same horizontal height under the condition that the test body is placed still, wherein one end of the steel wire rope is connected with a balancing weight, and the other end of the steel wire rope is connected with a piston rod of an electric cylinder;
s2, adjusting the specification or number of the balancing weights to meet the requirement of the motion simulation working condition;
s3, starting a test, operating an electric control cabinet, starting a servo motor to drive the piston rod to do linear reciprocating motion, and driving the steel wire rope to move and transmit driving force under the constraint of a fixed pulley together with the counterweight block to enable the test body to perform swinging motion in the water of the test tank;
s4, collecting test data, stopping collecting data after the electric cylinder stably moves for a period of time and when the curve reaches the design cycle number or duration when the test body swings and moves, slowing down the movement of the electric cylinder, and finally stopping at the initial position to ensure that the test body is also stable at the initial state;
and S5, repeating the steps S2 to S4 according to the next test setting, completing all working condition tests to further analyze the effectiveness of the collected test data, removing dead spots, then carrying out statistical analysis on duration curves of the recorded physical quantities to obtain swing motion responses under different working conditions, and drawing corresponding amplitude response curves.
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| CN202010275550.XA CN113514223A (en) | 2020-04-09 | 2020-04-09 | Floating platform pilot test motion simulation device and control method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113680703A (en) * | 2021-10-25 | 2021-11-23 | 南通海峰家居用品有限公司 | Intelligent material screening method and system for rotary connector |
| CN114279733A (en) * | 2021-12-21 | 2022-04-05 | 华北电力大学 | Test device, method and application for researching dynamic response of floating nuclear power platform |
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2020
- 2020-04-09 CN CN202010275550.XA patent/CN113514223A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113680703A (en) * | 2021-10-25 | 2021-11-23 | 南通海峰家居用品有限公司 | Intelligent material screening method and system for rotary connector |
| CN113680703B (en) * | 2021-10-25 | 2022-01-18 | 南通海峰家居用品有限公司 | Intelligent material screening method and system for rotary connector |
| CN114279733A (en) * | 2021-12-21 | 2022-04-05 | 华北电力大学 | Test device, method and application for researching dynamic response of floating nuclear power platform |
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