CN212206544U - Umbilical cable dynamics model verification test system - Google Patents
Umbilical cable dynamics model verification test system Download PDFInfo
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- CN212206544U CN212206544U CN202021066988.9U CN202021066988U CN212206544U CN 212206544 U CN212206544 U CN 212206544U CN 202021066988 U CN202021066988 U CN 202021066988U CN 212206544 U CN212206544 U CN 212206544U
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Abstract
The utility model relates to a submarine cable test system especially relates to an umbilical cable dynamics model verification test system. The umbilical cable lifting device comprises an adjustable lifting platform, an umbilical cable fixing support, a three-dimensional force sensor, an umbilical cable and a movable load platform; the adjustable lifting platform is arranged on the movable load platform; the umbilical cable fixing support is arranged on the adjustable lifting platform and is driven by the adjustable lifting platform to lift; the three-dimensional force sensor is arranged on the umbilical cable fixing support and is connected with one end of the umbilical cable, and the other end of the umbilical cable extends into water; the three-dimensional force sensor is used for acquiring the stress change of the umbilical cable in an underwater motion state. The utility model discloses can simulate under the pond condition umbilical cable at mother's ship heaving and the current velocity of flow jointly arouse underwater motion form and the inside maximum tensile variation tendency of cable, can be used to verify the exactness of umbilical cable dynamics modeling and revise the dynamics model parameter.
Description
Technical Field
The utility model relates to a submarine cable test system especially relates to an umbilical cable dynamics model verification test system.
Background
At present, an umbilical cable of a deep sea ROV (remote operated unmanned underwater vehicle) at home and abroad is usually a steel wire reverse spiral armored cable, and plays important roles of physical connection, energy supply, information transmission and the like between a support mother ship and the underwater vehicle. The umbilical cable has complex dynamic characteristics under the influence of the heave of the mother ship, the flow velocity of ocean current, the rigidity of the umbilical cable and the like. Under the action of ocean currents, the umbilical cable can be bent and changed in space shape, the phenomenon of severe alternation of high and low tension can occur inside the umbilical cable under high sea conditions, and if the strength of the umbilical cable is insufficient, the umbilical cable is easy to break, so that the ROV loss accident is caused. How to reveal the complex dynamic characteristics of the underwater umbilical cable system in a deep water environment in principle and how to reduce the tension of the armor cable in practical measures are key problems to be solved by the current deep sea ROV running to deep sea operation. In order to prevent accidents, it is necessary to establish a dynamic mathematical model of the umbilical cable, predict in advance the underwater form and stress state of the umbilical cable under combined excitation of mother ship heaving, sea current and the like, so as to evaluate whether safe use is possible or not, and whether other tension suppression measures are necessary or not. After the kinetic mathematical model is established, a special test system is needed to verify the model, but no special umbilical cable kinetic verification test system exists at present, so that the safety use evaluation of the umbilical cable is not facilitated.
SUMMERY OF THE UTILITY MODEL
To the above problem, an object of the utility model is to provide an umbilical cable dynamics model verification test system to the safe handling aassessment of umbilical cable.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
an umbilical cable dynamic model verification test system comprises an adjustable lifting platform, an umbilical cable fixing support, a three-dimensional force sensor, an umbilical cable and a movable load platform;
the adjustable lifting platform is arranged on the movable load platform;
the umbilical cable fixing support is arranged on the adjustable lifting platform and is driven by the adjustable lifting platform to lift;
the three-dimensional force sensor is arranged on the umbilical cable fixing support;
the head end of the umbilical cable is connected with the three-dimensional force sensor, and the tail end of the umbilical cable is a free end and can be deeply inserted into water; the three-dimensional force sensor is used for acquiring the stress change of the umbilical cable in an underwater motion state.
The adjustable lifting platform is arranged in the middle of one side of the movable load platform; and a gravity center regulator is arranged on the other side of the movable load platform.
The gravity center regulators are two and are respectively arranged at the front end and the rear end of the other side of the movable load platform.
The gravity center adjuster is formed by stacking a plurality of weight plates.
The adjustable lifting platform comprises an upper fixing plate, a sliding block, a screw rod, a guide rod, a lower fixing plate and a rotary driving motor, wherein the lower fixing plate is arranged on the movable load platform, the upper fixing plate is connected with the lower fixing plate through the guide rod, and two ends of the screw rod are respectively and rotatably connected with the upper fixing plate and the lower fixing plate; the sliding block is connected with the lead screw through a nut, is connected with the guide rod in a sliding manner, and is connected with the umbilical cable fixing bracket; the rotary driving motor is arranged in the movable load platform, and the output end of the rotary driving motor is connected with the screw rod.
The mobile load platform realizes the movement along a determined direction through magnetic track navigation.
The utility model discloses an advantage does with positive effect:
1. the utility model can stably simulate the underwater motion and stress state of the umbilical cable under the combined excitation of the mother ship heaving and the ocean current flow velocity, and verify the correctness of the dynamic mathematical model;
2. the utility model discloses a test system has characteristics such as simple structure, convenient operation, commonality are strong, can extend and use the marine field of dragging.
Drawings
Fig. 1 is the utility model discloses umbilical cable dynamics model verification test system's schematic structure diagram.
In the figure: the device comprises an adjustable lifting platform 1, an umbilical cable fixing support 2, a three-dimensional force sensor 3, an umbilical cable 4, a movable load platform 5, a gravity center adjuster 6, an upper fixing plate 11, a sliding block 12, a lead screw 13, a guide rod 14 and a lower fixing plate 15.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, the utility model provides an umbilical cable dynamics model verification test system, including adjustable lift platform 1, umbilical cable fixed bolster 2, three-dimensional force sensor 3, umbilical cable 4 and mobile load platform 5; the adjustable lifting platform 1 is arranged on the movable load platform 5; the umbilical cable fixing support 2 is arranged on the adjustable lifting platform 1 and is driven by the adjustable lifting platform 1 to lift; the three-dimensional force sensor 3 is arranged on the umbilical cable fixing support 2 and is connected with one end of an umbilical cable 4, and the other end of the umbilical cable 4 extends into water; the three-dimensional force sensor 3 is used for acquiring stress changes of the umbilical cable 4 in an underwater motion state.
In the embodiment of the present invention, the adjustable lifting platform 1 comprises an upper fixing plate 11, a slider 12, a lead screw 13, a guide rod 14, a lower fixing plate 15 and a rotary driving motor, wherein the lower fixing plate 15 is disposed on the movable load platform 5, the upper fixing plate 11 is connected with the lower fixing plate 15 through the guide rod 14, and two ends of the lead screw 13 are respectively rotatably connected with the upper fixing plate 11 and the lower fixing plate 15; the sliding block 12 is connected with the lead screw 13 through a nut, the sliding block 12 is connected with the guide rod 14 in a sliding mode, and the sliding block 12 is connected with the umbilical cable fixing support 2; the rotary driving motor is arranged in the movable load platform 5, and the output end of the rotary driving motor is connected with the screw 13. The rotary driving motor drives the screw rod 13 to rotate, the screw rod 13 drives the sliding block 12 to move up and down along the guide rod 14 through the nut, so that the umbilical cable fixing support 2 and the umbilical cable 4 are driven to move up and down, and the dynamic characteristic of the heave of the mother ship can be simulated.
The embodiment of the utility model provides an in, the motion along a definite direction is realized through magnetic track navigation to the mobile load platform 5, can simulate the excitation of ocean current velocity of flow. Therefore, the underwater motion and stress state of the umbilical cable 4 under combined excitation of the mother ship heaving and the current flow velocity can be stably simulated, and the stress change of the umbilical cable 4 obtained through the test is compared with the change rule obtained through the dynamic model to verify the correctness of the dynamic model.
The embodiment of the utility model provides an in, for the convenience of drawing forth umbilical cable 4, adjustable lift platform 1 sets up in one side middle part of removal load platform 5, and the opposite side of removing load platform 5 is equipped with focus regulator 6.
Specifically, the center of gravity adjusters 6 are two and provided at the front and rear ends of the other side of the moving load platform 5, respectively. The gravity center regulator 6 and the adjustable lifting platform 1 are arranged on two sides of the movable load platform 5 and used for regulating the gravity center distribution of the system and ensuring the balance of the system.
Specifically, the gravity center adjuster 6 is formed by stacking a plurality of weight plates from bottom to top, with the weight plate taking direction being vertically upward.
In the embodiment of the utility model, the movable load platform 5 realizes the movement along a determined direction through magnetic track navigation, and the adjustable lifting platform 1 is fixed on the top of the movable load platform 5 and can move in the same plane along with the movable load platform 5; umbilical cable fixed bolster 2 links to each other with adjustable lift platform 1, and three-dimensional force sensor 3 both ends link to each other with umbilical cable fixed bolster 2 and umbilical cable 4 respectively, and the free end of umbilical cable 4 gos deep into the aquatic. The umbilical cable 4 can do horizontal and heave motions along with the movable load platform 5 and the adjustable lifting platform 1, and the device can be used for simulating the underwater motion and stress state of the umbilical cable 4 under the excitation of the heave and ocean current motion of the marine mother ship.
Specifically, the three-dimensional force sensor 3 is collinear with the connecting position of the umbilical cable fixing support 2 and the umbilical cable 4, and is connected with an upper computer data acquisition system through an interface on the movable load platform 5, and the adjustable lifting platform 1 is connected with the upper computer data acquisition system through an interface on the movable load platform 5. The movable load platform 5 realizes constant-speed movement, straight movement and braking along a determined direction through magnetic track navigation.
The utility model provides a pair of umbilical cable dynamics model verification test system's working process as follows:
the mobile load platform 5 is arranged on the bank side of the test water pool, the navigation magnetic stripe is arranged in parallel to the water pool, and the distance from the magnetic stripe to the edge of the water pool is greater than one half of the width of the mobile load platform 5. The head end of the umbilical cable 4 is fixed at the lower end of the three-dimensional force sensor 3, the rest part of the umbilical cable hangs down into the water, the umbilical cable 4 is guaranteed to float in the water, and the free end of the umbilical cable does not drag the bottom, so that the reading of the three-dimensional force sensor 3 is approximately equal to the weight of the umbilical cable 4 in the water. The counterweight weight of the gravity center regulator 6 on the movable load platform 5 is adjusted, so that the movable load platform 5 cannot overturn in the experimental process. According to the test requirements, required motion parameters are respectively set for the mobile load platform 5 and the adjustable lifting platform 1 from the upper computer, so that the mobile load platform 5 moves according to the set parameters after starting to move, the data acquired by the three-dimensional force sensor 3 is read by the upper computer, and the change of the tension of the head end of the umbilical cable 4 in the motion state is obtained.
The change curve of the stress of the three-dimensional force sensor along with time can be obtained through data acquisition. And then, an umbilical cable dynamics model is utilized, a motion rule which is the same as that of the test is given, simulation is carried out, a change curve of the tension of the head end of the umbilical cable along with the change of time is obtained and compared with the test curve, and the correctness of the model is verified according to the similarity degree of the two curves.
The utility model discloses can be under the pond condition, the motion form of simulation umbilical cable under mother's ship heaving and the current velocity of flow jointly stimulates underwater and the inside maximum tensile variation trend of cable, can be used to verify the exactness of umbilical cable dynamics modeling and revise the dynamics model parameter. The utility model has the advantages of simple structure, convenient operation, strong expansibility and the like.
The above description is only for the embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement, extension, etc. made within the spirit and principle of the present invention are all included in the protection scope of the present invention.
Claims (6)
1. An umbilical cable dynamics model verification test system is characterized by comprising an adjustable lifting platform (1), an umbilical cable fixing support (2), a three-dimensional force sensor (3), an umbilical cable (4) and a mobile load platform (5);
the adjustable lifting platform (1) is arranged on the movable load platform (5);
the umbilical cable fixing support (2) is arranged on the adjustable lifting platform (1) and is driven by the adjustable lifting platform (1) to lift;
the three-dimensional force sensor (3) is arranged on the umbilical cable fixing support (2);
the head end of the umbilical cable (4) is connected with the three-dimensional force sensor (3), and the tail end of the umbilical cable (4) is a free end and can be deeply inserted into water; the three-dimensional force sensor (3) is used for collecting stress changes of the umbilical cable (4) in an underwater motion state.
2. The umbilical cable dynamics model verification test system of claim 1, wherein the adjustable lifting platform (1) is arranged in the middle of one side of the mobile load platform (5); and a gravity center regulator (6) is arranged on the other side of the movable load platform (5).
3. Umbilical cord dynamics model verification test system according to claim 2, characterized in that the centre of gravity adjuster (6) is two and is arranged at the front and rear end of the other side of the mobile load platform (5).
4. Umbilical cord dynamics model verification test system according to claim 2, characterized in that the centre of gravity regulator (6) is made of a stack of several weight plates.
5. The umbilical cable dynamics model verification test system of claim 1, wherein the adjustable lifting platform (1) comprises an upper fixing plate (11), a slide block (12), a lead screw (13), a guide rod (14), a lower fixing plate (15) and a rotary driving motor, wherein the lower fixing plate (15) is arranged on the movable load platform (5), the upper fixing plate (11) is connected with the lower fixing plate (15) through the guide rod (14), and two ends of the lead screw (13) are respectively and rotatably connected with the upper fixing plate (11) and the lower fixing plate (15); the sliding block (12) is connected with the lead screw (13) through a nut, the sliding block (12) is in sliding connection with the guide rod (14), and the sliding block (12) is connected with the umbilical cable fixing support (2); the rotary driving motor is arranged in the movable load platform (5), and the output end of the rotary driving motor is connected with the lead screw (13).
6. Umbilical cord dynamics model verification test system according to claim 1, characterized in that the moving load platform (5) is moved in a certain direction by magnetic track navigation.
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| CN202021066988.9U CN212206544U (en) | 2020-06-11 | 2020-06-11 | Umbilical cable dynamics model verification test system |
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| CN202021066988.9U CN212206544U (en) | 2020-06-11 | 2020-06-11 | Umbilical cable dynamics model verification test system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111649910A (en) * | 2020-06-11 | 2020-09-11 | 中国科学院沈阳自动化研究所 | Umbilical cable dynamics model verification test system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111649910A (en) * | 2020-06-11 | 2020-09-11 | 中国科学院沈阳自动化研究所 | Umbilical cable dynamics model verification test system |
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