CN110595816A - Intelligent floating structure mooring and cable breaking experiment simulation system - Google Patents
Intelligent floating structure mooring and cable breaking experiment simulation system Download PDFInfo
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- CN110595816A CN110595816A CN201910894710.6A CN201910894710A CN110595816A CN 110595816 A CN110595816 A CN 110595816A CN 201910894710 A CN201910894710 A CN 201910894710A CN 110595816 A CN110595816 A CN 110595816A
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- 230000001052 transient effect Effects 0.000 claims abstract description 18
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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Abstract
The invention discloses a mooring and cable breaking experimental simulation system of an intelligent floating structure, which comprises an experimental model, an intelligent cable breaking device, mooring cables and an intelligent control and monitoring system, wherein the intelligent cable breaking device is fixed at the position of a cable guide hole of the experimental model; one end of the mooring cable is fixed at the bottom of the water pool, the other end of the mooring cable is connected to the intelligent cable breaking device, the mooring cable is connected to a cable guide hole of the experimental model through the intelligent cable breaking device, and meanwhile the mooring cable can be disconnected from the experimental model through the intelligent cable breaking device; the intelligent control and monitoring system controls the intelligent cable breaking device to realize cable breaking control of the mooring cable and realize dynamic response monitoring of the experimental model and transient tension monitoring of the mooring cable. The invention simulates the cable breaking control of the floating mooring structure under the experimental condition, can accurately simulate the transient dynamic response of the floating body and the dynamic characteristics of the mooring cable when the mooring cable is broken, and solves the difficult problems of cable breaking transient control and monitoring under the experimental condition.
Description
Technical Field
The invention relates to a mooring analysis and experiment technology of an ocean floating structure, in particular to an intelligent floating structure mooring and cable breakage experiment simulation system.
Background
When the floating structure is engaged in production activities at the operating sea, its position and orientation are generally maintained by the mooring system. As a permanently moored floating structure, the floating foundation and its mooring system should withstand moderate sea conditions during its life cycle, and further inevitably suffer from various sea conditions, fatigue, corrosion, etc., which may cause the mooring lines to break, thereby affecting the safety of the structure.
In the design stage of the marine floating structure, damage analysis of a mooring system is considered as one of necessary links, and more, one of key elements which have important influence on the safety of the whole system. Therefore, domestic and foreign scholars develop a series of researches aiming at floating structures of different types. The method mainly adopts a numerical method to research transient motion under the condition that the mooring cable is broken, including transient dynamic response of a floating body structure, tension of the mooring cable, tension overshoot phenomenon of the mooring cable and the like. Research has shown that any breaking or loss of a mooring line of a floating structure can lead to failure of the mooring system, and even more serious safety accidents such as collision, overturning or sinking. Thus, as one of the important components of a floating structure, the properties of the mooring system will have a large impact on the dynamic response characteristics of the overall system. Research shows that transient dynamic response analysis under the condition of fracture of a mooring cable is always the focus of attention of scholars at home and abroad, and accurate simulation of the dynamic characteristics of the mooring cable is very important for the safety of a floating mooring structure. At present, most of research adopts a numerical simulation mode, and few researches relate to the experiment simulation of the transient dynamic response of the breakage of the mooring cable. However, experimental simulation is particularly irreplaceable and advantageous compared to numerical simulation, which is essential for practical engineering.
Disclosure of Invention
The invention aims to overcome the limitations of simulation of transient mechanical analysis of cable breakage of a floating structure and transient motion response of a structure under experimental conditions, provides an intelligent simulation system for mooring and cable breakage experiments of the floating structure, automatically controls cable breakage of mooring cables, and provides experimental basis for cable breakage research of the floating structure.
The technical scheme adopted by the invention is as follows: an intelligence floating structure moors and disconnected cable experiment analog system, includes:
the experimental model is placed in a water pool and used for simulating a floating structure;
the intelligent cable breaking device is fixed on the experimental model and is positioned at the cable guide hole position determined by the experimental scheme;
the first end part of the mooring cable is fixed at the bottom of the water pool, the second end part of the mooring cable is connected to the intelligent cable breaking device through a mooring cable connecting ring, the mooring cable is connected to a cable guide hole of the experimental model through the intelligent cable breaking device, and meanwhile the mooring cable can be disconnected from the experimental model through the intelligent cable breaking device; and the number of the first and second groups,
intelligent control and monitoring system, intelligent control and monitoring system includes host computer, displacement sensor, acceleration sensor and tension sensor, displacement sensor with acceleration sensor installs on the experimental model, tension sensor installs on the mooring cable, displacement sensor acceleration sensor tension sensor with intelligence disconnected cable device all with the host computer is connected, through host computer control intelligence disconnected cable device realizes the disconnected cable control of mooring cable, the host computer passes through displacement sensor with acceleration sensor realizes the dynamic response monitoring of experimental model, the host computer passes through tension sensor realizes the transient tension monitoring of mooring cable.
Furthermore, the intelligent cable breaking device comprises a push-pull electromagnet and a fixed support, the fixed support is fixed at the position of a cable guide hole of the experimental model, and an upper clamping plate and a lower clamping plate are arranged at the lower part of the fixed support; the push-pull electromagnet is fixed on the fixing support through a fixing nut and located above the upper clamping plate, the push-pull electromagnet comprises a movable iron core and a coil, the coil is powered on/off by the upper computer, the movable iron core penetrates through the upper clamping plate of the fixing support, the mooring cable connecting ring and the lower clamping plate of the fixing support, the mooring cable connecting ring is fixed on the intelligent cable breaking device through the upper clamping plate and the lower clamping plate, the movable iron core moves upwards under the condition that the coil is powered on to move away from the lower clamping plate, the mooring cable connecting ring is made to separate from the end of the movable iron core, and therefore the mooring cable is broken.
Furthermore, the intelligent cable breaking device, the upper computer, the displacement sensor, the acceleration sensor and the tension sensor are all powered by a power supply device.
The invention has the beneficial effects that:
1. according to the intelligent floating structure mooring and cable breakage experiment simulation system, cable breakage control of the floating mooring structure under the experiment condition is simulated, transient dynamic response of a floating body and dynamic characteristics of a mooring cable can be accurately simulated when the mooring cable is broken, and the problem of cable breakage transient control and monitoring under the experiment condition is solved;
2. according to the intelligent cable breaking device, the intelligent cable breaking device is controlled by the upper computer to realize instant fracture of the mooring cable, the intelligent degree is high, the intelligent device is simple and easy to operate and convenient to operate, and the difficulty and the error rate of experimental operation are reduced; after mooring and cable breaking, the mooring cable can be reconnected to the device, cable breaking and connection of the mooring cable are repeatedly performed, experiment repeatability is strong, repeated experiments are facilitated, controllability and accuracy of experiment tests are guaranteed, and scheme adjustment is facilitated according to the experiments;
3. the intelligent cable breaking device is simple in equipment, low in manufacturing cost, simple in device design, convenient to install and convenient to realize cable breaking control; the method can be used for mooring broken cable analysis of various ocean structures, and has strong universality; in the experimental engineering, the device is arranged at the corresponding position of an experimental model, is small and portable, and does not influence the dynamic response characteristics of a mooring cable and a floating structure;
4. the intelligent cable breaking device can replace mooring cables made of various materials according to different experimental requirements, and is simple, quick and strong in contrast;
5. the intelligent cable breaking device can simultaneously control the cable breaking devices of a plurality of cables according to experiment requirements, so that the test diversity of the experiment is met;
6. the intelligent floating structure mooring and cable breakage experiment simulation system is provided with an intelligent control and monitoring system, is connected with an intelligent control, monitoring and database system, is convenient to operate, monitors in real time, is convenient to store, and facilitates data comparison and result verification in real time.
Drawings
FIG. 1: the invention relates to a schematic diagram of a mooring and cable breaking experiment simulation system of an intelligent floating structure;
FIG. 2: the intelligent cable breaking device is connected with an experimental model and is schematically arranged;
FIG. 3: the invention discloses a three-dimensional view of an intelligent cable breaking device;
FIG. 4 a: the invention discloses a side view of an intelligent cable breaking device;
FIG. 4 b: the invention discloses a front view of an intelligent cable breaking device;
FIG. 4 c: the invention discloses a rear view of an intelligent cable breaking device;
the attached drawings are marked as follows: 1. an intelligent cable breaking device; 2. an experimental model; 3. a mooring line; 4. a power supply device; 5. an upper computer; 11. a push-pull electromagnet; 12. fixing a bracket; 13. a mooring line connecting ring; 14. fixing a nut; 111. a movable iron core; 112. a coil; 121. an upper splint; 122. and (5) a lower splint.
Detailed Description
In order to further understand the contents, features and effects of the present invention, the following embodiments are illustrated and described in detail with reference to the accompanying drawings:
the invention provides an intelligent floating mooring structure cable breaking experiment simulation system based on ocean engineering structure dynamics, and realizes various functions of ocean floating structure mooring analysis, cable breaking transient analysis, floating structure transient dynamic response research and the like in a laboratory. Aiming at the condition that the mooring cable 3 is suddenly broken, the transient dynamic response characteristics of the broken mooring cable 3 and the marine structure are analyzed through an experimental method. The method has reference significance for accurately simulating the transient motion response of the marine structure under the conditions of mooring and cable breakage and monitoring the tension change in the mooring cable 3. The mooring system adopts a full-automatic intelligent control mode, has high automation degree and strong operability, and can repeat experiments.
As shown in fig. 1 to 4c, an intelligent floating structure mooring and cable breaking experiment simulation system mainly comprises five parts: the intelligent cable breaking device comprises an intelligent cable breaking device 1, an experimental model 2, a mooring cable 3, a power supply device 4 and an intelligent control and monitoring system.
The experimental model 2 is placed in a water tank and used for simulating a floating structure.
The intelligent cable breaking device 1 is fixed on the experimental model 2 and is located at the cable guide hole position determined by the experimental scheme. The intelligent cable breaking device 1 comprises a push-pull electromagnet 11, a fixed support 12, a mooring cable connecting ring 13 and a fixed nut 14, wherein the fixed support 12 is fixed at a cable guide hole of the experimental model 2, and an upper clamping plate 121 and a lower clamping plate 122 are arranged at the lower part of the fixed support 12; the push-pull electromagnet 11 is fixed on the fixing bracket 12 by the fixing nut 14 and is located above the upper clamp plate 121, the push-pull electromagnet 11 includes a movable iron core 111 and a coil 112, the coil 112 is controlled by the upper computer 5 to be powered on/off, in an initial state, the movable iron core 111 passes through the upper clamp plate 121 of the fixing bracket 12, the mooring cable connecting ring 13 and the lower clamp plate 122 of the fixing bracket 12, the mooring cable connecting ring 13 is fixed on the intelligent cable breaker 1 by the upper clamp plate 121 and the lower clamp plate 122, in a powered-on state of the coil 112, the movable iron core 111 moves upwards to leave the lower clamp plate 122, so that the mooring cable connecting ring 13 is separated from the movable iron core 111 from the end of the movable iron core 111, thereby disconnecting the mooring cable 3, and in a powered-off state of the coil 112, the movable iron core 111 is reset under the action of the spring, and the mooring cable connecting ring 13 can be fixed on the intelligent cable breaking device 1 again.
The first end of the mooring cable 3 is fixed at the bottom of the water pool, the second end of the mooring cable 3 is connected to the intelligent cable breaking device 1 through a mooring cable connecting ring 13, the mooring cable 3 is connected to the position of a cable guide hole of the experimental model 2 through the intelligent cable breaking device 1, and meanwhile, the mooring cable 3 and the experimental model 2 can be disconnected through the intelligent cable breaking device 1.
The intelligent control and monitoring system comprises an upper computer 5, a displacement sensor, an acceleration sensor and a tension sensor, wherein the displacement sensor and the acceleration sensor are installed on the experimental model 2, the tension sensor is installed on the mooring cable 3, the displacement sensor, the acceleration sensor, the tension sensor and the intelligent cable breaking device 1 are connected with the upper computer 5, the upper computer 5 controls the intelligent cable breaking device 1 to achieve cable breaking control of the mooring cable 3, the upper computer 5 passes through the displacement sensor and the acceleration sensor to achieve dynamic response monitoring of the experimental model 2, and the upper computer 5 passes through the tension sensor achieves transient tension monitoring of the mooring cable 3.
The power supply device 4 supplies power to the intelligent cable breaking device 1, the upper computer 5, the displacement sensor, the acceleration sensor and the tension sensor.
The method for performing mooring and cable breakage experiment simulation by adopting the intelligent floating structure mooring and cable breakage experiment simulation system comprises the following steps:
step 1, processing an experimental model 2 according to needs, and determining an experimental scheme, wherein the determining of the experimental scheme includes determining the configuration of mooring cables 3 and simulation conditions of cable breakage, the configuration of the mooring cables 3 includes included angles between the mooring cables 3, positions of the mooring cables 3, the number of the mooring cables 3, cable guide hole positions, types and materials of the mooring cables 3, and the like, for example, several mooring cable 3 materials to be simulated can be determined before the experiment, and the mooring cables 3 of different materials are compared through the experiment, that is, the experimental simulation of the mooring cables 3 of multiple materials is performed, and the experimental simulation of the included angles between different mooring cables 3, the positions of different mooring cables 3, the number of different mooring cables 3, the different cable guide hole positions and the like can also be performed.
Step 2, formulating the intelligent cable breaking device 1 with proper specification and quantity according to the experimental scheme, wherein the model selection and the number of the push-pull electromagnets 11 are included, corresponding fixing supports 12 are designed according to the push-pull electromagnets 11, then the push-pull electromagnets 11 are fixed on the fixing supports 12 through fixing nuts 14, movable iron cores 111 of the push-pull electromagnets 11 penetrate through upper clamping plates 121 of the fixing supports 12, mooring cable connecting rings 13 and lower clamping plates 122 of the fixing supports 12, and the mooring cable connecting rings 13 are fixed on the intelligent cable breaking device 1 through the upper clamping plates 121 and the lower clamping plates 122.
And 3, installing the intelligent cable breaking device 1 at a corresponding cable guide hole position of the experimental model 2 according to an experimental scheme, connecting the mooring cable 3 and the experimental model 2 together through the mooring cable connecting ring 13 and the intelligent cable breaking device 1, connecting the intelligent cable breaking device 1, the intelligent control and monitoring system and the power supply device 4, and connecting the upper computer 5 into the intelligent cable breaking device 1, the mooring cable monitoring device (tension sensor) and the structural response monitoring device (displacement sensor and acceleration sensor), so as to perform cable breaking control on the mooring cable 3, dynamic response monitoring on the experimental model 2, dynamic characteristic monitoring on the mooring cable 3, and displacement time-course data, acceleration time-course data and tension time-course data of each mooring cable 3 of the experimental model 2.
And 4, carrying out a complete mooring experiment of the floating structure mooring according to the requirement of the experimental scheme, and monitoring the dynamic response of the experimental model 2 under complete mooring, the tension of the mooring cable 3 and the like through an intelligent control and monitoring system.
Step 5, according to the requirements of the experimental scheme, performing a cable disconnection experiment on the mooring cable 3, and controlling the energization of the coil 112 of one or more push-pull type electromagnets 11 through an intelligent control and monitoring system, so as to control the upward movement of the movable iron core 111, so that the movable iron core 111 is separated from the lower clamping plate 122, and the mooring cable connecting ring 13 is separated from the control of the movable iron core 111, so as to disconnect the mooring cable 3; through intelligent control and monitoring system, the dynamic response of experimental model 2 before the real-time supervision disconnected cable, disconnected cable in the twinkling of an eye and after disconnected cable, the dynamic response of each mooring cable 3 of real-time supervision different moments to and displacement time history data, acceleration time history data and the tension time history data monitoring of each mooring cable 3 of experimental model 2.
And 6, storing the experimental monitoring result obtained in the step 5 into a database.
And 7, controlling the coil 112 of the push-pull type electromagnet 11 corresponding to the mooring cable 3 disconnected from the experimental model 2 in the step 5 to be powered off through an intelligent control and monitoring system, so that the movable iron core 111 is reset, the movable iron core 111 penetrates through the upper clamping plate 121 of the fixed support 12, the mooring cable connecting ring 13 and the lower clamping plate 122 of the fixed support 12, and the mooring cable connecting ring 13 is fixed on the intelligent cable disconnecting device 1 again through the upper clamping plate 121 and the lower clamping plate 122, so that the mooring cable 3 and the experimental model 2 are connected again.
And 8, adjusting the experimental scheme, repeating the steps 3 to 7, and carrying out experiments of different experimental schemes. Wherein, the adjustment experimental scheme can be for the tension of adjustment mooring rope 3 carry out repeated experiment, thereby it reaches the simulation of different material mooring rope 3 to change a set of mooring rope 3 of different materials to carry out repeated experiment, or adjust the length of mooring rope 3 and carry out repeated experiment under the condition of not changing 3 materials of mooring rope, or adjust the tension of mooring rope 3 again and carry out repeated experiment after changing 3 of a set of different materials of mooring rope, etc..
Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and those skilled in the art can make many modifications without departing from the spirit and scope of the present invention as defined in the appended claims.
Claims (3)
1. The utility model provides an intelligence floating structure moors and disconnected cable experiment analog system which characterized in that includes:
the experimental model (2) is placed in a water pool and used for simulating a floating structure;
the intelligent cable breaking device (1) is fixed on the experimental model (2) and is positioned at the cable guide hole position determined by the experimental scheme;
the first end part of the mooring cable (3) is fixed at the bottom of the water pool, the second end part of the mooring cable (3) is connected to the intelligent cable breaking device (1) through a mooring cable connecting ring (13), the mooring cable (3) is connected to the cable guide hole of the experimental model (2) through the intelligent cable breaking device (1), and meanwhile, the mooring cable (3) can be disconnected from the experimental model (2) through the intelligent cable breaking device (1); and the number of the first and second groups,
the intelligent control and monitoring system comprises an upper computer (5), a displacement sensor, an acceleration sensor and a tension sensor, the displacement sensor and the acceleration sensor are mounted on the experimental model (2), the tension sensor is arranged on the mooring cable (3), the displacement sensor, the acceleration sensor, the tension sensor and the intelligent cable breaking device (1) are all connected with the upper computer (5), the intelligent cable breaking device (1) is controlled by the upper computer (5) to realize the cable breaking control of the mooring cable (3), the upper computer (5) realizes the dynamic response monitoring of the experimental model (2) through the displacement sensor and the acceleration sensor, and the upper computer (5) monitors the transient tension of the mooring cable (3) through the tension sensor.
2. The intelligent floating structure mooring and cable breaking experiment simulation system according to claim 1, wherein the intelligent cable breaking device (1) comprises a push-pull electromagnet (11) and a fixed bracket (12), the fixed bracket (12) is fixed at a cable guide hole of the experiment model (2), and an upper clamping plate (121) and a lower clamping plate (122) are arranged at the lower part of the fixed bracket (12); the push-pull electromagnet (11) is fixed on the fixing support (12) through a fixing nut (14) and is positioned above the upper clamping plate (121), the push-pull electromagnet (11) comprises a movable iron core (111) and a coil (112), the coil (112) is controlled to be switched on/off by the upper computer (5), the movable iron core (111) penetrates through the upper clamping plate (121) of the fixing support (12), the mooring cable connecting ring (13) and the lower clamping plate (122) of the fixing support (12), the mooring cable connecting ring (13) is fixed on the intelligent cable breaking device (1) through the upper clamping plate (121) and the lower clamping plate (122), the movable iron core (111) moves upwards to leave the lower clamping plate (122) under the condition that the coil (112) is electrified, and the mooring cable connecting ring (13) is separated from the movable iron core (111) from the end of the movable iron core (111), thereby causing the mooring line (3) to disconnect.
3. The intelligent floating structure mooring and cable breaking experiment simulation system according to claim 1, wherein the intelligent cable breaking device (1), the upper computer (5), the displacement sensor, the acceleration sensor and the tension sensor are all powered by a power supply device (4).
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