CN104483083B - The deep-sea slender standpipe dynamic response test device of simulated sea bottom pipeclay and shear flow - Google Patents

Abstract

The invention discloses simulated sea bottom pipeclay and the deep-sea slender standpipe dynamic response test device of shear flow, the present invention can realize vortex-induced vibration test of the standpipe under shear flow effect；Motion conditions after different-stiffness sea bed lower standing tube can be simulated being influenceed by top platform；The real Reynolds number vortex-induced vibration of the Simulation of depth large-size pipe of ocean engineering swimmer's pool can be made full use of；The width of ocean engineering swimmer's pool can be made full use of to arrange real-time monitoring equipment on large-size pipe periphery, need to be adjusted the shape of model according to different；Using modularized design, advantage is to be easily installed, and is easy to upgrading and change, and meet different functional requirements；Motion of the standpipe in the case where bottom class shear flow effect is become can be simulated, more real vortex-induced vibration test is carried out.

Description

A deep sea slender riser dynamic response test device for simulating submarine pipe soil and shear flow

technical field

The invention belongs to the field of ocean engineering, and in particular relates to an experimental device for measuring the dynamic response of a slender riser and monitoring the vortex-induced vibration (VIV) simultaneously, which can simulate the joint influence of the seabed pipe-soil action and shear flow.

Background technique

Under the action of wind, wave and current, the marine floating structure will drive the catenary riser to make periodic reciprocating motions in the water, thereby generating a relative oscillating flow in the direction of riser movement, and this oscillating flow will encourage the standpipe to hang "Intermittent" vortex-induced vibration occurs in the section. Under the action of floating body motion and environmental load, the interaction between the riser and the seabed will cause very large bending stress on the riser, which is prone to fatigue damage. In recent years, with the development of deep-sea petroleum systems, catenary risers have been widely used in engineering. The riser in the deep water environment can be regarded as a slender and flexible structure. At this time, the theory of small deformation is no longer applicable, which makes the problem of vortex-induced vibration of the riser more prominent. The analysis of the overall vortex-induced vibration response characteristics is the key to whether it can be applied to engineering practice.

In the past, the most commonly used methods for predicting vortex-induced vibration hazards of slender marine structures were numerical calculations of SHEAR7, VIVA, and VIVANA. This method of predicting loads and responses through theoretical formulas still has great uncertainty. So far, one of the most important methods to study the vortex-induced vibration phenomenon of flexible pipes is the model test method. The phenomena observed in model experiments are closer to the real situation in nature. Through the search of the prior art, the riser model test is generally carried out in the deep water tank of the towed marine engineering, some are carried out in the annular tank, and some are tested by the tugboat to drag the riser for vortex induced vibration. The paper "Experiments with asteel catenary riser model in a towing tank" published in the 43rd issue of "Applied Ocean Research (2013)" (a slender and flexible riser model experiment in a towing tank), in the towing tank by running and riser Connected carriages are used to simulate the stable flow field around the standpipe, and a miniature accelerometer is installed on the standpipe to monitor the state of the standpipe. Analyzing this test technology, it is found that its disadvantages are: 1. Considering the depth of the towing pool, it is generally only possible to simulate the vortex-induced vibration of small-scale pipe fittings, and it is difficult to effectively conduct the vortex-induced vibration test at the real Reynolds number. 2. It cannot pass Experimental simulation of the interaction between the riser and the seabed 3. It is not easy to arrange underwater monitoring equipment around the riser, and the shape of the riser cannot be adjusted during the slow wave riser model test 4. It is impossible to perform forced oscillation at a certain flow rate Experiment 5. The process of installing the riser in the experiment is more complicated. 6. The movement of the offshore platform cannot be effectively simulated.

Contents of the invention

The technical problem to be solved by the present invention is to provide a deep sea slender riser dynamic response test device for simulating seabed pipe soil and shear flow, aiming at analyzing the overall vortex of the slender flexible riser under the action of variable bottom shear flow. Excited vibration response characteristics.

In order to solve the above technical problems, an embodiment of the present invention provides a deep-sea slender riser dynamic response test device for simulating seabed pipe-soil and shear flow, including a deep-sea riser module, a top boundary module, a bottom boundary module, a fixed module, The top sliding module, the bottom sandboard module and the measurement analysis control module, the top boundary module is connected with the deep sea riser module through screws, the top boundary module is fixed on the fixed module, and the bottom boundary module is connected to the The deep-sea riser module is connected, one end of the fixed module is installed on the top sliding module, the bottom end of the bottom sliding module is connected to the bottom boundary module, the measurement analysis control module is placed on the trailer, the The deep-sea riser module includes a deep-sea riser model and an optical fiber sensor, the optical fiber sensor is arranged on the deep-sea riser model, the top of the deep-sea riser model is connected with the top boundary module, and the bottom of the deep-sea riser model It is connected with the bottom boundary module, and the top boundary module includes the outer edge of the top clamp, screws, bottom plate of the top clamp, the first backing plate, the first universal joint fixing plate, the first universal joint rotating device, the second universal joint joint fixing plate, the first three-component force meter fixing plate, the first three-component force meter, the first adjustment assembly and the first wedge, the outer edge of the top clamp is connected with the deep-sea riser model by screws, and the two are in the same In the plane, the bottom plate of the top fixture is affixed to the outer edge of the top fixture, the bottom plate of the top fixture is connected to the first backing plate through screws, and the first universal joint fixing plate is connected to the first backing plate and the first backing plate. The first universal joint rotating device is connected, and the first universal joint rotating device is fixedly connected to the first universal joint fixing plate and the second universal joint fixing plate, and the second universal joint fixing plate and the second universal joint fixing plate are connected. One side of the three-component force gauge fixed plate is connected, the other side of the first three-component force gauge fixed plate is connected with the first three-component force gauge, and the end of the first three-component force gauge is connected with the first adjustment assembly connection, the other side of the first adjustment assembly is fixed on the first wedge, and the bottom boundary module includes the outer edge of the bottom clamp, screw I, the bottom plate of the bottom clamp, the second backing plate, and the third universal joint The fixed plate, the second universal joint rotating device, the fourth universal joint fixed plate, the second three-component force instrument fixed plate, the second three-component force instrument and the bottom fixed plate, the outer edge of the bottom clamp is connected with the fixed plate by screw I The deep-sea riser model is connected to the above-mentioned deep-sea riser model, and both are in the same plane. The fixing plate is connected with the second backing plate and the second universal joint rotating device, and the second universal joint rotating device is fixedly connected with the third universal joint fixing plate and the fourth universal joint fixing plate, and the fourth The universal joint fixed plate is connected to one side of the second three-component force instrument fixed plate, and the other side of the second three-component force instrument fixed plate is connected to the second three-component force instrument. The end is connected with the bottom fixed plate, the fixed module includes a fairing, a vertical fixed plate and a vertical fixed block, and the top sliding module includes a first power assembly, a first flange device, a first slider, a first guide chain, the first sliding track and the first support frame, the vertical fixed plate Installed on the first slider, the vertical fixing block is slidably installed on the vertical fixing plate, and fairings are respectively installed on both sides, the vertical fixing block is fixedly connected with the first wedge, and the first power assembly passes through The first flange device is connected to the first sliding track, the rotating shaft of the first power assembly is connected to the first slider through the first guide chain, and the first slider is slidably supported on the first sliding track, And connected with the vertical fixed plate, the first support frame is fixed on the measurement and analysis control module, so that it can be linked, and the bottom sand board module includes a sand changing board panel, a panel repair board, a panel connecting block, The second power assembly, the second flange device, the second connection block, the second guide chain, the bottom fixed track and the second support frame, the bottom end of the sand changing plate panel is connected to the bottom fixed plate, and the panel is connected The block is welded directly under the face plate of the sand change plate, and connected with two panel patch plates, the panel patch plate is welded on the second connecting block, and the second power assembly is connected to the bottom fixed rail through the second flange device connected, the rotating shaft of the second power assembly is connected to the second connection block through the second guide chain, the second connection block is slidably supported on the bottom fixed track, and the second support frame is supported on the false bottom of the pool superior.

Wherein, the bottom fixing plate is welded on the sand changing plate panel.

Wherein, the side of the first wedge is fixed on the vertical fixing block.

Wherein, the measurement analysis control module includes a data acquisition processor, a motion controller and a display, and the input end of the data acquisition processor is connected to the first three-component force meter in the top boundary module and the unit in the bottom boundary module. The force component is connected with the optical fiber sensor, and its output is connected with the display; the motion controller includes a motion control output window and an image display port, and the motion control output window is connected with the first power assembly of the top sliding module And the second power assembly of the bottom sand board module is connected, and the image display port is connected with the monitor

The beneficial effects of above-mentioned technical scheme of the present invention are as follows:

1. The present invention can realize the vortex-induced vibration test of the standpipe under the action of shear flow;

2. The present invention can simulate the movement of risers under the seabed with different stiffnesses affected by the top platform;

3. The present invention can make full use of the depth of deep pools in marine engineering to simulate the real Reynolds number vortex-induced vibration of large pipe fittings;

4. The present invention can make full use of the width of deep pools in marine engineering to arrange real-time monitoring equipment around large pipes, and adjust the shape of the model according to different needs;

5. The present invention adopts a modular design, which has the advantages of being easy to install, easy to upgrade and change, and to meet different functional requirements;

6. The present invention can simulate the motion of the standpipe under the action of the variable-bottom shear flow, and conduct a more realistic vortex-induced vibration test.

Description of drawings

Fig. 1 is a schematic structural view of the experimental device provided by the present invention.

Fig. 2 is a top structural view of the experimental device provided by the present invention.

Fig. 3 is a bottom structural view of the experimental device provided by the present invention.

Fig. 4 is a schematic structural view of the deep-sea riser module provided by the present invention.

Fig. 5 is a schematic structural diagram of the top border module provided by the present invention.

Fig. 6 is a schematic structural diagram of the bottom boundary module provided by the present invention.

Fig. 7 is a side view of the fixing module provided by the present invention.

Fig. 8 is a schematic structural view of the top sliding module provided by the present invention.

Fig. 9 is a side view of the top sliding module provided by the present invention.

Fig. 10 is a schematic structural view of the bottom sand board module provided by the present invention.

Fig. 11 is a partial schematic view of the bottom sand board module provided by the present invention.

detailed description

In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

As shown in Figures 1-11, the embodiment of the present invention provides a deep-sea slender riser dynamic response test device for simulating seabed pipe-soil and shear flow, which is characterized in that it includes a deep-sea riser module 1 and a top boundary module 2 , bottom boundary module 3, fixed module 4, top sliding module 5, bottom sandboard module 6 and measurement analysis control module 7, described top boundary module 2 is connected with deep sea riser module 1 by screw 11, described top boundary module 2 is fixed on the fixed module 4, the bottom boundary module 3 is connected with the deep-sea riser module 1 through screws I22, one end of the fixed module 4 is installed on the top sliding module 5, and the bottom sliding module 6 The bottom end is connected to the bottom boundary module 3, the measurement analysis control module 7 is placed on the trailer, the deep sea riser module 1 includes a deep sea riser model 9 and an optical fiber sensor 8, and the optical fiber sensor 8 is arranged on the On the deep-sea riser model 9, the top of the deep-sea riser model 9 is connected to the top boundary module 2, the bottom of the deep-sea riser model 9 is connected to the bottom boundary module 3, and the top boundary module 2 includes a top Fixture outer edge 10, screw 11, top fixture bottom plate 12, first backing plate 13, first universal joint fixing plate 14, first universal joint rotating device 15, second universal joint fixing plate 16, first three points The force meter fixing plate 17, the first three-component force meter 18, the first adjustment assembly 19 and the first wedge 20, the outer edge 10 of the top clamp is connected with the deep-sea riser model 9 by screws 11, both of which are on the same plane Inside, the top clamp bottom plate 12 is fixedly connected to the top clamp outer edge 11, the top clamp bottom plate 12 is connected to the first backing plate 13 through screws 11, and the first universal joint fixing plate 14 is connected to the first backing plate 13. The first backing plate 13 is connected to the first universal joint rotating device 15, and the first universal joint rotating device 15 is fixedly connected to the first universal joint fixing plate 14 and the second universal joint fixing plate 16, so The second universal joint fixing plate 16 is connected to one side of the first three-component force gauge fixing plate 17, and the other side of the first three-component force gauge fixing plate 17 is connected to the first three-component force gauge 18. The end of the first three-component force meter 18 is connected to the first adjustment assembly 19, and the other side of the first adjustment assembly 19 is fixed on the first wedge 20, and the bottom boundary module 3 includes a bottom clamp outer Edge 21, Screw I 22, Bottom Fixture Base Plate 23, Second Backing Plate 24, Third Universal Joint Fixing Plate 25, Second Universal Joint Rotating Device 26, Fourth Universal Joint Fixing Plate 27, Second Three-Component Force Meter The fixed plate 28, the second three-component force meter 29 and the bottom fixed plate 30, the outer edge 21 of the bottom fixture is connected with the deep-sea riser model 9 through the screw I22, both of which are in the same plane, and the bottom plate of the bottom fixture 23 is affixed to the outer edge 21 of the bottom fixture, the bottom plate 23 of the bottom fixture is affixed to the second backing plate 24, and the third universal joint fixing plate 25 is rotated with the second backing plate 24 and the second universal joint The device 26 is connected, the second universal joint rotating device 26 is fixedly connected with the third universal joint fixing plate 25 and the fourth universal joint fixing plate 27, and the first universal joint fixing plate 27 is fixedly connected. One side of the four universal joint fixing plate 27 is connected with the second three-component force meter fixing plate 28, and the other side of the second three-component force meter fixing plate 28 is connected with the second three-component force meter 29, and the second three-component force meter fixing plate 28 is connected. The end of the three-component force meter 29 is connected with the bottom fixed plate 30, and the fixed module 4 includes a fairing 31, a vertical fixed plate 32 and a vertical fixed block 33, and the top sliding module 5 includes the first power assembly 34, the second A flange device 35, a first slider 36, a first guide chain 37, a first slide track 38 and a first support frame 39, the vertical fixing plate 32 is installed on the first slider 36, and the vertical fixing A vertical fixing block 33 is slidably installed on the plate 32, and fairings 31 are respectively installed on both sides. Connected with the first sliding track 38, the rotating shaft of the first power assembly 34 is connected to the first sliding block 36 through the first guide chain 37, and the first sliding block 36 is slidably supported on the first sliding track 38 , and is connected with the vertical fixing plate 32, the first support frame 39 is fixed on the measurement analysis control module 7, so that it can be linked, and the bottom sand board module 6 includes a sand board panel 40, a panel complement Plate 41, panel connection block 42, second power assembly 43, second flange device 44, second connection block 45, second guide chain 46, bottom fixed track 47 and second support frame 48, the sand change plate panel The bottom end of 40 is connected on the bottom fixing plate 30, and the panel connection block 42 is welded directly below the sand change plate panel 40, and is connected with two panel patch panels 41, and the panel patch panel 41 is welded on the second On the connection block 45, the second power assembly 43 is connected to the bottom fixed rail 47 through the second flange device 44, and the rotation shaft of the second power assembly 43 is connected to the second connection block 45 through the second guide chain 46 Above, the second connection block 45 is slidably supported on the bottom fixed rail 47, and the second support frame 48 is supported on the false bottom of the pool.

The bottom fixing plate 30 is welded on the sand changing plate panel 40 .

The side of the first wedge 20 is fixed on the vertical fixing block 33 .

The measurement analysis control module 7 includes a data acquisition processor, a motion controller and a display, and the input end of the data acquisition processor is connected to the first three-component force meter in the top boundary module and the single component in the bottom boundary module. Force meter, and optical fiber sensor are connected, and its output end is connected with display; Described motion controller comprises motion control output window and image display port, and described motion control output window is connected with the first power component of described top sliding module and The second power assembly of the bottom sandboard module is connected, and the image display port is connected with a monitor.

The specific implementation working principle of this device: During the test, the optical fiber sensor is evenly arranged on the deep-sea riser module in four directions, and the heat shrinkable tube is put on the riser (buoyancy blocks can be added if necessary), and the two ends of the riser are respectively connected. On the top boundary module and the bottom boundary module, they are respectively connected with the fixed module, the top sliding module and the bottom sandboard module. During the test, relying on the lifting of the false bottom and the movement of the trailer, the riser model reaches the designated position, showing The specified shape, the riser moves down the given direction, the movement of the riser is recorded by a high-speed camera, the strain is measured by an optical fiber sensor, and the data is sent to the computer for post-processing. Since the bottom is a sandboard module, it can simulate the bottom of the ocean In addition, in the case of simulating shear flow, a section at the bottom of the standpipe can be sheathed to protect it from the impact of seawater.

The above description is a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, these improvements and modifications It should also be regarded as the protection scope of the present invention.

Claims (4)

1. A deep-sea slender riser dynamic response test device for simulating seabed pipe-soil and shear flow, characterized in that it comprises a deep-sea riser module, a top boundary module, a bottom boundary module, a fixed module, a top sliding module, a bottom sand board module and measurement analysis control module, the top boundary module is connected with the deep-sea riser module through screws, the top boundary module is fixed on the fixed module, and the bottom boundary module is connected with the deep-sea riser module through screw I One end of the fixed module is installed on the top sliding module, the bottom end of the bottom sliding module is connected to the bottom boundary module, the measurement analysis control module is placed on the trailer, and the deep sea riser module includes deep sea A riser model and an optical fiber sensor, the optical fiber sensor is arranged on the deep-sea riser model, the top of the deep-sea riser model is connected to the top boundary module, and the bottom of the deep-sea riser model is connected to the bottom boundary module , the top boundary module includes the outer edge of the top clamp, screws, the bottom plate of the top clamp, the first backing plate, the first universal joint fixing plate, the first universal joint rotating device, the second universal joint fixing plate, the first The three-component force meter fixing plate, the first three-component force meter, the first adjustment assembly and the first wedge block, the outer edge of the top clamp is connected with the deep-sea riser model by screws, the two are in the same plane, and the top The fixture bottom plate is fixedly connected to the outer edge of the top fixture, the top fixture bottom plate is connected to the first backing plate through screws, and the first universal joint fixing plate rotates with the first backing plate and the first universal joint The device is connected, the first universal joint rotating device is fixedly connected with the first universal joint fixing plate and the second universal joint fixing plate, and the second universal joint fixing plate and the first three-component force meter fixing plate One side is connected, the other side of the first three-component force gauge fixing plate is connected with the first three-component force gauge, the end of the first three-component force gauge is connected with the first adjustment assembly, and the first adjustment The other side of the assembly is fixed on the first wedge, and the bottom boundary module includes the outer edge of the bottom clamp, screw I, the bottom plate of the bottom clamp, the second backing plate, the third universal joint fixing plate, the second universal joint joint rotating device, the fourth universal joint fixing plate, the second three-component force instrument fixing plate, the second three-component force instrument and the bottom fixing plate, and the outer edge of the bottom fixture is connected with the deep-sea riser model through screw I , both are in the same plane, the bottom fixture bottom plate is affixed to the outer edge of the bottom fixture, the bottom fixture bottom plate is affixed to the second backing plate, and the third universal joint fixing plate is fixed to the second backing plate It is connected with the second universal joint rotating device, and the second universal joint rotating device is fixedly connected with the third universal joint fixing plate and the fourth universal joint fixing plate, and the fourth universal joint fixing plate and the first universal joint fixing plate One side of the two three-component force meter fixed plate is connected, the other side of the second three-component force meter fixed plate is connected with the second three-component force meter, and the end of the second three-component force meter is connected with the bottom fixed plate , the fixed module includes a fairing, a vertical fixed plate and a vertical fixed block, and the top sliding module includes a first power assembly, a first flange device, a first slider, a first guide chain, a first slide track and The first support frame, the vertical fixed plate is installed on the first slider, the vertical A vertical fixing block is slidably installed on the straight fixing plate, and fairings are respectively installed on both sides. The vertical fixing block is fixedly connected to the first wedge, and the first power assembly is connected to the first sliding track through the first flange device. connected, the rotating shaft of the first power assembly is connected to the first slider through the first guide chain, the first slider is slidably supported on the first sliding track, and is connected with the vertical fixed plate, the The first support frame is fixed on the measurement and analysis control module so that it can be linked. The bottom sand board module includes a sand board panel, a panel patch panel, a panel connection block, a second power assembly, and a second flange device , the second connecting block, the second guide chain, the bottom fixed track and the second support frame, the bottom end of the sand changing plate panel is connected to the bottom fixing plate, and the panel connecting block is welded directly below the sand changing plate panel , and connected with two panel patch panels, the panel patch panels are welded on the second connection block, the second power assembly is connected with the bottom fixed rail through the second flange device, the second power assembly The rotating shaft is connected to the second connection block through the second guide chain, the second connection block is slidably supported on the bottom fixed track, and the second support frame is supported on the false bottom of the pool. 2. The deep-sea slender riser dynamic response test device for simulating seabed pipe-soil and shear flow according to claim 1, wherein the bottom fixing plate is welded on the sand-changing plate panel. 3. the deep sea slender riser dynamic response test device of simulating seabed pipe soil and shear flow according to claim 1, is characterized in that, the side of described first wedge is fixed on the described vertical fixed block. 4. the deep-sea slender riser dynamic response test device of simulating seabed pipe soil and shear flow according to claim 1, is characterized in that, described measurement analysis control module comprises data acquisition processor, motion controller and display, The input end of the data acquisition processor is connected with the first three-component force meter in the top boundary module and the single component force meter in the bottom boundary module, and an optical fiber sensor, and its output end is connected with a display; The motion controller includes a motion control output window and an image display port, the motion control output window is connected with the first power assembly of the top sliding module and the second power assembly of the bottom sandboard module, and the image display port Connect to the display.