CN104458172B - A kind of uniform flow measures elongated standpipe dynamic response test device - Google Patents

Abstract

The invention discloses a test device for measuring the dynamic response of a slender standpipe under uniform flow. The invention can realize the vortex-induced vibration test of the standpipe under the action of uniform incoming flow; The safety factor of the key installation; the present invention can make full use of the depth of the deep pool of marine engineering to simulate the real Reynolds number vortex induced vibration of large pipes; the present invention can make full use of the width of the deep pool of marine engineering to arrange real-time monitoring equipment around large pipes, according to different The shape of the model needs to be adjusted; the 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; vortex induced vibration test.

Description

A test device for measuring the dynamic response of slender risers under uniform flow

technical field

The invention belongs to the field of marine engineering, and in particular relates to an experimental device for measuring the dynamic response of a slender standpipe under uniform flow and simultaneously monitoring vortex-induced vibration (VIV).

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. 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 At this time, the theory of small deformation is no longer applicable, which makes the problem of vortex-induced vibration of the riser more prominent.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 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 test the vortex-induced vibration at the real Reynolds number; 2. It is easy to arrange the underwater monitoring equipment around the standpipe, and the shape of the standpipe cannot be adjusted during the slow wave riser model test; 3. The forced oscillation experiment at a certain flow rate cannot be carried out; 4. The process of installing the standpipe in the experiment is difficult Complex; 5. It cannot effectively simulate the motion of the ocean platform.

Contents of the invention

The technical problem to be solved by the present invention is to provide a test device for measuring the dynamic response of a slender riser under uniform flow, aiming at analyzing the overall vortex-induced vibration response characteristics of a slender flexible standpipe under the action of uniform flow.

In order to solve the above-mentioned technical problems, the present invention provides a dynamic response test device for measuring slender risers under uniform flow, which is characterized in that it includes a deep-sea riser module, a top boundary module, a bottom boundary module, a fixed module, a top sliding module, and a bottom sliding module. Module, measurement analysis control module, the top boundary module is connected with the deep-sea riser module by screws, the top boundary module is fixed on the fixed module, and the screw I in the bottom boundary module is connected with the deep-sea riser module , 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 the deep-sea riser module. a pipe model, 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 three The force component fixing plate, the first three-component force meter, the first adjustment assembly, the first wedge, the outer edge of the top clamp is connected with the deep-sea riser model by screws, both of which are in the same plane, and the top clamp The bottom plate 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 universal joint rotating device connected, 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 first three-component force meter fixing plate side connection, the other side of the 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 other side of the first adjustment assembly One side 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, and the second universal joint rotating device , the fourth universal joint fixing plate, the second three-component force meter fixing plate, the second three-component force meter and the bottom fixing plate, the outer edge of the bottom clamp is connected with the deep-sea riser model through screws I, both In the same plane, the bottom clamp base plate is fixedly connected to the outer edge of the bottom clamp, the bottom clamp base plate is fixedly connected to the second backing plate, and the third universal joint fixing plate is connected to the second backing plate and the second backing plate. The universal joint rotating device is connected, 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 second three-point One side of the 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, and the 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 a first support frame, the vertical fixing plate is installed on the first slider, so A 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 to the first wedge, and the first power component is connected to the first sliding The rails are connected, the rotation 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 rail, and is connected with the vertical fixed plate, so The first support frame is fixedly connected to the measurement analysis control module, so that it can be linked, and the bottom sliding module includes a small false bottom panel, a panel repair plate, a panel connection block, a second power assembly, a second flange device, The second slider, the second guide chain, the second sliding track and the second support frame, the bottom end of the small false bottom panel is connected to the bottom fixing plate, and the panel connection block is welded directly below the small false bottom panel , and connected with two panel patches, the panel patch is welded on the second slider, the second power assembly is connected with the second sliding track through the second flange device, the second power assembly The rotating shaft is connected to the second slide block through the second guide chain, and the second slide block is slidably supported on the second slide track. Preferably, the bottom fixing plate is welded on the small false bottom panel

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

Preferably, the measurement analysis control module includes a data acquisition processor 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 end is connected with the 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 bottom sliding module The second power assembly 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 uniform incoming flow;

2. The present invention can make full use of the lifting bottom of deep water pools in marine engineering to increase the safety factor of large-scale key installations;

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 movement of the standpipe under the action of uniform 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 sliding module provided by the present invention.

Fig. 11 is a partial schematic diagram of the bottom sliding 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 test device for measuring the dynamic response of a slender riser with uniform flow down, including a deep-sea riser module 1, a top boundary module 2, a bottom boundary module 3, a fixed module 4, a top Sliding module 5, bottom sliding module 6, measurement analysis control module 7, described top boundary module 2 is connected with deep-sea riser module 1 by screw 11, and described top boundary module 2 is fixed on the fixed module 4, and described bottom boundary module The screw I22 in the module 3 is connected to the deep-sea riser module 1, one end of the fixed module 4 is installed on the top sliding module 5, and the bottom end of the bottom sliding module 6 is connected to the bottom boundary module 3, so The measurement analysis control module 7 is placed on the trailer, the deep-sea riser module 1 includes a deep-sea riser model 9, an optical fiber sensor 8, the optical fiber sensor 8 is arranged on the deep-sea riser model 9, and the deep-sea riser The top of the 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 clamp outer edge 10, screws 11, and a top clamp bottom plate 12 , the first backing plate 13, the first universal joint fixing plate 14, the first universal joint rotating device 15, the second universal joint fixing plate 16, the first three-component force meter fixing plate 17, the first three-component force meter 18, the first adjustment assembly 19, the first wedge 20, the outer edge 10 of the top clamp is connected with the deep-sea riser model 9 through screws 11, both of which are in the same plane, the bottom plate 12 of the top clamp and the top The clamp outer edge 11 is fixed, the top clamp bottom plate 12 is connected with the first backing plate 13 through screws 11, and the first universal joint fixing plate 14 is rotated with the first backing plate 13 and the first universal joint The device 15 is connected, the first universal joint rotating device 15 is fixedly connected with the first universal joint fixing plate 14 and the second universal joint fixing plate 16, and the second universal joint fixing plate 16 and the first three One side of the force component fixed plate 17 is connected, the other side of the first three component force instrument fixed plate 17 is connected with the first three component force instrument 18, and the end of the first three component force instrument 18 is connected with the first adjustment Components 19 are connected, the other side of the first adjustment component 19 is fixed on the first wedge 20, and the bottom boundary module 3 includes the bottom clamp outer edge 21, screw I22, bottom clamp bottom plate 23, the 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 fixing plate 28, second three-component force meter 29 and bottom Fixing plate 30, the outer edge 21 of the bottom fixture is connected with the deep-sea riser model 9 through screw I22, both are in the same plane, the bottom plate 23 of the bottom fixture is fixedly connected with the outer edge 21 of the bottom fixture, so The bottom clamp bottom plate 23 is fixedly connected with the second backing plate 24, the third universal joint fixing plate 25 is connected with the second backing plate 24 and the second universal joint rotating device 26, and the second universal joint rotates The device 26 is fixedly connected with the third universal joint fixing plate 25 and the fourth universal joint fixing plate 27, and the fourth universal joint fixing plate 27 and the second three-component force meter One side of the fixed plate 28 is connected, and the other side of the three-component force instrument fixed plate 28 is connected with the second three-component force instrument 29, and the end of the second three-component force instrument 29 is connected with the bottom fixed plate 30, so 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 a first power assembly 34, a first flange device 35, a first slider 36, and a first chain guide 37, the first sliding track 38 and the first support frame 39, the vertical fixing plate 32 is installed on the first slider 36, the vertical fixing block 33 is slidably installed on the vertical fixing plate 32, and the two sides are respectively installed The fairing 31, the vertical fixing block 33 is fixedly connected with the first wedge 20, the first power assembly 34 is connected with the first sliding track 38 through the first flange device 35, and the first power assembly 34 The rotating shaft of the first slide block 36 is connected to the first slide block 36 through the first guide chain 37, and the first slide block 36 is slidably supported on the first slide track 38, and is connected with the vertical fixed plate 32, and the first support frame 39 is fixed on the measurement analysis control module 7 so that it can be linked. The bottom sliding module 6 includes a small false bottom panel 40, a panel patch 41, a panel connecting block 42, a second power assembly 43, and a second flange Device 44, the second slide block 45, the second guide chain 46, the second sliding track 47 and the second support frame 48, the bottom end of the small false bottom panel 40 is connected on the bottom fixed plate 30, and the panel connecting block 42 is welded directly under the small false bottom panel 40, and is connected with two panel repair plates 41, and the panel repair plates 41 are welded on the second slider 45, and the second power assembly 43 passes through the second flange The device 44 is connected with the second sliding track 47, the rotating shaft of the second power assembly 43 is connected to the second sliding block 45 through the second guide chain 46, and the second sliding block 45 is slidably supported on the second sliding track 47, the second support frame is supported on the false bottom of the pool.

The bottom fixing plate 30 is welded on the small false bottom 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 motion controller and a display, and the input of the data acquisition processor is connected to the first three-component force meter in the top boundary module and the single component force in the bottom boundary module. instrument, and the fiber optic sensor, and its output is connected to the display; the motion controller includes a motion control output window and an image display port, the motion control output window is connected to the first power assembly of the top sliding module, and the first power assembly of the bottom sliding module. The two power components are connected, and the image display port is connected with the monitor.

The working principle of this specific implementation: during the test, the fiber optic sensor is evenly arranged on the deep-sea riser module in four directions, and a 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 to the 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 sliding module. During the test, relying on the lifting of the false bottom and the movement of the trailer, the riser model reaches the specified position and presents the specified Morphology, through the computer control motor in the measurement and analysis module, the riser moves at a constant speed in the horizontal 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.

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 kind of dynamic response test device for measuring slender riser under uniform flow, is characterized in that, comprises deep-sea riser module, top boundary module, bottom boundary module, fixed module, top slide module, bottom slide module, measurement analysis control module, The top boundary module is connected with the deep-sea riser module by screws, the top boundary module is fixed on the fixed module, the screw I in the bottom boundary module is connected with the deep-sea riser module, and the fixed module One end 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 a deep sea riser model, an optical fiber sensor, and 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, the bottom of the deep-sea riser model is connected with the bottom boundary module, and the top boundary module includes Top clamp outer edge, screws, top clamp bottom plate, first backing plate, first universal joint fixing plate, first universal joint rotation device, second universal joint fixing plate, first three-component force meter fixing plate, second A three-component force meter, the first adjustment assembly, the first wedge, the outer edge of the top fixture is connected with the deep-sea riser model through screws, both of which are in the same plane, the bottom plate of the top fixture and the outer edge of the top fixture The bottom plate of the top clamp is connected to the first backing plate through screws, the first universal joint fixing plate is connected to the first backing plate and the first universal joint rotating device, and the first The universal joint rotating device is fixedly connected to the first universal joint fixing plate and the second universal joint fixing plate, the second universal joint fixing plate is connected to one side of the first three-component force meter fixing plate, and the third universal joint fixing plate is connected to one side of the first universal joint fixing plate. The other side of the force meter fixing plate is connected to the first three-component force meter, the end of the first three-component force meter is connected to the first adjustment assembly, and the other side of the first adjustment assembly is fixed on the first On the wedge, 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 rotating device, and the fourth universal joint fixing plate, the second three-component force meter fixing plate, the second three-component force meter and the bottom fixing plate, the outer edge of the bottom fixture is connected with the deep-sea riser model through screw I, and the two are in the same plane, and the The base plate of the bottom fixture is affixed to the outer edge of the bottom fixture, the base plate of the bottom fixture is affixed to the second backing plate, and the third universal joint fixing plate is connected to the second backing plate and the second universal joint rotating device , the second universal joint rotating device is fixedly connected to the third universal joint fixing plate and the fourth universal joint fixing plate, and one side of the fourth universal joint fixing plate is connected to the second three-component force meter fixing plate , the other side of the second three-component force meter fixing plate is connected to the second three-component force meter, the end of the second three-component force meter is connected to the bottom fixing plate, and the fixed module includes a fairing, vertical The fixed plate and the vertical fixed block, the top sliding module includes the first power assembly, the first flange device, the first slider, the first guide chain, the first sliding track and the first support frame, the vertical fixed plate is mounted on the first slider, and the vertical fixed plate is slidably mounted with A vertical fixed block, fairings are respectively installed on both sides, the vertical fixed block is fixedly connected with the first wedge block, the first power assembly is connected with the first sliding track through the first flange device, and the first The rotating shaft of the 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 fixing plate, and the first support frame is fixed on the measurement and analysis control module, so that it can be linked. The bottom sliding module includes a small false bottom panel, a panel repair plate, a panel connection block, a second power assembly, a second flange device, a second slider, and a second guide chain, the second sliding track and the second support frame, the bottom end of the small false bottom panel is connected to the bottom fixing plate, the panel connection block is welded directly under the small false bottom panel, and is patched with two panels The panel patch is welded on the second slider, the second power assembly is connected with the second sliding track through the second flange device, and the rotation shaft of the second power assembly is connected through the second guide chain It is connected to the second sliding block, and the second sliding block is slidably supported on the second sliding track. 2. A test device for measuring the dynamic response of a slender standpipe evenly flowing down according to claim 1, wherein the bottom fixing plate is welded on the small false bottom panel. 3 . The dynamic response test device for measuring the slender riser with uniform flow down according to claim 1 , wherein the side of the first wedge is fixed on the vertical fixing block. 4 . 4. A kind of uniform flow down measurement slender riser dynamic response test device according to claim 1, is characterized in that, described measurement analysis control module comprises data acquisition processor motion controller and display, and described data acquisition processor The input end is connected with the first three-component force meter in the top boundary module, the single component force meter in the bottom boundary module, and the fiber optic sensor, and its output end is connected with the display; the motion controller includes a motion control output window And the image display port, the motion control output window is connected with the first power assembly of the top sliding module, the second power assembly of the bottom sliding module, and the image display port is connected with the display.