CN105547623A - Tension leg vortex-induced vibration test device under bidirectional shear flow and bidirectional stepped shear flow - Google Patents
Tension leg vortex-induced vibration test device under bidirectional shear flow and bidirectional stepped shear flow Download PDFInfo
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- CN105547623A CN105547623A CN201510920177.8A CN201510920177A CN105547623A CN 105547623 A CN105547623 A CN 105547623A CN 201510920177 A CN201510920177 A CN 201510920177A CN 105547623 A CN105547623 A CN 105547623A
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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
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
Abstract
The invention provides a tension leg vortex-induced vibration test device under bidirectional shear flow and bidirectional stepped shear flow in the technical field of ocean engineering. The device of the invention comprises a tension leg model mechanism, a measurement and analysis module, a driving module, a cantilever module, a bottom supporting module, a flow baffle module and a sliding groove module, wherein the tension leg model mechanism is fixed on the cantilever module via a specially-designed fixing end; each two of the bottom supporting module, the driving module and the cantilever module are vertically connected; the flow baffle module is fixed on the cantilever module via a support; the bottom supporting module is fixed on a water tank steel lifting bottom via a high-strength bolt; the sliding groove module is fixed on the bottom supporting module via a bolt; the cantilever is driven by the driving module to rotate; and each measurement instrument of the measurement and analysis module is arranged in the tension leg model mechanism and the cantilever module in a disperse mode. The device of the invention is convenient to assemble and disassemble, low in the complexity degree, and high in flexibility, and can simulate an actual-scale tension leg and a shear flow field.
Description
Technical field
What the present invention relates to is a kind of device of field of ocean engineering, specifically the vortex-induced vibration test device of flexible pipe mould tension leg under double direction shear stream and two-way ladder shear flow in a kind of oceanographic engineering swimmer's pool.
Background technology
Ocean interior estimates is the typical severe sea condition of ubiquitous one in the ocean of density stratification, and it has the features such as amplitude is large, the duration long, non-linear.For tension leg platform (TLP), the interior ripple of frequent activities not only can produce huge shock load to tension leg, also can make its effect of bearing double direction shear stream or two-way ladder shear flow and vortex-induced vibration occurs.So-called vortex-induced vibration, refer to the column structure thing be in certain speed incoming flow, its both sides can occur alternately to rush down whirlpool.Cylinder can be subject to the fluctuation pressure of transverse direction and the flow direction be associated with the generation of whirlpool and bleed off.Pulsating Flow muscle power can cause the vibration of cylinder, and the vibration of cylinder can change its wake structure again conversely.This fluid and the interactional problem of works are called vortex-induced vibration.The vortex-induced vibration phenomenon of tension leg seriously can reduce its fatigue lifetime, therefore in the urgent need to furtheing investigate for this problem, develops reliable tension leg vortex-induced vibration forecasting procedure, for the engineering design of tension leg is offered help.
At present, domestic and international academia and engineering circles less for the research of tension leg vortex-induced vibration phenomenon in interior wave current field, totally be divided into model test and numerical simulation two kinds of modes, direct Numerical vortex-induced vibration existing problems are more, current empirical model software of forecasting is as SHEAR7 etc., there is the defects such as such as efficiency is low, low precision, it forecasts that the result obtained usually has larger gap with test findings, needs to carry out assessing and revising.The vortex-induced vibration phenomenon of tension leg can be studied preferably by test method, a period of time makes some progress in the past, but generally speaking still have the following disadvantages: the vortex-induced vibration 1, generally can only simulating small scale pipe fitting, be difficult to effectively to carry out the vortex-induced vibration test under real Reynolds number.2, generally can only simulate the vortex-induced vibration of tension leg in uniform flow field, the vortex-induced vibration of tension leg in Shearing Flow can not be simulated.3, device is comparatively complicated, heavy, and install inconvenient, the power of motor of needs is very large.
Summary of the invention
The present invention is directed to prior art above shortcomings, tension leg vortex-induced vibration test device under a kind of double direction shear stream and two-way ladder shear flow is provided, large-scale physical size tension leg, double direction shear stream and two-way ladder Shearing Flow can be simulated, have and be convenient to the low and dirigibility advantages of higher of dismounting, complexity.
For achieving the above object, the present invention is achieved by the following technical solutions.
A tension leg vortex-induced vibration test device under the double direction shear stream of field of ocean engineering and two-way ladder shear flow, comprising: tension leg model mechanism, Measurement and analysis module, driver module, cantilever module, bottom support module, baffle module and chute module; Wherein, described tension leg model mechanism is fixed in cantilever module, and described bottom support module is connected with driver module is vertical, and described driver module is connected with cantilever module is vertical; Described baffle module is fixed in cantilever module, and described chute module is fixed in bottom support module; Described cantilever module is driven by driver module and rotates, and described Measurement and analysis module arrangement is among tension leg model mechanism and cantilever module.
Described cantilever module is integral type structure.
Under described double direction shear stream and two-way ladder shear flow, tension leg vortex-induced vibration test device entirety is vertically installed in oceanographic engineering swimmer's pool, under double direction shear stream and two-way ladder shear flow, the bottom support module of tension leg vortex-induced vibration test device is fixed on by high-strength bolt at pond steel the lifting end, dismounting is convenient in the present invention, complexity is low, dirigibility is high, can simulate real yardstick tension leg double direction shear flow field and two-way ladder Shearing Flow.
Preferably, described tension leg model mechanism comprises: tension leg model, the stiff end being arranged at tension leg model two ends and web joint; Wherein, each stiff end includes: universal joint, three component instrument sensors, sliding axle, tension leg fixture splice, linear bearing and buffer spring, wherein: the two ends of tension leg fixture splice are connected with one end of universal joint with tension leg model respectively, the other end of universal joint is fixedly installed on three component instrument sensors, three component instrument sensors are fixed in one end of linear bearing, and are connected with buffer spring with sliding axle respectively; Stiff end is fixed on the end of cantilever module by web joint.
Preferably, the ratio that linear mass and the unit length of tension leg model of described tension leg model arrange quality is 1: 1.
Preferably, described tension leg model mechanism also comprises sleeve, and described jacket casing is connected to one end stiff end end points of tension leg model and arranges the outside of tension leg model of this stiff end side.
Preferably, described Measurement and analysis module comprises: measuring unit, under water video record unit, computing unit and wireless transmission unit, wherein: in the trailer machine room that computing unit is arranged at oceanographic engineering swimmer's pool and the wireless measurement signal exported for transmitting video record unit and measuring unit under water that is connected with wireless transmission unit, computing unit carries out Storage and Processing to the wireless measurement signal received in real time.
Preferably, described driver module comprises: change speed gear box, motor, driving shaft, driven wheel, wherein: the two ends of change speed gear box are connected with driving shaft with motor respectively, and driving shaft is connected with driven wheel, driven wheel drives cantilever module to rotate.
Preferably, the reduction gear ratio of described change speed gear box is 40: 1.
Preferably, described cantilever module comprises: cantilever, steady brace, the first diagonal brace and the second diagonal brace, wherein: described cantilever is divided into horizontal boom section and vertical cantilever segment, vertical cantilever segment is by the first diagonal brace proof strength, and the end of vertical cantilever segment is connected with tension leg model mechanism; The center of cantilever is connected by stationary installation with bottom support module, and the bottom of cantilever is connected by the second diagonal brace and steady brace with bottom stationary installation, the lower end of steady brace with the face of chute module contact on be furnished with steel ball respectively.
Preferably, the lower end of steady brace is furnished with steel ball respectively on three faces contacted with the annular concave chute of chute module, facilitates steady brace to rotate in chute module; Steady brace plays motion stabilization effect, prevents from occurring in cantilever rotation process significantly to rock; Diagonal brace can improve structural strength.
Preferably, described cantilever adopts hollow, rectangular block structure, and the internal height of hollow, rectangular block structure is 94mm, and external height is 100mm, and wide is 0.6m, and horizontal span is 5m.
Preferably, horizontal boom section and vertical cantilever segment weld together.
Preferably, described baffle module comprises: bottom flow-stopping plate and side flow-stopping plate; Wherein, bottom flow-stopping plate is fixed on horizontal boom section by support, and side flow-stopping plate is fixed on vertical cantilever segment.
Preferably, described chute module comprises: chute supported base, chute locking device, chute supported base is bolted in bottom support module, chute locking device and chute supported base are bolted thus form annular concave chute, and the steady brace of cantilever module is slided in annular concave chute by steel ball.
Preferably, described bottom support module comprises: Cylindorical rod and bottom base; Wherein, driver module (motor, change speed gear box, driven wheel and driving shaft) is placed in the inside of Cylindorical rod, and the lower weld of Cylindorical rod is in bottom base; Chute module is secured by bolts in the upper end of bottom base, bottom base is fixedly installed at the bottom of the lifting of oceanographic engineering swimmer's pool by high-strength bolt, and then under making double direction shear stream and two-way ladder shear flow, tension leg vortex-induced vibration test device is wholy set in oceanographic engineering swimmer's pool.
Compared with prior art, advantage of the present invention comprises:
1, the whirligig test duration of the present invention is long, and good stability, the accuracy of experimental data are high;
2, the present invention can simulate more real marine environment, comprises double direction shear stream and two-way ladder Shearing Flow, and the feature of physical size pipe fitting large Reynold number in true marine environment, this than ever method of testing have significant progress;
3, dirigibility of the present invention is high, can be simulated the two-way ladder shear flow of different operating mode by change sleeve socket position and length;
4, apparatus of the present invention complexity is low, and quality is light, modularization and easy to loading and unloading, and the power of motor of requirement is lower, and the vortex-induced vibration test device of performance and efficiency tension leg more in the past improves a lot.
Accompanying drawing explanation
By reading the detailed description done non-limiting example with reference to the following drawings, other features, objects and advantages of the present invention will become more obvious:
Fig. 1 is that the present invention is not with tube-in-tube structure schematic diagram.
Fig. 2 is Measurement and analysis module diagram.
Fig. 3 is the structure front elevation of driver module.
Fig. 4 is the structural representation of cantilever module and baffle module.
Fig. 5 is the structural representation of bottom support module.
Fig. 6 is the structural representation of chute module.
Fig. 7 is the front elevation of stiff end in tension leg model mechanism.
Fig. 8 is the vertical view of stiff end in tension leg model mechanism.
Fig. 9 is tension leg model structural scheme of mechanism.
Figure 10 is band tube-in-tube structure schematic diagram of the present invention.
In figure: 1 is tension leg model mechanism, 2 is Measurement and analysis module, 3 is driver module, 4 is cantilever module, 5 is baffle module, 6 is bottom support module, 7 is chute module, 8 is measuring unit, 9 is video record unit under water, 10 is computing unit, 11 is wireless transmission unit, 12 is change speed gear box, 13 is motor, 14 is driving shaft, 15 is driven wheel, 16 is steady brace, 17 is cantilever, 18 is diagonal brace, 19 is sleeve, 20 is bottom surface flow-stopping plate, 21 is side flow-stopping plate, 22 is Cylindorical rod, 23 is bottom base, 24 is chute supported base, 25 chute locking devices, 26 is tension leg model, 27 is universal joint, 28 is three component instrument sensors, 29 is sliding axle, 30 is web joint, 31 is tension leg fixture splice, 32 is linear bearing, 33 is buffer spring.
Embodiment
Below embodiments of the invention are elaborated: the present embodiment is implemented under premised on technical solution of the present invention, give detailed embodiment and concrete operating process.It should be pointed out that to those skilled in the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.
Embodiment
Present embodiments provide tension leg vortex-induced vibration test device under a kind of double direction shear stream and two-way ladder shear flow, comprising: tension leg model mechanism, Measurement and analysis module, driver module, cantilever module, bottom support module, baffle module and chute module.Wherein, tension leg model mechanism is fixed in cantilever module by the stiff end of particular design, and bottom support module is connected with driver module is vertical, and driver module is connected with cantilever module is vertical.Baffle module is fixed in cantilever module by support.Chute module is bolted in bottom support module.Bottom support module is fixed on by high-strength bolt at the steel lifting end of oceanographic engineering swimmer's pool, and drive cantilever module to rotate by driver module, each surveying instrument dispersed placement of Measurement and analysis module is among tension leg model mechanism and cantilever module.
Further, described tension leg model mechanism comprises: tension leg model, the stiff end being arranged at tension leg model two ends and web joint; Wherein each stiff end includes: universal joint, three points of force snesor, sliding axle, tension leg fixture splice, linear bearing and buffer springs, wherein: the two ends of tension leg fixture splice are connected with one end of universal joint with tension leg model respectively, the other end of universal joint is fixedly installed on three component instrument sensors, three component instrument sensors are fixed in linear bearing one end, and are connected with buffer spring with sliding axle respectively.Stiff end is fixed on vertical cantilevered distal end by web joint.
Further, described tension leg model mechanism also comprises sleeve, and jacket casing is connected to the left end point of tension leg model and the outside of whole left part, makes the tension leg model of band sleeve part not by fluid-load, thus realizes the object of simulated dual to ladder shear flow.
Further, the mass ratio that the linear mass of described tension leg model and its unit length arrange water is 1: 1.
Further, described Measurement and analysis module comprises: measuring unit, under water video record unit, computing unit and wireless transmission unit, wherein: be connected to transmit the wireless measurement signal that video record unit and measuring unit under water export with wireless transmission unit in the trailer machine room that computing unit is arranged at oceanographic engineering swimmer's pool, computing unit carries out Storage and Processing to the wireless measurement signal received in real time.
Further, described driver module comprises: change speed gear box, motor, driving shaft, driven wheel, wherein: change speed gear box two ends are connected with driving shaft with motor respectively, driving shaft is connected with driven wheel, driven wheel drives cantilever module to rotate, and the Cylindorical rod that motor, change speed gear box, driven wheel, driving shaft are fixedly installed on bottom support module is inner.
Further, the reduction gear ratio of described change speed gear box is 40: 1.
Further, described cantilever module comprises: cantilever, steady brace and diagonal brace, wherein: described cantilever adopts hollow, rectangular block structure, and the internal height of hollow, rectangular block structure is 94mm, and external height is 100mm, and wide is 0.6m, and horizontal span is 5m; Cantilever is divided into horizontal boom section and vertical cantilever segment, vertical cantilever segment uses diagonal brace (the first diagonal brace) proof strength, the end of vertical cantilever segment is connected with the stiff end in tension leg model mechanism, and each section of cantilever (horizontal boom section and vertical cantilever segment) welds together.The center of cantilever is connected by stationary installation with the Cylindorical rod of bottom support module, bottom (bottom) and the bottom of stationary installation of cantilever use diagonal brace (the second diagonal brace) and steady brace to be connected, the lower end of steady brace is furnished with steel ball on three faces contacted with the annular concave chute of chute module, facilitates steady brace to rotate in circular track.Steady brace plays motion stabilization effect, prevents from occurring in cantilever rotation process significantly to rock.Diagonal brace can improve structural strength.
Further, described baffle module comprises: bottom flow-stopping plate, side flow-stopping plate.Wherein bottom flow-stopping plate is fixed in horizontal boom section by support, and side flow-stopping plate is fixed on vertical cantilever segment, can be used for eliminating below mechanism to the impact in flow field, top, builds good experiment flow field environment.
Further, described bottom support module comprises: Cylindorical rod and bottom base.Wherein: driver module is placed in the inside of Cylindorical rod, and lower weld is in bottom base.Chute module is secured by bolts in bottom base upper end, and bottom base is fixedly installed at the bottom of the lifting of oceanographic engineering swimmer's pool by high-strength bolt.
Further, described chute module comprises: chute supported base and chute locking device, chute supported base is bolted in bottom support module, chute locking device and chute supported base are bolted thus form annular concave chute, and steady brace is slided in annular concave chute by steel ball.
Below in conjunction with accompanying drawing, the present embodiment is further described.
As shown in Figure 1, the present embodiment comprises: tension leg model mechanism 1, Measurement and analysis module 2, driver module 3, cantilever module 4, baffle module 5, bottom support module 6 and chute module 7, wherein: tension leg model mechanism 1 is fixed in cantilever module 4 by the stiff end of particular design, bottom support module 6, driver module 3, cantilever module 4 vertically connect between two.Baffle module 5 is fixed in cantilever module 4 by support, and bottom support module 6 is fixed on by high-strength bolt at pond steel the lifting end, drives cantilever-rotating by driver module 3.The steady brace of cantilever module 4 by having slided motion stabilization effect in the chute of chute module 7.Each surveying instrument dispersed placement of Measurement and analysis module is among pipe fitting model, cantilever module 4.Whole device is vertically placed in oceanographic engineering swimmer's pool.
As shown in Figure 2, described Measurement and analysis module 2 comprises: measuring unit 8, under water video record unit 9, computing unit 10 and wireless transmission unit 11, wherein: be connected to transmit with wireless transmission unit 11 the wireless measurement signal that video record unit 9 and measuring unit 8 under water export in the machine room that computing unit 10 is arranged at the trailer of oceanographic engineering swimmer's pool, computing unit 10 carries out Storage and Processing to the wireless measurement signal received in real time.
As shown in Figure 3, described driver module 3 comprises: change speed gear box 12, motor 13, driving shaft 14, driven wheel 15, wherein: change speed gear box 12 two ends are connected with driving shaft 14 with motor 13 respectively, driving shaft 14 is connected with driven wheel 15, and motor 13, change speed gear box 12, driven wheel 15, driving shaft 14 are fixedly installed on Cylindorical rod inside.The reduction gear ratio of described change speed gear box 12 is 40: 1.
As shown in Figure 4, described cantilever module 4 comprises: steady brace 16, cantilever 17, diagonal brace 18, wherein: cantilever 17 center is connected with Cylindorical rod is vertical, jib foot uses diagonal brace 18 to be connected with steady brace 16, steady brace 16 is furnished with steel ball on three faces contacted with annular concave chute, rotates in chute.The end of cantilever is connected with the stationary installation in tension leg model mechanism 1.
Described baffle module 5 comprises the bottom surface flow-stopping plate 20 being fixed in horizontal boom section and the side flow-stopping plate 21 being fixed in vertical cantilever segment.
As shown in Figure 5, described bottom support module 6 comprises: Cylindorical rod 22, bottom base 23.Wherein: the bottom of Cylindorical rod 22 is connected with bottom base 23 by bolt, bottom base 23 is fixedly installed at the bottom of the lifting of oceanographic engineering swimmer's pool by high-strength bolt, and described driver module 3 is fixedly installed on wherein.
As shown in Figure 6, described chute module 7 comprises chute supported base 24 and chute locking device 25.Chute supported base 24 is fixed in bottom support module 6 by high-strength bolt, and chute locking device 25 and chute supported base 24 are connected to form chute with bolt.The steady brace 16 of cantilever module has rotated stabilization in chute.
As shown in Figure 7,8, described tension leg model mechanism comprises: tension leg model 26, universal joint 27, three component instrument sensor 28, sliding axle 29, web joint 30, tension leg fixture splice 31, linear bearing 32 and buffer spring 33, wherein: the two ends of tension leg fixture splice 31 are connected with tension leg model 26 one end with universal joint 27 respectively, the other end of universal joint 27 is fixedly installed on three component instrument sensors 28, three component instrument sensors 28 are fixed in linear bearing 32 one end, and are connected with buffer spring 33 with sliding axle 29 respectively.Overall tension leg stationary installation is fixed on the end of vertical cantilever by web joint 30.
As shown in Fig. 9,10, described tension leg model mechanism also comprises sleeve 19, sleeve 19 is socketed on the left end point of tension leg model and the outside of whole left part, and the tension leg model making band sleeve part not by fluid-load, thus realizes the object of simulated dual to shear flow and two-way ladder shear flow.
As shown in Figure 9, described sleeve 19 is specifically socketed on the left end point of tension leg model and the outside of left part, make the tension leg model of band sleeve part when proving installation operates not by flow action, thus realize the object of simulated dual to ladder shear flow, the fixed position of sleeve 19 and length can axially change along tension leg model, to simulate multi-form two-way ladder shear flow as required.
Making and the installation process of the present embodiment are as follows:
Before testing, first suitable model scale ratio and measurement condition is selected according to the economy of the size of oceanographic engineering swimmer's pool, the physical size of pipe fitting, the concrete condition of measurement condition and test.To require according to the strength control of whole proving installation and vibration control requires to determine concrete size and the material of modules.It is as follows that each module gets out rear concrete installation process.
Raise at the bottom of the lifting of oceanographic engineering swimmer's pool after ground assembling bottom support module 6 has been assembled, the base of bottom support module 6 is fixed by bolts at lifting the end.Then suitably reduce the lifting end and bottom cantilever arms module 4 is installed.Then the bottom support module 6 of built-in driver module 3 is bolted at the bottom of lifting platform, again the chute supported base 24 of chute module 7 is bolted in bottom support module 6, cantilever module 4 is installed again, first steel ball should be arranged on three faces that steady brace 16 contacts with chute when cantilever module 4 is installed, place cantilever stage casing again, it is made to be connected with the motor driving shaft 14 in the Cylindorical rod 21 of bottom support module, then chute locking device 25 is placed, fix with bolt between chute locking device 25 and chute supported base 24, with ring flange and bolt, outer section of cantilever is fixed on cantilever stage casing again.After fixing cantilever module 4, baffle module 5 is fixed on cantilever 17.While the above-mentioned module of installation, in ground assembling tension leg model mechanism 1, and tension leg model mechanism 1 is fixed on cantilever.Finally install and measure analysis module 2, the data line in Cylindorical rod is connected in Measurement and analysis module 2.
Computing machine in Measurement and analysis module 2 installing computer real-time analysis software and image processing software, being then connected to deriving from test pipe fitting two ends the data line come on computer.Surveying instrument in proving installation is derived the power lead come to connect with the mains simultaneously.
Integral installation completes post debugging device.Just can start proving installation according to concrete operating mode and test specification after having debugged to test.
Above specific embodiments of the invention are described.It is to be appreciated that the present invention is not limited to above-mentioned particular implementation, those skilled in the art can make various distortion or amendment within the scope of the claims, and this does not affect flesh and blood of the present invention.
Claims (10)
1. a tension leg vortex-induced vibration test device under double direction shear stream and two-way ladder shear flow, is characterized in that, comprising: tension leg model mechanism, Measurement and analysis module, driver module, cantilever module, bottom support module, baffle module and chute module; Wherein, described tension leg model mechanism is fixed in cantilever module, and described bottom support module is connected with driver module is vertical, and described driver module is connected with cantilever module is vertical; Described baffle module is fixed in cantilever module, and described chute module is fixed in bottom support module; Described cantilever module is driven by driver module and rotates, and described Measurement and analysis module arrangement is among tension leg model mechanism and cantilever module;
Described cantilever module is integral type structure.
2. tension leg vortex-induced vibration test device under double direction shear stream according to claim 1 and two-way ladder shear flow, it is characterized in that, described tension leg model mechanism comprises: tension leg model, the stiff end being arranged at tension leg model two ends and web joint; Wherein, each stiff end includes: universal joint, three component instrument sensors, sliding axle, tension leg fixture splice, linear bearing and buffer spring, the two ends of described tension leg fixture splice are connected with one end of universal joint with tension leg model respectively, the other end of described universal joint is fixedly installed on three component instrument sensors, three component instrument sensors are fixed in one end of described linear bearing, and are connected with buffer spring with sliding axle respectively; Described stiff end is fixed on the end of cantilever module by web joint.
3. tension leg vortex-induced vibration test device under double direction shear stream according to claim 2 and two-way ladder shear flow, it is characterized in that, described tension leg model mechanism also comprises sleeve, and described jacket casing is connected to one end stiff end end points of tension leg model and arranges the outside of tension leg model of this stiff end side; And/or
The ratio that linear mass and the unit length of tension leg model of described tension leg model arrange quality is 1: 1.
4. tension leg vortex-induced vibration test device under double direction shear stream according to claim 1 and two-way ladder shear flow, it is characterized in that, described Measurement and analysis module comprises: measuring unit, under water video record unit, computing unit and wireless transmission unit, wherein: described computing unit is connected with wireless transmission unit the wireless measurement signal exported for transmitting video record unit and measuring unit under water, and described computing unit carries out Storage and Processing to the wireless measurement signal received in real time.
5. tension leg vortex-induced vibration test device under double direction shear stream according to claim 1 and two-way ladder shear flow, it is characterized in that, described driver module comprises: change speed gear box, motor, driving shaft and driven wheel, wherein: the two ends of described change speed gear box are connected with driving shaft with motor respectively, described driving shaft is connected with driven wheel, and described driven wheel drives cantilever module to rotate.
6. tension leg vortex-induced vibration test device under double direction shear stream according to claim 1 and two-way ladder shear flow, it is characterized in that, described cantilever module comprises: cantilever, steady brace, the first diagonal brace and the second diagonal brace, wherein: described cantilever is divided into horizontal boom section and vertical cantilever segment, described vertical cantilever segment is by the first diagonal brace proof strength, and the end of described vertical cantilever segment is connected with tension leg model mechanism; The center of described cantilever is connected by stationary installation with bottom support module, the bottom of described cantilever with bottom stationary installation between be connected by the second diagonal brace and steady brace, the lower end of described steady brace is furnished with steel ball on the face contacted with chute module.
7. tension leg vortex-induced vibration test device under double direction shear stream according to claim 6 and two-way ladder shear flow, it is characterized in that, described cantilever adopts hollow, rectangular block structure, the internal height of described hollow, rectangular block structure is 94mm, external height is 100mm, wide is 0.6m, and horizontal span is 5m; And/or
Described horizontal boom section and vertical cantilever segment weld together.
8. tension leg vortex-induced vibration test device under double direction shear stream according to claim 6 and two-way ladder shear flow, it is characterized in that, described baffle module comprises: bottom flow-stopping plate and side flow-stopping plate; Wherein, bottom flow-stopping plate is fixed on horizontal boom section by support, and side flow-stopping plate is fixed on vertical cantilever segment.
9. tension leg vortex-induced vibration test device under double direction shear stream according to claim 1 and two-way ladder shear flow, it is characterized in that, described chute module comprises: chute supported base, chute locking device, chute supported base is bolted in bottom support module, chute locking device and chute supported base are bolted thus form annular concave chute, and cantilever module is slided in annular concave chute by steel ball.
10. tension leg vortex-induced vibration test device under double direction shear stream according to claim 1 and two-way ladder shear flow, it is characterized in that, described bottom support module comprises: Cylindorical rod and bottom base; Wherein, driver module is placed in the inside of described Cylindorical rod, and the lower weld of described Cylindorical rod is in bottom base; Described chute module is fixed on the upper end of bottom base; Described bottom base is arranged at the bottom of the lifting of oceanographic engineering swimmer's pool, and then under making double direction shear stream and two-way ladder shear flow, tension leg vortex-induced vibration test device is wholy set in oceanographic engineering swimmer's pool.
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| CN110231134A (en) * | 2019-04-04 | 2019-09-13 | 上海交通大学 | Double standpipe vortex-induced vibration test devices arranged side by side under double direction shear and ladder shear flow |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110231134A (en) * | 2019-04-04 | 2019-09-13 | 上海交通大学 | Double standpipe vortex-induced vibration test devices arranged side by side under double direction shear and ladder shear flow |
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| CN105547623B (en) | 2018-05-04 |
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