CN108052766A - A kind of double rope spacing and icing influence research method to double rope wake gallopings - Google Patents
A kind of double rope spacing and icing influence research method to double rope wake gallopings Download PDFInfo
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
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- G06F30/13—Architectural design, e.g. computer-aided architectural design [CAAD] related to design of buildings, bridges, landscapes, production plants or roads
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- G06—COMPUTING; CALCULATING OR COUNTING
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Abstract
The invention belongs to bridge technology fields, and disclose a kind of double rope spacing and icing influences research method to double rope wake gallopings, including：Establish double rope threedimensional models；Wind load is applied to double rope threedimensional models by method for numerical simulation；By finite element solving method, the galloping force coefficient curve of the lift coefficient time-history curves of double rope threedimensional models, resistance coefficient time-history curves, lower pair of omnidirectional angle rope threedimensional model aerodynamic coefficient curve and lower pair of omnidirectional angle rope threedimensional model is asked for；Wherein, double rope threedimensional models include：First rope away from the double rope models of icing oblique pull, the second rope away from the double rope models of icing oblique pull, the 3rd rope away from the double rope models of icing oblique pull and the second rope away from the double rope models of no icing oblique pull.The present invention provides a kind of double rope spacing of the stronger research of conclusion applicability and icing influences research method to double rope wake gallopings.
Description
Technical field
The present invention relates to bridge technology field, more particularly to a kind of double rope spacing and icing grind the influence of double rope wake gallopings
Study carefully method.
Background technology
Suspension cable is the important component of bridge, and because its span is larger, diameter is smaller, and suspension cable structure is with respect to bridge
For structure, rigidity is smaller, lighter weight, damping are also smaller, so being easier under wind action to generate dynamic response.It draws
The wake galloping of rope is one kind of wind-induced vibration.Wake galloping refers to two ropes that tandem is placed, under wind action, downstream
Rope can be excited be subject to upstream rope wake flow, and increase the vibration of itself, and the vibration amplitude of downstream rope continues to increase, eventually at certain
One large amplitude is issued to stable vibration, and amplitude no longer increases.
In the prior art, numerical computation method has studied the gas flow shape between cylinder model, discusses different distance situation
The dynamic effect generated by the air-flow of upstream cylinder to downstream cylinder down.The research method is more complicated and lacks the auxiliary of experiment
Help verification.The nowed forming and distance dependent of air-flow between fixed cylinder model are thought in theoretical research.The research method only considered
Single influence factor, obtained conclusion applicability be not strong.Different icing types and not are had studied using three-dimensional numerical value wind tunnel simulation
With influence of the ice covering thickness to icing drag-line galloping characteristic.It is thick that different icing are had studied using wind tunnel test and Two-dimensional numerical simulation
The aerodynamic coefficient of degree and the drag-line of different icing types demonstrates the accuracy of numerical simulation.What these research methods considered
Influence factor is not comprehensive enough and studies not deep enough.
The content of the invention
The present invention provides a kind of double rope spacing and icing influences research method to double rope wake gallopings, solves in the prior art
Double rope wake galloping research method reliabilities and it is poor for applicability the technical issues of.
The influence of double rope wake gallopings is ground in order to solve the above technical problems, the present invention provides a kind of double rope spacing and icing
Study carefully method, including：
Establish double rope threedimensional models；
Wind load is applied to double rope threedimensional models by method for numerical simulation；
By finite element solving method, when asking for lift coefficient time-history curves, the resistance coefficient of double rope threedimensional models
The galloping force coefficient of lower pair of journey curve, lower pair of omnidirectional angle rope threedimensional model aerodynamic coefficient curve and omnidirectional angle rope threedimensional model
Curve；
Wherein, double rope threedimensional models include：First rope is double away from icing oblique pull away from the double rope models of icing oblique pull, the second rope
Rope model, the 3rd rope are away from the double rope models of icing oblique pull and the second rope away from the double rope models of no icing oblique pull.
Further, the research method further includes：
By finite element solving method, the speed cloud atlas of lower pair of rope threedimensional model of typical wind angle is asked for；
Wherein, the typical wind angle is 0 ° and 90 °.
Further, in double rope threedimensional models, double ropes are arranged in parallel, the fluid flow region around selected drag-line
Domain is rectangular body region, and drag-line icing type is sector.
Further, the rectangular body region, length and width are respectively 4.5m and 3m, are highly drag-line span-wise length, drag-line
Angle of inclination is 70 °.
Further, in double rope threedimensional models,
In the case where the wind angle of attack is 0 °, double rope tandem arrangements；
In the case where the wind angle of attack is between 0 ° to 90 °, double ropes are staggered in arrangement；
In the case where the wind angle of attack is 90 °, double ropes erect row arrangement.
Further, first rope is away from for 2 times of drag-line diameters；
Second rope is away from for 4 times of drag-line diameters；
3rd rope is away from for 6 times of drag-line diameters.
Further, in double rope threedimensional models, boundary condition is defined as follows：
In the case where the wind angle of attack is 0 °, along X-axis positive direction, definition upstream fluid inlet is speed entrance, defines downstream
Fluid outlet is pressure export, and it is symmetrical border to define the corresponding upper lower wall surface of drag-line span-wise length, and cuboid the right and left is determined
Justice is free-flowing border；
In the case of between the wind angle of attack is 0 ° to 90 °, along X-axis positive direction, upstream fluid inlet and Y-direction lower boundary are defined
For speed entrance, defining downstream fluid outlet and Y-direction coboundary is pressure export, lower wall surface is defined as symmetrical border in Z-direction,
He is defined as flowing freely border；
In the case where the wind angle of attack is 90 °, along Y-axis positive direction, definition upstream fluid inlet is speed entrance, defines downstream
Fluid outlet is pressure export, and it is symmetrical border to define the corresponding upper lower wall surface of drag-line span-wise length, and cuboid the right and left is determined
Justice is free-flowing border.
Further, inlet velocity 12m/s, turbulence intensity are arranged to 3.8%, and turbulent viscosity rate is arranged to 10.
The one or more technical solutions provided in the embodiment of the present application, have at least the following technical effects or advantages：
The double rope spacing and icing provided in the embodiment of the present application influence research method to double rope wake gallopings, using numerical value
Wind-tunnel method establishes the double rope threedimensional models of fan-shaped icing and without the double rope threedimensional models of icing, carries out Numerical Wind Tunnel research, analysis is covered
Ice influences the wake gallopings of double ropes, and rope is compared and analyzed away from influence factors such as, wind angles, finishes so as to which first mate is promoted
The reliability and applicability of opinion.Research conclusion can be in Practical Project, consider cable-stayed bridge more Cable Structures side by side under cold climate
Whether need to add damper offer reference during wake galloping.
Description of the drawings
Fig. 1 be lift coefficient of the second rope provided in an embodiment of the present invention away from the double rope 0 ° of wind angle of attack of model of no icing oblique pull and
Resistance coefficient time-history curves；
Fig. 2 is lift coefficient and resistance of the first rope provided in an embodiment of the present invention away from the double rope 0 ° of wind angle of attack of model of icing oblique pull
Force coefficient time-history curves；
Fig. 3 is lift coefficient and resistance of the second rope provided in an embodiment of the present invention away from the double rope 0 ° of wind angle of attack of model of icing oblique pull
Force coefficient time-history curves；
Fig. 4 is lift coefficient and resistance of the 3rd rope provided in an embodiment of the present invention away from the double rope 0 ° of wind angle of attack of model of icing oblique pull
Force coefficient time-history curves；
Fig. 5 is aerodynamic coefficient of the second rope provided in an embodiment of the present invention away from the double rope models of the no icing oblique pull angle of attack with the wind
Change curve；
Fig. 6 is that the angle of attack becomes aerodynamic coefficient of the first rope provided in an embodiment of the present invention away from the double rope models of icing oblique pull with the wind
Change curve；
Fig. 7 is that the angle of attack becomes aerodynamic coefficient of the second rope provided in an embodiment of the present invention away from the double rope models of icing oblique pull with the wind
Change curve；
Fig. 8 is that the angle of attack becomes aerodynamic coefficient of the 3rd rope provided in an embodiment of the present invention away from the double rope models of icing oblique pull with the wind
Change curve；
Fig. 9 is the second rope provided in an embodiment of the present invention away from galloping force curve under no icing oblique pull Shuan Suo models omnidirectional angle；
Figure 10 is the first rope provided in an embodiment of the present invention away from galloping force curve under icing oblique pull Shuan Suo models omnidirectional angle；
Figure 11 is the second rope provided in an embodiment of the present invention away from galloping force curve under icing oblique pull Shuan Suo models omnidirectional angle；
Figure 12 is the 3rd rope provided in an embodiment of the present invention away from galloping force curve under icing oblique pull Shuan Suo models omnidirectional angle；
Figure 13 is speed cloud of the second rope provided in an embodiment of the present invention away from the double rope model typical case's wind angles of attack of no icing oblique pull
Figure；
Figure 14 is speed cloud atlas of the first rope provided in an embodiment of the present invention away from the double rope model typical case's wind angles of attack of icing oblique pull；
Figure 15 is speed cloud atlas of the second rope provided in an embodiment of the present invention away from the double rope model typical case's wind angles of attack of icing oblique pull；
Figure 16 is speed cloud atlas of the 3rd rope provided in an embodiment of the present invention away from the double rope model typical case's wind angles of attack of icing oblique pull.
Specific embodiment
The embodiment of the present application influences research method by providing a kind of double rope spacing and icing on double rope wake gallopings, solves
In the prior art double rope wake galloping research method reliabilities and it is poor for applicability the technical issues of.
In order to better understand the above technical scheme, in conjunction with appended figures and specific embodiments to upper
It states technical solution to be described in detail, it should be understood that the specific features in the embodiment of the present invention and embodiment are to the application skill
The detailed description of art scheme rather than the restriction to technical scheme, in the case where there is no conflict, the embodiment of the present application
And the technical characteristic in embodiment can be mutually combined.
A kind of double rope spacing and icing influence research method to double rope wake gallopings, including：
Establish double rope threedimensional models；
Wind load is applied to double rope threedimensional models by method for numerical simulation；
By finite element solving method, when asking for lift coefficient time-history curves, the resistance coefficient of double rope threedimensional models
The galloping force coefficient of lower pair of journey curve, lower pair of omnidirectional angle rope threedimensional model aerodynamic coefficient curve and omnidirectional angle rope threedimensional model
Curve.
Wherein, double rope threedimensional models include：First rope is double away from icing oblique pull away from the double rope models of icing oblique pull, the second rope
Rope model, the 3rd rope are away from the double rope models of icing oblique pull and the second rope away from the double rope models of no icing oblique pull；And it is threedimensional model.
That is, by Numerical Wind Tunnel method, the double rope models of icing oblique pull are established respectively and without the double Suo Mo of icing oblique pull
Type carries out contrast test, to different ropes away from the double rope of fan-shaped icing and the Flow Field of the double ropes of icing carries out Three-dimensional simulation,
Resistance coefficient, lift coefficient and galloping force coefficient of the downstream rope under 0 °~90 ° wind angles of attack are obtained, and then between two ropes of research
Distance, the wind angle of attack and whether there is influence of the conditions such as icing to double rope wake galloping stability.It can rapidly be obtained by comparison
Know influence of the various influence factors to double rope wake gallopings.
Further, the research method further includes：By finite element solving method, lower pair of rope three of typical wind angle is asked for
The speed cloud atlas of dimension module；
In general, typical case's wind angle is 0 ° and 90 °.
The present embodiment provides a kind of specific analog study scheme, for illustrating.
In double rope threedimensional models, double ropes are arranged in parallel, and the fluid flow region around selected drag-line is rectangular
Body region, drag-line icing type are sector.
The rectangular body region, length and width are respectively 4.5m and 3m, are highly drag-line span-wise length, the angle of inclination of drag-line is
70°。
Further, in double rope threedimensional models in the case where the wind angle of attack is 0 °, double rope tandem arrangements；In wind
In the case that the angle of attack is between 0 ° to 90 °, double ropes are staggered in arrangement；In the case where the wind angle of attack is 90 °, double ropes erect row arrangement.
In general, wind conversion range of angle of attack takes 0 °~90 °, the wind angle of attack is incremented by with 5 ° when simulation calculates.
In the present embodiment, first rope is away from for 2 times of drag-line diameters；Second rope is away from for 4 times of drag-line diameters；Described
Three ropes are away from for 6 times of drag-line diameters.
It is, as 240mm, 480mm, 720mm.
Progress grid stroke in region is streamed to each fan-shaped icing drag-line model and without icing drag-line model using structured grid
Point, since fan-shaped icing both sides are there are sharp angle point and the precision for calculating, herein using outer O shapes mesh generation technology
Grid around two ropes in 4 times of drag-line area of section regions is encrypted, to boundary layer radial grid use from outside to
Interior gradually encrypted mode, mesh refinement coefficient is 1.05, to the grid beyond boundary layer without encryption.
Further, in double rope threedimensional models, boundary condition is defined as follows：
In the case where the wind angle of attack is 0 °, along X-axis positive direction, definition upstream fluid inlet is speed entrance, defines downstream
Fluid outlet is pressure export, and it is symmetrical border to define the corresponding upper lower wall surface of drag-line span-wise length, and cuboid the right and left is determined
Justice is free-flowing border；
In the case of between the wind angle of attack is 0 ° to 90 °, along X-axis positive direction, upstream fluid inlet and Y-direction lower boundary are defined
For speed entrance, defining downstream fluid outlet and Y-direction coboundary is pressure export, lower wall surface is defined as symmetrical border in Z-direction,
He is defined as flowing freely border；
In the case where the wind angle of attack is 90 °, along Y-axis positive direction, definition upstream fluid inlet is speed entrance, defines downstream
Fluid outlet is pressure export, and it is symmetrical border to define the corresponding upper lower wall surface of drag-line span-wise length, and cuboid the right and left is determined
Justice is free-flowing border.
Inlet velocity is 12m/s, and turbulence intensity is arranged to 3.8%, and turbulent viscosity rate is arranged to 10.
In FLUENT solves software, threedimensional model is set to solve, selects the solver based on pressure application, the time elects wink as
State using SST k- ω (Shear Stress Transport k- ω) turbulence model, in boundary condition, sets incoming
Speed and direction, with SIMPLEC algorithms, momentum, tubulence energy use Second-order Up-wind form, pressure, density, muscle power than dissipating
And momentum is monitored lift coefficient and resistance coefficient, time step and is taken 0.001s using acquiescence, obtain lift coefficient in 0.5s,
Resistance coefficient time-history curves.
Comparison test analysis below by above-mentioned concrete scheme illustrates the application.
Referring to Fig. 1, Fig. 2, Fig. 3 and Fig. 4, using FLUENT softwares respectively to rope away from for 4 times of diameter of wire cords not the double ropes of icing, rope away from
For the double Suo Jinhang numerical simulations of 2 times, 4 times and 6 times diameter of wire cord icing, the resistance coefficient and lift of 0 ° of wind angle of attack of obtained contrast model
Coefficient time-history curves.
In 0 ° of wind angle of attack, lift coefficient near 0 substantially in cyclically-varying, for rope away from for 2 times of diameter of wire cord icing it is double
Rope, since rope is away from relatively closely, downstream rope is apparent by the wake effect of upstream rope, and the amplitude of lift coefficient has increased trend；It is and right
In rope away from for 4 times of diameter of wire cords not icing, rope away from for 4 times of ropes away from and the double ropes of 6 times of diameter of wire cord icing, lift coefficient is near 0 in stable
Cyclically-varying.For rope away from for 4 times of diameter of wire cords not double ropes of icing, as the time elapses, resistance coefficient is substantially constant left 0.4
It is right；For rope away from for the double ropes of 2 times of diameter of wire cord icing, resistance coefficient is substantially constant -0.3 or so；For rope away from for 4 times of diameter of wire cord icing
Double ropes, the trend that resistance coefficient presentation is gradually reduced, there is the trend stablized 0 or so；It is double away from 6 times of diameter of wire cord sector icing for rope
Rope, resistance coefficient version is more complicated, overall presentation downward trend, last substantially constant 0.5 or so.In comparison diagram
Four figures, which can be seen that the spacing whetheing there is between icing and drag-line, influences substantially lift coefficient and resistance coefficient time-history curves.
Referring to Fig. 5, Fig. 6, Fig. 7 and Fig. 8, during by the resistance coefficient and lift coefficient of 0 °~90 ° of the threedimensional model
Journey curve is averaged, and obtains the changing rule of the average resistance coefficient and average lift coefficient, the with the wind angle of attack under all angles.
Rope away from for 4 times of diameter of wire cords, the shape of a rising is not presented substantially for the double ropes of icing, average resistance coefficient curve, 0 °~
Between 20 °, rising drastically is presented in average resistance coefficient, between 20 °~90 °, average resistance coefficient rise must than shallower,
And the state of a rising is presented in average lift coefficient between 0 °~10 °, and gentle downward trend is presented between 10 °~35 °,
Fall increases between 35 °~75 °, changes between 75 °~90 ° little；For rope away from for 2 times of diameter of wire cord sector icing it is double
Rope, average resistance coefficient coefficient keep lasting growth trend between 0 °~90 °, and average lift coefficient 0 °~15 ° it
Between, held stationary state, between 15 °~35 °, the increase at lift coefficient box haul angle is increasing, 35 °~60 ° it
Between decline, between 60 °~90 °, lift coefficient changes little with the increase of angle；For rope away from for 4 times of diameter of wire cord sector icing
Double ropes, average resistance coefficient curve is in shape low between the senior middle school of both ends, in fluctuation status between 0 °~35 °, at 35 °~50 °
Between drastically decline, constantly rise between 50 ° to 90 °, and for lift coefficient, it is slightly lower to be presented both ends, intermediate high
The state of rising is presented in massif shape between 0 °~30 °, at 30 °~65 ° in fluctuation status, under gentle between 65 °~90 °
Drop；For 6 times of diameter of wire cord ropes away from the double ropes of fan-shaped icing, resistance coefficient rises between 0 °~20 °, declines between 20 °~40 °,
Between 40 °~90 °, the trend gently risen is presented in resistance coefficient, and for lift coefficient, between 0 °~15 °, in rising
State between 15 °~60 °, is presented fluctuation status, between 60 °~90 °, gently dipping trend is presented.
Aerodynamic coefficient between 0 ° of threedimensional model model~90 ° of wind angles is compared to each other, and the aerodynamic force in four figures becomes
Change curve there are larger difference, the wake galloping resistance coefficient and lift coefficient average value for illustrating downstream rope are covered by double Suo Youwu
Effect of distance between ice and the double ropes of tandem is larger.
Referring to Fig. 9, Figure 10, Figure 11 and Figure 12, the galloping force coefficient curve of the threedimensional model three-dimensional simulation under omnidirectional angle.
By Fig. 9 and Figure 12 as it can be seen that rope without icing and rope for 4 times of diameter of wire cords away from the downstream rope for the double ropes of 6 times of diameter of wire cord icing away from existing
Both greater than 0 under the full angle of attack, galloping will not occur.
As seen from Figure 10, rope away from the downstream rope for the double ropes of 2 times of diameter of wire cord icing in 0 °, 5 °, 10 ° of wind angles of attack, galloping power system
Number both less than 0, the possibility that galloping occurs is larger.
As seen from Figure 11, rope is attacked away from the downstream rope for the double ropes of 4 times of diameter of wire cord icing in 45 °, 50 °, 55 °, 60 °, 65 °, 70 ° of wind
During angle, galloping force coefficient is both less than 0, and the possibility that galloping occurs is larger.
Referring to Figure 13, Figure 14, Figure 15 and Figure 16, in 0 °, 90 ° of wind angles of attack, synchronization drag-line spacing for 4 times of diameter of wire cords without
The double ropes of icing, drag-line spacing open up the speed that section is monitored to height Z=300mm for the double ropes of 2 times, 4 times and 6 times diameter of wire cord sector icing
Cloud atlas.
As can be seen that VELOCITY DISTRIBUTION and the double ropes of icing without the double ropes of icing are poor in the speed cloud atlas of 0 ° of wind angle of attack contrast model
Different larger, for the double ropes of no icing due to windward side smoother, the wind speed of drag-line both sides is smaller compared with icing drag-line and does not show
Apparent wake flow whirlpool Alternate Phenomenon.Rope comes off shape away from the VELOCITY DISTRIBUTION cloud atlas for the double ropes of 2 times, 4 times and 6 times diameter of wire cord icing and wake flow
There are larger differences for state, it can be seen that, there is very big influence to drag-line VELOCITY DISTRIBUTION in icing and drag-line spacing.From 90 ° of wind
Under the angle of attack VELOCITY DISTRIBUTION cloud atlas of contrast model can be seen that downstream rope show with VELOCITY DISTRIBUTION as the rope phase of upstream because
During 90 ° of wind angles of attack, downstream rope is no longer influenced by the influence of upstream rope wake flow.
The one or more technical solutions provided in the embodiment of the present application, have at least the following technical effects or advantages：
The double rope spacing and icing provided in the embodiment of the present application influence research method to double rope wake gallopings, using numerical value
Wind-tunnel method establishes the double rope threedimensional models of fan-shaped icing and without the double rope threedimensional models of icing, carries out Numerical Wind Tunnel research, analysis is covered
Ice influences the wake gallopings of double ropes, and rope is compared and analyzed away from influence factors such as, wind angles, finishes so as to which first mate is promoted
The reliability and applicability of opinion.Research conclusion can be in Practical Project, consider cable-stayed bridge more Cable Structures side by side under cold climate
Whether need to add damper offer reference during wake galloping.
It should be noted last that more than specific embodiment is merely illustrative of the technical solution of the present invention and unrestricted,
Although the present invention is described in detail with reference to example, it will be understood by those of ordinary skill in the art that, it can be to the present invention
Technical solution be modified or replaced equivalently, without departing from the spirit and scope of technical solution of the present invention, should all cover
Among scope of the presently claimed invention.
Claims (8)
1. a kind of double rope spacing and icing influence research method to double rope wake gallopings, which is characterized in that including：
Establish double rope threedimensional models；
Wind load is applied to double rope threedimensional models by method for numerical simulation；
By finite element solving method, lift coefficient time-history curves, the resistance coefficient time-histories for asking for double rope threedimensional models are bent
The galloping force coefficient of line, lower pair of omnidirectional angle rope threedimensional model aerodynamic coefficient curve and lower pair of omnidirectional angle rope threedimensional model is bent
Line；
Wherein, double rope threedimensional models include：First rope is away from the double rope models of icing oblique pull, the second rope away from the double Suo Mo of icing oblique pull
Type, the 3rd rope are away from the double rope models of icing oblique pull and the second rope away from the double rope models of no icing oblique pull.
2. double rope spacing as described in claim 1 and icing influence research method to double rope wake gallopings, which is characterized in that institute
Research method is stated to further include：
By finite element solving method, the speed cloud atlas of lower pair of rope threedimensional model of typical wind angle is asked for；
Wherein, the typical wind angle is 0 ° and 90 °.
3. double rope spacing as described in claim 1 and icing influence research method to double rope wake gallopings, it is characterised in that：
In double rope threedimensional models, double ropes are arranged in parallel, and the fluid flow region around selected drag-line is cuboid area
Domain, drag-line icing type are sector.
4. double rope spacing as claimed in claim 3 and icing influence research method to double rope wake gallopings, it is characterised in that：Institute
Rectangular body region is stated, length and width are respectively 4.5m and 3m, are highly drag-line span-wise length, and the angle of inclination of drag-line is 70 °.
5. double rope spacing as described in claim 1 and icing influence research method to double rope wake gallopings, it is characterised in that：
In double rope threedimensional models,
In the case where the wind angle of attack is 0 °, double rope tandem arrangements；
In the case where the wind angle of attack is between 0 ° to 90 °, double ropes are staggered in arrangement；
In the case where the wind angle of attack is 90 °, double ropes erect row arrangement.
6. double rope spacing as described in claim 1 and icing influence research method to double rope wake gallopings, it is characterised in that：
First rope is away from for 2 times of drag-line diameters；
Second rope is away from for 4 times of drag-line diameters；
3rd rope is away from for 6 times of drag-line diameters.
7. double rope spacing as claimed in claim 3 and icing influence research method to double rope wake gallopings, which is characterized in that institute
It states in double rope threedimensional models, boundary condition is defined as follows：
In the case where the wind angle of attack is 0 °, along X-axis positive direction, definition upstream fluid inlet is speed entrance, defines downstream fluid
It exports as pressure export, it is symmetrical border to define the corresponding upper lower wall surface of drag-line span-wise length, and cuboid the right and left is defined as
Flow freely border；
In the case of between the wind angle of attack is 0 ° to 90 °, along X-axis positive direction, upstream fluid inlet and Y-direction lower boundary are defined as speed
Entrance is spent, it is pressure export to define downstream fluid outlet and Y-direction coboundary, and lower wall surface is defined as symmetrical border in Z-direction, other are fixed
Justice is free-flowing border；
In the case where the wind angle of attack is 90 °, along Y-axis positive direction, definition upstream fluid inlet is speed entrance, defines downstream fluid
It exports as pressure export, it is symmetrical border to define the corresponding upper lower wall surface of drag-line span-wise length, and cuboid the right and left is defined as
Flow freely border.
8. double rope spacing as claimed in claim 7 and icing influence research method to double rope wake gallopings, it is characterised in that：Into
Mouth speed is 12m/s, and turbulence intensity is arranged to 3.8%, and turbulent viscosity rate is arranged to 10.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109522648A (en) * | 2018-11-16 | 2019-03-26 | 重庆科技学院 | It is a kind of consider movement aerodynamic force wake flow under flexibly support cylinder galloping analysis method |
| CN111428434A (en) * | 2020-04-10 | 2020-07-17 | 山东大学 | Numerical simulation method and system for object falling in ocean current |
| CN113204821A (en) * | 2021-05-06 | 2021-08-03 | 重庆科技学院 | Method for establishing tandem double-cylinder wake flow oscillation unsteady aerodynamic force mathematical model |
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| CN109522648B (en) * | 2018-11-16 | 2022-04-05 | 重庆科技学院 | Elastic support cylindrical relaxation vibration analysis method under wake flow considering motion aerodynamic force |
| CN111428434A (en) * | 2020-04-10 | 2020-07-17 | 山东大学 | Numerical simulation method and system for object falling in ocean current |
| CN111428434B (en) * | 2020-04-10 | 2022-07-01 | 山东大学 | Numerical simulation method and system for object falling in ocean current |
| CN113204821A (en) * | 2021-05-06 | 2021-08-03 | 重庆科技学院 | Method for establishing tandem double-cylinder wake flow oscillation unsteady aerodynamic force mathematical model |
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