CN110513413A - The adjustable spring arrangement of frequency in a kind of bridge health test and diagnostics wind tunnel test - Google Patents
The adjustable spring arrangement of frequency in a kind of bridge health test and diagnostics wind tunnel test Download PDFInfo
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- CN110513413A CN110513413A CN201910756935.5A CN201910756935A CN110513413A CN 110513413 A CN110513413 A CN 110513413A CN 201910756935 A CN201910756935 A CN 201910756935A CN 110513413 A CN110513413 A CN 110513413A
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- China
- Prior art keywords
- vacuum glass
- spring
- glass plug
- arrangement
- wind tunnel
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F1/00—Springs
- F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
- F16F1/04—Wound springs
- F16F1/12—Attachments or mountings
- F16F1/121—Attachments or mountings adjustable, e.g. to modify spring characteristics
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/08—Aerodynamic models
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2222/00—Special physical effects, e.g. nature of damping effects
- F16F2222/02—Special physical effects, e.g. nature of damping effects temperature-related
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2224/00—Materials; Material properties
- F16F2224/02—Materials; Material properties solids
- F16F2224/0258—Shape-memory metals, e.g. Ni-Ti alloys
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2228/00—Functional characteristics, e.g. variability, frequency-dependence
- F16F2228/06—Stiffness
- F16F2228/066—Variable stiffness
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
The invention discloses the adjustable spring arrangements of frequency in a kind of bridge health test and diagnostics wind tunnel test, including outsourcing sleeve arrangement, the outsourcing sleeve arrangement is internally provided with spring, temperature-controlling system is provided between spring inside outsourcing sleeve arrangement, the spring is made of shape memory alloy material, the outsourcing sleeve arrangement is made of silicon rubber sleeve, rigid plastic shell and vacuum glass plug, silicon rubber sleeve is provided in the rigid plastic shell, outsourcing sleeve arrangement both ends are provided with vacuum glass plug.The present invention can realize that bridge health test and diagnostics erect continuously adjusting for curved rigidity and torsion stiffness by control temperature, easily change the vibration frequency of Segment Model in wind tunnel test.
Description
Technical field
The invention belongs to accurate measuring technique field, in particular to frequency is adjustable in a kind of bridge health test and diagnostics wind tunnel test
Spring arrangement.
Background technique
Currently, China's infrastructure is in palmy days, and the transportation business including highway and railway is rapidly sent out
Exhibition, has thus largely pushed the innovation and progress of bridge construction, while also proposing to the design and construction of modern bridge
Higher requirement.Since the wind of U.S.'s Tacoma bridge in 1940 ruins accident, Bridge Design person increasingly focuses on wind to bridge
Beam action, wind tunnel test are research bridges to research technique most basic in the static state and dynamic response of wind, can measure bridge
The important parameters such as aerodynamic derivative, aerodynamic admittance and Pressures there is very important guidance to anticipate the design of Loads of Long-span Bridges
Justice.Wind tunnel laboratory is had in Duo Suo colleges and universities, China and research institute, provides support for experimental study.
Clearly as the bridge scale of construction is huge, scaled model can only be made according to a certain percentage according to its feature and carries out wind-tunnel
Test；In addition, since bridge has biggish scale in one direction, (i.e. lengthwise dimension is much larger than width and short transverse
Size), wind meets strip theory to bridge beam action approximation, therefore the sound for generally one section of bridge section only being taken to study full-bridge to wind
It answers, i.e. lumbar spondylolysis.
In aerodynamic derivative, aerodynamic admittance and flutter, the Vortex-excited vibration response of measurement bridge structure, elasticity is generallyd use
Lumbar spondylolysis is hung, i.e., Segment Model is suspended in wind-tunnel by spring and support device.The effect of spring arrangement removes
Except suspended model, it is often more important that provided for Segment Model and erect curved rigidity and torsion stiffness, and then control the vibration of Segment Model
Dynamic frequency, spring stiffness by itself is bigger, then erects curved rigidity and torsion stiffness when other conditions are identical for what Segment Model provided
Bigger, the vibration frequency of model is also bigger.Obviously, different bridges are under same wind speed ratio or same bridge is under different wind speed ratios
Possessed vibration frequency be it is different, it is just inevitable in order to which setting meets the rigidity of its feature in each wind tunnel test
It needs to make and tests the spring arrangement to match every time, so not only cumbersome, a large amount of manpower of consuming, but also once test
The spring used can not be utilized again by other tests, and economy is bad.Therefore, it is necessary to one kind can convenient adjusting Segment Model vibration
The spring arrangement of dynamic frequency is realized in different segment model wind tunnel test and shares a set of spring arrangement.
Summary of the invention
Goal of the invention: in view of the foregoing drawbacks, it is adjustable that the present invention provides frequency in a kind of bridge health test and diagnostics wind tunnel test
Spring arrangement adjusts rigidity using shape memory alloy material temperature characterisitic in bridge health test and diagnostics wind tunnel test, convenient
Ground adjusts Segment Model to required vibration frequency, it can be achieved that sharing a set of spring arrangement in different segment model wind tunnel test.
Technical solution: the present invention proposes the adjustable spring arrangement of frequency in a kind of bridge health test and diagnostics wind tunnel test, including
Outsourcing sleeve arrangement, the outsourcing sleeve arrangement are internally provided with spring, are provided between spring inside outsourcing sleeve arrangement
Temperature-controlling system, the spring are made of shape memory alloy material, and the outsourcing sleeve arrangement is by silicon rubber sleeve, rigid plastics
Shell and vacuum glass plug are constituted, and are provided with silicon rubber sleeve, outsourcing sleeve arrangement both ends in the rigid plastic shell
It is provided with vacuum glass plug.
Wherein the elasticity modulus of shape memory alloy material influences volume content by material internal martensitic phase, with material
The promotion of material temperature degree undergoes phase transition reaction inside shape memory alloy material, and martensite is converted to austenite, martensitic phase
Content is declined, the elasticity modulus of material increases with it, and the rigidity for macroscopically showing as shape memory alloy spring increases, at it
When his condition is identical for Segment Model provide it is bigger erect curved rigidity and torsion stiffness, and then improve the vibration frequency of model.Silicon
The excellent thermal insulation of rubber bush makes the heat of sleeve inner be difficult to dissipate outward, ensure that the temperature of shape memory alloy spring
Degree is stablized, and silicon rubber sleeve surrounds internal heating wire, and the insulating properties of silicon rubber ensure that heating wire is not leaked to cartridge exterior
Electricity does not produce under high-temperature situation in addition, its tolerable temperature up to 200~250 DEG C, can satisfy the requirement of test set temperature
Toxigenicity, it is ensured that the safety of test；The closely connected outside together in silicon rubber sleeve of rigid plastic shell is played silicon rubber sleeve and is protected
Shield effect, prevents the unfavorable factors such as the ultraviolet light in environment from making silicon rubber aging, enhances the durability of silicon rubber sleeve, has both anti-
It falls, is dust-proof, waterproof function, extending service life of the invention.
Further, the temperature-controlling system part includes heating wire, temperature sensor and data-interface, and the heating wire is set
It sets on the inside of silicon rubber sleeve and is arranged in spring surrounding, outsourcing sleeve arrangement bottom is provided with data-interface, the temperature
Sensor is spent to be arranged on silicon rubber sleeve lining.Wherein heating wire generates heat after power interface energization, promotes shape note
The temperature for recalling alloy spring promotes it to undergo phase transition reaction, spring rate is caused to change；Temperature sensor measures spring in real time
Temperature inside device, and transferred data in computer by data-interface, testing crew is according to spring needed for test
Corresponding target temperature is arranged in rigidity in a computer, and computer passes through the comparison of Current Temperatures and target temperature, automatic adjustment
The heating power of heating wire is achieved in inside spring arrangement and reaches expected temperature.
Further, there are twice part annular protrusion, the silicon rubber sleeve and rigid plastics on the outside of vacuum glass plug
Shell is reserved with an annular groove, and the twice part annular protrusion is respectively embedded into from inside to outside in silicon rubber sleeve and hard
In the annular groove of matter plastic shell.Thus the connectivity for enhancing vacuum glass plug and they, prevents vacuum glass plug in device
It is slipped when work.The both ends for having duct to make shape memory alloy spring in the middle part of vacuum glass plug extend there through, and aperture and spring silk are straight
Diameter is adapted, to reduce inner air and outer air circulation, the duct inner wall smooth of upper vacuum glass plug, in favor of when camber of spring and sleeve
Relative motion, reduce the influence that friction generates, the duct of lower vacuum glass plug sealed with sealant, is fixed on whole device
On spring silk, internal cavities vacuum pumping when vacuum glass plug produces is conducive to control to reduce the outside dissipation of sleeve inner heat
The stabilization of temperature.
Further, the vacuum glass plug is made of upper vacuum glass plug and lower vacuum glass plug, the upper vacuum glass
The setting of glass plug sets top center in outer jacket wound packages, and the lower vacuum glass plug is arranged among outer jacket cylinder bottom of device, institute
State both ends of the spring duct in the middle part of upper vacuum glass plug and lower vacuum glass plug.
Further, the spring is external, is provided with insulating protection net between upper vacuum glass plug and lower vacuum glass plug.
Further, outsourcing sleeve arrangement bottom is provided with power interface.
The present invention by adopting the above technical scheme, has the advantages that
(1) by control temperature, realize that wind tunnel test Bridge Segment Model erects the continuous tune of curved rigidity and torsion stiffness
Section, vibration frequency that is convenient, safely, effectively changing Segment Model；
(2) it realizes in different segment model wind tunnel test, shares a set of spring arrangement, good economy performance.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is schematic diagram of internal structure of the invention；
Fig. 3 is the schematic diagram of internal structure of vacuum glass plug in Fig. 2；
Fig. 4 is the use environment figure of apparatus of the present invention in specific embodiment.
Have in figure: shape memory alloy spring 1, heating wire 2, temperature sensor 3, power interface 4, data-interface 5, silicon rubber
Rubber sleeve 6, upper vacuum glass plug 8, lower vacuum glass plug 9, insulating protection net 10, Segment Model 11, hangs rigid plastic shell 7
Hang connecting rod 12, spring arrangement 13 of the invention, wind tunnel laboratory 14.
Specific embodiment
Combined with specific embodiments below, the present invention is furture elucidated, it should be understood that these embodiments are merely to illustrate the present invention
Rather than limit the scope of the invention, after the present invention has been read, those skilled in the art are to various equivalences of the invention
The modification of form falls within the application range as defined in the appended claims.
As shown in Figure 1, 2, the adjustable spring arrangement of frequency in a kind of bridge health test and diagnostics wind tunnel test, including shape memory
Alloy spring 1, heating wire 2, temperature sensor 3, power interface 4, data-interface 5, silicon rubber sleeve 6, rigid plastic shell 7,
Upper vacuum glass plug 8, lower vacuum glass plug 9, insulating protection net 10；As shown in figure 4, use environment of the invention, including segment
Model 11, suspension connecting rod 12, spring arrangement 13 of the invention, wind tunnel laboratory 14；
The shape memory alloy spring 1 is made of shape memory alloy material, is influenced by the fever of heating wire 2, material
Temperature is promoted, and reaction is undergone phase transition inside shape memory alloy material, and martensite relative amount declines, the elasticity modulus of material with
Increase, the rigidity for macroscopically showing as shape memory alloy spring 1 increases, mentions when other conditions are identical for Segment Model 11
Curved rigidity and torsion stiffness are erected for bigger, and then improves the vibration frequency of Segment Model 11；The bullet of shape memory alloy spring 1
Property spiral section should be arranged in lower 2/3rds sections of sleeve, spiral section will not touch sleeve when ensuring that elastic elongation occurs for spring
Upper end；
The heating wire 2 is the heat producing components of the present apparatus, the surrounding of shape memory alloy spring 1 is disposed circumferentially, in electricity
Source interface 4 generates heat after being powered, promote the temperature of shape memory alloy spring 1, promote it to undergo phase transition reaction, cause spring
Stiffness variation；
The temperature sensor 3 is fixed on the inner wall of silicon rubber sleeve 6, measures the temperature inside spring arrangement in real time,
And transferred data in computer by data-interface 5, computer needs testing crew according to spring rate needed for test
Corresponding target temperature is set, by the comparison of Current Temperatures and target temperature, automatically adjusts the heating power of heating wire 2, by
This, which is realized, reaches expected temperature inside spring arrangement；
The silicon rubber sleeve 6 is located on the outside of heating wire 2, it is desirable that there is thermal insulation, insulating properties and heat resistance, so that
The heat of sleeve inner is difficult to dissipate outward, guarantee shape memory alloy spring 1 temperature stablize, ensure that heating wire 2 not to
Cartridge exterior electric leakage, tolerable temperature can satisfy the requirement of test set temperature, do not generate toxicity under high-temperature situation, it is ensured that examination
Test safety；
It is unfavorable that the rigid plastic shell 7 fits closely ultraviolet light prevented in environment in the outside of silicon rubber sleeve 6 etc.
Factor makes silicon rubber aging, enhances the durability of silicon rubber sleeve 6, has both shatter-resistant, the function of waterproof, extend use of the invention
Service life；
There is twice part annular protrusion on the outside of the upper vacuum glass plug 8, lower vacuum glass plug 9, when assembling outsourcing sleeve
Be respectively embedded into the reserved annular groove of silicon rubber sleeve 6 and rigid plastic shell 7, thus enhance vacuum glass plug and they
Connectivity prevents vacuum glass plug 8,9 from slipping during operation of the device；8,9 middle part of vacuum glass plug has duct to close shape memory
The both ends of golden spring 1 extend there through, and aperture and spring filament diameter are adapted, to reduce inner air and outer air circulation, upper vacuum glass plug 8
Duct inner wall smooth, relative motion when in favor of camber of spring reduce the influence that friction generates, the hole of lower vacuum glass plug 9
Road is sealed with sealant, is fixed on whole device on spring silk；Internal cavities vacuum pumping when vacuum glass plug 8,9 produces, with
The outside dissipation of sleeve inner heat is reduced, conducive to the stabilization of control temperature；
The insulating protection net 10 is fixed on the outside of shape memory alloy spring 1, by shape memory alloy spring 1 and electricity
Heated filament 2 separates, and prevents heating wire 2 from leaking electricity when working to spring；
The two sides of the Segment Model 11 be fixed on suspension connecting rod 12 on, hang connecting rod 12 both ends up and down and this
The spring arrangement 13 of invention is connected, and is hung in wind tunnel laboratory 14 by spring arrangement 13 of the invention；
The Segment Model 12 can do vertical and twisting vibration in wind tunnel laboratory 14, erect curved rigidity and torsion stiffness by
Spring arrangement 13 of the invention provides, and rigidity is adjustable；
Corresponding relationship between 13 temperature of spring arrangement and spring rate of the invention should be produced in spring arrangement to be made
It is fixed that half-mark is carried out after making, for instructing subsequent wind tunnel test；
The wind tunnel laboratory 14 is the place that bridge health test and diagnostics wind tunnel test carries out, and that invents in this patent is all interior
Appearance is used to bridge health test and diagnostics wind tunnel test；
Embodiments of the present invention are described in detail in conjunction with attached drawing above, but the present invention is not limited to described reality
Apply mode.For those of ordinary skill in the art, in the range of the principle of the present invention and technical idea, to these implementations
Mode carries out a variety of variations of embodiment progress, modification, replacement and deformation and still falls in protection scope of the present invention.
Claims (6)
1. the adjustable spring arrangement of frequency in a kind of bridge health test and diagnostics wind tunnel test, which is characterized in that cover wound packages including outsourcing
It sets, the outsourcing sleeve arrangement is internally provided with spring, is provided with temperature-controlling system between spring inside outsourcing sleeve arrangement, institute
It states spring to be made of shape memory alloy material, the outsourcing sleeve arrangement is by silicon rubber sleeve, rigid plastic shell and vacuum
Glass stopper is constituted, and is provided with silicon rubber sleeve in the rigid plastic shell, outsourcing sleeve arrangement both ends are provided with vacuum
Glass stopper.
2. the adjustable spring arrangement of frequency in a kind of bridge health test and diagnostics wind tunnel test according to claim 1, feature
It is, the temperature-controlling system part includes heating wire, temperature sensor and data-interface, and the heating wire is arranged in silicone rubber sleeve
Cylinder inside is simultaneously arranged in spring surrounding, and outsourcing sleeve arrangement bottom is provided with data-interface, the temperature sensor setting
On silicon rubber sleeve lining.
3. the adjustable spring arrangement of frequency in a kind of bridge health test and diagnostics wind tunnel test according to claim 1, feature
It is there is twice part annular protrusion on the outside of vacuum glass plug, the silicon rubber sleeve and rigid plastic shell are reserved with
One annular groove, twice part annular protrusion are respectively embedded into from inside to outside in silicon rubber sleeve and rigid plastic shell
In annular groove.
4. the adjustable spring arrangement of frequency in a kind of bridge health test and diagnostics wind tunnel test according to claim 3, feature
It is, the vacuum glass plug is made of upper vacuum glass plug and lower vacuum glass plug, and the upper vacuum glass plug setting is outside
Jacket wound packages sets top center, and the lower vacuum glass plug is arranged among outer jacket cylinder bottom of device, and the both ends of the spring is worn
Cross duct in the middle part of vacuum glass plug and lower vacuum glass plug.
5. the adjustable spring arrangement of frequency in a kind of bridge health test and diagnostics wind tunnel test according to claim 4, feature
It is, the spring is external, is provided with insulating protection net between upper vacuum glass plug and lower vacuum glass plug.
6. the adjustable spring arrangement of frequency in a kind of bridge health test and diagnostics wind tunnel test according to claim 1, feature
It is, outsourcing sleeve arrangement bottom is provided with power interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910756935.5A CN110513413A (en) | 2019-08-16 | 2019-08-16 | The adjustable spring arrangement of frequency in a kind of bridge health test and diagnostics wind tunnel test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910756935.5A CN110513413A (en) | 2019-08-16 | 2019-08-16 | The adjustable spring arrangement of frequency in a kind of bridge health test and diagnostics wind tunnel test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110513413A true CN110513413A (en) | 2019-11-29 |
Family
ID=68626275
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910756935.5A Pending CN110513413A (en) | 2019-08-16 | 2019-08-16 | The adjustable spring arrangement of frequency in a kind of bridge health test and diagnostics wind tunnel test |
Country Status (1)
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| CN (1) | CN110513413A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01105035A (en) * | 1987-10-15 | 1989-04-21 | Fuji Rubber Kk | Vibro-isolating rubber |
| CN105805227A (en) * | 2016-01-19 | 2016-07-27 | 南京航空航天大学 | Variable-frequency wire mesh rubber vibration isolator and manufacturing method of parts of rubber vibration isolator |
| US20170204927A1 (en) * | 2016-01-19 | 2017-07-20 | Steering Solutions Ip Holding Corporation | Ball screw assembly for spring downforce actuator adjustment |
| CN106989131A (en) * | 2017-04-10 | 2017-07-28 | 北京航空航天大学 | A kind of SMA point of big stroke of valve sleeve actively adjusts damper |
| CN107314073A (en) * | 2017-06-27 | 2017-11-03 | 西安交通大学 | Intelligent vibration damping device and the course of work based on SMA variable rate springs |
| CN206772548U (en) * | 2017-03-24 | 2017-12-19 | 西南交通大学 | A kind of lower bridge subsection flow tunnel testing device of skew wind effect |
| CN109765120A (en) * | 2019-03-12 | 2019-05-17 | 西安建筑科技大学 | A kind of heating and heat-insulating device of silk material thermodynamic test |
-
2019
- 2019-08-16 CN CN201910756935.5A patent/CN110513413A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01105035A (en) * | 1987-10-15 | 1989-04-21 | Fuji Rubber Kk | Vibro-isolating rubber |
| CN105805227A (en) * | 2016-01-19 | 2016-07-27 | 南京航空航天大学 | Variable-frequency wire mesh rubber vibration isolator and manufacturing method of parts of rubber vibration isolator |
| US20170204927A1 (en) * | 2016-01-19 | 2017-07-20 | Steering Solutions Ip Holding Corporation | Ball screw assembly for spring downforce actuator adjustment |
| CN206772548U (en) * | 2017-03-24 | 2017-12-19 | 西南交通大学 | A kind of lower bridge subsection flow tunnel testing device of skew wind effect |
| CN106989131A (en) * | 2017-04-10 | 2017-07-28 | 北京航空航天大学 | A kind of SMA point of big stroke of valve sleeve actively adjusts damper |
| CN107314073A (en) * | 2017-06-27 | 2017-11-03 | 西安交通大学 | Intelligent vibration damping device and the course of work based on SMA variable rate springs |
| CN109765120A (en) * | 2019-03-12 | 2019-05-17 | 西安建筑科技大学 | A kind of heating and heat-insulating device of silk material thermodynamic test |
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Application publication date: 20191129 |
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