CN204479265U - The gain device for measuring force of bridge cable model wind resistance coefficient - Google Patents
The gain device for measuring force of bridge cable model wind resistance coefficient Download PDFInfo
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- CN204479265U CN204479265U CN201520058727.5U CN201520058727U CN204479265U CN 204479265 U CN204479265 U CN 204479265U CN 201520058727 U CN201520058727 U CN 201520058727U CN 204479265 U CN204479265 U CN 204479265U
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Abstract
The utility model provides the gain device for measuring force of bridge cable model wind resistance coefficient, is specifically related to the method utilizing lever principle, many arrangement modes measure grade diameter bridge cable model windage resistance.This gain device for measuring force comprises drag-line model, lever and force balance; Wind-tunnel sole arrangement has the gentle lever in sky; Drag-line model one end divergence expression is connected with wind-tunnel end face, and the other end is connected with the longer one end of lever arm of force, and drag-line model forms triangular structure between wind-tunnel end face and wind-tunnel bottom surface, and drag-line model is no less than 2; The shorter one end of lever arm of force connects force balance.Effect of the present utility model and benefit are a kind of methods of practicable measurement minor diameter drag-line wind resistance coefficient, required device is simple and reliable, making easily, conventional range force balance can be utilized, not needing to buy separately small-range balance for measuring minor diameter drag-line windage resistance.
Description
Technical field
The utility model relates to a kind of gain device for measuring force of bridge cable model wind resistance coefficient, is specifically related to the method utilizing lever principle, many arrangement modes measure grade diameter bridge cable model windage resistance.
Background technology
Wind tunnel test is one of main method of research structure wind resistance.For large span cableway platform, the ratio that the upper resistance wind load of drag-line (main push-towing rope) accounts for overall wind load is very large.For ensureing full bridge aeroelastic model wind tunnel test accurately and reliably, be necessary accurate calibration model drag-line wind resistance coefficient.
Because bridge model overall ratio is less, such as 1:100 is even less.Drag-line model diameter is generally between 0.5-2mm.Such as diameter is 1mm, length be the drag-line of 1m under the effect of 10m/s wind speed, resistance approximately only has 0.06N.And conventional force balance range is general all more than tens newton in wind-tunnel.Therefore, measuring accuracy cannot be ensured by conventional method.Although also there is unconventional small-range balance, need the very considerable funds of special input to purchase, and purposes scope is narrower.
Utility model content
The technical problems to be solved in the utility model is, for the needs of wind tunnel test, provides a kind of device measuring grade diameter bridge cable model wind resistance coefficient.
For achieving the above object, the technical solution of the utility model is: the gain device for measuring force of bridge cable model wind resistance coefficient comprises drag-line model, lever and force balance; The gentle lever in sky is furnished with under wind-tunnel bottom surface; Drag-line model one end divergence expression is connected with wind-tunnel end face, and the other end is connected with the longer one end of lever arm of force, and drag-line model forms triangular structure between wind-tunnel end face and wind-tunnel bottom surface, and drag-line model is no less than 2; The shorter one end of lever arm of force connects force balance.Drag-line windage resistance to balance, amplifies windage resistance by lever principle by lever transmission, improves aerodynamic balance measuring precision.In order to increase resistance further, improving test accuracy, diameter identical drag-line model symmetric offset spread can be increased and be arranged between wind-tunnel end face and wind-tunnel bottom surface.
The diameter of described drag-line model is grade.
Described lever plays the effect connecting drag-line model and balance, and adjustable balance pivot position changes gain scale.Balance pivot place should arrange rolling bearing, reduces friction on the impact of measuring accuracy.Lever should select light rigid materials, and is placed in test chamber outside, ensures it not by wind action.
The spacing of described drag-line model is greater than the diameter of 20 times of drag-line models.
As a kind of method measuring grade diameter bridge cable model windage resistance, relative to general drag-line windage resistance measuring method, advantage of the present utility model has:
1, be a kind of method of practicable measurement minor diameter drag-line wind resistance coefficient, required device is simple and reliable, makes easily.
2, conventional range force balance can being utilized, not needing to buy separately small-range balance for measuring minor diameter drag-line wind resistance coefficient.
Accompanying drawing explanation
Fig. 1 is the structural representation of the gain device for measuring force of bridge cable model wind resistance coefficient.
Fig. 2 is lever horizontal pivot arm place organigram.
In figure: 1 grade diameter drag-line model; 2 levers; 3 balance pivots; 4 force balances; 5 wind-tunnel end faces; 6 wind-tunnel bottom surfaces.
Embodiment
Below in conjunction with accompanying drawing and technical scheme, further illustrate embodiment of the present utility model.
As shown in Figure 1, measure grade diameter bridge cable model wind resistance coefficient and one end of drag-line model 1 is connected to wind-tunnel end face, the other end is connected to lever transverse arm 2 end, and 1/2 of windage resistance respectively born by wind-tunnel top board and lever 2, and lever 2 is connected with force balance 4, under wind action, lever 2 has the trend of rotating around balance pivot 3, and by lever principle, windage resistance can amplify several times, meet the range needs of force balance 4, improve measuring accuracy.For amplifying Cable power further, can fan-shaped layout many drag-line models 1, at utmost utilize transverse arm length, increase sky flush end stressed.According to the gain factor of wind speed, drag-line total length, drag-line diameter, balance display reading and lever, the resistance coefficient of drag-line can be determined easily.
Claims (8)
1. a gain device for measuring force for bridge cable model wind resistance coefficient, is characterized in that, this gain device for measuring force comprises drag-line model, lever and force balance; Wind-tunnel sole arrangement has the gentle lever in sky; Drag-line model one end divergence expression is connected with wind-tunnel end face, and the other end is connected with the longer one end of lever arm of force, and drag-line model forms triangular structure between wind-tunnel end face and wind-tunnel bottom surface, and drag-line model is no less than 2; The shorter one end of lever arm of force connects force balance.
2. gain device for measuring force according to claim 1, is characterized in that, described drag-line model is that the identical symmetric offset spread of diameter is arranged between wind-tunnel end face and wind-tunnel bottom surface.
3. gain device for measuring force according to claim 1 and 2, is characterized in that, the diameter of described drag-line model is grade.
4. gain device for measuring force according to claim 1 and 2, is characterized in that, change gain scale by adjustment balance pivot position, balance pivot place arranges rolling bearing.
5. gain device for measuring force according to claim 3, is characterized in that, change gain scale by adjustment balance pivot position, balance pivot place arranges rolling bearing.
6. the gain device for measuring force according to claim 1,2 or 5, is characterized in that, light rigid materials selected by described lever.
7. gain device for measuring force according to claim 3, is characterized in that, light rigid materials selected by described lever.
8. gain device for measuring force according to claim 4, is characterized in that, light rigid materials selected by described lever.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520058727.5U CN204479265U (en) | 2015-01-26 | 2015-01-26 | The gain device for measuring force of bridge cable model wind resistance coefficient |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520058727.5U CN204479265U (en) | 2015-01-26 | 2015-01-26 | The gain device for measuring force of bridge cable model wind resistance coefficient |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204479265U true CN204479265U (en) | 2015-07-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520058727.5U Expired - Fee Related CN204479265U (en) | 2015-01-26 | 2015-01-26 | The gain device for measuring force of bridge cable model wind resistance coefficient |
Country Status (1)
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| CN (1) | CN204479265U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111855129A (en) * | 2020-08-11 | 2020-10-30 | 大连理工大学 | Wind-induced vibration test device for overlong stay cable aeroelastic model in natural wind field |
| CN112051028A (en) * | 2020-09-16 | 2020-12-08 | 大连理工大学 | Outdoor super-large-proportion full-bridge aeroelastic model wind-resistant protection device |
| CN112161775A (en) * | 2020-08-17 | 2021-01-01 | 东华大学 | Method and device for testing wind resistance performance of grid fabric |
-
2015
- 2015-01-26 CN CN201520058727.5U patent/CN204479265U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111855129A (en) * | 2020-08-11 | 2020-10-30 | 大连理工大学 | Wind-induced vibration test device for overlong stay cable aeroelastic model in natural wind field |
| CN112161775A (en) * | 2020-08-17 | 2021-01-01 | 东华大学 | Method and device for testing wind resistance performance of grid fabric |
| CN112051028A (en) * | 2020-09-16 | 2020-12-08 | 大连理工大学 | Outdoor super-large-proportion full-bridge aeroelastic model wind-resistant protection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150715 Termination date: 20160126 |
|
| EXPY | Termination of patent right or utility model |