CN202549150U - Hyperbolic thin-shell cooling tower physical test model - Google Patents
Hyperbolic thin-shell cooling tower physical test model Download PDFInfo
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- CN202549150U CN202549150U CN2012200379620U CN201220037962U CN202549150U CN 202549150 U CN202549150 U CN 202549150U CN 2012200379620 U CN2012200379620 U CN 2012200379620U CN 201220037962 U CN201220037962 U CN 201220037962U CN 202549150 U CN202549150 U CN 202549150U
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Abstract
The utility model relates to the technical field of physical test model, in particular to a hyperbolic thin-shell cooling tower physical test model. The hyperbolic thin-shell cooling tower physical test model comprises an annular base, posts with a shape of Chinese character ''ren'', a continuous shell tower drum, a rigid ring, and a tower top, and is characterized in that the rigid ring is arranged on the tower top; the continuous shell tower drum is a reticular structure with trussed beams intersecting vertically and horizontally; and the annular base is arranged on the bottom of the continuous shell tower drum, and is connected with a pedestal through the posts with the shape of Chinese character ''ren''. In comparison with the prior art, the hyperbolic thin-shell cooling tower physical test model provided by the utility model has the following advantages: the problem of discordance of two kinds of stiffness of the conventional vibration elastic model is obviated; and the test analysis precision of the cooling tower caused by strong wind or earthquake is improved greatly; and the physical test model has high practicability.
Description
[technical field]
The utility model relates to physical test modelling technique field, a kind of specifically hyperbolic shell cooling tower physical test model.
[background technology]
Large cooling column is as a kind of space thin-walled tall and slender structure, and design apoplexy and earthquake load are important controlling factors, and the security under wind and the seismic stimulation effect always receives the great attention of engineering circle.Along with the development of China's electric utility, constantly build many regional ultra-large types, high-density arrangement cooling tower crowd in recent years, cooling tower crowd tower disturbs and wind shakes, and effect is very outstanding, has higher requirement for cooling tower anti-vibration design.From the seventies in last century; Isyumov and Armitt are based on the wind tunnel test of early stage cooling tower elastic model; Point out that the dynamic stress of cooling tower under wind action has identical magnitude with static stress; And the 4 powers growth that resonance stress press wind speed is higher than the growth rate of quasistatic stress far away, shows that cooling tower wind vibration response effect do not allow to ignore.Cooling tower wind tunnel test method commonly used like synchronous pressure measurement in surface and substrate high frequency aerodynamic balance measuring, can't directly obtain cooling tower wind vibration response situation.Calculate cooling tower wind vibration response dynamic magnification factor by synchronous manometric test surface aerodynamic force time history and also have problems such as being difficult to describe relevant self-excitation aerodynamic force with motion morphology.
The hyperboloid cooling tower belongs to typical shell structure (the about 250mm of minimum wall thickness (MINI W.)), and the vibration shape is complicated, and wind action susceptibility is stronger.Difficulty in view of bullet modelling of cooling tower gas and processing; All there is deficiency in the actual both at home and abroad cooling tower gas bullet model that adopts at aspects such as physical parameter and the simulations of aerodynamic parameter ratio of similitude, to a certain degree limit the practical applications of cooling tower physical model results of wind tunnel.
[summary of the invention]
The purpose of the utility model is to solve the deficiency of prior art; Adopt the Space Flexible Structure equivalence vibration elastic model of equivalent space lattice method design; In the structural vibration test, more can simulate continuous shell structure kinematic behavior truly; The direct displacement and the acceleration responsive of measurement structure under load excitation immediately such as high wind and earthquake; Solve traditional continuum Model axial rigidity and bending rigidity scaling factor is simulated inharmonic problem, and on appropriate change aerodynamic configuration roughness basis, the blast under the continuous thimble body structure of the simulation high reynolds number that can be similar to streams characteristic.
For realizing above-mentioned purpose; Design a kind of hyperbolic shell cooling tower physical test model; Comprise cyclic group, herringbone column, continuous shell tower tube, stiffening ring, cat head, it is characterized in that described cat head is provided with stiffening ring, described continuous shell tower tube is a space square crossing trusses reticulate texture in length and breadth; Shell tower tube bottom is provided with cyclic group continuously, and cyclic group is connected with base through several herringbone columns.
Described continuous shell tower tube adopts finite element grid to divide, and hoop and meridian are to all adopting limited discrete integer unit.
The part of said continuous shell tower tube connects into reticulate texture by the steel bar square crossing of certain width.
Described hyperbolic shell cooling tower physical test model scale is 1: 600 to 1: 20 than scope.
Be provided with several masses in the described hyperbolic shell cooling tower physical test model, described mass adopts the bolt symmetry to be fixed on hyperbolic shell cooling tower physical test model inwall.
Shell tower tube outer surface is provided with outer skin continuously, and described covering adopts the elasticity lightweight or has the ad hoc structure structure and requires material to process.
The utility model compared with prior art has the following advantages:
One, two types of inharmonic problems of rigidity of traditional vibration elastic model have been avoided.
But the quadrature trusses element thickness of the utility model localized positions and width be free adjustment all, has realized multiparameter adjustment vibration elastic model axial rigidity and has bent, turns round two types of rigidity reduced scale relations of rigidity.
Two, greatly improved externally load excitation analysis of experiments precision of cooling tower.
The utility model can satisfy the reduced scale requirement of member simultaneously, simulates hyperbolic shell cooling tower kinematic behavior approx, reflects displacement and the acceleration responsive of hyperbolic shell cooling tower under load excitation immediately such as high wind and earthquake more realistically.
Three, practical.
[description of drawings]
Fig. 1 is the front view of the utility model;
Fig. 2 is the upward view of the utility model;
Fig. 3 is the cut-open view of the utility model;
Fig. 4 is the continuous shell tower of a utility model tube partial schematic diagram;
Fig. 5 is that the continuous shell tower of the utility model tube is provided with the mass partial schematic diagram;
Fig. 6 is the utility model mass stereographic map;
Fig. 7 is the utility model mass vertical view;
1. stiffening rings, 2. continuous shell tower tube 3. herringbone columns 4. cyclic groups 5. bases among the figure
[embodiment]
In conjunction with accompanying drawing the utility model is described further, the manufacturing technology of this device is very clearly concerning this professional people.
Referring to Fig. 1, Fig. 2; The utility model comprises cyclic group, herringbone column, continuous shell tower tube, stiffening ring, cat head; It is characterized in that described cat head is provided with stiffening ring; Described continuous shell tower tube is a space square crossing trusses reticulate texture in length and breadth, and shell tower tube bottom is provided with cyclic group continuously, and cyclic group is connected with base through several herringbone columns.The part of said continuous shell tower tube connects into reticulate texture by the steel bar square crossing of certain width.
Referring to Fig. 3-Fig. 7, be provided with several masses in the hyperbolic shell cooling tower physical test model, described mass adopts the bolt symmetry to be fixed on hyperbolic shell cooling tower physical test model inwall.
The utility model design procedure is following:
Step 1: the modeling that becomes more meticulous of the continuous shell tower of cooling tower barrel shell unit, to this example noon to shell unit number: M=132, hoop shell unit number: N=144;
Step 2: by the kinematic behavior equivalence principle, simplify cooling tower shell unit model, this routine m=13 is with=36;
Step 3: space beam element modeling, meridian is m to the beam element number, and hoop beam element number is n, and maximum adjustable joint unit size number is 2 (2m+1) n=1944, considers the hoop symmetry of cooling tower structure, and being reduced to meridian is D to thickness and width variable
Ver.i, W
Ver.i(i=1, m) hoop thickness and width variable are D
Cir.j, W
Cir.j(j=1, m+1), the variable number is reduced to 4m+2=54;
Step 4: consider that model makes things convenient for processing characteristics, meridian adopts elongated equal thickness member D to beam lattice unit
Ver.i, be reduced to unitary variant X
0,, calculate bending resistance of cylindrical shell differing heights unit sizes and axial reduced scale rigidity constant Matrix C by cooling tower cylindrical shell bendind rigidity and the requirement of axial rigidity reduced scale
Bending, I, C
Axial, i(i=1, m).Suppose that cooling tower model scantling and reduced scale rigidity satisfy the linear combination condition
Consider that in model assembly unit process a large amount of connected node in length and breadth (m+1) n adopts welding connecting mode, node place rigidity loss cumulative effect is bigger, has introduced rigidity commutation factor k in the formula (1).When modelling, be necessary to set up rigidity loss relation through preprocessing model actual measurement kinematic behavior value, in the modelling process, take corresponding stiffness correction way.The variable number further is reduced to 6-7 in the formula (1).The result is a foundation with cooling tower shell unit modeling kinematic behavior, and general desirable preceding 6～8 rank mode are simulated target, given X
1～X
6Initial value, iterative computation is also adjusted variable-value, generally can obtain simulate effect preferably.
Gas bullet Model Beam lattice unit material member can be zinc-plated stalloy, and standard sections thickness is the 0.1mm increment, and thickness is between 0.1～1.0mm, and Width adopts the line cutting mode, and accurate to dimension is 0.01mm.
Except that the similarity that satisfies elastic stiffness and geometric shape required, cooling tower gas bullet model also need carry out the strictness simulation to the quality system of structure, to guarantee the similarity of structural dynamic characteristic.According to the requirement of cooling tower quality system ratio of similitude, the deduction actual mass that steel skeleton and coat provided, can adopt (m+1) n group copper-lead piece is the quality that counterweight is replenished insufficient section, mass adopts the bolt symmetry to be fixed on the inwall of cooling tower model.
Requirement according to the geometric similarity ratio; But employing has elasticity, the lightweight film integral of tension performance is posted in the profile that the steel skeleton outside surface is simulated actual cooling tower structure; Coat itself provides rigidity and surface not to interspace hardly; Coat after the tensioning tangible local wind can not occur and shake and be out of shape under the wind speed effect, too much damping ratio also is not provided.
Claims (6)
1. hyperbolic shell cooling tower physical test model; Comprise cyclic group, herringbone column, continuous shell tower tube, stiffening ring, cat head; It is characterized in that described cat head is provided with stiffening ring; Described continuous shell tower tube is a space square crossing trusses reticulate texture in length and breadth, and shell tower tube bottom is provided with cyclic group continuously, and cyclic group is connected with base through several herringbone columns.
2. a kind of hyperbolic shell cooling tower physical test model as claimed in claim 1 is characterized in that described continuous shell tower tube adopts finite element grid to divide, and hoop and meridian are to all adopting limited discrete integer unit.
3. a kind of hyperbolic shell cooling tower physical test model as claimed in claim 1, the part that it is characterized in that said continuous shell tower tube connects into reticulate texture by the steel bar square crossing of certain width.
4. a kind of hyperbolic shell cooling tower physical test model as claimed in claim 1 is characterized in that described hyperbolic shell cooling tower physical test model scale is 1:600 to 1:20 than scope.
5. a kind of hyperbolic shell cooling tower physical test model as claimed in claim 1; It is characterized in that being provided with several masses in the described hyperbolic shell cooling tower physical test model, described mass adopts the bolt symmetry to be fixed on hyperbolic shell cooling tower physical test model inwall.
6. a kind of hyperbolic shell cooling tower physical test model as claimed in claim 1 is characterized in that described continuous shell tower tube outer surface is provided with outer skin, and described covering adopts the elasticity lightweight or has the ad hoc structure structure and requires material to process.
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| CN2012200379620U CN202549150U (en) | 2012-02-07 | 2012-02-07 | Hyperbolic thin-shell cooling tower physical test model |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102607292A (en) * | 2012-02-07 | 2012-07-25 | 赵林 | Method for making equivalent space discrete-grid vibration elasticity model |
| CN106898235A (en) * | 2017-03-08 | 2017-06-27 | 同济大学 | Shaping separate type covering mounting structure |
| CN111783325A (en) * | 2020-05-28 | 2020-10-16 | 东南大学 | Method for manufacturing cooling tower aeroelastic pressure measurement model by adopting Reynolds number effect simulation |
| CN112112771A (en) * | 2020-10-28 | 2020-12-22 | 福州大学 | Large-proportion floating type fan scaling tower meeting similar rigidity and mass and working method thereof |
| CN112380747A (en) * | 2020-11-13 | 2021-02-19 | 中国电力工程顾问集团西南电力设计院有限公司 | Design method of hyperbolic steel structure cooling tower |
-
2012
- 2012-02-07 CN CN2012200379620U patent/CN202549150U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102607292A (en) * | 2012-02-07 | 2012-07-25 | 赵林 | Method for making equivalent space discrete-grid vibration elasticity model |
| CN106898235A (en) * | 2017-03-08 | 2017-06-27 | 同济大学 | Shaping separate type covering mounting structure |
| CN106898235B (en) * | 2017-03-08 | 2020-04-28 | 同济大学 | Plastic separating skin mounting structure |
| CN111783325A (en) * | 2020-05-28 | 2020-10-16 | 东南大学 | Method for manufacturing cooling tower aeroelastic pressure measurement model by adopting Reynolds number effect simulation |
| CN112112771A (en) * | 2020-10-28 | 2020-12-22 | 福州大学 | Large-proportion floating type fan scaling tower meeting similar rigidity and mass and working method thereof |
| CN112112771B (en) * | 2020-10-28 | 2024-03-29 | 福州大学 | Large-proportion floating fan scaling tower meeting similar rigidity and mass and working method thereof |
| CN112380747A (en) * | 2020-11-13 | 2021-02-19 | 中国电力工程顾问集团西南电力设计院有限公司 | Design method of hyperbolic steel structure cooling tower |
| CN112380747B (en) * | 2020-11-13 | 2022-05-24 | 中国电力工程顾问集团西南电力设计院有限公司 | Design method of hyperbolic steel structure cooling tower |
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| 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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121121 Termination date: 20130207 |