CN108427825B - A kind of wind-induced internal pressure test method towards the flexible building that punches - Google Patents
A kind of wind-induced internal pressure test method towards the flexible building that punches Download PDFInfo
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Abstract
The invention belongs to engineering structure wind resistance fields, more particularly, to a kind of wind-induced internal pressure test method towards the flexible building that punches.The present invention provides a kind of wind-induced internal pressure test method towards the flexible building that punches, by carrying out internal capacity amendment and reasonable choosing and regulating mechanism to buildings model, solves the flexible buildings model scale effect bring experimental test error problem that punches, reduce the measurement error of internal pressure resonant frequency caused by model scale, reduce the test distortion of internal pressure response, improve the reliability of model test result, the pulsation response that internal wind load after flexible building punches can accurately be measured, provides value foundation for engineering wind force proofing design.
Description
Technical field
The invention belongs to engineering structure wind resistance fields, survey more particularly, to a kind of wind-induced internal pressure towards the flexible building that punches
Method for testing.
Background technique
When building due to use function need or wind-induced damage and when generating local excavation, it is internal will generate it is significant
Internal pressure pulsation, in some instances it may even be possible to be more than corresponding external pressure value.It can after it is overlapped mutually with the wind load for acting on building external
Total net wind load that building structure can be greatly improved, to increase structural damage risk.A large amount of disaster caused by a windstorm investigation display, it is interior
This synergistic effect of external pressure is one of the main reason for lower building of high wind effect is destroyed.Therefore, it for building with opening, accurately comments
Estimating the response of its wind-induced internal pressure has safely particularly important engineering significance to guarantee structures under wind.
It assesses inside building with opening there are many kinds of the means of wind load, including theoretical calculation and test simulation etc..Due to existing
There is some unknown parameters undetermined in some internal pressure theoretical calculation equations, so theoretical method is caused to be difficult to be generalized to reality
In.Currently, most reliable and effective mode is to obtain the value of wind load inside building with opening using model wind tunnel test.
However, theoretical research shows that internal pressure response has the nonlinear characteristic of Helmholtz resonance.If after directlying adopt geometry reduced scale
Model carry out wind tunnel test and will will lead to the internal pressure resonant frequency that measures of test and pulsation response there are obvious errors.Therefore,
Amendment appropriate should be carried out to the buildings model after geometry reduced scale in test, to guarantee that internal pressure is rung between architecture archetype and model
Answer the similitude of characteristic.According to similarity principle, at present usually with prototype wind speed and the test wind ratio square for proportionality coefficient
To adjust model internal capacity to realize the amendment of scale effect.It is to be noted that this classical modification method is only fitted
It is the premise of rigid structure for architecture archetype and model.Because for flexible building with opening (for example, membrane structure building, work
Industry workshop etc.), under its inside outer wind pressure collective effect, malformation will lead to its internal capacity and can also generate to be changed accordingly
Become, and classical volume adjustment method can not consider to influence brought by this change, therefore, it is impossible to be applied to the class formation
In internal pressure test.
Model is needed according to wind speed ratio when previous classical scale effect revised theory only simple provides internal pressure test
Square conclusion being adjusted, but in actual tests operating process still have problems, cause often to expect
Less than test result.For example, the connectivity problem of regulating device and test model, when using lesser intercommunicating pore between the two,
The characteristics of internal pressure measured will appear crevasse, the characteristics of deviating from original building internal pressure single resonance response.In addition, adjusting dress
The shape set, such as height, also have a significant impact the test effect of internal pressure, when using excessively high adjusting container, equally will
The phenomenon that generating internal pressure response crevasse, causes to build interior Pressure testing result and deviation occurs.In order to the flexible building that punches
Wind force proofing design reliable internal wind load is provided, need to propose a kind of new internal pressure test method.
Summary of the invention
The present invention is directed to establish it is a kind of punch for flexible building after generated internal wind load testing scheme, for this
The wind force proofing design of class building structure provides accurately internal wind load.
For this purpose, above-mentioned purpose of the invention is realized by using following technical scheme:
A kind of wind-induced internal pressure test method towards the flexible building that punches, the wind-induced internal pressure towards the flexible building that punches
Test method successively the following steps are included:
1) the internal pressure resonant frequency for the flexible buildings model that punches is determined
1.1) the equivalent inner volume of architecture archetype is calculated
The finite element model of architecture archetype is established by architectural drawing and structural information, and unit pressure is applied to the model
Power show that load applies the knots modification of front and back Building dimension△V, and by the bulk modulus of following formula (1) calculating architecture archetype:
In formula: KbFor the bulk modulus of architecture archetype, V0To deform the preceding former volume built；According to KbIt can be concluded that flexible
The equivalent volume V of buildinge, it is as follows:
Ve=V0(1+Kb/γPa) (2)
In formula: γ is the specific heat ratio of air, can use 1.4, PaProduct for atmospheric pressure, the two represents the volume of air
Modulus；
1.2) the internal pressure resonant frequency of buildings model is calculated
According to the geometry scaling factor λ of architecture archetype and buildings modellWith wind speed ratio λuTo determine architecture archetype and buildings model
Between frequency ratio λf, relationship is as follows:
λf=λu/λl (3)
According to the transitive relation between interior external pressure, the internal pressure resonant frequency f of architecture archetype can be calculated according to following formulaHf
Are as follows:
In formula: A0To build the area that punches, ρaFor atmospheric density, leFor hole effective depth:Wherein:
l0For the actual depth to punch, CIFor hole air column inertia coeffeicent, can approximation be taken as 0.8；
According to fHs=fHf×λf, obtain the theoretical resonant frequency f of buildings model internal pressure response after reduced scaleHs；The frequency will be made
For the target of subsequent volume adjustment；
2) reasonability of regulating device is examined
Before the test for carrying out internal pressure, need to choose reasonable regulating device accurately repairing with implementation model scale effect
Just, it is unlikely to generate additional internal pressure covibration the multiple adjusting of subsequent volume for convenience to influence test result,
Regulating device preferably has the continuously adjustable function of volume；
2.1) connection pore size is chosen
Usual volume adjusting means are mounted on the bottom of model, and the two has intercommunicating pore on the contact surface, choose as far as possible
Big intercommunicating pore, will not be generated at intercommunicating pore when ensuring that regulating device is exchanged with model internal gas flow subresonance phenomenon into
And interference test is as a result, intercommunicating pore chooses whether rationally judge by following formula:
In formula:A1And A2Respectively
Indicate that model punches the area of area and intercommunicating pore, V1The internal capacity of representative model, V2Indicate the additional appearance that regulating device provides
Product, can use (λu 2-1)V1Come approximate estimation, le1And le2The effective depth that model punches with intercommunicating pore is then respectively indicated, can be joined
According to l in step 1)eCalculation method determine；When frequency f is calculated1And f2Meet the following conditions, it may be considered that connecting at this time
Hole size can satisfy test requirements document: (a) f1The model internal pressure theory resonant frequency f obtained close to step 1)Hs；(b)f1With f2
It differs farther out, and f2The corresponding internal pressure response energy of the high frequency region at place is lower, that is, is in the tail portion of internal pressure response power spectrum；
2.2) regulating device height is chosen
In order to avoid in regulating device air generate significant stationary wave vibration phenomenon and with internal pressure resonance intercouple,
The height that regulating device is reduced as far as under the premise of meeting volume requirement is needed to separate internal pressure resonant frequency and standing wave
Resonant frequency；
Firstly, (7) calculate air in regulating device there may be the frequency f of standing wave resonance according to the following formulas:
In formula: αsFor the velocity of sound, h is the height of selected regulating device；As calculated fsThe model obtained with step 1)
Internal pressure resonant frequency fHsDifference is farther out and corresponding internal pressure response energy is lower, it can thinks selected regulating device height
It can satisfy test accuracy requirement；
3) it adjusts internal capacity and tests internal pressure response
3.1) response of hole external pressure is obtained
Pressure tap is arranged at the quasi- position that punches to model before punching, and tests the distribution character of external pressure at the position that punches,
The external pressure time-histories obtained to each measuring point is average according to Area-weighted, and the external pressure with this role of delegate at hole responds；
3.2) using the accuracy of the theoretical internal pressure response check test result of architecture archetype, volume adjustment direction is specified
Just successive step is carried out using internal capacity of the regulating device to model, applies Fourier after measuring internal pressure response time-histories
Transformation obtains the power spectrum and resonant frequency f of model test internal pressure responseHt；In order to estimate the theoretical value of architecture archetype internal pressure response
With check test effect, it is necessary first to solve the undetermined parameter in internal pressure theory governing equation；Build the theoretical control of internal pressure
Equation meets following relationship:
In formula: CpiAnd CpeRespectively inside and outside pressure coefficient normalizes to obtain by the reference point wind pressure q that test is chosen；Its
Middle CpeUsing the external pressure result after back Area-weighted；Loss coefficient CLFor the unknown undetermined parameter in equation, can combine
Inside and outside pressure is tested as a result, identifying to obtain by following formula:
In formula: fHtTo test internal pressure resonant frequency,For the root mean square of internal pressure coefficient first derivative, using formula (9)
Calculate CLWhen, punch area A0With model punch area substitute into, dischargeable capacity VeIt is replaced with the internal capacity of model, with reference to wind pressure q
It is substituted into corresponding test result with inside and outside pressure coefficient；H(fHt) be interior external pressure amplitude comparison, formula (10) can be passed through
It is calculated:
In formula: SCpi(fHt) indicate internal pressure power spectrum in fHtValue at frequency, SCpe(fHt) indicate external pressure power spectrum in fHtFrequently
Value at rate；；
The C that will be recognizedLThe dimensionless C measured with testpeSubstitute into equation (8) and will punch area, internal capacity, reference
The analog value of wind pressure architecture archetype substitutes into, and then can be obtained in architecture archetype using runge kutta method solution formula (8)
Press the theoretical value of response；The same theoretical internal pressure power spectrum that architecture archetype can be obtained using Fourier transformation；By what is obtained
Internal pressure power spectrum is normalized, and normalizes the abscissa fZ/V of spectrumzIt indicates, wherein f is in former internal pressure power spectrum
Abscissa frequency, Z is normalization height (optional refer to point height), VzFor arrives stream wind speed corresponding at Z height, normalization spectrum
Ordinate SCpi(f)f/It indicates, wherein SCpiIt (f) is the ordinate value of former internal pressure power spectrum, σCpiIt is square for internal pressure
Root；The difference of model test internal pressure power spectrum and Prototype Theory internal pressure power spectrum after comparing normalization, it can under clearly
One step volume adjustment direction；
Comparative test internal pressure resonant frequency fHtWith target resonance frequencies fHsSize, if fHt>fHs, then adjusting is continued growing
Volume retests；If fHt<fHs, then continue to test after reducing volume adjusted；
3.3) repeatedly volume adjusted is responded with obtaining the accurate internal pressure under target resonance frequencies:
Constantly repeat previous process 3.2), until test internal pressure obtained responds resonant frequency fHtIt is analyzed close to step 1)
Obtained target resonance frequencies fHs, and test in internal pressure power spectrum and occur without apparent 2nd formant；On this basis,
Compare normalization after model test internal pressure power spectrum and architecture archetype theoretical internal pressure power spectrum: if the two meet compared with
It is good, it is believed that obtain inner pressure test result at this time and be able to reflect prototype punching the internal pressure response characteristic of flexible building；If interior
Press in power spectrum there are apparent additional resonant phenomenon, then need return step 2), selected regulating device is examined again
Reasonability carries out the test of step 3) again after adjustment.
The present invention provides a kind of wind-induced internal pressure test method towards the flexible building that punches, described towards the flexible building that punches
Wind-induced internal pressure test method have the advantages that
(1) it solves the flexible buildings model scale effect bring experimental test error problem that punches, can accurately measure soft
Property building punch after internal wind load pulsation response, provide value foundation for engineering wind force proofing design.
(2) it avoids in test using the test of internal pressure brought by unreasonable connection pore size and regulating device height
Error.
(3) reliability for examining model test result is combined with the theoretical appraisal method of internal pressure.
Detailed description of the invention
Fig. 1 is test regulating device schematic diagram；
Fig. 2 is the relational graph of stationary wave vibration frequency and regulating device height；
Fig. 3 is the flow field figure of wind tunnel test simulation；
Fig. 4 is the fluctuating wind speed spectrogram of wind tunnel test simulation；
Fig. 5 is Vt1Internal pressure power spectrum figure compared with Prototype Theory internal pressure power spectrum is tested under model volume；
Fig. 6 is Vt2Internal pressure power spectrum figure compared with Prototype Theory internal pressure power spectrum is tested under model volume.
Specific embodiment
It elaborates below in conjunction with attached drawing to the embodiment of the present invention.The present embodiment is using technical solution of the present invention as base
It is unfolded under plinth, but protection scope of the present invention is not limited to following embodiments.
The building of the present embodiment is a single-storey factory building in coastal area, and there are 25m × 50m in a side wall for workshop
It is leading punch, the length of workshop is respectively as follows: 137m × 91m × 40m, build location landforms be load code
(GB50009-2012) the B class landforms in.In wind tunnel test, the geometry scaling factor λ of model and prototypel=1:250, wind speed ratio are
λl=1:2.
According to the method for the present invention, the specific test method is as follows for the internal pressure of the building:
Step 1): first according to building structure information, finite element model is established using general finite element analysis software ANSYS
And unit pressure is applied to the model to obtain the volume knots modification that deformation front and back is built△V.It is calculated and is built by formula (1) and (2)
The dischargeable capacity V builte=1.4V0(V0=137m × 91m × 40m), further according to formula (3) and (4) respectively obtain buildings model and
Frequency ratio λ between prototypefThe theoretical internal pressure resonant frequency f of=125Hz and architecture archetypeHf=0.43Hz.And then it can be concluded that
The internal pressure resonant frequency theoretical value of model is f after building reduced scaleHs=53.8Hz.
Step 2): examine selected volume adjusting means whether reasonable.Fig. 1 is test regulating device schematic diagram.It examines first
Examine the size of intercommunicating pore.In the present embodiment choose both sizes of 5cm × 5cm and 36cm × 54cm intercommunicating pore, respectively according to
Formula (5) and (6) calculate f1And f2, the results are shown in Table 1.As seen from Table 1, it is obtained by small intercommunicating pore (5cm × 5cm) interior
Press first order resonance frequency f1Only 29.8Hz is much smaller than target resonance frequencies fHs=53.8Hz, and big intercommunicating pore (36cm ×
F under 54cm)1Then it is closer to target value.In addition, the f that small intercommunicating pore is calculated1With f2Between gap also can not show a candle to
Big intercommunicating pore.For big intercommunicating pore, f2Frequency is sufficiently high, and the internal pressure response energy under the frequency can almost be ignored.According to sentencing
Broken strip part is it is found that can satisfy test requirements document using the intercommunicating pore of 36cm × 54cm size, and the small intercommunicating pore of 5cm × 5cm is then
Easily cause the test error of internal pressure.
F under the different connection pore sizes of table 11And f2
| It is connected to pore size (cm) | f1(Hz) | f2(Hz) | Whether meet the requirements |
| 5×5 | 29.8 | 122.6 | It is no |
| 36×54 | 48.5 | 238.2 | It is |
Carry out the height of choosing and regulating mechanism again, this regulating device section is 37cm × 55cm, according to the volume that may be used
Adjustable range, the height (i.e. the adjustable maximum height of device) of choosing and regulating mechanism are 60cm (see Fig. 1), device height can
Adjustable range is 0~60cm.According to formula (7) it is found that the minimum frequency of air column generation stationary wave vibration is in regulating device
141.6Hz, with target resonance frequencies fHsDifference farther out, not will form and interfere with each other, and the corresponding internal pressure energy of the high-frequency resonance
It is smaller.Stationary wave vibration frequency is as shown in Figure 2 with the changing rule of the adjusting height of regulating device.If working as the adjusting of regulating device
Height is less than 60cm and also further decreases then the stationary wave vibration frequency is further increased to the interference of internal pressure resonance response.Always
From the point of view of body, the height of regulating device selected by the present embodiment is able to satisfy internal pressure test request.
Step 3): wind tunnel test finally is unfolded to buildings model and is responded with obtaining accurate internal pressure.Test the mould of Wind Field
Quasi- result and Standard heading are shown in that Fig. 3, upstream oscillating flow wind speed spectrum are shown in Fig. 4 compared with theory Kaimal is composed.As seen from Figure 3, it tests
Each section of wind field and the recommended value error of specification meet the requirement of test accuracy within 10%.And Fig. 4 then shows institute's mould
Quasi- fluctuation wind speed spectrum meets theoretical Kaimal spectrum form.That intends punching at position before first punching to model in test outer is pressed into
Row test obtains the C after measuring point Area-weightedpe, after then being punched again internal pressure test.According to step 3), when device tune
Volume is saved to Vt1=0.058m3When, undetermined parameter C can be calculated by formula (9)L, then by itself and external pressure CpeSubstitute into equation
(8) the internal pressure response theory value of architecture archetype is obtained in.It is theoretical by the available test internal pressure of Fourier transformation and architecture archetype
The power spectrum of internal pressure.Fig. 5 compares the V after normalizationt1Test internal pressure power spectrum and architecture archetype theory internal pressure function under volume
Rate spectrum, it is found that the test result (V after normalizingt1Test internal pressure power spectrum under volume) it (is built with goal theory spectrum
Build the theoretical internal pressure power spectrum of prototype) between there are notable difference, the internal pressure resonant frequency f that testsHtGreater than target resonant
Frequency fHs, therefore, it is necessary to further increase internal capacity.When volume is adjusted to Vt2=0.113m3When, what model test obtained
Preferable (see Fig. 6) that the theoretical internal pressure power spectrum of internal pressure power spectrum and architecture archetype meets, the internal pressure resonance tested at this time
Frequency is 53.2Hz close to target resonance frequencies fHs, it is therefore contemplated that Vt2The internal pressure response measured under volume, which is able to reflect, builds
Build the true internal pressure characteristic of prototype.By above embodiments it has also been discovered that, if not carrying out internal capacity to buildings model
Amendment, it is bigger than normal to will lead to the internal pressure resonant frequency measured, so that internal pressure response test be caused to be distorted.
Above-mentioned specific embodiment is used to illustrate the present invention, is merely a preferred embodiment of the present invention, rather than to this
Invention is limited, and within the spirit of the invention and the scope of protection of the claims, to any modification of the invention made, is equal
Replacement, improvement etc., both fall within protection scope of the present invention.
Claims (1)
1. a kind of wind-induced internal pressure test method towards the flexible building that punches, which is characterized in that described towards the flexible building that punches
Wind-induced internal pressure test method successively the following steps are included:
1) the internal pressure resonant frequency for the flexible buildings model that punches is determined
1.1) the equivalent inner volume of architecture archetype is calculated
The finite element model of architecture archetype is established by architectural drawing and structural information, and unit pressure is applied to the model, is obtained
Load applies the knots modification of front and back Building dimension out△V, and by the bulk modulus of following formula (1) calculating architecture archetype:
In formula: KbFor the bulk modulus of architecture archetype, V0To deform the preceding former volume built；According to KbIt can be concluded that flexible building
Equivalent volume Ve, it is as follows:
Ve=V0(1+Kb/γPa) (2)
In formula: γ is the specific heat ratio of air, can use 1.4, PaProduct for atmospheric pressure, the two represents the bulk modulus of air；
1.2) the internal pressure resonant frequency of buildings model is calculated
According to the geometry scaling factor λ of architecture archetype and buildings modellWith wind speed ratio λuTo determine between architecture archetype and buildings model
Frequency ratio λf, relationship is as follows:
λf=λu/λl (3)
According to the transitive relation between interior external pressure, the internal pressure resonant frequency f of architecture archetype can be calculated according to following formulaHfAre as follows:
In formula: A0To build the area that punches, ρaFor atmospheric density, leFor hole effective depth:Wherein: l0To open
The actual depth in hole, CIFor hole air column inertia coeffeicent, can approximation be taken as 0.8；
According to fHs=fHf×λf, obtain the theoretical resonant frequency f of buildings model internal pressure response after reduced scaleHs；After the frequency will be used as
The target of continuous volume adjustment；
2) reasonability of regulating device is examined
Before the test for carrying out internal pressure, need to choose reasonable regulating device with the accurate amendment of implementation model scale effect,
And be unlikely to generate additional internal pressure covibration to influence test result, the multiple adjusting of subsequent volume for convenience, it adjusts
Regulating device preferably has the continuously adjustable function of volume；
2.1) connection pore size is chosen
Usual volume adjusting means are mounted on the bottom of model, and the two has intercommunicating pore on the contact surface, intercommunicating pore are chosen, with true
Protect regulating device will not be generated at intercommunicating pore when being exchanged with model internal gas flow subresonance phenomenon in turn interference test as a result,
Intercommunicating pore chooses whether rationally judge by following formula:
In formula:
A1And A2It respectively indicates model to punch the area of area and intercommunicating pore, V1The internal capacity of representative model, V2Indicate that regulating device mentions
The additional volume of confession can use (λu 2-1)V1Come approximate estimation, le1And le2Then respectively indicate model punch it is effective with intercommunicating pore
Depth can refer to l in step 1)eCalculation method determine；When frequency f is calculated1And f2Meet the following conditions, then it can be with
Think that intercommunicating pore size can satisfy test requirements document at this time: (a) f1The model internal pressure theory resonant frequency obtained close to step 1)
fHs；(b)f1With f2It differs farther out, and f2The corresponding internal pressure response energy of the high frequency region at place is in the tail of internal pressure response power spectrum
Portion；
2.2) regulating device height is chosen
In order to avoid in regulating device air generate significant stationary wave vibration phenomenon and with internal pressure resonance intercouple, need
The height of regulating device is reduced under the premise of meeting volume requirement to separate internal pressure resonant frequency and standing wave resonance frequency；
Firstly, (7) calculate air in regulating device there may be the frequency f of standing wave resonance according to the following formulas:
In formula: αsFor the velocity of sound, h is the height of selected regulating device；As calculated fsThe model internal pressure obtained with step 1)
Resonant frequency fHsDifference is farther out and corresponding internal pressure responds the tail portion that energy is in internal pressure response power spectrum, it can thinks selected
The regulating device height selected can satisfy test accuracy requirement；
3) it adjusts internal capacity and tests internal pressure response
3.1) response of hole external pressure is obtained
Pressure tap is arranged at the quasi- position that punches to model before punching, and tests the distribution character of external pressure at the position that punches, to each
The external pressure time-histories that measuring point obtains is average according to Area-weighted, and the external pressure with this role of delegate at hole responds；
3.2) using the accuracy of the theoretical internal pressure response check test result of architecture archetype, volume adjustment direction is specified
Just successive step is carried out using internal capacity of the regulating device to model, applies Fourier transformation after measuring internal pressure response time-histories
Obtain the power spectrum and resonant frequency f of model test internal pressure responseHt；In order to estimate the theoretical value of architecture archetype internal pressure response to examine
Test test effect, it is necessary first to solve the undetermined parameter in internal pressure theory governing equation；Build the theoretical governing equation of internal pressure
Meet following relationship:
In formula: CpiAnd CpeRespectively inside and outside pressure coefficient normalizes to obtain by the reference point wind pressure q that test is chosen；Wherein Cpe
Using the external pressure result after back Area-weighted；Loss coefficient CLIt, can be in conjunction with test for the unknown undetermined parameter in equation
Inside and outside pressure by following formula as a result, identify to obtain:
In formula: fHtTo test internal pressure resonant frequency,For the root mean square of internal pressure coefficient first derivative, C is calculated using formula (9)L
When, punch area A0With model punch area substitute into, dischargeable capacity VeReplaced with the internal capacity of model, with reference to wind pressure q and it is interior,
External pressure coefficient is substituted into corresponding test result；H(fHt) be interior external pressure amplitude comparison, can be calculated by formula (10)
It arrives:
In formula: SCpi(fHt) indicate internal pressure power spectrum in fHtValue at frequency, SCpe(fHt) indicate external pressure power spectrum in fHtAt frequency
Value；
The C that will be recognizedLThe dimensionless C measured with testpeSubstitute into equation (8) and will punch area, internal capacity, with reference to wind pressure
It is substituted into the analog value of architecture archetype, architecture archetype internal pressure then can be obtained using runge kutta method solution formula (8) and rung
The theoretical value answered；The same theoretical internal pressure power spectrum that architecture archetype can be obtained using Fourier transformation；The internal pressure that will be obtained
Power spectrum is normalized, and normalizes the abscissa fZ/V of spectrumzIt indicates, wherein f is the cross in former internal pressure power spectrum
Coordinate frequency, Z are normalization height, VzFor arrives stream wind speed corresponding at Z height, the ordinate for normalizing spectrum is usedIt indicates, wherein SCpiIt (f) is the ordinate value of former internal pressure power spectrum, σCpiFor internal pressure root-mean-square value；Compare and returns
The difference of the theoretical internal pressure power spectrum of model test internal pressure power spectrum and architecture archetype after one change, it can clear to hold in next step
Product adjusts direction；
Comparative test internal pressure resonant frequency fHtWith target resonance frequencies fHsSize, if fHt>fHs, then volume adjusted is continued growing,
It retests；If fHt<fHs, then continue to test after reducing volume adjusted；
3.3) repeatedly volume adjusted is responded with obtaining the accurate internal pressure under target resonance frequencies:
Constantly repeat previous process 3.2), until test internal pressure obtained responds resonant frequency fHtIt is obtained close to step 1) analysis
Target resonance frequencies fHs, and test in internal pressure power spectrum and occur without apparent 2nd formant；On this basis, compare
The theoretical internal pressure power spectrum of test internal pressure power spectrum and architecture archetype after normalization: if the two meets preferable, can recognize
To obtain inner pressure test result at this time and being able to reflect prototype punching the internal pressure response characteristic of flexible building；If internal pressure power spectrum
In there are apparent additional resonant phenomenon, then need return step 2), examine the reasonability of selected regulating device again, adjust
The test of step 3) is carried out after whole again.
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| CN109342014B (en) * | 2018-11-02 | 2020-06-16 | 浙江大学 | L-shaped gallery type double-layer curtain wall wind tunnel test model device with adjustable volume |
| CN110489854B (en) * | 2019-08-14 | 2023-08-01 | 中船第九设计研究院工程有限公司 | Internal pressure estimation simplification method for single-wall open-hole building |
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