CN105973566A - Measuring system of fluid-solid coupling parameter and measuring method thereof - Google Patents
Measuring system of fluid-solid coupling parameter and measuring method thereof Download PDFInfo
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- CN105973566A CN105973566A CN201610351473.5A CN201610351473A CN105973566A CN 105973566 A CN105973566 A CN 105973566A CN 201610351473 A CN201610351473 A CN 201610351473A CN 105973566 A CN105973566 A CN 105973566A
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Abstract
The invention discloses a measuring system of a fluid-solid coupling parameter. The measuring system comprises a main measuring device body, a control subsystem, and a data acquisition and processing subsystem. The main measuring device body consists of a support frame and a water pool; an electromagnetic exciter, an upper plate, a lower plate, and support legs are arranged successively from top to bottom between the support frame and the water pool; an accelerometer and a displacement sensor are arranged on the upper plate; and force sensors are arranged on the support legs below the lower plate. In addition, the invention also discloses a method for measuring a fluid-solid coupling parameter by using the measuring system. With the method, an added mass value and an added damping value can be measured and thus a fluid and solid coupling parameter can be obtained. According to the invention, the provided measuring system with a simple structure can be used conveniently. With the measuring system, both a fluid-solid coupling parameter of a flat panel and a fluid-solid coupling parameter of a pore plate can be measured; and precise data can be provided for a vibration-absorbing analysis or a vibration-absorbing design.
Description
Technical field
The present invention relates to technical field of nuclear power energy, be specifically related to spent fuel storage rack
Field, especially, relate between a kind of spent fuel storage rack and screen work and pond it
Between the measurement system of fluid structurecoupling parameter.
Background technology
Spent fuel storage rack is used to storage and has the most highly active spentnuclear fuel group
Part, owing to irradiated fuel assembly transports outward the complexity of fuel treatment factory, in limited pond
Arrange irradiated fuel assembly as much as possible in space, therefore, typically use intensity
Storage screen work.But, which increases the danger of irradiated fuel assembly storage.In order to
Ensure the safety of storage, it is ensured that irradiated fuel assembly is not up to critical shape when storage
State, remains to keep storage function, therefore, spent fuel storage rack under seismic (seismal
It is designed to antidetonation I kind equipment, design should meet and keep it to store under seismic (seismal
Function, not falling apart, do not tumble, there is not big deformation in screen work, it is ensured that during storage
Fuel assembly is not up to critical state.Therefore, when screen work designs, need to carry out
Structural analysis under earthquake operating mode.
When earthquake, the state of spent fuel storage rack needs to consider the work of fluid (water)
Firmly, generally, when screen work is carried out structural analysis under earthquake operating mode, generally
Use Transient Analysis, fluid force is reduced to additional mass and additional damping this
Two solid coupling parameters of stream, using the two parameter as input, are attached to the limited of screen work
Meta-analysis program, thus solve the maximum load of structure, structure is carried out stress evaluation.
So the seismic safety of spent fuel storage rack is had extremely by the two fluid structurecoupling parameter
Important effect.
Abroad fluid structurecoupling characteristic research between spent fuel storage rack with pond is compared complete
Face, it is proposed that three-dimensional spentnuclear fuel screen work dynamic Fluid structure interaction model.And by real
Test and CFD software simulates the correctness verifying many screen works fluid coupling model, but
It is that choosing of its parameter is also uncertain.And domestic correlational study is deficienter,
Mainly business software simulation, its Coupling effect of seepage rock deformation have employed hydrodynamic mass and examines
Considering, the dynamics parameter ratio such as the additional mass obtained and additional damping is more conservative,
And shortage experimental data.
Summary of the invention
In order to overcome the problems referred to above, present inventor has performed and study with keen determination, design one
Plant the measurement system of fluid structurecoupling parameter, utilize this measurement system, every by controlling
Parameter, carries out specific experiment, obtains data sequence, then carries out data sequence
Little square law nonlinear fitting obtains additional mass and additional damping, i.e. fluid structurecoupling ginseng
Number, thus complete the present invention.
It is an aspect of the invention to provide the measurement system of a kind of fluid structurecoupling parameter,
Described fluid structurecoupling parameter is between spent fuel storage rack or between screen work and pond
Fluid structurecoupling parameter, specific as follows:
(1) the measurement system of a kind of fluid structurecoupling parameter, wherein, described measurement system
Including measurement apparatus main body 1, described measurement apparatus main body 1 includes bracing frame 11 and pond
12, between bracing frame 11 and pond 12, it is disposed with electromagnetic exciter from top to bottom
13, upper plate 15, lower plate 16 and leg 17；
(2) according to the measurement system described in above-mentioned (1), wherein,
Described electromagnetic exciter 13, for water is produced exciting force, will encourage masterpiece then
For upper plate 15,
Described upper plate 15 is used for simulating actual spent fuel storage rack,
Described lower plate 16 is used for simulating actual neighbouring screen work or actual adjacent pool,
Described leg 17 is used for making lower plate 16 stand on pond 12；
(3) according to the measurement system described in above-mentioned (2), wherein,
Described upper plate 15 and lower plate 16 respectively rectangular slab, preferably rectangular steel plate, and/
Or
Described electromagnetic exciter 13 is fixed on the upper end of bracing frame 11, and/or
Described upper plate 15 is connected with electromagnetic exciter 13 by drive rod 14, and/or
Described leg 17 is more than 3, and described leg 17 is symmetrically distributed in lower plate 16
Lower section, it is preferable that described leg 17 is 4, and is distributed evenly in lower plate respectively
On four angles of 16；
(4) according to the measurement system described in above-mentioned (3), wherein,
Described electromagnetic exciter 13 uses sine wave to carry out exciting, the width of described sine wave
Value and frequency are controlled, and/or
Upper plate 15 can move up and down along drive rod 14, for control different at the beginning of
Beginning gap length, described primary clearance size is the primary clearance between upper plate and lower plate
Size；
(5) according to the measurement system described in above-mentioned (4), wherein,
Upper plate 15 is provided with accelerometer 18, is used for calculating upper plate 15 and is transporting up and down
Acceleration time dynamic, and/or
Upper plate 15 is provided with displacement transducer 19, is used for detecting upper plate 15 and lower plate
Primary clearance size between 16, and/or
Below lower plate 16 and on leg 17, it is provided with force transducer 20, is used for detecting
The active force that lower plate is subject to, wherein, described active force is fluid structure interaction power and plate
Gravity add and；
(6) according to the measurement system above-mentioned (1) to one of (5) Suo Shu, wherein,
Described measurement system also includes controlling subsystem 2 and data acquisition and processing subsystem 3,
Wherein, described measurement apparatus main body 1 respectively with control subsystem 2 and data acquisition and place
Reason subsystem 3 connects；
(7) according to the measurement system described in above-mentioned (6), wherein,
Described control subsystem 2 includes controller 21 and power amplifier 22；Wherein, institute
State controller 21 for being controlled the parameters of upper plate 15, example by electromagnetic exciter 13
Such as initial gap length, frequency of vibration and vibration amplitude, wherein, described primary clearance
Size is the primary clearance size between upper plate 15 and lower plate 16, and described frequency of vibration is
The frequency of vibration of upper plate, described vibration amplitude is the vibration amplitude of upper plate, and/or
Described data acquisition and procession subsystem 3 includes data acquisition module 31 and data
Processing module 32, wherein, described data acquisition module 31 is used for gathering displacement transducer
19 and the data transmitted of force transducer 20, described data processing module 32 is used for carrying out
Data process, and obtain experimental result.
Another aspect of the present invention is to provide one to utilize above-mentioned (1) to one of (6)
Described measure between systematic survey screen work or fluid structurecoupling parameter between screen work and pond
Method, specific as follows:
(8) a kind of method measuring fluid structurecoupling parameter, it is preferred to use above-mentioned (1)
To the measurement system one of (7) Suo Shu to measuring between screen work or flowing between screen work and pond
Gu coupling parameter measures, wherein, said method comprising the steps of:
Step 1, startup measurement system,
Step 2, upper plate 15 is carried out parameter setting by controlling subsystem 2, and start
Experiment,
Step 3, carry out data acquisition by data acquisition and procession subsystem 3, go forward side by side
Line number Data preprocess, obtains preliminary data,
Step 4, by data acquisition and procession subsystem 3, preliminary data is carried out data
Process eventually, obtain the additional mass under different parameters and additional damping, i.e. fluid structurecoupling
Parameter；
(9) according to the method described in above-mentioned (8), wherein, in step 2, described
Parameter includes primary clearance size, frequency of vibration and vibration amplitude, wherein, described at the beginning of
Beginning gap length is the primary clearance size between upper plate 15 and lower plate 16；Described vibration
Frequency is the frequency of vibration of upper plate 15, and it is equal to the frequency of vibration of electromagnetic exciter 13；
Described vibration amplitude is the vibration amplitude of upper plate 15, and it shakes equal to electromagnetic exciter 13
Dynamic amplitude, and/or
In step 3, described preliminary data is included in the solid coupling of the stream obtained under different parameters
Joint force and the data sequence of time；
(10) according to the method described in above-mentioned (9), wherein,
In step 4, described data process eventually and use method of least square to carry out Nonlinear Quasi
Close, obtain additional mass and additional damping,
Preferably, according to formula (3), method of least square is used to carry out non-to data sequence
Linear fit, obtains additional mass and the additional damping obtained under different parameters is arranged,
Wherein, formula (3) is as follows:
F (t)=-madAω2sin(ωt)+cadA ω cos (ω t) formula (3)
In formula (3), F (t) represents fluid structure interaction power, madRepresent additional mass,
cadRepresenting additional damping, A represents the vibration amplitude of upper plate, and ω represents the vibration frequency of upper plate
Rate, t represents the time of vibration of upper plate.
Accompanying drawing explanation
Fig. 1 illustrates the structural representation of measurement apparatus main body；
Fig. 2 illustrates the structural representation of measurement system.
Drawing reference numeral illustrates:
1-measurement apparatus main body
11-bracing frame
12-pond
13-electromagnetic exciter
14-drive rod
15-upper plate
16-lower plate
17-leg
18-accelerometer
19-displacement transducer
20-force transducer
2-controls subsystem
21-controller
22-power amplifier
3-data acquisition and procession subsystem
31-data acquisition module
32-data processing module
Detailed description of the invention
Below by accompanying drawing, the present invention is described in more detail.Illustrated by these,
The features and advantages of the invention will become more apparent from clearly.
Wherein, though the various aspects of embodiment shown in the drawings, remove
Non-specifically is pointed out, it is not necessary to accompanying drawing drawn to scale.
The measurement system of a kind of fluid structurecoupling parameter that one aspect of the present invention provides, as
Shown in Fig. 1, Fig. 2, described measurement system includes that measurement apparatus main body 1, described measurement fill
Put main body 1 and include bracing frame 11 and pond 12, between bracing frame 11 and pond 12 by under
Up it is disposed with electromagnetic exciter 13, upper plate 15, lower plate 16 and leg 17, its
In, described fluid structurecoupling parameter is between spent fuel storage rack or screen work and pond
Between fluid structurecoupling parameter, further, described fluid structurecoupling parameter refers to add
Quality and additional damping.
Wherein, described upper plate 15 is used for simulating actual spent fuel storage rack, described under
Plate 16 is used for simulating actual neighbouring screen work or actual adjacent pool, described electromagnetic exciter
13 for producing exciting force to water, and described exciting force can act on upper plate 15 then.
According to one of the present invention preferred embodiment, in pond 12, it is marked with water.
In further preferred embodiment, the water in pond 12 not have upper plate 15.
According to one of the present invention preferred embodiment, described upper plate 15 and lower plate 16 points
Wei rectangular slab.
In further preferred embodiment, described upper plate 15 and lower plate 16 are respectively
Rectangular steel plates.
In the most preferred embodiment, described rectangular steel plates is actual weary combustion
1/10 size of material storage screen work.
Wherein, described upper plate 15 can be that flat board can also be for orifice plate.
According to one of the present invention preferred embodiment, as it is shown in figure 1, described electromagnetism swashs
The device 13 that shakes is fixed on the upper end of bracing frame 11.
In further preferred embodiment, described electromagnetic exciter 13 uses sine
Ripple carries out exciting, and amplitude and the frequency of described sine wave are controlled.
Wherein, frequency and the amplitude of described electromagnetic exciter 13 can control, due to institute
State the exciting force that water produces by electromagnetic exciter 13 and act on upper plate 15, therefore, electromagnetism
The frequency of vibration of vibrator 13 is the frequency of vibration of upper plate 15, electromagnetic exciter 13
Vibration amplitude is the vibration amplitude of upper plate 15, therefore, by controlling electromagnetic exciter
The frequency of vibration of 13 and vibration amplitude can control frequency of vibration and the vibration width of upper plate 15
Value, and the frequency of vibration of upper plate 15 and vibration amplitude are that to affect fluid structurecoupling parameter (attached
Add quality and additional damping) key factor.
According to one of the present invention preferred embodiment, as it is shown in figure 1, described upper plate 15
It is connected with electromagnetic exciter 13 by drive rod 14.
In further preferred embodiment, upper plate 15 can be carried out along drive rod 14
Move up and down, for controlling different primary clearance sizes, described primary clearance size
For the primary clearance size between upper plate and lower plate.
Wherein, along with the up and down motion of upper plate 15, at the beginning of between upper plate 15 and lower plate 16
Beginning gap length changes, and the primary clearance size between upper plate 15 and lower plate 16
Also it is the key factor affecting fluid structurecoupling parameter.
According to one of the present invention preferred embodiment, as it is shown in figure 1, in described lower plate
The lower section of 16 is provided with leg 17, is used for making lower plate 16 stand on pond 12.
In further preferred embodiment, described leg 17 is more than 3, and all
The even lower section being distributed in lower plate 16.
In the most preferred embodiment, described leg 17 is 4, and uniformly
Be distributed on four angles of lower plate 16.
Wherein, the number of leg is not particularly limited, as long as lower plate can be made stably to stand on
In pond.The height of described leg can be adjusted, therefore by regulation
The height of the foot i.e. height of scalable lower plate.Preferably, described lower plate 16 and leg 17
Between connect for fixing.
According to one of the present invention preferred embodiment, as shown in Figure 1 and Figure 2, upper
Plate 15 be provided above accelerometer 18.
Wherein, described accelerometer is for calculating the upper plate 15 acceleration when moving up and down
Degree.The position that arranges of described accelerometer is not strict with, as long as being arranged at upper plate
On 15, it is possible to accurately calculate the acceleration of motion of upper plate.
According to one of the present invention preferred embodiment, as shown in Figure 1 and Figure 2, upper
Displacement transducer 19 it is provided with on plate 15.
Wherein, the position that arranges of institute's displacement sensors 19 the most strictly limits, as long as
It is arranged on upper plate 15, and the moving displacement of upper plate can be accurately measured, obtain initial
Gap length.
According to one of the present invention preferred embodiment, the lower section of lower plate 16 and
Force transducer 20 it is provided with on foot 17.
Wherein, each leg is provided with a force transducer, is used for detecting
The active force that lower plate is subject to, described active force is the fluid structure interaction power that lower plate is subject to
With the gravity of lower plate add and, so, the fluid structure interaction power that lower plate is subject to is
The intrinsic gravity adding and deducting lower plate of the power that each force transducer detects.
According to one of the present invention preferred embodiment in, as in figure 2 it is shown, described detection
System also includes controlling subsystem 2 and data acquisition and processing subsystem 3.
In further preferred embodiment, described measurement apparatus main body 1 respectively with control
Subsystem 2 and data acquisition are connected with processing subsystem 3.
Wherein, described control subsystem 2 is used for the operation of control and measure device main body 1,
Mainly control the vibration of upper plate 15 and move up and down；Described data acquisition and procession
Subsystem 3 for carrying out data acquisition to measurement apparatus main body 1, and the data to collection
Process.
According to one of the present invention preferred embodiment, as in figure 2 it is shown, described control is sub
System 2 includes controller 21 and power amplifier 22.
Wherein, controller 21 is for controlling the primary clearance size of upper plate, frequency of vibration
And vibration amplitude, wherein, described primary clearance size is between upper plate 15 and lower plate 16
Primary clearance size, described frequency of vibration is the frequency of vibration of upper plate, described vibration
Amplitude is the vibration amplitude of upper plate.Specifically: controller 21 is by controlling electromagnetic exciting
Device can control moving up and down of upper plate, then achieves between control upper plate and lower plate
Primary clearance size；Controller can control the frequency of vibration of electromagnetic exciter and shake
Dynamic amplitude, and the frequency of vibration of electromagnetic exciter and vibration amplitude are the vibration of upper plate
Frequency and vibration amplitude, therefore, controller can be by controlling shaking of electromagnetic exciter
Dynamic frequency and vibration amplitude and then control frequency of vibration and the vibration amplitude of upper plate, i.e. control
Device processed can control frequency of vibration and the vibration amplitude of upper plate by electromagnetic exciter.
In further preferred embodiment, described controller 21 receives accelerometer
The signal of 18 transmission, the displacement to upper plate accurately controls.
According to one of the present invention preferred embodiment, as in figure 2 it is shown, described data acquisition
Collection and processing subsystem 3 include data acquisition module 31 and data processing module 32.
Wherein, data acquisition module 31 is used for gathering displacement transducer 19 and force transducer
20 data transmitted, described data processing module 32 is used for carrying out data process,
To result of the test.
Another aspect of the present invention provides the measuring method of a kind of fluid structurecoupling parameter, excellent
Selection of land, utilizes above-mentioned measurement system to fluid structurecoupling between screen work and between screen work and pond
Parameter measures, and wherein, said method comprising the steps of:
Step 1, startup electromagnetic exciter 13；
Step 2, control subsystem 2 carry out parameter setting, and start test upper plate 15；
Step 3, data acquisition and procession subsystem 3 carry out data acquisition, line number of going forward side by side
Data preprocess, obtains preliminary data；
Step 4, data acquisition and procession subsystem 3 preliminary data is carried out data eventually at
Reason, obtains the additional mass under different parameters and additional damping, i.e. fluid structurecoupling parameter.
According to one of the present invention preferred embodiment, in step 2, described every ginseng
Number includes primary clearance size, frequency of vibration and vibration amplitude.
Wherein, described primary clearance size is between initial between upper plate 15 and lower plate 16
Gap size, described frequency of vibration is the frequency of vibration of upper plate 15, and it is equal to electromagnetic exciting
The frequency of vibration of device 13, described vibration amplitude is the vibration amplitude of upper plate 15, and it is equal to
The vibration amplitude of electromagnetic exciter 13.
According to one of the present invention preferred embodiment, in step 3, described just step number
According to the data sequence being included in fluid structure interaction power and the time obtained under different parameters
Row.
According to one of the present invention preferred embodiment, in step 4, described data are eventually
Process is to use method of least square that object function is carried out nonlinear fitting, is added
Quality and additional damping.
It is known that fluid force F and additional mass mad, additional damping cadAnd
Shown in the relation of actual gap size h such as formula (I):
And when lower plate is fixed, upper plate does sinusoidal motion, therefore, actual gap size h
Expression formula such as formula (2) shown in:
H=H0+ A sin (ω t) formula (2)；
Wherein, in formula (2), H0For primary clearance size, A sin (ω t) represents
The float value of the lower gap length of the vibration of upper plate, when h then represents the difference when actual experiment
Actual gap size under between.
Formula (2) substitution formula (1) can be obtained fluid structure interaction power become in time
The function changed, as shown in formula (3), this formula (3) is object function.
F (t)=-madAω2sin(ωt)+cadA ω cos (ω t) formula (3)
Wherein, in formula (3), F (t) represents fluid structure interaction power, madRepresent attached
Add quality, cadRepresenting additional damping, A represents the vibration amplitude of upper plate, and ω represents upper plate
Frequency of vibration, t represents the time of vibration of upper plate, and wherein, A and ω is experiment
Arranging value, be constant, therefore, formula (3) is the function of F (t)-t.
In the present invention, fluid structure interaction power F (t) under different time can lead to
Crossing force sensor measuring to obtain, upper plate carries out sinusoidal fortune under the control of electromagnetic exciter
Dynamic, through deriving, shown in the expression formula of fluid structure interaction power F (t) such as formula (3).
According to formula (3), utilize method of least square to carry out nonlinear fitting, can be added
Quality madWith additional damping cad。
According to one of the present invention preferred embodiment, in formula (3), if-madAω2
For constant a, cadA ω is constant b, sin (ω t) be x, cos (ω t) be y, then formula (3)
Can be expressed as shown in formula (3-1):
F (x, y)=ax+by formula (3-1)
Wherein, in formula (3-1), a Yu b is undetermined coefficient, x Yu y is the function of t,
Therefore, it can the series data according to t and respectively obtain the series data of x and y, therefore,
The data sequence of F (t)-t can be converted into F (x, y)-(x, data sequence y).
In further preferred embodiment, with formula (3-1) as object function, root
According to F (x, y)-(x, data sequence y), utilize method of least square to carry out nonlinear fitting,
Obtain the value of undetermined coefficient a and b.
In the most preferred embodiment, due to a=-madAω2, b=cadA ω,
And A and ω is known fixed, m therefore can be obtainedadAnd cad, i.e. added
Quality and additional damping.
Wherein, method of least square is a kind of mathematical optimization techniques.It is typically based on data
Feature, structure meets the object function of data characteristic, and wherein, object function contains one
Individual or multiple undetermined coefficients, method of least square is by minimizing real data and target letter
The error of number, determines undetermined coefficient, in which it is assumed that F (t) is object function, and Fdata(t)
For real data sequence, then nonlinear fitting i.e. finds treating when meeting formula (4) minimum
Determine coefficient.
In invention, specifically, object function is shown in formula (3) or formula (3-1)
Function, and, a Yu b is the undetermined coefficient of function shown in formula (3-1), and then according to
The value of undetermined coefficient tries to achieve additional mass madWith additional damping cad。
According to one of the present invention preferred embodiment, with formula (3-1) as object function,
A Yu b is undetermined coefficient, carries out nonlinear fitting, when searching meets formula (4-1) minimum
Undetermined coefficient a and b.
In the most preferred embodiment, ask according to the value of undetermined coefficient a with b
Go out the additional mass (m under different primary clearance sizesad) and additional damping (cad)。
Therefore, by measurement system of the present invention, can obtain under different parameters
Additional mass and additional damping, and, can respectively obtain initially through reductive analysis
Gap length is different, frequency of vibration is different different with vibration amplitude to additional mass (mad)
With additional damping (cad) impact.
According to one of the present invention preferred embodiment, can be distinguished by data analysis
Obtain the shadow of the solid coupling parameter of frequency of vibration, vibration amplitude and primary clearance size convection current
Ring.
In further preferred embodiment, divided by the method controlling independent variable
Do not obtain the solid coupling parameter of frequency of vibration, vibration amplitude and primary clearance size convection current
Impact.
In the most preferred embodiment:
(1) identical frequency of vibration, identical vibration amplitude, different primary clearance are chosen big
Little First Series data, wherein, not being both due to just of described First Series data
The difference of beginning gap length causes, and therefore can obtain different primary clearance size convection current
Gu the impact of coupling parameter；
(2) identical vibration amplitude, identical primary clearance size, different vibration frequency are chosen
The second series data of rate, wherein, not being both owing to shaking of described second series data
The difference of dynamic frequency causes, and therefore can obtain different frequency of vibration and join fluid structurecoupling
The impact of number；
(3) identical frequency of vibration, identical primary clearance size, different vibration width are chosen
3rd series data of value, wherein, not being both owing to shaking of described 3rd series data
The difference of dynamic amplitude causes, and therefore can obtain different vibration amplitude and join fluid structurecoupling
The impact of number.
In sum, join according to measurement systematic survey fluid structurecoupling provided by the present invention
The method of number, can obtain the additional mass under different parameters and additional damping, and
Respectively obtain the solid coupling parameter of primary clearance size, frequency of vibration and vibration amplitude convection current
Impact, provide sufficient experimental data for later stage Seismic Design.
In the present invention, described screen work is the abbreviation of spent fuel storage rack.
The present invention is had the advantage that to include:
(1) simple in measurement system structure provided by the present invention, easy to use；
(2) in the measurement apparatus main body of measurement system of the present invention, upper plate can be flat
Plate can also be orifice plate, and therefore, measurement system provided by the present invention is possible not only to survey
The fluid structurecoupling parameter obtaining flat board can also record the fluid structurecoupling parameter of orifice plate；
(3) can obtain under different parameters arranges by method provided by the present invention
Fluid structurecoupling parameter, it is possible to reflect the Coupling effect of seepage rock deformation of reality more accurately, for
Earthquake analysis or Aseismic Design offer precise data.
Embodiment
Step 1, startup measurement system.
Wherein, in this embodiment, the measurement apparatus main body with four legs is used,
Therefore, four legs of this measurement apparatus main body are respectively arranged with four power sensings
Device.
Step 2, by control subsystem carry out parameter setting: primary clearance size is
0.035mm, vibration amplitude 0.002m, frequency of vibration 5Hz, start experiment.
Step 3, carry out data acquisition by data acquisition and procession subsystem 3, obtain
Power on four legs and the relation (seeing table 1) of time, line number of going forward side by side Data preprocess,
Obtain the data sequence (seeing table 2) of fluid structure interaction power and time.
The data that table 1 gathers
| t | F1 | F2 | F3 | F4 | F |
| 0 | -2.83738 | -3.12111 | -2.97924 | -2.69551 | -11.6332 |
| 0.01 | -1.49967 | -1.64964 | -1.57465 | -1.42469 | -6.14865 |
| 0.02 | -0.01532 | -0.01685 | -0.01608 | -0.01455 | -0.06279 |
| 0.03 | 1.470537 | 1.617591 | 1.544064 | 1.397011 | 6.029203 |
| 0.04 | 2.812589 | 3.093848 | 2.953218 | 2.671959 | 11.53161 |
| 0.05 | 3.879601 | 4.267562 | 4.073581 | 3.685621 | 15.90637 |
| … | … | … | … | … | … |
Wherein, in Table 1, F1～F4Represent the force transducer sense on four legs respectively
The size (the most automatically deducting the weight of lower plate) of the power being subject to, F is F1～F4Make a concerted effort,
I.e. fluid structure interaction power.When data process, choose first F that makes a concerted effort closest to 0
Data, as new equilibrium point, intercept the data of 2 sinusoidal cycles, formed such as table
Data sequence (preliminary data) shown in 2.
Table 2 preliminary data
Step 4, by data acquisition and procession subsystem preliminary data carried out data eventually
Process, obtain additional mass and additional damping is respectively 6.8 and 0.2.
In describing the invention, it should be noted that term "up" and "down"
It is based on the orientation under duty of the present invention or position in the orientation indicated or position relationship
Put relation, be for only for ease of description the present invention and simplify describe rather than instruction or
Device or the element of hint indication must have specific orientation, with specific orientation structure
Make and operate, be therefore not considered as limiting the invention.
Above in association with preferred embodiment describing the present invention, but this
A little embodiments are only exemplary, only play illustrative effect.On this basis,
The present invention can be carried out multiple replacement and improvement, these each fall within the protection of the present invention
In the range of.
Claims (10)
1. a measurement system for fluid structurecoupling parameter, described fluid structurecoupling parameter is weary
Fluid structurecoupling parameter between bunkering screen work or between screen work and pond, it is special
Levying and be, described measurement system includes measurement apparatus main body (1), described measurement apparatus
Main body (1) includes bracing frame (11) and pond (12), at bracing frame (11) and
Be disposed with from top to bottom between pond (12) electromagnetic exciter (13), upper plate (15),
Lower plate (16) and leg (17).
Measurement system the most according to claim 1, it is characterised in that
Described electromagnetic exciter (13), then will excitation for water produces exciting force
Power acts on upper plate (15)；
Described upper plate (15) is used for simulating actual spent fuel storage rack；
Described lower plate (16) is used for simulating actual neighbouring screen work or actual adjacent pool；
Described leg (17) is used for making lower plate (16) stand on pond (12).
Measurement system the most according to claim 2, it is characterised in that
Described upper plate (15) and lower plate (16) are respectively rectangular slab, preferably rectangular
Steel plate；And/or
Described electromagnetic exciter (13) is fixed on the upper end of bracing frame (11)；With/
Or
Described upper plate (15) is by drive rod (14) with electromagnetic exciter (13) even
Connect；And/or
Described leg (17) is more than 3, and described leg (17) is symmetrically distributed in
The lower section of lower plate (16), it is preferable that described leg (17) is 4, and the most all
It is distributed on four angles of lower plate (16) evenly.
Measurement system the most according to claim 3, it is characterised in that
Described electromagnetic exciter (13) uses sine wave to carry out exciting, described sine wave
Amplitude and frequency controlled；And/or
Upper plate (15) can move up and down along drive rod (14), is used for controlling
Different primary clearance sizes, described primary clearance size is between upper plate and lower plate
Primary clearance size.
Measurement system the most according to claim 4, it is characterised in that
Upper plate (15) is provided with accelerometer (18), is used for calculating upper plate (15)
Acceleration when moving up and down；And/or
Upper plate (15) is provided with displacement transducer (19), is used for detecting upper plate (15)
And the primary clearance size between lower plate (16)；And/or
Lower plate (16) lower section and on leg (17), be provided with force transducer (20),
For detecting the active force that lower plate is subject to, wherein, described active force is that fluid structurecoupling is made
Firmly with the gravity of plate add and.
6. according to the measurement system one of claim 1 to 5 Suo Shu, it is characterised in that
Described measurement system also includes controlling subsystem (2) and data acquisition and processing subsystem
(3), wherein, described measurement apparatus main body (1) respectively with control subsystem (2)
It is connected with processing subsystem (3) with data acquisition.
Measurement system the most according to claim 6, it is characterised in that
Described control subsystem (2) includes controller (21) and power amplifier (22)；
Wherein, described controller (21) is for controlling upper plate by electromagnetic exciter (13)
(15) parameters, such as primary clearance size, frequency of vibration and vibration amplitude,
Wherein, described primary clearance size is at the beginning of between upper plate (15) and lower plate (16)
Beginning gap length, described frequency of vibration is the frequency of vibration of upper plate, described vibration amplitude
Vibration amplitude for upper plate；And/or
Described data acquisition and procession subsystem (3) includes data acquisition module (31)
With data processing module (32), wherein, described data acquisition module (31) is used for adopting
The data that collection displacement transducer (19) and force transducer (20) are transmitted, described number
It is used for carrying out data process according to processing module (32), obtains experimental result.
8. the method measuring fluid structurecoupling parameter, preferably by claim 1 to 7
One of described measurement system to fluid structurecoupling parameter between screen work or between screen work and pond
Measure, wherein, said method comprising the steps of:
Step 1, startup measurement system；
Step 2, by control subsystem (2) upper plate (15) is carried out parameter setting,
And start experiment；
Step 3, carry out data acquisition by data acquisition and procession subsystem (3),
Line number of going forward side by side Data preprocess, obtains preliminary data；
Step 4, by data acquisition and procession subsystem (3), preliminary data is carried out
Data process eventually, obtain the additional mass under different parameters and additional damping, i.e. stream solid
Coupling parameter.
Method the most according to claim 8, wherein,
In step 2, described parameter includes primary clearance size, frequency of vibration and vibration
Amplitude, wherein, described primary clearance size be upper plate (15) with lower plate (16) it
Between primary clearance size；Described frequency of vibration is the frequency of vibration of upper plate (15),
It is equal to the frequency of vibration of electromagnetic exciter (13)；Described vibration amplitude is upper plate (15)
Vibration amplitude, it is equal to the vibration amplitude of electromagnetic exciter (13)；And/or
In step 3, described preliminary data is included in the solid coupling of the stream obtained under different parameters
Joint force and the data sequence of time.
Method the most according to claim 9, wherein,
In step 4, described data process eventually and use method of least square to carry out Nonlinear Quasi
Close, obtain additional mass and additional damping；
Preferably, according to formula (3), method of least square is used to carry out non-to data sequence
Linear fit, obtains additional mass and the additional damping obtained under different parameters is arranged；
Wherein, formula (3) is as follows:
F (t)=-madAω2sin(ωt)+cadA ω cos (ω t) formula (3)
In formula (3), F (t) represents fluid structure interaction power, madRepresent additional mass,
cadRepresenting additional damping, A represents the vibration amplitude of upper plate, and ω represents the vibration frequency of upper plate
Rate, t represents the time of vibration of upper plate.
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| CN108362459A (en) * | 2018-05-17 | 2018-08-03 | 上海核工程研究设计院有限公司 | A kind of 1x9 types spent fuel storage rack shock test part |
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