CN109374250A - Aircraft pipeline solid liquid interation test device under multi-source excitation - Google Patents
Aircraft pipeline solid liquid interation test device under multi-source excitation Download PDFInfo
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- CN109374250A CN109374250A CN201811559098.9A CN201811559098A CN109374250A CN 109374250 A CN109374250 A CN 109374250A CN 201811559098 A CN201811559098 A CN 201811559098A CN 109374250 A CN109374250 A CN 109374250A
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- G—PHYSICS
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
- G01M7/06—Multidirectional test stands
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Abstract
The present invention relates to pipeline the field of test technology, propose a kind of aircraft pipeline solid liquid interation test device under multi-source excitation.Aircraft pipeline solid liquid interation test device under multi-source excitation tests developmental tube, developmental tube is bending tube, with first end, second end and at least one bending part, aircraft pipeline solid liquid interation test device under multi-source excitation includes vibrational excitation structure, fixed structure, fluid pressure pulse incentive structure, detection structure and enclosed construction.Vibrational excitation structure is for providing vibrational excitation；Fixed structure is installed on vibrational excitation structure, the fixed developmental tube of fixed structure；The connection of the first end of fluid pressure pulse incentive structure and developmental tube；Detection structure is set to developmental tube, needs measurement parameter for measure developmental tube；Enclosed construction is set to the second end of developmental tube, so that second end is closed.The fluid structurecoupling of developmental tube in the case where can measuring while have vibrational excitation and fluid pressure pulse to motivate.
Description
Technical field
A kind of the present invention relates to pipeline the field of test technology more particularly to aircraft pipelines under multi-source excitation fluid structurecoupling
Vibration-testing apparatus.
Background technique
Aircraft pipe-line system is the important channel of medium transmission and energy transmission, is related to the hydraulic of aircraft, fuel oil etc.
Critical system.With the ultrahigh speed of advanced opportunity of combat, the high performance requirements such as motor-driven, airborne hydraulic and fuel system are respectively towards high pressure
Power, high power to weight ratio, big flow direction develop.The raising of engine power in flight course, is quickly opened high-low pressure alternating
During closing the acute variations such as valve events, big Flight Acceleration, pipeline structure is in internal fluid pressure pulsation and outside
The integrated environment of housing construction vibration, the fatigue resistance of aviation pipeline system are particularly problematic.According to statistics, the pipeline system of developmental tube
" evaporating, emitting, dripping or leaking of liquid or gas " failure caused by system vibration accounts for about 30% or more of air line total failare.
The Service Environment of the advanced hydraulic plumbing system of aircraft is very special, not only by the lasting arteries and veins of internal high pressure fluid
Movement is used, and this pulsation is not clear with the affecting laws of the intrinsic frequency of the pipeline configuration of the variation and developmental tube of cast,
Verification experimental verification lacks effective means.Meanwhile the various vibrations that housing construction generates in flight course are inevitably transmitted
Come on to pipeline structure.
The pipe-line system that can complete developmental tube at present combines pulsation in conjunction with the examination of body vibration in different pressures system
Testing platform is almost blank.Traditional experiment platform can be used for meeting one of them function, and the combination that can not implement multi-source excitation applies
With vibration-testing developmental tube.
Therefore, it is necessary to design a kind of new aircraft pipeline solid liquid interation test device under multi-source excitation.
Above- mentioned information disclosed in the background technology part are only used for reinforcing the understanding to background of the invention, therefore it can
To include the information not constituted to the prior art known to persons of ordinary skill in the art.
Summary of the invention
It is an object of the invention to overcome the shortcomings of that the above-mentioned prior art cannot achieve the measurement of multi-source incentive combination, one is provided
Plant the aircraft pipeline that the measurement of multi-source incentive combination may be implemented solid liquid interation test device under multi-source excitation.
Additional aspect and advantage of the invention will be set forth in part in the description, and partly will be from description
It is apparent from, or can practice through the invention and acquistion.
According to an aspect of the present invention, a kind of aircraft pipeline solid liquid interation test device under multi-source excitation,
Developmental tube is tested, the developmental tube is bending tube, has first end, second end and at least one bending part, described
Aircraft pipeline multi-source excitation under solid liquid interation test device include:
Vibrational excitation structure, for providing vibrational excitation；
Fixed structure, is installed on the vibrational excitation structure, and the fixed structure is capable of fixing the developmental tube；
Fluid pressure pulse incentive structure is connect, for applying pressure fluctuation with the first end of the developmental tube；
Detection structure is set to the developmental tube, needs measurement parameter for measure the developmental tube；
Enclosed construction, set on the second end of the developmental tube, so that the second end is closed.
In a kind of exemplary embodiment of the disclosure, aircraft pipeline solid liquid interation under multi-source excitation is surveyed
Trial assembly is set further include:
Manifold, is installed on the fixed structure, and the manifold has an entrance and multiple outlets, and the entrance and institute
Outlet rounding off connection is stated, the fluid pressure pulse incentive structure is connected to the entrance, and the of multiple developmental tubes
One end is connected to the outlet correspondingly.
In a kind of exemplary embodiment of the disclosure, the central axis of the central axis of the entrance and the outlet is flat
Row setting.
In a kind of exemplary embodiment of the disclosure, the central axis of the outlet swashs with the vibrational excitation structure
Vibration direction is vertical.
In a kind of exemplary embodiment of the disclosure, aircraft pipeline solid liquid interation under multi-source excitation is surveyed
Trial assembly is set further include:
Hose is connected, is connected between the fluid pressure pulse incentive structure and the entrance of the manifold.
In a kind of exemplary embodiment of the disclosure, the fluid pressure pulse incentive structure is capable of providing maximum pressure
High-pressure fluid source more than or equal to 35Mpa.
In a kind of exemplary embodiment of the disclosure, the vibrational excitation structure is that maximum exciting force is less than or equal to
The shake table of 100KN.
In a kind of exemplary embodiment of the disclosure, the detection structure includes:
Strain transducer, set on the outer wall of the first end of the developmental tube；
Acceleration transducer, between the second end and the bending part of the developmental tube or the developmental tube
The second end and the bending part between two neighboring bending part.
In a kind of exemplary embodiment of the disclosure, the detection structure further include:
Displacement sensor, between the second end and the bending part of the developmental tube or the developmental tube
Between the second end and the bending part between two neighboring bending part.
In a kind of exemplary embodiment of the disclosure, the enclosed construction includes pressure sensor.
As shown from the above technical solution, the present invention has at least one of following advantages and good effect:
Aircraft pipeline of the present invention solid liquid interation test device under multi-source excitation, tests developmental tube, tries
Testing pipe is bending tube, has first end, second end and at least one bending part, and developmental tube is fixed on vibration by fixed structure
On incentive structure, fluid pressure pulse incentive structure is connect with developmental tube.It, can be to examination in only vibrational excitation arrangement works
Pipe is tested test when with vibrational excitation, it, can be to developmental tube when only fluid pressure pulse incentive structure works
It is tested when being motivated with fluid pressure pulse, when vibrational excitation structure and fluid pressure pulse incentive structure while work
When making, the fluid structurecoupling of developmental tube in the case where can measuring while have vibrational excitation and fluid pressure pulse to motivate.
Detailed description of the invention
Its example embodiment is described in detail by referring to accompanying drawing, above and other feature of the invention and advantage will become
It is more obvious.
Fig. 1 is aircraft pipeline solid liquid interation schematic structural diagram of testing device under multi-source excitation；
Fig. 2 is the structural schematic diagram that manifold is mounted on fixed structure；
Fig. 3 is the structural schematic diagram for considering connecting tube when bending position influences test；
Fig. 4 is the structural schematic diagram for considering connecting tube when bending radius influences test；
Fig. 5 is the structural schematic diagram for considering connecting tube when bending angle influences test；
Fig. 6 is tubular and sensor arrangement position the schematic diagram of test；
Fig. 7 is the schematic diagram of the assembled scheme in different excitation sources；
Fig. 8 is the flow diagram in embodiment；
Fig. 9 is first order resonant, pressure 21MPa, amplitude when the being 5% acceleration responsive comparison (side X under combination of stimulation
To) waveform diagram；
Figure 10 is first order resonant, pressure 21MPa, amplitude when the being 5% acceleration responsive comparison (side Y under combination of stimulation
To) waveform diagram；
Figure 11 is first order resonant, pressure 21MPa, amplitude when the being 5% acceleration responsive comparison (side Z under combination of stimulation
To) waveform diagram；
Acceleration responsive comparison (Y-direction) under combination of stimulation when being 5% that Figure 12 is off-resonance, pressure 21MPa, amplitude
Waveform diagram；
Acceleration responsive comparison (X-direction) under combination of stimulation when Figure 13 is second-order resonance, pressure 21MPa, amplitude 5%
Waveform diagram；
Acceleration responsive comparison (Y-direction) under combination of stimulation when Figure 14 is second-order resonance, pressure 21MPa, amplitude 5%
Waveform diagram；
Acceleration responsive comparison (Z-direction) under combination of stimulation when Figure 15 is second-order resonance, pressure 21MPa, amplitude 5%
Waveform diagram；
Figure 16 is first order resonant, pressure 21MPa, and strain-responsive compares (face foreign side under combination of stimulation when amplitude is 5%
To) waveform diagram；
Figure 17 is first order resonant, pressure 21MPa, and (in face side for strain-responsive comparison under combination of stimulation when amplitude is 5%
To) waveform diagram；
Figure 18 is off-resonance, pressure 21MPa, and strain-responsive compares (face outside direction) under combination of stimulation when amplitude is 5%
Waveform diagram；
Figure 19 is off-resonance, pressure 21MPa, and strain-responsive compares (direction in face) under combination of stimulation when amplitude is 5%
Waveform diagram；
The reference numerals are as follows for main element in figure:
1, vibration excitation device；
2, fixed structure；21, mounting portion；22, bottom plate；23, through-hole；
3, fluid pressure pulse incentive structure；4, developmental tube；5, hose is connected；61, entrance；62, it exports；7, acceleration
Sensor；8, strain transducer；9, enclosed construction.
Specific embodiment
Example embodiment is described more fully with reference to the drawings.However, example embodiment can be with a variety of shapes
Formula is implemented, and is not understood as limited to embodiment set forth herein；On the contrary, thesing embodiments are provided so that the present invention will
Fully and completely, and by the design of example embodiment comprehensively it is communicated to those skilled in the art.Identical attached drawing in figure
Label indicates same or similar structure, thus the detailed description that will omit them.
The present invention provides a kind of aircraft pipeline solid liquid interation test device under multi-source excitation, to developmental tube 4 into
Row test, developmental tube 4 are bending tube, have first end, second end and at least one bending part, shown referring to Fig.1, aircraft
Pipeline multi-source excitation under solid liquid interation test device may include, fixed structure 2, fluid pressure pulse incentive structure 3,
Detection structure and enclosed construction 9.Vibrational excitation structure 1 is for providing vibrational excitation；Fixed structure 2 is installed on vibrational excitation knot
Structure 1, the fixed developmental tube 4 of fixed structure 2；Fluid pressure pulse incentive structure 3 is connect with the first end of developmental tube 4；Detection structure
Set on developmental tube 4, measurement parameter is needed for measure developmental tube 4；Enclosed construction 9 is set to the second end of developmental tube 4, so that the
Two end seals are closed.
In the work of only vibrational excitation structure 1, can to the testing when with vibrational excitation of developmental tube 4, when
When only fluid pressure pulse incentive structure 3 works, developmental tube 4 can be surveyed when motivating with fluid pressure pulse
Examination can measure when vibrational excitation structure 1 and fluid pressure pulse incentive structure 3 work at the same time while have vibration sharp
The fluid structurecoupling of developmental tube 4 in the case where encouraging with fluid pressure pulse excitation.
It is illustrated by taking the test of the fluid structurecoupling of aircraft hydraulic guard system as an example below.
In this example embodiment, shown referring to Fig.1, vibrational excitation structure 1 can be shake table, be used to simulate winged
Vibrational excitation, airborne equipment operation when machine engine difference is driven are transmitted to vibration and impact of body etc..Pass through shake table
It is motivated to simulate external vibration, 10 tons of shake tables of product of Suzhou Dongling Vibration Test Instrument Co., Ltd are selected in this test.
For water-cooled platform electromagnetic vibration test system, thrust is big, and bearing capacity is strong, and cooling efficiency is high.Sinusoidal vibration, random can be respectively completed
Vibration and shock response spectrum test.Maximum exciting force is 100KN, frequency 0Hz-2200Hz, can be used to simulate pipeline and fly
The external drive being subject in journey.The upper surface of vibrational excitation structure 1 is provided with multiple threaded holes, for installing fixed structure 2.
Fixed structure 2 is installed in vibrational excitation structure 1.Referring to shown in Fig. 2, fixed structure 2 may include bottom plate 22 with
Mounting portion 21, mounting portion 21 are set to side of the bottom plate 22 far from vibrational excitation structure 1, and bottom plate 22 can be rectangular slab,
It can be the plate of circular slab, triangular plate, elliptical flat-plate or other shapes；Multiple through-holes 23 can be set on bottom plate 22,
Through-hole 23 is arranged in a one-to-one correspondence with threaded hole, is passed through through-hole 23 by screw and is fixed bottom plate 22 with and with corresponding threaded holes conjunction
In vibrational excitation structure 1.Developmental tube 4 is fixed on mounting portion 21, and mounting portion 21 is connect with bottom plate 22, so that developmental tube 4 is solid
It is scheduled in vibrational excitation structure 1, vibrational excitation structure 1 vibrates fixed structure 2, so that developmental tube 4 vibrates, realization is given
Developmental tube 4 applies vibrational excitation.
Shown in referring to Fig.1, fluid pressure pulse incentive structure 3 is connect with the first end of developmental tube 4, be can be and is capable of providing
Maximum pressure is the high-pressure fluid source more than or equal to 35Mpa, and the maximum pressure provided can be 40Mpa, and pressure system is according to boat
The actual conditions of empty hydraulic test pipe 4 can choose tri- kinds of pressure systems of 21MPa, 28MPa, 35MPa.Metered flow is about
120L/min, power of motor are about 55KW, and fuel tank is about 300L, and the amplitude of pressure fluctuation may be set to 5%, 10% and (fly
Machine design manual requires amplitude of pressure fluctuation less than 10%).High-pressure fluid source system can manufacture stable the fluctuating frequency of pressure
Lower than 15Hz, the waveform of pulsation has triangular wave, square wave, sine wave etc. optional, can be set to using sinusoidal pulsation wave, ripple frequency
The first natural frequency and anti-resonance frequency (12Hz) of developmental tube 4.Hydraulic pulsation parameter passes through matched computer software
Control provides pressure fluctuation for developmental tube 4.
Referring to shown in Fig. 2, in this example embodiment, aircraft pipeline solid liquid interation under multi-source excitation is tested
Device can also include manifold, and manifold is set to mounting portion 21, at this point, mounting portion 21 can be a cuboid block, manifold is set
It sets inside mounting portion 21, manifold may include an entrance 61 and multiple outlets 62, and entrance 61 and fluid pressure pulse motivate
Structure 3 connects, and multiple outlets 62 connect one to one with developmental tube 4.The quantity of outlet 62 can be two, be also possible to three
Or more, entrance 61 is connect with 62 rounding ofves of outlet.The central axis of outlet 62 can hang down with the axle center contour of entrance 61
Straight setting, the central axis of entrance 61 and the upper surface of vibrational excitation structure 1 are arranged in parallel, export 62 central axis also with vibration
The top face of dynamic incentive structure 1 is arranged in parallel.Certainly, the central axis of entrance 61 can also be with the centerline axis parallel of outlet 62
Setting will not to test in this way when applying fluid pressure pulse excitation because manifold tube wall undertakes more pressure fluctuation
The pressure fluctuation of pipe 4 reduces.It only needs for developmental tube 4 to be mounted in the outlet of manifold, not to mounting means and installation
Angle does concrete restriction, i.e., does not do concrete restriction to the export direction of manifold.The central axis of outlet 62 can be with vibrational excitation
The direction of excitation of structure 1 is vertical.
Developmental tube 4 is bending tube, has bending part, first end and second end, and the outlet 62 of first end and manifold connects,
Second end is closed by enclosed construction 9.The quantity of developmental tube 4, which can be, can also be, two, three or more, manifold
One outlet connects a developmental tube 4.Bending part on each developmental tube 4 can be one, be also possible to multiple.
Here there is one situation to be illustrated for the bending part on three and each developmental tube 4 with developmental tube 4, join
According to shown in Fig. 3, when considering influence of the bending position to the test test of developmental tube 4, bending part can be set respectively to be tried at three
It tests at 1/4,1/2 and the 3/4 of pipe 4 and is bent, bending radius 4D, D are the diameter of developmental tube, and bending angle is 90 °.
Referring to shown in Fig. 4, when considering that bending radius influences the test of developmental tube, bending part can be arranged at three
At the 1/2 of a developmental tube 4, bending angle is set to 90 °, and the bending radius of three developmental tubes 4 is respectively 2D, 4D and 6D.
Referring to Figure 5, in the influence that consideration bending angle tests developmental tube 4, bending part can be arranged at
Three developmental tubes 4 at 1/2, bending radius is 4D, and bending angle is 90 °, 120 ° and 150 °.
When the first order resonant under external vibration excitation occurs, developmental tube 4 responds (acceleration and Root Stress) with bending
The increase of position and angle and increase, first reduce with the increase of bending radius and increase afterwards；Under fluid pressure pulse occurs and motivates
First order resonant when, developmental tube 4 respond (acceleration and Root Stress) with bending position, radius increase first increases and then decreases,
Reduce with the increase of bending angle.
Shown referring to Fig.1 in this example embodiment, aircraft pipeline solid liquid interation under multi-source excitation is tested
Device can also include connection hose 5, connection hose 5 be connected to fluid pressure pulse incentive structure 3 and manifold entrance 61 it
Between, it can be when vibrational excitation structure 1 works using hose, the influence of fluid pressure impulse excitation structure is smaller, Ke Yiyou
Reduce experimental error in effect ground.
Referring to shown in Fig. 6, detection device may include strain transducer 8, acceleration transducer 7 and displacement sensor；
Strain transducer 8 can be common resistance strain plate, model BEH120-3AA-D-D100, and resistance is 120 Ω, strain
Sensor 8 is located at the outer wall in 4 first end of developmental tube, for measuring the strain of the developmental tube 4, i.e., in external force and non-uniform temperature
The factors such as field act on the relative deformation of lower developmental tube 4.
In the case where developmental tube 4 has a bending part, displacement sensor, which can be set, is being set to the second of developmental tube 4
Between end and bending part.In the case where developmental tube 4 has multiple bending parts, displacement sensor be can be set in developmental tube 4
Between second end and bending part between two neighboring bending part, for testing multiple positions under vibrational excitation on developmental tube 4
Set the displacement on direction of excitation.
Acceleration transducer 7 can be set between the second end and bending part for being set to developmental tube 4 or developmental tube 4 the
Between two ends and bending part between two neighboring bending part, for test under vibrational excitation developmental tube 4 in direction of excitation
Acceleration.Acceleration transducer 7 can use the lesser PCB 352C22 sensor of quality, can measuring acceleration range be ±
500g meets pipe-line system acceleration test range.
In this example embodiment, enclosed construction 9 may include pressure sensor, and pressure sensor is for measuring pressure
Pulsation.Enclosed construction can increase the quality of test pipeline, reduce the first natural frequency of 4 pipe-line system of developmental tube, fall it
(it is less than 15Hz) within the scope of the available impulse excitation of high-pressure fluid source.
Referring to shown in Fig. 7, when applying pressure fluctuation excitation and vibrational excitation at the same time, there are three supercharging pressure grades for tool
21MPa, 28MPa, 35MPa, the frequency that vibrational excitation structure is corresponded under each pressure rating is three, respectively first order resonant,
Off-resonance and second-order resonance.There are two 5% and 10% for the amplitude that corresponding pressure is pulsed under above-mentioned each supercharging pressure grade；
Each amplitude corresponds to two frequencies, and two frequencies are resonance and off-resonance.By the incentive action of two different driving sources in examination
It tests on part, one shares 36 kinds of combinations, can analyze shake table frequency, pressure fluctuation by the comparison between various combination mode
In the influence to response of pressure size, amplitude and frequency.
In this example embodiment, aircraft pipeline solid liquid interation test device under multi-source excitation can also be wrapped
Data acquisition instrument is included, is connect with above-mentioned each sensor, for acquiring the information on sensor and being converted to data information.Add
Speed data acquisition instrument can select hundred million perseverance MI-7008 data acquisition instruments, can carry out data acquisition and live signal point
Analysis, data record and off-line analysis, model analysis, acoustic analysis, impact and shock response spectrum analysis etc., are mainly used in test
Model analysis and data acquisition and real-time signal analysis.
The DH5922N that strain data acquisition instrument can select Jiangsu Dong Hua measuring technology limited liability company to produce is dynamic
The acquisition of state data and analysis system.
In test, after ensuring that above-mentioned device can work normally, each device is connected according to above-mentioned connection relationship
It is connected together, is loaded according to the driving frequency of real work, tested using sensor.
Below by way of being more clear advantages of the present invention in a specific embodiment.
Referring to shown in Fig. 8, testing process can be divided into four steps, the first step, 4 filling liquid modal test of developmental tube is used
In the intrinsic frequency of measurement developmental tube；Second step, single pressure fluctuation exciter response test；Third step, single vibrational excitation response examination
It tests；4th step, combination of stimulation response test.
Example is carried out using a relatively simple developmental tube 4, developmental tube 4 chooses 90 degree of bend pipes, 61 straight pipe pipe of entrance
Long l1=400mm exports 62 straight pipe pipe range l2=400mm, bore d1=6.4mm, outside diameter d2=8mm, wall thickness t=
0.8mm, bending radius are R=4 × d2=32mm.
Response when causing developmental tube 4 to resonate for Study of Fluid exciting, because of fluid pressure pulse incentive structure 3 used
Frequency is lower, and the way of restraint that developmental tube uses in this example is fixed for first end, and second end is free, and the of developmental tube 4
Two ends install enclosed construction additional, increase by 4 mass of developmental tube, reduce the first natural frequency of pipe-line system, it is made to fall in Fluid pressure
(it is less than 15Hz) within the scope of the available impulse excitation of pulse excitation structure.
Testing the specific value measured is microstrain (μ ε), and the conversion relation of microstrain and strain stress is ε=106με.Test
In under the static pressure state of operating condition corresponding pressure system carry out deformeter " zero " operate, i.e., by static pressure under corresponding pressure system
The strain of developmental tube 4 of state is set as 0.The result of stress need to be by being calculated: S=E ε, and wherein S is stress, and E is developmental tube
4 elasticity modulus, it is related with the material of developmental tube 4 itself.
Referring to shown in table one: 4 intrinsic frequency of developmental tube does not change with the variation of pressure system in developmental tube 4, the
First natural frequency variation may be caused greatly due to measurement error.Selection 7.708Hz is first order resonance frequency (three different one
Rank intrinsic frequency is averaged),
Table one: filling liquid developmental tube 4 intrinsic frequency test result (Hz) statistical form under each state
It is the contrast test to acceleration responsive below.
Selection fluid pressure pulse P is P=21+21 × 5% × sin (2 π ω t), wherein ω is fluid pressure pulse frequency
Rate, t are the time.It chooses fluid pressure pulse first order resonance frequency and anti-resonance frequency, the excited frequency of vibrational excitation structure is
First order resonant, off-resonance, second-order resonance frequency.Response that single fluid pressure fluctuation is motivated, single vibrational excitation structural response and
Combination of stimulation response compares.
Referring to shown in Fig. 9 and Figure 10, when pressure 21MPa amplitude is 5%, the response variation of combination of stimulation and fluid
The variation of the fluctuating frequency of pressure has very big association, and the vibrational excitation frequency of vibrational excitation structure is constant, only changes Fluid pressure arteries and veins
Dynamic frequency.
Referring to Fig. 6, in the Y direction, the response of single fluid pressure fluctuation is changed into 0.052G by 0.425G, and when resonance flows
Response caused by body pressure fluctuation is 8.173 times of off-resonance, and combination of stimulation response changes due to fluid pressure pulse frequency
Acceleration responsive is caused to become 6.35G from 6.54G, response when fluid pressure pulse resonates is 1.03 times of off-resonance, fluid
The fluctuating frequency of pressure variation is smaller on combination of stimulation response influence, and the rigidity of developmental tube 4 is larger, and responding on combination of stimulation influences
It is very weak.
Referring to shown in table two, combination of stimulation, which responds more single exciter response, different degrees of increase.Vibrational excitation structure
Master drive direction (Y-direction) combination of stimulation response be single fluid pressure fluctuation response 15.4 times, be single vibrational excitation knot
1.25 times of the vibrational excitation response of structure；The response of master drive direction (Z-direction) combination of stimulation of fluid pressure pulse excitation is
16.8 times of single fluid pressure fluctuation response, are 1.82 times of the vibrational excitation of single vibrational excitation structure.Combination of stimulation is to monitoring
The acceleration in three directions of point generates different degrees of influence, is affected to Z-direction response.
Table two: pressure 21MPa, amplitude 5%, first order resonant place an order excitation and combination of stimulation acceleration responsive comparison unite
Count table
Referring to Fig.1 shown in 2, combination of stimulation, which responds more single exciter response, different degrees of increase.In vibrational excitation knot
Structure master drive direction (Y-direction), combination of stimulation response are 1.66 times of single high-pressure fluid source exciter response, are single vibrational excitation knots
1.15 times of structure vibrational excitation response；In the master drive direction (Z-direction) of fluid pressure pulse excitation, combination of stimulation response is single
3.56 times of high-pressure fluid source exciter response are 1.27 times of single vibrational excitation structural vibration exciter response.In the Y direction, it flows
Combination of stimulation response is 1.13 (6.540 and 6.350) times of off-resonance combination of stimulation response when body pressure fluctuation is resonated, relatively
When 1 frequency of vibrational excitation structure is first order resonance frequency, be affected (1.03 changes of the fluid pressure pulse frequency to array response
For 1.13), referring to shown in table three:
Table three: pressure 21MPa, amplitude 5%, off-resonance place an order excitation and the comparison of combination of stimulation acceleration responsive counts
Table
3, Figure 14 and Figure 15, shown referring to Fig.1, when the frequency of vibrational excitation structure is second-order resonance frequency, combination of stimulation
Response is 37.97 times of single high-pressure fluid source response, is 1.49 times of the response of single vibrational excitation structure.In vibrational excitation structure
Master drive direction (Y-direction) on, single vibrational excitation response is changed to because of the variation of the frequency of vibrational excitation structure by 5.22G
0.625G is changed to 10.94G, and first order resonant response is 8.352 times of non-resonance response, and second-order resonance response is off-resonance
17.504 times, under different natural frequencies, the vibration shape of developmental tube 4 is different, and the corresponding response under same observation station is also different.
Referring to shown in table four: combination of stimulation acceleration responsive with vibrational excitation structure frequency influence, because of vibrational excitation knot
The variation of combination of stimulation acceleration responsive caused by the vibrational excitation frequency of structure changes, is changed to 0.718G by 6.54G and is changed to
16.289G, the response of combination of stimulation first order resonant are 9.11 times of off-resonance, and second-order resonance response is 22.69 times of off-resonance,
The variation of the frequency of vibrational excitation structure is affected to the influence that combination of stimulation responds than single vibrational excitation response.
Table four: pressure 21MPa, amplitude 5%, second-order resonance place an order excitation and combination of stimulation acceleration responsive comparison unite
Count table
It is the response contrast test to strain below.
Strain outside contrasting surfaces inner face is it is found that internal strain opposite face external strain in face is much smaller.By single high-pressure fluid source forcing
Caused by respond, face external strain be 7.74 (in faces 11.237 with face outer 87.005) of face internal strain again；The sound of single vibrational excitation
It answers, face external strain is 10.49 times of face internal strain；It is responded caused by combination of stimulation, face external strain is the 10.16 of face internal strain
(1430.179 and in face 140.805 outside face) times.For the external strain of face, face internal strain can be ignored, using answering outside face
Become and carries out law study.
Referring to Fig.1 shown in 6 and Figure 17, the data of comparison 5% resonance and 5% off-resonance, single fluid pressure fluctuation excitation
Response by 87.005 is changed to 6.05, is 14.38 times under non-resonant behavior under fluid resonant state, the response of combination of stimulation because
The variation of fluid pressure pulse frequency, face external strain are changed to 1410.881 by 1430.179, and off-resonance strain facies is for resonance
1.35% is reduced when state, the variation of fluid pressure pulse frequency has a significant impact to combination of stimulation response strain, referring to table
Shown in five:
Table five: singly excitation and combination of stimulation strain-responsive compare statistical form when pressure 21MPa, amplitude are 5%
Referring to Fig.1 shown in 8 and Figure 19, the strain of combination of stimulation should become larger than what is singly motivated, with the data under first order resonant
For, the response of the more single vibrational excitation structure of combination of stimulation strain-responsive increases 19.5%, more single high-pressure fluid source forcing
Strain-responsive increases 1544%.
Referring to shown in table six: fluid pulsation frequency changes the impact analysis to combination of stimulation strain-responsive: working as vibrational excitation
When the frequency of structure is non-resonant behavior, the response of combination of stimulation is changed to because of the variation of fluid pulsation frequency by 77.869
56.795,27.1% is reduced compared with the strain under resonance state when off-resonance；When the frequency of vibrational excitation structure is second-order resonance shape
When state, combination of stimulation response is changed to 385.364 by 400.362, and the relatively resonance of fluid non-resonant behavior reduces by 3.75%.Vibration swashs
When encouraging the vibrational excitation frequency difference of structure, the influence degree that the variation of fluid pulsation frequency responds combination of stimulation is not also identical.
The influence for changing the frequency of vibrational excitation structure to combination of stimulation strain-responsive is analyzed, with vibrational excitation
The variation of the frequency of structure, the strain of the vibrational excitation of single vibrational excitation structure are changed to 48.532 by 1196.825 and are changed to
392.175, first order resonant strain is 24.66 times of non-resonant behavior, and second-order resonance strain is 8.08 times of off-resonance strain,
Due to the difference of the vibration shape, cause its response also different.For the strain-responsive of combination of stimulation, because of vibrational excitation structure frequency
Variation cause strain to be changed to 77.869 by 1430.179 to be changed to 400.362, first order resonant strain is non-resonant behavior
18.37 times, second-order resonance strain is 5.14 times of off-resonance strain, and the frequency variation of vibrational excitation structure strains combination of stimulation
The influence of the vibrational excitation strain-responsive of the more single vibrational excitation structure of influence of response is lower.
Table six: singly excitation and combination of stimulation strain-responsive compare statistical form when pressure 21MPa, amplitude are 5%
Developmental tube 4 is under the vibrational excitation of single vibrational excitation structure 1, in variation, that is, developmental tube 4 of 4 state of developmental tube
, quality increases, pressure increases, and the trend of reduction is presented in the response under each frequency, and wherein mass change is to 4 sound of developmental tube
It should influence more apparent.Acceleration responsive under first order resonant reduces by 21.64%, strain reduces by 24.19% because of the influence of quality.
Under single fluid pressure fluctuation excitation, response increases with the increase of pressure rating and fluid pressure pulse amplitude.
In addition, the experimental results showed that, under first order resonant, fluid pressure pulse excitation under acceleration responsive than vibrational excitation structure vibration
The lower response of dynamic excitation is small by 87.15%, and strain-responsive is small by 87.71%；Under non-resonant behavior, the acceleration of fluid pressure pulse excitation
Degree response ratio vibrational excitation structure acceleration response is small by 77.12%, and strain-responsive is small by 55.23%.
Fluid structurecoupling under two source combination of stimulation responds changing rule: to pulsation amplitude, frequency, the pressure of two kinds of source forcings
Power system etc. is combined, and shares 36 kinds of operating conditions, compared the fluid structurecoupling response between different operating conditions.First order resonant situation
Under, it is 1.23 times or more of single external vibration excitation that the fluid structurecoupling response ratio list exciter response under combination of stimulation is much larger,
It is 9.54 times or more of single high-pressure fluid source pressure fluctuation excitation.
Since the response of the fluid structurecoupling response ratio vibrational excitation structure of fluid pressure pulse is much smaller, under resonance state,
The response of the response ratio vibrational excitation structure of fluid pressure pulse is small by 87% or more；And in the response of combination of stimulation, fluid pressure
Power impulse excitation accounts for 7.53%, and external vibration excitation accounts for 92.47%, therefore combination of stimulation is motivated relative to single fluid pressure fluctuation
Fluid structurecoupling response, fluid pressure pulse frequency, amplitude, pressure variation on the response of the fluid structurecoupling of combination of stimulation influence compared with
It is small.
Under first order resonant, with the increase of pulsation amplitude, pressure oscillation in developmental tube 4 is caused to increase, combination of stimulation response
Increase；As fluctuation pressure system increases, 4 rigidity of developmental tube is added somewhat to, fluid structurecoupling response is gradually reduced.
It is same that exciter response variation tendency is combined under second-order resonance frequency.
Above-mentioned described feature, structure or characteristic can be incorporated in one or more embodiment party in any suitable manner
In formula, if possible, it is characterized in discussed in each embodiment interchangeable.In the above description, it provides many specific thin
Section fully understands embodiments of the present invention to provide.It will be appreciated, however, by one skilled in the art that this can be practiced
The technical solution of invention, or can be using other methods, component, material without one or more in the specific detail
Material etc..In other cases, known features, material or operation are not shown in detail or describe to avoid each side of the invention is obscured
Face.
The term of " about " " about " is used to be generally represented within the 20% of a given value or range in this specification, preferably
It is within 10%, and is more preferably within 5%.Given quantity is quantity about herein, implies that the feelings in not certain illustrated
Under condition, " about " " about " " substantially " meaning of " general " can be still implied.
Although the term of relativity, such as "upper" "lower" is used to describe a component of icon for another in this specification
The relativeness of one component, but these terms are in this manual merely for convenient, for example, with reference to the accompanying drawings described in show
The direction of example.It is appreciated that, if making it turn upside down the device overturning of icon, the component described in "upper" will
As the component in "lower".Term of other relativities, such as "high" " low " "top" "bottom" " preceding " " rear " " left side " " right side " etc. are also made
With similar meaning.When certain structure is at other structures "upper", it is possible to refer to that certain structural integrity is formed in other structures, or
Refer to that certain structure is " direct " to be arranged in other structures, or refers to that certain structure is arranged in other structures by the way that another structure is " indirect ".
In this specification, term "one", " one ", "the", " described " and "at least one" indicating there are one or
Multiple element/component parts/etc.；Term "comprising", " comprising " and " having " are to indicate the open meaning being included
And refer to the element in addition to listing/component part/also may be present other than waiting other element/component part/etc.；Term " the
One ", " second " and " third " etc. only use as label, are not the quantity limitations to its object.
It should be appreciated that the present invention is not limited in its application to the detailed construction and arrangement of the component of this specification proposition
Mode.The present invention can have other embodiments, and can realize and execute in many ways.Aforesaid deformation form and
Modification is fallen within the scope of the present invention.It should be appreciated that this disclosure and the present invention of restriction extend in text
And/or it is mentioned in attached drawing or all alternative combinations of two or more apparent independent features.It is all these different
Combination constitutes multiple alternative aspects of the invention.Embodiment described in this specification illustrates to become known for realizing the present invention
Best mode, and will enable those skilled in the art using the present invention.
Claims (10)
1. a kind of aircraft pipeline solid liquid interation test device under multi-source excitation, tests developmental tube, the examination
Testing pipe is bending tube, has first end, second end and at least one bending part, which is characterized in that the aircraft pipeline exists
Solid liquid interation test device includes: under multi-source motivates
Vibrational excitation structure, for providing vibrational excitation；
Fixed structure, is installed on the vibrational excitation structure, and the fixed structure is capable of fixing the developmental tube；
Fluid pressure pulse incentive structure is connect, for applying pressure fluctuation with the first end of the developmental tube；
Detection structure is set to the developmental tube, needs measurement parameter for measure the developmental tube；
Enclosed construction, set on the second end of the developmental tube, so that the second end is closed.
2. aircraft pipeline according to claim 1 solid liquid interation test device, feature under multi-source excitation exist
In aircraft pipeline solid liquid interation test device under multi-source excitation further include:
Manifold, is installed on the fixed structure, and the manifold has an entrance and a multiple outlets, and the entrance and it is described go out
Mouth rounding off connection, the fluid pressure pulse incentive structure are connected to the entrance, the first end of multiple developmental tubes
It is connected to the outlet correspondingly.
3. aircraft pipeline according to claim 2 solid liquid interation test device, feature under multi-source excitation exist
In the centerline axis parallel of the central axis of the entrance and the outlet is arranged.
4. aircraft pipeline according to claim 2 solid liquid interation test device, feature under multi-source excitation exist
In the central axis of the outlet is vertical with the direction of excitation of the vibrational excitation structure.
5. aircraft pipeline according to claim 2 solid liquid interation test device, feature under multi-source excitation exist
In aircraft pipeline solid liquid interation test device under multi-source excitation further include:
Hose is connected, is connected between the fluid pressure pulse incentive structure and the entrance of the manifold.
6. aircraft pipeline according to claim 1 solid liquid interation test device, feature under multi-source excitation exist
In the fluid pressure pulse incentive structure is capable of providing the high-pressure fluid source that maximum pressure is more than or equal to 35Mpa.
7. aircraft pipeline according to claim 1 solid liquid interation test device, feature under multi-source excitation exist
In the vibrational excitation structure is the shake table that maximum exciting force is less than or equal to 100KN.
8. aircraft pipeline according to claim 1 solid liquid interation test device, feature under multi-source excitation exist
In the detection structure includes:
Strain transducer, set on the outer wall of the first end of the developmental tube；
Acceleration transducer, between the second end and the bending part of the developmental tube or the institute of the developmental tube
It states between second end and the bending part between two neighboring bending part.
9. aircraft pipeline according to claim 7 solid liquid interation test device, feature under multi-source excitation exist
In the detection structure further include:
Displacement sensor, between the second end and the bending part of the developmental tube or the developmental tube it is described
Between second end and the bending part between two neighboring bending part.
10. aircraft pipeline according to claim 1 solid liquid interation test device, feature under multi-source excitation exist
In the enclosed construction includes pressure sensor.
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| CN110245431A (en) * | 2019-06-18 | 2019-09-17 | 西北工业大学 | The source tracing method of aircraft hydraulic pipeline solid liquid interation fracture defect |
| CN112525461A (en) * | 2020-07-06 | 2021-03-19 | 东北大学 | Vibration test bed of multiform clamp pipe test system and frequency response test method thereof |
| CN112985759A (en) * | 2021-02-09 | 2021-06-18 | 北京工业大学 | Fluid-solid coupling experiment platform based on influence of flow velocity on cantilever flow transmission pipe |
| CN113148231A (en) * | 2021-05-14 | 2021-07-23 | 北京宇航系统工程研究所 | Catheter dynamic strength modular structure based on staggered frequency design |
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| CN112985759A (en) * | 2021-02-09 | 2021-06-18 | 北京工业大学 | Fluid-solid coupling experiment platform based on influence of flow velocity on cantilever flow transmission pipe |
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