CN108593229B - Integral impeller blade vibration measurement device and measurement method - Google Patents
Integral impeller blade vibration measurement device and measurement method Download PDFInfo
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- CN108593229B CN108593229B CN201810253565.9A CN201810253565A CN108593229B CN 108593229 B CN108593229 B CN 108593229B CN 201810253565 A CN201810253565 A CN 201810253565A CN 108593229 B CN108593229 B CN 108593229B
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- G—PHYSICS
- G01—MEASURING; TESTING
- 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
Abstract
The present invention provides a kind of Integral impeller blade vibration measurement device and measurement methods, include experimental stand and impeller assembly, and impeller assembly is mounted on experimental stand；The impeller assembly includes integral wheel (2), piezoelectric patches excitation system, data storage device and data acquisition equipment；Piezoelectric patches excitation system includes piezoelectric patches (6), and the piezoelectric patches (6) and data acquisition equipment are installed on integral wheel (2)；Data acquisition equipment is connected on data storage device.The present invention also provides a kind of Integral impeller blade vibration measurement methods using above-mentioned Integral impeller blade vibration measurement device.Measuring device provided by the invention can make tested integral wheel by generation vibration under the Engine Excitation of required order, and obtain the vibration data of blade, can be used for the effect forecast of blade oscillation measurement, blade vibration impedance bundary measure.
Description
Technical field
The present invention relates to vibration damping fields, and in particular, to a kind of Integral impeller blade vibration measurement device and measurement method.
Background technique
The ratio that stress fracture failure caused by high cycle fatigue accounts for engine failure occurs as flow-induced vibration for engine blade
Example up to 40%.To save oil consumption, development trend is that integral wheel (also referred to as integral blade disc) or whole leaf joint skill is widely used
Art.Integral wheel structure is by blade and wheel disc be cast or the machinings mode such as forging is made of one, or by ready-made list
A blade is welded to wheel disc outer rim with electron beam welding and forms one.Although integral wheel loss of weight may be up to 25~40%, knot
Structure damping ratio drops to 0.01% magnitude, while conventional frictions impedance bundary technology is no longer feasible between some convex shoulders, leaf etc..For
Reduce and the risk that flow-induced vibration unstability causes the stress excessive occurs, it usually needs integral wheel is carried out at dry-friction damping
Reason.In order to effectively forecast to the effect of dry-friction damping processing, needing to establish integral wheel, (processing containing frictional damping is arranged
Apply) vibration-testing apparatus of blade.The vibration of blade is surveyed in integral wheel and traditional blades and the impeller of wheel disc split design
Examination, the forecast of impedance bundary effect have marked difference.In integral wheel, blade is no longer the tenon by rotor blade one by one
Head, which is mounted in the tongue-and-groove of wheel disc, to link together, and impedance bundary measure, which is also not, carries out frictional damping between two blades
Processing, therefore one or more blades can not be taken out and tested, it is necessary to it is tested for entire integral wheel；It rubs simultaneously
The centrifugal force that the performance of impedance bundary measure effect is generated dependent on the rotation of impeller, therefore also must be considered that integral wheel high speed
Revolving speed when rotation.Measurement measure at present for blade vibratory response in integral wheel under rotation status is few.It is primarily present
Difficult point be: first is that the influence of high speed rotation revolving speed, revolving speed height causes to increase to the requirements such as misaligning；Second is that Airflow Exciting-Vibration Force
Influence it is more difficult how reliably to apply each rank exciting force especially under rotation status；Third is that the influence of data acquisition, special
It is not under high speed rotation, acquisition instrument is set as why not influenced the rotation imbalance amount of aerodynamics and integral wheel, storing
It is standby how to be stored.
Summary of the invention
For the defects in the prior art, the object of the present invention is to provide a kind of Integral impeller blade vibration measurement device with
Measurement method.
The Integral impeller blade vibration measurement device provided according to the present invention includes experimental stand and impeller assembly, impeller
Component is mounted on experimental stand；
The impeller assembly includes integral wheel, piezoelectric patches excitation system, data storage device and data acquisition equipment；
Piezoelectric patches excitation system includes piezoelectric patches, and the piezoelectric patches and data acquisition equipment are installed on integral wheel；
Data acquisition equipment is connected on data storage device.
Preferably, the piezoelectric patches excitation system also includes control device and piezoelectric patches vibration excitor control switch；Control dress
It sets, piezoelectric patches vibration excitor control switch, piezoelectric patches are sequentially connected；
Multiple piezoelectric patches are along the spoke that integral wheel circumferential direction is fixedly mounted on integral wheel.
Preferably, spoke along piezoelectric patches excitation system generate simulation flow-induced vibration flow direction on upstream face with
Piezoelectric patches is provided on downstream face, the piezoelectric patches on piezoelectric patches and downstream face on upstream face is deposited in spoke circumferential direction
It is poor in setting angle；
The control device is mounted on the center of integral wheel.
Preferably, the data acquisition equipment includes the acceleration transducer being mounted on the blade of integral wheel and strain
Piece sensor；
Data acquisition equipment is evenly arranged in impeller circumferential direction.
Preferably, the experimental stand includes the transmission shaft being fastenedly connected and installation disk；
The integral wheel, control device and piezoelectric patches vibration excitor control switch are installed on installation disk.
Preferably, the data storage device includes the on-line storage electronic box being arranged on installation disc centre position；
The on-line storage electronic box includes timer, RAM card, USB interface and A/D conversion module.
Preferably, the transmission shaft is the Hollow Transmission Shafts with axially extending bore；
Wherein one end in the both ends of Hollow Transmission Shafts in axial direction is connected with installation disk, and cunning is equipped on the other end
Ring, the data signal line connected on data acquisition equipment are connected after passing through the axially extending bore in Hollow Transmission Shafts with slip ring；
Data storage device is connected with the slip ring.
Preferably, experimental stand also includes motor and bracket；
Motor is connected with Hollow Transmission Shafts, and Hollow Transmission Shafts are rack-mount by the bearing of setting；
Encoder is additionally provided on the other end of the Hollow Transmission Shafts in axial direction.
It preferably, also include vacuum chamber, internal vacuum chamber forms accommodation space, and the installation disk is all provided with integral wheel
It sets in accommodation space；
Hollow Transmission Shafts are justified from the spatially extended rear and installation in vacuum chamber arrival accommodation space except accommodation space
Disk is connected；
It is connected between Hollow Transmission Shafts and vacuum chamber by rotating seal；Be additionally provided on the vacuum chamber vacuum pump with
Vacuometer.
The present invention also provides a kind of Integral impeller blades using above-mentioned Integral impeller blade vibration measurement device to shake
Dynamic measurement method comprising the steps of:
Vacuum drawn step: opening vacuum pump, after the vacuum degree in accommodation space reaches setting value, closes vacuum pump；
Simulation flow-induced vibration forming steps: enabling control device apply the level of setting to piezoelectric patches vibration excitor control switch,
Control the voltage in piezoelectric patches；
Data acquisition step: opening motor, and data acquisition equipment is enabled to acquire blade vibration data；
Data storing steps: data storage device is enabled to store blade vibration data.
Compared with prior art, the present invention have it is following the utility model has the advantages that
1, measuring device provided by the invention can make to produce under tested Engine Excitation of the integral wheel by required order
Raw vibration, and the vibration data of blade is obtained, it is pre- to can be used for blade oscillation measurement, the effect of blade vibration impedance bundary measure
Report.
2, the present invention, which solves existing paddle response vibration-testing, cannot be considered in terms of excitation simulation, response test under high speed rotation
The technical issues of.
3, the on-line storage module arrangement in the present invention is in wheel disk center, when data storage is to certain capacity, in taking-up
Card is deposited, off-line data processing is carried out；The acceleration transducer of blade surface and the cabling of strain-ga(u)ge transducer are along blade simultaneously
Surface is symmetrical, reduces the influence that performance is misaligned to high speed rotational blade.
4, the configuration of the present invention is simple is reasonable, reliable for operation.
Detailed description of the invention
Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other feature of the invention,
Objects and advantages will become more apparent upon:
Fig. 1 is Integral impeller blade vibration measurement device structural schematic diagram provided by the invention；
Fig. 2 is piezoelectric patches excitation system and data acquisition equipment schematic view of the mounting position；
Fig. 3 is the excitation for 0,1,2,4 orders that piezoelectric patches excitation system is eradicated.
It is shown in figure:
Specific embodiment
The present invention is described in detail combined with specific embodiments below.Following embodiment will be helpful to the technology of this field
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill of this field
For personnel, without departing from the inventive concept of the premise, various modifications and improvements can be made.These belong to the present invention
Protection scope.
In the description of the present invention, it is to be understood that, term " on ", "lower", "front", "rear", "left", "right", " perpendicular
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "top", "bottom", "inner", "outside" is orientation based on the figure or position
Relationship is set, is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning are necessary
It with specific orientation, is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.
Integral impeller blade vibration measurement device provided by the invention includes experimental stand and impeller assembly, impeller assembly
It is mounted on experimental stand.The impeller assembly includes integral wheel 2, piezoelectric patches excitation system, data storage device and number
According to acquisition equipment, piezoelectric patches excitation system includes piezoelectric patches 6, and the piezoelectric patches 6 is installed in whole leaf with data acquisition equipment
On wheel 2, data acquisition equipment is connected on data storage device.The data acquisition equipment includes to be mounted on integral wheel 2
Acceleration transducer 7 and strain-ga(u)ge transducer 8 on blade, data acquisition equipment are evenly arranged in impeller circumferential direction, phase
Ying Di, the cabling of data acquisition equipment be also it is symmetrical along blade surface, misalign performance to reduce high speed rotational blade
Influence.Preferably, the data acquisition equipment is fixed on blade by way of stickup.
The piezoelectric patches excitation system also includes control device 4 and piezoelectric patches vibration excitor control switch 5；Control device 4, pressure
Electric piece vibration excitor control switch 5, piezoelectric patches 6 are sequentially connected, and multiple piezoelectric patches 6 are fixedly mounted on along 2 circumferential direction of integral wheel
On the spoke of integral wheel 2.Upstream of the spoke on the flow direction of the simulation flow-induced vibration generated along piezoelectric patches excitation system
It is provided with piezoelectric patches 6 on face and downstream face, the piezoelectric patches 6 on upstream face and the piezoelectric patches 6 on downstream face are along spoke circumferential direction
It is poor that there are setting angles on direction.Preferably, piezoelectric patches 6 is pasted on spoke by insulation and silver-colored conductive epoxy adhesives.It is excellent
Selection of land, the control device 4 are mounted on the center of integral wheel 2, to reduce the shadow that high speed rotational blade misaligns performance
It rings.
The experimental stand includes the transmission shaft that is fastenedly connected and installation disk 3, the integral wheel 2, control device 4 with
And piezoelectric patches vibration excitor control switch 5 is installed on installation disk 3.In embodiment, the transmission shaft is with axially extending bore
Hollow Transmission Shafts 9, wherein one end in the both ends of Hollow Transmission Shafts in axial direction is connected with installation disk 3, on the other end
Slip ring 13 is installed, the data signal line connected on data acquisition equipment pass through after the axially extending bore in Hollow Transmission Shafts 9 with cunning
Ring 13 is connected, and data storage device is connected with the slip ring 13, and the blade vibration data that such data acquisition equipment acquires can be with
It is transmitted in data storage device by slip ring 13 in real time.In change case, the data storage device includes to be arranged in installation circle
On-line storage electronic box on 3 center of disk, the on-line storage electronic box include timer, RAM card, USB interface and
A/D conversion module takes out RAM card, carries out off-line data processing when data storage is to certain capacity.On-line storage electronic box
The influence that installation 3 center of disk misaligns performance also for reduction to high speed rotational blade is set.
Experimental stand also includes motor 11 and bracket, and motor 11 is connected with Hollow Transmission Shafts 9, and Hollow Transmission Shafts 9 are by setting
The bearing 10 set is rack-mount, is additionally provided with encoder 12 on the other end of the Hollow Transmission Shafts 9 in axial direction.Separately
Outside, measuring device provided by the invention also includes vacuum chamber 1, forms accommodation space inside vacuum chamber 1, the installation disk 3 with
Integral wheel 2 is arranged in accommodation space.Hollow Transmission Shafts 9 from except accommodation space it is spatially extended through vacuum chamber 1 to
It is connected after in up to accommodation space with installation disk 3, is connected between Hollow Transmission Shafts 9 and vacuum chamber 1 by rotating seal 15.Institute
It states and is additionally provided with vacuum pump 14 and vacuometer 16 on vacuum chamber 1.Preferably, the vacuum chamber 1, can also set on experimental stand
The measuring devices such as pressure thermometer, the tachometer of monitoring are set, the signal that these measuring devices generate can also be transmitted to data
It is stored in storage equipment.
The present invention also provides a kind of Integral impeller blades using above-mentioned Integral impeller blade vibration measurement device to shake
Dynamic measurement method comprising the steps of: vacuum drawn step: vacuum pump 14 is opened, is set when the vacuum degree in accommodation space reaches
After definite value, vacuum pump 14 is closed；Simulation flow-induced vibration forming steps: control device 4 is enabled to apply to piezoelectric patches vibration excitor control switch 5
Fixed level is added, the voltage in piezoelectric patches 6 is controlled；Data acquisition step: opening motor 11, and data acquisition equipment is enabled to acquire leaf
Piece vibration data；Data storing steps: data storage device is enabled to store blade vibration data.
Preferred embodiment:
Integral impeller blade vibration measurement device structure is as shown in Figure 1 under rotation status of the invention.Vacuum chamber 1 provides
The vacuum environment of Integral impeller blade vibration-testing can effectively eliminate the influence of aerodynamics, and vacuum chamber 1 is preferably with height
The transparent material of intensity carries out processing and fabricating, while in order to guarantee air-tightness, needing be bolted between the seam of vacuum chamber
On the basis of carry out the processing of glue envelope；The seam crossings such as Hollow Transmission Shafts 9 and slip ring 13 are also required to be sealed processing.In vacuum pump 14
Under the action of, the air in vacuum chamber 1 is extracted, and the vacuum degree in vacuum chamber 1 is monitored by vacuometer 16, when reaching
After required vacuum degree, vacuum pump 14 stops working, and at this time can start to measure work, namely the vacuum in blade vibration test
Pump 14 necessarily is in closed state.Pressure in vacuum chamber 1 maintains 20mbar or so by two-stage vane pump, rather than minimum
1mbar, this be in order to piezoelectric patches 6 optimum performance play.
Integral wheel 2 is loaded into the end that Hollow Transmission Shafts 9 are located in vacuum chamber 1 by installing disk 3, installs disk 3
The attachment device that integral wheel 2 is installed in practical steam turbine should be simulated as far as possible；The other end of Hollow Transmission Shafts 9 connects motor
11,11 high speed rotation of motor provides power, drives 2 high speed rotation of integral wheel by Hollow Transmission Shafts 9.Hollow Transmission Shafts 9 are logical
2 groups of bearings 10 for crossing left and right ends are supported.Since Hollow Transmission Shafts 9 need to adopt across an end face of vacuum chamber 1
The leakproofness of vacuum chamber 1 is not had an impact with the guarantee of rotating seal 15.In addition, cabling is needed in Hollow Transmission Shafts 9, including
The supply lines of piezoelectric patches 6, the control line of control device 4, the cable of encoder 12, the cabling of acceleration transducer 7 and strain
The cabling of piece sensor 8.In order to realize the transmitting of data between sound component, in the end connection slip ring 13 of Hollow Transmission Shafts 9.
As shown in Fig. 2, the piezoelectric patches 6 in piezoelectric patches excitation system is by insulating with silver-colored conductive epoxy adhesives circumferentially
It is pasted on the spoke of integral wheel, arranges N number of piezoelectric patches on the incoming flow upstream and downstream two sides of spoke.4 cloth of control device
It sets at the center of installation disk 3, reduces to the greatest extent to misaligning and the influence of amount of unbalance.Piezoelectric patches vibration excitor control switch 5 is right
Claim to be arranged on the circle of circumference one of installation disk 3.Piezoelectric patches works in d31Mode.Control device 4 is controlled to piezoelectric patches vibration excitor
Switch 5 applies the voltage in corresponding level control piezoelectric patches, controls the phase of piezoelectric patches exciting force to rank needed for realization
Secondary excitation；There are certain differential seat angles between two groups of piezoelectric patches 6 of upstream and downstream simultaneously, and are given respectively by control device 4
Sinusoidal and cosine mode voltage analog wave-passage excitation out.As shown in figure 3, by taking N=60 piezoelectric patches 6 as an example, when each piezoelectricity
The phase of piece after rationally controlling, may be implemented 0 rank, 1 rank, 2 ranks, 4 rank exciting forces (corresponding pitch diameter is respectively 0,1,2,4,
Other each rank exciting forces can similarly obtain), due to the coupling between rim section and blade, piezoelectric patches 6 can be provided
The exciting force of each order is applied on blade.
As shown in Fig. 2, the acceleration transducer 7 for the small size high sensitivity that the blade surface of integral wheel 2 is pasted and small
The data that the strain-ga(u)ge transducer 8 of size high sensitivity can respond blade vibration are acquired, in stickup and arrangement, leaf
The acceleration transducer 7 on piece surface and the cabling of strain-ga(u)ge transducer 8 are first symmetrical along blade surface, to reduce to high speed
Rotating vane misaligns the influence of performance.
A kind of embodiment of data storage device be by be arranged in installation 3 center of disk on-line storage electronic box into
Row storage, on-line storage electronic box includes timer, RAM card, USB interface, A/D conversion module.On-line storage electronic box arrangement
At installation 3 center of disk, to reduce the influence for misaligning performance to high speed rotational blade.When data storage is to certain capacity,
RAM card is taken out, off-line data processing is carried out.
The another embodiment of data storage device is the acceleration transducer 7 and strain-ga(u)ge transducer blade surface
The signal wire of 8 acquisition data is connected to the moved end of slip ring 13 by Hollow Transmission Shafts 9, and the other end of slip ring 13 passes data in real time
Pass data storage device.The pressure thermometer of monitoring, tacho signal are stored also by this mode.
Specific embodiments of the present invention are described above.It is to be appreciated that the invention is not limited to above-mentioned
Particular implementation, those skilled in the art can make various deformations or amendments within the scope of the claims, this not shadow
Ring substantive content of the invention.In the absence of conflict, the feature in embodiments herein and embodiment can any phase
Mutually combination.
Claims (8)
1. a kind of Integral impeller blade vibration measurement device, which is characterized in that include experimental stand and impeller assembly, impeller assembly
It is mounted on experimental stand；
The impeller assembly includes integral wheel (2), piezoelectric patches excitation system, data storage device and data acquisition equipment；
Piezoelectric patches excitation system includes piezoelectric patches (6), and the piezoelectric patches (6) and data acquisition equipment are installed on integral wheel (2)；
Data acquisition equipment is connected on data storage device；
The piezoelectric patches excitation system also includes control device (4) and piezoelectric patches vibration excitor control switch (5)；Control device (4),
Piezoelectric patches vibration excitor control switch (5), piezoelectric patches (6) are sequentially connected；
Multiple piezoelectric patches (6) are fixedly mounted on the spoke of integral wheel (2) along integral wheel (2) circumferential direction；
Spoke is equal on the upstream face and downstream face on the flow direction of the simulation flow-induced vibration generated along piezoelectric patches excitation system
It is provided with piezoelectric patches (6), the piezoelectric patches (6) on upstream face is deposited with the piezoelectric patches (6) on downstream face in spoke circumferential direction
It is poor in setting angle；
The control device (4) is mounted on the center of integral wheel (2).
2. Integral impeller blade vibration measurement device according to claim 1, which is characterized in that the data acquisition equipment
Acceleration transducer (7) and strain-ga(u)ge transducer (8) on blade comprising being mounted on integral wheel (2)；
Data acquisition equipment is evenly arranged in impeller circumferential direction.
3. Integral impeller blade vibration measurement device according to claim 1, which is characterized in that the experimental stand includes
The transmission shaft being fastenedly connected and installation disk (3)；
The integral wheel (2), control device (4) and piezoelectric patches vibration excitor control switch (5) are installed in installation disk (3)
On.
4. Integral impeller blade vibration measurement device according to claim 3, which is characterized in that the data storage device
Include the on-line storage electronic box being arranged on installation disk (3) center；
The on-line storage electronic box includes timer, RAM card, USB interface and A/D conversion module.
5. Integral impeller blade vibration measurement device according to claim 3, which is characterized in that the transmission shaft be with
The Hollow Transmission Shafts (9) of axially extending bore；
Wherein one end in the both ends of Hollow Transmission Shafts in axial direction is connected with installation disk (3), and cunning is equipped on the other end
Ring (13), the data signal line connected on data acquisition equipment pass through after the axially extending bore in Hollow Transmission Shafts (9) with slip ring
(13) it is connected；
Data storage device is connected with the slip ring (13).
6. Integral impeller blade vibration measurement device according to claim 5, which is characterized in that experimental stand also includes electricity
Machine (11) and bracket；
Motor (11) is connected with Hollow Transmission Shafts (9), and Hollow Transmission Shafts (9) are rack-mount by the bearing (10) of setting；
Encoder (12) are additionally provided on the other end of the Hollow Transmission Shafts (9) in axial direction.
7. Integral impeller blade vibration measurement device according to claim 6, which is characterized in that also include vacuum chamber (1),
Accommodation space is formed inside vacuum chamber (1), the installation disk (3) and integral wheel (2) are arranged in accommodation space；
Hollow Transmission Shafts (9) reach rear in accommodation space and installation from spatially extended run through vacuum chamber (1) except accommodation space
Disk (3) is connected；
It is connect between Hollow Transmission Shafts (9) and vacuum chamber (1) by rotating seal (15)；It is also set up on the vacuum chamber (1)
There are vacuum pump (14) and vacuometer (16).
8. a kind of integral wheel leaf using Integral impeller blade vibration measurement device described in any one of any one of claims 1 to 77
Piece vibration measurement method, which is characterized in that comprise the steps of:
Vacuum drawn step: opening vacuum pump (14), after the vacuum degree in accommodation space reaches setting value, closes vacuum pump
(14)；
Simulation flow-induced vibration forming steps: control device (4) are enabled to apply the electricity of setting to piezoelectric patches vibration excitor control switch (5)
Flat, in control piezoelectric patches (6) voltage；
Data acquisition step: opening motor (11), and data acquisition equipment is enabled to acquire blade vibration data；
Data storing steps: data storage device is enabled to store blade vibration data.
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| CN109580071B (en) * | 2018-11-29 | 2020-01-21 | 浙江大学 | Method for measuring excitation force of rotary driving shaft and excitation force of impeller |
| CN109612663B (en) * | 2019-01-08 | 2021-01-05 | 大连交通大学 | Rotary high-frequency alternating airflow excitation test device |
| CN109506867B (en) * | 2019-01-08 | 2021-01-05 | 大连交通大学 | Air flow-heat engine coupling excitation test device |
| CN111350675B (en) * | 2020-03-10 | 2021-02-19 | 中国农业大学 | Quantitative measurement system for hydraulic damping ratio of rotary centrifugal impeller |
| CN113309710B (en) * | 2021-05-25 | 2022-11-01 | 清华大学 | Measuring device and measuring method for underwater mode of rotary impeller machine |
| CN115435734B (en) * | 2021-06-01 | 2024-04-16 | 上海交通大学 | Calibrating device and method of blade tip timing measurement system |
| CN113959664A (en) * | 2021-11-19 | 2022-01-21 | 华能国际电力股份有限公司 | Blade dynamic frequency remote measuring device using piezoelectric sheet |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| GB2217391A (en) * | 1988-04-11 | 1989-10-25 | Inst Mash Akademii Nauk Uk Ssr | Apparatus for testing fan blades for vibration survival strength |
| JP3950238B2 (en) * | 1998-09-24 | 2007-07-25 | 三菱重工業株式会社 | Vibration mode excitation device for rotational vibration test |
| CN102142790B (en) * | 2011-04-14 | 2013-11-06 | 天津大学 | Method for exciting rotary ultrasonic motor |
| CN103196644B (en) * | 2013-04-09 | 2015-10-21 | 中国航空动力机械研究所 | integral impeller blade vibration fatigue test device and test method |
| CN103528782B (en) * | 2013-10-23 | 2015-11-04 | 东北大学 | Based on thin-walled workpiece vibration-testing apparatus and the method for piezoelectric actuator |
| CN105258886B (en) * | 2015-10-22 | 2017-11-14 | 西安热工研究院有限公司 | A kind of electromagnetism harmonic wave exciting device of high-speed rotating impeller |
| CN107063612B (en) * | 2017-04-18 | 2019-06-25 | 东北大学 | A kind of integral blade disk kinematic similarity is test bed |
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