CN108760540A - Blade fatigue experimental device is carried based on resonance method high frequency heat - Google Patents
Blade fatigue experimental device is carried based on resonance method high frequency heat Download PDFInfo
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- CN108760540A CN108760540A CN201810830816.5A CN201810830816A CN108760540A CN 108760540 A CN108760540 A CN 108760540A CN 201810830816 A CN201810830816 A CN 201810830816A CN 108760540 A CN108760540 A CN 108760540A
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- blade
- temperature
- control circuit
- shake table
- heating
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- 238000009774 resonance method Methods 0.000 title claims abstract description 10
- 238000010438 heat treatment Methods 0.000 claims abstract description 24
- 238000005096 rolling process Methods 0.000 claims abstract description 9
- 238000001514 detection method Methods 0.000 claims description 23
- 238000001816 cooling Methods 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 10
- 239000011888 foil Substances 0.000 claims description 7
- 230000001133 acceleration Effects 0.000 claims description 6
- 238000009661 fatigue test Methods 0.000 claims description 5
- 230000005856 abnormality Effects 0.000 claims description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000005485 electric heating Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010358 mechanical oscillation Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The present invention provides one kind carrying blade fatigue experimental device, including shake table, two support beams, two bearings, two rolling bearings, two installs fixtures, two heating components based on resonance method high frequency heat；Shake table is located among two support beams, blade is centrally disposed on shake table, straight beam is arranged in each support beam upper end, each bearing upper end is fixedly connected on straight beam, the engaging lug of each installs fixture upper surface is rotatablely connected by corresponding rolling bearing and corresponding bearing, each installs fixture is clipped on the node of the first natural frequency of blade, heating component includes temperature-control circuit, driving power, driving power is powered for temperature-control circuit, temperature-control circuit is set on the blade of test, several detector resistance are set in temperature-control circuit and obtain the real-time resistance value of each detector resistance.
Description
Technical field
The present invention relates to a kind of mechanical oscillation experimental provisions of helicopter blade, especially a kind of to be based on resonance method high frequency heat
Carry blade fatigue experimental device.
Background technology
Fatigue is the main reason for causing mechanical component to fail, and may cause catastrophic accident.Rotor blade
One of several big components of most critical as helicopter, bear complicated period alternating load for a long time, thus its performance it is good with
The bad overall performance for directly affecting helicopter, safety of the simul relation to flight.Currently, solving the safe handling longevity of rotor blade
The effective ways for ordering this problem are exactly by fatigue test, to obtain the fatigue behaviour parameter of blade.Therefore, in helicopter
Fatigue experiment verification must be carried out before sizing.Helicopter blade is a kind of slim-lined construction, when work bear multidirectional vibration and
Dead load.Fatigue test of helicopter blades, it is desirable that simulate true working environment, the entire blade length of experimental simulation as far as possible
Response on direction, there is prodigious difficulty, even not possible with.
Invention content
The purpose of the present invention is to provide one kind carrying blade fatigue experimental device based on resonance method high frequency heat, can be to blade
Interior heating component is quickly tested under big strained condition, and result accuracy is high.
Realize that the technical solution of the object of the invention is：One kind carrying blade fatigue experimental device, packet based on resonance method high frequency heat
Include shake table, two support beams, two bearings, two rolling bearings, two installs fixtures, two heating components；Shake table
Among two support beams, blade is centrally disposed on shake table, and straight beam, each bearing is arranged in each support beam upper end
Upper end is fixedly connected on straight beam, and the engaging lug of each installs fixture upper surface is rotated by corresponding rolling bearing and corresponding bearing
Connection, each installs fixture are clipped on the node of the first natural frequency of blade, and heating component includes temperature-control circuit, driving
Power supply, driving power are powered for temperature-control circuit, and temperature-control circuit is set on the blade of test, in temperature-control circuit
Several detector resistance are set and obtain the real-time resistance value of each detector resistance.
One kind carrying blade fatigue test method based on resonance method high frequency heat, includes the following steps：
Blade vibrates under the driving of shake table；
Detection resistance repeated heating & cooling in temperature-control circuit；
At least record heating cooling cycle number, detection resistance resistance value, detection resistance surface temperature, heating voltage, if electric
Resistance value change and/or detection resistance surface temperature variation abnormality are hindered, then blade fails.
Using the above method, the process of detection resistance repeated heating & cooling is：It powers for temperature-control circuit, when detection electricity
Resistance temperature has reached preset value, and temperature-control circuit disconnects, blade natural cooling；It is cooled to preset temperature, for temperature control electricity
Road powers, and starts energy supply heating, until detection resistance reaches preset temperature again, so recycles.
Using the above method, accelerometer is set on blade, frequency analysis is carried out to acceleration signal, if vibration frequency
Deviate preset range, then straight beam destroys or shake table breaks down, and closes shake table.
Compared with prior art, the present invention haing the following advantages：(1) present invention is not shaken directly using strain signal
Dynamic control, but frequency analysis is carried out to acceleration signal, if vibration frequency deviates preset range, straight beam destroys or control
System jam processed needs to close shake table immediately；The output power of power amplifier is detected simultaneously, indicates whether the dynamic of straight beam
Mechanical characteristic changes；(2) installs fixture is clipped on the node of the first natural frequency of blade, is swashed according to first natural frequency
Encourage, should be able to complete within (1-2 days) in a relatively short period of time millions of Cyclic Strains, the blade obtained under this experimental provision it is tired
Labor performance parameter can provide reliable foundation for the assessment in service life, to determine more reasonably blade criterion of acceptability, to improve warp
Ji benefit；(3) electric-heating assembly judges the connection of entire circuit by detector resistance by temperature control system and power drives
Property.Any circuit disconnection in electric-heating assembly is considered as failing.Circuit disconnects, and resistance means testpieces when changing
Failure.
Description of the drawings
Fig. 1 is experimental provision schematic diagram of the present invention.
Fig. 2 is experimental provision vertical view of the present invention.
Fig. 3 is the A-A sectional views of Fig. 2.
Specific implementation mode
In conjunction with Fig. 1, Fig. 2, one kind carrying blade fatigue experimental device, including 1, two branch of shake table based on resonance method high frequency heat
Support 2, two, crossbeam bearing 5, two 6, two, rolling bearing installs fixture 7, two heating component 3, several foil gauges, acceleration
Meter 9；Wherein shake table 1 is located among two support beams 2, and blade 8 is centrally disposed on shake table 1, several foil gauge settings
On blade 8, straight beam 4 is arranged in 2 upper end of each support beam, and 5 upper end of each bearing is fixedly connected on straight beam 4, each installation
The engaging lug of 7 upper surface of fixture is rotatablely connected by corresponding rolling bearing 6 and corresponding bearing 5, and each installs fixture 7 is clipped in blade
On the node of 8 first natural frequency, heating component 3 includes temperature-control circuit, driving power, and driving power controls for temperature
Circuit is powered, and temperature-control circuit is set on the blade 8 of test, and detection resistance is arranged in temperature-control circuit and obtains each
The real-time resistance value of detector resistance, accelerometer 9 are set on blade 8.
Support beam 2 is fixed by earth stud and ground.
Bearing 5 is for installing testpieces 8, and bearing one is fixed in support beam 2, and one is fixed on experiment by fixture
On two nodes of first natural frequency of part 8.Bearing 5 can pass through by rolling bearing 6 around 5 center rotation in surface of bearing
It acts on the plane rocking that testpieces 8 may be implemented.
Shake table 1 provides exciting force with the first rank natural mode of vibration frequency of blade 8.
Foil gauge has 4, and each two is set to 8 both ends of blade and foil gauge is symmetrical arranged.
Cable connector position is arranged in the place closer apart from straight beam center line as far as possible, so that it bears maximum strain water
It is flat.
Force snesor is also set up on blade 8, closed circuit is constituted with accelerometer 9, is driven and vibrated by power amplifier
Platform.Specifically, the acceleration that accelerometer obtains is converted into frequency, the driving force meter provided with the vibrator that force snesor measures
Vibration frequency signal is calculated, vibration frequency signal is amplified by power amplifier.
Shake table applies exciting force at the midpoint of straight beam, uses the first rank natural mode of vibration frequency under " free-free " state
Rate is to it into row energization.
One kind carrying blade fatigue test method based on resonance method high frequency heat, includes the following steps：
Blade 8 vibrates under the driving of shake table 1；
Detection resistance repeated heating & cooling in temperature-control circuit；
At least record heating cooling cycle number, detection resistance resistance value, detection resistance surface temperature, heating voltage, strain,
If resistance changes and/or detection resistance surface temperature variation abnormality, blade 8 fails.
The process of detection resistance repeated heating & cooling is：It powers for temperature-control circuit, when detection resistance temperature reaches
Preset value, temperature-control circuit disconnect, 8 natural cooling of blade；It is cooled to preset temperature, is powered for temperature-control circuit, is started
Energy supply heating is so recycled until detection resistance reaches preset temperature again.
Accelerometer 9 is set on blade 8, frequency analysis is carried out to acceleration signal, if vibration frequency deviates predetermined model
It encloses, then straight beam 4 destroys or shake table 1 breaks down, and closes shake table 1.
Claims (7)
1. one kind carrying blade fatigue experimental device based on resonance method high frequency heat, which is characterized in that including shake table (1), two branch
Support crossbeam (2), two bearings (5), two rolling bearings (6), two installs fixtures (7), two heating components (3), Ruo Ganying
Become piece；Wherein
Shake table (1) is located among two support beams (2),
Blade (8) is centrally disposed on shake table (1),
Several foil gauges are arranged on blade (8),
Each support beam (2) upper end setting straight beam (4),
Each bearing (5) upper end is fixedly connected on straight beam (4),
The engaging lug of each installs fixture (7) upper surface is rotatablely connected by corresponding rolling bearing (6) and corresponding bearing (5),
On the node for the first natural frequency that each installs fixture (7) is clipped in blade (8),
Heating component (3) includes temperature-control circuit, driving power,
Driving power is powered for temperature-control circuit,
Temperature-control circuit is set on the blade (8) of test,
Detection resistance is set in temperature-control circuit and obtains the real-time resistance value of each detector resistance.
2. the apparatus according to claim 1, which is characterized in that accelerometer (9) is arranged on blade (8).
3. the apparatus according to claim 1, which is characterized in that shake table (1) is with the first rank natural mode of vibration frequency of blade (8)
Rate provides exciting force.
4. the apparatus according to claim 1, which is characterized in that foil gauge has 4, and each two is set to blade (8) both ends
And foil gauge is symmetrical arranged.
5. a kind of blade fatigue test method based on claim 1 described device, which is characterized in that include the following steps：
Blade (8) vibrates under the driving of shake table (1)；
Detection resistance repeated heating & cooling in temperature-control circuit；
At least record heating cooling cycle number, detection resistance resistance value, detection resistance surface temperature, heating voltage, strain, if electric
Resistance value change and/or detection resistance surface temperature variation abnormality are hindered, then blade (8) fails.
6. according to the method described in claim 5, it is characterized in that, the process of detection resistance repeated heating & cooling is：For temperature
Control circuit is powered, and when detection resistance temperature has reached preset value, temperature-control circuit disconnects, blade (8) natural cooling；It is cooling
It to preset temperature, powers for temperature-control circuit, starts energy supply heating, until detection resistance reaches preset temperature again, so
Cycle.
7. according to the method described in claim 5, it is characterized in that, accelerometer (9) is arranged on blade (8), to acceleration
Signal carries out frequency analysis, if vibration frequency deviates preset range, straight beam (4) destroys or shake table (1) breaks down, and closes
Close shake table (1).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810830816.5A CN108760540A (en) | 2018-07-26 | 2018-07-26 | Blade fatigue experimental device is carried based on resonance method high frequency heat |
| CN201910105127.2A CN109632536A (en) | 2018-07-26 | 2019-02-01 | Blade fatigue experimental device is carried based on resonance method high frequency heat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810830816.5A CN108760540A (en) | 2018-07-26 | 2018-07-26 | Blade fatigue experimental device is carried based on resonance method high frequency heat |
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| Publication Number | Publication Date |
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| CN108760540A true CN108760540A (en) | 2018-11-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810830816.5A Pending CN108760540A (en) | 2018-07-26 | 2018-07-26 | Blade fatigue experimental device is carried based on resonance method high frequency heat |
| CN201910105127.2A Pending CN109632536A (en) | 2018-07-26 | 2019-02-01 | Blade fatigue experimental device is carried based on resonance method high frequency heat |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910105127.2A Pending CN109632536A (en) | 2018-07-26 | 2019-02-01 | Blade fatigue experimental device is carried based on resonance method high frequency heat |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110186634A (en) * | 2019-05-23 | 2019-08-30 | 南京航空航天大学 | A kind of hot load fatigue test method of anti-deicing electric heating assembly of helicopter rotor blade |
| CN116499638A (en) * | 2023-04-27 | 2023-07-28 | 浙江大学 | Soil pressure sensor particle sensitivity testing system and testing method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112504589B (en) * | 2020-10-30 | 2023-08-04 | 哈尔滨飞机工业集团有限责任公司 | Helicopter composite material main blade airfoil section static strength test system and method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2336511C1 (en) * | 2007-04-24 | 2008-10-20 | Федеральное государственное унитарное предприятие "Центральный институт авиационного моторостроения имени П.И. Баранова" | Method of blade machine rotor body test for impenetrability and device for its implementation |
| CN105806602B (en) * | 2016-03-16 | 2019-06-25 | 中国直升机设计研究所 | A kind of main blade fatigue experimental device of anti-deicing |
| CN206601289U (en) * | 2016-11-29 | 2017-10-31 | 中国直升机设计研究所 | A kind of helicopter heating component fatigue testing clamping device |
| CN107941636A (en) * | 2017-11-08 | 2018-04-20 | 武汉航空仪表有限责任公司 | A kind of fatigue life test system and method for helicopter blade electric heating assembly |
-
2018
- 2018-07-26 CN CN201810830816.5A patent/CN108760540A/en active Pending
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2019
- 2019-02-01 CN CN201910105127.2A patent/CN109632536A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110186634A (en) * | 2019-05-23 | 2019-08-30 | 南京航空航天大学 | A kind of hot load fatigue test method of anti-deicing electric heating assembly of helicopter rotor blade |
| CN110186634B (en) * | 2019-05-23 | 2021-04-09 | 南京航空航天大学 | Heat load fatigue test method for helicopter rotor blade deicing-preventing electric heating assembly |
| CN116499638A (en) * | 2023-04-27 | 2023-07-28 | 浙江大学 | Soil pressure sensor particle sensitivity testing system and testing method |
| CN116499638B (en) * | 2023-04-27 | 2023-10-17 | 浙江大学 | Soil pressure sensor particle sensitivity testing system and testing method |
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| CN109632536A (en) | 2019-04-16 |
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Application publication date: 20181106 |
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