CN101315325A - Method and device for extracting dynamic mechanics parameter of material under static pressure - Google Patents
Method and device for extracting dynamic mechanics parameter of material under static pressure Download PDFInfo
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- CN101315325A CN101315325A CN 200710054476 CN200710054476A CN101315325A CN 101315325 A CN101315325 A CN 101315325A CN 200710054476 CN200710054476 CN 200710054476 CN 200710054476 A CN200710054476 A CN 200710054476A CN 101315325 A CN101315325 A CN 101315325A
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Abstract
A method and devices for extracting material dynamic mechanical parameters under the static pressure relate to the material testing technology field. The method for extracting material dynamic mechanical parameters under the static pressure comprises the steps of carrying out signal excitation to a sample under a certain static pressure, radiating a laser beam on the sample to be tested, and obtaining the dynamic mechanical parameters of the material by receiving and processing a scattered signal. The devices for extracting material dynamic mechanical parameters under the static pressure include an environmental cell (14) interior, a pressure vessel (3), a laser, a vibrator, a pressure device, a power amplifier, a monitoring apparatus and a computer. The method and the devices can solve the difficulty that the prior commercialized testing set can not obtain the material dynamic mechanical parameters under the static pressure, thereby providing data support for the development on pressure-resistant underwater acoustic materials.
Description
Technical field
The present invention relates to the testing of materials technical field, is a kind of method and device that utilizes the dynamic mechanics parameter of laser technology test material under static pressure.
Background technology
At present, dynamic mechanics parameter is the internal energy dissipation of exosyndrome material and the important parameter of vibrating fatigue characteristic, be the parameter that Structural Dynamics design and underwater acoustic materials development must obtain, this parameter has obtained using very widely in damping material and underwater acoustic materials research and development.
Test material dynamic mechanical parametric technique and instrument are a lot, and GB/T 16406-1996 " the flexural resonance method of testing of acoustics acoustical material damping capacity ", GB/T 18258 " damping material damping capacity method of testing ", GJB981-1990 standards such as " viscoelastic damping material force off-resonance type dynamic testing method " have proposed the whole bag of tricks of test material dynamic mechanics parameter.How not obtain the dynamic mechanics parameter of material under static pressure but relate to.The instrument that commercialization at present is used for the test material dynamic mechanical is a lot, VA3000 viscoelastic instrument as French 01dB company, the DMA2980 thermomechanical analyzer of TA company, the DMA 7e thermomechanical analyzer of Perkin Elmer company etc., but only can the performance of test material under condition of normal pressure.Because the correlativity between dynamic mechanics parameter of material and its underwater sound performance, the dynamic mechanics parameter that obtains under the static pressure can provide foundation for the underwater acoustic materials research and development of using under deep water conditions, thereby has very important significance for the research of withstand voltage underwater acoustic materials.
Still the patent report that does not have the dynamic mechanics parameter of material method and apparatus under the hydrostatic pressing condition both at home and abroad.
A kind of acousto-optic scanning laser vibration measurer that utilizes that United States Patent (USP) (seeing publication number US 6,320,665) is introduced is tested macroscopical assembly and microcosmic assembly dynamic mechanical method and apparatus.This device is divided into two bundle orthogonal polarizations bundles with the single-frequency laser bundle, and the surface that one of them light beam incides investigation is returned then, and this light beam produces with another light beam that reflects from reference surface interferes.In the interference point position one photo-detector is arranged, the signal of this detector can obtain the dynamic parameter of sample through signal processor.But this method can't obtain the dynamic mechanics parameter of material under the static pressure condition.
Summary of the invention
For overcoming the deficiencies in the prior art, the purpose of this invention is to provide a kind of method and device of extracting dynamic mechanics parameter of material under static pressure; Solve the problem that prior art can't obtain the dynamic mechanics parameter of material under the static pressure condition by laser technology.
For achieving the above object, the present invention adopts technical scheme as described below:
The method of described extracting dynamic mechanics parameter of material under static pressure, be that the sample that is under certain static pressure is carried out signal excitation, on sample, by the dynamic mechanics parameter that reception and processing to scattered signal obtain material, its step is as follows with the laser beam radiation:
1) sample that is under certain static pressure is carried out the vibration signal excitation, its excitation is the signal that AWG (Arbitrary Waveform Generator) is produced by Vib., behind power amplifier, passes to sample through vibration transmission rod; Its vibration signal excitation comprises the excitation that resonant method, unforced resonant method and wave propagation method produce;
2) utilize on the sample of lasing light emitter radiation in the processing pressure container that laser instrument provides, produce scattered signal;
3) receive also processing signals, obtain the dynamic mechanical and the acoustical behavior parameter of material, be that change in displacement characteristic and sonic propagation characteristic by sample is recorded, handle dynamic mechanics parameter and the acoustical behavior parameter that obtains material hydrostatic pressure power condition through receiving and analyzing.
Its operation steps is as follows: select each component groups cost device for use, wherein, pressure vessel 3 can have the stainless steel pressing pressure device of the glass window that three laser can pass.
1) with computing machine, signal source, power amplifier, wave filter, oscillograph etc., preheating 20 minutes;
2) sample is adhered on the vibration transmission rod that Vib. links to each other, in case of necessity to the sample processing of dyeing;
3) according to the test needs, adjust the temperature and pressure in the pressure vessel, and make it to keep constant;
4) according to test request, set the type of pumping signal, and parameter settings such as regulatory work rate amplifier, wave filter;
5) open test procedure, sample is encouraged, adopt under the laser instrument test static pressure condition, the signal specific excitation is the surface vibration response of sample down;
6) record and processing vibratory response information according to the relation between vibratory response and the material dynamic mechanical performance, can obtain the dynamic mechanical parameter of material under the static pressure condition by programmed control.
The device of described extracting dynamic mechanics parameter of material under static pressure comprises: in the environmental chamber, pressure vessel, laser instrument, Vib., pressue device, power amplifier, supervising device and computing machine; Be provided with pressure vessel in its environmental chamber, pressure vessel top is communicated with pressue device by pipeline; Pressure vessel middle part and bottom are provided with glass window; The top device of pressure vessel inside has Vib., and the Vib. bottom is fixed with testing sample by vibration transmission rod; Outside glass window, be provided with the laser instrument corresponding in the environmental chamber with between the pressure vessel with it, the below of its pressure vessel middle part laser instrument is provided with the real time monitoring apparatus of pressure vessel, and the real time monitoring apparatus below is provided with the temperature, pressure supervising device of pressure vessel; Real time monitoring apparatus and temperature, pressure supervising device are controlled by gpib bus by computing machine.
The device of described extracting dynamic mechanics parameter of material under static pressure, its pressure vessel is provided with the window that several laser can see through, and its pressure vessel can bear the static pressure greater than 5MPa; Temperature can be controlled in its pressure vessel.
The device of described extracting dynamic mechanics parameter of material under static pressure, its Vib. is made by piezoelectric ceramic piece.
The device of described extracting dynamic mechanics parameter of material under static pressure, its pressue device adopts air compressor or other pressue devices.
The device of described extracting dynamic mechanics parameter of material under static pressure, the real time monitoring apparatus of its pressure vessel is monitored sample deformation by camera by monitor.
The device of described extracting dynamic mechanics parameter of material under static pressure, the temperature, pressure supervising device of its pressure vessel is by the temperature in electrical heating or other type of heating and liquid nitrogen or the dry ice controlled pressure container; By the temperature and pressure in thermopair and the pressure transducer detected pressures container.
Because adopt aforesaid technical scheme, the present invention has following superiority:
Can obtain the dynamic mechanical parameter of material under static pressure by the present invention, can solve existing commercial testing tool and can't obtain this difficult problem of material dynamic mechanical performance parameter under the static pressure, for the development of withstand voltage underwater acoustic materials provides the data support.
Description of drawings
Fig. 1 is the block scheme of vibration measurement with laser method test material dynamic parameter device;
Fig. 2 is the structural representation of vibration measurement with laser method test material dynamic parameter device;
Among the figure: the 1-laser instrument; The 2-Vib.; The 3-pressure vessel; The 4-generator; The 5-power amplifier; The 6-oscillograph; The 7-wave filter; 8-computing machine, 9-real time monitoring apparatus; The 10-pressue device; 11-temperature and pressure monitor; The 12-testing sample; The 13-glass window; The 14-environmental chamber; The 15-pipeline; The 16-vibration transmission rod.
Embodiment
As shown in Figure 1, 2: the method for this extracting dynamic mechanics parameter of material under static pressure, be that the sample that is under certain static pressure is carried out signal excitation, with the laser beam radiation on sample, by the dynamic mechanics parameter that reception and processing to scattered signal obtain material, its step is as follows:
1) sample that is under certain static pressure is carried out the vibration signal excitation, its excitation is the signal that AWG (Arbitrary Waveform Generator) (4) is produced by Vib. (2), behind power amplifier (5), passes to testing sample (12) through vibration transmission rod (16); Its vibration signal excitation comprises the excitation that resonant method, unforced resonant method and wave propagation method produce;
2) utilize on the testing sample (12) of lasing light emitter radiation in processing pressure container (3) that laser instrument (1) provides, produce scattered signal;
3) receive also processing signals, obtain the dynamic mechanical and the acoustical behavior parameter of material, be that change in displacement characteristic and sonic propagation characteristic by testing sample (12) is recorded, handle dynamic mechanics parameter and the acoustical behavior parameter that obtains material hydrostatic pressure power condition through receiving and analyzing.
The device of this extracting dynamic mechanics parameter of material under static pressure comprises: in the environmental chamber (14), pressure vessel (3), laser instrument, Vib., pressue device, power amplifier, supervising device and computing machine; Be provided with pressure vessel (3) in its environmental chamber (14), pressure vessel top is communicated with pressue device (10) by pipeline (15); Pressure vessel (3) middle part and bottom are provided with glass window (13); The inner top device of pressure vessel (3) has Vib. (2), and the Vib. bottom is fixed with testing sample (12) by vibration transmission rod (16); Outside glass window (13), be provided with the laser instrument corresponding (1) in the environmental chamber (14) with between the pressure vessel (3) with it, the below of its pressure vessel (3) middle part laser instrument is provided with the real time monitoring apparatus (9) of pressure vessel, and the real time monitoring apparatus below is provided with the temperature, pressure supervising device (11) of pressure vessel; Real time monitoring apparatus (9) is controlled by gpib bus by computing machine (8) with temperature, pressure supervising device (11).
Its pressure vessel (3) is provided with the window (13) that several laser can see through, and its pressure vessel can bear the static pressure greater than 5MPa; Temperature can be controlled in its pressure vessel.Its Vib. (2) is made by piezoelectric ceramic piece.Its pressue device (10) adopts air compressor or other pressue devices.The real time monitoring apparatus of its pressure vessel (9) is connected the monitor of monitoring sample (12) deformation by camera.The temperature, pressure supervising device (11) of its pressure vessel is by the temperature in electrical heating or other type of heating and liquid nitrogen or the dry ice controlled pressure container; By the temperature and pressure in thermopair and the pressure transducer detected pressures container.
Its operation steps is as follows: select each component groups cost device for use, wherein, pressure vessel 3 can have the stainless steel pressing pressure device of the glass window (13) that three laser can pass.
1) with computing machine, signal source, power amplifier, wave filter, oscillograph etc., preheating 20 minutes;
2) sample is adhered on the vibration transmission rod that Vib. links to each other, in case of necessity to the sample processing of dyeing;
3) according to the test needs, adjust the temperature and pressure in the pressure vessel, and make it to keep constant;
4) according to test request, set the type of pumping signal, and parameter settings such as regulatory work rate amplifier, wave filter;
5) open test procedure, sample is encouraged, adopt under the laser instrument test static pressure condition, the signal specific excitation is the surface vibration response of sample down;
6) record and processing vibratory response information according to the relation between vibratory response and the material dynamic mechanical performance, can obtain the dynamic mechanical parameter of material under the static pressure condition by programmed control.
The device of this extracting dynamic mechanics parameter of material under static pressure is made up of pressure vessel (3), laser instrument, Vib., video camera, air compressor, power amplifier, wave filter, AWG (Arbitrary Waveform Generator), oscillograph, computing machine.Wherein laser instrument provides laser; The signal that Vib. produces AWG (Arbitrary Waveform Generator) behind power amplifier, passes to sample through vibration transmission rod, and the change in displacement characteristic and the sonic propagation characteristic of sample are recorded, and analyzing and processing obtains the dynamic mechanics parameter of material hydrostatic pressure power condition.
Adopt the device of laser testing material dynamic performance parameter, the device that sample is housed has several windows, and laser can pass window, and radiation is on sample; And pressure vessel can bear and be not less than the 5MPa static pressure; Temperature can be controlled in the pressure vessel of described sample.
Wherein laser instrument 1 produces laser; Vib. 2 changes electric signal into vibration signal; Pressure vessel 3 provides static pressure by 10 for sample; Signal source 4 provides signal; Power amplifier 5 amplifies the signal that produces; Oscillograph 6 is used for showing and tracer signal; Wave filter 7 filters undesired signal; Computing machine 8 is used for process information and by program control signal source 4, oscillograph 6 and wave filter 7; Camera 9 is used for monitoring sample deformation; Air compressor 10 is used for controlling the static pressure of sampling receptacle; Temperature and pressure monitor 11 is used for monitoring in real time the pressure and temperature situation in the sampling receptacle.
Claims (7)
1, a kind of method of extracting dynamic mechanics parameter of material under static pressure, it is characterized in that: be that the sample that is under certain static pressure is carried out signal excitation, with the laser beam radiation on sample, by the dynamic mechanics parameter that reception and processing to scattered signal obtain material, its step is as follows:
1) sample that is under certain static pressure is carried out the vibration signal excitation, its excitation is the signal that AWG (Arbitrary Waveform Generator) (4) is produced by Vib. (2), behind power amplifier (5), passes to testing sample (12) through vibration transmission rod (16); Its vibration signal excitation comprises the excitation that resonant method, unforced resonant method and wave propagation method produce;
2) utilize on the testing sample (12) of lasing light emitter radiation in processing pressure container (3) that laser instrument (1) provides, produce scattered signal;
3) receive also processing signals, obtain the dynamic mechanical and the acoustical behavior parameter of material, be that change in displacement characteristic and sonic propagation characteristic by testing sample (12) is recorded, handle dynamic mechanics parameter and the acoustical behavior parameter that obtains material hydrostatic pressure power condition through receiving and analyzing;
Its operation steps is as follows: select each component groups cost device for use, wherein, pressure vessel 3 can have the stainless steel pressing pressure device of the glass window (13) that three laser can pass;
1) with computing machine, signal source, power amplifier, wave filter, oscillograph etc., preheating 20 minutes;
2) sample is adhered on the vibration transmission rod that Vib. links to each other, in case of necessity to the sample processing of dyeing;
3) according to the test needs, adjust the temperature and pressure in the pressure vessel, and make it to keep constant;
4) according to test request, set the type of pumping signal, and parameter settings such as regulatory work rate amplifier, wave filter;
5) open test procedure, sample is encouraged, adopt under the laser instrument test static pressure condition, the signal specific excitation is the surface vibration response of sample down;
6) record and processing vibratory response information according to the relation between vibratory response and the material dynamic mechanical performance, can obtain the dynamic mechanical parameter of material under the static pressure condition by programmed control.
2, a kind of device of extracting dynamic mechanics parameter of material under static pressure is characterized in that: comprising: in the environmental chamber (14), pressure vessel (3), laser instrument, Vib., pressue device, power amplifier, supervising device and computing machine; Be provided with pressure vessel (3) in its environmental chamber (14), pressure vessel top is communicated with pressue device (10) by pipeline (15); Pressure vessel (3) middle part and bottom are provided with glass window (13); The inner top device of pressure vessel (3) has Vib. (2), and the Vib. bottom is fixed with testing sample (12) by vibration transmission rod (); Outside glass window (13), be provided with the laser instrument corresponding (1) in the environmental chamber (14) with between the pressure vessel (3) with it, the below of its pressure vessel (3) middle part laser instrument is provided with the real time monitoring apparatus (9) of pressure vessel, and the real time monitoring apparatus below is provided with the temperature, pressure supervising device (11) of pressure vessel; Real time monitoring apparatus (9) is controlled by gpib bus by computing machine (8) with temperature, pressure supervising device (11).
3, the device of extracting dynamic mechanics parameter of material under static pressure according to claim 2 is characterized in that: its pressure vessel (3) is provided with the window (13) that several laser can see through, and its pressure vessel can bear the static pressure greater than 5MPa; Temperature can be controlled in its pressure vessel.
4, the device of extracting dynamic mechanics parameter of material under static pressure according to claim 2 is characterized in that: its Vib. (2) is made by piezoelectric ceramic piece.
5, the device of extracting dynamic mechanics parameter of material under static pressure according to claim 2 is characterized in that: its pressue device (10) adopts air compressor or other pressue devices.
6, the device of extracting dynamic mechanics parameter of material under static pressure according to claim 2 is characterized in that: the real time monitoring apparatus of its pressure vessel (9) is connected the monitor of monitoring sample (12) deformation by camera.
7, the device of extracting dynamic mechanics parameter of material under static pressure according to claim 2, it is characterized in that: the temperature, pressure supervising device (11) of its pressure vessel, by the temperature in electrical heating or other type of heating and liquid nitrogen or the dry ice controlled pressure container; By the temperature and pressure in thermopair and the pressure transducer detected pressures container.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200710054476 CN101315325A (en) | 2007-05-28 | 2007-05-28 | Method and device for extracting dynamic mechanics parameter of material under static pressure |
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| CN 200710054476 CN101315325A (en) | 2007-05-28 | 2007-05-28 | Method and device for extracting dynamic mechanics parameter of material under static pressure |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102866071A (en) * | 2012-10-23 | 2013-01-09 | 朱占元 | Building method of ice layer dynamic settlement prediction model |
| CN104568572A (en) * | 2015-02-17 | 2015-04-29 | 湖北工业大学 | Method for measuring complete stress-strain process material parameters by using hydrostatic pressure unloading process |
| CN110161048A (en) * | 2019-06-17 | 2019-08-23 | 西南交通大学 | Super high cycle fatigue damage test system based on advanced light source in situ imaging |
| CN111751200A (en) * | 2020-06-29 | 2020-10-09 | 中国科学院声学研究所 | System and method for testing dynamic modulus of viscoelastic material |
| CN111795661A (en) * | 2020-06-29 | 2020-10-20 | 中国科学院声学研究所 | Method and system for detecting three-dimensional geometric morphology of underwater acoustic material |
-
2007
- 2007-05-28 CN CN 200710054476 patent/CN101315325A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102866071A (en) * | 2012-10-23 | 2013-01-09 | 朱占元 | Building method of ice layer dynamic settlement prediction model |
| CN104568572A (en) * | 2015-02-17 | 2015-04-29 | 湖北工业大学 | Method for measuring complete stress-strain process material parameters by using hydrostatic pressure unloading process |
| CN110161048A (en) * | 2019-06-17 | 2019-08-23 | 西南交通大学 | Super high cycle fatigue damage test system based on advanced light source in situ imaging |
| CN111751200A (en) * | 2020-06-29 | 2020-10-09 | 中国科学院声学研究所 | System and method for testing dynamic modulus of viscoelastic material |
| CN111795661A (en) * | 2020-06-29 | 2020-10-20 | 中国科学院声学研究所 | Method and system for detecting three-dimensional geometric morphology of underwater acoustic material |
| CN111751200B (en) * | 2020-06-29 | 2021-06-15 | 中国科学院声学研究所 | System and method for testing dynamic modulus of viscoelastic material |
| CN111795661B (en) * | 2020-06-29 | 2022-01-28 | 中国科学院声学研究所 | Method and system for detecting three-dimensional geometric morphology of underwater acoustic material |
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Open date: 20081203 |