CN108931445A - Rock dynamic mechanical property experimental provision under a kind of microwave radiation - Google Patents

Rock dynamic mechanical property experimental provision under a kind of microwave radiation Download PDF

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Publication number
CN108931445A
CN108931445A CN201810658794.9A CN201810658794A CN108931445A CN 108931445 A CN108931445 A CN 108931445A CN 201810658794 A CN201810658794 A CN 201810658794A CN 108931445 A CN108931445 A CN 108931445A
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China
Prior art keywords
microwave radiation
microwave
bar
refractory ceramics
mechanical property
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CN201810658794.9A
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Inventor
尹土兵
胡毕伟
李夕兵
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Central South University
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Central South University
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Publication of CN108931445A publication Critical patent/CN108931445A/en
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/30Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00Radiation pyrometry, e.g. infrared or optical thermometry
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/02Details
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/02Details
    • G01N3/04Chucks
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/003Generation of the force
    • G01N2203/0032Generation of the force using mechanical means
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02Details not specific for a particular testing method
    • G01N2203/022Environment of the test
    • G01N2203/0222Temperature
    • G01N2203/0226High temperature; Heating means
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02Details not specific for a particular testing method
    • G01N2203/04Chucks, fixtures, jaws, holders or anvils
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02Details not specific for a particular testing method
    • G01N2203/06Indicating or recording means; Sensing means
    • G01N2203/067Parameter measured for estimating the property
    • G01N2203/0676Force, weight, load, energy, speed or acceleration

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  • Physics & Mathematics (AREA)
  • General 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)
  • Immunology (AREA)
  • Pathology (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Investigating Or Analyzing Materials Using Thermal Means (AREA)

Abstract

The invention discloses rock dynamic mechanical property experimental provisions under a kind of microwave radiation, comprising: microwave radiation chamber;It is correspondingly arranged at the first refractory ceramics bar and the second refractory ceramics bar of microwave radiation chamber two sides, the first refractory ceramics bar and the second refractory ceramics bar slide through microwave radiation chamber side wall respectively to enter microwave radiation intracavitary to clamp sample;SHPB system, incident bar and transmission bar are respectively aligned to the first refractory ceramics bar and second one end of refractory ceramics bar far from sample;Microwave irradiation system is used for the intracavitary feed-in microwave of microwave radiation;Temperature monitoring system is measured in real time for the temperature to sample.The present invention, which can be realized, carries out dynamic characteristics research to rock in microwave field, realizes the rock dynamic experiments under microwave irradiation.

Description

Rock dynamic mechanical property experimental provision under a kind of microwave radiation
Technical field
The invention belongs to rock dynamic forces under mining engineering and Geotechnical Engineering field more particularly to a kind of microwave radiation Learn property experiment device.
Background technique
Catalase is the important link in mining process, studies the broken rock device and method of economical and efficient for getter Journey plays a significant role.Presently, traditional mechanical rock breaking and blasting method are still the broken main means of mine hard rock, so And the abrasion of cutter and blasting method bring safety and inefficiency problem are the masters in hard rock shattering process during mechanical rock breaking Want problem.In recent decades, every country constantly seeks new efficient rock-breaking method, such as plasma rock breaking method, water jet Method, heating power broken rock method, microwave method etc..
Microwave-assisted mechanical rock breaking method is utilized its essence is being combined using microwave heating technique and mechanical rock breaking technology Microwave first reduces its intensity to rock heat, so that accelerating mechanical rock breaking efficiency reduces tool wear degree, is continuously opened with reaching The purpose adopted.During microwave-assisted mechanical rock breaking, rock is at high operating temperatures to be crushed by dynamic impulse force, and rock Mechanical property and temperature have it is close related, for researching high-temperature high strain-rate in the case where rock dynamic mechanical property, A kind of relevant experimental facilities is developed with regard to most important, microwave irradiation system is added in the extensive SHPB system of connected applications thus, There is certain meaning for the research for deepening rock breaking efficiency for researching high-temperature rock dynamic characteristics.
Summary of the invention
The application aims to solve at least one of the technical problems existing in the prior art.For this purpose, an object of the present invention It is to provide rock dynamic mechanical property experimental provision under a kind of microwave radiation, which can be realized under microwave radiation directly Impact load experiment, trip temperature of going forward side by side measurement are carried out to rock.
In order to solve the above technical problems, the technical solution adopted in the present invention is as follows:
Rock dynamic mechanical property experimental provision under a kind of microwave radiation, comprising:
Microwave radiation chamber;
It is correspondingly arranged at the first refractory ceramics bar and the second refractory ceramics bar of microwave radiation chamber two sides, described first Refractory ceramics bar and the second refractory ceramics bar slide through respectively microwave radiation chamber side wall enter microwave radiation it is intracavitary to Clamp sample;
SHPB system, incident bar and transmission bar are respectively aligned to the first refractory ceramics bar and the second refractory ceramics The one end of bar far from sample;
Microwave irradiation system is used for the intracavitary feed-in microwave of microwave radiation;
Temperature monitoring system is measured in real time for the temperature to sample.
Further, the microwave irradiation system includes magnetron, the rectangular waveguide connecting with magnetron output end, passes through Waveguide switch that annular water load is connect with rectangular waveguide connect with waveguide switch output end and is located at microwave radiation chamber top The electromagnetic horn of sample described in portion's face.
Further, be attached at foil gauge on incident bar and transmission bar and ultra dynamic strain Acquisition Instrument, waveform storage instrument, Computer is connected to form wave data processing system.
Further, microwave radiation bottom of chamber portion is formed with microwave absorption medium storage room, the microwave absorption medium Microwave absorption is filled in storage room, microwave radiation chamber side wall can equipped with what is be connected to the microwave absorption medium storage room The inlet and liquid outlet of opening and closing.
Further, refractory ceramics layer is covered on the microwave absorption.
Further, the magnetron, rectangular waveguide, annular water load and waveguide switch are integrated in microwave control cabinet It is interior.
Further, the temperature monitoring system includes the infrared thermal imaging for being set to microwave radiation chamber transparent window side Instrument, the infrared thermal imager are connected by data processing equipment with the computer of SHPB system.
Further, the microwave radiation chamber is sealed by the micro-wave screening cover of bottom opening and by micro-wave screening cover bottom opening The pedestal closed surrounds, and is formed with metal screen layer on the inner wall of micro-wave screening cover.
Further, the positive and able to turn on or off of microwave radiation chamber is arranged in the transparent window.
Further, institute's transparent window is equipped with handle.
Compared with prior art, the beneficial effects of the present invention are:
(1) there is a set of high-temp and high-strength ceramics quarter butt between incident bar of the present invention, transmission bar and rock, because ceramic quarter butt is It is not influenced by microwave and influence of the temperature to the wave impedance of ceramic bar can also be ignored, while also preventing the temperature of rock Incident bar and transmission bar are had an impact by heat transfer, effectively prevent influence of the temperature to stress wave propagation, Ke Yishi Rock dynamic experiments under the existing condition of high temperature, test are accurate and reliable.
(2) present invention takes microwave absorbing device to can be carried out absorption to extra microwave, reduces microwave for letter to reach The influence of number acquisition, and can efficiently reduce damage of the microwave energy to microwave applicator of reflection.
(3) present invention is connected to a computer using infrared thermal imager by data processing equipment, can be in real time to rock Stone temperature is monitored, and is handled using computer temperature pattern of the rock in irradiation process and heating curve.
(4) the intracavitary portion of microwave radiation is equipped with metal screen layer, can prevent extra microwave leakage from adversely affecting.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention;
Fig. 2 is microwave irradiation system schematic of the present invention;
Fig. 3 is microwave irradiation system of the present invention and microwave radiation chamber assembling schematic diagram;
Fig. 4 is microwave radiation chamber cross-sectional view of the present invention.
Fig. 5 is temperature monitoring system schematic diagram of the present invention.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
Referring to Fig. 1-Fig. 5, in one embodiment, rock dynamic mechanical property experimental provision under a kind of microwave radiation, The workbench 1 of SHPB system (Hopkinson pressure bar test macro) is equipped with microwave radiation chamber 2 and temperature monitoring system 3, temperature Monitoring system is used to carry out real-time measurement to specimen temperature.It is symmetrically arranged with and passes through on the left side wall and right side wall of microwave radiation chamber 2 The road Tong Gan hole 4 (coaxial) is coaxially correspondingly provided with the first refractory ceramics bar 5 and the second high temperature resistant pottery in microwave radiation chamber 2 Porcelain bar 6, when test, sample holder is between the first refractory ceramics bar 5 and the second refractory ceramics bar 6;First high temperature resistant pottery The other end matching of porcelain bar 5 slides through the road left side wall Shang Gan hole 4 and extends to outside microwave radiation chamber 2, the second high temperature resistant pottery The other end matching of porcelain bar 6 slides through the road right side wall Shang Gan hole 4 and extends to outside microwave radiation chamber 2, and SHPB system enters It penetrates bar 7 and transmission bar 8 is respectively aligned to the first refractory ceramics bar 5 and second one end of refractory ceramics bar 6 far from sample, be sticked It is connected in the foil gauge 9 on incident bar 7 and transmission bar 8 with ultra dynamic strain Acquisition Instrument 10, waveform storage instrument 11, computer 12 Form wave data processing system.
It is equipped in microwave radiation top of chamber for the microwave irradiation system to the intracavitary feed-in microwave of microwave radiation.Specifically, Microwave irradiation system includes microwave control cabinet 13, and magnetron 14 is equipped in microwave control cabinet 13, and the output end of magnetron 14 connects Rectangular waveguide 15 is connect, rectangular waveguide 15 passes through annular water load 16 and connects waveguide switch 17, and 17 output end of waveguide switch connects Electromagnetic horn 18 is connect, the output end of electromagnetic horn 18 protrudes into microwave radiation chamber 2 from microwave radiation top of chamber and face sample.
In the present embodiment, there is a set of high-temp and high-strength ceramics quarter butt between incident bar 7, transmission bar 8 and rock, because ceramics are short Bar is not influenced by microwave and influence of the temperature to the wave impedance of ceramic bar can also be ignored, while also preventing rock Temperature has an impact incident bar and transmission bar by heat transfer, effectively prevents influence of the temperature to stress wave propagation, can To realize that the rock dynamic experiments under the condition of high temperature, measuring accuracy are high.
Referring to fig. 4, in another embodiment, microwave radiation chamber 2 is by the micro-wave screening cover 21 of bottom opening and by microwave screen It covers the closed pedestal 22 of 21 bottom opening of cover to surround, metal screen layer 23 is formed on the inner wall of micro-wave screening cover 21, radiate Inside cavity is provided with metal screen layer 23, can prevent extra microwave leakage from adversely affecting.It is formed on pedestal 22 There is microwave absorption medium storage room 24, microwave absorption is filled in microwave absorption medium storage room 24, is covered on microwave absorption It is stamped refractory ceramics layer 25, absorption of the absorbent to extra microwave energy, microwave radiation can be had no effect on by microwave transparent Chamber side wall is equipped with the inlet 26 and liquid outlet 27 of (as with valve) able to turn on or off that is connected to microwave absorption medium storage room 23, Microwave absorption can be injected from inlet 26, be discharged from liquid outlet 27.Microwave absorption can be carried out extra microwave It absorbs, to reach the influence for reducing microwave for signal acquisition, and the microwave energy that can efficiently reduce reflection shines microwave Penetrate the damage of system.
Referring to Fig. 5, in another embodiment, for convenience of being observed sample and placed sample, microwave radiation chamber 2 just Face is equipped with transparent window 19 able to turn on or off, handle 20 is equipped on transparent window 19, when needing to place sample, it is only necessary to open Sample is put into microwave radiation chamber 2 by adjusting the first refractory ceramics bar 5 and the second refractory ceramics bar 6 by transparent window 19 Between spacing clamp sample.
Temperature monitoring system 3 includes being set to the intracavitary infrared thermal imager 31 positioned at transparent window side of microwave radiation, Infrared thermal imager 31 is connected by data processing equipment 32 with the computer 12 of SHPB system, the present embodiment use it is infrared it is hot at It is connected as instrument 31 passes through data processing equipment 32 with computer 12, rock temperature can be monitored in real time, and using meter Calculation machine 12 handles temperature pattern of the rock in irradiation process and heating curve, as the specific of data processing equipment 32 Structure is that details are not described herein for the prior art.
The test process of this experimental provision is as follows:
Radiating enclosures, recombinant incident bar and transmission bar are assembled, incident bar and transmission bar are given and add stress, by rock sample It is fixed in microwave radiation cavity and tight with the first refractory ceramics bar and the second refractory ceramics bar cramp;
Infrared thermometry instrument is opened, is pressurizeed to the bullet device in SHPB system, the time to be irradiated or test are set Temperature to be achieved;
Microwave irradiation cabinet is opened, microwave irradiation is carried out to rock, according to the assigned temperature that the time of setting or rock reach, Bullet valve is unclamped, rock is impacted, computer data acquisition and data processing are passed through.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.

Claims (9)

1. rock dynamic mechanical property experimental provision under a kind of microwave radiation characterized by comprising
Microwave radiation chamber;
It is correspondingly arranged at the first refractory ceramics bar and the second refractory ceramics bar of microwave radiation chamber two sides, the first resistance to height Warm ceramic bar and the second refractory ceramics bar slide through microwave radiation chamber side wall respectively, and to enter microwave radiation intracavitary to clamp Sample;
SHPB system, incident bar and transmission bar are respectively aligned to the first refractory ceramics bar and the second refractory ceramics bar is remote One end from sample;
Microwave irradiation system is used for the intracavitary feed-in microwave of microwave radiation;
Temperature monitoring system is measured in real time for the temperature to sample.
2. rock dynamic mechanical property experimental provision under microwave radiation according to claim 1, it is characterised in that: described micro- Wave irradiation system includes magnetron, the rectangular waveguide connecting with magnetron output end, by annular water load and rectangular waveguide company The waveguide switch that connects, the loudspeaker day for being connect with waveguide switch output end and being located at sample described in microwave radiation top of chamber face Line.
3. rock dynamic mechanical property experimental provision under microwave radiation according to claim 2, it is characterised in that: the magnetic Keyholed back plate, rectangular waveguide, annular water load and waveguide switch are integrated in microwave control cabinet.
4. rock dynamic mechanical property experimental provision under microwave radiation according to claim 2, it is characterised in that: described micro- Wave radiation bottom of chamber portion is formed with microwave absorption medium storage room, is filled with microwave absorption in the microwave absorption medium storage room Agent, microwave radiation chamber side wall are equipped with the inlet and liquid outlet able to turn on or off being connected to the microwave absorption medium storage room.
5. rock dynamic experiments device according to claim 4, it is characterised in that: covered on the microwave absorption There is refractory ceramics layer.
6. rock dynamic mechanical property experimental provision under microwave radiation according to claim 4, it is characterised in that: described micro- Wave radiation chamber is surrounded by the micro-wave screening cover of bottom opening and by the closed pedestal of micro-wave screening cover bottom opening, in micro-wave screening Metal screen layer is formed on the inner wall of cover.
7. rock dynamic mechanical property experimental provision under microwave radiation according to claim 1, it is characterised in that: the temperature Spending monitoring system includes being set to the infrared thermal imager of microwave radiation chamber transparent window side, and the infrared thermal imager passes through Data processing equipment is connected with the computer of SHPB system.
8. rock dynamic mechanical property experimental provision under microwave radiation according to claim 7, it is characterised in that: described The positive and able to turn on or off of microwave radiation chamber is arranged in bright window.
9. rock dynamic mechanical property experimental provision under microwave radiation according to claim 8, it is characterised in that: institute is transparent Window is equipped with handle.
CN201810658794.9A 2018-06-25 2018-06-25 Rock dynamic mechanical property experimental provision under a kind of microwave radiation Pending CN108931445A (en)

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109856165A (en) * 2019-03-29 2019-06-07 西安建筑科技大学 The experimental rig and test method that a kind of microwave influences soil nature matter
CN110261242A (en) * 2019-07-12 2019-09-20 中南大学 A kind of Hopkinson bar rock sample impact test apparatus and method
CN110455741A (en) * 2019-08-19 2019-11-15 广东工业大学 A kind of system for obtaining the real-time infrared spectroscopy in vibration test
CN110501145A (en) * 2019-07-03 2019-11-26 中国科学院武汉岩土力学研究所 A kind of experimental system and test method of TBM driving auxiliary rock
CN111007155A (en) * 2019-12-25 2020-04-14 中南大学 Rock damage monitoring system under temperature-pressure coupling effect
CN111024529A (en) * 2019-12-09 2020-04-17 中南大学 Method for testing dynamic mechanical properties of rock at high temperature and heating furnace matched with method
CN111458239A (en) * 2020-04-12 2020-07-28 北京工业大学 Real-time stress wave propagation test system in high-temperature environment under microwave heating
CN111594040A (en) * 2019-02-19 2020-08-28 中国石油化工股份有限公司 Microwave rock breaking test device
CN111912871A (en) * 2020-06-11 2020-11-10 西安理工大学 Microwave-assisted rock breaking irradiation test device and test method thereof
CN111929150A (en) * 2020-08-25 2020-11-13 中南大学 Surrounding rock dynamics test system and method for railway tunnel under rainy mountain area
CN112067235A (en) * 2020-09-14 2020-12-11 中国空气动力研究与发展中心高速空气动力研究所 Horn antenna S for reducing high-power microwave irradiation wind tunnel test11Arrangement of parameters
CN116519500A (en) * 2023-04-19 2023-08-01 山东科技大学 Method for acquiring dynamic temperature cloud picture of Hopkinson pressure bar sample

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Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111594040B (en) * 2019-02-19 2021-10-01 中国石油化工股份有限公司 Microwave rock breaking test device
CN111594040A (en) * 2019-02-19 2020-08-28 中国石油化工股份有限公司 Microwave rock breaking test device
CN109856165A (en) * 2019-03-29 2019-06-07 西安建筑科技大学 The experimental rig and test method that a kind of microwave influences soil nature matter
CN110501145A (en) * 2019-07-03 2019-11-26 中国科学院武汉岩土力学研究所 A kind of experimental system and test method of TBM driving auxiliary rock
CN110261242A (en) * 2019-07-12 2019-09-20 中南大学 A kind of Hopkinson bar rock sample impact test apparatus and method
CN110261242B (en) * 2019-07-12 2022-04-26 中南大学 Hopkinson bar rock sample impact test device and method
CN110455741A (en) * 2019-08-19 2019-11-15 广东工业大学 A kind of system for obtaining the real-time infrared spectroscopy in vibration test
CN111024529B (en) * 2019-12-09 2021-04-02 中南大学 Method for testing dynamic mechanical properties of rock at high temperature and heating furnace matched with method
CN111024529A (en) * 2019-12-09 2020-04-17 中南大学 Method for testing dynamic mechanical properties of rock at high temperature and heating furnace matched with method
CN111007155B (en) * 2019-12-25 2021-05-04 中南大学 Rock damage monitoring system under temperature-pressure coupling effect
CN111007155A (en) * 2019-12-25 2020-04-14 中南大学 Rock damage monitoring system under temperature-pressure coupling effect
CN111458239A (en) * 2020-04-12 2020-07-28 北京工业大学 Real-time stress wave propagation test system in high-temperature environment under microwave heating
CN111912871A (en) * 2020-06-11 2020-11-10 西安理工大学 Microwave-assisted rock breaking irradiation test device and test method thereof
CN111929150A (en) * 2020-08-25 2020-11-13 中南大学 Surrounding rock dynamics test system and method for railway tunnel under rainy mountain area
CN111929150B (en) * 2020-08-25 2021-07-20 中南大学 Surrounding rock dynamics test system and method for railway tunnel under rainy mountain area
CN112067235A (en) * 2020-09-14 2020-12-11 中国空气动力研究与发展中心高速空气动力研究所 Horn antenna S for reducing high-power microwave irradiation wind tunnel test11Arrangement of parameters
CN112067235B (en) * 2020-09-14 2021-08-13 中国空气动力研究与发展中心高速空气动力研究所 Horn antenna S for reducing high-power microwave irradiation wind tunnel test11Arrangement of parameters
CN116519500A (en) * 2023-04-19 2023-08-01 山东科技大学 Method for acquiring dynamic temperature cloud picture of Hopkinson pressure bar sample
CN116519500B (en) * 2023-04-19 2024-03-12 山东科技大学 Method for acquiring dynamic temperature cloud picture of Hopkinson pressure bar sample

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Application publication date: 20181204