CN204789116U - Novel hopkinson bar - Google Patents
Novel hopkinson bar Download PDFInfo
- Publication number
- CN204789116U CN204789116U CN201520469736.3U CN201520469736U CN204789116U CN 204789116 U CN204789116 U CN 204789116U CN 201520469736 U CN201520469736 U CN 201520469736U CN 204789116 U CN204789116 U CN 204789116U
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- bar
- pressure chamber
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- incident bar
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Abstract
The utility model discloses a novel hopkinson bar, including support frame, confined pressure loading device, incident bar, transmission bar, cylinder, pressure chamber, molecular velocity sieving mechanism, axle load loading device and test system for place the test block confined pressure loading device sets up at the middle part of support frame, and confined pressure loading device's the left and right sides is connected respectively to incident bar and transmission bar. The left end of incident bar disposes vertical baffle, axle load loading device fixes at the support frame right -hand member. The pressure chamber is located the left side of support frame, and the left end of pressure chamber passes through the molecular velocity sieving mechanism to be connected with the cylinder, and internally mounted that the pressure chamber is close to the right -hand member has a drift, has the interval between the right -hand member face of pressure chamber and the baffle. The outer wall of incident bar is connected to test system one end, and the outer wall of transmission bar is connected to the other end. This novel hopkinson bar filters through the gas molecule to speed is different, realizes separately showing the wave form of different frequency on the oscillograph.
Description
Technical field
The utility model relates to field of mechanical technique, is specifically related to a kind of novel Hopkinson bar.
Background technology
The research of Hopkinson bar, from the iron wire impact tension test of J.Hopkinson, by the research of B.Hopkinson, Dunn, Davies, Kolsky, creates present split hopkinson bar.Central South University of China professor Li Xibing etc. improves again on this basis, Hopkinson bar after improvement meets the requirement that simultaneously can apply dynamic load and static load, but can not screen by the gas molecule different to speed, the capitiform that liquidates becomes specific impact, control the stress wave produced, the waveform of different frequency separately can not be presented on oscillograph.Therefore, design a kind of novel Hopkinson bar, can be better research and provide basis with Prediction of Rock Burst and the stress wave propagation mechanism of preventing and treating in closely-related coal petrography composite sample with energy dissipation mechanism, there is realistic meaning.
Utility model content
Technical problem to be solved in the utility model is: for the defect existed in above-mentioned technology, the utility model is to provide a kind of novel Hopkinson bar, screened by the gas molecule different to speed, realize the waveform of different frequency to be separately presented on oscillograph.
In order to solve the problems of the technologies described above, the technical scheme that the utility model adopts is:
A kind of novel Hopkinson bar, comprise bracing frame, confined pressure charger, incident bar, transmission bar, cylinder, pressure chamber, molecular velocity screening plant, axial compression charger and test macro, described confined pressure charger for placing test block is arranged on the middle part of bracing frame, incident bar and transmission bar are in bracing frame, and incident bar and transmission bar are arranged in the left and right sides of confined pressure charger.The right-hand member of described incident bar and the left end of transmission bar stretch into confined pressure charger, and the left end of incident bar is configured with vertical baffle plate, and described axial compression charger is fixed on bracing frame right-hand member.Described pressure chamber is positioned at the left side of bracing frame, and the left end of pressure chamber is connected with cylinder by molecular velocity screening plant, and pressure chamber is provided with drift near the inside of right-hand member, has interval between the right side of pressure chamber and baffle plate.Described test macro one end connects the outer wall of incident bar, and the other end connects the outer wall of transmission bar.
Preferably, described test macro comprises foil gauge, wave filter and oscillograph, foil gauge has two, and be separately positioned on the outer wall of incident bar and transmission bar, foil gauge on incident bar is connected with wave filter by wire, wave filter is connected with oscillograph by wire, and oscillograph is also connected with the foil gauge on transmission bar by wire.
Preferably, described wave filter comprises low-pass filter, Hi-pass filter and bandpass filter, and low-pass filter, Hi-pass filter are connected with the foil gauge on incident bar by wire one end afterwards with bandpass filter parallel connection, and one end is connected with oscillograph.
Preferably, described molecular velocity screening plant one end and cylinder are socketed, and the other end and pressure chamber are socketed.
Preferably, the axis of described incident bar, transmission bar and drift is identical, and on same straight line.
By adopting preceding solution, Advantageous Effects of the present utility model is: in the molecular velocity screening plant of novel Hopkinson bar, the rotating speed of disk can regulate.After determining to produce the gas molecular velocities of different stress wave, just adjustable disc rotation speed, screening gas molecule, forms specific stress wave after making drift impingement baffles after incident bar, can study separately the impact that stress wave of different nature destroys coal petrography composite sample.The wave filter connected in novel Hopkinson bar circuit can be changed, to there is the bandpass filter of different center frequency and have in the low pass of different cutoff frequency, high pass filter filters device line attachment in parallel, effective filtering is carried out to the frequency beyond the frequency of characteristic frequency in power lead or this frequency, oscillograph shows specific waveform, to study waveform and the feature of stress wave.
Accompanying drawing explanation
Fig. 1 is the structural principle schematic diagram of a kind of novel Hopkinson bar of the utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in detail:
Composition graphs 1, a kind of novel Hopkinson bar, comprise bracing frame 1, confined pressure charger 2, incident bar 3, transmission bar 4, cylinder 5, pressure chamber 6, molecular velocity screening plant 7, axial compression charger 8 and test macro, described confined pressure charger 2 for placing test block is arranged on the middle part of bracing frame 1, incident bar 3 and transmission bar 4 are in bracing frame 1, incident bar 3 and transmission bar 4 are arranged in the left and right sides of confined pressure charger 2, described incident bar 3 is identical with the axis of transmission bar 4, and on same straight line.The right-hand member of described incident bar 3 and the left end of transmission bar 4 stretch into confined pressure charger 2, and the left end of incident bar 3 is fixedly installed vertical baffle plate 11, and described axial compression charger 8 is fixed on the right-hand member of bracing frame 1, and the left end of axial compression charger 8 withstands transmission bar 4.
Described pressure chamber 6 is positioned at the left side of bracing frame 1, the left end of pressure chamber 6 is connected with cylinder 5 by molecular velocity screening plant 7, molecular velocity screening plant 7 one end and cylinder 5 are socketed, the left end of the other end and pressure chamber 6 is socketed, molecular velocity screening plant 7 is closely socketed with cylinder 5 and pressure chamber 6, ensure leakproofness, prevent gas molecule from revealing.The molecule that gas molecule in cylinder 5 meets certain speed after molecular velocity screening plant 7 enters in pressure chamber 6, described pressure chamber 6 is provided with drift 9 near the inside of right-hand member, have interval between the right side of pressure chamber 6 and baffle plate 11, the gas push drift 9 in pressure chamber 6 moves right the baffle plate 11 clashing into and be arranged on incident bar 3 left end.Be subject to the incident bar 3 of stress wave activity to the sample extruding being arranged at confined pressure charger 2, the axial stress that incident bar 3 is subject to is by sample compression transmission bar 4, axial compression charger 8 simultaneously on the right side of transmission bar 4 will apply reacting force to it, and incident bar 3 and transmission bar 4 axially because of pressurized, Light deformation will occur along it.
Described test macro comprises foil gauge 10, wave filter 12 and oscillograph 13, foil gauge 10 has two, be fixedly installed on the outer wall of incident bar 3 and transmission bar 4 respectively, the foil gauge 10 be arranged on incident bar 3 outer wall is connected with wave filter 12 by wire, wave filter 12 is connected with oscillograph 13 by wire, and oscillograph 13 is also connected with the foil gauge 10 be arranged on transmission bar 4 outer wall by wire.Wave filter 12 comprises low-pass filter 14, Hi-pass filter 15 and bandpass filter 16, and low-pass filter 14, Hi-pass filter 15 are connected with the foil gauge 10 on incident bar 3 by wire one end with after bandpass filter 16 parallel connection, and one end is connected with oscillograph 13.
Molecular velocity screening plant 7 and wave filter 12 can individually work, namely when the gas molecule of molecular velocity screening plant to certain speed screens, wave filter 12 can fail, and when wave filter 12 pairs of characteristic frequency carry out filtering, molecular velocity screening plant 7 can fail.Screened by the qualified gas molecule in Molecular regulator speed screening plant 7 pairs of cylinders, can specific stress wave be formed.By changing the doublet of wave filter 12, effective filtering is carried out to the frequency beyond the frequency of characteristic frequency in power lead or this frequency, specific waveform can be shown, the impact that stress wave of different nature destroys coal petrography composite sample can be studied separately on oscillograph 13.
Certainly; above-mentioned explanation is not to restriction of the present utility model; the utility model is also not limited in above-mentioned citing, the change that those skilled in the art make in essential scope of the present utility model, remodeling, interpolation or replacement, also should belong to protection domain of the present utility model.
Claims (5)
1. a novel Hopkinson bar, comprise bracing frame, confined pressure charger, incident bar, transmission bar, cylinder, pressure chamber, molecular velocity screening plant, axial compression charger and test macro, it is characterized in that, described confined pressure charger for placing test block is arranged on the middle part of bracing frame, incident bar and transmission bar are in bracing frame, and incident bar and transmission bar are arranged in the left and right sides of confined pressure charger; The right-hand member of described incident bar and the left end of transmission bar stretch into confined pressure charger, and the left end of incident bar is configured with vertical baffle plate, and described axial compression charger is fixed on bracing frame right-hand member; Described pressure chamber is positioned at the left side of bracing frame, and the left end of pressure chamber is connected with cylinder by molecular velocity screening plant, and pressure chamber is provided with drift near the inside of right-hand member, has interval between the right side of pressure chamber and baffle plate; Described test macro one end connects the outer wall of incident bar, and the other end connects the outer wall of transmission bar.
2. the novel Hopkinson bar of one according to claim 1, it is characterized in that, described test macro comprises foil gauge, wave filter and oscillograph, foil gauge has two, and be separately positioned on the outer wall of incident bar and transmission bar, foil gauge on incident bar is connected with wave filter by wire, and wave filter is connected with oscillograph by wire, and oscillograph is also connected with the foil gauge on transmission bar by wire.
3. the novel Hopkinson bar of one according to claim 2, it is characterized in that, described wave filter comprises low-pass filter, Hi-pass filter and bandpass filter, low-pass filter, Hi-pass filter are connected with the foil gauge on incident bar by wire one end afterwards with bandpass filter parallel connection, and one end is connected with oscillograph.
4. the novel Hopkinson bar of one according to claim 1, is characterized in that, described molecular velocity screening plant one end and cylinder are socketed, and the other end and pressure chamber are socketed.
5. the novel Hopkinson bar of one according to claim 1, is characterized in that, the axis of described incident bar, transmission bar and drift is identical, and on same straight line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520469736.3U CN204789116U (en) | 2015-07-02 | 2015-07-02 | Novel hopkinson bar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520469736.3U CN204789116U (en) | 2015-07-02 | 2015-07-02 | Novel hopkinson bar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204789116U true CN204789116U (en) | 2015-11-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520469736.3U Expired - Fee Related CN204789116U (en) | 2015-07-02 | 2015-07-02 | Novel hopkinson bar |
Country Status (1)
| Country | Link |
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| CN (1) | CN204789116U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106918515A (en) * | 2017-02-14 | 2017-07-04 | 中国人民解放军理工大学 | Particulate matter one-dimension stress wane attenuation effect experimental rig |
| CN110057696A (en) * | 2018-12-18 | 2019-07-26 | 天津大学 | A kind of split hopkinson press bar with energy absorption device analog in-situ stress environment |
| WO2021017242A1 (en) * | 2019-08-01 | 2021-02-04 | 深圳大学 | Temperature-pressure-osmotic pressure coupled two-way electromagnetic loading three-axis shpb test system |
| WO2021017241A1 (en) * | 2019-08-01 | 2021-02-04 | 深圳大学 | Electromagnetic loading triaxial shpb device and test method under coupling of osmotic pressure and static pressure |
| US20210293679A1 (en) * | 2019-03-19 | 2021-09-23 | Henan Polytechnic University | Vertical hopkinson pressure bar test device and test method |
| US20220128442A1 (en) * | 2019-08-01 | 2022-04-28 | Shenzhen University | Thermal-stress-pore pressure coupled electromagnetic loading triaxial hopkinson bar system and test method |
-
2015
- 2015-07-02 CN CN201520469736.3U patent/CN204789116U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106918515A (en) * | 2017-02-14 | 2017-07-04 | 中国人民解放军理工大学 | Particulate matter one-dimension stress wane attenuation effect experimental rig |
| CN110057696A (en) * | 2018-12-18 | 2019-07-26 | 天津大学 | A kind of split hopkinson press bar with energy absorption device analog in-situ stress environment |
| CN110057696B (en) * | 2018-12-18 | 2022-01-28 | 天津大学 | Take energy-absorbing device can simulate normal position stress environment's disconnect-type hopkinson depression bar |
| US20210293679A1 (en) * | 2019-03-19 | 2021-09-23 | Henan Polytechnic University | Vertical hopkinson pressure bar test device and test method |
| US11747249B2 (en) * | 2019-03-19 | 2023-09-05 | Henan Polytechnic University | Vertical Hopkinson pressure bar test device and test method |
| WO2021017242A1 (en) * | 2019-08-01 | 2021-02-04 | 深圳大学 | Temperature-pressure-osmotic pressure coupled two-way electromagnetic loading three-axis shpb test system |
| WO2021017241A1 (en) * | 2019-08-01 | 2021-02-04 | 深圳大学 | Electromagnetic loading triaxial shpb device and test method under coupling of osmotic pressure and static pressure |
| US20220128442A1 (en) * | 2019-08-01 | 2022-04-28 | Shenzhen University | Thermal-stress-pore pressure coupled electromagnetic loading triaxial hopkinson bar system and test method |
| US11921088B2 (en) | 2019-08-01 | 2024-03-05 | Shenzhen University | Thermal-stress-pore pressure coupled electromagnetic loading triaxial Hopkinson bar system and test method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151118 Termination date: 20160702 |
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| CF01 | Termination of patent right due to non-payment of annual fee |