CN103900782A - Typical flexible member multi-collision test table - Google Patents
Typical flexible member multi-collision test table Download PDFInfo
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- CN103900782A CN103900782A CN201410155114.3A CN201410155114A CN103900782A CN 103900782 A CN103900782 A CN 103900782A CN 201410155114 A CN201410155114 A CN 201410155114A CN 103900782 A CN103900782 A CN 103900782A
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Abstract
The invention discloses a typical flexible member multi-collision test table. The typical flexible member multi-collision test table mainly comprises a test beam, a fixing device of the test beam, atypical flexible member such as a rod and a ball, a motion constraint device of the typical flexible member, a measuring device for beam surface micro displacement changes, a multi-collision measuring circuit and a laser vibration measurer, wherein the multi-collision measuring circuit and the laser vibration measurer are independent from a test table body structure. When the typical flexible member such as the rod and the ball collides with the test beam, test data are collected through a detecting device, and a multi-collision behavior in the low-speed collision process of the typical flexible members is studied. The members of the test table are located accurately, the test table works stably, and the test repeating accuracy is high; the test table has the advantages of being simple in structure, easy to adjust and the like.
Description
Technical field:
The present invention relates to a kind of test unit that excites time collision phenomenon, especially a kind of horizontal low speed collision testing table that produces time collision phenomenon while making typical flexible member collision.
Background technology:
In modern industry, widespread use that accuracy requirement is high, running speed is fast, the complicated flexiblesystem of deft design.Between the each member of flexiblesystem, can inevitably there is repeatedly low intensive elastoplasticity time collision phenomenon.Such elastoplasticity time collision phenomenon is often through the whole service course of work, and conventionally can cause wearing and tearing, fatigue, destruction, high-amplitude vibration and the mechanical noise etc. of structure.Running precision that not only can deteriorated system, and can reduce the controllability of system and the reliability of long-time running, therefore in the urgent need to the inferior collision phenomenon occurring between flexible member is carried out to deep analysis and research.In existing known testing table, not for the testing table of typical flexible member elastoplasticity time impact test research.
Summary of the invention:
The object of this invention is to provide a kind of typical flexible member time bump testing machine, the elastoplasticity time collision phenomenon inspiring for studying typical flexible member in the time that low speed level is collided.
Typical flexible member provided by the present invention time bump testing machine comprises test beam 7 and stationary installation, typical flexible member check bar 1 and kinematic constraint device thereof, changes the laser displacement sensor 12 of measuring, inferior collision metering circuit 17, laser vibration measurer 16 and base 6 for beam surface micro-displacement; In described collision metering circuit, one end of circuit is connected on described test beam 7, and the other end of described circuit connects typical flexible member check bar 1; Described laser vibration measurer 16 and the homonymy of described typical flexible member bar 1 in described test beam 7, described laser displacement sensor 12 is positioned at the opposite side of described test beam 7.
Check bar 1 in described typical flexible member check bar 1 and kinematic constraint device thereof is suspended in suspension plate 4 by fine rule 2, described suspension plate 4 is bolted on swinging mounting 3, and the single pendulum formal constraint telecontrol equipment that described fine rule 2, suspension plate 4 and swinging mounting 3 are formed is fixed on described base 6.When the typical flexible member such as bar, ball freely swings to minimum point, velocity reversal, in level, is realized the level collision of the typical flexible member such as bar, ball to test beam.
Described laser displacement sensor 12 is arranged on sensor platform 11, and described sensor platform 11 is bolted on sensor adjustment rack 14, and described sensor adjustment rack 14 is fixed on described base 6.
The measurement that test beam surface micro-displacement is changed, is used laser displacement sensor 12, and by the adjustment to sensor platform, the different test points that can be collided from test beam 7 match, and completes the measurement that test beam surface micro-displacement is changed; Inferior collision metering circuit 17, one end of circuit is connected on test beam 7, the other end of circuit is connected on check bar 1, by the make-and-break time course of circuit, and the duration of time collision in the inferior collision frequency of the typical members such as research bar, ball and test beam and collision process.The test figures such as displacement, speed and the acceleration in the typical flexible member collision process such as laser vibration measurer 16 sounding rods, ball, with the homonymy of the typical flexible member such as bar, ball in test beam.
The testing table of the present invention's design, registration between member, working stability, experiment repeatable accuracy is high; Simple in structure, be easy to adjust the inferior collision behavior under the different collision parameters of energy authentic simulation typical case flexible member.
Brief description of the drawings:
Fig. 1 is test platform structure schematic diagram of the present invention;
Fig. 2 is testing table side-looking structural representation of the present invention;
Fig. 3 is testing table workflow schematic diagram of the present invention;
Fig. 4 is time collision metering circuit figure in testing table of the present invention.
In figure: 1: check bar; 2: fine rule; 3: swinging mounting; 4: suspension plate; 5: transverse shifting groove; 6: base; 7: test beam; 8: clamping plate; 9: foot rest; 10: groove; 11: sensor platform; 12: laser displacement sensor; 13: sensor adjustment rack shifting chute; 14: sensor adjustment rack; 15: fixed mount; 16: laser vibration measurer; 17: inferior collision metering circuit.
Embodiment:
Different typical flexible members and the test beam of different fixed forms, collision between the two, all likely goes out occurrence collision behavior, and present beam under bar and freely-supported mode collides as example, and the testing table course of work is described.Adjust test unit, while making check bar freely swing to minimum point, with test beam collision, then, through outside proving installation, obtain relevant test figure, last, test figure is analyzed to the behavior of research time collision.The schematic flow sheet of concrete test is shown in Fig. 3.
In Fig. 1, first, check bar 1 is suspended between a pair of suspension plate 3 by fine rule 2, and then, suspension plate 4 is bolted on a pair of swinging mounting 3, last, by after above three's assembling, is fixed in the transverse shifting groove 5 on base 6.Wherein, suspension plate 4 can be by the degree of tightness of bolt, carries out longitudinally small adjustment, and can make check bar 1 move to minimum point time, check bar 1, just in horizontality, carries out level collision with test beam 7; The restraint device of check bar 1, be fixed by bolts in the transverse shifting groove 5 on base 6, by adjusting the fixed position of restraint device, can change the position of collision of check bar 1 and test beam 7, thereby study along test beam length direction the impact on inferior collision phenomenon when position of collision changes.
See Fig. 1, the support pattern of test beam 7 is freely-supported fixed forms, the arc groove that test beam 7 two ends have, match with the outer convex arc surface on a pair of clamping plate 8, the test beam 7 that forms freely-supported mode, is then fixed on clamping plate 8 on foot rest 9 by dormant bolt, finally by the stationary installation of whole free beam 7, be connected with base 6 bolts by foot rest 9, be fixed on base 6.
In Fig. 2, laser displacement sensor 12 is placed on sensor platform 11, and the side of sensor platform 11 has groove 13, by the degree of tightness of bolt, adjust the height of sensor platform 11, guarantee that laser spot that laser displacement sensor 12 sends is just to test point on test beam 7.Sensor platform 11 can also be in the groove of sensor adjustment rack 13 10, transverse shifting, the impact test can coordinate different position of collision like this time.Finally, the single unit system of measuring the surperficial micro-displacement variation of beam 7, by fixed mount 15, is arranged on base 6.
In Fig. 4, some by direct current alkaline battery, 120 Ω resistance, high-speed data acquistion system, wire, form loop with bar, beam, form and time collide metering circuit 17.One end of circuit is connected on bar 1, the other end is connected on test beam 7, collision and detachment process are the make and break process of circuit, by the make-and-break time course of this circuit, and the duration in inferior collision frequency and the inferior collision process of the typical members such as research bar, ball 1 and beam 7.
In Fig. 1, laser vibration measurer 16 and check bar 1 the same side in test beam 7, can measure the data such as speed, acceleration, displacement of the bar 1 of motion in 0-10m/s velocity range, laser vibration measurer has professional bracing frame, can be independent of testing table, with bar 1 the same side in test beam 7, can realize remote non-cpntact measurement.
To sum up, check bar 1 is moved to specified altitude assignment (for obtaining particular crash speed), then discharge, under the effect of bar 1 restraint device, while making bar 1 move to minimum point, just in horizontality, carry out level collision with test beam 7.By laser displacement sensor 12, measure the displacement signal of test beam surface test point in collision process; By inferior collision metering circuit 17, measure test beam 7 and the inferior collision frequency of bar and the duration of inferior collision in collision process; By peripheral hardware laser vibration measurer 16, measure speed, the displacement of check bar 1 in collision process, the signals such as acceleration; Above-mentioned experimental data is all carried out record by high-speed data acquistion system.Collide in contact process both real-time displacements by contrast test bar 1 and test beam 7, then in conjunction with both geometry site, for studying deformation process and the Changing Pattern in plasticity hole on collision process central sill.
Testing table provided by the invention can be stablized, extract accurately the research time required test figure of collision phenomenon, thereby carries out the research of time collision behavior.A kind of example is just used in this explanation, and operating process and the principle of work of the typical flexible member time bump testing machine of invention is described, invention comprises other test unit expansion and develops.
Claims (4)
1. typical flexible member time bump testing machine, is characterized in that this testing table comprises test beam (7) and stationary installation, typical flexible member check bar (1) and kinematic constraint device thereof, laser displacement sensor (12), inferior collision metering circuit (17), laser vibration measurer 16 and base 6 for beam surface micro-displacement measure of the change; In described collision metering circuit (17), one end of circuit is connected on described test beam 7, and in described collision metering circuit (17), the other end of circuit connects typical flexible member check bar bar (1); Described laser vibration measurer (16) and the homonymy of described typical flexible member check bar bar (1) in described test beam (7), described laser displacement sensor (12) is positioned at the opposite side of described test beam (7).
2. typical flexible member time bump testing machine according to claim 1, it is characterized in that test beam (7) two ends in described test beam (7) and stationary installation thereof clamp by clamping plate (8), described clamping plate (8) are bolted on foot rest (9), it is upper that described foot rest (9) is fixed on described base (6), and described test beam (7) thickness direction is in level.
3. typical flexible member time bump testing machine according to claim 1, it is characterized in that the check bar (1) in described typical flexible member check bar (1) and kinematic constraint device thereof is suspended in suspension plate (4) by fine rule (2), it is upper that described suspension plate (4) is bolted on swinging mounting (3), and the single pendulum formal constraint telecontrol equipment of described fine rule (2), suspension plate (4) and swinging mounting (3) composition is fixed on described base (6).
4. typical flexible member time bump testing machine according to claim 1, it is characterized in that described laser displacement sensor (12) is arranged on sensor platform (11), it is upper that described sensor platform (11) is bolted on sensor adjustment rack (14), and described sensor adjustment rack (14) is fixed on described base (6).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410155114.3A CN103900782A (en) | 2014-04-17 | 2014-04-17 | Typical flexible member multi-collision test table |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410155114.3A CN103900782A (en) | 2014-04-17 | 2014-04-17 | Typical flexible member multi-collision test table |
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| CN103900782A true CN103900782A (en) | 2014-07-02 |
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| CN201410155114.3A Pending CN103900782A (en) | 2014-04-17 | 2014-04-17 | Typical flexible member multi-collision test table |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108106990A (en) * | 2017-12-25 | 2018-06-01 | 中国船舶重工集团公司第七〇九研究所 | A kind of flexible structure elastoplasticity time collision experiment platform |
| CN113358318A (en) * | 2021-07-02 | 2021-09-07 | 中国空气动力研究与发展中心低速空气动力研究所 | Cable collision detection method, device, equipment and storage medium |
Citations (1)
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| CN200944077Y (en) * | 2006-03-24 | 2007-09-05 | 唐升棣 | Air-actuated shock and bump testing device |
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2014
- 2014-04-17 CN CN201410155114.3A patent/CN103900782A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200944077Y (en) * | 2006-03-24 | 2007-09-05 | 唐升棣 | Air-actuated shock and bump testing device |
Non-Patent Citations (5)
| Title |
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| JILIN YU: "Numerical simulation of a clamped beam under impact loading", 《COMPUTER & STRUCTURES》, vol. 32, no. 2, 31 December 1989 (1989-12-31), pages 281 - 293 * |
| 戚晓利 等: "多次弹塑性撞击实验系统的设计与数值仿真", 《南京理工大学学报》, vol. 36, no. 2, 30 April 2012 (2012-04-30) * |
| 朱焜: "柔性圆柱杆接触碰撞实验研究", 《中国优秀硕士学位论文全文数据库 基础科学辑》, 15 April 2010 (2010-04-15) * |
| 李敏 等: "球杆碰撞问题的数值分析和实验研究", 《北京航空航天大学学报》, vol. 27, no. 1, 28 February 2001 (2001-02-28), pages 62 - 65 * |
| 金栋平 等: "两柔性梁碰撞振动类型的实验研究", 《实验力学》, vol. 14, no. 2, 30 June 1999 (1999-06-30), pages 129 - 135 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108106990A (en) * | 2017-12-25 | 2018-06-01 | 中国船舶重工集团公司第七〇九研究所 | A kind of flexible structure elastoplasticity time collision experiment platform |
| CN113358318A (en) * | 2021-07-02 | 2021-09-07 | 中国空气动力研究与发展中心低速空气动力研究所 | Cable collision detection method, device, equipment and storage medium |
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