CN102853981A - Experimental device for simulating large-amplitude vibration system - Google Patents
Experimental device for simulating large-amplitude vibration system Download PDFInfo
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- 238000012360 testing method Methods 0.000 claims abstract description 16
- 238000006073 displacement reaction Methods 0.000 claims description 58
- 229910000831 Steel Inorganic materials 0.000 claims description 16
- 239000010959 steel Substances 0.000 claims description 16
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- 238000003466 welding Methods 0.000 claims description 4
- 238000003556 assay Methods 0.000 claims 6
- 238000005259 measurement Methods 0.000 abstract description 5
- 238000004891 communication Methods 0.000 abstract description 2
- 238000010276 construction Methods 0.000 abstract 1
- 238000002474 experimental method Methods 0.000 description 12
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- 238000010168 coupling process Methods 0.000 description 5
- 238000005859 coupling reaction Methods 0.000 description 5
- 238000013016 damping Methods 0.000 description 4
- 238000007667 floating Methods 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
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- 238000013461 design Methods 0.000 description 2
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- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
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- 239000000725 suspension Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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- 230000005288 electromagnetic effect Effects 0.000 description 1
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- 239000000463 material Substances 0.000 description 1
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Abstract
The invention discloses an experimental device for simulating a large-amplitude vibration system. The device comprises a fixing support body structure, a horizontal vibration testing platform, a spring connection device, a loading system and a measurement device. The device is small in volume, simple to operate, convenient to use, install and disassemble, low in construction cost and usage expense and suitable to industries such as aviation, space flight, sea, communication, electron and cars.
Description
Technical Field
The invention relates to an experimental simulation device, in particular to an experimental device capable of simulating a large-amplitude vibration system.
Background
Large amplitude vibration systems are often encountered in practical engineering problems such as floating structures in marine engineering, aerospace, moving parts in machinery and instruments and meters. Whether the existing system is optimized or innovative research and design are developed, experimental simulation is required. For example, with the progress of ocean development, ocean floating structures are beginning to find more applications. In order to ensure that the marine floating structure has good applicability and safety, a vibration experiment with large motion amplitude is generally carried out on the marine floating structure, and the experiment simulation is usually carried out in a marine engineering water pool at present. However, such experimental pools are extremely small in number and expensive in experimental and measurement, and are therefore often used in a validation experiment where the project design is initially determined, or a small number of comparative experiments with relatively well-defined theoretical predictions. The similar situation occurs in other engineering and research fields, which is inconvenient for finding new phenomena and developing principle experiments through experiments at any time in the process of exploratory research and development.
Therefore, the invention is urgently needed to invent an experimental device which is universal, convenient and low in cost and can simulate a dynamic system for large-amplitude motion under the action of any given external load.
Disclosure of Invention
Aiming at the problem that a simple and universal experiment simulation device suitable for a large-amplitude vibration system is lacked at present, the invention provides an experiment device capable of simulating the large-amplitude vibration system so as to realize experiment simulation and measurement of large-amplitude motion response of the engineering vibration system under the action of external load.
In order to solve the above problems, the present invention provides an experimental apparatus capable of simulating a large amplitude vibration system, comprising: the device comprises a fixed support main body structure, a horizontal vibration test bed, a spring connecting device, a loading system and measuring equipment; wherein,
the horizontal vibration test bed is positioned in the middle position above the main body structure of the fixed support and comprises a supporting device, a horizontal sliding table and a vibration table ox head, wherein the supporting device is positioned above the main body structure of the fixed support, the horizontal sliding table is suspended above the supporting device, and the vibration table ox head is connected with one end of the horizontal sliding table and is connected with the loading system;
the spring connecting device comprises a spring connecting end fixing support, a fine adjustment screw rod connecting clamp, a screw rod, a spring and a spring connecting clamp; the number of the spring connecting end fixing supports is four, the four spring connecting end fixing supports are respectively installed at four corners of a main body structure of the fixing support, fine adjustment screw rod connecting clamps are installed on the spring connecting end fixing supports, screw rods are installed on the fine adjustment screw rod connecting clamps, one end of each spring is connected with the corresponding screw rod, the other end of each spring is connected with the corresponding spring connecting clamp, and the spring connecting clamps are installed on the horizontal sliding table;
the loading system comprises a loading device and a loading device base, the loading device base is positioned on the main body structure of the fixed support, and the loading device is positioned on the loading device base and connected with the ox head of the vibrating table;
and the measuring equipment is connected with the horizontal sliding table and is used for measuring experimental data such as force, acceleration, displacement and the like.
Preferably, the experimental device further has the following characteristics:
the measuring apparatus includes: force transducer and slip table ox head's keysets, force transducer is located between shaking table ox head and the loading device, through the keysets with shaking table ox head links to each other.
Preferably, the experimental device further has the following characteristics:
the measuring apparatus further includes: and the 2 acceleration sensors are all positioned on the horizontal sliding table.
Preferably, the experimental device further has the following characteristics:
the measuring apparatus further includes: the displacement sensor positioning device comprises a displacement sensor, a displacement sensor positioning support, a displacement sensor connecting piece, a displacement sensor adapter and an adjustable displacement sensor connecting clamp, wherein the displacement sensor positioning support is positioned on a main body structure of a fixed support, one end of the displacement sensor is installed on the displacement sensor positioning support through the displacement sensor connecting piece, and the other end of the displacement sensor is connected to the adjustable displacement sensor connecting clamp through the displacement sensor adapter; the adjustable displacement sensor connecting clamp is installed on the spring connecting clamp, a long hole is formed in the spring connecting clamp, and the adjustable displacement sensor connecting clamp can slide on the long hole, so that leveling and centering are achieved.
Preferably, the experimental device further has the following characteristics:
the main structure of the fixed support is formed by welding two longitudinal channel steels and three cross beams, two cross beams in the three cross beams are used for installing the loading device base, and the other cross beam is used for installing the displacement sensor positioning support.
Preferably, the experimental device further has the following characteristics:
the longitudinal channel steel is provided with equidistant screw holes for mounting the spring connecting end fixing support, and the centering and leveling of the whole equipment are facilitated.
Preferably, the experimental device further has the following characteristics:
the loading device base is provided with a plurality of rows of equidistant screw holes, so that the loading device with different ranges can be used, and meanwhile, the loading device base is also suitable for mounting springs with different lengths and stiffness.
The invention has the following advantages:
(1) the experimental device is connected with the horizontal sliding table through the specially designed adjustable bearing and fixing frame, various clamps, special connecting pieces and the like and the springs, so that the horizontal sliding table which is originally only used for providing a vibration environment for a tested object is changed into one of tested objects, and the dynamic response of a large-amplitude motion system can be simulated under the action of any given external load and with different frequencies and different amplitudes.
(2) The experimental device overcomes the defect that the horizontal vibration test bed is lack of self rigidity. Four extension springs connected with the horizontal sliding table are used for increasing the rigidity of the horizontal vibration test bed; the four springs are connected with the bracket through screw rods, and the suspension points of the springs can be adjusted at any time so as to ensure that the tension of each spring is equal. Under the condition that all the springs are kept in a stretching state, the horizontal sliding table can do reciprocating motion with larger amplitude. The experimental device is easy and simple to adjust the rigidity, and the purpose of changing the rigidity can be achieved only by replacing springs with different rigidities.
(3) After the experimental device is used, the horizontal vibration test can be carried out under the condition that the original model and the experimental model strictly meet the similarity principle. Besides the platform rigidity adjusting mode in the step (2), the weight of the horizontal sliding table can be adjusted at any time by adding the mass block. The damping of the platform structure can be adjusted greatly by adjusting the levels and vertical positions of the four springs and the pre-extension amount, and then the four cushion blocks on the two sides of the horizontal sliding table are utilized to carry out fine adjustment.
(4) The loading device can be replaced according to the experiment requirement, and the experiment device can simulate an engineering vibration system which can move greatly at different frequencies and different amplitudes under the action of any given external load. For the difference of different loading devices in height and width, the loading devices, the horizontal springs and the vibration test bed can be centered and adjusted to be horizontal by utilizing various sliding grooves and screw rods on the base and the support.
(5) The experimental device is small in size, easy to disassemble and assemble and convenient to flexibly modify according to different research needs. The device is provided with a displacement sensor, a force sensor and an acceleration sensor, and when certain performances in a large-amplitude motion power system are optimized and evaluated, the device is easier to operate compared with the traditional simulation device.
(6) The experimental device mainly takes standard channel steel and a thick steel plate as raw materials. In the aspect of the manufacturing cost of the experimental device, the experimental device is far lower than the traditional large-amplitude motion simulation system (such as an ocean engineering water pool), and the operation cost of the experiment is quite low compared with the operation cost of the experiment.
Drawings
FIG. 1 is a side view of an experimental apparatus capable of simulating a large amplitude vibration system according to an embodiment of the present invention;
FIG. 2 is a top view of an experimental apparatus capable of simulating a large amplitude vibration system according to an embodiment of the present invention;
wherein:
1-fine setting screw rod coupling jig, 2-fixed bolster major structure, 3-loading device base, 4-shaking table ox head, 5-slip table location briquetting, 6-spring coupling jig, 7-strutting arrangement, 8-spring coupling end fixed bolster, 9-screw rod, 10-displacement sensor, 11-acceleration sensor, 12-displacement sensor locating support, 13-force sensor, 14-loading device, 15-horizontal slip table, 16-spring, 17-vertical channel-section steel, 18-crossbeam, 19 the screw on the vertical channel-section steel, 20-the keysets of force sensor and slip table ox head, 21-displacement sensor connecting piece, 22-displacement sensor adapter, 23-adjustable displacement sensor coupling jig.
Detailed Description
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
The experimental device comprises a specially designed adjustable bearing and fixing framework, a plurality of clamps, a special connecting piece and the like, and is connected with the horizontal sliding table through a spring. The components are flexibly combined with the horizontal sliding table to form a universal experimental device capable of simulating a large-amplitude motion power system.
If the experimental device needs to realize the simulation of a large-amplitude motion power system, the following five points are met: the horizontal sliding table can carry out reciprocating motion with larger amplitude under the action of bearing any given external load; secondly, horizontal rigidity is added to the horizontal sliding table, and the rigidity can be adjusted; thirdly, the damping of the sliding table can be adjusted in a larger range; fourthly, the quality of the horizontal sliding table is variable; and fifthly, the device can measure key mechanical parameters such as force, acceleration and displacement. The above points can be all completed by the experimental device.
As shown in fig. 1, the experimental apparatus of the present invention comprises: the device comprises a fixed support main body structure 2, a horizontal vibration test bed, a spring connecting device, a loading system and measuring equipment; wherein:
horizontal vibration test bench is located intermediate position on the fixed bolster major structure 2, including slip table location briquetting 5, strutting arrangement 7, horizontal slip table 15 and shaking table ox head 4, strutting arrangement 7 is located on the fixed bolster major structure 2, slip table location briquetting 5 is used for pushing down strutting arrangement's four legs, horizontal slip table 15 suspend in on strutting arrangement 7, shaking table ox head 4 with horizontal slip table 15's one end links to each other, and with loading system links to each other.
The horizontal vibration test bed is generally used for finding early faults, simulating environments of electricians, electronics, automobile parts and other products and goods related to transportation in the transportation process, detecting the vibration resistance of the products or examining the strength and fatigue of the structure under actual working conditions, and has accurate test results and high reliability. The horizontal sliding table 15 in the horizontal vibration test bed is generally made of an aluminum magnesium alloy material with low density and light weight. The horizontal slide table 15 can be suspended above the support device 7 by electromagnetic effect or oil pressure, in this embodiment the support device 7 is a vibrating table oil tank.
The spring connecting device comprises a spring connecting end fixing support 8, a fine adjustment screw rod connecting clamp 1, a screw rod 9, a spring 16 and a spring connecting clamp 6; four spring connecting end fixing supports 8 are respectively arranged at four corners of the fixing support main body structure 2, a fine adjustment screw rod connecting clamp 1 is arranged on each spring connecting end fixing support 8, a screw rod 9 is arranged on each fine adjustment screw rod connecting clamp 1, one end of each spring 16 is connected with the corresponding screw rod 9, the other end of each spring is connected with the corresponding spring connecting clamp 6, and each spring connecting clamp 6 is arranged on the corresponding horizontal sliding table 15; a vertical hole groove is formed in the spring connecting end fixing support 8, so that the level of the spring 16 can be ensured through vertical fine adjustment of the fine adjustment screw rod connecting clamp 1; the screw 9 is installed in the horizontal direction, and the length of the screw is adjusted to control the distance between the spring hanging points.
The loading system comprises a loading device 14 and a loading device base 3, wherein the loading device base 3 is positioned on the fixed support main body structure 2, and the loading device 14 is positioned on the loading device base 3 and is connected with the vibrating table ox head 4; the loading device base 3 is provided with a plurality of rows of equidistant screw holes (not shown in the figure) so as to facilitate the use of loading devices 14 with different measuring ranges.
The measuring equipment with horizontal slip table links to each other for experimental data such as measurement power, acceleration, displacement include: the device comprises a force sensor 13, an adapter plate 20 of the force sensor and a sliding table ox head, an acceleration sensor 11, a displacement sensor 10, a displacement sensor positioning support 12, a displacement sensor connecting piece 21, a displacement sensor adapter 22 and an adjustable displacement sensor connecting clamp 23, wherein the force sensor 13 is positioned between the vibrating table ox head 4 and a loading device 14 and is connected with the vibrating table ox head 4 through the adapter plate 20; the number of the acceleration sensors 11 is two, and the two acceleration sensors are both located on the horizontal sliding table 15. The displacement sensor positioning bracket 12 is positioned on the fixed bracket main body structure 2, one end of the displacement sensor 10 is mounted on the displacement sensor positioning bracket 12 through the displacement sensor connecting piece 21, and the other end of the displacement sensor 10 is connected on the adjustable displacement sensor connecting clamp 23 through the displacement sensor adapter 22; the adjustable displacement sensor connecting clamp 23 is installed on the spring connecting clamp 6, a long hole is formed in the spring connecting clamp 6, and the adjustable displacement sensor connecting clamp 23 can slide on the long hole, so that leveling and centering are achieved.
The main structure 2 of the fixing support is formed by welding two longitudinal channel steels 17 and three cross beams 18, and the material can be standard channel steels (12.6). A horizontal vibration test bed is placed in the middle of two longitudinal channel steels, and equidistant screw holes 19 are formed in the longitudinal channel steels 17 and used for installing the spring connecting end fixing support 8. These screw holes can be used to adjust the position of four spring link end fixed bolster 8, make the interval between spring 16 and the screw rod 9 suspension point satisfy appointed elongation to satisfy slip table vibration amplitude range requirement. Three beams 18 are welded among the longitudinal channel steel 17, two beams of the three beams 18 are used for installing the loading device base 3, and the other beam is used for installing the displacement sensor positioning support 12.
When producing this experimental apparatus, preferred higher channel-section steel of intensity and steel sheet and guarantee that each face roughness after the welding is higher, the machining precision of all accessories of a whole set of experimental apparatus all will reach more than 0.5mm, and the screw position of beating on the device will guarantee 0.1 mm's high accuracy.
Before the experimental device is installed, the horizontal vibration test bed is arranged in the center of two bearing longitudinal channel steel 17 of the main body structure 2 of the fixed support. Firstly, mounting four spring connecting end fixing supports 8 and a fine tuning screw connecting clamp 1 according to the hanging point intervals corresponding to the rigidity of a spring 16; then, fixing the screw rod 9 on the fine adjustment screw rod connecting clamp 1, and tightly screwing the spring connecting clamp 6 on the horizontal sliding table 15 and the horizontal sliding table 15; finally, four springs 16 are hung on the horizontal sliding table 15, four hanging points on the horizontal sliding table 15 and four hanging points on the spring connecting end fixing support 8 are respectively leveled through fine adjustment of screws in the long hole grooves and the screw rods 9 on the fine adjustment screw rod connecting clamp 1, and the plane where the hanging points of the spring connecting end fixing support 8 are located must not be lower than the plane where the hanging points of the horizontal sliding table 15 are located. After the platform is leveled, the loading device 14 is fixed on the loading device base 3, and the height of the loading device base 3 is adjusted to enable the loading device 14 to be aligned with the vibrating table ox head 4, so that continuous and stable force loading signals are guaranteed.
When the experimental device works, the four sensors are preferably connected with the signal receiver, and ideal experimental results can be obtained through comprehensive analysis of the force signals, the displacement signals and the acceleration signals. When platform structure damping is not conform to the requirement, to hanging on the horizontal slip table 15 some and hanging on the spring coupling end fixed bolster 8 some horizontal plane difference of height's regulation can reach great range change structure damped effect, also can change the pre-extension volume of four springs through the fine setting screw rod, reach great amplitude change structure damped effect. In addition, in the preferred embodiment, four cushion blocks are installed below two sides of the horizontal sliding table, and the friction strength between the cushion blocks and the supporting device 7 is adjusted by finely adjusting the tightness between the cushion blocks and the horizontal sliding table, so as to increase or decrease the damping.
In conclusion, the experimental device can simulate the engineering vibration system which can move greatly at different frequencies and different amplitudes under the action of any given external load. The experimental device is easy to disassemble and assemble and convenient to flexibly adjust according to different research needs. The device can realize the experimental simulation and measurement of large-amplitude motion response of the engineering vibration system under the action of any external load by matching with a common sensor, and is suitable for industries such as aviation, aerospace, ocean, communication, electronics, automobiles and the like.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. An experimental device capable of simulating a large-amplitude vibration system, comprising: the device comprises a fixed support main body structure, a horizontal vibration test bed, a spring connecting device, a loading system and measuring equipment; wherein,
the horizontal vibration test bed is positioned in the middle position above the main body structure of the fixed support and comprises a supporting device, a horizontal sliding table and a vibration table ox head, wherein the supporting device is positioned above the main body structure of the fixed support, the horizontal sliding table is suspended above the supporting device, and the vibration table ox head is connected with one end of the horizontal sliding table and is connected with the loading system;
the spring connecting device comprises a spring connecting end fixing support, a fine adjustment screw rod connecting clamp, a screw rod, a spring and a spring connecting clamp; the number of the spring connecting end fixing supports is four, the four spring connecting end fixing supports are respectively installed at four corners of a main body structure of the fixing support, fine adjustment screw rod connecting clamps are installed on the spring connecting end fixing supports, screw rods are installed on the fine adjustment screw rod connecting clamps, one end of each spring is connected with the corresponding screw rod, the other end of each spring is connected with the corresponding spring connecting clamp, and the spring connecting clamps are installed on the horizontal sliding table;
the loading system comprises a loading device and a loading device base, the loading device base is positioned on the main body structure of the fixed support, and the loading device is positioned on the loading device base and connected with the ox head of the vibrating table;
and the measuring equipment is connected with the horizontal sliding table and is used for measuring experimental data such as force, acceleration, displacement and the like.
2. The assay device of claim 1,
the measuring apparatus includes: force transducer and slip table ox head's keysets, force transducer is located between shaking table ox head and the loading device, through the keysets with shaking table ox head links to each other.
3. The assay device of claim 2,
the measuring apparatus further includes: and the 2 acceleration sensors are all positioned on the horizontal sliding table.
4. The assay device of claim 3,
the measuring apparatus further includes: the displacement sensor positioning device comprises a displacement sensor, a displacement sensor positioning support, a displacement sensor connecting piece, a displacement sensor adapter and an adjustable displacement sensor connecting clamp, wherein the displacement sensor positioning support is positioned on a main body structure of a fixed support, one end of the displacement sensor is installed on the displacement sensor positioning support through the displacement sensor connecting piece, and the other end of the displacement sensor is connected to the adjustable displacement sensor connecting clamp through the displacement sensor adapter; the adjustable displacement sensor connecting clamp is installed on the spring connecting clamp, a long hole is formed in the spring connecting clamp, and the adjustable displacement sensor connecting clamp can slide on the long hole, so that leveling and centering are achieved.
5. The assay device of claim 1,
the main structure of the fixed support is formed by welding two longitudinal channel steels and three cross beams, two cross beams in the three cross beams are used for installing the loading device base, and the other cross beam is used for installing the displacement sensor positioning support.
6. The assay device of claim 5,
the longitudinal channel steel is provided with equidistant screw holes for mounting the spring connecting end fixing support, and the centering and leveling of the whole equipment are facilitated.
7. The assay device of claim 1,
the loading device base is provided with a plurality of rows of equidistant screw holes, so that the loading device with different ranges can be used, and meanwhile, the loading device base is also suitable for mounting springs with different lengths and stiffness.
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| CN103234726A (en) * | 2013-05-07 | 2013-08-07 | 清华大学 | High gravity field vibration adding device for huge marine centrifugal machine |
| CN103454054A (en) * | 2013-08-07 | 2013-12-18 | 中国科学院力学研究所 | Force control loading and layout variable vertical vibration experimental device |
| CN103743535A (en) * | 2013-12-16 | 2014-04-23 | 中国科学院力学研究所 | Large-amplitude translation/rotation-coupled vibration experiment device loaded under the control of force and torque |
| CN104748930A (en) * | 2015-04-13 | 2015-07-01 | 东北大学 | Piezoelectric high-frequency vibration system used for high-order vibration fatigue testing of small-size components |
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| CN105241627B (en) * | 2015-10-27 | 2019-01-25 | 上海航天精密机械研究所 | A kind of vibration test horizontal direction pressure balance auxiliary support apparatus |
| CN105606324A (en) * | 2016-03-15 | 2016-05-25 | 上海交通大学 | Vibration testing system based on vibration loading device, and method thereof |
| CN107300453A (en) * | 2017-06-30 | 2017-10-27 | 中国科学院长春光学精密机械与物理研究所 | A kind of satellite platform horizontal direction Dynamic Simulation device |
| CN107300453B (en) * | 2017-06-30 | 2019-07-19 | 中国科学院长春光学精密机械与物理研究所 | A kind of satellite platform horizontal direction Dynamic Simulation device |
| CN108532969A (en) * | 2018-05-31 | 2018-09-14 | 重庆建工集团股份有限公司 | A kind of the type steel support device and its construction method of loading hole built-in fitting |
| CN109724761A (en) * | 2019-02-21 | 2019-05-07 | 河南工业大学 | A kind of vertical tube group storehouse model test platform |
| CN109724761B (en) * | 2019-02-21 | 2024-05-24 | 河南工业大学 | Vertical cylinder group bin model test platform |
| CN110930832A (en) * | 2019-12-11 | 2020-03-27 | 中国矿业大学 | Free vibration experimental device |
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