CN102410939A - Hydraulic pulse excitation device for experimental investigation on dynamic characteristics of structure - Google Patents
Hydraulic pulse excitation device for experimental investigation on dynamic characteristics of structure Download PDFInfo
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- CN102410939A CN102410939A CN2011104019003A CN201110401900A CN102410939A CN 102410939 A CN102410939 A CN 102410939A CN 2011104019003 A CN2011104019003 A CN 2011104019003A CN 201110401900 A CN201110401900 A CN 201110401900A CN 102410939 A CN102410939 A CN 102410939A
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Abstract
The invention discloses a hydraulic pulse excitation device for experimental investigation on dynamic characteristics of a structure. The hydraulic pulse excitation device comprises a bottom plate, a pulse excitation component and a switch component, wherein the pulse excitation component comprises an impacting shaft, a sleeve, an excitation spring, an excitation hydraulic cylinder and a connector; the switch component comprises a switch hydraulic cylinder, a switch driving lever and a switch resetting mechanism; the excitation spring drives the impacting shaft to generate an impact force, and the switch resetting mechanism is used for locking and releasing the impacting shaft. In the hydraulic pulse excitation device, the hydraulic cylinder is used as an excitation driving mechanism, the hydraulic cylinder has a sealing function, so that the hydraulic pulse excitation device can respectively execute pulse excitation on the structure in air and under water, thereby realizing experiment and measurement of the dynamic characteristics of the structure in air and under water; by regulating the amount of compression of the excitation spring, the hydraulic pulse excitation device can accurately control the size of the excitation force used when pulse excitation is applied to the structure, and excellent repeatable accuracy is obtained in aspects of the origin of force of excitation and the excitation force direction.
Description
Technical field
The present invention relates to physical construction technique of dynamic measurement field, be specially a kind of hydraulic impulse exciting bank that is used for the Structure dynamic characteristics experimental study.
Background technology
Experimental study to Structure dynamic characteristics mainly is divided into two kinds: the one, under the steady stimulation condition, measure structure corresponding dynamic characteristic; The 2nd, under the transient excite condition, measure the corresponding dynamic perfromance of structure.Measurement structure dynamic perfromance under the transient excite condition, the normal at present method that adopts is a pulse excitation method.And the pulse excitation method normal open exertin hammer mode of knocking comes structure is applied pulse excitation.In experimental measurement, need repeatedly knock at the same terms so that through on average reducing error, improve measuring accuracy.Therefore, when knocking, the position of center of effort, the size of power and action direction all need repeatable accuracy preferably.Obviously no matter, knock with holding the power hammer, be the position of center of effort, or the size and Orientation of hammer force, all is difficult to the repeatable accuracy that reaches higher.When structure was big, employing power hammer knocks maybe the abundant mode of excitation structure, therefore causes the measurement result mistake.
The experimental study for Structure dynamic characteristics at present mainly concentrates in the air ambient, along with the deep exploitation of ocean, for structure under water the experimental study of the dynamic perfromance in the environment need further carry out and go deep into.Owing to also there is not at present the vibrator that can work under water, so, can't adopt the measuring method that need apply steady stimulation to structure for the measurement of submerged structure dynamic perfromance.For the test of submerged structure dynamic perfromance, the normal at present disposal route that adopts is that structure division is surfaced, and surfacing in structure partly applies excitation to structure.Because structure is not under water fully, test result can produce than mistake; And,, just can't adopt this disposal route when under the needs research deep water conditions during Structure dynamic characteristics.
Summary of the invention
The technical matters that solves
Technical matters to be solved by this invention is: when having now through pulse excitation method measurement structure dynamic perfromance; When employing power hammer knocks structure; The action direction repeatable accuracy of the size of center of effort position, power and power is low; And when structure was big, employing power hammer knocks maybe the abundant mode of excitation structure, therefore causes the measurement result mistake; In addition, the present device accurately tested of still unmatchful submerged structure dynamic perfromance.For solving the problem that prior art exists, the present invention proposes a kind of hydraulic impulse exciting bank that is used for the Structure dynamic characteristics experimental study.
Technical scheme
Technical scheme of the present invention is:
Said a kind of hydraulic impulse exciting bank that is used for the Structure dynamic characteristics experimental study is characterized in that: comprise base plate, pulse excitation assembly and switch module;
The pulse excitation assembly comprises impact groove, sleeve, excitation spring, excitation hydraulic cylinder and web member; Spring is coaxial is placed in the sleeve in excitation; The impact groove middle part has annular protrusion, impact groove to stretch into sleeve one end, and the impact groove middle part is fixedly connected with excitation spring one end; The piston rod of excitation hydraulic cylinder stretches into the other end of sleeve, and the piston rod end of excitation hydraulic cylinder is fixedly connected with the excitation spring other end through web member; The central axis conllinear of impact groove, sleeve, excitation spring and excitation hydraulic cylinder piston rod; The drop bar position of impact groove is fixed through impact groove bearing and base plate, and between impact groove bearing and drop bar, orienting sleeve is installed; Sleeve is fixed through sleeve bearing and base plate; The excitation hydraulic cylinder is fixed through hydraulic cylinder bearing and base plate;
Switch module comprises switch hydraulic cylinder, switch driving lever and switch resetting-mechanism; The switch resetting-mechanism comprises switch pin, back-moving spring and switch end cap; The switch hydraulic cylinder is fixed through sleeve bearing and base plate; The piston rod of switch hydraulic cylinder is fixedly connected with switch driving lever end; The switch driving lever cooperates with the switch pin inclined-plane, and back-moving spring is enclosed within on the switch pin, and back-moving spring receives the protruding constraint of switch end cap and switch pin middle part and is in compressive state; The switch pin end cooperates with impact groove middle part annular protrusion, realizes the lock of impact groove is put control.
Beneficial effect
The present invention adopts hydraulic cylinder as the excitation driving mechanism; Itself has sealing function hydraulic cylinder; So the present invention can apply pulse excitation to structure under water in the air neutralization respectively, can be implemented in the air neutralization under water to the experimental measurement of Structure dynamic characteristics, the maximum water depth of use is greater than 1000m; The present invention is through regulating the decrement of excitation spring, can accurately control the exciting force size when structure applied pulse excitation, and excitation center of effort and exciting force direction have good repeatable accuracy.
Description of drawings
Fig. 1: structural representation of the present invention;
Fig. 2: behind the exciting, the structure dissipation factor of certain the tabula rasa structure that measures is with the change curve of frequency in the air;
Fig. 3: behind the exciting, the structure dissipation factor of certain the tabula rasa structure that measures is with the change curve of frequency under water;
Wherein: 1. base plate, 2. impact groove, 3. impact groove bearing, 4. orienting sleeve, 5. switch bearing; 6. sleeve, 7. sleeve bearing, 8. excitation spring, 9. web member, 10. excitation hydraulic cylinder piston rod protective sleeve; 11. the hydraulic cylinder bearing, 12. excitation hydraulic cylinders, 13. switch hydraulic cylinder piston rod protective sleeves, 14. switch hydraulic cylinders, 15. switch hydraulic cylinder piston rod orienting sleeves; 16. back-moving spring, 17. switch pins, 18. switch end caps, 19. switch driving levers.
Embodiment
Below in conjunction with specific embodiment the present invention is described:
The hydraulic impulse exciting bank focalization plate that adopts the present invention to propose in the present embodiment has carried out the exciter test in air ambient and the underwater environment, measured tabula rasa under varying environment the structure dissipation factor with the variation of frequency.
With reference to accompanying drawing 1, the hydraulic impulse exciting bank in the present embodiment comprises base plate 1, pulse excitation assembly and switch module.
The pulse excitation assembly comprises impact groove 2, sleeve 6, excitation spring 8, excitation hydraulic cylinder 12 and web member 9.Excitation spring 8 coaxial being placed in the sleeve 6; There is annular protrusion at impact groove 2 middle parts, and impact groove stretches into the end inside of sleeve 6, and the impact groove middle part is fixedly connected through pin with excitation spring 8 one ends; It is inner that one side piston rod of excitation hydraulic cylinder 12 stretches into the other end of sleeve 6, and this side piston rod end is fixedly connected with web member 9 screw threads, and web member is fixedly connected through pinning with encouraging the spring other end; The central axis conllinear of impact groove, sleeve, excitation spring and excitation hydraulic cylinder piston rod; The drop bar position of impact groove is fixing with base plate 1 through impact groove bearing 3, and orienting sleeve 4 is installed between impact groove bearing and drop bar; Sleeve is fixed through two sleeve bearings 7 and base plate; The excitation hydraulic cylinder is fixed through two hydraulic cylinder bearings 12 and base plate; Opposite side upper cover of piston rod at excitation hydraulic cylinder 12 has excitation hydraulic cylinder piston rod protective sleeve 10.
Switch module comprises switch hydraulic cylinder 14, switch driving lever 19 and switch resetting-mechanism; The switch resetting-mechanism comprises switch pin 17, back-moving spring 16 and switch end cap 18; The switch hydraulic cylinder also is fixedly connected with sleeve bearing, thereby is fixed on the base plate through sleeve bearing; One side piston rod of switch hydraulic cylinder is fixedly connected with switch driving lever end thread; The switch driving lever cooperates through the inclined-plane with switch pin, and back-moving spring is enclosed within on the switch pin, and back-moving spring receives the protruding constraint of switch end cap and switch pin middle part and is in compressive state; The rectilinear motion of switch hydraulic cylinder piston rod cooperates the rectilinear motion that is converted into switch pin through the inclined-plane, realizes opening of switch pin, and back-moving spring is realized resetting of switch pin; The switch pin end cooperates with impact groove middle part annular protrusion, realizes the lock of impact groove is put control.A side upper cover of piston rod that links to each other with the switch driving lever at the switch hydraulic cylinder has switch hydraulic cylinder piston rod orienting sleeve 15; Opposite side upper cover of piston rod at the switch hydraulic cylinder has switch hydraulic cylinder piston rod protective sleeve 13, and the switch resetting-mechanism is fixed through switch bearing 5 and base plate.
Excitation hydraulic cylinder and switch hydraulic cylinder itself have sealing function among the present invention; Other parts need not sealing; Package unit can use under water; Excitation hydraulic cylinder and switch hydraulic cylinder pass through the accurate motion control that hydraulic pump is realized both piston rods, and the linear reciprocating motion of excitation hydraulic cylinder piston rod is realized the compression of excitation spring and resetted and the emission of impact groove and two processes that reset, through the stroke of hydraulic pump control excitation hydraulic cylinder piston rod; Can accurately control the decrement of excitation spring, thereby accurately control the impulsive force of impact groove.
The process of finishing the work of present embodiment is:
The hydraulic impulse exciting bank is in original state, and switch pin cooperates with impact groove middle part annular protrusion, makes impact groove be in closure state; Hydraulic pump control excitation hydraulic cylinder piston rod rectilinear motion compression excitation spring, and control the size of decrement as required, when the excitation amount of spring compression reached predetermined decrement, the excitation hydraulic cylinder quit work; The switch hydraulic cylinder piston rod drives switch driving lever rectilinear motion, and the inclined-plane mating reaction through switch driving lever and switch pin makes the switch pin rectilinear motion; Switch pin and impact groove middle part annular protrusion break away from; The impact groove emission, the switch hydraulic cylinder quits work, thereby accomplishes the pulse excitation to structure.
When resetting, excitation hydraulic cylinder piston rod rectilinear motion drives excitation spring and impact groove rectilinear motion; After excitation spring and impact groove resetted, the excitation hydraulic cylinder quit work, and the switch hydraulic cylinder piston rod drives switch driving lever rectilinear motion; Switch pin resets under the effect of back-moving spring, and switch pin cooperates with impact groove middle part annular protrusion, and impact groove is locked; The switch hydraulic cylinder quits work, and the hydraulic impulse exciting bank is got back to original state.
Fig. 2 is in air ambient, uses exciting of the present invention, and the tabula rasa structure dissipation factor that measures is with the change curve of frequency, and Fig. 3 uses exciting of the present invention in the environment under water, and the tabula rasa architecture dissipation factor that measures is with the change curve of frequency.From Fig. 2 and Fig. 3, can find out, the dissipation factor of submerged structure in whole test frequency range all greater than air in the dissipation factor of structure, this consistent with theoretical analysis and actual conditions.Therefore, the present invention provides desirable pulse excitation device for the experimental study of Structure dynamic characteristics.
Claims (1)
1. a hydraulic impulse exciting bank that is used for the Structure dynamic characteristics experimental study is characterized in that: comprise base plate, pulse excitation assembly and switch module;
The pulse excitation assembly comprises impact groove, sleeve, excitation spring, excitation hydraulic cylinder and web member; Spring is coaxial is placed in the sleeve in excitation; The impact groove middle part has annular protrusion, impact groove to stretch into sleeve one end, and the impact groove middle part is fixedly connected with excitation spring one end; The piston rod of excitation hydraulic cylinder stretches into the other end of sleeve, and the piston rod end of excitation hydraulic cylinder is fixedly connected with the excitation spring other end through web member; The central axis conllinear of impact groove, sleeve, excitation spring and excitation hydraulic cylinder piston rod; The drop bar position of impact groove is fixed through impact groove bearing and base plate, and between impact groove bearing and drop bar, orienting sleeve is installed; Sleeve is fixed through sleeve bearing and base plate; The excitation hydraulic cylinder is fixed through hydraulic cylinder bearing and base plate;
Switch module comprises switch hydraulic cylinder, switch driving lever and switch resetting-mechanism; The switch resetting-mechanism comprises switch pin, back-moving spring and switch end cap; The switch hydraulic cylinder is fixed through sleeve bearing and base plate; The piston rod of switch hydraulic cylinder is fixedly connected with switch driving lever end; The switch driving lever cooperates with the switch pin inclined-plane, and back-moving spring is enclosed within on the switch pin, and back-moving spring receives the protruding constraint of switch end cap and switch pin middle part and is in compressive state; The switch pin end cooperates with impact groove middle part annular protrusion, realizes the lock of impact groove is put control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110401900.3A CN102410939B (en) | 2011-12-06 | 2011-12-06 | Hydraulic pulse excitation device for experimental investigation on dynamic characteristics of structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110401900.3A CN102410939B (en) | 2011-12-06 | 2011-12-06 | Hydraulic pulse excitation device for experimental investigation on dynamic characteristics of structure |
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| CN102410939A true CN102410939A (en) | 2012-04-11 |
| CN102410939B CN102410939B (en) | 2014-02-26 |
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| CN201110401900.3A Expired - Fee Related CN102410939B (en) | 2011-12-06 | 2011-12-06 | Hydraulic pulse excitation device for experimental investigation on dynamic characteristics of structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103427766A (en) * | 2013-08-07 | 2013-12-04 | 浙江大学 | Deepwater steady force vibration excitation device and vibration excitation output method thereof |
| CN111527393A (en) * | 2017-12-30 | 2020-08-11 | 佩里梅特里克斯有限责任公司 | Determination of structural properties of an object |
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| US4594521A (en) * | 1984-11-15 | 1986-06-10 | Schlicher Rex L | Repeatable explosive-driven pulse generator system and method |
| RU1803754C (en) * | 1991-01-21 | 1993-03-23 | Краматорский Индустриальный Институт | Test for impact tests |
| CN2685528Y (en) * | 2004-03-09 | 2005-03-16 | 中国石化集团胜利石油管理局钻井工艺研究院 | Underground high pressure hydraulic pulse generator |
| CN2914055Y (en) * | 2006-03-24 | 2007-06-20 | 唐升棣 | Arm oscillating structure of gas dynamic type drop testing machine |
| CN101024217A (en) * | 2007-03-30 | 2007-08-29 | 湖南科技大学 | Two-bar impaction-regulatable vibration excitor |
| CN101315262A (en) * | 2008-06-03 | 2008-12-03 | 北京航空航天大学 | Movement objective generating device |
| CN101537577A (en) * | 2009-04-24 | 2009-09-23 | 中国地质大学（武汉） | Electric-control liquid strike and excitation method and device for vibration cutting |
| CN202351069U (en) * | 2011-12-06 | 2012-07-25 | 西北工业大学 | Hydraulic impulse excitation device for experimental research on structure dynamic properties |
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2011
- 2011-12-06 CN CN201110401900.3A patent/CN102410939B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4594521A (en) * | 1984-11-15 | 1986-06-10 | Schlicher Rex L | Repeatable explosive-driven pulse generator system and method |
| RU1803754C (en) * | 1991-01-21 | 1993-03-23 | Краматорский Индустриальный Институт | Test for impact tests |
| CN2685528Y (en) * | 2004-03-09 | 2005-03-16 | 中国石化集团胜利石油管理局钻井工艺研究院 | Underground high pressure hydraulic pulse generator |
| CN2914055Y (en) * | 2006-03-24 | 2007-06-20 | 唐升棣 | Arm oscillating structure of gas dynamic type drop testing machine |
| CN101024217A (en) * | 2007-03-30 | 2007-08-29 | 湖南科技大学 | Two-bar impaction-regulatable vibration excitor |
| CN101315262A (en) * | 2008-06-03 | 2008-12-03 | 北京航空航天大学 | Movement objective generating device |
| CN101537577A (en) * | 2009-04-24 | 2009-09-23 | 中国地质大学（武汉） | Electric-control liquid strike and excitation method and device for vibration cutting |
| CN202351069U (en) * | 2011-12-06 | 2012-07-25 | 西北工业大学 | Hydraulic impulse excitation device for experimental research on structure dynamic properties |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103427766A (en) * | 2013-08-07 | 2013-12-04 | 浙江大学 | Deepwater steady force vibration excitation device and vibration excitation output method thereof |
| CN103427766B (en) * | 2013-08-07 | 2015-12-02 | 浙江大学 | A kind of deep water steady state force exciting device and output excitation method thereof |
| CN111527393A (en) * | 2017-12-30 | 2020-08-11 | 佩里梅特里克斯有限责任公司 | Determination of structural properties of an object |
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| CN102410939B (en) | 2014-02-26 |
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