CN103226053A - Operational modal shape testing system for nonlinear material structure - Google Patents
Operational modal shape testing system for nonlinear material structure Download PDFInfo
- Publication number
- CN103226053A CN103226053A CN2013100969701A CN201310096970A CN103226053A CN 103226053 A CN103226053 A CN 103226053A CN 2013100969701 A CN2013100969701 A CN 2013100969701A CN 201310096970 A CN201310096970 A CN 201310096970A CN 103226053 A CN103226053 A CN 103226053A
- Authority
- CN
- China
- Prior art keywords
- material structure
- nonlinear material
- mode shape
- testing system
- nonlinear
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention relates to a structural dynamics testing system, particularly to an operational modal shape testing system for a nonlinear material structure. The operational modal shape testing system for the nonlinear material structure is characterized by comprising a nonlinear material structure test piece, a vibrostand, a base and a laser vibration measurer. The vibrostand generates a certain sweep frequency and fixed-frequency constant-amplitude excitation; the nonlinear material structure test piece is fixedly connected with one end of the base; the other end of the base is fixed to the vibrostand; the laser vibration measurer is a non-contact scanning laser vibration measurer and causes no accessory quality influence on the nonlinear material structure; and when the vibrostand generates excitation to the nonlinear material structure test piece, the laser vibration measurer can measure the speed of vibration at each measuring point on the test piece and further provides the operational modal shape of the nonlinear material structure. The operational modal shape testing system can test the operational modal shape at each stage of the nonlinear material structure test piece under vibration excitation at different frequencies.
Description
Technical field:
The present invention relates to the Structural Dynamics test macro, particularly relate to nonlinear material structure operation Mode Shape test macro.
Background technology
Nonlinear material is widely used in the engineering structure, and the nonlinear material structure has good applicability because of its distinctive mechanical characteristic makes it.As rubber is a kind of macromolecular compound, the adhering performance that it is intrinsic, it in the time having, is rubbed and hysteresis characteristic in distortion, these characteristics make mechanical energy be converted into heat energy and consume, distortion is big under less stress, nonlinear characteristic is bright, the damping capacity that Here it is when rubber is used to vibration and noise reducing.Steel fiber reinforced concrete is function admirable and widely used advanced composite material (ACM), also is a kind of nonlinear material.It can improve concrete tension, anti-folding, shearing strength, ductility, impact resistance and non-deformability greatly, is widely used in the engineerings such as road, bridge, building and water conservancy.The operation Mode Shape is the true vibration shape of structure structure under the actual boundary condition, can reflect the unusual part that exists in the structure effectively.Therefore can be further used as the foundation of structure for health diagnosis, structural dynamic optimal design.The present invention is directed to the characteristics of nonlinear material structure, adopt the non-contact testing technology, can test out the nonlinear material structure operation Mode Shape that tallies with the actual situation, the Gernral Check-up and the Dynamic Optimum Design that further can be the nonlinear material structure provide technical support.
Summary of the invention:
The technical matters that solves
The technical matters that the present invention solves is for testing out nonlinear material structure operation Mode Shape.
Technical scheme
A kind of nonlinear material structure operation Mode Shape test macro is characterized in that being made up of nonlinear material structure test specimen, shaking table, pedestal, laser vibration measurer; Nonlinear material structure test specimen and pedestal one end are fixedly connected, and the pedestal other end and shaking table are fixed together; Shaking table produces the constant amplitude excitation of certain frequency.。
Described shaking table is mechanical shaker, hydraulic vibration generator, electrodynamic vibration shaker.
Described nonlinear material structure is served as reasons and is had the compound compound substance of geometry or material nonlinearity characteristic, as the structure of materials such as rubber, steel fiber reinforced concrete composition.
Specify:
The present invention includes nonlinear material structure test specimen, shaking table, pedestal, laser vibration measurer.Shaking table produces the frequency sweep and the excitation of fixed constant amplitude frequently of certain frequency.Nonlinear material structure test specimen and pedestal one end are fixedly connected, and the pedestal other end and shaking table are fixed together.Laser vibration measurer is the non-contact scanning laser vibration measurer, the nonlinear material structure is not produced the annex quality influence.When shaking table encouraged nonlinear material structure test specimen, laser vibration measurer can be tested the speed of each measuring point vibration on the test specimen.Laser vibration measurer can test out the operation Mode Shape of nonlinear material structure test specimen under the different frequency exciting thus.Structure of the present invention is the notion of structure in the Structural Dynamics, and the nonlinear material structure is the structure that materials such as rubber or steel fiber reinforced concrete are formed.Described shaking table is mechanical shaker, hydraulic vibration generator, electrodynamic vibration shaker.Described laser vibration measurer is the non-contact scanning laser vibration measurer.
Beneficial effect
The present invention is applied the excitation of certain frequency, constant amplitude to nonlinear material structure test specimen by shaking table, make nonlinear material structure test specimen produce a steady-state vibration, by the vibration velocity of non-contact scanning laser vibration measurer interrecord structure diverse location, thereby provide the operation Mode Shape of whole nonlinear material structure.The present invention is simple to operate, and is easy to maintenance, and the characteristics of traditional method of testing and modern measuring technology quantification are combined, and can provide the operation Mode Shape of nonlinear material structure, and can provide the concrete value of key point vibration velocity on the structure quantitatively.Test macro can be widely used in the test of nonlinear material structure operation Mode Shape.
Description of drawings:
Fig. 1 is the cut-open view of the operation Mode Shape test macro embodiment of nonlinear material structure of the present invention;
Wherein: the 1-shaking table; The 2-pedestal; 3-nonlinear material structure test specimen; The 4-laser vibration measurer.
Fig. 2 is at excitation amplitude 5m/s
2The time elastomeric material transverse joint arch dam model first rank operations Mode Shape figure is arranged.
Fig. 3 is at excitation amplitude 5m/s
2The time elastomeric material transverse joint arch dam model second rank operations Mode Shape figure is arranged.
Fig. 4 is at excitation amplitude 5m/s
2The time elastomeric material transverse joint arch dam model the 3rd rank operations Mode Shape figure is arranged.
Five, embodiment
Embodiment 1
The operation Mode Shape test macro of nonlinear material structure of the present invention shown in Figure 1 comprises nonlinear material structure test specimen 3, shaking table 1, pedestal 2, laser vibration measurer 4.Nonlinear material structure 3 test specimens and pedestal 2 one ends are fixedly connected, and pedestal 2 other ends and shaking table 1 are fixed together.Shaking table 1 produces the constant amplitude excitation of certain frequency.Laser vibration measurer 4 is the non-contact scanning laser vibration measurer, and laser vibration measurer can be tested the vibration velocity of test specimen difference in vibration processes, is provided the operation Mode Shape of whole test specimen again by the vibration velocity of difference.Therefore can test out the operation Mode Shape of nonlinear material structure test specimen under the different frequency exciting.In the present embodiment: shaking table 1 is the DYS-300-2-60 electric vibration table that Suzhou experimental apparatus head factory is produced.Test specimen 3 has the transverse joint arch dam model for elastomeric material.Laser vibration measurer is the PSV-I-400 type noncontact scanning type laser vialog that German POLYTEC company produces.
Adopt elastomeric material the transverse joint arch dam model to be arranged as nonlinear material structure test specimen.Electric vibration table at first carries out the frequency sweep vibration during experiment, determines first three rank natural frequency of structure on the frequency response function of swept frequency excitation nonlinear material structure test specimen vibratory response.Electric vibration table carries out deciding the frequency exciting in each rank natural frequency then, and excitation amplitude is 5m/s
2The mesomerism at the natural frequency place, corresponding every rank of Que Dinging response is the operation Mode Shape of structure thus.Fig. 2 is at excitation amplitude 5m/s
2The time elastomeric material transverse joint arch dam model first rank operations Mode Shape figure is arranged.Fig. 3 is at excitation amplitude 5m/s
2The time elastomeric material transverse joint arch dam model second rank operations Mode Shape figure is arranged.Fig. 4 is at excitation amplitude 5m/s
2The time elastomeric material transverse joint arch dam model the 3rd rank operations Mode Shape figure is arranged.Test macro removes the operation Mode Shape that can provide the whole test specimen of nonlinear material structure, also can provide the concrete response numerical value of each measuring point on the test specimen.
Claims (4)
1. a nonlinear material structure operation Mode Shape test macro is characterized in that being made up of nonlinear material structure test specimen, shaking table, pedestal, laser vibration measurer; Wherein nonlinear material structure test specimen is fixedlyed connected with pedestal one end, and the pedestal other end and shaking table are fixed together.
2. a kind of nonlinear material material structure operation Mode Shape test macro according to claim 1 is characterized in that described shaking table is mechanical vibration generator system, hydraulic vibration generator or electrodynamic vibration shaker.
3. a kind of nonlinear material structure operation Mode Shape test macro according to claim 1 is characterized in that described nonlinear material structure is the compound compound substance with geometry or material nonlinearity characteristic.
4. a kind of nonlinear material structure operation Mode Shape test macro according to claim 3 is characterized in that described compound substance is rubber, steel fiber reinforced concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100969701A CN103226053A (en) | 2013-03-25 | 2013-03-25 | Operational modal shape testing system for nonlinear material structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100969701A CN103226053A (en) | 2013-03-25 | 2013-03-25 | Operational modal shape testing system for nonlinear material structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103226053A true CN103226053A (en) | 2013-07-31 |
Family
ID=48836582
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013100969701A Pending CN103226053A (en) | 2013-03-25 | 2013-03-25 | Operational modal shape testing system for nonlinear material structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103226053A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103575382A (en) * | 2013-11-28 | 2014-02-12 | 重庆长安汽车股份有限公司 | Method for testing local mode of automotive sheet part |
| CN104931218A (en) * | 2015-06-30 | 2015-09-23 | 宁波大学 | System of modal vibration mode of non-contact measuring flexible structure |
| CN108106804A (en) * | 2017-12-13 | 2018-06-01 | 中国飞机强度研究所 | A kind of cantilever design working deformation test method and system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007031742A1 (en) * | 2007-07-06 | 2009-01-08 | Schaeffler Kg | Test specimen's e.g. roller bearing, noise testing device, has laser vibrometer detecting vibrations on test specimen, and evaluation unit outputting quality signal in dependence of detected vibrations of test specimen |
| DE102007032064A1 (en) * | 2007-07-10 | 2009-01-15 | Siemens Ag | Test piece holder and method for vibration material testing |
| CN101963786A (en) * | 2010-08-06 | 2011-02-02 | 南京航空航天大学 | Photostrictive driver based vibration wireless driving control device and method |
| CN102494858A (en) * | 2011-11-15 | 2012-06-13 | 河海大学 | Testing system for vibration shape of biomaterial structure |
-
2013
- 2013-03-25 CN CN2013100969701A patent/CN103226053A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007031742A1 (en) * | 2007-07-06 | 2009-01-08 | Schaeffler Kg | Test specimen's e.g. roller bearing, noise testing device, has laser vibrometer detecting vibrations on test specimen, and evaluation unit outputting quality signal in dependence of detected vibrations of test specimen |
| DE102007032064A1 (en) * | 2007-07-10 | 2009-01-15 | Siemens Ag | Test piece holder and method for vibration material testing |
| CN101963786A (en) * | 2010-08-06 | 2011-02-02 | 南京航空航天大学 | Photostrictive driver based vibration wireless driving control device and method |
| CN102494858A (en) * | 2011-11-15 | 2012-06-13 | 河海大学 | Testing system for vibration shape of biomaterial structure |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103575382A (en) * | 2013-11-28 | 2014-02-12 | 重庆长安汽车股份有限公司 | Method for testing local mode of automotive sheet part |
| CN103575382B (en) * | 2013-11-28 | 2016-04-27 | 重庆长安汽车股份有限公司 | A kind of local mode's method of testing of automotive sheet part |
| CN104931218A (en) * | 2015-06-30 | 2015-09-23 | 宁波大学 | System of modal vibration mode of non-contact measuring flexible structure |
| CN108106804A (en) * | 2017-12-13 | 2018-06-01 | 中国飞机强度研究所 | A kind of cantilever design working deformation test method and system |
| CN108106804B (en) * | 2017-12-13 | 2020-04-28 | 中国飞机强度研究所 | Cantilever structure working deformation test method and system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2015530570A (en) | A method for determining the non-propagation threshold of fatigue cracks at high frequencies. | |
| CN109374452B (en) | Fatigue damage state characterization method and test device for prestressed concrete beam | |
| CN103592018B (en) | High-low cycle compound fatigue test high-cycle amplitude measuring equipment and method | |
| CN103226053A (en) | Operational modal shape testing system for nonlinear material structure | |
| CN203385699U (en) | System for detecting residual stress and structure defect | |
| Ongpeng et al. | Characterization of damage using ultrasonic testing on different types of concrete | |
| Awoyera et al. | Experimental and numerical analysis of large-scale bamboo-reinforced concrete beams containing crushed sand | |
| Jamadin et al. | Effect of high-cyclic loads on dynamic response of reinforced concrete slabs | |
| CN103575490B (en) | The loading method of finite space lower support system dynamic flexibility test | |
| Haldar et al. | Vibration characteristics of thermoplastic composite | |
| CN102539160A (en) | Jogging fatigue simulation experiment system of resonant internal combustion engine | |
| CN202494570U (en) | Resonant fretting fatigue simulation experiment system for internal combustion engine | |
| Ali et al. | Effect of fibre content on dynamic properties of coir fibre reinforced concrete beams | |
| Shui et al. | Characterization of surface damage of a solid plate under tensile loading using nonlinear Rayleigh waves | |
| Li et al. | Fatigue crack width detection based on the active sensing method: a feasibility study | |
| CN109136527B (en) | Vibration aging process parameter determination method based on acoustic emission technology | |
| Ning et al. | Experimental Study on Fracture Properties of Hydraulic Concrete with Different Crack‐Depth Ratios Based on Acoustic Emission and DIC Techniques | |
| Venkategowda et al. | Free vibration characteristics of alkali treated unidirectional long kenaf fiber reinforced epoxy composites at various end conditions | |
| Prasad et al. | Study on change in modal parameters of RC beams due to fatigue type damage | |
| Bovsunovsky | Features of vibration-based damage detection in stepped shafts of steam turbines | |
| Tissera | Realistic Wind Loads on Reinforced Masonry Walls | |
| Klekot | The measure of propagation of vibration for assessment of damages in concrete beam | |
| Saleh et al. | Damage detection in non-prismatic reinforced concrete beams using curvature mode shapes | |
| CN113720516B (en) | Method for detecting effective pretension of prestressed tendons | |
| RU2354949C2 (en) | Non-destructive method of controlling quality of pre-cast concrete structures |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20130731 |