CN103389202A - Method for testing bolt joint surface contact damping characteristics - Google Patents
Method for testing bolt joint surface contact damping characteristics Download PDFInfo
- Publication number
- CN103389202A CN103389202A CN2013103091046A CN201310309104A CN103389202A CN 103389202 A CN103389202 A CN 103389202A CN 2013103091046 A CN2013103091046 A CN 2013103091046A CN 201310309104 A CN201310309104 A CN 201310309104A CN 103389202 A CN103389202 A CN 103389202A
- Authority
- CN
- China
- Prior art keywords
- test specimen
- joint surface
- dynamic load
- faying face
- bolt joint
- 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
A method for testing bolt joint surface contact damping characteristics is based on an experimental device of bolt joint surface contact damping characteristics. According to the method, as for testing of normal damping characteristics or testing of tangential damping characteristics, different setting is firstly performed; then, longitudinal periodical dynamic loads are applied to a lower test piece and an upper test piece; in the process of applying the periodical dynamic loads, a linear displacement sensor and a force sensor transmit a bolt joint surface linear displacement change signal and a periodical dynamic load signal to a data collection system respectively, and then the signals are output to a computer; and bolt joint surface linear displacement data and dynamic load data of the same period in the stabilization stage during the loading process are selected, the selected joint surface linear displacement data of one period are taken as an X axis, the dynamic load data of the same period are taken as a Y axis, a load-displacement curve is drawn, and the curve is a hysteresis loop which is used for representing the bolt joint surface contact damping characteristics.
Description
Technical field
The present invention relates to a kind of method of testing bolt joint surface contact damping characteristic, belong to machine-building and mechanical kinetics field.
Background technology
Lathe and even all kinds of machinery,, for the requirement that meets function, performance and processing and the convenience of transporting, is not generally a continuous integral body, but by various parts, according to certain specific requirement, combined.Claim the surface that is in contact with one another between part, assembly, parts to be " Machine Joint Surfaces ", be called for short " faying face ", or " surface of contact ".The a large amount of existence of faying face in physical construction, thus make physical construction or system no longer have continuity, and then caused the complex nature of the problem.Faying face exists contact stiffness and contact damping.From the dynamic (dynamical) angle analysis faying face of machinery problem, vibration and the dynamic perfromance of it and physical construction exist close contacting.The reason that two aspects are arranged: on the one hand, faying face rigidity is the important component part of physical construction integral rigidity, sometimes becomes the weak link of integral rigidity; On the other hand, be exactly mechanism or the machine that is formed by hard parts for picture power machine, lathe etc., its total damping value derive from the faying face damping more than 90%, compare with the damping of machine parts itself, the faying face damping has overwhelming superiority.Therefore, the research of faying face dynamic perfromance particularly the research of the contact damping of faying face be from theoretical or from practical application all tool be of great significance.
The faying face of bolt-connection is one of most typical faying face in physical construction.Bolt-connection has the advantages such as connection is reliable, linking intensity is high, detachable, energy self-locking.In general bolt joint surface, different to the tools for bolts ' pretension situation, the faying face contact damping also can be different, and namely tools for bolts ' pretension and bolt joint surface contact damping have direct relation.The tools for bolts ' pretension situation easily obtains, but for the faying face damping, situation is more complex, so far also simple and clear computing method accurately of neither one.Therefore, be necessary the bolt joint surface contact damping is carried out deep research.
Therefore the various countries scholar has also given very large concern and attention to the research of bolt joint surface damping characteristic, and has carried out a large amount of research work.Bolt joint surface is when bearing cyclic loading, and there is the motion of microcosmic slippage and two kinds of forms of macroslip in the faying face position of connection.Macroslip is rare in rational load range, but the microcosmic slippage is but constantly to exist.Research shows, faying face is repeatedly loaded and unloads, its " load-displacement " curve can become a lag loop, the energy that in circulation of the cartographic represenation of area that this loop line encloses, the material of unit volume dissipates with the heat energy form, thereby the generation damping action, this contact damping is called again hysteresis damping.Therefore can identify the faying face parameter by the relation of research load and energy loss.But the mechanism of action of studying the faying face damping wants difficulty a lot, because other structural dampings in the damping of faying face itself and its residing structural system often are in the same order of magnitude.Exactly because so, to measuring equipment and the measuring technology of faying face damping research, have higher requirement.
The reality factor that affects bolt joint surface contact damping characteristic is a lot, and very complicated, and these factors mainly contain:
(1) damping characteristic of faying face is relevant with the load situation of faying face, and the actual dynamic force of bearing of faying face may be normal force, tangential force, moment of flexure, moment of torsion or their combination.The characteristic of damping and these power is relevant, also with the normal pressure of faying face.If the size and Orientation of excitation also will change, so, very complicated force-bearing situation appears in faying face, makes the analysis of faying face dynamic perfromance bring difficulty.
(2) in the situation that damping mechanism is not yet thoroughly verified, the faying face damping can be analyzed with the viewpoint of energy dissipation, measurement and calculation.But the correlative factor of the damping characteristic of faying face is a lot, for example surface geometry pattern and the physical state of faying face; Force-bearing situation between faying face; The medium situation that exists between faying face; Motion and the distortion situation etc. of faying face after stressed.These factors are difficult for again being controlled when studying, analyzing and testing, the error while causing theoretical calculating and practical measurement, even have influence on seeking of rule.
(3) mensuration of faying face dynamic perfromance must obtain by the mensuration to system indirectly as the part of mechanical measuring system.Just must measure simultaneously structural damping with the closely-related material damping of faying face damping, other parts of system in order to measure the faying face damping, then differentiated and separate.Yet it is very difficult measuring, differentiating, separate the faying face damping.
Although the research paper of faying face basic characteristic research this respect is a lot, really provide faying face dynamic basis characterisitic parameter data but seldom, some results or conclusion also are not confirmed, so remain to be done further experimental study; A kind of method that finds more satisfactory faying face contact damping characterisitic parameter to identify is further to improve the condition precedent of overall performance prediction level in the design phase.
Summary of the invention
The experimental technique that the purpose of this invention is to provide the higher and complete test bolt joint surface contact damping characteristic of a kind of precision, by Material Testing Machine, the experiment test specimen is applied the cycle dynamic load, make firmly sensor and linear displacement transducer obtain respectively the cyclic loading signal of Material Testing Machine and vertical linear displacement signal at experiment test specimen faying face place, and utilize data acquisition system (DAS) to send data to computing machine, obtain bolt joint surface " load-displacement " relation, thereby grasp bolt joint surface contact damping characterisitic parameter comprehensively.
To achieve these goals, the present invention has taked following technical scheme.
A kind of method of testing bolt joint surface contact damping characteristic,, based on bolt joint surface contact damping characteristic experimental apparatus, comprise Material Testing Machine (1), two screw rods (2), lower test specimen (3), upper test specimen (4), high-strength bolt (5), linear displacement transducer (6), power sensor (7), dynamic strain indicator, data acquisition system (DAS) and computing machine; High-strength bolt (5) vertically passes the through hole of test specimen (4) and lower test specimen (3), for high-strength bolt (5) applies certain pretightning force, make the end face of test specimen (4) and the end face formation faying face bonded to each other of lower test specimen (3), high-strength bolt (5) is pre-buried foil gauge, foil gauge is drawn wire and is connected dynamic strain indicator, is used for measuring the normal direction pretightning force that high-strength bolt (5) forms faying face; Upper test specimen (4) is connected with Material Testing Machine (1) respectively with logical two screw rods (2) of lower test specimen (3); The longitudinal periodicity of Material Testing Machine (1) by self chuck moves and applies cycle dynamic load longitudinally for bolt joint surface, the amount of movement of chuck is consistent with the displacement variable of faying face, linear displacement transducer (6) is equipped on the chuck of Material Testing Machine, can measure the length travel variable quantity of faying face; Power sensor (7) is equipped on Material Testing Machine (1), is used for dynamic load measuring period; Measure the dynamic strain indicator of bolt pretightening, the linear displacement transducer (6) of measuring faying face straight-line displacement variable quantity and measuring period the dynamic load signal power sensor (7) separately signal export data acquisition system (DAS) to, then be delivered to computing machine, it is characterized in that comprising the following steps:
Step 1: during test bolt joint surface normal direction damping characteristic, apply pretightning force to bolt, start phasing degree, loading cycle frequency and the maximum cycle dynamic load that also is not more than pretightning force by loading cycle number of times, imposed load waveform, the waveform of setting Material Testing Machine (1), lower test specimen (3), upper test specimen (4) are applied vertically cycle dynamic load longitudinally, namely single bolt joint surface has been applied normal direction cycle dynamic load; During the tangential damping characteristic of test bolt joint surface, measure the coefficient of static friction between lower test specimen (3) and upper test specimen (4), apply pretightning force to bolt (5), start phasing degree, loading cycle frequency and maximum by loading cycle number of times, imposed load waveform, the waveform of setting Material Testing Machine (1) and also be not more than the cycle dynamic load of bolt pretightening * coefficient of static friction, lower test specimen (3), upper test specimen (4) are applied cycle dynamic load longitudinally, namely single bolt joint surface has been applied tangential cycle dynamic load;
Described bolt joint surface normal direction damping characteristic refers to that faying face is tangential faying face, namely during horizontal integration face, and the damping characteristic while loading the longitudinal loading perpendicular to tangential faying face; The tangential damping characteristic of described bolt joint surface refers to that faying face is the normal direction faying face, namely vertically vertically during faying face, and the damping characteristic while loading with longitudinal loading that the faying face aspect overlaps;
Step 2: in the process that applies the cycle dynamic load, linear displacement transducer (6), power sensor (7) transfer to data acquisition system (DAS) with bolt joint surface straight-line displacement variable signal, cycle dynamic load signal respectively, then computing machine is delivered in output, can automatically stop when the loading number of times of Material Testing Machine (1) reaches the loading number of times that sets;
Step 3: the bolt joint surface straight-line displacement data in resulting each cycle and dynamic load data are for corresponding one by one, choose bolt joint surface straight-line displacement data and the dynamic load data of same period in stabilization sub stage of loading procedure;
Step 4: take the faying face straight-line displacement data of the one-period chosen as X-axis, the dynamic load data of same period are Y-axis, draw " load-displacement " curve, and this curve is lag loop, and lag loop is used for characterizing bolt joint surface contact damping characteristic.
The cycle dynamic load direction that Material Testing Machine (1) applies is for vertically vertical, and cycle dynamic load direction is all consistent therewith with power sensor (7) direction of measurement separately for linear displacement transducer (6);
The difference of the faying face direction that forms according to the up and down test specimen, described faying face is divided into normal direction faying face and tangential faying face, described normal direction faying face be faying face and the Material Testing Machine (1) of upper test specimen (4) and lower test specimen (3) formation bonded to each other apply vertically cycle dynamic load direction is mutually vertical longitudinally; Described tangential faying face be faying face and the Material Testing Machine (1) of upper test specimen (4) and lower test specimen (3) formation bonded to each other apply vertically longitudinally cycle dynamic load direction overlap.
For the normal direction faying face, the damping characteristic that the present invention surveys is the normal direction damping characteristic; For tangential faying face, the damping characteristic that the present invention surveys is tangential damping characteristic;
No matter be which kind of faying face, the cycle dynamic load direction that Material Testing Machine (1) applies is always vertically vertically, and linear displacement transducer (6) is consistent with cycle dynamic load direction all the time with power sensor (7) direction of measurement separately;
Upper test specimen (4) is connected with screw rod (2) by threaded hole with lower test specimen (3), and Material Testing Machine (1) is by the fixing upper test specimen (4) of clamping screw (2) and lower test specimen (3).
The waveform that Material Testing Machine (1) applies is square wave or sinusoidal wave or triangle dynamic load wave period, in order to choose the cycle dynamic load of different wave, bolt joint surface contact damping characteristic is studied.
Upper test specimen (4) is identical with lower test specimen (3) profile, and material, surfaceness are not limit separately, can have between the faying face of upper test specimen (4) and lower test specimen (3) formation bonded to each other or without media such as oil films.
The device that utilization the present invention relates to can extract and apply certain bolt pretightening and cycle dynamic load, the various conjugation conditions of bolt joint surface (are various basic influence factor: medium between faying face material, job operation, crudy, faying face, Deng) situation under, the contact damping characterisitic parameter curve of bolt joint surface, i.e. lag loop.
Beneficial effect
(1) can find out from experimental provision (Fig. 1), reduced the number of the physical quantity of measuring, the characterisitic parameter that tests out is only the faying face part of properties between the test specimen of up and down, and employing is the direct method of measurement.
(2) due to the static characteristics that is only faying face between the test specimen of test up and down, so can guarantee that bolt joint surface contact damping characteristic is not subjected to the impact of experimental provision system, separates than being easier to.
(3) Material Testing Machine (1) applies the direction of cycle dynamic load, and is mutually vertical or overlap with the faying face of upper test specimen (4) and lower test specimen (3) formation bonded to each other, is not subjected to the impact of moment of flexure while having guaranteed to test the contact damping characteristic; Two screw rods that are connected with lower test specimen (3) with upper test specimen (4), apply the cycle during dynamic load in Material Testing Machine (1), can keep aligning by automatic adjusting position, make its suffered external force that the cycle dynamic load only be arranged, got rid of the impact of moment of torsion on experiment package;
(4) instrument and equipment that adopts in experimentation all has degree of precision, and the analytical approach that data are processed is simple but practical reliable, has improved the accuracy of test bolt joint surface contact damping characteristic.
Description of drawings
Fig. 1 is the system principle diagram of test bolt joint surface contact damping characteristic.
Fig. 2 is that the present invention tests bolt joint surface normal direction contact damping characteristic apparatus structure schematic diagram.
Fig. 3 is that the present invention tests the tangential contact damping characteristic of bolt joint surface apparatus structure schematic diagram.
Fig. 4 is embodiment " load-displacement " curve map in pretightning force 20kn situation.
Fig. 5 is embodiment " load-displacement " curve map in pretightning force 30kn situation.
Fig. 6 is embodiment " load-displacement " curve map in pretightning force 40kn situation.
Fig. 7 is whole test specimen " load-displacement " curve map.
In figure: 1, Material Testing Machine, 2, screw rod, 3, lower test specimen, 4, upper test specimen, 5, high-strength bolt, 6, linear displacement transducer, 7, the power sensor
Embodiment
Below in conjunction with principle of work and structure accompanying drawing, test bolt joint surface contact damping characteristic device and method of the present invention is further described.
As Fig. 2 and Fig. 3, two screw rods 2 respectively with upper test specimen 4 and lower test specimen 3 by being threaded, the effect end face of upper test specimen 4 and the effect end face of lower test specimen 3 formation faying face bonded to each other.High-strength bolt 5 passes the through hole of test specimen 4 and lower test specimen 3 effect end faces and vertical with faying face, and the power that applies on high-strength bolt 5 is to form the pretightning force to faying face.Formed thus bolt joint surface contact damping characteristic test assembly.The bolt joint surface of upper test specimen 4 and lower test specimen 3 formation bonded to each other is orthogonal with additional cycle dynamic load direction or overlap, and has avoided the impact of moment of flexure on experiment package.
Pre-buried foil gauge in screw rod in high-strength bolt 5, it is drawn wire and connects dynamic strain indicator, the pretightning force that is applied with this Measurement accuracy high-strength bolt 5, and the strain signal of high-strength bolt 5 is transferred to data acquisition system (DAS).
Thereby Material Testing Machine 1 is by clamping screw 2 fixing upper test specimen 4 and lower test specimens 3, the experiment package that test specimen 4, lower test specimen 3 and high-strength bolt are formed is in vertical state, so that between 1 pair of upper and lower test specimen of Material Testing Machine, bolt joint surface applies the cycle dynamic load.Two screw rods that are connected with lower test specimen 3 with upper test specimen 4, apply the cycle during dynamic load in Material Testing Machine, can keep aligning by automatic adjusting position, makes its suffered external force that the cycle dynamic load only be arranged, and got rid of the impact of moment of torsion on experiment package., by the correlation parameter of Material Testing Machine 1 is set, can set loading cycle number of times, imposed load waveform, waveform that experiment package is applied and start phasing degree, loading cycle frequency and cycle dynamic load size on Material Testing Machine 1.
The longitudinal periodicity of Material Testing Machine 1 by self chuck moves and applies the cycle dynamic load for bolt joint surface, the amount of movement of chuck is consistent with the length travel variable quantity of faying face, linear displacement transducer 6 is equipped on the chuck of Material Testing Machine 1, i.e. exportable faying face length travel variable signal.Power sensor 7 is equipped on Material Testing Machine 1, is used for output cycle dynamic load signal.The cycle dynamic load direction that Material Testing Machine applies is for vertically vertical, and cycle dynamic load direction is all consistent therewith with power sensor direction of measurement separately for linear displacement transducer;
Data acquisition system (DAS) is connected with computing machine, after processing by data acquisition system (DAS), tools for bolts ' pretension force signal, cycle dynamic load signal, change in displacement signal form respectively tools for bolts ' pretension force data, cycle dynamic load data, change in displacement data, by bolt joint surface contact damping characteristic test method of the present invention, cycle dynamic load data and change in displacement data are processed, obtained bolt joint surface contact damping family curve.
The bolt joint surface straight-line displacement data in resulting each cycle and dynamic load data are for corresponding one by one, choose straight-line displacement data and the dynamic load data of same period in stabilization sub stage of loading procedure, and in the middle of generally choosing, the one-period of number of times gets final product;
Take the faying face straight-line displacement data of the one-period chosen as X-axis, the dynamic load data of same period are Y-axis, draw " load-displacement " curve, this curve is lag loop, the energy that in load loading cycle of the cartographic represenation of area that this loop line encloses, bolt joint surface dissipates with the heat energy form, namely produced by the effect of bolt joint surface contact damping.
Utilize this method can do following two class experiments:
(1) the hold period dynamic load is constant, maintenance is to the normal pressure that faying face applies constant (realizing by high-strength bolt being applied pretightning force), change faying face condition (medium between the area of faying face, roughness, faying face etc.), carry out the relation of research bolt joint surface contact damping characteristic and various faying face conditions.
During experiment, upper test specimen 4 and lower test specimen 3 can be changed dissimilar, and its material, surface working mode, roughness can be identical or different, can also be at the even applying medium of surface in contact of upper test specimen 4 and lower test specimen 3, as No. 20 machinery oil.
(2) under certain faying face condition, keep the normal pressure that faying face is applied constant, change the cycle dynamic load, carry out research bolt joint surface contact damping characteristic and be applied to the relation of cycle dynamic load between faying face.
(3) under certain faying face condition, the hold period dynamic load is constant, change the normal pressure (by changing the pretightning force that high-strength bolt is applied, realizing) be applied to faying face, carry out research bolt joint surface contact damping characteristic and be applied to the relation of cycle dynamic load between faying face.
The following specifically describes the operating process of the 3rd class experiment:
Upper and lower test specimen the selection of material is that HT250-HT250, roughness are 1.6, the surface working mode is the workpiece of corase grind, and between upper and lower test specimen, without medium, the specification of high-strength bolt is M16.The direction that the faying face direction of this upper and lower test specimen formation bonded to each other and Material Testing Machine apply the cycle dynamic load overlaps, therefore ask the tangential contact damping characteristic of this bolt joint surface.
The concrete analysis process is as follows:
1. set experiment relevant rudimentary numerical value
Look into friction factor table commonly used as can be known, HT250-HT250 and without the skin-friction coefficient of medium, be 0.18, the pretightning force that selection is applied to high-strength bolt is 20kn, and Material Testing Machine should be 20kn * 0.18=3.6kn for the up and down test specimen applies cycle dynamic load maximal value.By setting the correlation parameter of Material Testing Machine, the load waveform that Material Testing Machine is applied to experiment package is that 0 degree, cycle dynamic load frequency are 0.02HZ for sinusoidal wave, waveform start phasing degree, it is 5 times that the cycle dynamic load applies number of times, and cycle dynamic load maximal value is 3.6kn.So guarantee certain working time, can obtain data and suitable experimental data amount accurately outside beginning and end period.
2. extract the experiment related data
Material Testing Machine loading cycle dynamic load stops for 5 times afterwards automatically, and in this process, computing machine has obtained the dynamic load data of cycle one to one and the bolt joint surface change in displacement data in 5 cycles, extracts two groups of data in the 3rd cycle.
3. draw " load-displacement " curve map
Take the tangential straight-line displacement data of bolt joint surface in the 3rd cycle choosing as X-axis, the dynamic load data of same period are Y-axis, draw " load-displacement " curve map, and this curve is lag loop, as Fig. 4.The energy that in load loading cycle of the cartographic represenation of area that this loop line encloses, bolt joint surface dissipates with the heat energy form, namely produced by the effect of bolt joint surface contact damping.
4. draw " load-displacement " curve map in other pretightning force situations
Utilize same experiment package, under identical faying face condition, hold period dynamic load waveform, waveform start phasing degree, apply number of times, frequency and size constant, change the normal pressure (by changing the pretightning force that high-strength bolt is applied, realizing) that is applied to faying face and be 30kn, 40kn, repeat above process 1 to 3, can draw out pretightning force as Fig. 5 and be " load-displacement " curve map of 30kn and as the pretightning force of Fig. 6, be " load-displacement " curve map of 40kn.
5. draw " load-displacement " curve map of whole test specimen
Design processes and the on all four whole test specimen of up and down test specimen rear shape bonded to each other, hold period dynamic load waveform, waveform start phasing degree, apply number of times, frequency and size constant, repeated experiments process 1 to 3, draw out " load-displacement " curve map of whole test specimen, as Fig. 7.
6. can be found out by Fig. 4 to Fig. 6, the area that lag loop encloses reduces along with the increase of pretightning force, namely in load loading cycle, bolt joint surface reduces along with the increase of bolt joint surface normal pressure with the energy that the heat energy form dissipates, and acquired results is consistent with the faying face contact damping characteristic of generally acknowledging; And as can be seen from Figure 7, the area that in " load-displacement " curve map of whole test specimen, lag loop encloses is almost nil, can think that the structural damping etc. of material damping, other parts of system does not all have influence on test bolt joint surface damping characteristic, prove reliability and the correctness of these test bolt joint surface contact damping characteristic apparatus and method.
Claims (6)
1. method of testing bolt joint surface contact damping characteristic,, based on bolt joint surface contact damping characteristic experimental apparatus, comprise Material Testing Machine (1), two screw rods (2), lower test specimen (3), upper test specimen (4), high-strength bolt (5), linear displacement transducer (6), power sensor (7), dynamic strain indicator, data acquisition system (DAS) and computing machine; High-strength bolt (5) vertically passes the through hole of test specimen (4) and lower test specimen (3), for high-strength bolt (5) applies certain pretightning force, make the end face of test specimen (4) and the end face formation faying face bonded to each other of lower test specimen (3), high-strength bolt (5) is pre-buried foil gauge, foil gauge is drawn wire and is connected dynamic strain indicator, is used for measuring the normal direction pretightning force that high-strength bolt (5) forms faying face; Upper test specimen (4) is connected with Material Testing Machine (1) respectively with logical two screw rods (2) of lower test specimen (3); The longitudinal periodicity of Material Testing Machine (1) by self chuck moves and applies cycle dynamic load longitudinally for bolt joint surface, the amount of movement of chuck is consistent with the displacement variable of faying face, linear displacement transducer (6) is equipped on the chuck of Material Testing Machine, can measure the length travel variable quantity of faying face; Power sensor (7) is equipped on Material Testing Machine (1), is used for dynamic load measuring period; Measure the dynamic strain indicator of bolt pretightening, the linear displacement transducer (6) of measuring faying face straight-line displacement variable quantity and measuring period the dynamic load signal power sensor (7) separately signal export data acquisition system (DAS) to, then be delivered to computing machine, it is characterized in that comprising the following steps:
Step 1: during test bolt joint surface normal direction damping characteristic, apply pretightning force to bolt (5), start phasing degree, loading cycle frequency and the maximum cycle dynamic load that also is not more than pretightning force by loading cycle number of times, imposed load waveform, the waveform of setting Material Testing Machine (1), lower test specimen (3), upper test specimen (4) are applied vertically cycle dynamic load longitudinally, namely single bolt joint surface has been applied normal direction cycle dynamic load; During the tangential damping characteristic of test bolt joint surface, measure the coefficient of static friction between lower test specimen (3) and upper test specimen (4), apply pretightning force to bolt (5), start phasing degree, loading cycle frequency and maximum by loading cycle number of times, imposed load waveform, the waveform of setting Material Testing Machine (1) and also be not more than the cycle dynamic load of bolt pretightening * coefficient of static friction, lower test specimen (3), upper test specimen (4) are applied cycle dynamic load longitudinally, namely faying face has been applied tangential cycle dynamic load;
Step 2: in the process that applies the cycle dynamic load, linear displacement transducer (6), power sensor (7) transfer to data acquisition system (DAS) with bolt joint surface change in displacement signal, cycle dynamic load signal respectively, then computing machine is delivered in output, can automatically stop when the loading number of times of Material Testing Machine (1) reaches the loading number of times that sets;
Step 3: the bolt joint surface straight-line displacement data in resulting each cycle and dynamic load data are for corresponding one by one, choose bolt joint surface straight-line displacement data and the dynamic load data of same period in stabilization sub stage of loading procedure;
Step 4: take the faying face straight-line displacement data of the one-period chosen as X-axis, the dynamic load data of same period are Y-axis, draw " load-displacement " curve, and this curve is lag loop, and lag loop is used for characterizing bolt joint surface contact damping characteristic.
2. a kind of method of testing bolt joint surface contact damping characteristic according to claim 1, it is characterized in that: the cycle dynamic load direction that Material Testing Machine (1) applies is for vertically vertical, and cycle dynamic load direction is all consistent therewith with power sensor (7) direction of measurement separately for linear displacement transducer (6).
3. a kind of method of testing bolt joint surface contact damping characteristic according to claim 1, it is characterized in that: described faying face is divided into normal direction faying face and tangential faying face, described normal direction faying face be faying face and the Material Testing Machine (1) of upper test specimen (4) and lower test specimen (3) formation bonded to each other apply vertically cycle dynamic load direction is mutually vertical longitudinally; Described tangential faying face be faying face and the Material Testing Machine (1) of upper test specimen (4) and lower test specimen (3) formation bonded to each other apply vertically longitudinally cycle dynamic load direction overlap.
4. a kind of method of testing bolt joint surface contact damping characteristic according to claim 1, it is characterized in that: upper test specimen (4) is connected with screw rod (2) by threaded hole with lower test specimen (3), and Material Testing Machine (1) is by the fixing upper test specimen (4) of clamping screw (2) and lower test specimen (3).
5. a kind of method of testing bolt joint surface contact damping characteristic according to claim 1 is characterized in that: the waveform that Material Testing Machine (1) applies is square wave or sinusoidal wave or triangle dynamic load wave period.
6. a kind of method of testing bolt joint surface contact damping characteristic according to claim 1 is characterized in that: upper test specimen (4) is identical with lower test specimen (3) profile, and material, surfaceness are not limit separately.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103091046A CN103389202A (en) | 2013-07-22 | 2013-07-22 | Method for testing bolt joint surface contact damping characteristics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103091046A CN103389202A (en) | 2013-07-22 | 2013-07-22 | Method for testing bolt joint surface contact damping characteristics |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103389202A true CN103389202A (en) | 2013-11-13 |
Family
ID=49533541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013103091046A Pending CN103389202A (en) | 2013-07-22 | 2013-07-22 | Method for testing bolt joint surface contact damping characteristics |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103389202A (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104019977A (en) * | 2014-06-17 | 2014-09-03 | 沈阳机床(集团)有限责任公司 | Test device for testing contact characteristic of fixed junction surface of machine tool |
| CN104568739A (en) * | 2015-01-27 | 2015-04-29 | 西安理工大学 | Rapid measurement device for contact rigidity and unit contact area ratio of combined surface |
| CN104614162A (en) * | 2015-01-15 | 2015-05-13 | 浙江工业大学 | Bolt connecting piece deformation and friction simulation test device |
| CN105865766A (en) * | 2016-04-01 | 2016-08-17 | 中国电力科学研究院 | Hysteretic characteristic model prediction apparatus and method |
| CN106018264A (en) * | 2016-06-15 | 2016-10-12 | 沈阳建筑大学 | Measuring device and method for mechanical junction surface dynamic contact parameters based on surface texture |
| CN106529038A (en) * | 2016-11-09 | 2017-03-22 | 北京工业大学 | Method for identifying tangential damping characteristic of bolt connecting joint part by means of micro-macro scale model |
| CN107192494A (en) * | 2017-05-14 | 2017-09-22 | 北京工业大学 | A kind of device and method for the measure axial bolts relaxation for considering Contact characteristics |
| CN107402126A (en) * | 2017-08-07 | 2017-11-28 | 北京工业大学 | A kind of tangential single bolt relaxation measurement apparatus and method characterized based on modal parameter |
| CN107543689A (en) * | 2017-08-11 | 2018-01-05 | 北京工业大学 | Double bolt relaxation experimental rigs are determined under a kind of tangential alternate load |
| CN107607398A (en) * | 2017-08-11 | 2018-01-19 | 北京工业大学 | A kind of measuring method of residual stress to bolt fastening structure clamping force influence of fading |
| CN109060336A (en) * | 2018-08-31 | 2018-12-21 | 华南理工大学 | A kind of Z-type Automatic Wedge Belt Tensioner test device |
| CN109711024A (en) * | 2018-12-18 | 2019-05-03 | 国网内蒙古东部电力有限公司经济技术研究院 | One kind being bolted a Force Optimal Analysis method |
| CN115015103A (en) * | 2022-05-24 | 2022-09-06 | 武汉中誉鼎力智能科技有限公司 | Real-time detection method and device for friction factor and microscopic morphology of material surface |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02247542A (en) * | 1989-03-22 | 1990-10-03 | Hitachi Seiki Co Ltd | Accurate joint surface evaluation device |
| KR20080102565A (en) * | 2007-05-21 | 2008-11-26 | 현대자동차주식회사 | Jig for tesing damping force of shock absorber |
| CN101968405A (en) * | 2010-08-27 | 2011-02-09 | 北京工业大学 | Device and method for testing dynamic characteristic of combined surface |
| CN102507175A (en) * | 2011-11-08 | 2012-06-20 | 北京工业大学 | Experimental device for testing normal static characteristic of bolted joint |
| CN102589865A (en) * | 2012-02-17 | 2012-07-18 | 北京工业大学 | Normal stiffness and hysteresis characteristic test experimental device for double-bolt joint surface |
-
2013
- 2013-07-22 CN CN2013103091046A patent/CN103389202A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02247542A (en) * | 1989-03-22 | 1990-10-03 | Hitachi Seiki Co Ltd | Accurate joint surface evaluation device |
| KR20080102565A (en) * | 2007-05-21 | 2008-11-26 | 현대자동차주식회사 | Jig for tesing damping force of shock absorber |
| CN101968405A (en) * | 2010-08-27 | 2011-02-09 | 北京工业大学 | Device and method for testing dynamic characteristic of combined surface |
| CN102507175A (en) * | 2011-11-08 | 2012-06-20 | 北京工业大学 | Experimental device for testing normal static characteristic of bolted joint |
| CN102589865A (en) * | 2012-02-17 | 2012-07-18 | 北京工业大学 | Normal stiffness and hysteresis characteristic test experimental device for double-bolt joint surface |
Non-Patent Citations (1)
| Title |
|---|
| 陈水胜等: "《基于螺栓结合面阻尼特性的分析与研究》", 《湖北工业大学学报》, vol. 28, no. 2, 30 April 2013 (2013-04-30), pages 102 - 104 * |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104019977A (en) * | 2014-06-17 | 2014-09-03 | 沈阳机床(集团)有限责任公司 | Test device for testing contact characteristic of fixed junction surface of machine tool |
| CN104614162A (en) * | 2015-01-15 | 2015-05-13 | 浙江工业大学 | Bolt connecting piece deformation and friction simulation test device |
| CN104614162B (en) * | 2015-01-15 | 2017-09-26 | 浙江工业大学 | Bolt connecting piece deformation and friction simulation test device |
| CN104568739A (en) * | 2015-01-27 | 2015-04-29 | 西安理工大学 | Rapid measurement device for contact rigidity and unit contact area ratio of combined surface |
| CN105865766A (en) * | 2016-04-01 | 2016-08-17 | 中国电力科学研究院 | Hysteretic characteristic model prediction apparatus and method |
| CN106018264B (en) * | 2016-06-15 | 2018-08-14 | 沈阳建筑大学 | Machine Joint Surfaces dynamic Contact parameter measuring apparatus based on Surface Texture and method |
| CN106018264A (en) * | 2016-06-15 | 2016-10-12 | 沈阳建筑大学 | Measuring device and method for mechanical junction surface dynamic contact parameters based on surface texture |
| CN106529038A (en) * | 2016-11-09 | 2017-03-22 | 北京工业大学 | Method for identifying tangential damping characteristic of bolt connecting joint part by means of micro-macro scale model |
| CN106529038B (en) * | 2016-11-09 | 2019-10-29 | 北京工业大学 | A method of it is bolted from micro--grand yardstick model identification in conjunction with the tangential damping characteristic in portion |
| CN107192494A (en) * | 2017-05-14 | 2017-09-22 | 北京工业大学 | A kind of device and method for the measure axial bolts relaxation for considering Contact characteristics |
| CN107402126A (en) * | 2017-08-07 | 2017-11-28 | 北京工业大学 | A kind of tangential single bolt relaxation measurement apparatus and method characterized based on modal parameter |
| CN107402126B (en) * | 2017-08-07 | 2019-12-13 | 北京工业大学 | Tangential single bolt relaxation measuring device and method based on modal parameter characterization |
| CN107607398A (en) * | 2017-08-11 | 2018-01-19 | 北京工业大学 | A kind of measuring method of residual stress to bolt fastening structure clamping force influence of fading |
| CN107543689A (en) * | 2017-08-11 | 2018-01-05 | 北京工业大学 | Double bolt relaxation experimental rigs are determined under a kind of tangential alternate load |
| CN109060336A (en) * | 2018-08-31 | 2018-12-21 | 华南理工大学 | A kind of Z-type Automatic Wedge Belt Tensioner test device |
| CN109711024A (en) * | 2018-12-18 | 2019-05-03 | 国网内蒙古东部电力有限公司经济技术研究院 | One kind being bolted a Force Optimal Analysis method |
| CN109711024B (en) * | 2018-12-18 | 2024-04-05 | 国网内蒙古东部电力有限公司经济技术研究院 | Bolt connection point stress optimization analysis method |
| CN115015103A (en) * | 2022-05-24 | 2022-09-06 | 武汉中誉鼎力智能科技有限公司 | Real-time detection method and device for friction factor and microscopic morphology of material surface |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103389202A (en) | Method for testing bolt joint surface contact damping characteristics | |
| CN103217278B (en) | A kind of method of testing high-strength bolt faying face normal direction static characteristics | |
| CN103969107B (en) | High pressure servo moves true triaxial test machine | |
| CN103217349B (en) | A kind of high-speed electric main shaft sound device for testing stiffness based on three-phase electromagnetic force loading and method | |
| CN103234741A (en) | Device and method for testing tangential static characteristics of single-bolt combined face | |
| Dong et al. | FEA-based prediction of machined surface errors for dynamic fixture-workpiece system during milling process | |
| Weddeling et al. | Analytical methodology for the process design of electromagnetic crimping | |
| Shen et al. | Dynamic characteristics analysis and finite element simulation of steel–BFPC machine tool joint surface | |
| El-Sayed et al. | A normalized transfer matrix method for the free vibration of stepped beams: comparison with experimental and FE (3D) methods | |
| CN104296980A (en) | Device and method for testing normal static stiffness characteristics of joint surfaces of shim plate, foundation and foundation bolt of heavy-duty machine tool | |
| Tian et al. | Vibration Characteristics of Heavy‐Duty CNC Machine Tool‐Foundation Systems | |
| Stoney et al. | Observations of surface acoustic wave strain and resistive strain measurements on broaching tools for process monitoring | |
| Ostasevicius et al. | Numerical–experimental identification of the most effective dynamic operation mode of a vibration drilling tool for improved cutting performance | |
| JP2012002554A (en) | Three dimensional load cell | |
| Gajewski et al. | Inverse analysis and DIC as tools to determine material parameters in isotropic metal plasticity models with isotropic strain hardening | |
| CN202501977U (en) | Experimental device for testing normal-stiffness and retardant features of double-bolt joint surface | |
| CN103604695B (en) | Actuation apparatus for achieving material radial deformation measurement through constant force contact | |
| Sun et al. | Impact Force Magnitude and Location Recognition of Composite Materials. | |
| Huang et al. | Structure optimization design and application of a strain based dynamometer | |
| Seghedin et al. | The Tightening Accuracy of Workpieces in the Multiple Clamping Devices | |
| CN216247500U (en) | Concrete test block strength detection device based on real drilling method | |
| Zhao et al. | An Experiment Study on the Dynamic Characteristics of Linear Rolling Guide | |
| RU2547348C1 (en) | Method of experimental determination of static-dynamic characteristics of concrete under conditions of cyclic loading | |
| CN107588918A (en) | A kind of test crossbeam fastens the experimental provision for connecing joint portion dynamic characteristic | |
| Raval et al. | A Feasibility Study on Use of an Accelerometer to Measure the Dynamic Forces in Turning |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20131113 |