CN110095357A - The loading device and method of dynamic loading experiment are stretched for self-sealing falling-off connector - Google Patents
The loading device and method of dynamic loading experiment are stretched for self-sealing falling-off connector Download PDFInfo
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- CN110095357A CN110095357A CN201910292867.1A CN201910292867A CN110095357A CN 110095357 A CN110095357 A CN 110095357A CN 201910292867 A CN201910292867 A CN 201910292867A CN 110095357 A CN110095357 A CN 110095357A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/30—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight
- G01N3/303—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight generated only by free-falling weight
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/001—Impulsive
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0032—Generation of the force using mechanical means
- G01N2203/0039—Hammer or pendulum
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Abstract
The present invention relates to a kind of loading devices and method that dynamic loading experiment is stretched for self-sealing falling-off connector, belong to dynamic loading experiment technical field；Apparatus of the present invention include rigid base, transmission platform, weighted platform, connect the rigid threaded rod of weighted platform and transmission platform, it drops hammer, acceleration transducer, dynamic loading sensor, adjust mass block, for adjusting the rubber pad of the different-thickness of load action time and size, positioning pulley, flexible strand, the briquetting of fixed flexible strand, apparatus of the present invention structure is simple, it is easy to process, it is easy to operate, relative to only laying particular emphasis on the case where load is broken in acquisition in reported stretching dynamic loading device, the stretching dynamic load effect time has been paid close attention to simultaneously, three factors of fixture velocity variable and magnitude of load, and the coupling between three is coordinated, test mission can be efficiently accomplished, there is important engineering significance in terms of self-sealing falling-off connector stretches and disconnects dynamic loading determination.
Description
Technical field
The present invention relates to a kind of loading devices and method that dynamic loading experiment is stretched for self-sealing falling-off connector, belong to dynamic
Load test technical field.
Background technique
Aircraft is hit, there are when crash risk pendant occurs, and is attached caused by the fuel leakage reduced in aircraft fuel oil pipeline
Add injury (such as fire), needs to close oil circuit using self-sealing falling-off connector.To prevent the meaning in flying or safeguarding
The influence of outer loaded butt joint, it is desirable that the disconnection load of falling-off connector is greater than the maneuvering load of link position and is less than oil pipe certainly
The breaking load of body.In view of the main force way that tensile load is oil pipe and its connector, it should fall off and connect to self-sealing first
The stretching of head disconnects dynamic loading and is determined, to guarantee that it meets requirement.Since self-sealing falling-off connector is disconnected in emergency
In the process, it is related to magnitude of load, action time and fixture velocity variable etc.." military helicopter anti-crash requires GJB
Regulation in 2681A-2005 11.3.6.3.2 ", the action time of test load, loads fixture was born no more than 0.005s
Velocity variable be 11m/s ± 0.9m/s.In addition, the stretching of self-sealing falling-off connector disconnects the acceptable criterion load model of load
It encloses between 25%~50% of weakest part minimum breaking load in fuel pipe, showing that it disconnects load is not one
Limit value.Therefore, handle coordination between different factors, coupling and disconnect dynamic loading probabilistic experimental rig and
Method is that the stretching of self-sealing falling-off connector disconnects the technological difficulties of dynamic loading experiment.
Currently, the domestic stretching for self-sealing falling-off connector, which disconnects dynamic loading experiment, there is no related open research report,
Foreign countries are more early in the research starting of self-sealing falling-off connector design aspect, but related disconnection load determination and test relevant report pole
It is few.
In addition, the stretching dynamic loading experiment device of structural test is mainly the-load-interpreter of lever that drops hammer
Structure.It, will such as patent of invention " anchoring body dynamic tensile test device and experimental method " (Authorization Notice No.: 105510158 B of CN)
Shock loading conversion is enlarged into stretching dynamic loading, and the Path of Force Transfer of used lever loading mechanism is complex, for grinding
Study carefully the research of rock mass damage interface mechanical characteristic.
It is worth noting that, laying particular emphasis on acquisition more in stretching dynamic loading device reported at present and breaking load, relative carrier
Lotus action time and velocity variable are only as record data.When being disconnected for reply self-sealing falling-off connector emergency, load is made
With the strict demand of the factors such as time, fixture velocity variable and magnitude of load, while handling it and disconnecting the uncertain of dynamic loading
Property, it is necessary to experimental rig and method expansion further research.
Summary of the invention
Present invention seek to address that the above-mentioned problems of the prior art, provides a kind of self-sealing falling-off connector stretching dynamic loading
The device and its test method of test, the stretching for effectively obtaining self-sealing falling-off connector disconnect dynamic loading.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of loading device stretching dynamic loading experiment for self-sealing falling-off connector, the loading device include rigid base
Seat, the self-sealing falling-off connector testpieces being connect with rigid base；The self-sealing falling-off connector testpieces passes through loaded end
Head is connected with transmission platform in self-sealing falling-off connector testpieces lower end；The transmission platform is being driven by rigid threaded rod
Weighted platform is connected with above platform；Dynamic loading sensor is also set up on the transmission platform；The weighted platform it is upper
Surface is provided with rubber pad；It has been positioned vertically above and has dropped hammer in self-sealing falling-off connector testpieces；The lower end difference of dropping hammer
It is provided with adjustment mass block, acceleration transducer.
Quality of dropping hammer, the rubber pad group of the different-thickness for adjusting load action time and size are adjusted by mass block
It closes, rubber pad is placed on weighted platform, is similar to damping buffer, and the rubber pad of different-thickness corresponds to different buffer capacities
Power, further, the difference of buffer capacity can obtain difference after debugging test corresponding to different load action time
It drops hammer and the shock loading of mass block load action time corresponding with different-thickness rubber pad.
On adjustment mass block can be fixed on and drop hammer, and the falling impacts weighted platform together that drops hammer, and by changing mass block
Size change drop impact load；Dynamic loading sensor is fixed on transmission platform, is recorded and is stretched in load mechanism
Dynamic loading changes with time situation；Acceleration transducer is fixed on drop hammer on, record acceleration changes with time situation, into
One step obtains the velocity variable to drop hammer in load mechanism.
Further, described drop hammer is connected with flexible strand one end；The flexible strand other end bypasses positioning pulley, and mentions
It rises tightening flexible strand and is fixed on the ground flexible strand using briquetting.After positioning pulley is fixed on certain altitude, flexible strand one
It holds and is connected with dropping hammer, the other end bypasses positioning pulley, and it promotes tightening flexible strand and is simultaneously fixed on the ground flexible strand using briquetting,
With the vertical initial impact speed for meeting condition to the acquisition simultaneously of heart Impulsive load platform after free-falling that guarantees to drop hammer.
Further, the self-sealing falling-off connector testpieces is connected to rigid base by pedestal, and rigid base is solid
Fixed connection is on the ground.
Further, the intermediate position of the transmission platform transmission platform is equipped with internal thread hole, and the self-sealing falls off
It is provided with external screw thread compatible with internal thread hole on the loaded end of connector test part, is matched by external screw thread, internal thread hole
It closes so that transmission platform is fixedly connected with self-sealing falling-off connector testpieces.
Further, the transmission platform quadrangle offers the first round unthreaded hole, and the weighted platform quadrangle offers
Second round unthreaded hole, the described first round unthreaded hole, the second round unthreaded hole upper and lower position alignment, and rigid threaded rod successively pass through the
One round unthreaded hole, the second round unthreaded hole, are cooperated by the end of thread on weighted platform top and are fixed with its consistent nut, will be driven
Platform is fixedly connected with weighted platform, forms load transfer tooling.
The invention also discloses it is a kind of for self-sealing falling-off connector stretch dynamic loading experiment loading device test method,
Characterized by comprising the following steps:
Step 1: installation stretches the device at the rigid base end of dynamic loading experiment for self-sealing falling-off connector；
Step 2: installation is dropped hammer, so that drop hammer to the requirement distance h of weighted platform, and lead after the free-falling that guarantees to drop hammer
Directly to heart Impulsive load platform；
Step 3: certain thickness rubber pad is placed on weighted platform, while dynamic loading sensor is fixed on transmission
On platform, records and stretch dynamic loading in load mechanism and change with time situation；Acceleration transducer is fixed on drop hammer on,
Record acceleration changes with time situation, further obtains the velocity variable to drop hammer in load mechanism；Dynamic loading passes
Sensor is fixed on transmission platform, is recorded and is stretched dynamic loading in load mechanism and change with time situation；Acceleration sensing
Device is fixed on drop hammer on, record acceleration changes with time situation, further obtains the speed dropped hammer in load mechanism
Variable quantity provides data support to coordinate the relationship between load action time, velocity variable and magnitude of load three；
Step 4: carrying out debugging test using testpieces substitution formal test part of knowing the real situation, debugging for several times, chooses best rubber
The mass block of mat thickness and optimum weight: releasing ground briquetting, and release drops hammer and makes its Impulsive load platform, by rigid threaded rod and
Transmission platform by load transfer be stretch dynamic loading and load on weighted platform, by dynamic loading sensor export load-when
Load and load action time are broken in half interval contour acquisition；Acceleration is obtained by acceleration transducer to change with time situation, is led to
Acceleration is crossed to the integral of time, further obtains the velocity variable to drop hammer in load mechanism；
Step 5: the thickness of the rubber pad on adjustment weighted platform, using the thickness of rubber pad as parameter one；With mass block
Weight as parameter two, and follow the principle that a debugging test only adjusts a parameter, repeat step 2~tetra-, obtain phase
Load action time and velocity variable corresponding to mass block and rubber pad are answered, when acting on the load that energy Pass Test requires
Between, the combination of mass block as defined in fixture velocity variable, rubber pad be marked, and record it is corresponding stretch dynamic loading size,
Above-mentioned Pass Test requires to be the regulation according in national military standard: military helicopter anti-crash requires GJB 2681A-2005；
Step 6: carrying out formal test: mass block and rubber pad acquired in selection debugging test first are selected first
95% lower limit load value, will not be broken under smaller dynamic load effect with verification test part, record magnitude of load, load
Action time, fixture velocity variable；
Select 95% upper limit load value again, if testpieces is broken, and dynamic loading sensor output break dynamic load
For charge values within the scope of acceptable criterion, then product is qualified.
Further, the step one specifically: fix rigid base on the ground, while by self-sealing falling-off connector
Testpieces is fixed in rigid base, and the internal screw thread of transmission platform is tightened with the external screw thread of loaded end and is fixedly connected；Rigidity
Screw rod successively passes through the first round unthreaded hole on transmission platform and the second round unthreaded hole on weighted platform, cooperation and its end of thread
Transmission platform is fixedly connected by consistent nut with weighted platform.
Further, the step two specifically: flexible strand one end is connected with dropping hammer by stationary positioned pulley, drop hammer on
Loading mass block, the flexible strand other end bypass positioning pulley, promote tightening flexible strand so that the requirement dropped hammer to weighted platform away from
Flexible strand is fixed on the ground from h, and using briquetting.
The beneficial effect of the present invention and the prior art is:
1) the present invention is based on weighted platform (contain rubber pad), rigid threaded rod, transmission platform, drop hammer (containing mass block), positioning
The dynamic load of drop impact weighted platform can be converted to and act on the loaded end of self-sealing falling-off connector by pulley, flexible strand
Stretching dynamic loading, realize the stretching dynamic loading experiment of self-sealing falling-off connector, and apparatus structure is simple, easy to process, grasp
Facilitate, test mission can be efficiently accomplished, has in terms of self-sealing falling-off connector stretches and disconnects dynamic loading determination important
Engineering significance；
2) present invention breaks load and load action time by the acquisition of dynamic loading sensor, and is obtained by acceleration transducer
The velocity variable to drop hammer in load mechanism is obtained, demarcates satisfactory mass block, rubber pad combination, and record corresponding
Dynamic loading size is stretched, relative to the case where load is broken in acquisition is only laid particular emphasis in reported stretching dynamic loading device, simultaneously
Three stretching dynamic load effect time, fixture velocity variable and magnitude of load factors have been paid close attention to, and has been coordinated between three
Coupling；
3) present invention successively in acceptable criterion lower limit load value and upper limit load value test, with verification test part
It will not be broken under smaller dynamic load effect, and may be broken under compared with big load dynamic load effect, it can be effective
Reply self-sealing falling-off connector qualification break dynamic loading have the characteristics that uncertainty this, while reducing test of many times can energy band
The accumulative effect of the damage come and the influence that disconnection load is stretched to self-sealing falling-off connector.
Detailed description of the invention
Fig. 1 is the general illustration of test device systematic of the present invention.
Fig. 2 is the load transfer tooling schematic diagram of experimental rig of the present invention.
Fig. 3 is experimental rig transmission platform schematic diagram of the present invention.
Fig. 4 is experimental rig weighted platform schematic diagram of the present invention.
Fig. 5 is self-sealing falling-off connector schematic diagram.
Wherein, 1- drops hammer, and 2- adjusts mass block, 3- acceleration transducer, 4- rubber pad, 5- weighted platform, 6- rigidity base
Seat, 7- nut, 8- rigid threaded rod, 9- self-sealing falling-off connector testpieces, 10- transmission platform, 11- dynamic loading sensor, 12- are fixed
Position pulley, 13- flexible strand, 14- briquetting, the round unthreaded hole of 15- first, 16- internal thread hole, the round unthreaded hole of 17- second, 18- pedestal,
The loaded end 19-.
Specific embodiment
It is clear to keep the purpose of the present invention, technical solution and effect clearer, example is exemplified below to the present invention into one
Step is described in detail.It should be understood that specific implementation described herein is not intended to limit the present invention only to explain the present invention.
As shown in Figure 1, structure structure of the invention includes self-sealing falling-off connector testpieces 9, tried with self-sealing falling-off connector
Part 9 is tested by pedestal 18 is fixedly connected and is fixed on the ground rigid base 6, pass through with self-sealing falling-off connector testpieces 9
Transmission platform 10 that loaded end 19 is fixedly connected, weighted platform 5 connect the rigid threaded rod of weighted platform 5 and transmission platform 10
8, the acceleration transducer 3 for dropping hammer 1, being fixed on dropping hammer of shock loading, the dynamic loading being fixed on transmission platform 10 are provided
Sensor 11, the adjustment mass block 2 for increasing quality of dropping hammer, different-thickness for adjusting load action time and size
Rubber pad 4, is connected with dropping hammer and is used to control release of dropping hammer across positioning pulley at initial release of dropping hammer position positioning pulley 12
The briquetting 14 of inelastic flexible strand 13, fixed flexible strand.
As shown in Figure 2-5, wherein the intermediate position of transmission platform 10 is equipped with one and the loaded end of self-sealing falling-off connector
The internal thread hole 16 that 19 external screw thread matches, and the quadrangle of transmission platform 10 is provided with the first round unthreaded hole 15, as shown in Figure 3；
5 four jiaos of weighted platform offer the second round unthreaded hole 17, as shown in figure 4, rigid threaded rod 8 is successively across the of transmission platform quadrangle
One round unthreaded hole 15 and the second round unthreaded hole 17 of weighted platform quadrangle, and its end of thread is located at weighted platform top, cooperation and
Transmission platform 10 can be fixedly connected by the consistent nut 7 of its end of thread with weighted platform 5, formed load transfer tooling, such as schemed
Shown in 2.
After positioning pulley 12 is fixed on certain altitude, 13 one end of flexible strand 1 is connected with dropping hammer, and the other end bypasses positioning pulley
12, it promotes tightening flexible strand 13 and is fixed on the ground flexible strand 13 using briquetting 14, with lead after 1 free-falling that guarantees to drop hammer
Directly obtain the initial impact speed for the condition that meets simultaneously to heart Impulsive load platform 5；On adjustment mass block 2 can be fixed on and drop hammer,
With the 1 falling impacts weighted platform 5 together that drops hammer, and the size by changing mass block 2 changes the load for 1 impact of dropping hammer；Rubber
Pad 4 is placed on weighted platform, is similar to damping buffer, and the rubber pad 4 of different-thickness corresponds to different buffer capacities, into
The difference of one step, buffer capacity corresponds to different load action time, after debugging test, can obtain difference and drop hammer 1
(containing mass block 2) shock loading load action time corresponding with different-thickness rubber pad 4；Dynamic loading sensor 11 is fixed on biography
On moving platform 10, records and stretch dynamic loading in load mechanism and change with time situation；Acceleration transducer 3, which is fixed on, to be fallen
On hammer 1, record acceleration changes with time situation, further obtain drop hammer in load mechanism 1 velocity variable.
It is including following the invention also discloses the test method for stretching dynamic loading experiment device for self-sealing falling-off connector
Step:
Step 1: rigid base 6 being fixed on the ground, while self-sealing falling-off connector testpieces 9 is fixed on rigid base
On seat.
Step 2: transmission platform internal screw thread 16 being tightened with 9 end of testpieces, 19 external screw thread and is fixedly connected；Rigid threaded rod 8 is first
Afterwards across the round unthreaded hole 15 of transmission platform quadrangle and the round unthreaded hole 17 of weighted platform quadrangle, cooperate consistent with its end of thread
Transmission platform 10 is fixedly connected by nut 7 with weighted platform 5.
Step 3: 13 one end of flexible strand 1 is connected with dropping hammer by stationary positioned pulley 12, drops hammer and loads a certain amount of matter on 1
Gauge block 2,13 other end of flexible strand bypass positioning pulley 12, promote tightening flexible strand 13 and to drop hammer 1 requirement for arriving weighted platform 5
Distance h, and fixed on the ground flexible strand 13 using briquetting 14, heart impact is added with vertical after 1 free-falling that guarantees to drop hammer
Carrying platform 5.The desired initial velocity v in 1 to the distance h of weighted platform 5 and test that wherein drops hammer is related, fixed according to the conservation of energy
Rule, the distance h for 1 to the weighted platform 5 that drops hammer can be acquired by following formula:
In formula: m be drop hammer 1 with adjustment mass block 2 gross mass；G is acceleration of gravity, takes 9.8m/s under normal circumstances2。
Step 4: certain thickness rubber pad 4 being placed on weighted platform 5, while dynamic loading sensor 11 is fixed on biography
On moving platform 10, records and stretch dynamic loading in load mechanism and change with time situation；Acceleration transducer 3, which is fixed on, to be fallen
On hammer 1, record acceleration changes with time situation, further obtain drop hammer in load mechanism 1 velocity variable.
Step 5: using knowing the real situation, testpieces substitution formal test part carries out debugging test, and for several times, the purpose is to choose for debugging
Suitable rubber pad 4 and suitable mass block 2: releasing ground briquetting 14, and release drops hammer and 1 makes its Impulsive load platform 5, by rigid
Property screw rod 8 and transmission platform 10 by load transfer be stretch dynamic loading and load on weighted platform 5, by dynamic loading sensor 11
Load and load action time are broken in the load of output-time graph acquisition；Acceleration is obtained at any time by acceleration transducer 3
Situation of change further obtain the velocity variable to drop hammer in load mechanism by acceleration to the integral of time.
Step 6: adjusting the thickness (as parameter one) of the rubber pad 4 on weighted platform and be fixed on the mass block on dropping hammer
2 weight (as parameter two), and the principle that a debugging test only adjusts a parameter is followed, step 3-5 is repeated, phase is obtained
Answer load action time and velocity variable corresponding to mass block 2 and rubber pad 4, to can Pass Test require in load make
The mass block 2 as defined in time, fixture velocity variable, the combination of rubber pad 4 are marked, and record corresponding stretching dynamic loading
Size.
Step 7: formal test is carried out, since the qualified load that disconnects of self-sealing falling-off connector 9 is not a limit value, but
Within a load range, for the uncertainty for handling the load, following formal test scheme is devised, it is de- to verify self-sealing
Fall whether connector 9 meets product acceptable criterion: mass block 2 and rubber pad 4 acquired in selection debugging test first, it is corresponding
The load range lower limit load value of breaking that stretching dynamic load charge values should be slightly less than product acceptable criterion defined (selects 95% lower limit
Load value), it will not be broken under smaller dynamic load effect with verification test part 9, when record magnitude of load, load act on
Between, fixture velocity variable；Secondly to testpieces apply dynamic loading be slightly less than acceptable criterion defined break load range
Upper limit load value (select 95% upper limit load value), if testpieces 9 is broken, and dynamic loading sensor 11 output is broken
For dynamic load charge values within the scope of acceptable criterion, then product is qualified.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the principle of the present invention, several improvement can also be made, these improvement also should be regarded as of the invention
Protection scope.
Claims (8)
1. a kind of loading device for stretching dynamic loading experiment for self-sealing falling-off connector, which is characterized in that the load dress
Set the self-sealing falling-off connector testpieces (9) including rigid base (6), connecting with rigid base (6)；The self-sealing falls off
Connector test part (9) is connected with transmission platform in self-sealing falling-off connector testpieces (9) lower end by loaded end (19)
(10)；The transmission platform (10) is connected with weighted platform (5) above transmission platform (10) by rigid threaded rod (8)；Institute
Dynamic loading sensor (11) are also set up on the transmission platform (10) stated；The upper surface of the weighted platform (5) is provided with rubber
It pads (4)；Drop hammer (1) has been positioned vertically above in self-sealing falling-off connector testpieces (9)；Described (1) lower end of dropping hammer is set respectively
It is equipped with adjustment mass block (2), acceleration transducer (3).
2. a kind of loading device for stretching dynamic loading experiment for self-sealing falling-off connector according to claim 1, special
Sign is that drop hammer (1) is connected with flexible strand (13) one end；Flexible strand (13) other end bypasses positioning pulley
(12), it and promotes tightening flexible strand (13) and is fixed on the ground flexible strand (13) using briquetting (14).
3. a kind of loading device for stretching dynamic loading experiment for self-sealing falling-off connector according to claim 1, special
Sign is that the self-sealing falling-off connector testpieces (9) is connected to rigid base (6) by pedestal (18), and rigid base
(6) it is fixedly connected on the ground.
4. a kind of loading device for stretching dynamic loading experiment for self-sealing falling-off connector according to claim 1, special
Sign is that the intermediate position of the transmission platform (10) transmission platform 10 is equipped with internal thread hole (16), and the self-sealing is de-
Fall on the loaded end (19) of connector test part (9) be provided with internal thread hole (16) compatible external screw thread, by external screw thread,
The cooperation of internal thread hole (16) is so that transmission platform (10) is fixedly connected with self-sealing falling-off connector testpieces (9).
5. a kind of loading device for stretching dynamic loading experiment for self-sealing falling-off connector according to claim 1, special
Sign is that the transmission platform (10) quadrangle offers the first round unthreaded hole (15), and the weighted platform (5) quadrangle opens up
There are the second round unthreaded hole (17), the described first round unthreaded hole (15), the second round unthreaded hole (17) upper and lower position alignment, and rigidity
Screw rod (8) successively passes through the first round unthreaded hole (15), the second round unthreaded hole (17), is cooperated by the end of thread on weighted platform top
It is fixed with its consistent nut (7), transmission platform (10) is fixedly connected with weighted platform (5), forms load transfer tooling.
6. a kind of test method for stretching dynamic loading experiment loading device for self-sealing falling-off connector, which is characterized in that including
Following steps:
Step 1: installation stretches the device at rigid base (6) end of dynamic loading experiment for self-sealing falling-off connector；
Step 2: installation drop hammer (1) so that drop hammer (1) arrive weighted platform (5) requirement distance h, and guarantee drop hammer (1) freely
Lower backwardness is vertical to heart Impulsive load platform (5)；
Step 3: certain thickness rubber pad (4) is placed on weighted platform (5), while dynamic loading sensor (11) is fixed
On transmission platform (10), records and stretch dynamic loading in load mechanism and change with time situation；Acceleration transducer (3)
It is fixed on and drops hammer on (1), record acceleration changes with time situation, further obtains in load mechanism and drops hammer (1)
Velocity variable；
Step 4: carrying out debugging test using testpieces substitution formal test part of knowing the real situation, debugging for several times, chooses best rubber pad
(4) thickness and the mass block (2) of optimum weight: release ground briquetting (14), release drop hammer (1) make its Impulsive load platform (5),
It is stretching dynamic loading by load transfer and loads on weighted platform (5) by rigid threaded rod (8) and transmission platform (10), by moves
Load and load action time are broken in the load of load transducer (11) output-time graph acquisition；By acceleration transducer (3)
It obtains acceleration to change with time situation, by acceleration to the integral of time, further obtains the decline of load mechanism
The velocity variable of hammer；
Step 5: the thickness of the rubber pad (4) on adjustment weighted platform, using the thickness of rubber pad (4) as parameter one；With quality
The weight of block (2) follows the principle that a debugging test only adjusts a parameter as parameter two, repeats step 2~tetra-,
Load action time and velocity variable corresponding to corrresponding quality block (2) and rubber pad (4) are obtained, to energy Pass Test requirement
Load action time, mass block (2) as defined in fixture velocity variable, rubber pad (4) combination be marked, and record corresponding
Stretching dynamic loading size；
Step 6: carrying out formal test: mass block (2) and rubber pad (4) acquired in selection debugging test first are selected first
95% lower limit load value will not be broken under smaller dynamic load effect with verification test part (9), record magnitude of load,
Load action time, fixture velocity variable；
Select 95% upper limit load value again, if testpieces (9) is broken, and dynamic loading sensor (11) output break it is dynamic
For load value within the scope of acceptable criterion, then product is qualified.
7. a kind of test side for stretching dynamic loading experiment loading device for self-sealing falling-off connector according to claim 6
Method, which is characterized in that the step one specifically:
Rigid base (6) is fixed on the ground, while self-sealing falling-off connector testpieces (9) being fixed in rigid base,
The internal screw thread (16) of transmission platform (10) is tightened with the external screw thread of loaded end (19) and is fixedly connected；Rigid threaded rod (8) is successive
The first round unthreaded hole (15) on transmission platform and the second round unthreaded hole (17) on weighted platform, cooperation and its end of thread
Transmission platform (10) is fixedly connected by consistent nut (7) with weighted platform (5).
8. a kind of test side for stretching dynamic loading experiment loading device for self-sealing falling-off connector according to claim 6
Method, which is characterized in that the step two specifically: stationary positioned pulley (12), by flexible strand (13) one end and (1) phase of dropping hammer
Even, drop hammer loading mass block (2) on (1), and flexible strand (13) other end bypasses positioning pulley (12), promotes tightening flexible strand
(13), so that drop hammer (1) arrive the requirement distance h of weighted platform (5), and flexible strand (13) is fixed on ground using briquetting (14)
On；The distance h can be acquired by following formula:
In formula: m is the gross mass dropped hammer with adjustment mass block；V is initial velocity, and g is acceleration of gravity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910292867.1A CN110095357B (en) | 2019-04-12 | 2019-04-12 | Loading device and method for self-sealing type drop joint tensile dynamic load test |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910292867.1A CN110095357B (en) | 2019-04-12 | 2019-04-12 | Loading device and method for self-sealing type drop joint tensile dynamic load test |
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| CN110095357A true CN110095357A (en) | 2019-08-06 |
| CN110095357B CN110095357B (en) | 2022-02-08 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN111896378A (en) * | 2020-08-06 | 2020-11-06 | 亳州联滔电子有限公司 | Connector tension testing device |
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| CN110686984A (en) * | 2019-09-23 | 2020-01-14 | 南京航空航天大学 | Bending load test loading device and loading method for self-sealing type release joint |
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| CN112903483A (en) * | 2021-03-11 | 2021-06-04 | 天津大学 | Test device and method for simulating collapse and damage of lower beam plate structure under explosive load |
| CN112903483B (en) * | 2021-03-11 | 2023-01-17 | 天津大学 | Test device and method for simulating collapse and damage of lower beam plate structure under explosive load |
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| CN116080846A (en) * | 2023-02-22 | 2023-05-09 | 中国人民解放军92942部队 | Flexible protection device |
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