CN105784509A - Drop-hammer impact loading system - Google Patents
Drop-hammer impact loading system Download PDFInfo
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- CN105784509A CN105784509A CN201610135553.7A CN201610135553A CN105784509A CN 105784509 A CN105784509 A CN 105784509A CN 201610135553 A CN201610135553 A CN 201610135553A CN 105784509 A CN105784509 A CN 105784509A
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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
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Abstract
The invention provides a drop-hammer impact loading system. The drop-hammer impact loading system comprises a supporting frame body structure which is arranged in a hollowed manner and an impact drop-hammer structure which is arranged in the supporting frame body structure in a suspended manner and is connected with the supporting frame body structure in a sliding manner; the supporting frame body structure comprises a lattice-type machine frame body which is fixedly arranged on a foundation and a pair of guide posts which are arranged corresponding to the two opposite sides of the impact drop-hammer structure; the drop-hammer structure comprises a drop-hammer body and a post supporting seat which is correspondingly arranged below the drop-hammer body; sliding guide rails which are correspondingly connected with the guide posts are arranged on the two opposite sides of the drop-hammer body; the post supporting seat is fixed on the foundation. The system is simple in structure, high in impact precision, high in impact damage strength, and relatively low in cost.
Description
Technical field
The invention belongs to the technical field of drop impact experiment, particularly to a kind of drop impact loading system.
Background technology
Building in use also can bear other dynamic loads except bearing static load, for instance, bridge pier is subject to a series of impact loads such as the shock of hull, and this impact load is relatively larger on the impact of structure.Thus the mechanical property that research structure component is under Impact Load is extremely necessary, in an experiment in order to ensure the accuracy of result, general experimental configuration component can according to the convergent-divergent by a certain percentage of the component in Practical Project, and zoom degree will not be excessive.Impact experiment machine needs the impact energy providing several ten thousand Jiao even hundreds of thousands burnt, and this gives and designs and produces experimental machine and bring many problems.First, whether breaker possesses enough height makes to fall behind under tup have bigger impact energy, and the impact energy of tup is to be determined by tup quality and tup shock height.Second, tup can be made at height freely falling body accurately, control tup height of drop and can obtain structural elements mechanical property under different Impact Loads.3rd, can breaker be acquired impacting experimental data, the mainly detection to impulsive force and impact energy.4th, can breaker realize various different components are carried out impact experiment, particularly to node, framework, while applying axle power, carries out impact experiment.Current experimental machine is relatively difficult to resolve certainly above four problems.
Such as, the DHR9401 breaker that certain mechanics institute impact experiment indoor is developed voluntarily, experimental machine height 13.47m, the maximum 200kg of quality of dropping hammer, smaller beam, post are carried out impact experiment by this experiment function.Owing to quality of dropping hammer is less, impact energy is less, it is impossible to destroy larger-size concrete filled steel tube.Node, framework cannot be carried out impact experiment simultaneously.A kind of high-performance testing machine of certain university research and development, high 16m, tup is the heaviest up to 824.2kg, it is possible to rush technical ability needed for meeting various experimental member, utilizes piezoelectric transducer detection tup impulsive force simultaneously, installs high performance video camera and observe whole impact process.But beam, post can only be carried out impact experiment by this experimental machine, and structure is complicated, hammering low precision, relatively costly.Therefore, existing drop hammer tester also has a lot of not enough, node, framework is carried out to the existence technological gap of impact experiment while by xial feed.
Summary of the invention
It is an object of the invention to overcome above-mentioned deficiency, provide a kind of drop impact loading system, solve impact degree of accuracy and the impact failure dynamics problem of drop impact loading system, beam, post, node and framework can be carried out respectively impact experiment, and this drop impact loading system is less costly.
The invention provides a kind of drop impact loading system, it is characterized in that, the supporting frame structure that arranges including: hollow and in being suspended at support frame as described above body structure and the impact being slidably connected with support frame as described above body structure drop hammer structure, lattice frame body that support frame as described above body structure includes being fixedly arranged on basis and corresponding described impact are dropped hammer a pair lead that the opposite sides of structure is arranged, described structure of dropping hammer includes dropping hammer body and being correspondingly arranged at the pillar support below the body that drops hammer, the opposite sides of the described body that drops hammer is provided with the corresponding sliding guide rail connecting described lead, described pillar support is fixed on basis.
Preferably, support frame as described above body structure also includes affixed and for the described lead of reinforcing upright supports, and described upright supports is connected with described lattice frame body via multiple stulls.
Preferably, the body that drops hammer described in has also been detachably connected with at least one load plate.
Preferably, also including for a pair portal frame applying static load, two portal frames are respectively to the opposite sides being located at described lattice frame body.
Preferably, described portal frame includes two gate-type columns that interval is arranged oppositely, and has portal frame crossbeam between two described gate-type columns, and described portal frame crossbeam is provided with multiple gate-type fixing hole for fixing jack.
Preferably, also including being located at lattice frame body side and the fixing post of node for stationary nodes cantilever end, the bottom of the fixing post of described node is fixedly arranged on basis, and the fixing post of described node is provided with multiple fixing hole along the spaced radial row of the fixing post of described node.
Preferably, the fixing post height of described node is 2M, and described fixing hole spaced set is in 0.8M to the 1.5M section of the fixing post height of described node, and the described fixing hole of sustained height is arranged in pairs.
Preferably, also including a pair beam support being located on basis, two beam supports are respectively to the opposite sides being located at described lattice frame body.
Preferably, described beam support has a base-plate, and described base-plate is provided with strip slip hole, supports and is extended with sliding shank of bolt on the described basis of described beam support, described sliding shank of bolt and described strip slip hole are slidably connected, for the spacing regulating two described beam supports.
Preferably, also include respectively with described height controller, gas control lifting device and the tup impact detection device dropping hammer and being connected, the encoder in described height controller is connected with the hoist engine in described gas control lifting device.
Drop impact loading system provided by the invention, using the supporting frame structure of hollow setting as the basic framework of drop impact loading system, outstanding in supporting frame structure set impact and drop hammer structure, it is slidably connected with the body that drops hammer by lead, the impact of body of realizing dropping hammer is accurate, and the setting of pillar support is capable of when the charger supporting without other, the accurate impact experiment being connected to realize post is fixed with post, and this system structure is simple, impact precision is high, impact failure dynamics is strong, less costly.
Additionally, in the impact experiment to beam, owing to beam two ends in Practical Project are freely-supporteds, in order to make the Liang Junneng of various span carry out impact experiment on testing machine, when beam support designs, bolt hole (strip slip hole) adopts elongated hole to design, it is ensured that the beam of clear span certain distance carries out impact experiment.
It addition, the axially loaded equipment of node is to be placed under portal frame by node to apply axle power by jack, node Cantilever Beams one end is stretched into the center of drop hammer tester and is impacted, and the other end is fixed on the fixing post of node, it is achieved that the accurate impact experiment of node.
It addition, the axial loading equipemtn of framework is to be placed under portal frame by whole framework to apply axial force by two jack to framework, carry out impact experiment in framework center afterwards.
Accompanying drawing explanation
Fig. 1 is the structural representation of drop impact loading system of the present invention；
Fig. 2 is front view and the side view of lattice frame body in drop impact loading system of the present invention；
Fig. 3 is drop hammer in drop impact the loading system of the present invention front view of body and top view；
Fig. 4 is front view and the top view of drop impact loading system center pillar of the present invention support；
Fig. 5 is the top view of the front view of beam support in drop impact loading system of the present invention and beam support upper plate；
Fig. 6 is front view and the side view of portal frame in drop impact loading system of the present invention；
Fig. 7 is front view and the side view of the fixing post of drop impact loading system interior joint of the present invention.
Detailed description of the invention
For the benefit of the understanding to the structure of the present invention, illustrates below in conjunction with drawings and Examples.
Fig. 1 is the structural representation of drop impact loading system of the present invention.Shown in Fig. 1, the invention provides a kind of drop impact loading system, the supporting frame structure 10 that arranges including: hollow and be suspended in support frame as described above body structure 10 and the impact that is slidably connected with support frame as described above body structure 10 is dropped hammer structure 20, lattice frame body 4 that support frame as described above body structure 10 includes being fixedly arranged on basis and corresponding described impact are dropped hammer a pair lead 7 that the opposite sides of structure 20 is arranged, described structure 20 of dropping hammer includes dropping hammer body 6 and being correspondingly arranged at the pillar support 5 below the body 6 that drops hammer, the described opposite sides dropping hammer body 6 is provided with the corresponding sliding guide rail connecting described lead 7, described pillar support 5 is fixed on basis.
Further, support frame as described above body structure 10 also includes affixed and for the described lead 7 of reinforcing upright supports 8, and described upright supports 8 is connected with described lattice frame body 4 via multiple stulls 11.It addition, described in the body 6 that drops hammer also be detachably connected with at least one load plate.
Further, this drop impact loading system also includes for a pair portal frame 30 applying static load, and two portal frames 30 are respectively to the opposite sides being located at described lattice frame body 4.In the present embodiment, described portal frame 30 includes two gate-type columns 3 that interval is arranged oppositely, and has portal frame crossbeam 2 between two described gate-type columns 3, and described portal frame crossbeam 2 is provided with multiple gate-type fixing hole 12 for fixing jack.
Additionally, this drop impact loading system also includes being located at lattice frame body 4 side and the fixing post 1 of node for stationary nodes cantilever end, the bottom of the fixing post 1 of described node is fixedly arranged on basis, and the fixing post 1 of described node is provided with multiple fixing hole along the radial direction interval row of the fixing post 1 of described node.In the present embodiment, the fixing post height of described node is 2M, and described fixing hole spaced set is in 0.8M to the 1.5M section of the fixing post height of described node, and the described fixing hole of sustained height is arranged in pairs.
In practical application, this drop impact loading system also includes a pair beam support 40 being located on basis, and two beam supports 40 are respectively to the opposite sides being located at described lattice frame body 4.Described beam support 40 has a base-plate, described base-plate is provided with strip slip hole, supporting and be extended with sliding shank of bolt on the described basis of described beam support 40, described sliding shank of bolt and described strip slip hole are slidably connected, for the spacing regulating two described beam supports 40.It addition, this system also include respectively with described height controller, gas control lifting device and the tup impact detection device dropping hammer and being connected, the encoder in described height controller is connected with the hoist engine in described gas control lifting device.
Below in conjunction with accompanying drawing, the concrete structure of the present invention is illustrated:
Fig. 1 is the structural representation of drop impact loading system of the present invention, it is specially a top view, including the fixing post 1 of the node controlling node cantilever end, this node fixes the high 2m of post 1, fixing post 1 lower end of node anchors into basis by bolt, cantilever end for anchorage node section steel beam (waiting to impact node component), consider under the premise that different height of node can carry out impact experiment, on present invention height between 800mm to the 1500mm of the fixing post 1 of node, arranging 2 row's diameters every 100mm is the hole of 30mm, front view and the side view of the fixing post 1 of this node refer to shown in Fig. 7.
In Fig. 1, portal frame includes gate-type column 3 and is located at the portal frame crossbeam 2 between two described gate-type columns 3, it is contemplated that carry out the node of impact experiment, frame height, and present invention design is 3.5m for applying the portal frame height of static load.The hole of 2 row diameter 30mm is set at the middle part of portal frame crossbeam for fixing jack.Lid portal frame formally schemes to refer to shown in Fig. 6 with side view.
Lattice frame body 4 in Fig. 1, lead 7, upright supports 8 and stull 9, the whole high 10m of lattice frame body 4, built-in fitting and foundation anchor are passed through in bottom, and upright supports 8 and frame body 4 are linked together by many stulls 9.Lead 7 is directly connected with upright supports 8, and does not have bigger oscillation crosswise in bottom in order to ensure to impact the body 6 that drops hammer, and upright supports 8 is directly welded together with bottom steel plate.
The tup of body 6 of dropping hammer in Fig. 1 is hammered into shape as 300kg, the load plate of additional 6 pieces of 50kg, and load plate can be properly added in specific requirement empirically, and this drops hammer body 6 front view and top view as shown in Figure 3.
The base-plate of pillar support 5 in Fig. 1, utilizes pre embedded bolt to be connected with basis, top prepared screw-bolt hole, and the elevation of this pillar support 5 and top view are as shown in Figure 4.
In Fig. 1, the base-plate of beam support 40 and upper plate all scrape out elongated hole, the shank of bolt of long 12mm is stretched out on basis, screw rod can move in elongated hole, beam freely-supported bearing also can move in the upper plate elongated hole of beam support 40 simultaneously, beam to meet different spans carries out impact experiment, and this beam support 40 front view and plan view are as shown in Figure 5.
Hereinafter the concrete application specific details of drop impact loading system provided by the invention is described in detail.
Drop loading system includes impacting structure 20 of dropping hammer, supporting frame structure 10, height controller, gas control lifting device, tup impact detection device and being suitable for bearing and the axial loading device that various components load.
Lattice frame body 4 (middle part hollow out for impact drop hammer lifting) high 10m, body 6 gross mass of dropping hammer reaches 600kg, and maximum impact energy is up to 5.88*10^4J, it is possible to meet the impact energy required for component damage.Four corner posts of lattice frame body 4 are by foot bolt fastening in basis, and lead 7 is fixing with upright supports 8 to be connected, and upright supports is connected with four corner posts by many stulls 11.
Described height controller and gas control lifting device are supporting uses, encoder in height controller is connected with the hoist engine in gas control lifting device, namely can realizing input specified altitude assignment value in the encoder and just can control hoist engine drive tup in object height stopping, its precision comparison is high.
Described tup impact detection device is LC0407T piezoelectric acceleration sensor and LC0601 charge amplifier.Piezoelectric acceleration sensor is a kind of electromechanical transducer, piezoelectric effect mainly by piezoelectric ceramics, after piezoelectric acceleration sensor experiences acceleration, piezoelectric element will produce the impulsive force being inversely proportional to acceleration, and owing to tup quality is certain, impulsive force is directly proportional to acceleration, existence due to power, piezoelectric transducer produces electric charge, by charge amplifier output charge amount, it is possible to record experiment impulsive force.
Component loads bearing and axially loaded equipment is to carry out simultaneously, when testing for column impact, it is only necessary to be fixed on by post on prior mounted hold-down support.When beam is carried out impact experiment, owing to beam two ends in Practical Project are freely-supporteds, in order to make the Liang Junneng of various span carry out impact experiment on testing machine, when beam support designs, bolt hole (strip slip hole) adopts elongated hole to design, it is ensured that the beam in clear span 1.8m-2.4m carries out impact experiment.
When needs to node axially loaded time, be node is placed under portal frame by jack apply axle power, the center of drop hammer tester is stretched in node Cantilever Beams one end, impacts, and the other end is bolted on steel column (node fixes post).
The axial loading equipemtn of framework is to be placed under portal frame by whole framework to apply axial force by two jack to framework, carries out impact experiment in framework center afterwards.
Owing to adopting technique scheme, the present invention compared with prior art has good effect, mainly has following two feature, and 1) different structure component can be carried out impact experiment；2) change of impulsive force in impact process can accurately be measured.
Present invention also offers a kind of drop impact loading method, specifically comprise the following steps that
Step 1: treat impact structure component and be fixed installation.
By treating that impact structure component is installed fixing according to the position, hole that correspondence is reserved, if installing for beam, post, directly beam, post are installed on the beam of correspondence, pillar support.In the impact of beam is installed, can rationally select the clear span size of beam according to requirement of experiment.If node is installed, being placed in by node immediately below portal frame, apply corresponding xial feed as requested above through regulating jack, encorbelment and tup just fall center in one end simultaneously, and the other end is bolted on the fixing post of node.If framework is installed, the node treating impact structure component is placed under two portal frames, is surely applied to the rational xial feed of frame column by regulating a thousand pieces of gold.
Step 2: slowly tup (drop hammer body) is discharged so that tup and member contact, then return-to-zero coding device, and key in the height required for the body that drops hammer in the encoder.
Step 3: check detection equipment state, to make a record data preparation.
Step 4: press initiating key, impacts.
Step 5: observe the deformation of member, derives experimental data.
Drop impact loading system provided by the invention, using the supporting frame structure of hollow setting as the basic framework of drop impact loading system, outstanding in supporting frame structure set impact and drop hammer structure, it is slidably connected with the body that drops hammer by lead, the impact of body of realizing dropping hammer is accurate, and the setting of pillar support is capable of when the charger supporting without other, the accurate impact experiment being connected to realize post is fixed with post, and this system structure is simple, impact precision is high, impact failure dynamics is strong, less costly.
Additionally, in the impact experiment to beam, owing to beam two ends in Practical Project are freely-supporteds, in order to make the Liang Junneng of various span carry out impact experiment on testing machine, when beam support designs, bolt hole (strip slip hole) adopts elongated hole to design, it is ensured that the beam of clear span certain distance carries out impact experiment.
It addition, the axially loaded equipment of node is to be placed under portal frame by node to apply axle power by jack, node Cantilever Beams one end is stretched into the center of drop hammer tester and is impacted, and the other end is fixed on the fixing post of node, it is achieved that the accurate impact experiment of node.
It addition, the axial loading equipemtn of framework is to be placed under portal frame by whole framework to apply axial force by two jack to framework, carry out impact experiment in framework center afterwards.
Above in association with accompanying drawing embodiment, the present invention being described in detail, the present invention can be made many variations example by those skilled in the art according to the above description.Thus, some details in embodiment should not constitute limitation of the invention, the present invention by the scope that defines using appended claims as protection domain.
Claims (10)
1. a drop impact loading system, it is characterized in that, the supporting frame structure that arranges including: hollow and in being suspended at support frame as described above body structure and the impact being slidably connected with support frame as described above body structure drop hammer structure, lattice frame body that support frame as described above body structure includes being fixedly arranged on basis and corresponding described impact are dropped hammer a pair lead that the opposite sides of structure is arranged, described structure of dropping hammer includes dropping hammer body and being correspondingly arranged at the pillar support below the body that drops hammer, the opposite sides of the described body that drops hammer is provided with the corresponding sliding guide rail connecting described lead, described pillar support is fixed on basis.
2. drop impact loading system according to claim 1, it is characterised in that support frame as described above body structure also includes affixed and for the described lead of reinforcing upright supports, and described upright supports is connected with described lattice frame body via multiple stulls.
3. drop impact loading system according to claim 1, it is characterised in that described in the body that drops hammer also be detachably connected with at least one load plate.
4. drop impact loading system according to claim 1, it is characterised in that also include for a pair portal frame applying static load, two portal frames are respectively to the opposite sides being located at described lattice frame body.
5. drop impact loading system according to claim 4, it is characterized in that, described portal frame includes two gate-type columns that interval is arranged oppositely, having portal frame crossbeam between two described gate-type columns, described portal frame crossbeam is provided with multiple gate-type fixing hole for fixing jack.
6. drop impact loading system according to claim 4, it is characterized in that, also include being located at lattice frame body side and the fixing post of node for stationary nodes cantilever end, the bottom of the fixing post of described node is fixedly arranged on basis, and the fixing post of described node is provided with multiple fixing hole along the spaced radial row of the fixing post of described node.
7. drop impact loading system according to claim 6, it is characterised in that the fixing post height of described node is 2M, described fixing hole spaced set is in 0.8M to the 1.5M section of the fixing post height of described node, and the described fixing hole of sustained height is arranged in pairs.
8. drop impact loading system according to claim 1, it is characterised in that also include a pair beam support being located on basis, two beam supports are respectively to the opposite sides being located at described lattice frame body.
9. drop impact loading system according to claim 8, it is characterized in that, described beam support has a base-plate, described base-plate is provided with strip slip hole, support and the described basis of described beam support is extended with sliding shank of bolt, described sliding shank of bolt and described strip slip hole are slidably connected, for the spacing regulating two described beam supports.
10. drop impact loading system according to claim 8, it is characterized in that, also include respectively with described height controller, gas control lifting device and the tup impact detection device dropping hammer and being connected, the encoder in described height controller is connected with the hoist engine in described gas control lifting device.
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| CN201610135553.7A CN105784509A (en) | 2016-03-10 | 2016-03-10 | Drop-hammer impact loading system |
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| CN201610135553.7A CN105784509A (en) | 2016-03-10 | 2016-03-10 | Drop-hammer impact loading system |
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| CN105784509A true CN105784509A (en) | 2016-07-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109506872A (en) * | 2018-09-29 | 2019-03-22 | 长安大学 | A kind of impact test apparatus and test method for pressing load function with self-balancing axis |
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| CN109506872B (en) * | 2018-09-29 | 2020-05-29 | 长安大学 | Impact test device with self-balancing axial pressure loading function and test method |
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Application publication date: 20160720 |