CN209820911U - Device is applyed to test piece boundary constraint in anti side impact experiment - Google Patents
Device is applyed to test piece boundary constraint in anti side impact experiment Download PDFInfo
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- CN209820911U CN209820911U CN201920067145.1U CN201920067145U CN209820911U CN 209820911 U CN209820911 U CN 209820911U CN 201920067145 U CN201920067145 U CN 201920067145U CN 209820911 U CN209820911 U CN 209820911U
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Abstract
The utility model relates to a device is applyed to test piece boundary constraint in anti side direction impact experiment. The utility model comprises a support restraint system for mounting a rod-shaped test piece and an axial loading system for applying axial load to the test piece; the support restraint system comprises a first mounting unit and a second mounting unit, a first round through hole is formed in the first mounting unit, and a first rigid connection end welded with one end of the test piece or a first hinge end hinged with one end of the test piece is mounted in the first round through hole; a second circular through hole is formed in the second mounting unit, and a second rigid connection end welded with the other end of the test piece or a second hinge end hinged with the other end of the test piece is mounted in the second circular through hole; and applying and maintaining axial tension or pressure on the test piece through the axial loading system. The utility model discloses in anti side direction impact performance experiment, can exert the tip restraint to rigid coupling, in-plane articulated or the outer articulated axial atress test piece in plane, the function is more comprehensive.
Description
Technical Field
The utility model belongs to the anti side direction impact experiment field of structure specifically is a device is applyed to test piece boundary constraint in anti side direction impact experiment.
Background
The rod system structure is widely applied to engineering such as civil engineering, construction, machinery, ships, water conservancy and the like. In the rod system structure, test pieces can be connected through rigid connection and hinging, and the stress of the test pieces mainly comprises axial pulling and pressing. The rod system structure may be subjected to impact loads such as explosion, vehicle and ship collision, falling of heavy objects and the like during the service period. At this time, the test piece still receives the side impact load effect while bearing the axial load, and how its lateral impact resistance can directly influence the local and even whole performance of the bar system structure. Therefore, the experimental study of the lateral impact resistance of the axial stress test piece has important significance for studying the robustness, the redundancy and the vulnerability of the rod system structure under the impact load and the impact resistance design of the test piece and the rod system structure.
In the lateral impact resistance experiment of the axial stress test piece, the key for accurately obtaining the impact experiment result is to apply real boundary constraint on the test piece. At present, the reported lateral impact resistance experiment of the axial stress rod piece mainly aims at the axial compression rod piece of rigid connection, and the boundary constraint applying device of the axial compression rod piece can only realize rigid connection and has single function.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a device is applyed to anti side direction impact experiment pilot scale test piece boundary constraint.
In order to realize the utility model discloses a purpose, the utility model discloses a following technical scheme:
a test piece boundary constraint applying device in an anti-lateral-impact experiment comprises a support constraint system for mounting a rod-shaped test piece and an axial loading system for applying axial load to the test piece; the support restraint system comprises a first installation unit and a second installation unit, wherein a first round through hole is formed in the first installation unit, and a first rigid connection end welded with one end of the test piece is installed in the first round through hole or a first hinge end hinged with one end of the test piece is installed in the first round through hole; and a second circular through hole is formed in the second mounting unit, and a second rigid connection end welded with the other end of the test piece is mounted in the second circular through hole or a second hinge end hinged with the other end of the test piece is mounted in the second circular through hole.
The further technical scheme is as follows: the support restraining system comprises a pair of guide rails, a first support and a second support, wherein the first support is fixed on the guide rails, and the second support is arranged on the guide rails in a sliding manner; the first support is provided with a first chuck, the first support and the first chuck form a first mounting unit, and the joint of the first chuck and the first support is provided with a first round through hole; and a second chuck is arranged on the second support, the second support and the second chuck form a second mounting unit, and the joint part of the second chuck and the second support is provided with a second round through hole.
The further technical scheme is as follows: the first rigid connection end and the first hinge end are columnar and are coaxially mounted with the test piece; the inner wall of the first round through hole is provided with grooves and rolling shafts which are uniformly arranged along the axial direction, the grooves and the rolling shafts are arranged at intervals, and the outer side surface of the first hinged end is provided with a bulge matched with the inner groove of the first round through hole;
the second rigid connection end and the second hinge end are columnar and are coaxially mounted with the test piece, limiting bottom plates located outside second circular through holes are welded to the ends, away from the test piece, of the second rigid connection end and the second hinge end respectively, and the size of each limiting bottom plate is larger than the diameter of each second rigid connection end and the diameter of each second hinge end; the second round through hole is internally provided with a groove which is arranged along the axial direction, and the outer side of the second hinged end is provided with a bulge which is matched with the groove in the second round through hole.
The further technical scheme is as follows: the axial loading system comprises a rigid spring, a jack, a first reaction plate, a second reaction plate and a force transfer plate positioned between the first reaction plate and the second reaction plate, wherein the surfaces of the first reaction plate, the second reaction plate and the force transfer plate are respectively and axially vertical to a test piece, the first reaction plate is arranged on a first chuck, the second reaction plate is far away from the first chuck and is fixedly arranged on a guide rail through a vertical rod, the first reaction plate and the second reaction plate are connected through a plurality of connecting rods, the connecting rods vertically penetrate through the force transfer plate, and the force transfer plate is in sliding fit with the connecting rods; the rigid spring is positioned between the force transmission plate and the first reaction plate, one end of the rigid spring is connected with the force transmission plate, and the other end of the rigid spring is connected with the first rigid connection end or the first hinge connection end;
when axial pressure is applied to the test piece, the jack is located between the second reaction plate and the force transfer plate, and the jack jacks the force transfer plate; when axial tension is applied to the test piece, the jack is located between the first reaction plate and the force transfer plate, and the jack jacks the force transfer plate.
The further technical scheme is as follows: the support restraint system also comprises a pair of inclined struts which are positioned on the opposite side surfaces of the second support and positioned right above the pair of guide rails, and two ends of each inclined strut are respectively provided with a lug with a pin bolt hole; a pair of end plates are respectively arranged on the opposite side surfaces of the second support and above the pair of guide rails, a wafer type lug with a pin bolt hole and hinged with one end of the inclined strut is arranged on the surface of each end plate, picking lugs with bolt holes are oppositely arranged on the edges of the end plates, and the end plates are fastened on the second support through the picking lug bolts; the guide rail is provided with a limiting slip sheet which is respectively positioned on the opposite side surfaces of the second support, the guide rail is provided with a plurality of bolt holes for fixing the limiting slip sheet on the guide rail through bolts, and the top of the limiting slip sheet is provided with a butt-clamp type lug which is provided with a bolt hole and is hinged with the other end of the inclined strut.
The further technical scheme is as follows: the bottom of the second support is provided with a U-shaped limiting groove, and the second support slides on the guide rail through the limiting groove; the first chuck is fixed on the first support through a bolt, and the second chuck is fixed on the second support through a bolt.
The further technical scheme is as follows: end plates are welded at two ends of the test piece, and when the test piece is hinged with the first hinged end and the second hinged end, lugs with pin bolt holes are welded on the end plates at the two ends of the test piece; the end parts of the first hinge end and the second hinge end, which are connected with the test piece, are welded with wafer lugs hinged with the lugs.
The further technical scheme is as follows: the outer diameters of the first rigid connection end and the first hinge end are the inner diameter of the first round through hole minus 2 times of the outer diameter of the roller; and the outer diameters of the second rigid connection end and the second hinge end are the inner diameters of the second circular through holes.
The further technical scheme is as follows: the device comprises a test piece and is characterized in that one end of the test piece, which deviates from the first rigid connection end and the first hinge end, is provided with a screw hole, one end of a rigid spring is fixed with a circular plate, a round pipe with threads is welded on the circular plate, the inner diameter of the screw hole is slightly larger than the outer diameter of the round pipe, and the rigid spring is matched with the screw hole through the round pipe to realize fixed connection with the test piece.
The further technical scheme is as follows: the bottom end of the jack is symmetrically provided with lugs with bolt holes, and when axial pressure is applied to the test piece, the jack is fixed on the second reaction plate through a lug-picking bolt at the bottom end of the jack; when axial tension is applied to the test piece, the jack is fixed on the first reaction plate through a lug-raising bolt at the bottom end of the jack.
The beneficial effects of the utility model reside in that:
(1) the utility model discloses in anti side direction impact performance experiment, can exert the tip restraint to rigid coupling, articulated in the plane or the outer articulated test piece in plane, the function is more comprehensive. When end part constraint is applied to a rigid connection test piece, a first rigid connection end is arranged in the first circular through hole, a second rigid connection end is arranged in the second circular through hole, and one end of the test piece is welded with the first rigid connection end while the other end of the test piece is welded with the second rigid connection end; when end part constraint is applied to the in-plane hinged test piece or the out-plane hinged test piece, a first hinged end is installed in the first circular through hole, a second hinged end is installed in the second circular through hole, and one end of the test piece is hinged to the first hinged end, and the other end of the test piece is hinged to the second hinged end.
(2) Distance between first support and the second support is adjustable, can satisfy the experimental requirement of different length test pieces, has the expansibility, and application scope is wider promptly. The first round through hole is formed in the joint of the first support and the first chuck, the second round through hole is formed in the joint of the second support and the second chuck, the joint enables the test piece to be convenient and simple to mount, and the end part constraint condition of the test piece can be set conveniently, and load can be applied to the test piece.
(3) Lay the roller bearing in the first circle through-hole, make first rigid coupling end or first articulated end and test piece axial load and side direction impact load down can take place and keep synchronous axial displacement to the axial load that makes the effect on first rigid coupling end or first articulated end passes the test piece completely. The limiting bottom plates on the second rigid connection end and the second hinge end can prevent the end part of the test piece connected with the second rigid connection end or the second hinge end from generating axial displacement in the process of bearing lateral impact load. The utility model discloses be favorable to further improving the accuracy of experimental result in the anti side direction impact experiment of axial atress test piece.
(4) First articulated end, the articulated end outside of second be equipped with respectively with first round through-hole, second round through-hole inner groovy matched with arch, can insert corresponding position's recess according to realize articulated or the outer articulated needs in plane, cooperate through arch and recess and make the butt clamp formula lug of first articulated end, the articulated end of second retrains in the coplanar the test piece. The utility model discloses simple structure, simple to operate easily dismantles.
(5) Axial loading system passes the axial load to the test piece through stiff spring, and in the very short time of side direction impact load effect, stiff spring can warp along with test piece axial deformation, but the deflection is very little, can keep the invariant of applying the axial load on the test piece basically to ensure the accuracy of experimental result in the anti side direction impact experiment of axial atress test piece. The utility model discloses axial loading system's structure can exert and keep axial pressure or pulling force to the test piece in the impact experiment process to satisfy the requirement of applying of multiple true boundary restraint.
(6) The bracing is used for fixing the second support, after the distance between first support and the second support is confirmed according to test piece length, can pass through the bracing will the second support is fixed in order to prevent that the second support from following the guide rail continues to slide. One end of the inclined strut is hinged to the clamp type lug on the end plate fixed on the second support through the lug, and the other end of the inclined strut is hinged to the clamp type lug arranged on the limiting sliding piece through the lug. The utility model discloses mounting structure is simple, easily dismantles.
(7) Support restraint system links to each other with the test piece through rigid coupling or articulated mode, and the test piece both ends are provided with the end plate in addition, the connection requirement of adaptable different cross-sectional form test piece.
(8) Jack bottom area bolt hole choose the ear the installation of jack of being convenient for, also be convenient for simultaneously according to applying axial tension or pressure to the test piece and change mounted position.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a schematic view of a structure of a limiting groove.
Fig. 3 is a structural diagram of a pair of end plates on the second support.
FIG. 4 is a schematic view of a limiting slider structure.
Fig. 5 is a schematic view of the bracing structure.
Fig. 6 is a schematic structural view of the upper part of the first support.
Fig. 7 is a schematic structural view of the upper part of the second support.
FIG. 8 is a schematic view of a first rigid end head.
Fig. 9 is a schematic view of a first hinge end structure.
FIG. 10 is a schematic view of a second rigid end.
Fig. 11 is a schematic view of a second hinge end structure.
Fig. 12 is a schematic view of the structure of the end of a rigid connection test piece.
Fig. 13 is a schematic view of the end structure of the articulated test piece.
FIG. 14 is a schematic view of an axial loading system configuration (when axial pressure is applied to the test piece).
FIG. 15 is a schematic view of an axial loading system configuration (when axial tension is applied to the test piece).
The designations in the drawings have the following meanings:
1-guide rail, 2-cross beam, 3-diagonal brace, 4-first support, 5-second support, 6-limit groove, 7-first chuck, 8-first rigid joint end, 9-first hinged end, 10-second chuck, 11-second rigid joint end, 12-second hinged end, 13-test piece, 14-jack, 15-first reaction plate, 16-second reaction plate, 17-force transmission plate, 18-rigid spring, 19-vertical rod, 20-connecting rod, 21-first round through hole, 22-second round through hole, 23-groove, 24-rolling shaft, 25-screw hole, 26-bulge, 27-clamp lug, 28-end plate, 29-lug and 30-round plate, 31-round tube, 32-lug, 33-limit slide sheet and 34-limit bottom plate.
Detailed Description
The technical scheme of the utility model is explained more specifically with the embodiment as follows:
the utility model discloses an axial loading system and be used for installing the support restraint system of shaft-like test piece 13, test piece 13 end connection has the coaxial stiff spring 18 of arranging, axial loading system passes through stiff spring 18 to axial load is applyed to test piece 13.
The support restraint system comprises a pair of guide rails 1, a first support 4 and a second support 5, wherein the first support 4 is fixed on the guide rails 1, the second support 5 is installed on the guide rails 1 in a sliding mode, a first chuck 7 used for restraining one end of a test piece 13 is installed on the first support 4, and a second chuck 10 used for restraining the other end of the test piece 13 is installed on the second support 5.
A first circular through hole 21 is formed in a joint of the first chuck 7 and the first support 4, a first rigid connection end 8 welded to one end of the test piece 13 is installed in the first circular through hole 21, or a first hinge end 9 hinged to one end of the test piece 13 is installed in the first circular through hole 21, and the first rigid connection end 8 and the first hinge end 9 are columnar and are coaxially installed with the test piece 13; the inner wall of the first round through hole 21 is provided with grooves 23 and rollers 24 which are uniformly arranged along the axial direction, the grooves 23 and the rollers 24 are arranged at intervals, and the outer side surface of the first hinged end 9 is provided with a bulge 26 which is matched with the grooves 23 in the first round through hole 21; one ends of the first rigid connection end 8 and the first hinge end 9, which are far away from the test piece 13, are provided with screw holes 25, one end of the rigid spring 18 is fixed with a circular plate 30, a circular tube 31 with threads is welded on the circular plate 30, and the inner diameter of each screw hole 25 is slightly larger than the outer diameter of the circular tube 31 so as to facilitate the fastening of the circular tube 31 and the screw hole 25, namely, the rigid spring 18 is fixedly connected with the test piece 13 by the matching of the circular tube 31 and the screw hole 25;
a second circular through hole 22 is formed in a joint of the second chuck 10 and the second support 5, a second rigid connection end 11 welded to the other end of the test piece 13 is installed in the second circular through hole 22, or a second hinge end 12 hinged to the other end of the test piece 13 is installed in the second circular through hole 22, the second rigid connection end 11 and the second hinge end 12 are columnar and are coaxially installed with the test piece 13, a limit bottom plate 34 located outside the second circular through hole 22 is welded to one end, away from the test piece 13, of each of the second rigid connection end 11 and the second hinge end 12, and the size of the limit bottom plate 34 is larger than the diameter of each of the second rigid connection end 11 and the second hinge end 12; the second round through hole 22 is internally provided with a groove 23 which is arranged along the axial direction, and the outer side of the second hinged end 12 is provided with a bulge 26 which is matched with the groove 23 in the second round through hole 22.
The axial loading system comprises a jack 14, a first reaction plate 15, a second reaction plate 16 and a force transfer plate 17 positioned between the first reaction plate 15 and the second reaction plate 16, the plate surfaces of the first reaction plate 15, the second reaction plate 16 and the force transfer plate 17 are respectively vertical to the length direction of the guide rail 1, the first reaction plate 15 is installed on a first chuck 7, the second reaction plate 16 is far away from the first chuck 7 and is installed and fixed on the guide rail 1 through a vertical rod 19, the first reaction plate 15 and the second reaction plate 16 are connected through a plurality of connecting rods 20, the connecting rods 20 vertically penetrate through the force transfer plate 17, and the force transfer plate 17 is in sliding fit with the connecting rods 20; the rigid spring 18 is positioned between the force transmission plate 17 and the first reaction plate 15, one end of the rigid spring 18 is connected with the force transmission plate 17, and the other end of the rigid spring 18 is connected with the test piece 13;
when axial pressure is applied to the test piece 13, the jack 14 is positioned between the second reaction plate 16 and the force transfer plate 17, and the jack 14 jacks the force transfer plate 17; when an axial tensile force is applied to the test piece 13, the jack 14 is located between the first reaction plate 15 and the force transfer plate 17, and the jack 14 jacks the force transfer plate 17.
The support restraint system also comprises a pair of inclined struts 3 which are positioned on the opposite side surfaces of the second support 5 and are positioned right above the pair of guide rails 1, and two ends of each inclined strut 3 are respectively provided with a lug 32 with a pin bolt hole; a pair of end plates 28 are respectively arranged on the opposite side surfaces of the second support 5 and at positions right above the pair of guide rails 1, a wafer-type lug 27 with a pin bolt hole and hinged with one end of the inclined strut 3 is arranged on the surface of the end plate 28, picking lugs 29 with bolt holes are arranged at the edges of the end plates 28 in an opposite mode, and the end plates 28 are fastened on the second support 5 through the picking lugs 29 by bolts; the guide rail 1 is provided with a limiting slip sheet 33 which is respectively positioned on the opposite side surfaces of the second support 5, the guide rail 1 is provided with a plurality of bolt holes for fixing the limiting slip sheet 33 on the guide rail 1 through bolts, and the top of the limiting slip sheet 33 is provided with a wafer type lug 27 which is provided with a bolt hole and is hinged with the other end of the inclined strut 3.
The bottom of the second support 5 is provided with a U-shaped limiting groove 6, and the second support 5 slides on the guide rail 1 through the limiting groove 6; the first clamp 7 is fixed on the first support 4 by bolts, and the second clamp 10 is fixed on the second support 5 by bolts.
End plates 28 are welded at two ends of the test piece 13, and when the test piece 13 is hinged with the first hinge end 9 and the second hinge end 12, lugs 32 with pin bolt holes are welded on the end plates 28 at two ends of the test piece 13; the end parts of the first hinge end 9 and the second hinge end 12 connected with the test piece 13 are welded with wafer lugs 27 hinged with the lugs 32.
The outer diameters of the first rigid connection end 8 and the first hinge end 9 are the inner diameter of the first round through hole 21 minus 2 times of the outer diameter of the roller 24; the outer diameters of the second rigid connection end 11 and the second hinge end 12 are the inner diameter of the second circular through hole 22.
The bottom end of the jack 14 is symmetrically provided with a lifting lug 29 with a bolt hole, and when axial pressure is applied to the test piece 13, the jack 14 is fixed on the second reaction plate 16 through the lifting lug 29 at the bottom end of the jack by bolts; when an axial tensile force is applied to the test piece 13, the jack 14 is bolted to the first reaction plate 15 through the lifting lug 29 at the bottom end of the jack.
The utility model discloses application method includes following step:
step 1, setting an axial loading system according to the axial load requirement. When axial pressure is applied to the test piece, the bottom end of the jack 14 is fastened with the second counterforce plate 16, and the top end of the jack is abutted against the force transmission plate 17; when an axial tensile force is applied to the test piece, the bottom end of the jack 14 is fastened with the first reaction plate 15, and the top end abuts against the force transmission plate 17.
And 2, setting a support restraint system according to the restraint requirement of the end part of the test piece.
When a test piece is rigidly connected, after a first rigid connection end 8 is fastened with a circular tube 31 at the end part of a rigid spring 18, a clamping section of the first rigid connection end 8 is placed in a first circular through hole 21, a first chuck 7 is fastened by a bolt, a clamping section of a second rigid connection end 11 is placed in a second circular through hole 22, a bottom plate 34 is placed outside the second circular through hole 22, and a second chuck 10 is fastened by a bolt;
when the test piece is hinged in the plane, after the first hinged end 9 is fastened with the circular tube 31 at the end part of the rigid spring 18, the clamping section of the first hinged end 9 is placed in the first circular through hole 21, and the bulges 26 at the two sides are inserted into the grooves 23 parallel to the direction of the impact load (namely, the plane where the pair of grooves 23 which are oppositely arranged is parallel to the direction of the impact load); placing the clamping section of the second hinged end 12 into the second circular through hole 22, placing the bottom plate 34 outside the second circular through hole 22, and inserting the protrusions 26 at two sides into the grooves 23 parallel to the direction of the impact load (i.e. the plane of the pair of oppositely arranged grooves 23 is parallel to the direction of the impact load);
when the test piece is hinged out of the plane, after the first hinged end 9 is fastened with the circular tube 31 at the end part of the rigid spring 18, the clamping section of the first hinged end 9 is placed into the first circular through hole 21, and the bulges 26 at the two sides are inserted into the grooves 23 vertical to the direction of the impact load (namely, the plane where the pair of grooves 23 which are oppositely arranged is vertical to the direction of the impact load); the clamping section of the second hinged end 12 is placed in the second circular through hole 22, the bottom plate 34 is placed outside the second circular through hole 22, and the protrusions 26 at two sides are inserted into the grooves 23 perpendicular to the direction of the impact load (i.e., the plane of the pair of oppositely arranged grooves 23 is perpendicular to the direction of the impact load).
When the impact load direction is in the same plane with the plane of the hinge formed by the hinged end, the hinge is in-plane hinge, and when the impact load direction is perpendicular to the plane of the hinge formed by the hinged end, the hinge is out-of-plane hinge.
Step 3, moving the second support 5 to a proper position, and respectively welding the end plates 28 at two ends of the test piece 13 with the first rigid connection end 8 and the second rigid connection end 11 when the test piece is in rigid connection; when the test piece is hinged, lugs 32 at two ends of the test piece 13 are respectively connected with the wafer-type lugs 27 of the first hinge end 9 and the second hinge end 12 through pin bolts;
step 4, connecting lugs 32 at two ends of the inclined strut 3 with the second support 5 and the wafer-type lugs 27 on the limiting slide sheet 33 respectively by using pin bolts, fastening the limiting slide sheet 33 on the guide rail 1 by using bolts, and fixing the second support 5;
and 5, starting the hydraulic equipment, enabling the jack 14 to push the force transfer plate 17 to a proper position, enabling the load generated by the deformation of the rigid spring 18 to be equal to the axial load of the test piece to be applied, keeping the deformation of the rigid spring 18 constant, completing the boundary constraint application of the test piece 13, and preparing to apply lateral impact load.
Claims (10)
1. The utility model provides a test piece boundary constraint application device in anti side impact experiment which characterized in that: comprises a support restraining system for mounting a rod-shaped test piece (13) and an axial loading system for applying an axial load to the test piece (13); the support restraint system comprises a first mounting unit and a second mounting unit, a first round through hole (21) is formed in the first mounting unit, a first rigid connection end (8) welded with one end of the test piece (13) is installed in the first round through hole (21), or a first hinge end (9) hinged with one end of the test piece (13) is installed in the first round through hole (21); and a second round through hole (22) is formed in the second mounting unit, and a second rigid connection end (11) welded to the other end of the test piece (13) is installed in the second round through hole (22) or a second hinge end (12) hinged to the other end of the test piece (13) is installed in the second round through hole (22).
2. The test piece boundary constraint applying device in the lateral impact resistance experiment as recited in claim 1, wherein: the support restraint system comprises a pair of guide rails (1), a first support (4) and a second support (5), wherein the first support (4) is fixed on the guide rails (1), and the second support (5) is arranged on the guide rails (1) in a sliding manner; a first chuck (7) is mounted on the first support (4), the first support (4) and the first chuck (7) form a first mounting unit, and a first round through hole (21) is formed in the joint of the first chuck (7) and the first support (4); the second support (5) is provided with a second chuck (10), the second support (5) and the second chuck (10) form a second mounting unit, and the joint of the second chuck (10) and the second support (5) is provided with a second round through hole (22).
3. The test piece boundary constraint applying device in the lateral impact resistance experiment as recited in claim 1, wherein: the first rigid connection end (8) and the first hinge end (9) are columnar and are coaxially mounted with the test piece (13); the inner wall of the first round through hole (21) is provided with grooves (23) and rollers (24) which are uniformly arranged along the axial direction, the grooves (23) and the rollers (24) are arranged at intervals, and the outer side surface of the first hinged end (9) is provided with protrusions (26) matched with the grooves (23) in the first round through hole (21);
the second rigid connection end (11) and the second hinge end (12) are columnar and are coaxially mounted with the test piece (13), one ends of the second rigid connection end (11) and the second hinge end (12) departing from the test piece (13) are respectively welded with a limiting bottom plate (34) positioned outside the second circular through hole (22), and the size of the limiting bottom plate (34) is larger than the diameters of the second rigid connection end (11) and the second hinge end (12); the second round through hole (22) is internally provided with a groove (23) which is arranged along the axial direction, and the outer side of the second hinged end (12) is provided with a bulge (26) which is matched with the groove (23) in the second round through hole (22).
4. The test piece boundary constraint applying device in the lateral impact resistance experiment as recited in claim 2, wherein: the axial loading system comprises a rigid spring (18), a jack (14), a first reaction plate (15), a second reaction plate (16) and a force transfer plate (17) positioned between the first reaction plate (15) and the second reaction plate (16), the surfaces of the first reaction plate (15), the second reaction plate (16) and the force transfer plate (17) are respectively and axially vertical to a test piece (13), the first reaction plate (15) is installed on a first chuck (7), the second reaction plate (16) is far away from the first chuck (7) and is installed and fixed on a guide rail (1) through a vertical rod (19), the first reaction plate (15) and the second reaction plate (16) are connected through a plurality of connecting rods (20), and the connecting rods (20) vertically penetrate through the force transfer plate (17), and the force transfer plate (17) is in sliding fit with the connecting rods (20); the rigid spring (18) is positioned between the force transmission plate (17) and the first reaction plate (15), one end of the rigid spring (18) is connected with the force transmission plate (17), and the other end of the rigid spring (18) is connected with the first rigid connection end (8) or the first hinge connection end (9);
when axial pressure is applied to the test piece (13), the jack (14) is located between the second reaction plate (16) and the force transfer plate (17) and the jack (14) jacks the force transfer plate (17); when axial tension is applied to the test piece (13), the jack (14) is located between the first reaction plate (15) and the force transfer plate (17), and the jack (14) jacks the force transfer plate (17).
5. The test piece boundary constraint applying device in the lateral impact resistance experiment as recited in claim 2, wherein: the support restraint system also comprises a pair of inclined struts (3) which are positioned on the opposite side surfaces of the second support (5) and are positioned right above the pair of guide rails (1), and two ends of each inclined strut (3) are respectively provided with a lug (32) with a pin bolt hole; a pair of end plates (28) are respectively arranged on opposite side surfaces of the second support (5) and positions right above the pair of guide rails (1), a wafer type lug (27) with a pin bolt hole and hinged with one end of the inclined strut (3) is arranged on the surface of each end plate (28), oppositely arranged lugs (29) with a bolt hole are arranged on the edge of each end plate (28), and the end plates (28) are fastened on the second support (5) through the lugs (29) by bolts; be equipped with on guide rail (1) and be located respectively spacing gleitbretter (33) of second support (5) opposite flank, leave on guide rail (1) will spacing gleitbretter (33) bolt fastening be in a plurality of bolt holes on guide rail (1), spacing gleitbretter (33) top be equipped with take the cotter hole and with bracing (3) other end articulated wafer formula lug (27).
6. The test piece boundary constraint applying device in the lateral impact resistance experiment as recited in claim 2, wherein: the bottom of the second support (5) is provided with a U-shaped limiting groove (6), and the second support (5) slides on the guide rail (1) through the limiting groove (6); the first clamping head (7) is fixed on the first support (4) through a bolt, and the second clamping head (10) is fixed on the second support (5) through a bolt.
7. The test piece boundary constraint applying device in the lateral impact resistance experiment as recited in claim 3, wherein: end plates (28) are welded at two ends of the test piece (13), and when the test piece (13) is hinged with the first hinged end (9) and the second hinged end (12), lugs (32) with pin bolt holes are welded on the end plates (28) at two ends of the test piece (13); the end parts of the first hinge end (9) and the second hinge end (12) connected with the test piece (13) are welded with wafer lugs (27) hinged with the lugs (32).
8. The test piece boundary constraint applying device in the lateral impact resistance experiment as recited in claim 3, wherein: the outer diameters of the first rigid connection end (8) and the first hinge end (9) are the inner diameter of the first circular through hole (21) minus 2 times of the outer diameter of the roller (24); the outer diameters of the second rigid connection end (11) and the second hinge end (12) are the inner diameters of the second circular through holes (22).
9. The test piece boundary constraint applying device in the lateral impact resistance experiment as recited in claim 4, wherein: first rigid connection end (8), deviating from of first articulated end (9) the one end of test piece (13) is equipped with screw (25), the one end of stiff spring (18) is fixed with plectane (30), the welding has threaded pipe (31) on plectane (30), the internal diameter of screw (25) is slightly more than the external diameter of pipe (31), stiff spring (18) pass through pipe (31) with screw (25) cooperate and realize with test piece (13) fixed connection.
10. The test piece boundary constraint applying device in the lateral impact resistance experiment as recited in claim 4, wherein: the bottom end of the jack (14) is symmetrically provided with lifting lugs (29) with bolt holes, and when axial pressure is applied to the test piece (13), the jack (14) is fixed on the second reaction plate (16) through the lifting lugs (29) at the bottom end of the jack by bolts; when axial tension is applied to the test piece (13), the jack (14) is fixed on the first reaction plate (15) through a lug (29) at the bottom end of the jack in a bolt mode.
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| CN201920067145.1U CN209820911U (en) | 2019-01-16 | 2019-01-16 | Device is applyed to test piece boundary constraint in anti side impact experiment |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109781503A (en) * | 2019-01-16 | 2019-05-21 | 合肥工业大学 | A kind of anti-side test specimen boundary constraint bringing device into impact experiment |
| CN112781979A (en) * | 2021-02-03 | 2021-05-11 | 中煤科工开采研究院有限公司 | Testing method of anchor rod lateral impact test bed |
| CN112903482A (en) * | 2021-02-03 | 2021-06-04 | 中煤科工开采研究院有限公司 | Multifunctional test bed for testing impact load of mining support material and test method |
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2019
- 2019-01-16 CN CN201920067145.1U patent/CN209820911U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109781503A (en) * | 2019-01-16 | 2019-05-21 | 合肥工业大学 | A kind of anti-side test specimen boundary constraint bringing device into impact experiment |
| CN109781503B (en) * | 2019-01-16 | 2024-02-13 | 合肥工业大学 | Test piece boundary constraint applying device in lateral impact resistance experiment |
| CN112781979A (en) * | 2021-02-03 | 2021-05-11 | 中煤科工开采研究院有限公司 | Testing method of anchor rod lateral impact test bed |
| CN112903482A (en) * | 2021-02-03 | 2021-06-04 | 中煤科工开采研究院有限公司 | Multifunctional test bed for testing impact load of mining support material and test method |
| WO2022165990A1 (en) * | 2021-02-03 | 2022-08-11 | 中煤科工开采研究院有限公司 | Multifunctional test bench for impact load testing of mining support material and test method |
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