CN102607834B - Fatigue testing device capable of synchronously loading loads in three directions for structural test piece - Google Patents
Fatigue testing device capable of synchronously loading loads in three directions for structural test piece Download PDFInfo
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Abstract
The invention relates to a fatigue testing device capable of synchronously loading loads in three directions for a structural test piece. The fatigue testing device comprises a base supporting frame, wherein the base supporting frame is used for being fixedly connected with the ground; and the fatigue testing device further comprises a set of transverse force exerting devices and transverse clamping devices, a set of longitudinal force exerting devices and longitudinal trimming devices, a set of circumferential force exerting devices, a set of upper transverse rolling combination devices and a set of lower transverse rolling combination devices, wherein the transverse force exerting devices, the longitudinal force exerting devices and the circumferential force exerting devices are used for exerting testing forces to the test piece through a conventional one-way fatigue actuator. According to the invention, loading fatigue tests in three directions can be performed on the structural test piece at the same time, and mechanic characteristics of a typical welding structure of a pressure container under the exertion of three-directional loads of a bending combination can be simulated more actually; and the fatigue testing device capable of synchronously loading loads in three directions has the advantages that: the fatigue testing device is simple and practical, and is easy to understand and implement; and as loads in different directions are controlled by different loading devices, load values in various directions can be loaded in three directions without mutual interference, and a three-directional non-proportional loading fatigue test can be carried out as long as loading equipment allows.
Description
Technical field
The present invention relates to structure three-dimensional fatigue experiment and load frock, is a kind of for the synchronous fatigue experimental device loading of structure three-dimensional load specifically, and three directions are respectively transverse curvature, longitudinal compression and circumferentially compression, belong to experimental facilities, experimental assembly field.
Background technology
Welded steel structure is widely used at most industrial circle such as Aero-Space, machinery, electric power, chemical industry, skyscraper, oceanographic engineering.In structure, the importance of fatigue problem constantly increases, so the torture test technology under the multidirectional Cyclic Load of typical structure has important effect.
At present, very ripe to unidirectional tired actuator and control system thereof both at home and abroad, so as long as there is a set of rational three-dimensional loading fatigue test frock, by using conventional unidirectional tired actuator can complete complicated Multidirectional synchronous loading fatigue test.
Summary of the invention
Technical matters to be solved by this invention is to propose a kind of fatigue experimental device simultaneously loading for structure test specimen three-dimensional load for above-mentioned the deficiencies in the prior art
,welding piece is applied to two to pressure load and to bending load simultaneously.
The present invention solves the problems of the technologies described above adopted technical scheme: a kind of fatigue experimental device simultaneously loading for structure test specimen three-dimensional load, comprise base supports frame, in order to be fixedly connected with ground, characterized by further comprising a set of horizontal force application apparatus and horizontal clamping device, a set of longitudinal force application apparatus and longitudinal micromatic setting, a set of circumferential force application apparatus and the horizontal rolling combination unit of upper and lower two cover, three direction force application apparatus all complete applying specimen test power by conventional unidirectional tired actuator;
Described horizontal force application apparatus comprises horizontal application of force actuator and horizontal application of force connector, laterally application of force connector one end is connected with horizontal application of force actuator, the other end is for directly contacting with test specimen, the one end wherein contacting with test specimen is circular-arc, take that to reach the transverse test power that test specimen is applied be linear load, laterally clamping device includes two pairs of laterally clamping bearings, laterally clamping bearing is fixed on the horizontal specific clamping plate of base supports frame, horizontal specific clamping plate are welded in respectively on the T-shaped face plate on base supports frame and are formed by two groups of steel plates that have up and down a U-shaped groove, two pairs laterally clamp bearing and successively penetrate from U-shaped groove, and fix with the bolt at bearing two ends, described two couple laterally clamping bearing clamps test specimen in transverse test line of force symmetria bilateralis position, transversal displacement with restriction test specimen bite position, the test force that laterally application of force connector applies test specimen mid point and laterally clamping bearing form the three-point bending of test specimen at the limiting displacement at test specimen two ends,
Described longitudinal force application apparatus includes longitudinal application of force actuator and two longitudinal application of force connectors, one end of one of them longitudinal application of force connector is connected with longitudinal application of force actuator, the other end and test specimen one end in contact, another longitudinal application of force connector one end is connected with longitudinal micromatic setting, the other end contacts with the test specimen other end, wherein longitudinal both ends of test specimen are cylindrical arcuation, longitudinally the surface of contact of application of force connector and test specimen is interior circular-arc, take and guarantee that longitudinal application of force connector and test specimen contact as line, when longitudinally application of force actuator applies test force to test specimen, longitudinally the ground surface end that is fixed on of micromatic setting produces support reaction, to complete, longitudinal two ends of test specimen are applied to the longitudinally test pressure of center line,
Described circumferential force application apparatus includes circumferential application of force actuator, described horizontal rolling combination unit, it includes tourelle pedestal, tourelle contiguous block, tourelle clamping plate and tourelle roller bearing, wherein the upper surface of the tourelle pedestal of the horizontal rolling combination unit of top is connected with circumferential application of force actuator, the lower surface of the tourelle pedestal of the horizontal rolling combination unit of below is connected with base supports frame upper surface, tourelle contiguous block is for directly contacting with test specimen, tourelle roller bearing is fixed between tourelle pedestal and tourelle contiguous block, to roll within the specific limits, tourelle clamping plate are used for fixedly tourelle contiguous block and tourelle pedestal.
Press such scheme, described base supports frame also includes base supports frame transverse fine-adjusting device, it is comprised of a trapezoid block and two wedges, the cooperation of two wedges by trapezoid block and trapezoid block both sides is adjusted base supports frame along horizontal position, to reach longitudinal force application apparatus and circumferentially force application apparatus and the horizontal centering of test specimen.
Press such scheme, described longitudinal micromatic setting includes inner splint, external splint, fixedly trapezoid block and movable trapezoid block, inner splint is connected with longitudinal application of force connector, inside and outside clamping plate by bolt, connect and inside and outside clamping plate between there is a fixed gap, fixedly trapezoid block and movable trapezoid block are between inside and outside clamping plate, by promoting, movable trapezoid block is adjusted inner splint and the position of longitudinal application of force connector of being attached thereto, to complete the longitudinal centering adjustment of test specimen.
Press such scheme, described horizontal force application apparatus and longitudinally force application apparatus are all arranged horizontally, and the longitudinal centre line of its center line and test specimen is on same surface level, laterally the center line of force application apparatus is vertical with test specimen longitudinal centre line, longitudinally the center line of force application apparatus and test specimen longitudinal centre line are on same straight line, and laterally force application apparatus is orthogonal with the center line of longitudinal force application apparatus; Described circumferential force application apparatus is vertically arranged above test specimen, circumferentially the center line of force application apparatus is perpendicular to test specimen longitudinal centre line, and intersect at test specimen longitudinal centre line mid point, laterally force application apparatus, longitudinal force application apparatus and circumferential force application apparatus are mutually vertically arranged between two.
Horizontal force application apparatus of the present invention is laterally exerted pressure to the longitudinal Mean section of test specimen place along test specimen, the horizontal clamping device being positioned on base supports frame clamps at test specimen two ends, with the transversal displacement of restriction bite, form test specimen along horizontal three-point bending with horizontal force application apparatus applied pressure; Longitudinally force application apparatus directly contacts with the longitudinal two ends of test specimen, along test specimen, longitudinally apply test pressure, longitudinally micromatic setting is adjusted the longitudinal centering of test specimen by controlling the surface of contact position contacting with test specimen longitudinal end, reaches horizontal force application apparatus and the test force of test specimen is acted on longitudinal midsection of test specimen with circumferential force application apparatus; Circumferentially force application apparatus is arranged vertically, and along test specimen circumferential direction, applies test pressure, and the combination unit that laterally rolls is arranged between circumferential force application apparatus and test specimen surface of contact, the friction force while reducing test piece deformation in loading procedure between circumferential force application apparatus and test specimen;
Base supports frame of the present invention, for fixed lateral clamping device and horizontal rolling combination unit, by base supports frame transverse fine-adjusting device, adjust the lateral attitude of base supports frame, reach longitudinal force application apparatus and the test force of test specimen is acted on the horizontal midsection of test specimen with circumferential force application apparatus;
By horizontal force application apparatus, longitudinal force application apparatus, circumferential force application apparatus and base supports frame, realize the three-dimensional loading fatigue test that welding piece is applied to transverse curvature, longitudinal and circumferential compression test power.
Beneficial effect of the present invention is: structure test specimen three-dimensional loading fatigue test frock of the present invention, can to structure test specimen, carry out three-dimensional loading fatigue test simultaneously, analogue pressure vessel typical case welded structure is subject to the stress characteristic of Subjected To Combined Axial Loading And Bending three-dimensional load more truly, and its advantage is: install fairly simple, practical, easy to understand, be easy to realization; Because the load of different directions is controlled by different chargers, so can complete the non-interfering three-dimensional of all directions load value, load, and as long as loading equipemtn allows, can carry out three-dimensional disproportional loading fatigue test.
Accompanying drawing explanation
Fig. 1 frock schematic front view of the present invention;
Fig. 2 frock diagrammatic top view of the present invention;
Fig. 3 frock diagrammatic side view of the present invention;
Fig. 4 is base supports rack device front view of the present invention;
Fig. 5 is base supports rack device side view of the present invention;
Fig. 6 is base supports rack device vertical view of the present invention;
Fig. 7 combination unit front view that laterally rolls;
Fig. 8 combination unit side view that laterally rolls;
Fig. 9 combination unit vertical view that laterally rolls;
Figure 10 laterally clamps bearing schematic diagram;
In figure: 1, base supports frame, 2, horizontal application of force actuator, 3, laterally clamp bearing, 4, horizontal application of force connector.5, longitudinal application of force actuator, 6, longitudinal application of force connector, 7, longitudinal micromatic setting, 8, circumferential application of force actuator, 9, the horizontal combination unit that rolls, 10, tourelle pedestal, 11, tourelle contiguous block, 12 tourelle clamping plate, 13, tourelle roller bearing, 14, base supports frame transverse fine-adjusting device, 15, horizontal specific clamping plate, 16, inner splint, 17, external splint, 18, fixing trapezoid block, 19, movable trapezoid block.
Embodiment
By embodiment, also the invention will be further described by reference to the accompanying drawings.
From accompanying drawing, can find out, the present invention is for structure test specimen three-dimensional fatigue experiment loads frock, mainly comprises laterally fatigue loading force application apparatus and the corresponding utility appliance thereof of (along specimen thickness direction), longitudinal (along test specimen length direction) and circumferential (along specimen width direction) three directions.
A kind of fatigue experimental device simultaneously loading for structure test specimen three-dimensional load, comprise base supports frame 1, in order to be fixedly connected with ground, also include a set of horizontal force application apparatus and horizontal clamping device, a set of longitudinal force application apparatus and longitudinal micromatic setting 7, a set of circumferential force application apparatus and 9, three direction force application apparatus of the upper and lower two horizontal rolling combination units of cover and all by conventional unidirectional tired actuator, complete applying specimen test power;
Laterally force application apparatus comprises horizontal application of force actuator 2 and horizontal application of force connector 4, laterally application of force connector 4 one end are connected with horizontal application of force actuator 2, the other end is for directly contacting with test specimen, the one end wherein contacting with test specimen is circular-arc, take that to reach the transverse test power that test specimen is applied be linear load
Laterally clamping device includes two pairs of laterally clamping bearings 3, laterally clamping bearing 3 is fixed on the horizontal specific clamping plate 15 of base supports frame 1, horizontal specific clamping plate 15 are welded in respectively on the T-shaped face plate on base supports frame and are formed by two groups of steel plates that have up and down a U-shaped groove, two pairs laterally clamp bearing and successively penetrate from U-shaped groove, and fix with the bolt at bearing two ends, two pairs laterally clamp bearing and in transverse test line of force symmetria bilateralis position, test specimen are clamped, the transversal displacement at restriction test specimen bite position, limit direction and laterally to apply test force direction consistent, the horizontal clamping bearing of the single-point test force that laterally 4 pairs of test specimen mid points of horizontal application of force connector of force application apparatus apply and laterally clamping device forms the three-point bending of test specimen at the limiting displacement at test specimen two ends, thereby imitation specimen is subject to the situation of transverse curvature load,
As shown in Figure 2, there are a set of longitudinal force application apparatus and longitudinal micromatic setting 7, longitudinally force application apparatus comprises longitudinal application of force actuator 5 and two longitudinal application of force connectors 6, longitudinal application of force connector 6 one end are connected with longitudinal application of force actuator 5, the longitudinal end in contact of one end and test specimen, another longitudinal application of force connector 6 one end are connected with longitudinal micromatic setting 7, one end contacts with the longitudinal other end of test specimen, wherein the longitudinal both ends of test specimen are cylindrical arcuation, longitudinally application of force connector 6 is interior circular-arc with the surface of contact of test specimen, take and guarantee that longitudinal application of force connector 6 and test specimen contact as line, longitudinally micromatic setting 7 one end are connected with longitudinal application of force connector 6, one end is fixed, when longitudinally 5 pairs of test specimens of application of force actuator apply test force, longitudinally the stiff end of micromatic setting 7 produces support reaction, to complete, the longitudinal two ends of welding piece are applied to the longitudinally test pressure of center line,
Longitudinally micromatic setting 7 comprises inner splint 16, external splint 17, fixedly trapezoid block 18 and movable trapezoid block 19, external splint 17 is connected with stationary installation for fixing a whole set of longitudinally micromatic setting, inner splint 16 is connected with longitudinal application of force connector 6, inside and outside clamping plate by bolt, connect and inside and outside clamping plate between there is a fixed gap, fixedly trapezoid block 18 and movable trapezoid block 19 are between inside and outside clamping plate, by promoting, movable trapezoid block 19 is adjusted inner splints 16 and the position of longitudinal application of force connector 6 of being attached thereto, to complete the longitudinal centering adjustment of test specimen;
As shown in Figure 3, there are a set of circumferential force application apparatus and the horizontal rolling combination unit of upper and lower two cover, circumferentially force application apparatus is mainly circumferential application of force actuator 8, vertical layout, test specimen is applied to circumferential test force, horizontal rolling combination unit 9 forms of upper and lower two cover are identical, include tourelle pedestal 10, tourelle contiguous block 11, tourelle clamping plate 12 and tourelle roller bearing 13, the upper surface of the tourelle pedestal 10 of the horizontal rolling combination unit of top is connected with circumferential application of force actuator 8, the lower surface of the tourelle pedestal 10 of the horizontal rolling combination unit of below is connected with base supports frame 1 upper surface, tourelle contiguous block 11 directly contacts with test specimen, tourelle roller bearing 13 is fixed between tourelle pedestal 10 and tourelle contiguous block 11, can roll within the specific limits, tourelle clamping plate 12 are for fixedly tourelle contiguous block 11 and tourelle pedestal 10, so laterally roll, combination unit 9 is for circumferentially between application of force actuator 8 and test specimen, the friction force between circumferential force application apparatus and test specimen, test being exerted an influence when reducing test piece deformation in loading procedure,
There is a base supports frame 1, be connected with ground, for fixed lateral clamping bearing 3 and a horizontal rolling combination unit 9, and comprise base supports frame transverse fine-adjusting device 14, it is comprised of a trapezoid block and two wedges, the cooperation of two wedges by trapezoid block and trapezoid block both sides is adjusted base supports frame along horizontal position, to reach longitudinal force application apparatus and circumferentially force application apparatus and the horizontal centering of test specimen.By the horizontal force application apparatus of design, longitudinal force application apparatus, circumferential force application apparatus, base supports frame and corresponding equipment, can realize the three-dimensional loading fatigue test of transverse curvature, longitudinal pressure and circumferential pressure to welding piece.
Laterally force application apparatus and longitudinal force application apparatus are all arranged horizontally, and the longitudinal centre line of its center line and test specimen is on same surface level, laterally the center line of force application apparatus is vertical with test specimen longitudinal centre line, longitudinally the center line of force application apparatus and test specimen longitudinal centre line are on same straight line, and laterally force application apparatus is orthogonal with the center line of longitudinal force application apparatus; Described circumferential force application apparatus is vertically arranged above test specimen, circumferentially the center line of force application apparatus is perpendicular to test specimen longitudinal centre line, and intersect at test specimen longitudinal centre line mid point, laterally force application apparatus, longitudinal force application apparatus and circumferential force application apparatus are mutually vertically arranged between two.
The present invention is when assembling, base supports frame 1 is tentatively connected to (integral body fine setting is carried out in assembling again after completing) by bolt with ground, be used for fixing other devices, to laterally clamp on the horizontal specific clamping plate 15 of bearing 3 fixed pedestal bracing frames 1, test specimen is fixed between clamping bearing, the transversal displacement of restriction test piece end, a set of horizontal rolling combination unit 9 is fixed on to base supports frame 1 upper surface, tourelle contiguous block 11 vertically supports test specimen at longitudinal mid point of test specimen, as shown in frock schematic diagram; The longitudinal centre line mid point that should guarantee test specimen while arranging test specimen is on the center line of base supports frame 1, in addition, because base supports frame 1 and horizontal clamping bearing 3 are of a size of determined value, so after completing being connected and fixed of horizontal clamping device 3 and the test specimen fixing and base supports frame 1 on base supports frame 1 and ground, can be the location that baseline carries out horizontal force application apparatus and longitudinal force application apparatus according to base supports frame center line and test specimen longitudinal centre line, two center lines be vertical each other; Horizontal application of force connector 4 is connected with horizontal application of force actuator 2, the center line (line at the longitudinal mid point of test specimen place) of base supports frame 1 of take is located horizontal force application apparatus as baseline, guarantee that horizontal force application apparatus (comprising horizontal application of force actuator 2 and horizontal application of force connector 2) is horizontally disposed, the center line of center line and base supports frame 1 is on same straight line, laterally application of force connector 4 contacts with the longitudinal Mean section line of test specimen, fixed lateral force application apparatus, for applying the horizontal test force of test specimen; A longitudinal application of force connector 6 is connected with longitudinal application of force actuator 5, another is connected with the inner splint 16 in micromatic setting 7, the test specimen longitudinal centre line of take is located longitudinal force application apparatus as baseline, guarantee that longitudinal force application apparatus (comprising longitudinal application of force actuator 5 and longitudinal application of force connector 6) and longitudinal micromatic setting 7 are horizontally disposed, center line and test specimen center line are on same straight line, longitudinally application of force connector 6 respectively with longitudinal two end in contact of test specimen, fixing longitudinal force application apparatus and longitudinally micromatic setting 7, for applying test force longitudinally to test specimen; A set of horizontal rolling combination unit 9 is connected with circumferential application of force actuator 8 in addition, circumferentially actuator 8 is arranged vertically with horizontal rolling combination unit 9, article two, center line is on same straight line, and center line is crossed the intersection point of the center line of horizontal force application apparatus and the center line of longitudinal force application apparatus
Fixing circumferential force application apparatus and laterally rolling combination unit, apply circumferential test force with the lateral rolling device acting in conjunction on base supports frame to test specimen.Each is after force application apparatus has been arranged, by regulating longitudinal micromatic setting 7 and base supports frame transverse fine-adjusting device 14, finely tune, eliminate the rigging error producing in assembling process, and for the test specimen of different-thickness, also can in the situation that not changing other Plant arrangements, by adjusting base bracing frame transverse fine-adjusting device 14, reach testing requirements and test.
Using method of the present invention is as follows:
According to above embodiment, first base supports frame is fixed, then laterally fatigue loading force application apparatus and the corresponding utility appliance thereof of (along specimen thickness direction), longitudinal (along test specimen length direction) and circumferential (along specimen width direction) three directions are installed respectively, after whole fatigue experimental device fine setting has been located, test specimen is installed and the centering location of three directions of test specimen is regulated, adjust the application of force actuator of three directions, make to contact with test specimen, check after errorless and carry out three-dimensional prestrain, as all rightly in prestrain can carry out three-dimensional loading fatigue test.
Claims (4)
1. the fatigue experimental device simultaneously loading for structure test specimen three-dimensional load, comprise base supports frame (1), in order to be fixedly connected with ground, characterized by further comprising a set of horizontal force application apparatus and horizontal clamping device, a set of longitudinal force application apparatus and longitudinal micromatic setting (7), a set of circumferential force application apparatus and upper and lower two cover horizontal rolling combination units (9), three direction force application apparatus all complete applying specimen test power by conventional unidirectional tired actuator;
Described horizontal force application apparatus comprises horizontal application of force actuator (2) and horizontal application of force connector (4), laterally application of force connector (4) one end is connected with horizontal application of force actuator (2), the other end is for directly contacting with test specimen, the one end wherein contacting with test specimen is circular-arc, take that to reach the transverse test power that test specimen is applied be linear load, laterally clamping device includes two pairs of laterally clamping bearings (3), laterally clamping bearing (3) is fixed on the horizontal specific clamping plate (15) of base supports frame (1), horizontal specific clamping plate (15) are welded in respectively on the T-shaped face plate on base supports frame and are formed by two groups of steel plates that have up and down a U-shaped groove, two pairs laterally clamp bearing and successively penetrate from U-shaped groove, and fix with the bolt at bearing two ends, described two couple laterally clamping bearing clamps test specimen in transverse test line of force symmetria bilateralis position, transversal displacement with restriction test specimen bite position, the test force that laterally application of force connector (4) applies test specimen mid point and laterally clamping bearing (3) form the three-point bending of test specimen at the limiting displacement at test specimen two ends,
Described longitudinal force application apparatus includes longitudinal application of force actuator (5) and two longitudinal application of force connectors (6), one end of one of them longitudinal application of force connector (6) is connected with longitudinal application of force actuator (5), the other end and test specimen one end in contact, another longitudinal application of force connector (6) one end is connected with longitudinal micromatic setting (7), the other end contacts with the test specimen other end, wherein longitudinal both ends of test specimen are cylindrical arcuation, longitudinally application of force connector (6) is interior circular-arc with the surface of contact of test specimen, take and guarantee that longitudinal application of force connector (6) and test specimen contact as line, when longitudinally application of force actuator (5) applies test force to test specimen, longitudinally the ground surface end that is fixed on of micromatic setting (7) produces support reaction, to complete, longitudinal two ends of test specimen are applied to the longitudinally test pressure of center line,
Described circumferential force application apparatus includes circumferential application of force actuator (8), described horizontal rolling combination unit, it includes tourelle pedestal (10), tourelle contiguous block (11), tourelle clamping plate (12) and tourelle roller bearing (13), wherein the upper surface of the tourelle pedestal (10) of the horizontal rolling combination unit of top is connected with circumferential application of force actuator (8), the lower surface of the tourelle pedestal (10) of the horizontal rolling combination unit of below is connected with base supports frame (1) upper surface, tourelle contiguous block (11) is for directly contacting with test specimen, tourelle roller bearing (13) is fixed between tourelle pedestal (10) and tourelle contiguous block (11), to roll within the specific limits, tourelle clamping plate (12) are for fixedly tourelle contiguous block (11) and tourelle pedestal (10).
2. by the fatigue experimental device loading for structure test specimen three-dimensional load claimed in claim 1 simultaneously, it is characterized in that described base supports frame also includes base supports frame transverse fine-adjusting device (14), it is comprised of a trapezoid block and two wedges, the cooperation of two wedges by trapezoid block and trapezoid block both sides is adjusted base supports frame along horizontal position, to reach longitudinal force application apparatus and circumferentially force application apparatus and the horizontal centering of test specimen.
3. by the fatigue experimental device loading for structure test specimen three-dimensional load described in claim 1 or 2 simultaneously, it is characterized in that described longitudinal micromatic setting (7) includes inner splint (16), external splint (17), fixedly trapezoid block (18) and movably trapezoid block (19), inner splint (16) is connected with longitudinal application of force connector (6), inside and outside clamping plate by bolt, connect and inside and outside clamping plate between there is a fixed gap, fixedly trapezoid block (18) and movable trapezoid block (19) are between inside and outside clamping plate, by promoting, movable trapezoid block (19) is adjusted inner splint (16) and the position of longitudinal application of force connector (6) of being attached thereto, to complete the longitudinal centering adjustment of test specimen.
4. by the fatigue experimental device loading for structure test specimen three-dimensional load claimed in claim 3 simultaneously, it is characterized in that described horizontal force application apparatus and longitudinal force application apparatus are all arranged horizontally, and the longitudinal centre line of its center line and test specimen is on same surface level, laterally the center line of force application apparatus is vertical with test specimen longitudinal centre line, longitudinally the center line of force application apparatus and test specimen longitudinal centre line are on same straight line, and laterally force application apparatus is orthogonal with the center line of longitudinal force application apparatus; Described circumferential force application apparatus is vertically arranged above test specimen, circumferentially the center line of force application apparatus is perpendicular to test specimen longitudinal centre line, and intersect at test specimen longitudinal centre line mid point, laterally force application apparatus, longitudinal force application apparatus and circumferential force application apparatus are mutually vertically arranged between two.
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| CN201210052798.5A CN102607834B (en) | 2012-03-02 | 2012-03-02 | Fatigue testing device capable of synchronously loading loads in three directions for structural test piece |
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| CN102902850B (en) * | 2012-09-19 | 2015-03-04 | 西安交通大学 | Method for determining stabilities of water feeding pump turbines supported by flexible plates |
| CN104089768A (en) * | 2014-07-25 | 2014-10-08 | 北车风电有限公司 | Hub testing device for wind generating set |
| CN110441138A (en) * | 2019-07-09 | 2019-11-12 | 武汉理工大学 | Adjustable Biaxial stress fatigue rig |
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| JP2001289762A (en) * | 2000-04-05 | 2001-10-19 | Mitsubishi Heavy Ind Ltd | Wheel load fatigue testing machine |
| KR100819832B1 (en) * | 2006-10-11 | 2008-04-07 | 경북대학교 산학협력단 | Tribo-fatigue measuring apparatus for structural ceramics and method at the same |
| CN201177557Y (en) * | 2008-04-08 | 2009-01-07 | 株洲时代新材料科技股份有限公司 | Flexible locater triaxial loading fatigue test tool equipment |
| CN100578183C (en) * | 2008-09-17 | 2010-01-06 | 西南交通大学 | Testing table for fatigue strength of locomotive bogie |
| CN101776528B (en) * | 2010-03-11 | 2012-09-19 | 齐齐哈尔轨道交通装备有限责任公司 | Longitudinal fatigue loading device |
| CN101788392B (en) * | 2010-03-11 | 2012-03-28 | 齐齐哈尔轨道交通装备有限责任公司 | Fatigue and vibration experiment table and system |
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