CN107314932B - Modularized fatigue test field, matched device and fatigue test method - Google Patents
Modularized fatigue test field, matched device and fatigue test method Download PDFInfo
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- CN107314932B CN107314932B CN201710456943.9A CN201710456943A CN107314932B CN 107314932 B CN107314932 B CN 107314932B CN 201710456943 A CN201710456943 A CN 201710456943A CN 107314932 B CN107314932 B CN 107314932B
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- 238000009661 fatigue test Methods 0.000 title claims abstract description 73
- 238000000034 method Methods 0.000 title claims abstract description 14
- 230000035939 shock Effects 0.000 claims abstract description 16
- 238000010521 absorption reaction Methods 0.000 claims abstract description 9
- 238000002955 isolation Methods 0.000 claims abstract description 8
- 238000009413 insulation Methods 0.000 claims abstract description 4
- 238000012360 testing method Methods 0.000 claims description 99
- 230000002457 bidirectional effect Effects 0.000 claims description 33
- 238000013016 damping Methods 0.000 claims description 18
- 238000005452 bending Methods 0.000 claims description 13
- 230000008569 process Effects 0.000 abstract description 7
- 238000011160 research Methods 0.000 description 6
- 206010016256 fatigue Diseases 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
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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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/005—Electromagnetic means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0073—Fatigue
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/0202—Control of the test
- G01N2203/0208—Specific programs of loading, e.g. incremental loading or pre-loading
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/04—Chucks, fixtures, jaws, holders or anvils
- G01N2203/0441—Chucks, fixtures, jaws, holders or anvils with dampers or shock absorbing means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/04—Chucks, fixtures, jaws, holders or anvils
- G01N2203/0464—Chucks, fixtures, jaws, holders or anvils with provisions for testing more than one specimen at the time
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a modularized fatigue test site, a matched device and a fatigue test method, wherein the modularized fatigue test site and the matched device comprise a base, a bottom plate, a plurality of shock absorption and isolation modules and a plurality of accessory module units; the base plate is arranged above the base through a detachable connecting piece, and a plurality of shock absorption and insulation modules are arranged between the lower surface of the base plate and the base; the upper surface of the bottom plate is provided with a plurality of accessory module units, the positions of the accessory module units on the bottom plate are adjustable, and the accessory module units are provided with fixing parts for installing workpieces. According to the invention, the shock absorption and insulation module is arranged between the bottom plate and the base, so that the integral vibration in the fatigue test process can be effectively reduced, and the influence on the outside is reduced.
Description
Technical Field
The invention belongs to the field of fatigue tests, and particularly relates to a modularized fatigue test method, a field and a matched device thereof.
Background
Fatigue of structures and materials is currently one of the most common phenomena in many fields, especially in the engineering field. Because the existing numerical simulation technology is difficult to effectively reflect the specific process of fatigue damage and the randomness in the fatigue damage process, the research of fatigue is still mostly based on fatigue tests. The conventional fatigue test equipment mostly adopts a hydraulic servo test device, but because the frequency of hydraulic servo loading is lower, the fatigue test period is longer, and the large-batch development of fatigue test research is restricted. In recent years, a mechanical fatigue testing machine based on a vibration motor is developed abroad, the current situations of long fatigue test research period and high cost are improved to a certain extent, the number of fatigue test researches is quickened, and the research quality is improved. However, due to the fact that the earlier-stage related researches on the mechanical fatigue testing machine are less, the fatigue testing machine has large vibration influence and low equipment applicability in actual use, and is difficult to meet the requirement of a large-scale fatigue test, and meanwhile, the novel mechanical fatigue testing machine is lack of corresponding fields and management technology to adapt to the test work requirement of the novel mechanical fatigue testing machine. Therefore, in order to reduce the influence of the test process of the fatigue testing machine on external vibration and adapt to the loading requirements of different test piece sizes, a corresponding fatigue testing site and matched equipment thereof are required to be provided, so that the self characteristics of the mechanical fatigue testing machine are fully exerted, the testing efficiency and safety are improved, and the rationalization and diversification of the fatigue test are realized.
Disclosure of Invention
The invention aims to: the invention provides a modularized fatigue test field and a matched device aiming at the existing fatigue test.
The technical scheme is as follows: in order to solve the technical problems, the modularized fatigue test field and the matched device adopt the following technical scheme:
a modularized fatigue test site and a matched device comprise a base, a bottom plate, a plurality of shock absorption and isolation modules and a plurality of accessory module units; the base plate is arranged above the base through a detachable connecting piece, and a plurality of shock absorption and insulation modules are arranged between the lower surface of the base plate and the base; the upper surface of the bottom plate is provided with a plurality of accessory module units, the positions of the accessory module units on the bottom plate are adjustable, and the accessory module units are provided with fixing parts for installing workpieces.
Preferably, the shock absorption and isolation module is a cylindrical shock absorption rubber block; the base is provided with a plurality of damping rubber lower fixing ends for installing damping isolation modules, and the lower surface of the bottom plate is provided with damping rubber upper fixing ends at the corresponding positions of the damping rubber lower fixing ends; the upper and lower ends of the damping rubber block are respectively and correspondingly arranged between the lower plate surface of the bottom plate and the base through the fixation of the upper fixed end of the damping rubber body and the lower fixed end of the damping rubber body.
Preferably, the floor includes more than one floor module unit; the base comprises more than one base module unit; the base module units are arranged in one-to-one correspondence with the base module units; and when the bottom plate module unit comprises more than two, two adjacent bottom plate module units are assembled through the bottom plate connecting structure.
Preferably, the bottom plate connecting structure comprises a bottom plate connecting plate, and two ends of the bottom plate are correspondingly connected and fixed with two adjacent bottom plate module units through two-way threaded rod assemblies; the bidirectional threaded rod assembly comprises a bidirectional threaded rod, a first locking nut and a second locking nut, and the rotation directions of the first locking nut and the second locking nut are opposite; the bidirectional threaded rod is a stepped threaded rod and comprises a lower part of the bidirectional threaded rod which can be in threaded fit with the first locking nut and an upper part of the bidirectional threaded rod which can be in threaded fit with the second locking nut, and the external thread diameter of the lower part of the bidirectional threaded rod is smaller than that of the upper part of the bidirectional threaded rod; the lower part of the bidirectional threaded rod is screwed and fixed with the first lock nut, the bottom plate connecting plate and the bottom plate module unit in sequence, a gasket is arranged between the first lock nut and the stepped surface of the bidirectional threaded rod, and the upper part of the bidirectional threaded rod is screwed and fixed with the second lock nut.
Preferably, a plurality of base plate-fitting bolt holes distributed in a rectangular array are arranged on the base plate module unit, and the distances between two adjacent base plate-fitting bolt holes are consistent.
Preferably, the bottom plate module unit is rectangular, and four corner positions of the bottom plate module unit are respectively provided with a bottom plate-base bolt hole; the base is provided with a base plate connecting rod at the corresponding position of each base plate-base seat bolt hole, and the base plate connecting rod passes through the base plate-base seat bolt hole and is locked by a base plate nut.
Preferably, the two types of accessory module units are respectively an accessory module unit I and an accessory module unit II; wherein: the accessory module unit I and the accessory module unit II are hollow block structures with square sections, the length of the side wall of the accessory module unit I is larger than that of the side wall of the accessory module unit II, four fixing holes a are arranged on each side wall of the accessory module unit I, six interval fixing holes b are respectively arranged on each side wall of the accessory module unit II, the inner diameters of the fixing holes a and the inner diameters of the fixing holes b are consistent, and the interval between every two adjacent fixing holes a and the interval between every two adjacent fixing holes b on the side wall of the accessory module unit I are consistent with the interval between every two adjacent bottom plate-accessory bolt holes on the bottom plate.
Preferably, the bottom plate is rectangular, and the four outer side edges of the bottom plate are all provided with tracks; one group of the four outer side edges is relatively parallel to the other side edges and is slidably provided with a portal frame, more than two multifunctional chucks are arranged on a cross beam of the portal frame, and the multifunctional chucks can suspend a test piece to be tested through ropes.
Another technical object of the present invention is to provide a fatigue testing method based on a modularized fatigue testing site and a matched device, comprising the following steps:
the first step: classifying the test pieces to be tested into small test pieces, segment bending test pieces and full-scale test pieces according to the different sizes and shapes of the test pieces to be tested;
and a second step of: preparing a base and a bottom plate with proper sizes for various test pieces, and determining the types, the numbers and the positions of accessory module units which are arranged on the bottom plate and are used for installing the test pieces to be tested;
wherein:
for a small test piece, the small test piece is arranged on the bottom plate through a cantilever of the accessory module unit;
for the segment test piece, two ends of the segment test piece are respectively arranged on the bottom plate through one accessory module unit, and the two accessory module units can be positioned on a straight line where the segment test piece is positioned;
for a segmental bending test piece, two ends of the segmental bending test piece are respectively arranged on the bottom plate through one accessory module unit, and the two accessory module units can be positioned on an arc where the segmental bending test piece is positioned;
for the full-scale test piece, a group of parallel side edges of the full-scale test piece are respectively and fixedly arranged on the bottom plate through a row of accessory module units;
and a third step of: determining proper base, base plate, and type, number and position of accessory module units arranged on the base plate for installing test equipment according to a fatigue test scheme;
fourth step: comprehensively considering the data determined in the second step and the third step, and finally determining the sizes of the base and the bottom plate and the connection relation among all the bottom plate module units forming the bottom plate;
fifth step: assembling the finally determined base, base plate and accessory module unit;
sixth step: fatigue testing was started.
The beneficial effects are that:
1. the vibration reduction and isolation module provided by the invention can effectively reduce the integral vibration in the fatigue test process and reduce the influence on the outside.
2. The invention provides an independent fatigue test site module, which independently works and jointly works each fatigue test site module through a base module unit, a bottom plate module unit, an accessory module, a bottom plate connecting plate and a bidirectional threaded rod, and solves the unreasonable situation of the design and planning of the existing fatigue test sites.
3. Through the diversified cooperation of connecting plate, satisfied fatigue test diversified demand.
Drawings
FIG. 1 is an exploded view of a fatigue testing module according to the present invention;
FIG. 2 is a perspective view of a fatigue testing module according to the present invention;
FIG. 3 is a perspective view of the accessory module unit of the present invention;
FIG. 4 is a schematic view of the assembly module unit and test piece combination of the present invention;
FIG. 5 is an exploded view of the floor connecting plate of the present invention;
FIG. 6 is a cross-sectional view of the base plate connection plate and bi-directional threaded rod of the present invention;
FIG. 7 is a modular fatigue test site segment test embodiment one of the present invention;
FIG. 8 is a modular fatigue test site segment trial embodiment II of the present invention;
FIG. 9 is a modular fatigue test site segment trial embodiment III of the present invention;
FIG. 10 is a modular fatigue test site full-scale test specimen test embodiment of the present invention;
FIG. 11 is a modular fatigue test site of the present invention in a different type of test piece testing embodiment;
FIG. 12 is an embodiment of a modular fatigue test site and laboratory crane kit of the present invention;
in fig. 1 and 2, 1, a base module unit; 11. a damping rubber lower fixed end; 12. a base plate connecting rod; 121. base-floor bolt holes; 122. a rubber ring; 123. a base plate bolt; 2. a floor module unit; 21. a damping rubber upper fixed end; 22. a bottom plate-bottom plate bolt hole; 23. a bottom plate-fitting bolt hole; 3b, an accessory module unit II; 31. fitting module unit bolt holes; 32. a rubber pad; 331. a small test piece; 4. a shock absorbing and isolating module;
in fig. 3 and 4, 3a, fitting module unit i;
in fig. 5 and 6, 24, annular rubber pad; 5. a bottom plate connecting plate; 6. a two-way threaded rod; 6a, the lower part of the bidirectional threaded rod; 6b, the upper part of the bidirectional threaded rod; 61. a clockwise nut; 62. a counterclockwise nut; 63. a gasket;
in fig. 7, 8 and 9, 332, segment test pieces; 7. a vibration motor; 8. an auxiliary loading device; 81. auxiliary cushion blocks;
in fig. 10, 11 and 12, 333, full-scale test pieces; 334. bending the test piece by the segment; 9. a door frame; 91. a track; 92. a multifunctional chuck; 93. a rope.
Detailed Description
The present invention is further illustrated in the accompanying drawings and detailed description which are to be understood as being merely illustrative of the invention and not limiting of its scope, and various modifications of the invention, which are equivalent to those skilled in the art upon reading the invention, will fall within the scope of the invention as defined in the appended claims.
Example 1
As shown in fig. 1 and 2, the modular fatigue test site and the associated apparatus include a base module unit 1, a floor module unit 2, and accessory module units 3a, 3b and a shock absorbing and insulating module unit 4. The base module unit 1 comprises a shock-absorbing rubber lower fixed end 11 and a bottom plate connecting rod 12, wherein the bottom plate connecting rod 12 comprises a base-bottom plate bolt hole 121, a rubber ring 122 and a bottom plate bolt 123. The floor module unit 2 includes a damping rubber upper fixed end 21, a floor-to-floor bolt hole 22, and a floor-to-fitting bolt hole 23. The fitting module units 3a, 3b include fitting module unit bolt holes 31, rubber pads 32. The shock absorbing and insulating module unit 4 is installed between the base module unit 1 and the floor module unit 2, and is connected with the base module unit 1 and the floor module unit 2 through the shock absorbing rubber lower fixing end 11 and the shock absorbing rubber upper fixing end 21.
Fig. 3 and 4 show two basic fitting module units 3a, 3b, namely a fitting module unit i 3a and a fitting module unit ii 3b. Wherein the fitting module unit can be self-designed and customized according to different test requirements under the condition of meeting the basic requirements of the base plate module unit 2. Rubber pads 32 are arranged between the accessory module units 3a and 3b and the different test pieces 331, 332, 333 and 334, and the functions of damping and reducing abrasion are achieved through high-strength bolt connection. The fitting module units 3a, 3b can be combined differently to change the loading height and realize the test loading requirements at different positions. Fig. 4 shows an exemplary embodiment of two of the fitting module units ii 3b for achieving the vertical loading requirement of the mini test piece 331 by stacking.
As shown in fig. 5 and 6, the base plate connecting plate 5 is a rectangular steel plate, and includes a bidirectional threaded rod 6, a clockwise nut 61, a counterclockwise nut 62 and a washer 63. An annular rubber pad 24 is provided between adjacent floor module units 2. When the base plate connecting plates 5 are not connected, vibration between the adjacent base plate module units 2 is independent from each other, that is, independent fatigue tests can be performed on each base plate module unit 2, so that vibration isolation is achieved, and mutual abrasion between the adjacent base plate module units 2 is reduced. When the adjacent bottom plate module units 2 are fixedly connected through the floor connecting plates 5 and the bidirectional threaded rods 6, the adjacent bottom plate module units 2 can form a whole, so that the deformation and vibration of the adjacent bottom plate module units 2 are kept consistent, the fatigue test of a segment or full-scale test piece is facilitated to be carried out, and the functional distinction of different fatigue test sites is realized. The bidirectional threaded rod 6 is a whole body, but the upper and lower sizes of the bidirectional threaded rod are inconsistent, the bidirectional threaded rod is divided into a lower part 6a of the bidirectional threaded rod and an upper part 6b of the bidirectional threaded rod, counterclockwise threads and clockwise threads are respectively arranged, and unidirectional locking is realized through a counterclockwise nut 62 and a clockwise nut 61. The connection of the fitting module units 3a, 3b to the floor module unit 2 is also made using the bidirectional threaded rod 6.
As shown in FIG. 7, a segment test piece according to the present invention is shown in a fatigue test example I. The adjacent bottom plate module units 2 are fixed in the width direction through the bottom plate connecting plates 5, and the bottom plate connecting plates 5 in other directions are disconnected, so that the single bottom plate module units 2 are expanded, and the common work is realized. This development may develop fatigue testing of the segment test piece 332.
As shown in FIG. 8, a segment test piece according to the present invention is shown in a fatigue test example II. By superposing the accessory module units II 3b, the test clear height of the segment test piece 332 can be increased, the requirements of observing and detecting fatigue cracks on the lower part of the top plate in the fatigue test process can be met, and other auxiliary equipment with higher height can be arranged.
As shown in FIG. 9, a segment test piece according to the present invention is shown in fatigue test example III. In order to meet the requirement of multi-point loading or equal-phase loading, on the basis of the arrangement of the first embodiment, loading modules can be separately arranged at two sides of the test site, and multi-point or equal-phase loading is realized through the mutual matching of the accessory module units 3a and 3b, the auxiliary loading device 8 and the auxiliary cushion 81. Each auxiliary loading device 8 is not connected to the floor module unit 2 in use, ensuring independence of loading points.
As shown in FIG. 10, a full-scale test piece of the present invention is an example of a fatigue test. By combining a plurality of base plate module units 2, in this embodiment, 6 base plate module units are adopted, so that the test requirements can be further expanded, and the loading requirements of the full-scale test piece 333 can be satisfied. Meanwhile, the adjacent sides of the 6 base plate module units 2 are connected through the base plate connecting plates 5, so that the common work of the 6 base plate module units 2 is realized, and the uncoordinated vibration in the test process is prevented.
As shown in FIG. 11, there are various test piece test examples of the present invention. The fatigue test site can be provided with a plurality of module sites according to the actual site size. By arranging the bottom plate connecting plate 5, a plurality of module sites can be spliced and disconnected, so that the loading of different types of test pieces 331, 332 and 334 under the same site can be realized without mutual interference.
As shown in fig. 12, an example of a test site of the present invention is tested in conjunction with a laboratory crane. According to laboratory conditions, the test site can be matched with a laboratory crane system. The rail 91 is arranged at the edge of the test field, the door frame 9 with a certain size can be arranged at the upper part of the rail 91, and the multifunctional clamping head 92 is arranged at the same time. Depending on the equipment installed on the multifunctional chuck 92, the full-length test piece 333 may be hoisted, transported, and placed. Thicker test pieces, such as full-scale test pieces with pavement, may be loaded when the hydraulic jack is installed on the multifunctional clamp 92.
The fatigue test method based on the modularized fatigue test field and the matched device comprises the following steps:
the first step: classifying the test pieces to be tested into small test pieces, segment bending test pieces and full-scale test pieces according to the different sizes and shapes of the test pieces to be tested;
and a second step of: preparing a base and a bottom plate with proper sizes for various test pieces, and determining the types, the numbers and the positions of accessory module units which are arranged on the bottom plate and are used for installing the test pieces to be tested;
wherein:
for a small test piece, the small test piece is arranged on the bottom plate through a cantilever of the accessory module unit;
for the segment test piece, two ends of the segment test piece are respectively arranged on the bottom plate through one accessory module unit, and the two accessory module units can be positioned on a straight line where the segment test piece is positioned;
for a segmental bending test piece, two ends of the segmental bending test piece are respectively arranged on the bottom plate through one accessory module unit, and the two accessory module units can be positioned on an arc where the segmental bending test piece is positioned;
for the full-scale test piece, a group of parallel side edges of the full-scale test piece are respectively and fixedly arranged on the bottom plate through a row of accessory module units;
and a third step of: determining proper base, base plate, and type, number and position of accessory module units arranged on the base plate for installing test equipment according to a fatigue test scheme;
fourth step: comprehensively considering the data determined in the second step and the third step, and finally determining the sizes of the base and the bottom plate and the connection relation among all the bottom plate module units forming the bottom plate;
fifth step: assembling the finally determined base, base plate and accessory module unit;
sixth step: fatigue testing was started.
Claims (8)
1. A modularized fatigue test site and a matched device are characterized by comprising a base, a vibrating motor, a bottom plate, a plurality of shock absorption and isolation modules and a plurality of accessory module units; the base plate is arranged above the base through a detachable connecting piece, and a plurality of shock absorption and insulation modules are arranged between the lower surface of the base plate and the base; the upper surface of the bottom plate is provided with a plurality of accessory module units, the positions of the accessory module units on the bottom plate are adjustable, and the accessory module units are provided with fixing parts for installing workpieces;
the base plate comprises more than one base plate module unit; the base comprises more than one base module unit; the base module units are arranged in one-to-one correspondence with the base module units; when the bottom plate module units comprise more than two bottom plate module units, the two adjacent bottom plate module units are assembled through the bottom plate connecting structure and/or are mutually independent;
the accessory module units are of two types, namely an accessory module unit I and an accessory module unit II;
the test piece to be tested is arranged on the bottom plate module unit through the accessory module unit II, and the test piece to be tested is fastened with the accessory module unit II and the bottom plate module unit through bidirectional threaded rods;
the vibrating motor is lapped on a test piece to be tested through one end of the auxiliary loading device, the other end of the auxiliary loading device is supported above the bottom plate module unit through the accessory module unit I, an auxiliary cushion block is arranged between the auxiliary loading device and the accessory module unit I, and each auxiliary loading device is not connected with the bottom plate module unit at the position, so that the independence of loading points is ensured.
2. The modular fatigue test site and associated device of claim 1, wherein the shock absorbing and isolating module is a cylindrical shock absorbing rubber block; the base is provided with a plurality of damping rubber lower fixing ends for installing damping isolation modules, and the lower surface of the bottom plate is provided with damping rubber upper fixing ends at the corresponding positions of the damping rubber lower fixing ends;
the upper and lower ends of the damping rubber block are respectively and correspondingly arranged between the lower plate surface of the bottom plate and the base through the fixation of the upper fixed end of the damping rubber body and the lower fixed end of the damping rubber body.
3. The modular fatigue test site and the matching device according to claim 2, wherein the bottom plate connecting structure comprises a bottom plate connecting plate, and two ends of the bottom plate are correspondingly connected and fixed with two adjacent bottom plate module units through a bidirectional threaded rod assembly; the bidirectional threaded rod assembly comprises a bidirectional threaded rod, a first locking nut and a second locking nut, and the rotation directions of the first locking nut and the second locking nut are opposite; the bidirectional threaded rod is a stepped threaded rod and comprises a lower part of the bidirectional threaded rod which can be in threaded fit with the first locking nut and an upper part of the bidirectional threaded rod which can be in threaded fit with the second locking nut, and the external thread diameter of the lower part of the bidirectional threaded rod is smaller than that of the upper part of the bidirectional threaded rod; the lower part of the bidirectional threaded rod is screwed and fixed with the first lock nut, the bottom plate connecting plate and the bottom plate module unit in sequence, a gasket is arranged between the first lock nut and the stepped surface of the bidirectional threaded rod, and the upper part of the bidirectional threaded rod is screwed and fixed with the second lock nut.
4. A modular fatigue testing site and associated apparatus according to claim 3, wherein the floor module units are provided with a plurality of floor-fitting bolt holes distributed in a rectangular array, the spacing between adjacent two floor-fitting bolt holes being uniform.
5. The modular fatigue testing site and associated equipment of claim 4, wherein the floor module unit is rectangular in shape and each of the four corner locations of the floor module unit is provided with a floor-base bolt hole; the base is provided with a base plate connecting rod at the corresponding position of each base plate-base seat bolt hole, and the base plate connecting rod passes through the base plate-base seat bolt hole and is locked by a base plate nut.
6. The modular fatigue test site and the matching device according to claim 4, wherein the fitting module unit I and the fitting module unit II are hollow block structures with square cross sections, the side wall length of the fitting module unit I is larger than that of the fitting module unit II, four fixing holes a are arranged on each side wall of the fitting module unit I, six interval fixing holes b are respectively arranged on each side wall of the fitting module unit II, the inner diameters of the fixing holes a and the fixing holes b are consistent, and the interval between two adjacent fixing holes a and the interval between two adjacent fixing holes b on the side wall of the fitting module unit I are consistent with the interval between two adjacent bottom plate-fitting bolt holes on the bottom plate.
7. The modular fatigue testing site and associated device of claim 1, wherein the base plate is rectangular in shape and four outer sides of the base plate are each provided with a track; one group of the four outer side edges is relatively parallel to the other side edges and is slidably provided with a portal frame, more than two multifunctional chucks are arranged on a cross beam of the portal frame, and the multifunctional chucks can suspend a test piece to be tested through ropes.
8. A fatigue testing method based on the modular fatigue testing site and the matched device as claimed in claim 1, comprising the steps of:
the first step: classifying the test pieces to be tested into small test pieces, segment bending test pieces and full-scale test pieces according to the different sizes and shapes of the test pieces to be tested;
and a second step of: preparing a base and a bottom plate with proper sizes for various test pieces, and determining the types, the numbers and the positions of accessory module units which are arranged on the bottom plate and are used for installing the test pieces to be tested; wherein:
for a small test piece, the small test piece is arranged on the bottom plate through a cantilever of the accessory module unit;
for the segment test piece, two ends of the segment test piece are respectively arranged on the bottom plate through one accessory module unit, and the two accessory module units can be positioned on a straight line where the segment test piece is positioned;
for a segmental bending test piece, two ends of the segmental bending test piece are respectively arranged on the bottom plate through one accessory module unit, and the two accessory module units can be positioned on an arc where the segmental bending test piece is positioned;
for the full-scale test piece, a group of parallel side edges of the full-scale test piece are respectively and fixedly arranged on the bottom plate through a row of accessory module units;
and a third step of: determining proper base, base plate, and type, number and position of accessory module units arranged on the base plate for installing test equipment according to a fatigue test scheme;
fourth step: comprehensively considering the data determined in the second step and the third step, and finally determining the sizes of the base and the bottom plate and the connection relation among all the bottom plate module units forming the bottom plate;
fifth step: assembling the finally determined base, base plate and accessory module unit;
sixth step: fatigue testing was started.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710456943.9A CN107314932B (en) | 2017-06-16 | 2017-06-16 | Modularized fatigue test field, matched device and fatigue test method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710456943.9A CN107314932B (en) | 2017-06-16 | 2017-06-16 | Modularized fatigue test field, matched device and fatigue test method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107314932A CN107314932A (en) | 2017-11-03 |
| CN107314932B true CN107314932B (en) | 2024-04-12 |
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