CN113848139A - A cyclic loading fatigue test device for pipeline moment of flexure - Google Patents
A cyclic loading fatigue test device for pipeline moment of flexure Download PDFInfo
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- CN113848139A CN113848139A CN202111108548.4A CN202111108548A CN113848139A CN 113848139 A CN113848139 A CN 113848139A CN 202111108548 A CN202111108548 A CN 202111108548A CN 113848139 A CN113848139 A CN 113848139A
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- 125000004122 cyclic group Chemical group 0.000 title claims abstract description 23
- 238000009661 fatigue test Methods 0.000 title claims abstract description 17
- 238000005452 bending Methods 0.000 claims abstract description 42
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- 238000012546 transfer Methods 0.000 claims abstract description 12
- 230000007246 mechanism Effects 0.000 claims abstract description 6
- 239000007788 liquid Substances 0.000 claims abstract description 4
- 230000005540 biological transmission Effects 0.000 claims description 24
- 238000002474 experimental method Methods 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims 1
- 238000013001 point bending Methods 0.000 abstract description 6
- 230000007547 defect Effects 0.000 abstract description 2
- 238000013461 design Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009313 farming Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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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
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
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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
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
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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
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0073—Fatigue
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Life Sciences & Earth Sciences (AREA)
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- General Physics & Mathematics (AREA)
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The embodiment of the invention discloses a cyclic loading fatigue test device for pipeline bending moment, which comprises a pipeline end fixing structure, a bending moment loading structure and a water pressure loading structure, wherein the pipeline end fixing structure is provided with a bending moment loading hole; the pipeline end fixing structure comprises a transfer cavity, a universal ball and a connecting structure, and the transfer cavity, the universal ball and the connecting structure are matched to form a through liquid channel; the hydraulic loading structure comprises a high-pressure water supply mechanism and a high-pressure water pipe; the bending moment loading structure comprises a reaction frame, a rotary ball and a driving piece, one side of the rotary ball, facing the pipeline end fixing structure, is connected with a connecting rod assembly, and an included angle is formed between a connecting line between connecting points on the universal ball and the rotary ball and the axis of the connecting rod assembly. According to the invention, one end of the pipeline is rotatably fixed through the fixing structure at the end part of the pipeline, and then the circular loading of high-frequency pure bending moment is realized based on the arrangement of the bending moment loading structure at the other end, and meanwhile, the whole bending moment recording can be realized, so that the defects of the conventional four-point bending loading device are avoided.
Description
Technical Field
The embodiment of the invention relates to the technical field of pipeline bending moment loading devices, in particular to a cyclic loading fatigue experiment device for pipeline bending moment.
Background
With the development of marine resources, not only the traditional industries such as deep sea farming industry and the like have attracted more attention, but also deep sea mining and deep sea oil fields have been researched by countries all over the world. Marine risers are widely used in marine engineering as a reliable and inexpensive means of transportation. The riser is usually connected between the offshore drilling platform and the submarine pipeline, the offshore drilling platform is influenced by sea environments such as waves, wind loads, internal waves and the like, reciprocating motion can occur on the sea surface, and meanwhile, due to the design requirements and the influence of an anchor chain, the tension of the platform on the riser is usually in a safe range. However, with the lapse of time, the internal micro-structural cracks of the pipeline can be developed into large cracks under the action of long-time cyclic load, and further the pipeline is locally damaged and broken, and even the pipeline can be seriously cracked. It is important to the design safety of the pipeline to study fatigue failure of the pipeline.
When the marine riser contacts the seabed, the pipeline is subjected to a large bending moment load. In the process of offshore platform operation, the repeated platform movement drives the pipeline to float up and down, so that the submarine pipeline is subjected to larger cyclic bending moment load. The existing bending moment fatigue devices are mostly four-point bending loading devices, the stress concentration of the bending position is large, and main influence factors cannot be effectively judged. Meanwhile, the existing loading device is mostly loaded by using a hydraulic oil cylinder, the loading stroke of the bending moment is limited, the frequency cannot be increased due to overheating of the oil cylinder, and the test time is long.
Disclosure of Invention
Therefore, the embodiment of the invention provides a cyclic loading fatigue test device for pipeline bending moment, wherein one end of the pipeline is rotatably fixed through a pipeline end fixing structure, and cyclic loading of high-frequency pure bending moment is realized based on the arrangement of a bending moment loading structure at the other end, and meanwhile, integral bending moment recording can be realized, so that the defects of a conventional four-point bending loading device are avoided.
In order to achieve the above object, an embodiment of the present invention provides the following:
in one aspect of the embodiment of the invention, a cyclic loading fatigue test device for pipeline bending moment is provided, which comprises a pipeline end fixing structure arranged at one end, a bending moment loading structure arranged at the other end, and a water pressure loading structure communicated with the pipeline end fixing structure, wherein a placing gap for placing a pipeline to be tested is formed between the pipeline end fixing structure and the bending moment loading structure; wherein the content of the first and second substances,
the pipeline end fixing structure comprises a transfer cavity, a universal ball and a connecting structure, wherein a cavity is formed in the transfer cavity, the transfer cavity is provided with an opening, the universal ball is rotatably and hermetically arranged, the connecting structure extends outwards from the universal ball and is used for connecting a pipeline to be tested, and the transfer cavity, the universal ball and the connecting structure are matched to form a through liquid channel;
the hydraulic loading structure comprises a high-pressure water supply mechanism and a high-pressure water pipe which is communicated with the high-pressure water supply mechanism and the transfer cavity;
moment of flexure loading structure is including being formed with the reaction frame in ball groove, rotationally set up in roating sphere in the ball groove, connect in just be used for driving on the roating sphere is in pivoted driving piece in the ball groove, just in the roating sphere towards one side of pipeline tip fixed knot structure is connected with the connecting rod subassembly, universal ball with line between the tie point on the roating sphere with be formed with the contained angle between the axis of connecting rod subassembly.
As a preferable scheme of the present invention, the connection structure includes a connection pipe extending outward from the universal ball, and a first mounting flange disposed at one end of the connection pipe away from the universal ball; and the number of the first and second electrodes,
the center of the first mounting flange is formed to penetrate therethrough.
As a preferable aspect of the present invention, the pipe end fixing structure further includes a mounting bracket, and the transfer chamber is disposed on the mounting bracket.
As a preferred embodiment of the invention, the mounting bracket is adjustably arranged in height.
As a preferable scheme of the present invention, the driving member includes a support frame, a servo motor disposed on the support frame, a brake gear connected to an output end of the servo motor, a transmission gear engaged with the brake gear and rotatably disposed, and a dowel bar eccentrically disposed on the transmission gear, and one end of the dowel bar, which is far away from the transmission gear, is connected to the rotating ball.
As a preferred aspect of the present invention, the connecting rod assembly includes a force guide rod connected to the rotating ball, and a second mounting flange connected to one end of the force guide rod away from the rotating ball.
In a preferred embodiment of the present invention, the dowel bar is parallel to the axis of the dowel bar or is located on the same straight line.
In a preferred embodiment of the present invention, the ball groove has the same axis as the rotary ball, a limit projection is formed in the ball groove, and a limit groove fitted with the limit projection is formed in the rotary ball so that the axis of the rotary ball does not coincide with the axis of the ball groove.
As a preferable scheme of the present invention, the hydraulic loading structure further includes a pressure pump, and the pressure pump is configured to keep the pressure in the pipe to be measured constant.
In a preferred embodiment of the present invention, the brake gear and the transmission gear are engaged with each other through a transmission assembly.
The embodiment of the invention has the following advantages:
according to the embodiment of the invention, the high-frequency circulating bending moment of the pipeline to be tested is loaded by matching the pipeline end fixing structure with the bending moment loading structure; the synchronous loading of the internal pressure and the bending moment is realized by the cooperation of a water pressure loading structure, and the simulation truth of the whole cyclic loading is improved; meanwhile, the invention avoids the traditional four-point bending loading mode through the synchronous matching of the rotating ball and the driving piece, overcomes the influence of stress concentration caused by the traditional four-point bending loading mode on the fatigue life of the pipeline, and realizes the pure bending moment loading.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the effects and the achievable by the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover.
Fig. 1 is a schematic structural diagram of a cyclic loading fatigue testing apparatus provided in an embodiment of the present invention;
fig. 2 is a schematic partial structural diagram of a cyclic loading fatigue testing apparatus according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a driving element according to an embodiment of the present invention.
In the figure:
1-a pipeline end fixing structure; 2-a hydraulic loading structure; 3-a pipeline to be tested; 4-bending moment loading structure;
11-a transfer chamber; 12-a universal ball; 13-a connecting tube; 14-a first mounting flange; 15-mounting a bracket;
21-high pressure water pipe;
41-reaction frame; 42-a rolling ball; 43-a drive member; 44-force guide rods; 45-a second mounting flange;
431-a support frame; 432-a servo motor; 433-a brake gear; 434-drive gear; 435-limit hole; 436-dowel bars.
Detailed Description
The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The following is further illustrated by specific examples.
As shown in fig. 1, the present invention provides a cyclic loading fatigue testing apparatus for pipeline bending moment, which includes a pipeline end fixing structure 1 disposed at one end, a bending moment loading structure 4 disposed at the other end, and a water pressure loading structure 2 communicated with the pipeline end fixing structure 1, wherein a placement gap for placing a pipeline 3 to be tested is formed between the pipeline end fixing structure 1 and the bending moment loading structure 4. Wherein, the both ends of pipeline 3 that awaits measuring are welded respectively has flange to through flange respectively with both ends and first mounting flange 14 and second mounting flange 45 detachably connected, during water pressure loading structure 2 carries the high pressure water in the high pressure water supply mechanism to pipeline 3 that awaits measuring through water pipe 21 wherein under high pressure, treat to input the completion back, can exert circulation moment of bending to pipeline 3 that awaits measuring through starting moment loading structure 4. In addition, the bending moment loading structure 4 is adopted to convert the force in the rotation direction into the surrounding force to load the bending moment, so that the problems of limited bending moment stroke and the like caused by the conventional hydraulic telescopic mode for loading the bending moment are greatly solved.
As shown in fig. 2, the pipeline end fixing structure 1 includes a transmission cavity 11, a rotatable and airtight universal ball 12 and a connection structure, wherein the transmission cavity 11 is formed inside the transmission cavity and has an opening, the universal ball 12 is arranged at the opening, the connection structure is arranged by extending the universal ball 12 outwards and is used for connecting the pipeline 3 to be tested, and the transmission cavity 11, the universal ball 12 and the connection structure are matched to form a through liquid channel. In the actual working process, the water pressure loading structure 2 inputs high-pressure water into the transfer cavity 11 through the high-pressure water pipe 21, then the high-pressure water flows to the universal ball 12, and finally the high-pressure water flows into the pipeline 3 to be measured. A cavity has in the first mounting flange 14 center for connecting pipeline 3 that awaits measuring, can let water flow into pipeline 3 that awaits measuring through first mounting flange 14 to exert pressure from inside to outside to pipeline 3 that awaits measuring. The force guide rod 44 and the force transmission rod 436 of the driving member 43 are completely fixedly connected with the rotary ball 42 of the reaction frame 41, and the rotary ball 42 is formed with a screw thread engaged with the inner surface of the reaction frame 41, so that the rotation of the rotary ball 42 in the axial direction of the ball groove of the reaction frame 41 (where both ends of the ball groove are formed as openings, and thus, where the axial direction is the axis formed from one end of the opening to the other end) is restricted, but the rotation of the rotary ball 42 in the other direction is not restricted. Through the design, the axial rotation of the pipeline 3 to be tested is effectively limited, so that the bending moment direction of the pipeline 3 to be tested can be changed all the time under the driving action of the driving piece 43, and the purpose of circulating the bending moment is achieved. Meanwhile, the arrangement mode is based on the matched rotation of the two ends, so that the adjustment of the local bending moment of conventional four-point bending is avoided, and the problems of uneven stress of the pipeline to be measured 3 and the like caused by stress concentration are avoided.
As shown in fig. 3, the driving member 43 on the bending moment loading structure 4 includes a supporting frame 431 (which may be specifically selected as a reaction frame structure), a servo motor 432 disposed on the supporting frame 431, a brake gear 433 connected to an output end of the servo motor 432, a transmission gear 434 engaged with the brake gear 433 and rotatably disposed, and a dowel 436 eccentrically disposed on the transmission gear 434, and one end of the dowel 436, which is far away from the transmission gear 434, is connected to the rotating ball 42. Of course, here, the limit hole 435 may be eccentrically disposed on the driving gear 434, and the transmission rod 436 passes through the limit hole 435 and is not connected to the limit hole, so that it can rotate in the limit hole 435. Under the working state, the servo motor 432 drives the brake gear 433 to rotate, the brake gear 433 drives the transmission gear 434 to rotate, and meanwhile, the force transmission rod 436 rotates around the axis, and further drives the rotary ball 42 to rotate in the ball groove, so that the rotating direction of the force guide rod 44 is effectively realized, and the loading of the circulating bending moment is provided for the pipeline 3 to be tested.
Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (10)
1. The cyclic loading fatigue experiment device for the pipeline bending moment is characterized by comprising a pipeline end fixing structure (1) arranged at one end of the pipeline end fixing structure, a bending moment loading structure (4) arranged at the other end of the pipeline end fixing structure and a water pressure loading structure (2) communicated with the pipeline end fixing structure (1), wherein a placing gap for placing a pipeline (3) to be tested is formed between the pipeline end fixing structure (1) and the bending moment loading structure (4); wherein the content of the first and second substances,
the pipeline end fixing structure (1) comprises a transmission cavity (11) which is internally provided with a cavity and is provided with an opening, a universal ball (12) which can rotate and is arranged in a sealing mode and is used for connecting a pipeline (3) to be tested, and a connecting structure which extends outwards from the universal ball (12), wherein the transmission cavity (11), the universal ball (12) and the connecting structure are matched to form a through liquid channel;
the hydraulic loading structure (2) comprises a high-pressure water supply mechanism and a high-pressure water pipe (21) which is communicated with the high-pressure water supply mechanism and the transfer cavity (11);
moment of flexure load structure (4) including reaction frame (41) that is formed with the ball groove, rotationally set up in roating ball (42) in the ball groove, connect in on roating ball (42) and be used for driving roating ball (42) are in pivoted driving piece (43) in the ball groove, just in roating ball (42) the orientation one side of pipeline tip fixed knot structure (1) is connected with the connecting rod subassembly, universal ball (12) with line between the tie point on roating ball (42) with be formed with the contained angle between the axis of connecting rod subassembly.
2. A cyclic loading fatigue testing device according to claim 1, wherein the connecting structure comprises a connecting tube (13) extending outwards from the universal ball (12), and a first mounting flange (14) arranged at one end of the connecting tube (13) far from the universal ball (12); and the number of the first and second electrodes,
the center of the first mounting flange (14) is formed to penetrate.
3. A cyclic loading fatigue test device according to claim 2, wherein the pipe end fixing structure (1) further comprises a mounting bracket (15), the transfer chamber (11) being arranged on the mounting bracket (15).
4. A cyclic loading fatigue testing device according to claim 3, wherein the mounting bracket (15) is height adjustable.
5. A cyclic loading fatigue test device according to any of claims 1-4, wherein the driving member (43) comprises a supporting frame (431), a servo motor (432) arranged on the supporting frame (431), a braking gear (433) connected to the output end of the servo motor (432), a transmission gear (434) meshed with the braking gear (433) and rotatably arranged, and a transmission rod (436) eccentrically arranged on the transmission gear (434), and one end of the transmission rod (436) far away from the transmission gear (434) is connected to the rotating ball (42).
6. A cyclic loading fatigue testing device according to claim 5, wherein the connecting rod assembly comprises a force guide rod (44) connected to the rotating ball (42), and a second mounting flange (45) connected to one end of the force guide rod (44) far away from the rotating ball (42).
7. A cyclic loading fatigue test device according to claim 6, wherein the dowel (436) is parallel to or on the same line as the axis of the force guide rod (44).
8. A cyclic loading fatigue test device according to claim 7, wherein the ball groove has the same axis as the rotary ball (42), a limit protrusion is formed in the ball groove, and a limit groove engaged with the limit protrusion is formed on the rotary ball (42) so that the rotation axis of the rotary ball (42) does not coincide with the axis of the ball groove.
9. A cyclic loading fatigue test device according to claim 1, wherein the hydraulic loading structure (2) further comprises a pressure pump, and the pressure pump is used for keeping the pressure in the pipeline (3) to be tested constant.
10. A cyclic loading fatigue test device according to claim 5, wherein the brake gear (433) and the transmission gear (434) are engaged with each other through a speed change assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111108548.4A CN113848139B (en) | 2021-09-22 | 2021-09-22 | Circulating loading fatigue experiment device for pipeline bending moment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111108548.4A CN113848139B (en) | 2021-09-22 | 2021-09-22 | Circulating loading fatigue experiment device for pipeline bending moment |
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| CN113848139A true CN113848139A (en) | 2021-12-28 |
| CN113848139B CN113848139B (en) | 2024-05-03 |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB530418A (en) * | 1939-06-23 | 1940-12-11 | Carl Schenck Eisengiesserei Un | Improvements in fatigue testing machines |
| GB748787A (en) * | 1953-07-14 | 1956-05-09 | Nat Res Dev | Improvements in and relating to fatigue testing machines |
| FR2552547A1 (en) * | 1983-09-22 | 1985-03-29 | Seram | Machine for alternating flexion or torsion tests with a constant amplitude of the force or with constant amplitude of deformation |
| JPH06235689A (en) * | 1993-02-09 | 1994-08-23 | Nippon Telegr & Teleph Corp <Ntt> | Fatigue test method |
| JP2009250679A (en) * | 2008-04-02 | 2009-10-29 | Shimadzu Corp | Machine for rotation-bending test |
| WO2012015167A2 (en) * | 2010-07-30 | 2012-02-02 | Lee Chong Soo | Apparatus having circulation type coolant sprayer attached for conducting low temperature pyro tests and method for same |
| CN106950116A (en) * | 2017-03-02 | 2017-07-14 | 天津大学 | Coupling between bending and extension corrosion fatigue testing machine |
| CN112161882A (en) * | 2020-08-25 | 2021-01-01 | 浙江盛洋科技股份有限公司 | Accelerated anti-fatigue cable testing process |
| CN112268808A (en) * | 2020-10-21 | 2021-01-26 | 天津大学 | Test method for combined action of bending moment and internal pressure of submarine pipeline |
| CN113237782A (en) * | 2021-04-22 | 2021-08-10 | 天津大学 | Full-size riser fatigue test device |
-
2021
- 2021-09-22 CN CN202111108548.4A patent/CN113848139B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB530418A (en) * | 1939-06-23 | 1940-12-11 | Carl Schenck Eisengiesserei Un | Improvements in fatigue testing machines |
| GB748787A (en) * | 1953-07-14 | 1956-05-09 | Nat Res Dev | Improvements in and relating to fatigue testing machines |
| FR2552547A1 (en) * | 1983-09-22 | 1985-03-29 | Seram | Machine for alternating flexion or torsion tests with a constant amplitude of the force or with constant amplitude of deformation |
| JPH06235689A (en) * | 1993-02-09 | 1994-08-23 | Nippon Telegr & Teleph Corp <Ntt> | Fatigue test method |
| JP2009250679A (en) * | 2008-04-02 | 2009-10-29 | Shimadzu Corp | Machine for rotation-bending test |
| WO2012015167A2 (en) * | 2010-07-30 | 2012-02-02 | Lee Chong Soo | Apparatus having circulation type coolant sprayer attached for conducting low temperature pyro tests and method for same |
| CN106950116A (en) * | 2017-03-02 | 2017-07-14 | 天津大学 | Coupling between bending and extension corrosion fatigue testing machine |
| CN112161882A (en) * | 2020-08-25 | 2021-01-01 | 浙江盛洋科技股份有限公司 | Accelerated anti-fatigue cable testing process |
| CN112268808A (en) * | 2020-10-21 | 2021-01-26 | 天津大学 | Test method for combined action of bending moment and internal pressure of submarine pipeline |
| CN113237782A (en) * | 2021-04-22 | 2021-08-10 | 天津大学 | Full-size riser fatigue test device |
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| Title |
|---|
| THEODORO A. NETTO: "Fatigue Performance of Reeled Risers", 《23RD INTERNATIONAL CONFERENCE ON OFFSHORE MECHANICS AND ARCTIC ENGINEERING》, pages 1 - 12 * |
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| CN113848139B (en) | 2024-05-03 |
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