Full-scale riser hydrodynamic load test device

Abstract

The present invention provides a full-scale riser hydrodynamic load test device, comprising: a towing pool trailer, a top fixed structure module, an upper baffle module, a full-scale riser module and a lower baffle module; the top fixed structure module is fixedly mounted on the towing pool trailer, the upper baffle module is mounted on the top fixed structure module, one end of the full-scale riser module is fixedly mounted on the upper baffle module, and the lower baffle module is fixedly mounted on the other end of the full-scale riser module. The test device provided by the present invention can accurately measure the hydrodynamic load of a full-scale riser with an ultra-high Reynolds number, avoiding the shortcomings of the traditional cantilever test method sensor suffering from large bending moment test data distortion, sensor damage and the like.

Description

Technical Field

[0001] The present invention relates to the field of marine engineering technology, and in particular to a full-scale riser hydrodynamic load testing device. Background Art

[0002] The offshore riser is a typical slender rod structure. The hydrodynamic loads on this characteristic structure are mainly caused by the viscosity of the fluid. At present, the evaluation of this load mainly relies on model experimental measurement, and the hydrodynamic load coefficient is obtained by normalization based on the Morison equation. Then, in the design, the hydrodynamic load is evaluated and calculated based on the hydrodynamic load coefficient. Therefore, the offshore riser hydrodynamic load test is crucial to the design of the offshore riser structure and the determination of the verification load input.

[0003] So far, the industry and academia still do not have a complete understanding of the hydrodynamic loads of real-scale risers at ultra-high Reynolds numbers. After searching the existing technical literature, it was found that the current hydrodynamic load tests on risers are mostly limited to the low Reynolds number (Re~104) level, and the model is basically a scaled pipe model. In the 86th issue of Marine Structures in 2022, the paper "Vortex-induced forces of crossflow and inlineoscillating bluff bodies at moderate Reynolds numbers" (Study on vortex-induced forces of oscillating cylinders in the cross-flow and downstream directions under moderate Reynolds numbers) experimentally studied the hydrodynamic loads on cylinders. The experimental apparatus and experimental methods mentioned in the article use a single three-force sensor, one end of which is connected to the trailer, and the other end is directly fixed to the cylindrical tube model, the diameter of which is 3.81 cm and the length is 45.72 cm.

[0004] After analysis, the shortcomings of the experimental device and experimental method are as follows: (1) the sensor will be subjected to bending moment during the measurement process, which will greatly affect the experimental accuracy in the high Reynolds number real-scale riser experiment; (2) the stiffness requirements of the three-way force sensor are relatively high; (3) only low Reynolds number scaled riser hydrodynamic load experiments can be carried out. Summary of the invention

[0005] In view of the defects in the prior art, an object of the present invention is to provide a full-scale riser hydrodynamic load testing device.

[0006] A full-scale riser hydrodynamic load test device provided according to the present invention comprises: a towing pool trailer, a top fixed structure module, an upper baffle module, a full-scale riser module and a lower baffle module;

[0007] The top fixed structure module is fixedly mounted on the towing pool trailer, the upper baffle module is mounted on the top fixed structure module, one end of the full-scale riser module is fixedly mounted on the upper baffle module, and the lower baffle module is fixedly mounted on the other end of the full-scale riser module.

[0008] Preferably, the top fixed structure module includes a top fixed truss structure and an intermediate flange workpiece, one end of the top fixed truss is fixedly connected to the towing pool trailer, the other end of the top fixed truss is welded with a flange plate and fixedly connected to the intermediate flange workpiece through the flange plate, and the intermediate flange workpiece is fixedly connected to the full-scale riser module.

[0009] Preferably, the full-scale riser module comprises an outer hydrodynamic circular tube, a foam circular tube, an inner supporting square tube, an upper end hinged arc plate, a lower end hinged arc plate, an upper internal fixed workpiece, a lower internal fixed workpiece, an upper three-part force sensor and a lower three-part force sensor;

[0010] The upper internal fixed workpiece and the lower internal fixed workpiece are respectively fixed on the two ends of the inner supporting square tube, and the inner supporting square tube is fixedly connected to the middle flange workpiece of the top fixed structure module through the upper internal fixed workpiece, the upper three-force sensor and the lower three-force sensor are respectively fixed on the upper internal fixed workpiece and the lower internal fixed workpiece, the foam circular tube is tightly wrapped on the inner supporting square tube, the upper end hinged arc plate and the lower end hinged circular plate are respectively fixed on the upper three-force sensor and the lower three-force sensor, and the upper end hinged arc plate and the lower end hinged circular plate are tightly contacted and connected with the two ends of the external hydrodynamic circular tube.

[0011] Preferably, the lower baffle module comprises a lower baffle and an outer clamping circular plate flange, the lower baffle is fixedly mounted on the lower inner fixed workpiece via the outer clamping circular plate flange, and the lower baffle is clamped between the outer clamping circular plate flange and the lower inner fixed workpiece.

[0012] Preferably, one side of the middle flange is set to be a plane, and the other side is provided with a boss, and the boss is provided with a groove. The boss is embedded in the square hole in the middle of the upper baffle module, and the height of the boss is consistent with the thickness of the upper baffle module, and the groove is consistent with the end cross-sectional shape of the upper internal fixed workpiece.

[0013] Preferably, the upper end hinged arc plate comprises an upper hinged arc plate workpiece and an upper limit workpiece; the upper hinged arc plate workpiece is fixedly connected to the upper three-force sensor, and the upper hinged arc plate workpiece is fixed to the upper internal fixed workpiece through the upper three-force sensor; the lower hinged arc plate workpiece is fixedly connected to the lower three-force sensor, and the lower hinged arc plate workpiece is fixed to the upper internal fixed workpiece through the lower three-force sensor;

[0014] The upper position-limiting workpiece is installed on the upper surface of the upper hinged arc plate workpiece, and the lower position-limiting workpiece is installed on the lower surface of the lower hinged arc plate workpiece.

[0015] Preferably, a plurality of L-shaped holes are provided on the upper hinged arc plate workpiece and the lower hinged arc plate workpiece, the L-shaped boss arranged on the end of the upper internal fixed workpiece passes through the L-shaped hole on the upper hinged arc plate workpiece, and the L-shaped boss on the end of the lower internal fixed workpiece passes through the L-shaped hole on the lower hinged arc plate workpiece.

[0016] Preferably, the circumferential sides of the upper hinged circular arc plate workpiece and the lower hinged circular arc plate workpiece are semicircular structures, and sensor routing gaps are provided on the upper hinged circular arc plate workpiece and the lower hinged circular arc plate workpiece.

[0017] Preferably, the upper inner fixed workpiece includes an upper embedded workpiece and an upper outer clamping flange workpiece, one end of the upper embedded workpiece is provided with four L-shaped bosses, and matches with the grooves on the middle flange workpiece, the other end of the upper embedded workpiece is embedded in the upper end inner wall of the inner supporting square tube, the upper outer clamping flange workpiece is fixed to the upper end outer wall of the inner supporting square tube by bolts, and is fixedly connected to the upper embedded workpiece;

[0018] The lower internal fixed workpiece includes a lower embedded workpiece and a lower external clamping flange workpiece. One end of the lower embedded workpiece is provided with four L-shaped bosses and is fixedly connected to the lower baffle plate and the external clamping circular plate flange; the other end of the lower embedded workpiece is embedded in the lower end inner wall of the inner supporting square tube, and the lower external clamping flange workpiece is fixed to the lower end outer wall of the inner supporting square tube by bolts and is fixedly connected to the lower embedded workpiece.

[0019] Preferably, the foam tube is made of EPS foam material, and the outer diameter of the foam original tube is 5-10 mm smaller than the inner diameter of the hydrodynamic tube 15 .

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The test device provided by the present invention can accurately measure the hydrodynamic load of the real-scale riser with ultra-high Reynolds number, avoiding the shortcomings of the traditional cantilever test method sensor suffering from large bending moment test data distortion and sensor damage;

[0022] 2. The present invention can avoid the huge bending moment generated by the three-division force sensor of the full-scale riser under ultra-high Reynolds number, and effectively ensure the measurement accuracy of the hydrodynamic load;

[0023] 3. The device disclosed in the present invention has a lower rigidity requirement for the three-force sensor, and does not need to use a special sensor, which is beneficial to saving experimental costs;

[0024] 4. The experimental device disclosed in the present invention has a light structure and is easy to install. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0026] Figure 1 It is an axial perspective view of a full-scale riser hydrodynamic load test device of the present invention;

[0027] Figure 2 This is an axonometric exploded view of the top fixed structure module and the upper baffle module in the present invention;

[0028] Figure 3 It is a three-dimensional exploded view of the axial side of a real-scale riser module in the present invention;

[0029] Figure 4 This is an axonometric exploded view of the lower baffle structure of the present invention;

[0030] Figure 5 It is an axonometric stereogram of the intermediate flange workpiece in the present invention;

[0031] Figure 6 It is a schematic diagram of the upper baffle module of the present invention;

[0032] Figure 7 It is an axonometric stereogram of the upper and lower hinged arc plate workpiece in the present invention;

[0033] Figure 8 It is an axonometric stereogram of the upper and lower embedded workpieces in the present invention;

[0034] Fig. 9 This is an axonometric stereogram of the inner support square tube in the present invention;

[0035] Fig.10 It is an axonometric stereogram of the foam circular tube in the present invention.

[0036] Description of Reference Numerals

[0037] Towing pool trailer1 Foam round tube14

[0038] Top fixed structure module 2 Hydrodynamic round pipe 15

[0039] Upper baffle module 3 Lower external clamp flange workpiece 16

[0040] Full-scale riser module 4 Lower embedded workpiece 17

[0041] Lower baffle module 5 Lower three-point force sensor 18

[0042] Top fixed truss structure 6 Lower hinged arc plate workpiece 19

[0043] Middle flange workpiece 7 Lower limit workpiece 20

[0044] Upper hinged arc plate workpiece 8 Lower baffle 21

[0045] Upper limit workpiece 9 External clamping round plate flange 22

[0046] The upper end of the upper three-point force sensor 10 is hinged to the arc plate 23

[0047] The upper part is embedded with the workpiece 11 and the lower part is hinged with the arc plate 24

[0048] Upper outer flange workpiece 12 Upper inner fixed workpiece 25

[0049] Inner support square tube 13 Lower inner fixed workpiece 26 DETAILED DESCRIPTION

[0050] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0051] The present invention discloses a full-scale riser hydrodynamic load test device, referring to Figure 1 As shown, it includes: a towing pool trailer 1, a top fixed structure module 2, an upper baffle module 3, a full-scale riser module 4 and a lower baffle module 5.

[0052] The top fixed structure module 2 is fixedly mounted on the supporting structure of the marine engineering towing tank trailer 1, the upper baffle module 3 is mounted on the top fixed structure module 2, one end of the full-scale riser module 4 is fixedly mounted on the upper baffle module 3, and the lower baffle module 5 is fixedly mounted on the other end of the full-scale riser module 4.

[0053] Reference Figure 2 As shown, the top fixed structure module 2 includes a top fixed truss structure 6 and an intermediate flange workpiece 7, wherein the top fixed truss structure 6 is made of high-strength stainless steel to prevent structural corrosion. One end of the top fixed truss structure 6 is fixedly connected to the support structure of the marine engineering towing tank trailer 1 by flange bolts. The other end of the top fixed truss structure 6 is welded with a flange plate, and is fixedly connected to the intermediate flange workpiece 7 through the flange plate, and the intermediate flange workpiece 7 is fixedly connected to the full-scale riser module 4.

[0054] Reference Figure 3 As shown, the full-scale riser module 4 includes an outer hydrodynamic circular tube 15, a foam circular tube 14, an inner supporting square tube 13, an upper end hinged arc plate 23, a lower end hinged arc plate 24, an upper internal fixed workpiece 25, a lower internal fixed workpiece 26, an upper three-force sensor 10 and a lower three-force sensor 18.

[0055] The upper internal fixed workpiece 25 and the lower internal fixed workpiece 26 are respectively fixed on the two ends of the inner supporting square tube 13, and the inner supporting square tube 13 is fixedly connected to the middle flange workpiece 7 of the top fixed structure module 2 through the upper internal fixed workpiece 25. The upper three-force sensor 10 and the lower three-force sensor 18 are respectively fixed on the upper internal fixed workpiece 25 and the lower internal fixed workpiece 26. The foam circular tube 14 is tightly wrapped on the inner supporting square tube 13, and the upper end hinged arc plate 23 and the lower end hinged arc plate 24 are respectively fixed on the upper three-force sensor 10 and the lower three-force sensor 18, and the upper end hinged arc plate 23 and the lower end hinged arc plate 24 are tightly contacted and connected with the two ends of the external hydrodynamic circular tube 15.

[0056] Reference Figure 4 As shown, the lower baffle module 5 includes a lower baffle 21 and an outer clamping circular plate flange 22. The lower baffle 21 is made of carbon fiber material, which can effectively reduce the mass of the cantilever end of the overall test structure and improve the overall natural frequency of the structure. The lower baffle 21 is fixedly mounted on the lower internal fixed workpiece 26 through the outer clamping circular plate flange 22, and the lower baffle 21 is clamped and fixed between the outer clamping circular plate flange 22 and the lower internal fixed workpiece 26.

[0057] Reference Figure 5 As shown, one side of the middle flange workpiece 7 is set as a plane, and the other side is provided with a boss, and a groove is opened on the boss. The boss is embedded in the square hole in the middle of the upper baffle module 3 and fixed with bolts, and the height of the boss is consistent with the thickness of the upper baffle module 3, and the groove is consistent with the end cross-sectional shape of the upper internal fixed workpiece 25, which can effectively ensure the positioning and installation of the upper internal fixed workpiece 25.

[0058] like Figure 6 As shown, the upper baffle module 3 is made of organic glass with a square hole in the middle, which cooperates with the boss on the middle flange workpiece 7 of the top fixed structure module 2. The upper baffle module 3 and the middle flange workpiece 7 are connected by bolts. The upper baffle module 3 can shield the top fixed structure module 2 from the influence of the flow field on the hydrodynamic circular tube 15, and can also ensure that the observation field is not blocked.

[0059] like Figure 7 As shown, the upper end hinged arc plate 23 includes an upper hinged arc plate workpiece 8 and an upper limit workpiece 9; the upper hinged arc plate workpiece 8 is fixedly connected to the upper three-force sensor 10, and the upper hinged arc plate workpiece 8 is fixed on the upper internal fixed workpiece 25 through the upper three-force sensor 10; the lower end hinged arc plate 24 includes a lower hinged arc plate workpiece 19 and a lower limit workpiece 20, the lower hinged arc plate workpiece 19 is fixedly connected to the lower three-force sensor 18, and the lower hinged arc plate workpiece 19 is fixed on the upper internal fixed workpiece 25 through the lower three-force sensor 18. The upper hinged arc plate workpiece 8 and the lower hinged arc plate workpiece 19 are both circular plate workpieces, and their circumferential side edges are semicircular structures. A sensor routing gap with a width of about 20 mm is opened at 1 / 4 of the arc plate workpiece, so that the upper three-force sensor 10 and the lower three-force sensor 18 do not contact the arc plate workpiece.

[0060] The upper limit workpiece 9 is installed on the upper surface of the upper hinged arc plate workpiece 8, and the lower limit workpiece 20 is installed on the lower surface of the lower hinged arc plate workpiece 19. The upper limit workpiece 9 and the lower limit workpiece 20 are respectively installed at three quarter quadrants of the upper hinged arc plate workpiece 8 and the lower hinged arc plate workpiece 19, and appear in pairs up and down, thereby limiting the up and down movement of the hydrodynamic circular tube 15.

[0061] Multiple L-shaped holes are provided on the upper hinged arc plate workpiece 8 and the lower hinged arc plate workpiece 19. The L-shaped boss arranged on the end of the upper internal fixed workpiece 25 passes through the L-shaped hole on the upper hinged arc plate workpiece 8, and the L-shaped boss on the end of the lower internal fixed workpiece 26 passes through the L-shaped hole on the lower hinged arc plate workpiece 19.

[0062] like Figure 8As shown, the upper internal fixed workpiece 25 includes an upper embedded workpiece 11 and an upper external clamping flange workpiece 12, one end of the upper embedded workpiece 11 is provided with four L-shaped bosses, and matches with the grooves on the middle flange workpiece 7, the other end of the upper embedded workpiece 11 is embedded in the upper inner wall of the inner supporting square tube 13, the upper external clamping flange workpiece 12 is fixed to the upper outer wall of the inner supporting square tube 13 by bolts, and is fixedly connected to the upper embedded workpiece 11; the bolts pass through the four upper external clamping flange workpieces and the inner supporting square tube 13, and are tightened on the upper embedded workpiece 11, so that the inner supporting square tube 13 and the upper embedded workpiece 11 are firmly together.

[0063] The lower internal fixed workpiece 26 includes a lower embedded workpiece 17 and a lower external clamping flange workpiece 16. One end of the lower embedded workpiece 17 is provided with four L-shaped bosses and is fixedly connected to the lower baffle 21 and the external clamping circular plate flange 22; the other end of the lower embedded workpiece 17 is embedded in the lower end inner wall of the inner supporting square tube 13, and the lower external clamping flange workpiece 16 is fixed to the lower end outer wall of the inner supporting square tube 13 by bolts and is fixedly connected to the lower embedded workpiece 17.

[0064] Reference Fig. 9 As shown, the inner supporting square tube 13 is made of carbon fiber material, which can provide high strength and high rigidity, and can ensure the support of the full-scale hydrodynamic circular tube 15 during the experiment, while facilitating the measurement direction of the sensor.

[0065] Reference Fig.10 As shown, the foam tube 14 is made of lightweight EPS foam material, and the outer diameter of the foam original tube is 5-10 mm smaller than the inner diameter of the hydrodynamic tube 15, so as to discharge the fluid in the hydrodynamic tube 15 during the experiment and reduce the influence on the experimental hydrodynamics.

[0066] The installation and implementation process of this example is as follows:

[0067] Before the formal experimental test, the various components of the experimental device are designed according to the actual diameter of the full-scale riser to be tested, the specific conditions of the test flow rate conditions, the size of the laboratory towing pool, and the economy of the experimental device. After the production of the experimental components is completed, the detailed installation steps are as follows:

[0068] First, install the full-scale riser module 4, the upper end hinged arc plate 23, the upper three-part force sensor 10, the lower three-part force sensor 18, the upper internal fixed workpiece 25, and the lower internal fixed workpiece 26 on the inner supporting square tube 13, and tightly fit the foam circular tube 14 on the inner supporting square tube 13, and then push the hydrodynamic circular tube 15 from the bottom to the upper end hinged arc plate 23, and install the lower end hinged arc plate 24, so that the hydrodynamic circular tube 15 cannot move axially.

[0069] Next, assemble the top fixed truss structure 6 and the middle flange workpiece 7 into the top fixed structure module 2, install the upper baffle module 3, and install the full-scale riser module 4 assembled in the previous step on the top fixed structure module 2 by bolts. Then install the lower baffle module 5.

[0070] Finally, the formed device is installed on the structure of the marine engineering towing tank trailer 1 through the top fixed structure module 2 flange plate. The trailer is started to form a background flow field, and the load of the hydrodynamic circular tube 15 acts on the upper end hinged arc plate 23 and the lower end hinged arc plate 24, and then the load is transferred to the upper three-force sensor 10 and the lower three-force sensor 18. The upper three-force sensor 10 and the lower three-force sensor 18 detect the hydrodynamic load on the hydrodynamic circular tube 15.

[0071] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0072] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A full-scale riser hydrodynamic load test device, characterized in that: include: A towing tank trailer (1), a top fixed structure module (2), an upper baffle module (3), a full-scale riser module (4) and a lower baffle (21) module (5); The top fixed structure module (2) is fixedly mounted on the towing pool trailer (1), the upper baffle module (3) is mounted on the top fixed structure module (2), one end of the full-scale riser module (4) is fixedly mounted on the upper baffle module (3), and the lower baffle module (5) is fixedly mounted on the other end of the full-scale riser module (4); The top fixed structure module (2) comprises a top fixed truss structure (6) and an intermediate flange workpiece (7), one end of the top fixed truss structure (6) is fixedly connected to the towing pool trailer (1), the other end of the top fixed truss structure (6) is welded with a flange plate and is fixedly connected to the intermediate flange workpiece (7) via the flange plate, and the intermediate flange workpiece (7) is fixedly connected to the full-scale riser module (4); The full-scale riser module (4) comprises an outer hydrodynamic circular tube (15), a foam circular tube (14), an inner supporting square tube (13), an upper end hinged arc plate (23), a lower end hinged arc plate (24), an upper internal fixed workpiece (25), a lower internal fixed workpiece (26), an upper three-part force sensor (10) and a lower three-part force sensor (18); The upper internal fixed workpiece (25) and the lower internal fixed workpiece (26) are respectively fixed on the two ends of the inner supporting square tube (13); the inner supporting square tube (13) is fixedly connected to the middle flange workpiece (7) of the top fixed structure module (2) through the upper internal fixed workpiece (25); the upper three-force sensor (10) and the lower three-force sensor (18) are respectively fixed on the upper internal fixed workpiece (25) and the lower internal fixed workpiece (26); the foam circular tube (14) is tightly wrapped on the inner supporting square tube (13); the upper end hinged arc plate (23) and the lower end hinged arc plate (24) are respectively fixed on the upper three-force sensor (10) and the lower three-force sensor (18); and the upper end hinged arc plate (23) and the lower end hinged circular plate (24) are tightly contacted and connected with the two ends of the outer hydrodynamic circular tube (15).

2. The full-scale riser hydrodynamic load test device according to claim 1, characterized in that: The lower baffle module (5) comprises a lower baffle (21) and an outer clamping circular plate flange (22); the lower baffle (21) is fixedly mounted on the lower inner fixed workpiece (26) via the outer clamping circular plate flange (22); and the lower baffle (21) is clamped and fixed between the outer clamping circular plate flange (22) and the lower inner fixed workpiece (26).

3. The full-scale riser hydrodynamic load test device according to claim 1, characterized in that: One side of the intermediate flange workpiece (7) is arranged as a plane, and the other side is arranged with a boss, and a groove is provided on the boss. The boss is embedded in the square hole in the middle of the upper baffle module (3), and the height of the boss is consistent with the thickness of the upper baffle module (3), and the groove is consistent with the cross-sectional shape of the end of the upper internal fixing workpiece (25).

4. The full-scale riser hydrodynamic load test device according to claim 1, characterized in that: The upper end hinged arc plate (23) comprises an upper hinged arc plate workpiece (8) and an upper limit workpiece (9); the upper hinged arc plate workpiece (8) is fixedly connected to the upper three-force sensor (10), and the upper hinged arc plate workpiece (8) is fixed to the upper inner fixed workpiece (25) via the upper three-force sensor (10); The lower end hinged arc plate (24) comprises a lower hinged arc plate workpiece (19) and a lower limit workpiece (20), the lower hinged arc plate workpiece (19) is fixedly connected to the lower three-force sensor (18), and the lower hinged arc plate workpiece (19) is fixed to the upper inner fixed workpiece (25) through the lower three-force sensor (18); The upper limiting workpiece (9) is mounted on the upper surface of the upper hinged arc plate workpiece (8), and the lower limiting workpiece (20) is mounted on the lower surface of the lower hinged arc plate workpiece (19).

5. The full-scale riser hydrodynamic load test device according to claim 4, characterized in that: The upper hinged arc plate workpiece (8) and the lower hinged arc plate workpiece (19) are both provided with a plurality of L-shaped holes, the L-shaped boss provided on the end of the upper internal fixed workpiece (25) passes through the L-shaped hole on the upper hinged arc plate workpiece (8), and the L-shaped boss provided on the end of the lower internal fixed workpiece (26) passes through the L-shaped hole on the lower hinged arc plate workpiece (19).

6. The full-scale riser hydrodynamic load test device according to claim 4, characterized in that: The circumferential sides of the upper hinged arc plate workpiece (8) and the lower hinged arc plate workpiece (19) are semicircular structures, and sensor wiring gaps are provided on the upper hinged arc plate workpiece (8) and the lower hinged arc plate workpiece (19).

7. The full-scale riser hydrodynamic load test device according to claim 1, characterized in that: The upper internal fixed workpiece (25) comprises an upper embedded workpiece (11) and an upper external flange workpiece (12); one end of the upper embedded workpiece (11) is provided with four L-shaped bosses, which match the grooves on the middle flange workpiece (7); the other end of the upper embedded workpiece (11) is embedded in the upper inner wall of the inner supporting square tube (13); the upper external flange workpiece (12) is fixed to the upper outer wall of the inner supporting square tube (13) by bolts, and is fixedly connected to the upper embedded workpiece (11); The lower internal fixed workpiece (26) comprises a lower embedded workpiece (17) and a lower external clamping flange workpiece (16); one end of the lower embedded workpiece (17) is provided with four L-shaped bosses and is fixedly connected to the lower baffle plate (21) and the external clamping circular plate flange (22); the other end of the lower embedded workpiece (17) is embedded in the lower end inner wall of the inner supporting square tube (13); the lower external clamping flange workpiece (16) is fixed to the lower end outer wall of the inner supporting square tube (13) by bolts and is fixedly connected to the lower embedded workpiece (17).

8. The full-scale riser hydrodynamic load testing device according to claim 1, characterized in that: The foam circular tube (14) is made of EPS foam material, and the outer diameter of the foam circular tube is 5-10 mm smaller than the inner diameter of the hydrodynamic circular tube (15).

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