Device and method for testing influence of vortex-induced oscillation on suspended section of submarine cable

Abstract

The invention discloses a device and method for testing the influence of vortex-induced oscillation on a suspended section of a submarine cable, and the device comprises a submarine cable connection module, a vortex-induced oscillation motion generation module, and a force displacement sensing module. Setting the bending angle of the suspended section of the to-be-measured submarine cable as a preset bending angle and setting the span of the suspended section of the to-be-measured submarine cable as a preset span through a submarine cable connecting module; applying a preset external force to the suspended section of the to-be-tested submarine cable through a vortex-induced oscillation motion generation module, and controlling the motion direction of the suspended section of the to-be-tested submarine cable and the motion time corresponding to the motion direction; through a force displacement sensing module, the stress and displacement of the suspended section of the submarine cable to be measured under the conditions of a preset bending angle, a preset span, a preset external force, a movement direction and movement time are obtained. By implementing the device and the method, the impending section vortex-induced oscillation influence of the high-voltage submarine cable can be tested.

Description

Technical Field

[0001] The invention relates to the technical field of submarine cable testing, and in particular to a testing device and method for the influence of vortex-induced oscillation on a suspended section of a submarine cable. Background Art

[0002] With the rapid development of marine energy development and submarine power transmission technology, the demand for high-voltage submarine cables in future power systems is increasing. Submarine cables are an important part of marine power system engineering, and their safety and reliability are directly related to the stable operation of the entire system. However, in complex marine environments, submarine cables often have suspended sections exposed to the action of marine fluids, which are prone to vortex-induced oscillations. Vortex-induced oscillations are vibrations caused by periodic vortex shedding. Frequent and strong vortex-induced oscillations, especially vortex-induced resonances caused by specific frequencies, may cause fatigue damage to submarine cables, structural deformation, and even fracture, seriously affecting the life and function of submarine cables.

[0003] At present, the research on vortex-induced oscillation of submarine cables is mostly focused on theoretical analysis and numerical simulation, while the experimental testing method relies on laboratory water tanks to simulate the marine environment. However, the experimental cases of this method can only be used to test submarine cables with lower voltage levels.

[0004] Therefore, how to test the influence of vortex-induced oscillation on the suspended section of high-voltage submarine cables is an issue that needs to be solved urgently. Summary of the invention

[0005] The present invention provides a testing device and method for the influence of vortex-induced oscillation on the suspended section of a submarine cable, which can realize the testing of the influence of vortex-induced oscillation on the suspended section of a high-voltage submarine cable.

[0006] An embodiment of the present invention provides a testing device for the influence of vortex-induced oscillation on the suspended section of a submarine cable, comprising: a submarine cable connection module, a vortex-induced oscillation motion generation module, and a force displacement sensing module;

[0007] The submarine cable connection module comprises: a first position adjustable groove, a second position adjustable groove, a left sliding sleeve, a right sliding sleeve and a semi-arched track; the submarine cable connection module is used to set the bending angle of the suspended section of the submarine cable to be tested to a preset bending angle through the left sliding sleeve and the right sliding sleeve and fix it on the semi-arched track, and set the span of the suspended section of the submarine cable to be tested to a preset span through the first position adjustable groove and the second position adjustable groove;

[0008] The vortex-induced oscillation motion generating module comprises: a vortex-induced oscillation motion generating arm, a first motion control motor, a second motion control motor, a first rotating shaft and a second rotating shaft; the vortex-induced oscillation motion generating module is used to control the vortex-induced oscillation motion generating arm through the first motion control motor and the second motion control motor to apply a preset external force to the suspended section of the submarine cable to be tested, and to control the first rotating shaft through the first motion control motor and the second motion control motor to control the second rotating shaft, so as to control the movement direction of the suspended section of the submarine cable to be tested and the movement time corresponding to the movement direction;

[0009] The force-displacement sensing module comprises: a first displacement sensor, a second displacement sensor, a first stress sensor and a second stress sensor; the first displacement sensor and the second displacement sensor are respectively embedded in the two ends of the vortex-induced oscillation motion generating arm, and the first stress sensor and the second stress sensor are respectively located on both sides of the outer protective sheath of the submarine cable to be tested; the force-displacement sensing module is used to obtain the stress and displacement of the suspended section of the submarine cable to be tested at the preset bending angle, the preset span, the preset external force, the movement direction and the movement time according to the first displacement sensor, the second displacement sensor, the first stress sensor and the second stress sensor.

[0010] Furthermore, the above-mentioned submarine cable connection module also includes: a first base, a second base and a semi-arched submarine cable rack; the above-mentioned first position adjustable groove is installed in the first base, the above-mentioned second position adjustable groove is installed in the second base, and the two ends of the above-mentioned semi-arched submarine cable rack are respectively perpendicular to the ground and fixed in the above-mentioned first position adjustable groove and the above-mentioned second position adjustable groove.

[0011] Furthermore, the above-mentioned submarine cable connection module also includes: a limiter; the above-mentioned semi-arched track is fixed in parallel to the above-mentioned semi-arched submarine cable rack, and the above-mentioned limiter is installed on the above-mentioned semi-arched submarine cable rack.

[0012] Furthermore, the vortex-induced oscillation motion generating module further includes:

[0013] A first height adjustable frame, a second height adjustable frame, a first support column, a second support column, a first rotatable periodic motion slide table, a second rotatable periodic motion slide table, a motion controller, a first slide base plate, a second slide base plate, a first slide rail, and a second slide rail;

[0014] The above-mentioned vortex-induced oscillation motion generating arm is fixed on the above-mentioned first rotatable periodic motion slide platform and the second rotatable periodic motion slide platform, the above-mentioned first height-adjustable frame is connected to the above-mentioned first slide rail base plate through the above-mentioned first support column, and the above-mentioned second height-adjustable frame is connected to the above-mentioned second slide rail base plate through the above-mentioned second support column, the above-mentioned first rotating axis is located in the middle of the above-mentioned first slide rail, the above-mentioned second rotating axis is located in the middle of the above-mentioned second slide rail, the above-mentioned first slide rail base plate and the above-mentioned second slide rail base plate are respectively located at the two ends of the above-mentioned vortex-induced oscillation motion generating arm, the above-mentioned vortex-induced oscillation motion generating arm is respectively connected to the above-mentioned first rotating axis and the above-mentioned second rotating axis, the first end and the second end of the above-mentioned motion controller are respectively connected to one end of the above-mentioned first motion control motor and the above-mentioned second motion control motor, and the other end of the above-mentioned first motion control motor and the above-mentioned second motion control motor are connected to the above-mentioned vortex-induced oscillation motion generating arm.

[0015] Furthermore, the vortex-induced oscillation motion generating module further includes: a human-computer interaction interface; the human-computer interaction interface is connected to the third end of the motion controller.

[0016] Furthermore, the force displacement sensing module also includes: a signal processor and a data processing visualizer; one end of the first stress sensor, the second stress sensor, the first displacement sensor and the second displacement sensor is connected to one end of the signal processor, and the other end of the signal processor is connected to the data processing visualizer.

[0017] Based on the above-mentioned device item, the present invention provides a corresponding test method item embodiment;

[0018] The present invention provides a method for testing the influence of vortex-induced oscillation on the suspended section of a submarine cable, which is applicable to any one of the above-mentioned devices. The above-mentioned device for testing the influence of vortex-induced oscillation on the suspended section of a submarine cable comprises:

[0019] By means of the submarine cable connection module, the bending angle of the suspended section of the submarine cable to be tested is set to a preset bending angle, and the span of the suspended section of the submarine cable to be tested is set to a preset span;

[0020] Apply a preset external force to the suspended section of the submarine cable to be tested through the vortex-induced oscillation motion generating module, and control the motion direction of the suspended section of the submarine cable to be tested and the motion time corresponding to the motion direction;

[0021] Through the force-displacement sensing module, the stress and displacement of the suspended section of the submarine cable to be tested under the preset bending angle, the preset span, the preset external force, the movement direction and the movement time are obtained.

[0022] The embodiments of the present invention have the following beneficial effects:

[0023] The present invention provides a testing device and method for the influence of vortex-induced oscillation on the suspended section of a submarine cable. The above-mentioned device includes a submarine cable connection module, a vortex-induced oscillation motion generation module and a force-displacement sensing module; through the submarine cable connection module, the bending angle of the suspended section of the submarine cable to be tested is set to a preset bending angle, and the span of the suspended section of the submarine cable to be tested is set to a preset span; through the vortex-induced oscillation motion generation module, a preset external force is applied to the suspended section of the submarine cable to be tested, and the movement direction of the suspended section of the submarine cable to be tested and the movement time corresponding to the movement direction are controlled; through the force-displacement sensing module, the stress and displacement of the suspended section of the submarine cable to be tested under the preset bending angle, preset span, preset external force, movement direction and movement time are obtained. According to the present invention, the bending angle of the suspended section of the submarine cable to be tested can be set to a preset bending angle through the submarine cable connection module, and the span of the suspended section of the submarine cable to be tested can be set to a preset span. A preset external force is applied to the suspended section of the submarine cable to be tested through the vortex-induced oscillation motion generating module, and the movement direction of the suspended section of the submarine cable to be tested and the movement time corresponding to the above movement direction are controlled. Finally, the stress and displacement of the suspended section of the submarine cable to be tested under the above preset bending angle, the above preset span, the above preset external force, the above movement direction and the above movement time are obtained through the force-displacement sensing module, so as to realize the test of the influence of vortex-induced oscillation of the suspended section of the high-voltage submarine cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of a test device for the influence of vortex-induced oscillation on the suspended section of a submarine cable provided by an embodiment of the invention;

[0025] Figure 2 It is a schematic diagram of the structure of a vortex-induced oscillation motion generating module and a force displacement sensing module provided in an embodiment of the invention;

[0026] Figure 3 It is a flow chart of a method for testing the influence of vortex-induced oscillation on a suspended section of a submarine cable provided by an embodiment of the present invention.

[0027] Description of the accompanying drawings: first base 1, vortex-induced oscillation motion generating module 2, force displacement sensing module 3, second base 4, first position adjustable groove 5, second position adjustable groove 6, semi-arched submarine cable rack 7, left sliding sleeve 8, right sliding sleeve 9, limiter 10, semi-arched track 11, suspended section of submarine cable to be tested 12, first height adjustable frame 201, second height adjustable frame 202, first rotatable periodic motion slide rail platform 203, second rotatable periodic motion slide rail platform 204, vortex-induced oscillation motion generating arm 205, first Motion control motor 206, second motion control motor 207, motion controller 208, human-computer interaction interface 209, first support column 210, second support column 211, first slide rail 212, second slide rail 213, first slide rail base plate 214, second slide rail base plate 215, first rotation axis 216, second rotation axis 217, first displacement sensor 301, second displacement sensor 302, first stress sensor 303, second stress sensor 304, signal processor 305, data processing visualizer 306. DETAILED DESCRIPTION

[0028] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] like Figure 1 As shown, a testing device for the influence of vortex-induced oscillation on the suspended section of a submarine cable provided by one embodiment of the present invention comprises:

[0030] Submarine cable connection module, vortex-induced oscillation motion generation module 2 and force displacement sensing module 3;

[0031] The submarine cable connection module comprises: a first position adjustable groove 5, a second position adjustable groove 6, a left sliding sleeve 8, a right sliding sleeve 9 and a semi-arched track 11; the submarine cable connection module is used to set the bending angle of the suspended section 12 of the submarine cable to be tested to a preset bending angle through the left sliding sleeve 8 and the right sliding sleeve 9 and fix it on the semi-arched track 11, and set the span of the suspended section 12 of the submarine cable to be tested to a preset span through the first position adjustable groove 5 and the second position adjustable groove 6;

[0032] Specifically, the first position adjustable groove 5 and the second position adjustable groove 6 can adjust the left and right span of 5 to 12 m of the suspended section 12 of the submarine cable to be tested, and the bending angle of the suspended section 12 of the submarine cable to be tested can be adjusted by slidingly adjusting the positions of the left sliding sleeve 8 and the right sliding sleeve 9 on the semi-arched track 11, and the left sliding sleeve 8 and the right sliding sleeve 9 can fix the suspended section 12 of the submarine cable to be tested through their respective annular clamps and bolts, and the semi-arched track 11 is used to place the fixed suspended section 12 of the submarine cable to be tested.

[0033] Specifically, the structures of the vortex-induced oscillation motion generating module 2 and the force displacement sensing module 3 are as follows: Figure 2 As shown, the vortex-induced oscillation motion generating modules 2 are arranged in pairs before and after the suspended section 12 of the submarine cable to be tested, so as to achieve synchronous application of forces at different positions of the suspended cable. The vortex-induced oscillation motion generating arm 205 is in an arc shape, so as to achieve uniform force on the suspended section 12 of the submarine cable to be tested. The first motion control motor 206 and the second motion control motor 207 drive the first rotating shaft 216 and the second rotating shaft 217 to achieve linear periodic motion of the suspended section 12 of the submarine cable to be tested parallel to any direction of the cross section of the submarine cable. The number of vortex-induced oscillation motion generating modules 2 can be changed according to the experimental requirements to generate local force and overall force modes.

[0034] The vortex-induced oscillation motion generating module 2 comprises: a vortex-induced oscillation motion generating arm 205, a first motion control motor 206, a second motion control motor 16, a first rotating shaft 216 and a second rotating shaft 217; the vortex-induced oscillation motion generating module 2 is used to control the vortex-induced oscillation motion generating arm 205 to apply a preset external force to the suspended section 12 of the submarine cable to be tested through the first motion control motor 206 and the second motion control motor 207, and to control the first rotating shaft 216 and the second rotating shaft 217 through the first motion control motor 206 and the second motion control motor 207, so as to control the motion direction of the suspended section 12 of the submarine cable to be tested and the motion time corresponding to the motion direction;

[0035] The force-displacement sensing module 3 comprises: a first displacement sensor 301, a second displacement sensor 302, a first stress sensor 303 and a second stress sensor 304; the first displacement sensor 301 and the second displacement sensor 302 are respectively embedded in the two ends of the vortex-induced oscillation motion generating arm 205, and the first stress sensor 303 and the second stress sensor 304 are respectively located on both sides of the outer protective sheath of the submarine cable to be tested; the force-displacement sensing module 3 is used to obtain the stress and displacement of the suspended section 12 of the submarine cable to be tested under the preset bending angle, the preset span, the preset external force, the movement direction and the movement time according to the first displacement sensor 301, the second displacement sensor 302, the first stress sensor 303 and the second stress sensor 304.

[0036] Specifically, the first displacement sensor 301 and the second displacement sensor 302 can obtain the displacement of the submarine cable to be tested in real time, and the first stress sensor 303 and the second stress sensor 304 can obtain the stress of the submarine cable to be tested in real time.

[0037] The above-mentioned submarine cable connection module also includes: a first base 1, a second base 4 and a semi-arched submarine cable rack 7; the above-mentioned first position adjustable groove 5 is installed in the first base 1, and the above-mentioned second position adjustable groove 6 is installed in the second base 4, and the two ends of the above-mentioned semi-arched submarine cable rack 7 are respectively perpendicular to the ground and fixed in the above-mentioned first position adjustable groove 5 and the above-mentioned second position adjustable groove 6.

[0038] Specifically, the first base 1 and the second base 4 are used to fix the two ends of the suspended section 12 of the submarine cable to be tested together with the first groove and the second groove. The suspended section 12 of the submarine cable to be tested is placed in the semi-arched track 11 in the middle of the semi-arched submarine cable rack 7.

[0039] The above-mentioned submarine cable connection module also includes: a limiter 10; the above-mentioned semi-arched track 11 is fixed in parallel to the above-mentioned semi-arched submarine cable rack 7, and the above-mentioned limiter 10 is installed on the above-mentioned semi-arched submarine cable rack 7.

[0040] Specifically, the limiter 10 can limit the left sliding sleeve 8 and the right sliding sleeve 9 to the set positions on the track.

[0041] The above-mentioned vortex-induced oscillation motion generating module 2 further includes:

[0042] A first height adjustable frame 201, a second height adjustable frame 202, a first support column 210, a second support column 211, a first rotatable periodic motion slide table 203, a second rotatable periodic motion slide table 204, a motion controller 208, a first slide base plate 214, and a second slide base plate 215;

[0043] The vortex-induced oscillation motion generating arm 205 is fixed on the first rotatable periodic motion slide rail platform 203 and the second rotatable periodic motion slide rail platform 204. The first height-adjustable frame 201 is connected to the first slide rail base plate 214 through the first support column 210, and the second height-adjustable frame 202 is connected to the second slide rail base plate 215 through the second support column 211. The first rotating shaft 216 is located in the middle of the first slide rail 212, and the second rotating shaft 217 is located in the middle of the second slide rail 213. A slide rail base plate 214 and the second slide rail base plate 215 are respectively located at the two ends of the vortex-induced oscillation motion generating arm 205, and the vortex-induced oscillation motion generating arm 205 is respectively connected to the first rotating shaft 216 and the second rotating shaft 217, and the first end and the second end of the motion controller 208 are respectively connected to one end of the first motion control motor 206 and the second motion control motor 207, and the other end of the first motion control motor 206 and the second motion control motor 207 are connected to the vortex-induced oscillation motion generating arm 205.

[0044] Specifically, the first height adjustable frame 201 and the second height adjustable frame 202 can be used to control the suspended section of the submarine cable at different hanging heights, and at the same time, the first rotatable periodic motion slide platform 203 and the second rotatable periodic motion slide platform 204 are assisted to control the movement direction of the vortex-induced oscillation motion generating arm 205 to achieve the control of the movement direction of the suspended section 12 of the submarine cable to be measured. The first height adjustable frame 201 and the second height adjustable frame 202 are respectively bolted through the first support column 210 to The second support column 211 is connected to the first slide rail base plate 214 and the second slide rail base plate 215 on the first rotatable periodic motion slide rail platform 203 and the second rotatable periodic motion slide rail platform 204, and the vortex-induced oscillation motion generating arm 205 is used to apply a preset external force to the suspended section 12 of the submarine cable to be tested. The preset external force includes the frequency and amplitude of the external force. The motion controller 208 is used to control the first motion control motor 206 and the second motion control motor 207 to apply an external force with a set frequency and amplitude to the suspended section 12 of the submarine cable to be tested.

[0045] The vortex-induced oscillation motion generating module 2 further includes: a human-machine interaction interface 209 ; the human-machine interaction interface 209 is connected to the third end of the motion controller 208 .

[0046] Specifically, the human-computer interaction interface 209 is used to set the frequency, amplitude and movement time of the external force applied to the suspended section 12 of the submarine cable to be tested according to the voltage level of the submarine cable and the laying and operation status of the sea area.

[0047] The force displacement sensor module 3 further includes:

[0048] a signal processor 305 and a data processing visualizer 306;

[0049] One end of the first stress sensor 303 , the second stress sensor 304 , the first displacement sensor 301 and the second displacement sensor 302 is connected to one end of the signal processor 305 , and the other end of the signal processor 305 is connected to the data processing visualizer 306 .

[0050] Specifically, the signal processor 305 is used to amplify and eliminate interference signals in the signals obtained by the first stress sensor 303, the second stress sensor 304, the first displacement sensor 301 and the second displacement sensor 302, and convert the signals after interference removal into digital signals, and then transmit the digital signals to the data processing visualizer 306. The data processing visualizer 306 is used to display the signals in the form of a curve on a computer, and this curve is the force-displacement curve.

[0051] Based on the above-mentioned device item embodiments, the present invention provides corresponding method item embodiments.

[0052] Indicatively, Figure 3 As shown, another embodiment of the present invention provides a method for testing the influence of vortex-induced oscillation on the suspended section of a submarine cable. The method is applicable to the testing device for the influence of vortex-induced oscillation on the suspended section of a submarine cable in any of the above embodiments, including:

[0053] Step S101: setting the bending angle of the suspended section of the submarine cable to be tested to a preset bending angle and setting the span of the suspended section of the submarine cable to be tested to a preset span through the submarine cable connection module;

[0054] In this step, the bending angle of the suspended section of the submarine cable to be tested is set to a preset bending angle through the left sliding sleeve and the right sliding sleeve in the submarine cable connection module, and the span of the suspended section of the submarine cable to be tested is set to a preset span through the first position adjustable groove and the second position adjustable groove.

[0055] Step S102: applying a preset external force to the suspended section of the submarine cable to be tested through the vortex-induced oscillation motion generating module, and controlling the motion direction of the suspended section of the submarine cable to be tested and the motion time corresponding to the motion direction;

[0056] In this step, the first motion control motor and the second motion control motor in the vortex-induced oscillation motion generating module control the vortex-induced oscillation generating arm to apply a preset external force to the suspended section of the submarine cable to be tested, and the first rotating axis and the second rotating axis control the movement direction of the suspended section of the submarine cable to be tested and the movement time corresponding to the movement direction.

[0057] Step S103: obtaining, through the force-displacement sensing module, the stress and displacement of the suspended section of the submarine cable to be tested under the preset bending angle, the preset span, the preset external force, the movement direction and the movement time.

[0058] In this step, the stress of the suspended section of the submarine cable to be tested under a preset bending angle, a preset span, a preset external force, a movement direction and a movement time is obtained through the first stress sensor and the second stress sensor in the force-displacement sensing module, and the displacement of the suspended section of the submarine cable to be tested under a preset bending angle, a preset span, a preset external force, a movement direction and a movement time is obtained through the first displacement sensor and the second displacement sensor.

[0059] By implementing the above-mentioned embodiments of the present invention, it is possible to test the influence of vortex-induced oscillation of the suspended section of a high-voltage submarine cable.

[0060] The above are preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications are also regarded as protection of the present invention.

Claims

1. A test device for the influence of vortex-induced oscillation on the suspended section of a submarine cable, characterized in that: include: Submarine cable connection module, vortex-induced oscillation motion generation module and force displacement sensing module; The submarine cable connection module comprises: a first position adjustable groove, a second position adjustable groove, a left sliding sleeve, a right sliding sleeve and a semi-arched track; the submarine cable connection module is used to set the bending angle of the suspended section of the submarine cable to be tested to a preset bending angle through the left sliding sleeve and the right sliding sleeve and fix it on the semi-arched track, and set the span of the suspended section of the submarine cable to be tested to a preset span through the first position adjustable groove and the second position adjustable groove; The vortex-induced oscillation motion generating module comprises: a vortex-induced oscillation motion generating arm, a first motion control motor, a second motion control motor, a first rotating shaft and a second rotating shaft; the vortex-induced oscillation motion generating module is used to control the vortex-induced oscillation motion generating arm through the first motion control motor and the second motion control motor to apply a preset external force to the suspended section of the submarine cable to be tested, and to control the first rotating shaft through the first motion control motor and the second motion control motor to control the second rotating shaft, so as to control the movement direction of the suspended section of the submarine cable to be tested and the movement time corresponding to the movement direction; The force-displacement sensing module comprises: a first displacement sensor, a second displacement sensor, a first stress sensor and a second stress sensor; the first displacement sensor and the second displacement sensor are respectively embedded in the two ends of the vortex-induced oscillation motion generating arm, and the first stress sensor and the second stress sensor are respectively located on both sides of the outer protective sheath of the submarine cable to be tested; the force-displacement sensing module is used to obtain the stress and displacement of the suspended section of the submarine cable to be tested under the preset bending angle, the preset span, the preset external force, the movement direction and the movement time according to the first displacement sensor, the second displacement sensor, the first stress sensor and the second stress sensor.

2. A test device for the influence of vortex-induced oscillation on the suspended section of a submarine cable according to claim 1, characterized in that: The submarine cable connection module also includes: a first base, a second base and a semi-arched submarine cable rack; the first position adjustable groove is installed in the first base, the second position adjustable groove is installed in the second base, and the two ends of the semi-arched submarine cable rack are respectively perpendicular to the ground and fixed in the first position adjustable groove and the second position adjustable groove.

3. A test device for the influence of vortex-induced oscillation on the suspended section of a submarine cable according to claim 2, characterized in that: The submarine cable connection module also includes: a limiter; the semi-arched track is fixed parallel to the semi-arched submarine cable rack, and the limiter is installed on the semi-arched submarine cable rack.

4. The testing device for the influence of vortex-induced oscillation on the suspended section of submarine cable according to claim 1 is characterized in that: The vortex-induced oscillation motion generating module further includes: A first height adjustable frame, a second height adjustable frame, a first support column, a second support column, a first rotatable periodic motion slide table, a second rotatable periodic motion slide table, a motion controller, a first slide base plate, a second slide base plate, a first slide rail, and a second slide rail; The vortex-induced oscillation motion generating arm is fixed on the first rotatable periodic motion slide platform and the second rotatable periodic motion slide platform, the first height-adjustable frame is connected to the first slide rail base plate through the first support column, and the second height-adjustable frame is connected to the second slide rail base plate through the second support column, the first rotating axis is located in the middle of the first slide rail, the second rotating axis is located in the middle of the second slide rail, the first slide rail base plate and the second slide rail base plate are respectively located at two ends of the vortex-induced oscillation motion generating arm, the vortex-induced oscillation motion generating arm is respectively connected to the first rotating axis and the second rotating axis, the first end and the second end of the motion controller are respectively connected to one end of the first motion control motor and the second motion control motor, and the other end of the first motion control motor and the second motion control motor are connected to the vortex-induced oscillation motion generating arm.

5. The testing device for the influence of vortex-induced oscillation on the suspended section of submarine cable according to claim 4 is characterized in that: The vortex-induced oscillation motion generating module further includes: a human-computer interaction interface; the human-computer interaction interface is connected to the third end of the motion controller.

6. A test device for the influence of vortex-induced oscillation on the suspended section of a submarine cable according to claim 5, characterized in that: The force displacement sensing module also includes: a signal processor and a data processing visualizer; one end of the first stress sensor, the second stress sensor, the first displacement sensor and the second displacement sensor is connected to one end of the signal processor, and the other end of the signal processor is connected to the data processing visualizer.

7. A method for testing the influence of vortex-induced oscillation on the suspended section of a submarine cable, applicable to the testing device for the influence of vortex-induced oscillation on the suspended section of a submarine cable as claimed in any one of claims 1 to 6, characterized in that: include: By means of the submarine cable connection module, the bending angle of the suspended section of the submarine cable to be tested is set to a preset bending angle, and the span of the suspended section of the submarine cable to be tested is set to a preset span; Applying a preset external force to the suspended section of the submarine cable to be tested through the vortex-induced oscillation motion generating module, and controlling the motion direction of the suspended section of the submarine cable to be tested and the motion time corresponding to the motion direction; The force-displacement sensing module is used to obtain the stress and displacement of the suspended section of the submarine cable to be tested under the preset bending angle, the preset span, the preset external force, the movement direction and the movement time.

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