Testing device and method for simulating loading of mooring chain by floating platform in laboratory

Abstract

The invention discloses a test device for simulating a floating platform to load a mooring chain in a laboratory in the technical field of ocean engineering. The test device comprises a loading profile, a transverse loading mechanism and a longitudinal loading mechanism, wherein the transverse loading mechanism and the longitudinal loading mechanism are oppositely arranged on the two sides of the loading profile; the transverse loading mechanism can enable the loading profile to do transverse simple harmonic motion, the longitudinal loading mechanism can enable the loading profile to do longitudinal simple harmonic motion, and the transverse loading mechanism can absorb the longitudinal simple harmonic motion of the loading profile. And the longitudinal loading mechanism can absorb the transverse simple harmonic motion of the loading profile, so that the two-dimensional motion can be coupled on the loading profile.

Description

Technical Field

[0001] The present invention relates to the technical field of ocean engineering, and particularly relates to a test device and method for simulating the loading of a mooring chain by a floating platform in a laboratory. Background Art

[0002] With the continuous development of offshore wind power towards deep sea and far sea, floating wind power foundation structures play an increasingly important role. Floating wind power generally consists of an upper structure (floating platform and wind turbine) and a floating foundation (mooring chain and anchor foundation). Due to the action of cyclic loads such as wind and waves, the upper structure pulls the mooring chain to make cyclic reciprocating movements, thereby generating cyclic loads on the mooring chain.

[0003] Under the action of cyclic loads such as wind, wave and current, the floating platform has a very complex three-dimensional movement. The existing mooring chain test loading device simplifies the complex three-dimensional movement into three one-dimensional simple harmonic motions (longitudinal, transverse and vertical), and uses a control box, a motor and a sliding device to simulate the loading process of the mooring chain by the floating platform in a single dimension respectively.

[0004] Although studying the influence of the movement of the floating platform in a single dimension on the mechanical behavior of the mooring chain can simplify the problem to a certain extent, the actual loading process of the floating platform on the mooring chain is a complex three-dimensional movement. The influence of the movement in different dimensions on the mechanical behavior of the mooring chain, the turbulence generated by the movement of the mooring chain, and the disturbance of the mooring chain to the soil are not simple linear superpositions, and the "coupling effect" between the movements in different dimensions of the mooring chain cannot be simulated and studied. Summary of the Invention

[0005] The purpose of the present invention is to provide a test device for simulating the loading of a mooring chain by a floating platform in a laboratory, so as to solve the technical problem that the "coupling effect" between the movements in different dimensions of the mooring chain cannot be simulated and studied in the prior art.

[0006] To solve the above technical problem, the present invention specifically provides a test device for simulating the loading of a mooring chain by a floating platform in a laboratory, including:

[0007] A loading profile and a transverse loading mechanism and a longitudinal loading mechanism oppositely arranged on both sides of the loading profile;

[0008] The transverse loading mechanism can make the loading profile perform a transverse simple harmonic motion, the longitudinal loading mechanism can make the loading profile perform a longitudinal simple harmonic motion, the transverse loading mechanism can absorb the longitudinal simple harmonic motion of the loading profile, and the longitudinal loading mechanism can absorb the transverse simple harmonic motion of the loading profile, so that the movements in two dimensions can be coupled on the loading profile;

[0009] Wherein, the motion periods of the transverse loading mechanism and the longitudinal loading mechanism can both be adjusted to achieve harmonic motion with the same or different periods in two dimensions of the loaded profile;

[0010] Wherein, the motion distances of the transverse loading mechanism and the longitudinal loading mechanism can both be adjusted to achieve harmonic motion with the same or different amplitudes in two dimensions of the loaded profile.

[0011] As a preferred embodiment of the present invention, the transverse loading mechanism includes a longitudinal displacement absorption mechanism installed on the loaded profile for absorbing the longitudinal harmonic motion of the loaded profile;

[0012] On the side of the longitudinal displacement absorption mechanism away from the loaded profile, a transverse displacement application mechanism is connected for applying a reciprocating transverse pushing and pulling force to the loaded profile to make the loaded profile perform transverse harmonic motion;

[0013] The longitudinal loading mechanism includes a transverse displacement absorption mechanism installed on the loaded profile for absorbing the transverse harmonic motion of the loaded profile;

[0014] On the side of the transverse displacement absorption mechanism away from the loaded profile, a longitudinal displacement application mechanism is connected for applying a reciprocating longitudinal pushing and pulling force to the loaded profile to make the loaded profile perform longitudinal harmonic motion.

[0015] As a preferred embodiment of the present invention, the longitudinal displacement absorption mechanism includes a longitudinally fixed absorption slider fixedly installed on the loaded profile and a longitudinally fixed absorption guide rail slidably connected to the longitudinally fixed absorption slider, and the transverse displacement application mechanism is connected to the longitudinally fixed absorption guide rail;

[0016] The transverse displacement absorption mechanism includes a transversely fixed absorption slider fixedly installed on the loaded profile and a transversely fixed absorption guide rail slidably connected to the transversely fixed absorption slider, and the longitudinal displacement application mechanism is connected to the transversely fixed absorption guide rail.

[0017] As a preferred embodiment of the present invention, the transverse displacement application mechanism includes a transversely fixed positioning guide rail fixedly installed on the profile frame, a transversely fixed positioning slider slidably connected to the transversely fixed positioning guide rail, a longitudinally arranged transverse displacement guide rail fixedly connected to the transversely fixed positioning slider through a first adapter plate, a transverse displacement slider slidably connected to the transverse displacement guide rail, and a transverse loading rocker arm rotatably connected to the transverse displacement slider;

[0018] Wherein, the longitudinally fixed absorption guide rail is fixedly connected to the first adapter plate through a first connecting profile to conduct transverse displacement to the longitudinally fixed absorption guide rail and the loaded profile;

[0019] The cooperation between each guide rail and each slider between the loading profile and the lateral loading rocker arm can convert the circumferential rotation of the lateral loading rocker arm in the plane into the lateral harmonic motion of the loading profile.

[0020] As a preferred embodiment of the present invention, the longitudinal displacement applying mechanism includes a longitudinal positioning guide rail fixedly installed on the profile frame, a longitudinal positioning slider slidably connected to the longitudinal positioning guide rail, a laterally arranged longitudinal displacement guide rail fixedly connected to the longitudinal positioning slider through a second adapter plate, a longitudinal displacement slider slidably connected to the longitudinal displacement guide rail, and a longitudinal loading rocker arm rotatably connected to the longitudinal displacement slider;

[0021] Wherein, the lateral absorption guide rail is fixedly connected to the second adapter plate through a second connecting profile to conduct lateral displacement to the lateral absorption guide rail and the loading profile;

[0022] The cooperation between each guide rail and each slider between the loading profile and the longitudinal loading rocker arm can convert the circumferential rotation of the longitudinal loading rocker arm in the plane into the longitudinal harmonic motion of the loading profile.

[0023] As a preferred embodiment of the present invention, the rotational connection mode between the lateral loading rocker arm and the lateral displacement slider is the same as the rotational connection mode between the longitudinal loading rocker arm and the longitudinal displacement slider;

[0024] The lateral loading rocker arm is fixedly connected to the first bearing seat, the lateral displacement slider is fixedly connected to the second bearing seat, and the first bearing seat is rotatably connected to the second bearing seat.

[0025] As a preferred embodiment of the present invention, multiple groups of mounting holes are arranged along the length direction of the lateral loading rocker arm and the longitudinal loading rocker arm, and the mounting position with the first bearing seat can be adjusted to adjust the amplitude of the harmonic motion of the loading profile.

[0026] To solve the above technical problems, the present invention further provides a test method for simulating the loading of a mooring chain by a floating platform in a laboratory. Using the above test device, by adjusting the motion period of the lateral loading mechanism and the longitudinal loading mechanism and the motion distance of the lateral loading mechanism and the longitudinal loading mechanism, the loading profile can perform harmonic motions with the same period and the same amplitude, the same period but different amplitudes, different periods but the same amplitude, or different periods and different amplitudes in two dimensions.

[0027] The present invention has the following beneficial effects compared with the prior art:

[0028] The lateral loading mechanism can make the loading profile perform lateral simple harmonic motion, and the longitudinal loading mechanism can make the loading profile perform longitudinal simple harmonic motion. The lateral loading mechanism can absorb the longitudinal simple harmonic motion of the loading profile, and the longitudinal loading mechanism can absorb the lateral simple harmonic motion of the loading profile. The motions in two dimensions can be coupled only on the loading profile, achieving the simultaneous simulation of the loading process of the mooring chain by the floating platform in two dimensions, and the coupling effect between motions in different dimensions can be studied. Brief Description of the Drawings

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only exemplary, and for those of ordinary skill in the art, without creative efforts, other implementation drawings can also be obtained according to the provided drawings.

[0030] Figure 1 It is a schematic diagram of the overall structure of the test device in the present invention;

[0031] Figure 2 It is Figure 1 A schematic diagram of the structure after hiding the electrodes, the speed reducer and the loading rocker arm;

[0032] Figure 3 It is Figure 2 A schematic diagram of the structure after hiding the profile frame;

[0033] Figure 4 It is a connection schematic diagram of the loading profile, the longitudinal absorption slider and the lateral absorption slider;

[0034] Figure 5 It is a schematic diagram of the structure of the motor, the speed reducer and the lateral loading rocker arm;

[0035] Figure 6 It is a schematic diagram of the structure of the lateral loading rocker arm;

[0036] Figure 7 It is a schematic diagram of the structure of the longitudinal absorption slider and the rotational connection structure.

[0037] The reference numerals in the figures are respectively represented as follows:

[0038] 1 - Loading profile;

[0039] 2 - Lateral loading mechanism;

[0040] 201 - Longitudinal displacement absorption mechanism, 2011 - Longitudinal absorption slider, 2012 - Longitudinal absorption guide rail;

[0041] 202 - Lateral displacement application mechanism, 2021 - Lateral positioning guide rail, 2022 - Lateral positioning slider, 2023 - First adapter plate, 2024 - Lateral displacement guide rail, 2025 - Lateral displacement slider, 2026 - Lateral loading rocker arm, 2027 - First connecting profile, 2028 - First bearing block, 2029 - Second bearing block, 2030 - Mounting hole;

[0042] 3 - Longitudinal loading mechanism;

[0043] 301 - Lateral displacement absorption mechanism, 3011 - Lateral absorption slider, 3012 - Lateral absorption guide rail;

[0044] 302 - Longitudinal displacement application mechanism, 3021 - Longitudinal positioning guide rail, 3022 - Longitudinal positioning slider, 3023 - Second adapter plate, 3024 - Longitudinal displacement guide rail, 3025 - Longitudinal displacement slider, 3026 - Longitudinal loading rocker arm, 3027 - Second connecting profile;

[0045] 4 - Profile frame. Detailed implementation mode

[0046] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0047] The present invention specifically provides a test device for simulating the loading of a mooring chain by a floating platform in a laboratory, including:

[0048] Loading profile 1 and lateral loading mechanism 2 and longitudinal loading mechanism 3 oppositely arranged on both sides of loading profile 1;

[0049] The lateral loading mechanism 2 can make the loading profile 1 perform a lateral simple harmonic motion, the longitudinal loading mechanism 3 can make the loading profile 1 perform a longitudinal simple harmonic motion, the lateral loading mechanism 2 can absorb the longitudinal simple harmonic motion of the loading profile 1, and the longitudinal loading mechanism 3 can absorb the lateral simple harmonic motion of the loading profile 1.

[0050] That is, there is only a lateral motion connection relationship between the lateral loading mechanism 2 and the loading profile 1. The loading profile 1 and the lateral loading mechanism 2 can move relatively freely longitudinally, and the longitudinal harmonic motion of the loading profile 1 cannot be synchronously transmitted to the lateral loading mechanism 2. There is only a longitudinal motion connection relationship between the longitudinal loading mechanism 3 and the loading profile 1. The loading profile 1 and the longitudinal loading mechanism 3 can move relatively freely laterally, and the lateral harmonic motion of the loading profile 1 cannot be synchronously transmitted to the longitudinal loading mechanism 3. This enables the motions in two dimensions to be coupled only on the loading profile 1, achieving the simultaneous simulation of the loading process of the mooring chain by the floating platform in two dimensions, and the coupling effect between motions in different dimensions can be studied.

[0051] Although the lateral harmonic motion and the longitudinal harmonic motion are coupled on the loading profile 1, due to the independent characteristics of the lateral loading mechanism 2 and the longitudinal loading mechanism 3, there is no mutual interference. Therefore, the motion periods of both the lateral loading mechanism 2 and the longitudinal loading mechanism 3 can be freely adjusted to achieve the harmonic motion of the loading profile 1 with the same or different periods in two dimensions.

[0052] For example, the lateral loading mechanism 2 makes the lateral harmonic motion of the loading profile 1 have a period of 5 seconds, while the longitudinal loading mechanism 3 can make the longitudinal harmonic motion of the loading profile 1 have a period of 8 seconds.

[0053] For the same reason, the motion distances of both the lateral loading mechanism 2 and the longitudinal loading mechanism 3 can be adjusted to achieve the harmonic motion of the loading profile 1 with the same or different amplitudes in two dimensions.

[0054] For example, the lateral loading mechanism 2 makes the amplitude of the lateral harmonic motion of the loading profile 1 be 50 mm, while the longitudinal loading mechanism 3 can make the amplitude of the longitudinal harmonic motion of the loading profile 1 be 20 mm.

[0055] Furthermore, the composition of the above-mentioned lateral loading mechanism 2 is as follows:

[0056] The lateral loading mechanism 2 includes a longitudinal displacement absorption mechanism 201 installed on the loading profile 1 for absorbing the longitudinal harmonic motion of the loading profile 1;

[0057] On the side of the longitudinal displacement absorption mechanism 201 away from the loading profile 1, there is a lateral displacement application mechanism 202 connected, which is used to apply a reciprocating lateral pushing and pulling force to the loading profile 1 to make the loading profile 1 perform lateral harmonic motion;

[0058] The longitudinal displacement absorption mechanism 201 enables the loading profile 1 and the lateral displacement application mechanism 202 to move relatively freely longitudinally on the one hand, and can synchronize the lateral displacement applied by the lateral displacement application mechanism 202 to the loading profile 1 on the other hand.

[0059] Furthermore, the longitudinal loading mechanism 3 is configured as follows:

[0060] The longitudinal loading mechanism 3 includes a lateral displacement absorption mechanism 301 mounted on the loading profile 1 for absorbing the lateral harmonic motion of the loading profile 1.

[0061] On the side of the lateral displacement absorption mechanism 301 away from the loading profile 1, a longitudinal displacement application mechanism 302 is connected for applying a reciprocating longitudinal pushing and pulling force to the loading profile 1 to cause the loading profile 1 to perform longitudinal harmonic motion.

[0062] On the one hand, the lateral displacement absorption mechanism 301 enables the loading profile 1 to move laterally relatively freely with respect to the longitudinal displacement application mechanism 302, and on the other hand, it can synchronize the longitudinal displacement applied by the longitudinal displacement application mechanism 302 to the loading profile 1.

[0063] Furthermore, the longitudinal displacement absorption mechanism 201 is configured as follows:

[0064] The longitudinal displacement absorption mechanism 201 includes a longitudinal absorption slider 2011 fixedly mounted on the loading profile 1 and a longitudinal absorption guide rail 2012 slidably connected to the longitudinal absorption slider 2011. The lateral displacement application mechanism 202 is connected to the longitudinal absorption guide rail 2012.

[0065] That is, the cooperation between the longitudinal absorption slider 2011 and the longitudinal absorption guide rail 2012 can absorb the longitudinal displacement between the lateral displacement application mechanism 202 and the loading profile 1, and only the lateral displacement can be transmitted between the lateral displacement application mechanism 202 and the loading profile 1 to facilitate the lateral harmonic motion of the loading profile 1.

[0066] Furthermore, the lateral displacement absorption mechanism 301 is configured as follows:

[0067] The lateral displacement absorption mechanism 301 includes a lateral absorption slider 3011 fixedly mounted on the loading profile 1 and a lateral absorption guide rail 3012 slidably connected to the lateral absorption slider 3011. The longitudinal displacement application mechanism 302 is connected to the lateral absorption guide rail 3012.

[0068] That is, the cooperation between the lateral absorption slider 3011 and the lateral absorption guide rail 3012 can absorb the lateral displacement between the longitudinal displacement application mechanism 302 and the loading profile 1, and only the longitudinal displacement can be transmitted between the longitudinal displacement application mechanism 302 and the loading profile 1 to facilitate the longitudinal harmonic motion of the loading profile 1.

[0069] It can be understood that the above-mentioned way of the slider cooperating with the guide rail to achieve displacement absorption can be replaced by the way of the slider cooperating with the chute, or can be replaced by the form of a telescopic rod. For example, one end of a longitudinal telescopic rod is connected to the loading profile 1, and the other end is connected to the transverse displacement applying mechanism 202, or it can also enable the loading profile 1 and the transverse displacement applying mechanism 202 to move longitudinally relative to each other freely. Similarly, between the loading profile 1 and the longitudinal displacement applying mechanism 302, a transverse telescopic rod can be provided.

[0070] Furthermore, the composition of the above-mentioned transverse displacement applying mechanism 202 is as follows:

[0071] The transverse displacement applying mechanism 202 includes a transverse positioning guide rail 2021 fixedly installed on the profile frame 4, a transverse positioning slider 2022 slidably connected to the transverse positioning guide rail 2021, a longitudinally arranged transverse displacement guide rail 2024 fixedly connected to the transverse positioning slider 2022 through a first adapter plate 2023, a transverse displacement slider 2025 slidably connected to the transverse displacement guide rail 2024, and a transverse loading rocker arm 2026 rotatably connected to the transverse displacement slider 2025;

[0072] Among them, the longitudinal absorption guide rail 2012 is fixedly connected to the first adapter plate 2023 through a first connecting profile 2027, so that the transverse displacement slider 2025, the transverse displacement guide rail 2024, the adapter plate, the transverse positioning slider 2022, the longitudinal displacement absorption mechanism 201 and the loading profile 1 can move synchronously along the transverse positioning guide rail 2021 to conduct the transverse displacement to the longitudinal absorption guide rail 2012 and the loading profile 1, so that the loading profile 1 performs a transverse harmonic motion;

[0073] The cooperation of each guide rail and each slider between the loading profile 1 and the transverse loading rocker arm 2026 can convert the circumferential rotation of the transverse loading rocker arm 2026 in the plane into the transverse harmonic motion of the loading profile 1.

[0074] It can be understood that the transverse displacement applying mechanism 202 can also be directly replaced by a transverse telescopic rod, and the movable end of the transverse telescopic rod is fixedly connected to the longitudinal absorption guide rail 2012, and the loading profile 1 performs a transverse harmonic motion through the reciprocating telescoping of the telescopic rod.

[0075] Furthermore, the composition of the above-mentioned longitudinal displacement applying mechanism 302 is as follows:

[0076] The longitudinal displacement applying mechanism 302 includes a longitudinal positioning guide rail 3021 fixedly installed on the profile frame 4, a longitudinal positioning slider 3022 slidably connected to the longitudinal positioning guide rail 3021, a horizontally arranged longitudinal displacement guide rail 3024 fixedly connected to the longitudinal positioning slider 3022 through a second adapter plate 3023, a longitudinal displacement slider 3025 slidably connected to the longitudinal displacement guide rail 3024, and a longitudinal loading rocker arm 3026 rotatably connected to the longitudinal displacement slider 3025;

[0077] Among them, the lateral absorption guide rail 3012 is fixedly connected to the second adapter plate 3023 through a second connecting profile 3027, so that the longitudinal displacement slider 3025, the longitudinal displacement guide rail 3024, the adapter plate, the longitudinal positioning slider 3022, the lateral displacement absorption mechanism 301, and the loading profile 1 can move synchronously along the longitudinal positioning guide rail 3021 to conduct the longitudinal displacement to the lateral absorption guide rail and the loading profile 1, causing the loading profile 1 to perform longitudinal harmonic motion;

[0078] The cooperation of each guide rail and each slider between the loading profile 1 and the longitudinal loading rocker arm 3026 can convert the circumferential rotation of the longitudinal loading rocker arm 3026 in the plane into the longitudinal harmonic motion of the loading profile 1.

[0079] It can be understood that the longitudinal displacement applying mechanism 302 can also be directly replaced by a longitudinal telescopic rod. The movable end of the longitudinal telescopic rod is fixedly connected to the lateral absorption guide rail 3012, and the reciprocating telescopic motion of the telescopic rod causes the loading profile 1 to perform longitudinal harmonic motion.

[0080] In addition, it should be noted that if the scheme of using the loading rocker arm is adopted, the rotational connection mode between the lateral loading rocker arm 2026 and the lateral displacement slider 2025 is the same as that between the longitudinal loading rocker arm 3026 and the longitudinal displacement slider 3025. Taking the lateral loading rocker arm 2026 as an example, the specific connection mode is as follows:

[0081] The lateral loading rocker arm 2026 is fixedly connected to the first bearing seat 2028, the lateral displacement slider 2025 is fixedly connected to the second bearing seat 2029, and the first bearing seat 2028 is rotatably connected to the second bearing seat 2029.

[0082] Furthermore, a plurality of groups of mounting holes 2030 are arranged along the length direction of the lateral loading rocker arm 2026 and the longitudinal loading rocker arm 3026, which can adjust the mounting position with the first bearing seat 2028 to adjust the amplitude of the harmonic motion of the loading profile 1.

[0083] The lateral loading rocker arm 2026 and the longitudinal loading rocker arm 3026 are driven to rotate by a motor and a reducer.

[0084] In addition, it should be noted that although the longitudinal telescopic rod can be used to replace the longitudinal displacement applying mechanism 302, and the transverse telescopic rod can be used to replace the transverse displacement applying mechanism 202. However, since the simple harmonic motion is not a uniform motion and the speed magnitude is constantly changing, directly using the telescopic rod will involve the problem of changing telescopic speed. Through the cooperation of the motor, reducer and loading rocker arm in the present invention, the motor only needs to rotate at a constant speed, which is easier to control on the one hand and can make the recording of the simple harmonic motion more accurate on the other hand.

[0085] The present invention further provides a test method for simulating the loading of a mooring chain by a floating platform in a laboratory. Using the above test device, by adjusting the motion period of the transverse loading mechanism 2 and the longitudinal loading mechanism 3 and the motion distance of the transverse loading mechanism 2 and the longitudinal loading mechanism 3, the loading profile 1 can perform simple harmonic motions with the same period and the same amplitude, simple harmonic motions with the same period but different amplitudes, simple harmonic motions with different periods but the same amplitude, or simple harmonic motions with different periods and different amplitudes in two dimensions.

[0086] The above embodiments are only exemplary embodiments of the present application and are not used to limit the present application. The protection scope of the present application is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements within the essence and protection scope of the present application, and such modifications or equivalent replacements should also be regarded as falling within the protection scope of the present application.

Claims

1. A test device for simulating the loading of a floating platform on a mooring chain in a laboratory, characterized in that: include: A loading profile (1) and a transverse loading mechanism (2) and a longitudinal loading mechanism (3) arranged on two sides of the loading profile (1); The transverse loading mechanism (2) can cause the loading profile (1) to perform transverse simple harmonic motion, and the longitudinal loading mechanism (3) can cause the loading profile (1) to perform longitudinal simple harmonic motion. The transverse loading mechanism (2) can absorb the longitudinal simple harmonic motion of the loading profile (1), and the longitudinal loading mechanism (3) can absorb the transverse simple harmonic motion of the loading profile (1), so that the motion in two dimensions can be coupled on the loading profile (1).

2. A test device for simulating the loading of a floating platform on a mooring chain in a laboratory according to claim 1, characterized in that: The transverse loading mechanism (2) comprises a longitudinal displacement absorbing mechanism (201) installed on the loading profile (1) and used for absorbing the longitudinal simple harmonic motion of the loading profile (1); A lateral displacement applying mechanism (202) is connected to the side of the longitudinal displacement absorbing mechanism (201) away from the loading profile (1), and is used to apply a reciprocating lateral push-pull force to the loading profile (1), so that the loading profile (1) performs lateral simple harmonic motion; The longitudinal loading mechanism (3) comprises a transverse displacement absorbing mechanism (301) installed on the loading profile (1) and used for absorbing the transverse simple harmonic motion of the loading profile (1); A longitudinal displacement applying mechanism (302) is connected to the side of the lateral displacement absorbing mechanism (301) away from the loading profile (1) and is used to apply a reciprocating longitudinal push-pull force to the loading profile (1) so that the loading profile (1) performs longitudinal simple harmonic motion.

3. A test device for simulating the loading of a mooring chain by a floating platform in a laboratory according to claim 2, characterized in that: The longitudinal displacement absorbing mechanism (201) comprises a longitudinal absorbing slider (2011) fixedly mounted on the loading profile (1) and a longitudinal absorbing guide rail (2012) slidably connected to the longitudinal absorbing slider (2011), and the transverse displacement applying mechanism (202) is connected to the longitudinal absorbing guide rail (2012); The transverse displacement absorbing mechanism (301) comprises a transverse absorbing slider (3011) fixedly mounted on the loading profile (1) and a transverse absorbing guide rail (3012) slidably connected to the transverse absorbing slider (3011), and the longitudinal displacement applying mechanism (302) is connected to the transverse absorbing guide rail (3012).

4. A test device for simulating the loading of a mooring chain by a floating platform in a laboratory according to claim 3, characterized in that: The lateral displacement applying mechanism (202) comprises a lateral positioning guide rail (2021) fixedly mounted on the profile frame (4), a lateral positioning slider (2022) slidably connected to the lateral positioning guide rail (2021), a longitudinally arranged lateral displacement guide rail (2024) fixedly connected to the lateral positioning slider (2022) via a first adapter plate (2023), a lateral displacement slider (2025) slidably connected to the lateral displacement guide rail (2024), and a lateral loading rocker arm (2026) rotatably connected to the lateral displacement slider (2025); The longitudinal absorbing guide rail (2012) is fixedly connected to the first adapter plate (2023) via a first connecting profile (2027) so as to transmit lateral displacement to the longitudinal absorbing guide rail (2012) and the loading profile (1); The guide rails and the sliders between the loading profile (1) and the transverse loading rocker arm (2026) cooperate to convert the circumferential rotation of the transverse loading rocker arm (2026) within a plane into the transverse simple harmonic motion of the loading profile (1).

5. A test device for simulating the loading of a mooring chain by a floating platform in a laboratory according to claim 4, characterized in that: The longitudinal displacement applying mechanism (302) comprises a longitudinal positioning guide rail (3021) fixedly mounted on the profile frame (4), a longitudinal positioning slider (3022) slidably connected to the longitudinal positioning guide rail (3021), a transversely arranged longitudinal displacement guide rail (3024) fixedly connected to the longitudinal positioning slider (3022) via a second adapter plate (3023), a longitudinal displacement slider (3025) slidably connected to the longitudinal displacement guide rail (3024), and a longitudinal loading rocker arm (3026) rotatably connected to the longitudinal displacement slider (3025); The transverse absorbing guide rail (3012) is fixedly connected to the second adapter plate (3023) via a second connecting profile (3027) so as to transmit the transverse displacement to the transverse absorbing guide rail (3012) and the loading profile (1); The guide rails and the sliders between the loading profile (1) and the longitudinal loading rocker arm (3026) cooperate to convert the circumferential rotation of the longitudinal loading rocker arm (3026) in a plane into the longitudinal simple harmonic motion of the loading profile (1).

6. A test device for simulating the loading of a floating platform on a mooring chain in a laboratory according to claim 5, characterized in that: The rotational connection mode of the transverse loading rocker arm (2026) and the transverse displacement slider (2025) is the same as the rotational connection mode of the longitudinal loading rocker arm (3026) and the longitudinal displacement slider (3025); The transverse loading rocker arm (2026) is fixedly connected to the first bearing seat (2028), the transverse displacement slider (2025) is fixedly connected to the second bearing seat (2029), and the first bearing seat (2028) is rotatably connected to the second bearing seat (2029).

7. A test device for simulating the loading of a floating platform on a mooring chain in a laboratory according to claim 6, characterized in that: The transverse loading rocker arm (2026) and the longitudinal loading rocker arm (3026) are both provided with a plurality of mounting holes (2030) along their length direction, and the mounting position with respect to the first bearing seat (2028) can be adjusted to adjust the amplitude of the simple harmonic motion of the loading profile (1).

8. A test method for simulating the loading of a mooring chain by a floating platform in a laboratory, characterized in that: By using the test device described in claim 1 and adjusting the movement period of the transverse loading mechanism (2) and the longitudinal loading mechanism (3) and the movement distance of the transverse loading mechanism (2) and the longitudinal loading mechanism (3), the loaded profile (1) can be made to perform simple harmonic motion with the same period and barrel amplitude, simple harmonic motion with the same period but different amplitudes, simple harmonic motion with different periods but the same amplitude, or simple harmonic motion with different periods and different amplitudes in two dimensions.

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