Anchoring force testing device and method of simulating a floating platform

Abstract

The application discloses an anchoring force testing device and a method for simulating a floating platform by using the anchoring force testing device. The anchoring force testing device simulates the interaction relationship between the floating platform and the anchor through a loading device and a guide device, is used for anchoring performance testing of the anchor, and can more accurately test the performance parameters of the anchor and improve the design availability of the anchor. The method for simulating the floating platform by using the anchoring force testing device can simulate the situation that the floating platform is affected by waves and ocean currents and floats and exerts a pulling-out force on the ship anchor, including four situations of constant pulling force and constant pulling force direction, variable pulling force and constant pulling force direction, constant pulling force and variable pulling force direction, and variable pulling force and variable pulling force direction, and can accurately reflect the anchoring situation of the anchor when the anchor is affected by the floating platform.

Description

Technical Field

[0001] This invention relates to the field of testing equipment technology, specifically to an anchoring force testing device and a method for simulating a floating platform using the anchoring force testing device. Background Technology

[0002] When vessels are in operation, they need to use anchors to anchor and remain in designated sea areas or at designated depths. Anchors include gravity anchors, towed anchors, and special anchors. When anchoring, one end of the anchor is buried in the seabed, and the other end is connected to the floating body (vessel, offshore platform, etc.) via mooring lines. In real sea conditions, the floating body is affected by waves and ocean currents, resulting in horizontal and vertical movement, which transmits pull-out force to the anchor via the mooring lines. The pull-out force on the anchor is affected by multiple factors such as waves, ocean currents, gravity, and the dynamics of the floating body, manifesting as a force along the XYZ3 axes with irregular magnitude variations, constituting a multi-coupled nonlinear problem. Due to the limitations of physical conditions in real-world environments, only specific force conditions of the anchor can be simulated. The limitations of experimental environments necessitate a large design margin when designing anchors, hindering the design of anchors more suited to the usage conditions of floating platforms. Summary of the Invention

[0003] To improve the above-mentioned technical problems, the first aspect of the present invention provides an anchoring force test device that can simulate the pull-out force applied by a floating platform to a ship anchor, for simulating the force situation of a ship anchor underwater, including the changes in the direction and magnitude of the pull-out force.

[0004] An anchoring force testing device, hereinafter referred to as the testing device, provided by one technical solution of the present invention includes a water tank (1), a loading device (2), a guiding device (3), and a support frame (4). The water tank (1) includes a tank body (1-1) and a water outlet pipe (1-2); the water outlet pipe (1-2) is located on the tank body (1-1), which is a cylindrical structure with an open top and a sealed bottom; the tank body (1-1) has a space to accommodate the entire anchor and can store water and simulated seabed bottom medium; the water outlet pipe (1-2) is used to empty the tank body; the loading device (2) includes an electric push rod (2-1), an extension shaft (2-2), and an end ring (2-3); one end of the extension shaft (2-2) is connected to the electric push rod (2-1). -1) connected, suitable for telescopic movement relative to electric push rod (2-1), electric push rod (2-1) is used to drive the extension shaft (2-2) to move, and end ring (2-3) is set at the other end of extension shaft (2-2); guide device (3) includes two longitudinal guide rails (3-1, 3-2), transverse guide rail (3-3), hanging ring (3-4), two first moving slides (3-5) and second moving slide (3-6); electric push rod (2-1) is connected to support frame (4), two longitudinal guide rails (3-1, 3-2) are connected to support frame (4), and the two longitudinal guide rails (3-1, 3-2) are connected to support frame (4). 3-2) is connected to the support frame (4), and the height of the two longitudinal guide rails (3-1, 3-2) is higher than the height of the top opening of the water tank (1), and they are respectively located on both sides of the radial direction of the water tank (1). Each longitudinal guide rail is provided with a first movable slide (3-5). The first movable slide (3-5) is slidably connected to its corresponding longitudinal guide rail. The transverse guide rail (3-3) spans the two first movable slides (3-5). The second movable slide (3-6) is slidably connected to the transverse guide rail (3-3). The lifting ring (3-4) is connected to the second movable slide (3-6); the end ring (2-3) is used for one end of the cable, and the other end of the cable passes through the hanging lifting ring (3-4) and is used to connect to the anchor; the electric push rod (2-1) is used to provide the pulling force applied to the anchor, and the magnitude of the pulling force is adjusted by controlling the movement of the extension shaft (2-2); the first movable slide (3-5) and the second movable slide (3-6) are used to adjust the direction of the pulling force applied to the anchor by movement; a tension meter is provided on the cable to obtain the value of the pulling force.

[0005] In the above technical solution, the box (1-1) is made of fiberglass, and the outer wall of the box (1-1) is covered with a plastic film.

[0006] In the above technical solution, the electric push rod (2-1) includes a motor, a cylinder, a lead screw, and a push rod; the lead screw is located in the cylinder and is screwed to the output shaft of the motor, which is used to convert the rotational motion of the output shaft of the motor into linear motion. One end of the protruding shaft (2-2) is inserted into the cylinder and connected to the lead screw, and can perform telescopic motion relative to the cylinder.

[0007] In the above technical solution, the extension direction of the extension shaft (2-2) is perpendicular to the plane where the top opening of the housing (1-1) is located, so as to drive the extension shaft (2-2) to extend and retract in a direction perpendicular to the plane where the top opening of the housing (1-1) is located; the extension directions of the two longitudinal guide rails (3-1, 3-2) are both parallel to the plane where the top opening of the housing (1-1) is located; the extension direction of the transverse guide rail (3-3) is both parallel to the plane where the top opening of the housing (1-1) is located.

[0008] In the above technical solution, the support frame (4) includes four legs and a rectangular frame; one end of each of the four legs is connected to the four corners of the rectangular frame in a corresponding manner, so that the height of the rectangular frame is higher than the height of the top opening of the water tank (1); the electric push rod (2-1) is connected to one of the legs; and two longitudinal guide rails (3-1, 3-2) are respectively set on the two opposite sides of the rectangular frame.

[0009] In the above technical solution, the anchoring force testing device also includes: a controller and three driving devices; two of the three driving devices are respectively connected to two first movable slides (3-5) one-to-one, and the remaining one of the three driving devices is connected to the second movable slide (3-6). The driving devices are used to drive the connected movable slides to slide; the controller is connected to the electric push rod (2-1) and the three driving devices respectively, and is used to control the operation of the electric push rod (2-1) and the three driving devices.

[0010] Furthermore, limiters are provided at both ends of the two longitudinal guide rails (3-1, 3-2) and the transverse guide rail (3-3); each limiter is connected to the controller, and the limiter is used to send a stop signal to the controller when it comes into contact with the moving slide on the corresponding guide rail, so that the controller controls the corresponding drive device to stop working or output power in the opposite direction.

[0011] Furthermore, two of the three drive devices, which are respectively connected one-to-one with the two first moving slides (3-5), are configured to receive synchronous control from the controller.

[0012] The drive device is a motor or similar device. Preferably, the drive device is a variable frequency motor.

[0013] The second aspect of the present invention provides a method for simulating a floating platform using an anchoring force testing device, which is used to simulate the floating platform being affected by waves and ocean currents and applying a pull-out force to the anchor in order to test the performance of the anchor.

[0014] One technical solution of the present invention provides a method for simulating a floating platform using an anchoring force testing device, hereinafter referred to as a simulation method, which includes the following steps:

[0015] Step S1: Adjust the positional relationship between the extension shaft (2-2) and the electric push rod (2-1) so that the extension shaft (2-2) can extend and retract, and place the hanging ring (3-4) directly above the center of the water tank (1);

[0016] Step S2: Fill the box (1-1) with a simulated seabed medium, then bury the anchor in the medium, install the cable on the anchoring force test device and tie it to the anchor; place a tension meter on the cable to monitor the pull-out force and keep the cable in a relaxed state that is about to be taut; wherein, the tension meter obtains the pull-out force value in real time: fill the box (1-1) with water medium.

[0017] Step S3: Gradually control the extension shaft (2-2) to retract to tighten the cable and prepare to apply a pull-out force to the anchor;

[0018] Step S4: According to the instruction, control the guide device (3) to work to simulate the floating platform being stationary or moving, and control the extension shaft (2-2) to extend and retract during the simulation to change the magnitude of the pulling force until the anchor is pulled out;

[0019] Step S5, in response to the anchor being pulled out, the loading device (2) and the guiding device (3) are brought to a standstill.

[0020] In the above technical solution, step S4 includes:

[0021] For the case where the instruction is to simulate a floating platform being stationary and applying a constant force and a constant direction of pull-out force to the anchor, the value of the pull-out force is maintained at a predetermined value; wherein, when the detected pull-out force value is less than a fixed predetermined value, the extension shaft (2-2) is controlled to move away from the guide device (3), and when the detected pull-out force value is greater than a fixed predetermined value, the extension shaft (2-2) is controlled to move closer to the guide device (3);

[0022] For cases where the instruction is to simulate the movement of a floating platform and apply a pulling force with varying force and constant direction to the anchor, the extended shaft (2-2) is controlled to move closer to or further away from the guide device (3) to change the magnitude of the pulling force and keep the guide device (3) stationary so as to maintain the direction of the pulling force unchanged.

[0023] For cases where the instruction is to simulate the movement of a floating platform and apply a constant force and a pull force in a different direction to the anchor, the two first moving slides (3-5) and / or the second moving slide (3-6) are controlled to slide to change the position of the hanging ring (3-4) relative to the box (1-1); wherein, when the detected pull force value is less than a fixed predetermined value, the extension shaft (2-2) is controlled to move away from the guide device (3), and when the detected pull force value is greater than the fixed predetermined value, the extension shaft (2-2) is controlled to move closer to the guide device (3);

[0024] For cases where the instruction is to simulate the movement of a floating platform and apply a pulling force with varying force and direction to the anchor, the two first moving slides (3-5) and / or the second moving slide (3-6) are controlled to slide to change the position of the hanging ring (3-4) relative to the housing (1-1); wherein, when the detected pulling force value is less than the predetermined value of the variable force, the extension shaft (2-2) is controlled to move away from the guide device (3), and when the detected pulling force value is greater than the predetermined value of the variable force, the extension shaft (2-2) is controlled to move closer to the guide device (3); wherein, the predetermined value of the variable force is a predetermined value that changes linearly with time.

[0025] Among them, floating platforms are platform structures such as ships and buoys that can float on the water surface.

[0026] In summary, the anchoring force testing device and the method for simulating a floating platform using the anchoring force testing device provided by the present invention have at least the following beneficial effects:

[0027] (1) This invention simulates the floating platform being affected by waves and ocean currents and applying a pulling force to the anchor, which can test the anchoring force performance of the anchor, thereby improving the previous situation where anchoring force testing equipment could not simulate the stress situation of the ship.

[0028] (2) By setting up an anchoring force test device, the limitations of the test environment can be avoided, and the test process can be set as needed. It is not limited to simulating the static or dynamic state of the floating platform, but also has a variety of simulation methods, including changing the magnitude and direction of the applied pull-out force.

[0029] (3) The anchoring force testing device provided by the present invention is applicable to various ship anchors, has a wide range of applications, high utilization rate, and is more efficient, less costly and less labor-intensive than actual ship testing.

[0030] (4) The present invention uses an anchoring force testing device to simulate a floating platform, which can conduct simulation tests under multiple angles and different pull-out force magnitudes. It can accurately evaluate the performance of the anchor itself and help to discover anchor defects before actual use so as to optimize it.

[0031] (5) By setting a drive device to control the movement speed of the moving slide (including the first moving slide and the second moving slide), the movement mode of the floating platform in the wind and waves environment can be simulated. By controlling only the first moving slide or the second moving slide, the linear movement of the floating platform can be simulated. By controlling the first moving slide or the second moving slide at the same time, the turning movement of the floating platform can be simulated. In addition, by changing the movement speed of the moving slide, the movement of the floating platform in various working conditions or environments can be simulated. Attached Figure Description

[0032] Figure 1 This is a perspective view of the anchoring force testing device in one embodiment of the present invention;

[0033] Figure 2 This is a front view of the anchoring force testing device in one embodiment of the present invention;

[0034] Figure 3 This is a side view of an anchoring force testing device according to one embodiment of the present invention.

[0035] The following components are labeled in the figure: water tank (1), loading device (2), guiding device (3), support frame (4), box body (1-1), water outlet pipe (1-2), electric push rod (2-1), extension shaft (2-2), end ring (2-3), longitudinal guide rail (3-1, 3-2), transverse guide rail (3-3), hanging ring (3-4), first moving slide (3-5), second moving slide (3-6). Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0037] Some embodiments of the present invention provide an anchoring force testing apparatus. This apparatus is used for anchoring force testing, simulating a floating platform drifting in water, by applying a variable force and a variable direction of anchoring force to the anchor.

[0038] like Figures 1-3 As shown, the anchoring force testing device in this embodiment includes a water tank (1), a loading device (2), a guiding device (3), and a support frame (4). The water tank (1) is a cylinder with an open top, consisting of a tank body (1-1) and a water outlet pipe (1-2). The loading device (2) is an electric push rod, including an electric push rod (2-1), an extension shaft (2-2), and an end ring (2-3). The guiding device is a module consisting of three electric push rods and guide rails, including longitudinal guide rails (3-1) and (3-2), a transverse guide rail (3-3), a hanging ring (3-4), a moving slide of the longitudinal guide rail (3-5), and a moving slide of the transverse guide rail (3-6).

[0039] In some specific embodiments, the tank body (1-1) of the water tank (1) is a cylinder made of fiberglass. During installation, a cement base should be poured at the bottom of the water tank (1), and the outer wall of the tank body (1-1) should be covered with a plastic film to delay the aging of the fiberglass.

[0040] In some specific embodiments, the loading device (2) is fixed to the support frame (4) by welding.

[0041] In some specific embodiments, the extension shaft (2-2) and the end ring (2-3) of the loading device are connected by welding.

[0042] In some specific embodiments, the loading device (2) is an electric push rod, which controls the extension shaft (2-2) to extend and retract via a motor.

[0043] In some specific embodiments, the longitudinal guide rails (3-1) and (3-2) of the guide device (3) are connected to the support frame (4) by bolts.

[0044] In some specific embodiments, the longitudinal guide rails (3-1) and (3-2) of the guide device (3) need to be controlled synchronously without displacement deviation.

[0045] In some specific embodiments, the longitudinal guide rails (3-1), (3-2) and transverse guide rails (3-3) of the extension shaft (2-2) guide device (3) are all rotated by a motor-controlled pulley, and limiters are installed on the guide rails.

[0046] In some specific embodiments, the transverse guide rail (3-3) of the protruding shaft (2-2) is bolted to two movable slides (3-5) on both the longitudinal guide rails (3-1) and (3-2).

[0047] In some specific embodiments, the mounting ring (3-4) is bolted to a movable slide (3-6) on a transverse guide rail (3-3).

[0048] In some specific embodiments, the support frame (4) is installed on the cement base poured at the bottom of the water tank (1) by anchor bolts.

[0049] In some specific embodiments, the cable is laid out such that one end is tied to the end ring (2-3) of the loading device (2), passes through the hanging ring (3-4), and is tied downward to the end of the anchor, the form of which is not fixed.

[0050] In some specific embodiments, the water tank (1) is filled with a substrate medium that simulates the seabed. The type of substrate medium depends on the test content. The top of the substrate medium is filled with clean water, which is poured in from the top of the water tank (1). When not in use, the water is discharged from the outlet pipe (1-2). When in use, the outlet pipe (1-2) is closed.

[0051] Other embodiments of the present invention provide a method for simulating a floating platform using an anchoring force testing device, which simulates the floating platform being affected by waves and ocean currents and applying a pull-out force to the anchor through a loading device (2) and a guiding device (3). The method for simulating a floating platform is as follows:

[0052] a. Extend the output shaft (2-2) by half its length and place the hanging ring (3-4) directly above the center of the water tank (1);

[0053] b. Install the anchor and cable, and place a tension meter on the cable to monitor the tension. The cable should be in a relaxed state that is about to become taut.

[0054] c. Shorten the telescopic shaft (2-2), tighten the cable, and apply a pulling force to the anchor;

[0055] d. When the simulated floating platform is stationary and a constant force and a constant direction of pull-out force are applied to the anchor, the pull-out force value is maintained at a predetermined value. When the pull-out force value is less than the predetermined value, the telescopic shaft is shortened; when the pull-out force value is greater than the predetermined value, the telescopic shaft is extended.

[0056] e. When the simulated floating platform moves and applies a pull force with a variable force and a constant direction to the anchor, the magnitude of the pull force is changed by shortening and extending the telescopic shaft, without moving the guide device (3) to keep the direction of the pull force unchanged.

[0057] f. When the simulated floating platform moves and applies a constant force and a pull force in a different direction to the anchor, change the position of the longitudinal guide rails (3-1) and (3-2) and the transverse guide rail (3-3) of the guide device (3) to change the direction of the pull force. Since the cable is a rigid cable, when the position of the hanging ring (3-4) changes, the length of the cable changes accordingly, which will cause the pull force to change. The extension length of the telescopic shaft (2-2) will be changed accordingly. When the pull force value is less than the predetermined value, the telescopic shaft will be shortened. When the pull force value is greater than the predetermined value, the telescopic shaft will be extended.

[0058] g. When the simulated floating platform moves and applies a pulling force with varying force and direction to the anchor, the position of the longitudinal guide rails (3-1) and (3-2) and the transverse guide rail (3-3) of the guide device (3) is changed to change the direction of the pulling force. Since the cable is a rigid cable, when the position of the hanging ring (3-4) changes, the length of the cable changes accordingly, which will cause the pulling force to change. The extension length of the telescopic shaft (2-2) is changed accordingly. When the pulling force value is less than the predetermined value of the variable force, the telescopic shaft is shortened. When the pulling force value is greater than the predetermined value of the variable force, the telescopic shaft is extended.

[0059] h. Once the anchor is pulled out, promptly stop the loading device (2) and the guiding device (3).

[0060] It should be noted that steps d, e, f, and g can be combined or used individually according to the instructions.

[0061] In summary, the anchoring force testing device provided by this invention simulates the interaction between a floating platform and an anchor through a loading device (2) and a guiding device (3), and is used for anchoring performance testing. It can more accurately test the performance parameters of the anchor and improve the design usability of the anchor. The method of simulating a floating platform using the anchoring force testing device can simulate the floating platform being affected by waves and ocean currents and applying a pull-out force to the anchor, including four cases: constant pull-out force and constant pull-out force direction, variable pull-out force and constant pull-out force direction, constant pull-out force and variable pull-out force direction, and variable pull-out force and variable pull-out force direction. It can accurately reflect the anchoring situation of the anchor when it is affected by the floating platform.

[0062] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0063] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0064] Of course, the present invention may have other various embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and modifications according to the present invention, but these changes and modifications should all fall within the protection scope of the claims of the present invention.

Claims

1. A method for simulating a floating platform using an anchoring force testing device, characterized in that, An anchoring force testing device is used to measure the anchoring force of an anchor, including: a water tank (1), a loading device (2), a guiding device (3), and a support frame (4); The water tank (1) includes a tank body (1-1) and a water outlet pipe (1-2); the water outlet pipe (1-2) is located on the tank body (1-1), and the tank body (1-1) is a cylindrical structure with an open top and a sealed bottom; the tank body (1-1) has a space to accommodate the entire anchor and can store water medium and seabed bottom medium simulating the seabed, and the water outlet pipe (1-2) is used to drain the tank body; The loading device (2) includes an electric push rod (2-1), an extension shaft (2-2), and an end ring (2-3). One end of the extension shaft (2-2) is connected to the electric push rod (2-1) and is adapted to perform telescopic movement relative to the electric push rod (2-1). The electric push rod (2-1) is used to drive the extension shaft (2-2) to move. The end ring (2-3) is located at the other end of the extension shaft (2-2). The guiding device (3) includes two longitudinal guide rails (3-1, 3-2), a transverse guide rail (3-3), a hanging ring (3-4), two first movable slides (3-5) and a second movable slide (3-6); the electric push rod (2-1) is connected to the support frame (4), the two longitudinal guide rails (3-1, 3-2) are connected to the support frame (4), and the height of the two longitudinal guide rails (3-1, 3-2) is higher than the height of the top opening of the water tank (1), and they are respectively located on both sides of the radial direction of the water tank (1). Each longitudinal guide rail has a first movable slide (3-5), and the first movable slide (3-5) is slidably connected to its corresponding longitudinal guide rail. The transverse guide rail (3-3) spans the two first movable slides (3-5), the second movable slide (3-6) is slidably connected to the transverse guide rail (3-3), and the hanging ring (3-4) is connected to the second movable slide (3-6). The end ring (2-3) is used for one end of the cable, and the other end of the cable passes through the hanging ring (3-4) and is used to connect to the anchor; the electric push rod (2-1) is used to provide a pulling force applied to the anchor, and the magnitude of the pulling force is adjusted by controlling the movement of the extension shaft (2-2); the first moving slide (3-5) and the second moving slide (3-6) are used to adjust the direction of the pulling force applied to the anchor by moving; the cable is equipped with a tension meter to obtain the value of the pulling force; The method for simulating a floating platform using an anchoring force testing device includes the following steps: Step S1: Adjust the positional relationship between the extension shaft (2-2) and the electric push rod (2-1) so that the extension shaft (2-2) can extend and retract, and place the hanging ring (3-4) directly above the center of the water tank (1); Step S2: Fill the box (1-1) with a simulated seabed substrate, then bury the anchor in the substrate, install the cable on the anchoring force test device and tie it to the anchor; place a tension meter on the cable to monitor the pull-out force and keep the cable in a relaxed state that is about to be taut; wherein, the tension meter acquires the pull-out force value in real time; fill the box (1-1) with water. Step S3: Gradually control the extension shaft (2-2) to retract to tighten the cable and prepare to apply a pull-out force to the anchor; Step S4: According to the instruction, control the guide device (3) to work to simulate the floating platform being stationary or moving, and control the extension shaft (2-2) to extend and retract during the simulation to change the magnitude of the pulling force until the anchor is pulled out; Step S5, in response to the anchor being pulled out, the loading device (2) and the guiding device (3) are kept stationary; Step S4 includes: For the case where the instruction is to simulate a floating platform being stationary and applying a constant force and a constant direction of pull-out force to the anchor, the value of the pull-out force is maintained at a predetermined value; wherein, when the detected pull-out force value is less than a fixed predetermined value, the extension shaft (2-2) is controlled to move away from the guide device (3), and when the detected pull-out force value is greater than a fixed predetermined value, the extension shaft (2-2) is controlled to move closer to the guide device (3); For cases where the instruction is to simulate the movement of a floating platform and apply a pulling force with varying force and constant direction to the anchor, the extension shaft (2-2) is controlled to move closer to or further away from the guide device (3) to change the magnitude of the pulling force and keep the guide device (3) stationary so as to maintain the direction of the pulling force unchanged. For cases where the instruction is to simulate the movement of a floating platform and apply a constant force and a pull force in a different direction to the anchor, the two first moving slides (3-5) and / or the second moving slide (3-6) are controlled to slide to change the position of the hanging ring (3-4) relative to the box (1-1); wherein, when the detected pull force value is less than a fixed predetermined value, the extension shaft (2-2) is controlled to move away from the guide device (3), and when the detected pull force value is greater than the fixed predetermined value, the extension shaft (2-2) is controlled to move closer to the guide device (3); For cases where the instruction is to simulate the movement of a floating platform and apply a pulling force with varying force and direction to the anchor, the two first moving slides (3-5) and / or the second moving slide (3-6) are controlled to slide to change the position of the hanging ring (3-4) relative to the housing (1-1); wherein, when the detected pulling force value is less than the predetermined value of the variable force, the extension shaft (2-2) is controlled to move away from the guide device (3), and when the detected pulling force value is greater than the predetermined value of the variable force, the extension shaft (2-2) is controlled to move closer to the guide device (3); wherein, the predetermined value of the variable force is a predetermined value that changes linearly with time.

2. The method for simulating a floating platform using an anchoring force testing device according to claim 1, characterized in that, The box (1-1) is made of fiberglass, and the outer wall of the box (1-1) is covered with a plastic film.

3. The method for simulating a floating platform using an anchoring force testing device according to claim 1, characterized in that, The electric push rod (2-1) includes a motor, a cylinder, a lead screw, and a push rod; The lead screw is located inside the cylinder and is screwed to the output shaft of the motor. It is used to convert the rotational motion of the motor's output shaft into linear motion. One end of the extension shaft (2-2) passes through the cylinder and is connected to the lead screw, enabling it to extend and retract relative to the cylinder.

4. The method for simulating a floating platform using an anchoring force testing device according to claim 1, characterized in that, The extension direction of the extension shaft (2-2) is perpendicular to the plane where the top opening of the box (1-1) is located, so as to drive the extension shaft (2-2) to extend and retract in a direction perpendicular to the plane where the top opening of the box (1-1) is located; The two longitudinal guide rails (3-1, 3-2) extend in a direction parallel to the plane where the top opening of the box (1-1) is located; The extension direction of the transverse guide rail (3-3) is parallel to the plane where the top opening of the box (1-1) is located.

5. The method for simulating a floating platform using an anchoring force testing device according to claim 1, characterized in that, The support frame (4) includes four legs and a rectangular frame; one end of each of the four legs is connected to one of the four corners of the rectangular frame, so that the height of the rectangular frame is higher than the height of the top opening of the water tank (1). The electric push rod (2-1) is connected to one of the support legs; two longitudinal guide rails (3-1, 3-2) are respectively located on the two opposite sides of the rectangular frame.

6. The method for simulating a floating platform using an anchoring force testing device according to any one of claims 1 to 3, characterized in that, The anchoring force testing device also includes: a controller and three drive devices; Two of the three driving devices are respectively connected to the two first movable slides (3-5) in a one-to-one correspondence, and the remaining one of the three driving devices is connected to the second movable slide (3-6). The driving device is used to drive the connected movable slides to slide. The controller is connected to the electric push rod (2-1) and the three drive devices respectively, and is used to control the operation of the electric push rod (2-1) and the three drive devices.

7. The method for simulating a floating platform using an anchoring force testing device according to claim 6, characterized in that, Limiters are provided at both ends of the two longitudinal guide rails (3-1, 3-2) and the transverse guide rail (3-3); Each limit switch is connected to the controller. When the limit switch comes into contact with the moving slide on the corresponding guide rail, it sends a stop signal to the controller so that the controller controls the corresponding drive device to stop working or output power in the opposite direction.

8. The method for simulating a floating platform using an anchoring force testing device according to claim 6, characterized in that, Two of the three drive units, which are respectively connected one-to-one with the two first moving slides (3-5), are configured to receive synchronous control from the controller.

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