An ice-breaking test device

Abstract

The present invention proposes an icebreaking test device, which belongs to the field of icebreaking. It solves the problem that there is currently no formed test equipment for the amplitude and frequency of killer whale tail swings and it is difficult to determine the optimal icebreaking parameters. It includes a water tank, in which water is set, and the layer ice model floats on the water and is connected to the water tank at both ends; an immersion depth control device is set in the water tank, the killer whale bionic model is connected to the active end of the immersion depth control device, the immersion depth control device is used to control the depth of the killer whale bionic model, and the killer whale bionic model is used to swing to create waves; a speed flow monitoring component is used to monitor the flow field speed change; a displacement measurement system is used to monitor the displacement of the layer ice model; a controller, the killer whale bionic model, the immersion depth control device, the displacement measurement system and the speed flow monitoring component are all electrically connected to the controller. It is mainly used for icebreaking tests.

Description

Technical Field

[0001] The present invention belongs to the technical field of icebreaking, and particularly relates to an icebreaking test device. Background Art

[0002] Recently, the rising global temperature has led to the rapid melting of ice and snow in the Arctic region. Against the backdrop of the continuous deepening of economic globalization and regional integration, the international community has widely focused on the increasingly prominent values of the Arctic in aspects such as strategy, economy, scientific research, environmental protection, waterways, and resources. In the process of reasonably developing and utilizing Arctic resources, countries have invested a large amount of research in improving the icebreaking ability and efficiency in the field of ships and ocean engineering.

[0003] Currently, icebreaking methods can be divided into "contact icebreaking" and "non-contact icebreaking". The former is commonly seen in icebreakers, where the icebreaker directly collides with the layer ice, causing the layer ice to break and shatter. However, there is a risk of damage to the hull during the ship-ice collision. Therefore, researchers have proposed the "non-contact icebreaking" method. The "non-contact icebreaking" method is a new icebreaking method, and the "wave-making icebreaking method" is one of them. By applying a moving load to the layer ice, when the speed of the load movement is equal to the critical speed of the wave-making of the layer ice, the layer ice will resonate, resulting in large deformation and even fracture. However, as the thickness of the layer ice increases, the critical speed will also increase accordingly, making it difficult for current underwater vehicles to reach the critical speed. The present invention draws inspiration from nature. Killer whales swim under the layer ice, and the waves raised by their tails break the layer ice to prey on seals on the layer ice.

[0004] In order to study the relationship between the amplitude and frequency of the killer whale's tail swing and wave-making icebreaking, a special test device is needed: on the one hand, it can complete the simulation of the killer whale's tail swing model, and on the other hand, it is necessary to monitor the ice surface deformation and the change of the flow field. Summary of the Invention

[0005] In view of this, the present invention aims to propose an icebreaking test device to solve the problems that there is currently no formed test equipment for the amplitude and frequency of the whale's tail swing and it is difficult to determine the optimal icebreaking parameters.

[0006] To achieve the above object, the present invention adopts the following technical solutions: An icebreaking test device, comprising:

[0007] A water tank, in which water is provided, and an ice layer model floats on the water and is connected to both ends of the water tank;

[0008] A submergence depth control device, arranged in the water tank, and a killer whale bionic model is connected to the movable end of the submergence depth control device. The submergence depth control device is used to control the depth of the killer whale bionic model, and the killer whale bionic model is used to swing to generate waves;

[0009] A velocity flow monitoring component, used to monitor the flow field velocity;

[0010] A displacement measurement system for monitoring the displacement of an ice layer model;

[0011] A controller, an orca bionic model, a submergence depth control device, a displacement measurement system, and a velocity flow monitoring component are all electrically connected to the controller.

[0012] Furthermore, the water tank is a vertical circulation water tank.

[0013] Furthermore, the water tank includes a transparent pool wall and a connecting member, and both ends of the ice layer model are pivotally connected to the transparent pool wall through the connecting member respectively.

[0014] Furthermore, the velocity flow monitoring component includes a PIV laser, a camera, and fluorescent particles. The fluorescent particles are dispersed in the water in the water tank. The PIV laser is used to illuminate the fluorescent particles, and the camera is used to photograph the movement of the fluorescent particles.

[0015] Furthermore, a uniform incoming flow is provided in the water tank.

[0016] Furthermore, the orca bionic model includes a swinging part, a connecting rod, a motor, and a three-dimensional force sensor. The fixed end of the motor is connected to the movable end of the submergence depth control device. The rotating end of the motor is connected to the connecting rod. The connecting rod is connected to the three-dimensional force sensor, and the three-dimensional force sensor is connected to the swinging part.

[0017] Furthermore, the swinging part includes a rigid cylinder and a flexible plate. The rigid cylinder is hollow, the three-dimensional force sensor is inserted into the rigid cylinder, and the rigid cylinder is connected to the flexible plate.

[0018] Furthermore, the rigid cylinder is arranged coaxially with the motor.

[0019] Furthermore, the submergence depth control device includes a slide rail, a slider, and a linear drive component. The slide rail is arranged in the water tank. The slider is slidably connected to the slide rail. The slider is connected to the fixed end of the motor, and the linear drive component is connected to the slider for driving the slider to move on the slide rail.

[0020] Furthermore, the linear drive component is a cylinder.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. By laying an ice layer model in a vertical water tank, this test device can simulate the scenario of an orca moving underwater;

[0023] 2. This test device can generate waves by setting up an orca bionic model, which can provide different amplitudes and frequencies. Through the measurement and recording of multiple physical fields, it can achieve the purpose of breaking thick-layer ice even at speeds lower than the critical speed requirement.

[0024] 3. This test device can facilitate the observation of the dynamic flow field by setting up fluorescent particles. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings forming a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof of the present invention are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0026] Figure 1 is the structural schematic diagram of the present invention including the water tank pool wall;

[0027] Figure 2 is the structural schematic diagram of the present invention with half of the water tank pool wall removed;

[0028] Figure 3 is the structural sectional view of the orca bionic model described in the present invention;

[0029] Figure 4 is the structural schematic diagram of the immersion depth control device described in the present invention;

[0030] Figure 5 is the relative position diagram of the water tank and the layer ice model described in the present invention;

[0031] Figure 6 is the measurement process demonstration diagram of the present invention.

[0032] Water tank 1; transparent pool wall 1.1; connecting piece 1.2; layer ice model 2; orca bionic model 3; rigid cylinder 3.1; flexible plate 3.2; connecting rod 3.3; motor 3.4; three-dimensional force sensor 3.5; connecting piece 3.6; immersion depth control device 4; slide rail 4.1; slider 4.2; PIV laser 5; camera 6; displacement measurement system 7; controller 8. DETAILED DESCRIPTION OF THE INVENTION

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. It should be noted that, without conflict, the embodiments and features in the embodiments of the present invention can be combined with each other. The described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0034] It should be noted that the descriptions of directions such as "left", "right", "left side", "right side", "upper part", "lower part", "top", and "bottom" in the present invention are all defined based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the described structure must be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In the description of the present invention, "a plurality of" means more than two, unless otherwise specifically defined.

[0035] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] Referring to the accompanying drawings to illustrate this embodiment, an ice-breaking test device includes:

[0037] A water tank 1, in which water is provided, and an ice layer model 2 floats on the water and one end is connected to the water tank 1; in order to simulate the two-dimensional problem of the movement of orcas under the ice layer, the width direction of the ice layer model 2 is not restricted, only the displacement in the length direction of the ice layer model 2 is restricted, but the rotational freedom degree of the ice layer model 2 is still free.

[0038] A submersion depth control device 4, arranged in the water tank 1, and an orca biomimetic model 3 is connected to the movable end of the submersion depth control device 4. The submersion depth control device 4 is used to control the depth of the orca biomimetic model 3, and the orca biomimetic model 3 is used to swing to generate waves.

[0039] A velocity flow monitoring component, used to monitor the flow field velocity.

[0040] A displacement measurement system 7, used to monitor the displacement of the ice layer model 2; the displacement measurement system 7 is a binocular displacement measurement system, specifically arranged above the water tank 1, and can clearly capture and record the deformation process of the ice layer model 2 to form a deformation cloud map of the ice layer model. The displacement measurement system can use existing technical equipment.

[0041] A controller 8, the orca biomimetic model 3, the submersion depth control device 4, the displacement measurement system 7, and the velocity flow monitoring component are all electrically connected to the controller 8.

[0042] In this embodiment, the water tank 1 is a vertical circulation water tank.

[0043] In this embodiment, the water tank 1 includes a transparent pool wall 1.1 and a connecting member 1.2. Both ends of the layer ice model 2 are pivotally connected to the transparent pool wall 1.1 through the connecting member 1.2. Specifically, the connecting member 1.2 is set as a hinge, and both ends of the layer ice model 2 are pivotally connected to the transparent pool wall 1.1 through the hinge, so that the layer ice model 2 can float as a whole while ensuring a certain degree of rotation. Selecting an inedible elastic material (such as an ABS plastic plate) for the layer ice model 2 can meet the usage requirements.

[0044] In this embodiment, the velocity flow monitoring assembly includes a PIV laser 5, a camera 6, and fluorescent particles. The fluorescent particles are dispersed in the water in the water tank 1. The PIV laser 5 is used to illuminate the fluorescent particles, and the camera 6 is used to capture the movement of the fluorescent particles. The PIV laser, the camera, and the fluorescent particles can all adopt existing technologies.

[0045] In this embodiment, a uniform incoming flow is provided in the water tank 1. It can simulate the ocean environment, so that the uniform incoming flow acts on the orca bionic model 3. The uniform incoming flow is Figure 6 shown by the medium-thick arrow.

[0046] In this embodiment, the orca bionic model 3 includes a swinging part, a connecting rod 3.3, a motor 3.4, and a three-dimensional force sensor 3.5. The fixed end of the motor 3.4 is connected to the movable end of the immersion depth control device 4, the rotating end of the motor 3.4 is connected to the connecting rod 3.3, the connecting rod 3.3 is connected to the three-dimensional force sensor 3.5 through a plurality of circumferentially evenly distributed connecting pieces 3.6, and the three-dimensional force sensor 3.5 is connected to the swinging part. The operation of the motor 3.4 can drive the connecting rod 3.3 to rotate, and the three-dimensional force sensor 3.5 can monitor the rotation parameters of the connecting rod 3.3 and the torque in each incoming flow direction.

[0047] In this embodiment, the swinging part includes a rigid cylinder 3.1 and a flexible plate 3.2. The rigid cylinder 3.1 is hollow, the three-dimensional force sensor 3.5 is inserted into the rigid cylinder 3.1, the three-dimensional force sensor 3.5 is connected to the rigid cylinder 3.1 through a plurality of circumferentially evenly distributed connecting pieces 3.6, and the rigid cylinder 3.1 is connected to the flexible plate 3.2. There is an opening in the middle of the three-dimensional force sensor 3.5, and the connecting rod 3.3 passes through the opening in the middle of the three-dimensional force sensor 3.5, which does not affect the normal use of the three-dimensional force sensor 3.5. The three-dimensional force sensor 3.5 can measure the force in the incoming flow direction (x-axis direction) and the direction perpendicular to the incoming flow direction (x-axis direction) and the torque in the z-axis direction. By controlling the rotation frequency and angle of the cylinder 3.1 through the controller 8 and replacing the elastic plates 3.2 with different lengths and different materials, the amplitude and frequency of the tail swing of the elastic plate 3.2 can be controlled, so as to obtain the optimal bionic ice-breaking method by obtaining suitable parameters.

[0048] In this embodiment, the rigid cylinder 3.1 and the motor 3.4 are coaxially arranged. The rotating end of the motor 3.4 can better drive the rigid cylinder 3.1, so that the rigid cylinder 3.1 drives the flexible plate 3.2 to swing reciprocally, thereby imitating the orca to generate waves.

[0049] In this embodiment, the immersion depth control device 4 includes a slide rail 4.1, a slider 4.2 and a linear drive assembly. The slide rail 4.1 is arranged in the water tank 1. The slider 4.2 is slidably connected to the slide rail 4.1. The slider 4.2 is connected to the fixed end of the motor 3.4. The linear drive assembly is connected to the slider 4.2 and is used to drive the slider 4.2 to move on the slide rail 4.1.

[0050] In this embodiment, the linear drive assembly is a cylinder. Other linear drive assemblies can also be used, such as a hydraulic cylinder or a ball screw structure, etc. Any linear drive assembly that can meet the underwater working conditions can be used in this device.

[0051] During use, the position of the orca bionic model 3 in the vertical direction can be adjusted through the linear drive assembly. When the motor 3.4 operates, it can drive the connecting rod 3.3 to rotate reciprocally. When the connecting rod 3.3 rotates, it will drive the rigid cylinder 3.1 to rotate reciprocally. The rigid cylinder 3.1 will drive the connecting piece 3.6 to rotate reciprocally, thereby generating waves. By adjusting the physical parameters of the connecting piece 3.6 and the operating parameters of the motor 3.4, different waves can be formed. Different parameter waves can better simulate the motion parameters of the orca during icebreaking, thereby providing more reliable physical parameters for icebreaking. During the process of generating waves, a uniform oncoming flow is provided, which can simulate a more real marine environment and the dynamic swimming process of the orca. At the same time, fluorescent particles are provided in the water, irradiated by the PIV laser 5 and then synchronously photographed by the camera 6, and finally the velocity cloud map of the flow field is obtained. Thus, a set of tests is completed. After that, according to the test outline, the measurement of parameters such as the oncoming flow velocity, the immersion depth of the orca bionic device, and the amplitude and frequency of the tail swing of the orca bionic device is completed. By comparing the deformation degree of the underlying ice model 2 under different working conditions, the optimal bionic icebreaking method is obtained.

[0052] Sensors, controllers 8, control programs, etc. that may be involved in the above description are all prior arts and will not be elaborated here.

[0053] The embodiments of the present invention disclosed above are only used to help illustrate the present invention. The embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. According to the content of this specification, many modifications and variations can be made. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of the present invention, so that those skilled in the art can well understand and utilize the present invention.

Claims

1. An ice-breaking test device, characterized in that, Comprising: A water tank (1) with water provided therein, and an ice layer model (2) floating on the water with both ends connected to the water tank (1); A submersion depth control device (4) provided in the water tank (1), with an orca biomimetic model (3) connected to the movable end of the submersion depth control device (4). The submersion depth control device (4) is used to control the depth of the orca biomimetic model (3), and the orca biomimetic model (3) is used to swing to generate waves; A velocity flow monitoring component for monitoring the flow field velocity; A displacement measurement system (7) for monitoring the displacement of the ice layer model (2); A controller (8), to which the orca biomimetic model (3), the submersion depth control device (4), the displacement measurement system (7) and the velocity flow monitoring component are electrically connected. The orca biomimetic model (3) includes a swinging part, a connecting rod (3.3), a motor (3.4) and a three-dimensional force sensor (3.5). The fixed end of the motor (3.4) is connected to the movable end of the submersion depth control device (4), the rotating end of the motor (3.4) is connected to the connecting rod (3.3), the connecting rod (3.3) is connected to the three-dimensional force sensor (3.5), and the three-dimensional force sensor (3.5) is connected to the swinging part.

2. The ice-breaking test device according to claim 1, characterized in that: The water tank (1) is a vertical circulation water tank.

3. The ice-breaking test device according to claim 2, characterized in that: The water tank (1) includes a transparent pool wall (1.1) and a connecting member (1.2). Both ends of the ice layer model (2) are pivotally connected to the transparent pool wall (1.1) through the connecting member (1.2).

4. The ice-breaking test device according to claim 1, wherein: The velocity flow monitoring component includes a PIV laser (5), a camera (6) and fluorescent particles. The fluorescent particles are dispersed in the water in the water tank (1). The PIV laser (5) is used to illuminate the fluorescent particles, and the camera (6) is used to photograph the movement of the fluorescent particles.

5. An ice-breaking test device according to claim 1, characterized in that: A uniform oncoming flow is provided in the water tank (1).

6. The ice-breaking test device according to claim 1, characterized in that: The swinging part includes a rigid cylinder (3.1) and a flexible plate (3.2). The rigid cylinder (3.1) is hollow, the three-dimensional force sensor (3.5) is inserted into the rigid cylinder (3.1), and the rigid cylinder (3.1) is connected to the flexible plate (3.2).

7. An ice-breaking test device according to claim 6, characterized in that: The rigid cylinder (3.1) is coaxially arranged with the motor (3.4).

8. An ice-breaking test device according to claim 1, characterized in that: The submersion depth control device (4) includes a slide rail (4.1), a slider (4.2) and a linear drive assembly. The slide rail (4.1) is provided in the water tank (1), the slider (4.2) is slidably connected to the slide rail (4.1), the slider (4.2) is connected to the fixed end of the motor (3.4), and the linear drive assembly is connected to the slider (4.2) for driving the slider (4.2) to move on the slide rail (4.1).

9. The ice-breaking test device according to claim 8, wherein: The linear drive assembly is a cylinder.

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