Water surface ice layer fixed boundary simulation test device

Abstract

The invention discloses a water surface ice layer fixed boundary simulation test device, and relates to the technical field of polar region ice breaking tests. The device comprises an external frame, a test water tank and a simulation test assembly. The simulation test assembly comprises a sliding adjustment support, a positioning pin and an ice fixing box. The ice fixing box is composed of a lower ice fixing box body, an upper ice fixing box body and side inserting plates, and a cavity for containing ice blocks can be defined by the lower ice fixing box body, the upper ice fixing box body and the side inserting plates. During testing, ice blocks are pushed in from the opening side of the lower ice fixing box and are fixed through the side insertion plate and the upper ice fixing box; vertical adjustment is achieved through cooperation of the sliding adjusting support and the positioning square pipe, horizontal adjustment is achieved through cooperation of the mounting arm and the adjusting notch, and the ice fixing box can be replaced to adapt to ice blocks of different sizes. The device solves the problems of difficult ice layer fixation, boundary simulation distortion and the like in the prior art, has the advantages of convenient installation, flexible adjustment and stable structure, and can improve the reliability and efficiency of test data.

Description

Technical Field

[0001] This invention relates to the field of polar icebreaking technology, and in particular to a simulation test device for a fixed boundary of water surface ice layer. Background Technology

[0002] With the continuous development of polar shipping and marine equipment activities, the motion and load problems of vehicles crossing ice layers have attracted increasing attention. In actual polar environments, sea ice often covers the water surface in the form of continuous ice sheets or large-area ice layers, with its upper surface exposed to air and its lower surface in contact with the water, forming a typical "water-ice-air" structure, which has a significant impact on the vehicle's cross-medium process. Model tests are an important means of studying the cross-medium icebreaking process, providing key support for revealing the underlying mechanisms and verifying numerical simulation methods. Therefore, accurately reproducing the real boundary conditions of ice cover is crucial.

[0003] Current experimental research in this area is relatively insufficient. Existing methods often involve placing individual ice blocks directly in water, with most of the ice submerged and floating. This results in boundary effects that differ significantly from reality, making it difficult to accurately reflect the ice breaking behavior. Existing devices used to simulate ice layers generally suffer from cumbersome installation, insufficient structural stability, and susceptibility to ice layer damage. Furthermore, they often fail to simultaneously meet the requirements for adjusting ice layer position and size, limiting their applicability. Therefore, it is necessary to develop a reliable device that can realistically simulate the fixed boundary of ice layers on the water surface to meet the practical needs of research on cross-medium ice breaking. Summary of the Invention

[0004] In view of this, the present invention provides a simulation test device for a fixed boundary of ice layer on a water surface.

[0005] Therefore, the present invention provides the following technical solution: A water surface ice layer fixed boundary simulation test device includes an outer frame, a test water tank, and a simulation test component; the outer frame is a cubic frame, and the test water tank is located inside the outer frame; a positioning square tube is vertically installed on the top of the outer frame above the test water tank; The simulation test assembly includes a cubic sliding adjustment bracket, a first positioning pin, and an ice-fixing box. The vertical section of the sliding adjustment bracket passes through a positioning square tube. The positioning square tube is provided with first pin holes evenly distributed along the vertical direction. The vertical section of the sliding adjustment bracket is provided with sliding adjustment bracket positioning holes evenly distributed along the vertical direction. The first positioning pin passes through the corresponding first pin hole and sliding adjustment bracket positioning hole. A mounting plate is fixedly installed on the inner edge of the bottom of the sliding adjustment bracket, and an adjustment slot is provided on the mounting plate; a mounting arm is horizontally installed on the outer wall of the ice box, and a fastening screw hole is provided at the end of the mounting arm away from the ice box. Fastening bolts are installed in the fastening screw hole and the adjustment slot to realize the detachable and fixed connection between the mounting arm and the mounting plate.

[0006] Furthermore, a limiting plate is installed at the top of the vertical section of the sliding adjustment bracket, and the horizontal surface area of ​​the limiting plate is larger than the horizontal profile area of ​​the positioning square tube.

[0007] Furthermore, the ice-fixing box includes a lower ice-fixing box and an upper ice-fixing box, both of which are square frame structures. An ice-supporting plate is fixed to the inner edge of the lower ice-fixing box, and an ice-pressing plate is fixed to the inner edge of the upper ice-fixing box. When the upper ice-fixing box is located inside the lower ice-fixing box, the outer wall of the upper ice-fixing box can fit against the inner wall of the lower ice-fixing box. The mounting arm is installed on the outer wall of the lower ice-fixing box.

[0008] Furthermore, a lower ice box connecting plate is installed on the outer side wall of the lower ice box, and an upper ice box connecting plate is installed on the outer side wall of the upper ice box at the position corresponding to the lower ice box connecting plate. The upper ice box connecting plate is installed on the lower ice box connecting plate by connecting bolts.

[0009] Furthermore, the lower ice box includes a lower ice box frame and a side plate. The lower ice box frame is a square frame structure with one open side. An ice plate is installed at the bottom of the lower ice box frame. An insertion plate positioning groove is opened on the ice plate corresponding to the open side of the lower ice box frame. Pin plates are provided at both ends of the open side of the lower ice box frame, and pin holes are opened on the pin plates. The bottom of the side plate has a protrusion corresponding to the insertion plate positioning groove, and insertion plate positioning holes are opened at both ends of the side plate corresponding to the pin holes on the pin plates. It also includes a second positioning pin, which passes through the pin hole of the pin plate and the insertion plate positioning hole of the side plate to realize the fixed connection between the side plate and the lower ice box frame.

[0010] Furthermore, the vertical section of the sliding adjustment bracket consists of four vertical risers, each of which is inserted into a corresponding positioning square tube.

[0011] Furthermore, after the lower ice box and the upper ice box are fixedly connected, they can be enclosed to form a cavity for holding ice blocks. The size of the cavity can be adjusted by replacing the lower ice box and the upper ice box of different specifications to accommodate ice blocks of different lengths and widths.

[0012] Furthermore, the mounting arm has a T-shaped structure.

[0013] Advantages and positive effects of the present invention: By using a solidified ice box to keep the ice blocks in a stable and constrained state, the fixed boundary characteristics of continuous ice sheets in the actual polar environment are reproduced, solving the problems of ice block floating and boundary effect distortion in existing technologies, and improving the reliability of experimental data.

[0014] The sliding adjustment bracket and the positioning square tube work together to achieve multi-level vertical adjustment of the ice box, while the adjustment slot of the mounting plate enables flexible horizontal positioning, which can accurately adapt to the ice layer height and horizontal position requirements under different test conditions. At the same time, by replacing the upper and lower ice boxes of different specifications, it can adapt to ice blocks of different lengths and widths, and by adjusting the tightness of the connecting bolts, it can adapt to ice blocks of different thicknesses, which greatly expands the applicability of the device. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 The present invention provides a structure for a water surface ice layer fixed boundary simulation test device. Figure 1 ; Figure 2 The present invention provides a structure for a water surface ice layer fixed boundary simulation test device. Figure 2 ; Figure 3 A structural diagram of a positioning square tube for a water surface ice layer fixed boundary simulation test device provided by the present invention; Figure 4 The present invention provides a structural diagram of a sliding adjustment bracket for a water surface ice layer fixed boundary simulation test device.

[0017] Figure 5 The diagram shows the structure of the lower ice box of a water surface ice layer fixed boundary simulation test device provided by the present invention.

[0018] Figure 6 The structural diagram of the side plate of the water surface ice layer fixed boundary simulation test device provided by the present invention.

[0019] Figure 7 The diagram shows the structure of the upper ice box of a water surface ice layer fixed boundary simulation test device provided by the present invention.

[0020] In the diagram: 1. External frame; 2. Test water tank; 3. Positioning square tube; 4. Sliding adjustment bracket; 5. First positioning pin; 6. Lower ice box; 7. Side insert plate; 8. Upper ice box; 9. Ice block; 10. Second positioning pin; 301. First pin hole; 401. Limiting plate; 402. Positioning hole of sliding adjustment bracket; 403. Mounting plate; 404. Adjustment slot; 601. Ice-bearing plate; 602. Insert plate positioning slot; 603. Second pin hole; 604. Mounting arm; 605. Fastening screw hole; 606. Lower ice box connecting plate; 701. Insert plate positioning hole; 702. Protrusion; 801. Ice-pressing plate; 802. Connecting bolt; 803. Upper ice box connecting plate. Detailed Implementation

[0021] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. 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 should fall within the scope of protection of the present invention.

[0022] This invention provides a simulation test device for a fixed boundary of ice layer on a water surface, such as... Figure 1-2 As shown, it includes an outer frame 1, a test water tank 2, and a simulation test assembly; the outer frame 1 is a cubic frame, and the test water tank 2 is located inside the outer frame 1; a positioning square tube 3 is vertically installed on the top of the outer frame 1 above the test water tank 2.

[0023] like Figure 1-2 As shown in Figures 3-4, the simulation test assembly includes a cubic sliding adjustment bracket 4, a first positioning pin 5, and an ice-fixing box. The vertical section of the sliding adjustment bracket 4 consists of four vertical tubes, each inserted into a corresponding positioning square tube 3. The positioning square tube 3 has uniformly spaced first pin holes 301 along the vertical direction. The vertical section of the sliding adjustment bracket 4 also has uniformly spaced sliding adjustment bracket positioning holes 402 along the vertical direction. The first positioning pin 5 passes through the corresponding first pin hole 301 and the corresponding sliding adjustment bracket positioning hole 402. A limiting plate 401 is installed at the top of the vertical section of the sliding adjustment bracket 4. The horizontal surface area of ​​the limiting plate 401 is larger than the horizontal contour area of ​​the positioning square tube 3. A mounting plate 403 is fixed to the inner edge of the bottom of the sliding adjustment bracket 4, and an adjustment slot 404 is provided on the mounting plate 403.

[0024] like Figure 5-7As shown, the ice-fixing box includes a lower ice-fixing box 6 and an upper ice-fixing box 8, both of which are square frame structures. An ice-supporting plate 601 is fixed to the inner edge of the lower ice-fixing box 6, and an ice-pressing plate 801 is fixed to the inner edge of the upper ice-fixing box 8. When the upper ice-fixing box 8 is located inside the lower ice-fixing box 6, the outer wall of the upper ice-fixing box 8 can fit against the inner wall of the lower ice-fixing box 6. After the lower ice-fixing box 6 and the upper ice-fixing box 8 are fixedly connected, they can form a cavity for holding ice blocks. The size of the cavity can be adjusted by replacing the lower ice-fixing box 6 and the upper ice-fixing box 8 with different specifications to accommodate ice blocks of different lengths and widths.

[0025] A lower ice-freezing box 6 has a lower ice-freezing box connecting plate 606 installed on its outer side wall. An upper ice-freezing box connecting plate 803 is installed on the outer side wall of the upper ice-freezing box 8 at the position corresponding to the lower ice-freezing box connecting plate 606. The upper ice-freezing box connecting plate 803 is installed on the lower ice-freezing box connecting plate 606 via connecting bolts 802. A mounting arm 604 is horizontally installed on the outer side wall of the lower ice-freezing box. The mounting arm 604 has a T-shaped structure, and this T-shaped design enhances the load-bearing stability of the ice-freezing box. A fastening screw hole 605 is provided at the end of the mounting arm 604 furthest from the ice-freezing box. Fastening bolts are installed in the fastening screw hole 605 and the adjusting slot 404, allowing for a detachable and fixed connection between the mounting arm 604 and the mounting plate 403.

[0026] The lower ice box 6 includes a lower ice box frame 607 and a side plate 7. The lower ice box frame 607 is a square frame structure with one open side. An ice support plate 601 is installed at the bottom of the lower ice box frame 607. An insertion plate positioning groove 602 is provided on the ice support plate 601 at the position corresponding to the open side of the lower ice box frame 607. Pin plates 603 are provided at both ends of the open side of the lower ice box frame 607, and pin holes are provided on the pin plates 603. The bottom of the side plate 7 is provided with a protrusion 702 corresponding to the insertion plate positioning groove 602. Insertion plate positioning holes 701 are provided at both ends of the side plate 7 corresponding to the pin holes on the pin plates 603. It also includes a second positioning pin 10, which passes through the pin hole of the pin plate 603 and the insertion plate positioning hole 701 of the side plate 7 to realize the fixed connection between the side plate 7 and the lower ice box frame 607.

[0027] The ice is held in place by the ice-pressing plate of the upper ice box, the ice-supporting plate of the lower ice box, and the side insert plates, thus maintaining a stable and constrained state around the ice block and replicating the fixed boundary characteristics of a continuous ice sheet in the actual polar environment. The lower ice box frame adopts a single-sided open design, allowing the ice block to be pushed in smoothly from the side. Combined with the precise positioning and installation of the side insert plates, this effectively avoids breakage caused by uneven stress during the handling and installation of ice blocks, compared to the traditional top-down ice loading method, ensuring the integrity of the test samples.

[0028] Working principle: First, take out the lower ice box 6, side insert plate 7, upper ice box 8 and second positioning pin 10 and place them outside the test water tank 2. Slowly push the pre-frozen ice block into the open side of the lower ice box frame 607 until the ice block is attached to the inner wall of the lower ice box 6. Use the ice support plate 601 to support the bottom of the ice block.

[0029] Align the protrusion 702 of the side insert plate 7 with the insert plate positioning groove 602 on the ice plate 601 and insert it so that the side insert plate 7 fits against the open side of the lower ice box frame 607. Then insert the second positioning pin 10 into the pin hole of the pin plate 603 and the insert plate positioning hole 701 of the side insert plate 7 to fix the side insert plate 7 to the lower ice box frame 607 and prevent the ice from sliding out to the side.

[0030] Place the upper ice box 8 into the lower ice box 6, so that the outer side wall of the upper ice box 8 fits against the inner side wall of the lower ice box 6, and the ice pressing plate 801 fits against the upper surface of the ice block. The connecting bolt 802 passes through the connecting plate 803 of the upper ice box and the connecting plate 606 of the lower ice box. Tighten the bolt to fix the upper and lower ice boxes, thereby firmly clamping the ice block. If the ice block thickness is different, the tightness of the connecting bolt 802 can be adjusted to match.

[0031] Install the assembled ice-fixing box into the sliding adjustment bracket 4, so that the mounting arm 604 of the lower ice-fixing box 6 fits against the mounting plate 403 of the sliding adjustment bracket 4. Move the ice-fixing box horizontally along the adjustment slot 404 of the mounting plate 403 to the preset test position. Then, insert the fastening bolts into the fastening screw holes 605 of the mounting arm 604 and the adjustment slot 404, and tighten the bolts to fix the horizontal position of the ice-fixing box.

[0032] According to the required contact height of the ice layer on the water surface for the test, the sliding adjustment bracket 4 is moved up and down along the positioning square tube 3. When the lower surface of the ice block reaches the preset contact height of the water surface, the first positioning pin 5 is inserted into the first pin hole 301 of the positioning square tube 3 and the sliding adjustment bracket positioning hole 402 of the sliding adjustment bracket 4 to fix the vertical position of the sliding adjustment bracket 4 and the ice box. The limiting plate 401 at the top of the sliding adjustment bracket 4 can prevent the sliding adjustment bracket 4 from falling off the positioning square tube 3 during the adjustment process.

[0033] After the water surface in the test tank 2 returns to a stable state, place the test model above or below the cavity enclosed by the ice box, so that the test model interacts with the ice layer through collisions and crossings, thus completing the simulation test under the fixed boundary of the ice layer on the water surface. If it is necessary to change the test conditions, the above steps can be repeated to adjust the position, size or thickness of the ice block.

[0034] The adjustment steps performed by the test device of this application are standardized, and parameters such as ice block position and clamping force can be accurately replicated to ensure the consistency of test conditions for different batches and improve test repeatability. The components of the device are easy to disassemble and assemble, and there is no need to reconstruct the entire device when switching operating conditions, which greatly shortens the test preparation cycle and improves test efficiency.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A simulation test device for a fixed boundary of ice layer on a water surface, characterized in that, It includes an outer frame (1), a test water tank (2), and a simulation test assembly; the outer frame (1) is a cubic frame, and the test water tank (2) is located inside the outer frame (1); a positioning square tube (3) is vertically installed on the top of the outer frame (1) above the test water tank (2). The simulation test assembly includes a cubic sliding adjustment bracket (4), a first positioning pin (5), and an ice-fixing box. The vertical section of the sliding adjustment bracket (4) is inserted into the positioning square tube (3). The positioning square tube (3) is uniformly provided with first pin holes (301) along the vertical direction. The vertical section of the sliding adjustment bracket (4) is uniformly provided with sliding adjustment bracket positioning holes (402) along the vertical direction. The first positioning pin (5) is inserted into the corresponding first pin hole (301) and sliding adjustment bracket positioning hole (402). A mounting plate (403) is fixedly provided on the inner edge of the bottom of the sliding adjustment bracket (4), and an adjustment slot (404) is provided on the mounting plate (403); an installation arm (604) is horizontally installed on the outer wall of the ice box, and a fastening screw hole (605) is provided at the end of the installation arm (604) away from the ice box. Fastening bolts are installed in the fastening screw hole (605) and the adjustment slot (404) to realize the detachable and fixed connection between the installation arm (604) and the mounting plate (403).

2. The water surface ice layer fixed boundary simulation test device according to claim 1, characterized in that, A limiting plate (401) is installed at the top of the vertical section of the sliding adjustment bracket (4), and the horizontal surface area of ​​the limiting plate (401) is greater than the horizontal profile area of ​​the positioning square tube (3).

3. The water surface ice layer fixed boundary simulation test device according to claim 1, characterized in that, The ice-fixing box includes a lower ice-fixing box (6) and an upper ice-fixing box (8). Both the lower ice-fixing box (6) and the upper ice-fixing box (8) are square frame structures. An ice-supporting plate (601) is fixed on the inner edge of the lower ice-fixing box (6), and an ice-pressing plate (801) is fixed on the inner edge of the upper ice-fixing box (8). When the upper ice-fixing box (8) is located inside the lower ice-fixing box (6), the outer wall of the upper ice-fixing box (8) can fit against the inner wall of the lower ice-fixing box (6). An installation arm (604) is installed on the outer wall of the lower ice-fixing box (6).

4. The water surface ice layer fixed boundary simulation test device according to claim 3, characterized in that, The lower ice box (6) is equipped with a lower ice box connecting plate (606) on its outer side wall. The upper ice box (8) is equipped with an upper ice box connecting plate (803) on its outer side wall at the position corresponding to the lower ice box connecting plate (606). The upper ice box connecting plate (803) is installed on the lower ice box connecting plate (606) by connecting bolts (802).

5. The water surface ice layer fixed boundary simulation test device according to claim 3, characterized in that, The lower ice box (6) includes a lower ice box frame (607) and a side insert plate (7). The lower ice box frame (607) is a square frame structure with one open side. An ice support plate (601) is installed at the bottom of the lower ice box frame (607). An insert plate positioning groove (602) is provided on the ice support plate (601) at the position corresponding to the open side of the lower ice box frame (607). Pin plates (603) are provided at both ends of the open side of the lower ice box frame (607). The side plate (7) has a pin hole; the bottom of the side plate (7) has a protrusion (702) corresponding to the plate positioning groove (602), and the two ends of the side plate (7) have plate positioning holes (701) corresponding to the pin holes on the pin plate (603); it also includes a second positioning pin (10), which passes through the pin hole of the pin plate (603) and the plate positioning hole (701) of the side plate (7) to realize the fixed connection between the side plate (7) and the lower ice box holder (607).

6. The water surface ice layer fixed boundary simulation test device according to claim 1, characterized in that, The vertical section of the sliding adjustment bracket (4) consists of four vertical pipes, which are respectively inserted into the corresponding positioning square tubes (3).

7. The water surface ice layer fixed boundary simulation test device according to claim 3, characterized in that, After the lower ice box (6) and the upper ice box (8) are fixedly connected, they can be enclosed to form a cavity for holding ice. The size of the cavity can be adjusted by replacing the lower ice box (6) and the upper ice box (8) with different specifications to accommodate ice blocks of different lengths and widths.

8. The water surface ice layer fixed boundary simulation test device according to claim 3, characterized in that, The mounting arm (604) has a T-shaped structure.

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