An experimental water tank system and a teaching platform for ship statics experiments

Abstract

This invention discloses an experimental water tank system and a ship statics experimental teaching platform, belonging to the field of ship statics experimental teaching. The ship statics experimental teaching platform includes an experimental water tank system and an experimental ship model set within the experimental water tank system. In the experimental ship model, four transparent transverse bulkheads longitudinally divide the interior of the ship body into a bow compartment, three midship compartments, and a stern compartment. Two transparent longitudinal bulkheads laterally divide the bow or stern compartment into three areas, with the middle area being the bow area liquid tank. The middle compartment among the three midship compartments is the midship area liquid tank, which can be divided into two half-tanks or restored to a full tank via a vertically movable central bulkhead. A detachable grounding platform is used to ground the experimental ship model. This invention enables experimental teaching of ship static stability, first-type damaged stability, second-type damaged stability, third-type damaged stability, grounding, and mooring theories.

Description

Technical Field

[0001] This invention belongs to the field of experimental teaching of ship statics, and more specifically, relates to an experimental water tank system and an experimental teaching platform for ship statics. Background Technology

[0002] Currently, experimental teaching in marine statics at universities primarily focuses on simulating ship static stability, neglecting experimental teaching on various scenarios such as hull damage, grounding, four-anchor positioning, and single-point mooring. However, in actual ship navigation, grounding or collisions are inevitable, leading to stranding or hull damage. Experimental teaching on four-anchor positioning and single-point mooring is crucial because current offshore energy extraction and utilization often relies on marine engineering equipment such as semi-submersible drilling platforms and semi-submersible wind turbines, which are typically secured using four-anchor positioning and single-point mooring. Research on the forces, motion, and fatigue states of ship equipment under fluid-structure interaction remains a key research focus for universities and research institutes. Therefore, experimental teaching on hull damage, grounding, four-anchor positioning, and single-point mooring is particularly necessary for practical applications.

[0003] Therefore, it is necessary to study an experimental water tank system and a teaching platform for ship statics experiments. Summary of the Invention

[0004] In view of the above-mentioned defects or improvement needs of the existing technology, the present invention provides an experimental water tank system and a ship statics experimental teaching platform. The purpose is to design the structure of the experimental water tank system to realize experimental teaching of ship damage, thereby solving the technical problem that the existing ship statics experimental teaching methods are insufficient and cannot simulate various ship damage conditions.

[0005] To achieve the above objectives, the following technical solution is provided as one aspect of the present invention:

[0006] An experimental water tank system includes: a water tank, a microporous baffle, an overflow baffle, a circulating water tank, and a water flow simulation device, wherein,

[0007] The microporous baffle and the overflow baffle are fixedly spaced within the water tank. The right side of the microporous baffle is separated into an inlet water tank, the space between the microporous baffle and the overflow baffle is separated into an experimental water tank, and the left side of the overflow baffle is separated into a drain water tank. The lower part of the microporous baffle is provided with multiple micropores. The height of the overflow baffle is less than the height of the water tank.

[0008] The inlet water tank is connected to the circulating water tank in sequence via an inlet water tank pipe and a water supply pipe; the outlet water tank is connected to the circulating water tank via an outlet water pipe; the water flow simulation device is connected to the water supply pipe via a water flow simulation inlet pipe; the water flow simulation device is tubular and has a slender water flow simulation device outlet on one side; the water flow simulation device is fixed to the microporous partition inside the experimental water tank, and its height is the same as or slightly higher than the top of the overflow partition; the water flow simulation device outlet faces the water surface of the experimental water tank.

[0009] Preferably, the water inlet pipe is equipped with a water inlet solenoid valve; the water flow simulation inlet pipe is equipped with a water flow simulation inlet solenoid valve; and the water supply pipe is equipped with a water pump.

[0010] Preferably, the bottom of the experimental water tank is provided with multiple bottom fixing rings.

[0011] As another aspect of the present invention, the following technical solutions are also provided:

[0012] A static ship experiment teaching platform includes the aforementioned experimental water tank system and an experimental ship model, wherein,

[0013] The experimental boat model floats on the surface of the experimental water tank and is secured to the bottom of the experimental water tank.

[0014] Preferably, the experimental ship model includes: a ship body, transparent transverse bulkheads, transparent longitudinal bulkheads, first, second, and third liquid tank water inlet adjustment devices, and a central bulkhead. The four transparent transverse bulkheads are sequentially spaced from bow to stern within the ship body, longitudinally dividing the interior of the ship body into a bow compartment, three mid-section compartments, and a stern compartment. Two transparent longitudinal bulkheads are symmetrically arranged in either the bow or stern compartment, laterally dividing the bow or stern compartment into left, middle, and right regions. The middle region is a symmetrically arranged end-section liquid tank along the ship's centerline. The end-section liquid tank has a first liquid tank water inlet adjustment device on its sidewall and a first movable transparent top plate that can move up and down to adjust the volume of the end-section liquid tank.

[0015] The middle compartment of the three central compartments is the midship area liquid tank. A fixed slot is provided on each of the two side walls of the midship area liquid tank at the bottom and top of the ship's hull along the ship's length. The central bulkhead is located within these two fixed slots. When the central bulkhead is lowered to the bottom, the midship area liquid tank is divided into a left liquid tank and a right liquid tank. At this time, the top of the left liquid tank is equipped with a second movable transparent top plate that can be moved up and down to adjust the volume of the left liquid tank, and the top of the right liquid tank is equipped with a third movable transparent top plate that can be moved up and down to adjust the volume of the right liquid tank. When the central bulkhead is raised, the midship area liquid tank becomes a single tank. At this time, the top of the midship area liquid tank is equipped with a fourth movable transparent top plate that can be moved up and down to adjust the volume of the midship area liquid tank. The midship area liquid tank has a second liquid tank water inlet regulating device on the side wall corresponding to the upper liquid tank and a third liquid tank water inlet regulating device on the side wall corresponding to the lower liquid tank.

[0016] Preferably, the experimental vessel model further includes a detachable grounding platform, which is clamped and fixed to the side wall of the experimental water tank to enable the experimental vessel model to ground.

[0017] Preferably, the detachable grounding platform includes: an anti-slip rubber boss, shock-absorbing rubber, locking rubber, a locking spring, and a locking device, wherein,

[0018] The anti-slip rubber protrusions form the upper inclined surface of the detachable grounding platform, used to prevent the experimental ship model from running aground upon collision. A groove is dug from the bottom to the top of the lower right part of the detachable grounding platform. The shock-absorbing rubber is installed at the top of the groove, and multiple locking rubbers are installed on the inner side wall of the groove. The multiple locking rubbers on the right side wall of the groove are all fixed to the left side of the first plate. One end of multiple locking springs is fixed to the right side of the first plate, and the other end of the multiple locking springs is fixed to the right side wall of the groove. The locking device is screwed in from the right end face of the detachable grounding platform and presses against the right side of the first plate.

[0019] Preferably, the experimental ship model further includes: a gravity adjustment slider in the length direction, a gravity adjustment slider in the width direction, a vertical gravity adjustment slider, and an inclination sensor, wherein,

[0020] At the waterline height inside the experimental ship model, a gravity adjustment slider in the length direction is installed on each of its bow and stern sides, and a gravity adjustment slider in the width direction and a vertical gravity adjustment slider are installed in the middle of the ship; the tilt sensor is used to measure the heel angle of the experimental ship model.

[0021] Preferably, the first liquid tank water inlet regulating device is connected to a water source through a first water pipe passing through the bottom of the ship body and communicating with the outside, so as to control the injection of water into the liquid tank in the ship end area to simulate the hull breach state of the ship end compartment being flooded.

[0022] The second liquid tank water inlet regulating device is connected to a water source via a second water pipe passing through the bottom of the ship's hull and communicating with the outside, in order to control the injection of water into the port liquid tank. The third liquid tank water inlet regulating device is connected to a water source via a third water pipe passing through the bottom of the ship's hull and communicating with the outside, in order to control the injection of water into the port liquid tank. When the central bulkhead moves down to the bottom, water is injected into the port liquid tank or the starboard liquid tank to simulate the breached state of the side compartments in the midship area flooded. When the central bulkhead moves up, water is injected into the liquid tanks in the midship area via the second liquid tank water inlet regulating device or the third liquid tank water inlet regulating device to simulate the breached state of the entire midship area flooded.

[0023] Preferably, the experimental ship model is equipped with a ship end mooring ring, which is used to moor the experimental ship model by connecting it to the mooring ring at the bottom of the experimental water tank via a mooring cable.

[0024] Preferably, the end area liquid tank, the left liquid tank, and the right liquid tank are all equipped with water level sensors.

[0025] Preferably, the ship's hull is equipped with water gauges at the bow, stern, and midships for reading the ship's draft.

[0026] In summary, compared with the prior art, the above-described technical solutions conceived by this invention can achieve the following beneficial effects:

[0027] 1. The experimental water tank system provided by this invention divides the water tank into an inlet tank, an experimental water tank, and an outlet tank through a microporous baffle and an overflow baffle. Water from the circulating water tank is pumped into the inlet tank, and water from the inlet tank flows into the experimental water tank through the micropores on the microporous baffle, thereby simulating a still water area in the experimental water tank and eliminating the impact caused by the jetting of the pumped water column. When the experimental water tank is full, the water flows into the outlet tank through the overflow baffle and then into the circulating water tank, thus forming a circulating water system, which facilitates the conduct of experiments. While simulating still water experiments, ocean current experiments can also be carried out. Water is uniformly flowing into the water surface of the experimental water tank through the outlet of a water flow simulation device that is the same width and height as the experimental water tank or slightly higher than the top of the overflow baffle, thereby simulating a uniform ocean current in the experimental water tank.

[0028] 2. The ship statics experimental teaching platform provided by this invention places the experimental ship model in an experimental water tank system that can simulate still water and ocean currents, and innovatively designs the structure of the experimental ship model so that it can realize experimental teaching of ship static stability, first-class damaged stability, second-class damaged stability, third-class damaged stability, grounding, four-anchor positioning and single-point moored ship motion attitude in statics teaching experiments.

[0029] The experimental model ship is divided into a bow compartment, three midships compartments, and a stern compartment by four transparent transverse bulkheads. The bow compartment is further divided into three compartments by two transparent longitudinal bulkheads. The middle compartment is designated as the bow area liquid tank, and the middle compartment among the three midships compartments is designated as the midships area liquid tank. A central bulkhead is installed in the center of the midships area liquid tank. When the bulkhead is lowered to the bottom, the midships area liquid tank is divided into left and right sections (for the actual experimental model ship, the length direction is considered the longitudinal direction, the beam direction is considered the left and right directions, and the depth direction is considered the lateral direction). The experiment simulates the static stability of a ship and the first, second, and third types of damage under various hull conditions by controlling the water injection of the end tank, the entire midships tank, and the half-tank (port or starboard) midships tank. It also includes experimental teaching of grounding theory through a detachable grounding platform, and experimental teaching of four-anchor positioning and single-point mooring ship motion attitude through four-point or single-point mooring of the ship model.

[0030] A first liquid tank water inlet regulating device is installed on the side wall of the liquid tank in the ship's end area. A first movable transparent top plate, which can move up and down to adjust the volume of the liquid tank in the ship's end area, is installed on the top. The first liquid tank water inlet regulating device controls the amount and speed of water injected into the liquid tank in the ship's end area, and the first movable transparent top plate controls the volume of the liquid tank in the ship's end area, thus simulating the stability of the ship under a breached state. The liquid tank in the midship area can be divided into two liquid tanks, left and right, by lowering the midship area bulkhead. A second liquid tank water inlet regulating device controls the amount and speed of water injected into the upper liquid tank, and the second movable transparent top plate controls the volume of the left liquid tank, thus simulating a breached state where half of the midship area (left liquid tank) is flooded. A third liquid tank water inlet regulating device... The water inlet regulating device controls the water injection volume and rate into the starboard tank, and the volume of the lower tank is controlled by a third movable transparent top plate, thus simulating the breached state of half-tank (starboard tank) flooding in the midship area. By moving the central bulkhead upward, the midship area tank can be restored to a complete tank. At this time, a single fourth movable transparent top plate is used to control the volume of the midship area tank. The water injection volume and rate into the midship area tank can be controlled by either the second or third water inlet regulating device, thus simulating the breached state of the entire midship area flooding. Each breached state can be used for experimental teaching of Type I breach stability, Type II breach stability, and Type III breach stability.

[0031] 3. The ship statics experimental teaching platform provided by this invention is designed with a detachable grounding platform structure. When conducting grounding experiments, the detachable grounding platform is directly clamped to the side wall of the experimental water tank. In order to prevent the experimental ship model from slipping after grounding, anti-slip rubber protrusions are provided at the grounding position of the platform. Shock-absorbing rubber is provided in the platform clamping part. Locking rubber prevents damage to the side wall of the water tank during clamping. The clamping end achieves the clamping process through locking spring. After clamping and fixing, the platform is fixed by rotating locking device.

[0032] 4. The ship statics experimental teaching platform provided by this invention has a length-direction gravity adjustment slider on each of the bow and stern sides at the waterline height inside the experimental ship model, and a width-direction gravity adjustment slider and a vertical gravity adjustment slider in the middle of the ship. After sliding one or more of the gravity adjustment sliders, the ship's heel angle in that state can be known through the tilt sensor, and the initial stability height of the experimental ship model in that state can be obtained through the initial stability calculation formula.

[0033] 5. The ship statics experimental teaching platform provided by this invention has multiple bottom mooring rings at the bottom of the experimental water tank and end mooring rings on the experimental ship model. The experimental ship model can be moored in any posture through mooring cables, bottom mooring rings, and end mooring rings, thereby realizing the experimental teaching of theories such as four-anchor positioning and single-point mooring in statics teaching experiments. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the structure of the ship statics experimental teaching platform in a preferred embodiment of the present invention;

[0035] Figure 2 This is a schematic diagram of the water flow simulation device in a preferred embodiment of the present invention;

[0036] Figure 3 This is a schematic diagram of the experimental ship model structure in a preferred embodiment of the present invention;

[0037] Figure 4 This is a schematic diagram of the cross-sectional structure of the liquid tank in the middle area of ​​the experimental ship model in a preferred embodiment of the present invention;

[0038] Figure 5 This is a schematic diagram of the cross-sectional structure of the liquid tank in the end area of ​​the experimental ship model in a preferred embodiment of the present invention;

[0039] Figure 6 This is a schematic diagram of the detachable stranded platform structure in a preferred embodiment of the present invention.

[0040] In all the accompanying drawings, the same reference numerals are used to denote the same elements or structures, wherein:

[0041] 1. Water tank; 2. Inlet water tank; 3. Experimental water tank; 4. Outlet water tank; 5. Microporous baffle; 6. Micropore; 7. Overflow baffle; 8. Outlet water pipe; 9. Circulating water tank; 10. Inlet water pipe; 11. Water flow simulation inlet pipe; 12. Inlet water tank pipe; 13. Water pump; 14. Water flow simulation inlet pipe solenoid valve; 15. Inlet water tank pipe solenoid valve; 16. Water flow simulation device; 17. Water flow simulation device outlet; 18. Mooring cable; 19. Tension sensor; 20. Experimental water tank bottom mooring ring; 21. Experimental boat model; 22. Transparent 23. Transparent transverse bulkhead; 24. Gravity adjustment slider in the length direction; 25. Gravity adjustment slider in the beam direction; 26. Vertical gravity adjustment slider; 27. Midships liquid tank; 28. End area liquid tank; 29. ​​Liquid tank water inlet adjustment device; 30. Upper and lower fixing grooves of bulkhead; 31. End mooring ring; 32. Midships liquid tank bulkhead; 33. Movable transparent top plate; 34. Detachable grounding platform; 35. Anti-slip rubber boss; 36. Shock-absorbing rubber; 37. Locking rubber; 38. Locking spring; 39. Locking device. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0043] In the description of this invention, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means two or more. The terms "first," "second," "third," and "fourth," etc., in the specification of this invention are used to distinguish different objects, not to describe a specific order.

[0044] In this invention, the terms "first type of damage," "second type of damage," "third type of damage," "four-anchor positioning," and "single-point mooring" are standard terms in the art, and their meanings are well-known in the field. Specifically, "first type of damage" refers to a damaged compartment that has been flooded and is completely filled with water; "second type of damage" refers to a damaged compartment that has been flooded but is not completely filled with water and is not connected to the outside; "third type of damage" refers to a damaged compartment that has been flooded but is not completely filled with water and is connected to the outside; "four-anchor positioning" means that all four corners of the ship / experimental vessel model are anchored to the bottom; and "single-point mooring" means that the ship / experimental vessel model is anchored to a single point.

[0045] This invention aims to provide experimental teaching on ship statics. Combining the current needs of marine equipment use and development, it proposes an experimental teaching platform for theories such as ship static stability, Class I damage stability, Class II damage stability, Class III damage stability, grounding, four-anchor positioning, and single-point mooring.

[0046] like Figure 1 As shown, the ship statics experimental teaching platform provided in this embodiment of the invention includes an experimental water tank system, an experimental ship model 21, and a detachable grounding platform 34.

[0047] The experimental water tank system includes water tank 1, inlet water tank 2, experimental water tank 3, outlet water tank 4, microporous baffle 5, micropores 6, overflow baffle 7, outlet water pipe 8, circulating water tank 9, inlet water pipe 10, water flow simulation inlet pipe 11, inlet water tank pipe 12, water pump 13, water flow simulation inlet pipe solenoid valve 14, inlet water tank pipe solenoid valve 15, water flow simulation device 16, water flow simulation device outlet 17, mooring cable 18, tension sensor 19, and bottom fixing ring of the experimental water tank 20.

[0048] The microporous baffle 5 and the overflow baffle 7 are fixedly installed in the water tank 1 at intervals. The right side of the microporous baffle 5 is separated into the inlet water tank 2, the microporous baffle 5 and the overflow baffle 7 are separated into the experimental water tank 3, and the left side of the overflow baffle 7 is separated into the outlet water tank 4. The lower part of the microporous baffle 5 is provided with multiple micropores 6 (micropore diameter 1-5mm, preferably 2mm) to allow water in the inlet water tank 2 to flow into the experimental water tank 3 through the multiple micropores 6 to simulate a still water area in the experimental water tank 3. The height of the overflow baffle 7 is less than the height of the water tank 1. When the water level in the experimental water tank 3 is higher than the height of the overflow baffle 7, the water overflows from the upper part of the overflow baffle 7 to the outlet water tank 4.

[0049] Water inlet tank 2 is connected to circulating water tank 9 via water inlet pipe 12 and water supply pipe 10. Water inlet pipe 12 is equipped with a solenoid valve 15. Water outlet tank 4 is connected to circulating water tank 9 via water outlet pipe 8. Figure 2As shown, the water flow simulation device 16 is connected to the water supply pipe 10 through the water flow simulation inlet pipe 11, and the water flow simulation inlet pipe 11 is equipped with a water flow simulation inlet solenoid valve 14; the water pump 13 is installed on the water supply pipe 10. The water flow simulation device 16 is tubular and has a slender water flow simulation device outlet 17 on one side. The water flow simulation device 16 is fixed on the microporous partition 5 inside the experimental water tank 3, and its height is the same as or slightly higher than the top of the overflow partition 7. The water flow simulation device outlet 17 faces the water surface of the experimental water tank 3, and its length is equal to the width of the experimental water tank 3 so that the water flowing out of the water flow simulation device outlet 17 flows evenly to the water surface of the experimental water tank 3 to simulate a uniform ocean current.

[0050] The bottom of the experimental water tank 3 is equipped with multiple bottom mooring rings 20, which are used to moor the experimental ship model 21 in any posture via the mooring cable 18; the stress level on the mooring cable 18 can be measured by the tension sensor 19 arranged on the mooring cable 18.

[0051] During use, water in the circulating water tank 9 is pumped into the inlet water tank 2 via the water pump 13, the water supply pipe 10, and the inlet water tank pipe 12. During this time, the inlet water tank pipe solenoid valve 15 is in the open state, and the water flow simulation inlet water pipe solenoid valve 14 is in the closed state. Water in the inlet water tank 2 flows into the experimental water tank 3 through the micropores 6 on the microporous baffle 5. The microporous baffle 5 can simulate a still water area in the experimental water tank 3, eliminating the influence of the water jet pumped in by the water pump 13. After the experimental water tank 3 is full of water, the water flows into the outlet water tank 4 through the overflow baffle 7. The outlet water tank 4 is connected to the outlet water pipe 8 and flows into the circulating water tank 9, thus forming a circulating water system, which facilitates the conduct of experiments.

[0052] This invention can simulate still water experiments while simultaneously conducting ocean current experiments. During the ocean current simulation experiment, the inlet water tank solenoid valve 15 is in the closed state, while the water flow simulation inlet water pipe solenoid valve 14 is in the open state. The water supply pipe 10 flows into the water flow simulation device 16 through the water flow simulation inlet water pipe 11. The water flow simulation device 16 is placed inside the experimental water tank 3 and fixed on the microporous partition 5. Its width is the same as that of the experimental water tank 3. It is provided with a slender water flow simulation device outlet 17. The height of the water flow simulation device outlet 17 is the same as or slightly higher (0-5cm higher) at the top of the overflow partition 7. The length of the water flow simulation device outlet 17 is the same as the width of the experimental water tank 3. While injecting water into the experimental water tank 3, ocean currents can be simulated. The water flow speed can be adjusted by the water pump 13. The surface of the water is called a "current," and underwater it is called a "vortex." Through the outlet 17 of the water flow simulation device, which is at the same height or slightly higher than the top of the overflow baffle 7, the water flowing out of the outlet 17 of the water flow simulation device flows directly to the surface of the experimental water tank 3, thereby simulating ocean currents. The length of the outlet 17 of the water flow simulation device is the same as the width of the experimental water tank 3, so that the simulated ocean current in the experimental water tank 3 forms a uniform flow field, which can be used to demonstrate the motion posture of ships in a single ocean current to students in teaching.

[0053] The experimental boat model 21 floats on the surface of the experimental water tank 3 and is secured to the bottom of the experimental water tank 3 by multiple mooring cables 18. Figure 3 As shown, the experimental ship model 21 includes a transparent transverse bulkhead 22, a transparent longitudinal bulkhead 23, a gravity adjustment slider 24 along the length direction, a gravity adjustment slider 25 along the width direction, a vertical gravity adjustment slider 26, a liquid tank in the midship area 27, a liquid tank in the end area 28, a liquid tank water inlet adjustment device 29, upper and lower fixing grooves 30 for the bulkhead in the midship area liquid tank, a mooring ring 31, a bulkhead in the midship area liquid tank 32, and a movable transparent top plate 33. The liquid tank water inlet adjustment device 29 includes a first liquid tank water inlet adjustment device, a second liquid tank water inlet adjustment device, and a third liquid tank water inlet adjustment device. The movable transparent top plate 33 includes a first movable transparent top plate, a second movable transparent top plate, a third movable transparent top plate, and a fourth movable transparent top plate.

[0054] Four transparent transverse bulkheads 22 are sequentially spaced within the experimental ship model 21 from bow to stern, longitudinally dividing the ship's interior into a bow compartment, three mid-section compartments, and a stern compartment; Figure 5 As shown, two transparent longitudinal bulkheads 23 are symmetrically arranged vertically within the bow compartment, dividing the bow compartment into three symmetrically defined areas: left, middle, and right. The middle area is the bow area liquid tank 28, which has a first liquid tank water inlet adjustment device on its sidewalls and a first movable transparent top plate that can be moved up and down to adjust the internal volume of the bow area liquid tank 28. The middle compartment among the three middle compartments is the midship area liquid tank 27, as shown... Figure 4As shown, a fixed groove is provided at the bottom and top of the ship body along the length of the ship between the middle of the two side walls of the midship area liquid tank 27. The midship bulkhead 32 is movably installed in the two fixed grooves. When the midship area liquid tank 27 is lowered to the bottom, it is divided into a left liquid tank and a right liquid tank. At this time, the top of the left liquid tank is provided with a second movable transparent top plate that can be moved up and down to adjust the volume of the left liquid tank, and the top of the right liquid tank is provided with a third movable transparent top plate that can be moved up and down to adjust the volume of the right liquid tank. When the midship area liquid tank 27 is moved up, it becomes a whole tank. At this time, the top of the midship area liquid tank 27 is provided with a fourth movable transparent top plate that can be moved up and down to adjust the volume of the midship area liquid tank 27. The midship area liquid tank 27 is provided with a second liquid tank water inlet adjustment device on the side wall corresponding to the upper liquid tank and a third liquid tank water inlet adjustment device on the side wall corresponding to the right liquid tank.

[0055] The first liquid tank water inlet regulating device connects to a water source via a first water pipe passing through the bottom of the ship's hull and is used to control the inflow and outflow of water into the end tank 28, simulating a breached state caused by flooding in the end compartment. The second liquid tank water inlet regulating device connects to a water source via a second water pipe passing through the bottom of the ship's hull and is used to control the inflow and outflow of water into the port liquid tank. The third liquid tank water inlet regulating device connects to a water source via a third water pipe passing through the bottom of the ship's hull and is used to control the inflow and outflow of water into the starboard liquid tank. When the bulkhead 32 is lowered to the bottom, water is injected into either the port or starboard liquid tank to simulate a breached state caused by flooding in the midship side compartment. When the bulkhead 32 is raised, water is injected into the midship liquid tank 27 via the second or third liquid tank water inlet regulating device to simulate a breached state caused by flooding in the entire midship compartment. The situation inside the liquid tanks can be clearly observed through the transparent bulkheads and transparent top panels. Each liquid tank is equipped with a water level sensor, which can read the water level of the compartment at the boundary when the water is entering the tank, calculate the capacity of each compartment, and establish a corresponding database. After knowing the ship's heel angle, trim angle, and water level height of the compartment, it can immediately provide feedback on the current water level of the compartment.

[0056] To measure the static stability of the experimental ship model 21 under various conditions, a gravity adjustment slider 24 along the length of the ship is installed at the waterline height inside the experimental ship model 21, and a gravity adjustment slider 25 along the width of the ship and a vertical gravity adjustment slider 26 are installed in the middle of the ship. After sliding the gravity adjustment sliders, the ship's heel angle θ under this condition can be determined by the tilt sensor installed in the upper fixed groove 30 of the bulkhead in the middle area of ​​the experimental ship 21. The initial metacentric height of the ship under this condition can then be obtained by using the initial metacentric calculation formula.

[0057]

[0058] In the formula, This refers to the ship's current displacement. For high initial stability, θ is the ship's inclination angle. To adjust the weight of the slider by gravity, Gravity adjustment slider sliding distance and The gravity adjustment slider in the text refers to the slider adjusted in the two gravity adjustment sliders 24 in the length direction, 25 in the width direction, and 26 in the vertical direction.

[0059] Both sides of the experimental ship model 21 are equipped with end mooring rings 31, which are used to moor the experimental ship model 21 by connecting it to the bottom mooring rings 20 of the experimental water tank via mooring cables 18.

[0060] To ensure the ship still has good buoyancy in the damaged state, the experimental ship model 21 adopts a pontoon shape. The experimental ship model 21 is equipped with water gauges at the bow, stern, and midships to facilitate reading the ship's draft in this state. Water level sensors are installed in the end tank 28, the upper tank, and the lower tank.

[0061] In the experimental ship model 21, four transparent transverse bulkheads 22 divide the ship into one compartment each at the bow and stern, and three compartments in the midships. With the length direction as the longitudinal direction and the beam direction as the transverse direction, the longitudinal compartments at the bow and stern are used to simulate longitudinal failure stability. The middle compartment among the three midships is used to simulate failure stability under midships flooding. Considering the symmetry of the ship, only the bow or stern compartments are separated into end-area liquid tanks 28 by two transparent longitudinal bulkheads 23. By forming symmetrical end-area liquid tanks 28 along the ship's centerline only in the midships of the bow or stern compartments, the ship becomes symmetrical from side to side. Furthermore, compared to overall flooding at the bow or stern, the flooding in the end-area liquid tanks 28 significantly reduces the amount of water entering, thus preventing large-scale flooding at the bow and ensuring the ship's stability under breached conditions. The midships liquid tank 27 is a liquid tank that runs through both the port and starboard sides. The bottom and top areas of the midships liquid tank 27 are equipped with upper and lower fixing grooves 30 for the midships liquid tank bulkhead. By adding a midships liquid tank bulkhead 32 in the upper and lower fixing grooves 30, the hull breach state of the entire midships liquid tank and half of the tank can be simulated. Each liquid tank is equipped with a movable transparent top plate 33. The different positions of the movable transparent top plate 33 can simulate the first type of breach, the second type of breach, and the third type of breach.

[0062] like Figure 6 As shown, the detachable grounding platform 34 is detachably clamped and fixed to the side wall of the experimental water tank 3. The detachable grounding platform 34 includes an anti-slip rubber boss 35, a shock-absorbing rubber 36, a locking rubber 37, a locking spring 38, and a locking device 39.

[0063] Among them, the anti-slip rubber protrusion 35 forms the upper inclined surface of the detachable grounding platform 34, which is used to test the collision and grounding of the ship model 21. The lower right part of the detachable grounding platform 34 has a groove dug from the bottom to the top. The top of the groove is equipped with shock-absorbing rubber 36, and multiple locking rubbers 37 are installed on the inner side wall of the groove. The multiple locking rubbers 37 on the right side wall of the groove are all fixed to the left side of the first plate. One end of multiple locking springs 38 is fixed to the right side of the first plate, and the other end of multiple locking springs 38 is fixed to the right side wall of the groove. The locking device 39 is screwed in from the right end face of the detachable grounding platform 34 and presses against the right side of the first plate.

[0064] The detachable grounding platform 34 is triangular in shape. When conducting grounding experiments, the platform is directly clamped to the side wall of the experimental water tank 3. In order to prevent the experimental ship model 21 from slipping after grounding, anti-slip rubber protrusions 35 are provided at the grounding position of the platform. Shock-absorbing rubber 36 is provided in the platform clamping part, and locking rubber 37 is provided to prevent damage to the side wall of the water tank during clamping. The clamping end is clamped by locking spring 38. After clamping and fixing, the platform is fixed by rotating locking device 39.

[0065] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A ship statics experimental teaching platform, characterized in that, This includes an experimental water tank system and an experimental ship model (21), among which, The experimental ship model (21) includes: the ship body, transparent transverse bulkheads (22), transparent longitudinal bulkheads (23), first, second, and third liquid tank water inlet adjustment devices, and a central bulkhead (32). The four transparent transverse bulkheads (22) are arranged sequentially and spaced apart from the bow to the stern of the ship body, dividing the interior of the ship body longitudinally into a bow compartment, three mid-section compartments, and a stern compartment. The two transparent longitudinal bulkheads (23) are symmetrically arranged in the bow compartment or the stern compartment, dividing the bow compartment or the stern compartment laterally into three areas: left, middle, and right. The middle area is a ship end area liquid tank (28) symmetrical along the ship centerline. The side wall of the ship end area liquid tank (28) is provided with a first liquid tank water inlet adjustment device, and the top is provided with a first movable transparent top plate that can be moved up and down to adjust the internal volume of the ship end area liquid tank (28). The middle compartment of the three central compartments is the midship area liquid tank (27). A fixed groove is provided on each of the two side walls of the midship area liquid tank (27) at the bottom and top of the ship's body along the ship's length. The central bulkhead (32) is located within these two fixed grooves. When the central bulkhead (32) moves down to the bottom, it divides the midship area liquid tank (27) into a left liquid tank and a right liquid tank. At this time, the top of the left liquid tank is provided with a second movable transparent top plate that can move up and down to adjust the volume of the left liquid tank. The right liquid tank... The top is provided with a third movable transparent top plate that can be moved up and down to adjust the volume of the right liquid tank; when the central partition (32) moves up, the midship area liquid tank (27) is a whole tank, and at this time the top of the midship area liquid tank (27) is provided with a fourth movable transparent top plate that can be moved up and down to adjust the volume of the midship area liquid tank (27); the midship area liquid tank (27) is provided with a second liquid tank water inlet adjustment device on the side wall corresponding to the upper liquid tank, and a third liquid tank water inlet adjustment device on the side wall corresponding to the lower liquid tank; The experimental water tank system includes: a water tank (1), a microporous baffle (5), an overflow baffle (7), a circulating water tank (9), and a water flow simulation device (16).

2. The ship statics experimental teaching platform as described in claim 1, characterized in that, The microporous baffle (5) and the overflow baffle (7) are fixed at intervals inside the water tank (1). The water tank (1) is divided into two sections: the right side of the microporous baffle (5) is the inlet water tank (2), the space between the microporous baffle (5) and the overflow baffle (7) is the experimental water tank (3), and the left side of the overflow baffle (7) is the outlet water tank (4). The microporous baffle (5) has multiple micropores (6) at its lower part. The height of the overflow baffle (7) is less than the height of the water tank (1). The inlet water tank (2) is connected to the circulating water tank (9) in sequence via the inlet water tank pipe (12) and the water supply pipe (10); the outlet water tank (4) is connected to the circulating water tank (9) via the outlet water pipe (8); the water flow simulation device (16) is connected to the water supply pipe (10) via the water flow simulation inlet pipe (11); the water flow simulation device (16) is tubular and has a slender water flow simulation device outlet (17) on one side; the water flow simulation device (16) is fixed on the microporous partition (5) inside the experimental water tank (3), and its height is the same as or slightly higher than the top of the overflow partition (7); the water flow simulation device outlet (17) faces the water surface of the experimental water tank (3).

3. The ship statics experimental teaching platform as described in claim 2, characterized in that, The water inlet pipe (12) is equipped with a water inlet pipe solenoid valve (15); the water flow simulation water inlet pipe (11) is equipped with a water flow simulation water inlet pipe solenoid valve (14); and the water supply pipe (10) is equipped with a water pump (13).

4. The ship statics experimental teaching platform as described in claim 1, characterized in that, The experimental water tank (3) is equipped with multiple bottom fixing rings (20) at the bottom.

5. The ship statics experimental teaching platform as described in claim 1, characterized in that, The experimental boat model (21) floats on the surface of the experimental water tank (3) and is secured to the bottom of the experimental water tank (3).

6. The ship statics experimental teaching platform as described in claim 1, characterized in that, The experimental ship model (21) also includes a detachable grounding platform (34), which is clamped and fixed to the side wall of the experimental water tank (3) to achieve grounding of the experimental ship model (21).

7. The ship statics experimental teaching platform as described in claim 6, characterized in that, The detachable grounding platform (34) includes: anti-slip rubber boss (35), shock-absorbing rubber (36), locking rubber (37), locking spring (38), and locking device (39), wherein, The anti-slip rubber protrusion (35) forms the upper inclined surface of the detachable grounding platform (34) for the experimental ship model (21) to collide and run aground. The detachable grounding platform (34) has a groove dug from the bottom to the top on the right side. The shock-absorbing rubber (36) is installed at the top of the groove. Multiple locking rubbers (37) are installed on the inner side wall of the groove. The multiple locking rubbers (37) on the inner right side wall of the groove are all fixed to the left side of the first plate. One end of multiple locking springs (38) is fixed to the right side of the first plate. The other end of the multiple locking springs (38) is fixed to the inner right side wall of the groove. The locking device (39) is screwed in from the right end face of the detachable grounding platform (34) and presses against the right side face of the first plate.

8. The ship statics experimental teaching platform as described in claim 1, characterized in that, The experimental ship model (21) also includes: a gravity adjustment slider (24) in the length direction, a gravity adjustment slider (25) in the width direction, a gravity adjustment slider (26) in the vertical direction, and an inclination sensor, wherein, At the waterline height inside the experimental ship model (21), a gravity adjustment slider (24) in the length direction is set on each of its bow and stern sides, and a gravity adjustment slider (25) in the width direction and a gravity adjustment slider (26) in the middle of the ship are set; the tilt sensor is used to measure the heel angle of the experimental ship model (21).

9. The ship statics experimental teaching platform as described in claim 1, characterized in that, The first liquid tank water inlet regulating device is connected to a water source through a first water pipe passing through the bottom of the ship body and communicates with the outside, in order to control the injection of water into the liquid tank (28) in the ship end area to simulate the ruptured state of the ship end compartment being flooded; The second liquid tank water inlet regulating device is connected to a water source through a second water pipe passing through the bottom of the ship body and communicates with the outside to control the injection of water into the port liquid tank. The third liquid tank water inlet regulating device is connected to a water source through a third water pipe passing through the bottom of the ship body and communicates with the outside to control the injection of water into the port liquid tank. When the central bulkhead (32) moves down to the bottom, water is injected into the port liquid tank or the starboard liquid tank to simulate the breached state of the side compartments in the midship area flooded. When the central bulkhead (32) moves up, water is injected into the midship area liquid tank (27) through the second liquid tank water inlet regulating device or the third liquid tank water inlet regulating device to simulate the breached state of the entire midship area flooded.

10. A ship statics experimental teaching platform as described in claim 4, characterized in that, The experimental ship model (21) is equipped with a ship end mooring ring (31), which is used to moor the experimental ship model (21) by connecting it to the mooring ring (20) at the bottom of the experimental water tank via a mooring cable (18).

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