Ship collision test system and test method

Abstract

The invention relates to the field of ships, in particular to a ship collision test system and test method. The ship collision test system is characterized in that front and rear ashore fixing frames are arranged on the two banks of a pool respectively, winches are arranged on the ashore fixing frames, guide rails are arranged between the front and rear ashore fixing frames on the same side, a movable frame stretches across the two banks of the pool, the two ends of the movable frame are movably connected to the guide rails respectively, and the movable frame is pulled by a steel wire rope to move on the guide rails; the test ship model is movably connected with the middle part of the movable frame and moves in the pool; a speed measuring instrument is arranged in the test ship model; a test plate is arranged in the pool, and a sensor for dynamic data acquisition is mounted on the back of the test plate and used for acquiring relevant corresponding data of the test plate after the test ship model collides with the test plate; and the control unit is used for receiving a signal of the speed measuring instrument and controlling the traction direction and the traction speed of the winch. A crash test is completed by using the system. The method is accurate, rapid, convenient to control and low in cost.

Description

Technical Field

[0001] This invention relates to the field of shipbuilding, and more particularly to a ship collision testing system and testing method. Background Technology

[0002] Ship collisions can lead to catastrophic accidents and are generally categorized into two research areas: ship-to-ship collisions and ship-to-fixed-object collisions. Because the collision process between a ship and a structure involves highly complex nonlinear plastic deformation, theoretical calculations and analyses often result in significant errors. Therefore, conducting collision tests is an essential part of related research. The main experimental methods for ship collisions include full-scale tests, large-scale model tests, and small-scale model tests. The first two are resource-intensive, time-consuming, risky, and require stringent experimental conditions. However, currently, reliable control methods and testing systems are lacking for small-scale tests. Therefore, it is crucial to research and develop a reliable ship collision testing system that can be conducted in a test tank. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a ship collision test system and test method that is accurate, fast, easy to control, and low in cost.

[0004] The present invention provides a ship collision test system, comprising: a shore-based fixed frame, a steel wire rope, a winch, a movable frame, a guide rail, a test ship model, sensors, a speed measuring instrument, and a control unit;

[0005] Two fixed supports are installed on the banks of the pool, one at the front and one at the back, and winches are mounted on the fixed supports.

[0006] Guide rails are installed between the two shore-based fixed frames on the same side.

[0007] The mobile frame spans both sides of the pool, with its two ends connected to guide rails and moved by steel wire ropes.

[0008] The test boat model is movably connected to the middle of the mobile frame and moves within the water tank; a speed measuring instrument is installed inside the test boat model.

[0009] The pool contains a test plate, and a dynamic data acquisition sensor is installed on the back of the test plate to collect relevant data of the test plate after the test ship model collides with it.

[0010] The control unit receives signals from the speed measuring instrument and controls the traction direction and traction speed of the winch.

[0011] In one specific embodiment of the present invention, the mobile frame is provided with cable guide holes at both ends, and the wire rope passes through the cable guide holes to connect the winch and the mobile frame together.

[0012] In one specific embodiment of the present invention, the test plate is fixed by a clamping mechanism.

[0013] In one specific embodiment of the present invention, the clamping mechanism is composed of a vertical frame.

[0014] In one specific embodiment of the present invention, the test ship model and the mobile frame are connected by a towing hook.

[0015] In one specific embodiment of the present invention, a photoelectric switch is provided near the front end of the shore-based fixed frame. The control circuit of the photoelectric switch is connected to the circuit circuit of the winch. Once the moving frame reaches the position of the photoelectric switch under the traction of the winch, the forward traction circuit is immediately de-energized, and the reverse traction circuit starts to work, causing the moving frame to decelerate until it stops.

[0016] In one specific embodiment of the present invention, the front winch is used to pull the wire rope in the forward direction, and the rear winch is used to pull the wire rope in the reverse direction.

[0017] In one specific embodiment of the present invention, a buffer pad is installed on the inner side of the shore-based fixing frame.

[0018] In one specific embodiment of the present invention, the bottom of the movable frame is provided with rollers, which contact the guide rail and move along the guide rail.

[0019] The present invention also provides a method for ship collision testing, which utilizes the ship collision testing system described above and includes the following steps:

[0020] First, start forward traction to accelerate the model ship to the predetermined speed; when the model ship reaches the predetermined speed, stop forward traction and at the same time, reverse traction to decelerate the moving frame until it stops. At this time, the test model ship separates from the moving frame under the action of inertia.

[0021] The test ship model continued to move forward at a certain speed and completed the collision process with the test plate. The speed measuring instrument obtained the speed value of the ship model at the moment the collision began; at the same time, the data acquisition sensor on the back of the test plate recorded the test data throughout the collision process.

[0022] Compared with existing technologies, the ship collision test system and method of this invention utilize forward and reverse traction to achieve motion control of the moving frame. The test ship model is connected to the moving frame via a traction hook, and separates from the moving frame when the ship model reaches a predetermined speed. The test ship model collides with the collision structure at a given position in the water tank via guide rails, ensuring the correct direction and speed. Data acquisition sensors on the structure record relevant data. This method is accurate, fast, and easy to control. Furthermore, since various small-scale collision tests between ships and structures can be repeatedly performed in this ship collision test system, the problems of difficulty in control and high cost associated with actual ship collision tests are avoided. Attached Figure Description

[0023] Figure 1 A top view of a ship collision testing system;

[0024] Figure 2 This diagram shows the connection structure between the movable frame and the experimental ship model.

[0025] In the diagram, 1. Pool boundary; 2. Onshore fixed frame; 3. Wire rope; 4. Winch; 5. Moving frame; 6. Cable guide hole; 7. Guide rail; 8. Traction hook; 9. Test boat model; 10. Clamping mechanism; 11. Test plate; 12. Sensor; 13. Speed ​​measuring instrument; 14. Photoelectric switch. Detailed Implementation

[0026] To further understand the present invention, embodiments of the present invention are described below in conjunction with examples. However, it should be understood that these descriptions are only for further illustrating the features and advantages of the present invention, and not for limiting the present invention.

[0027] An embodiment of the present invention discloses a ship collision test system, such as Figure 1 It includes: shore-based fixed frame 2, steel wire rope 3, winch 4, moving frame 5, guide rail 7, test boat model 9, sensor 12, speed measuring instrument 13, and control unit;

[0028] Two fixed supports 2 are installed on the front and back banks of the pool 1, and a guide rail 7 is installed between the two fixed supports 2 on the same side.

[0029] The shore-based fixed frame 2 is equipped with a winch 4. The front winch 4 is used to pull the steel wire rope in the forward direction, which is used to drive the moving frame 5 to accelerate along the guide rail. The rear winch 4 is used to pull the steel wire rope in the reverse direction, which is used to decelerate the moving frame 5 after the test ship model 9 has completed acceleration, and to pull the moving frame 5 back to the original point after the test is completed for the next test.

[0030] The mobile frame 5 spans both banks of the pool 1, with its two ends connected to the guide rails 7 respectively, and is pulled by the steel wire rope 3 to move on the guide rails 7;

[0031] Specifically, the bottom of the movable frame 5 is provided with rollers, which are in contact with the guide rail. The movable frame 5 can move along the direction of the guide rail 7 under the action of traction force.

[0032] The mobile frame 5 is provided with cable guide holes 6 at both ends. The steel wire rope 3 passes through the cable guide holes 6 to connect the winch 4 and the mobile frame 5 together.

[0033] All wire ropes 3 between winches 4 and moving frame 5 are parallel to guide rails 7.

[0034] The experimental boat model 9 is movably connected to the movable frame 5 in the middle and moves within the water tank;

[0035] The test ship model 9 and the movable frame 5 are connected by a towing hook 8. The movable frame 5 and the test ship model 9 are connected and separated by the towing hook 8. Figure 2 As shown;

[0036] The test boat model 9 is equipped with a speed measuring instrument 13. When the speed of the test boat model 9 reaches the set value, the forward traction stops and the reverse traction starts. The moving frame decelerates under the action of the reverse traction force until it stops. At this time, the test boat model 9 is separated from the moving frame 5. When the test boat model 9 collides with the test plate 11, the speed measuring instrument 13 will record the actual speed value of the test boat model 9 at the moment of the collision.

[0037] The test plate 11 is installed inside the water tank 1. A dynamic data acquisition sensor 12 is installed on the back of the test plate 11 to collect relevant data of the test plate 11 after the test ship model 9 collides with the test plate 11.

[0038] The test plate 11 is fixed by a clamping mechanism 10, which is used to clamp and fix the test plate 11 in the middle of the water tank. The clamping mechanism 10 is composed of a vertical frame.

[0039] The control unit receives signals from the speed measuring instrument and controls the traction direction and traction speed of the winch.

[0040] To protect the shore-based fixed and mobile frames in the test system and prevent them from colliding and breaking during the test, buffer pads and photoelectric switches are used for related control and protection.

[0041] A buffer pad is installed on the inner side of the shore-based fixed frame 2. When the moving frame 5 moves to the shore-based fixed frame 1 at a certain speed, it first interacts with the buffer pad to slow down and stop. This prevents it from directly interacting with the shore-based fixed frame 2 and causing damage to both.

[0042] To protect the shore-based fixed frame 2, a photoelectric switch 14 is installed near the front end of the shore-based fixed frame 2. The control circuit of the photoelectric switch 14 is connected to the circuit of the winch 4. Once the moving frame 5 reaches the position of the photoelectric switch under the traction of the winch 4, the forward traction circuit will be immediately de-energized, and the reverse traction circuit will start working. At this time, the moving frame 5 decelerates until it stops.

[0043] The present invention also discloses a ship collision test method, which utilizes the ship collision test system described above to conduct the test, including the following steps:

[0044] First, start forward traction to accelerate the model ship to the predetermined speed; when the model ship reaches the predetermined speed, stop forward traction and at the same time, reverse traction to decelerate the moving frame until it stops. At this time, the test model ship separates from the moving frame under the action of inertia.

[0045] The test ship model continued to move forward at a certain speed and completed the collision process with the test plate. The speed measuring instrument obtained the speed value of the ship model at the moment the collision began; at the same time, the data acquisition sensor on the back of the test plate recorded the test data throughout the collision process.

[0046] The above description of the embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0047] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A ship collision test system, characterized in that, include: Onshore fixed frame, wire rope, winch, mobile frame, guide rail, test ship model, sensor, speed measuring instrument, control unit; Two fixed supports are installed on the banks of the pool, one at the front and one at the back, and winches are mounted on the fixed supports. Guide rails are installed between the two shore-based fixed frames on the same side. The mobile frame spans both sides of the pool, with its two ends connected to guide rails and moved by steel wire ropes. The test boat model is movably connected to the middle of the mobile frame and moves within the water tank; a speed measuring instrument is installed inside the test boat model. The pool contains a test plate, and a dynamic data acquisition sensor is installed on the back of the test plate to collect relevant data of the test plate after the test ship model collides with it. The control unit receives signals from the speed measuring instrument and controls the traction direction and traction speed of the winch.

2. The ship collision test system according to claim 1, characterized in that, The mobile frame is provided with cable guide holes at both ends, and the wire rope passes through the cable guide holes to connect the winch and the mobile frame together.

3. The ship collision test system according to claim 1, characterized in that, The test plate is fixed by a clamping mechanism.

4. The ship collision test system according to claim 3, characterized in that, The clamping mechanism consists of a vertical frame.

5. The ship collision test system according to claim 1, characterized in that, The test ship model and the mobile frame are connected by a towing hook.

6. The ship collision test system according to claim 1, characterized in that, A photoelectric switch is installed near the front end of the shore-based fixed frame. The control circuit of the photoelectric switch is connected to the circuit circuit of the winch. Once the moving frame reaches the position of the photoelectric switch under the traction of the winch, the forward traction circuit is immediately de-energized, and the reverse traction circuit starts working, causing the moving frame to decelerate until it stops.

7. The ship collision test system according to claim 1, characterized in that, The winch at the front end is used to pull the wire rope in the forward direction, and the winch at the rear end is used to pull the wire rope in the reverse direction.

8. The ship collision test system according to claim 1, characterized in that, A buffer pad is installed on the inside of the shore-based fixed frame.

9. The ship collision test system according to claim 1, characterized in that, The bottom of the mobile frame is equipped with rollers, which contact the guide rail and move along the guide rail.

10. A method for ship collision testing, characterized in that, The test using the ship collision test system according to any one of claims 1 to 9 includes the following steps: First, start forward traction to accelerate the model ship to the predetermined speed; when the model ship reaches the predetermined speed, stop forward traction and at the same time, reverse traction to decelerate the moving frame until it stops. At this time, the test model ship separates from the moving frame under the action of inertia. The test ship model continued to move forward at a certain speed and completed the collision process with the test plate. The speed measuring instrument obtained the speed value of the ship model at the moment the collision began; at the same time, the data acquisition sensor on the back of the test plate recorded the test data throughout the collision process.

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