A simulation model for hydrodynamic calculation of full-rotating twin-propeller ship

Abstract

The application relates to the technical field of calculation simulation of ship hull propulsion research, in particular to a simulation model convenient for hydrodynamic calculation of a full-rotation double-propeller ship, which comprises a plurality of groups of water pressure sensors arranged on the circular arc outer wall of a detection column and facing openings, a drainage long groove arranged on the circular arc outer wall of the detection column and located at the openings, a water inlet pipe of an external water pump assembly arranged in the detection column, and a lifting port arranged at one end of the water inlet pipe and capable of sliding along the drainage long groove to adjust the height, wherein the beneficial effects are that the water flow direction and flow rate in the pool model are accurately controlled through water pumping and high-pressure water inflow in the symmetrical direction, the data detection range of the test is improved, the simulation equipment provided with the water pressure sensors and the displacement sensors is arranged, so that the data in the test process can be conveniently collected, the position of the simulation small ship can be accurately collected through the coordinates established by the transparent grid plates, and the test accuracy is greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of computational simulation of ship hull propulsion, in particular to a simulation model facilitating hydrodynamic calculation of a full-rotation twin-propeller ship. BACKGROUND

[0002] More and more naval vessels are equipped with twin azimuth thrusters. These ships are suitable for working in restricted waters, such as rescue ships, near-shore ships, supply ships and cruisers. However, since the ship is maneuvered by azimuth thrusters, its maneuverability is obviously different from that of a traditional ship driven by a rudder and a propeller. At the same time, due to the obvious interaction between the two azimuth thrusters, the complex hydrodynamic effects and the significant influence on the ship's maneuverability.

[0003] In a common data research process related to ship hull propulsion, a simulation environment is usually set up for data testing and collection. A large water area, such as a lake, is usually selected as a test site, and then a designed thruster is installed on a simulation ship for performance testing.

[0004] However, the test range of such a natural environment lake is limited, and the water flow and wind speed have little influence on the ship, making it difficult to collect and compare data. Moreover, the environmental impact is uncontrollable, and since the natural environment site is too large, intelligent navigation maps and other equipment are needed for data collection during the simulation process, which is not accurate. SUMMARY

[0005] The present application aims to provide a simulation model facilitating hydrodynamic calculation of a full-rotation twin-propeller ship to solve the problems raised in the background.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solutions.

[0007] A simulation model facilitating hydrodynamic calculation of a full-rotation twin-propeller ship, comprising a model frame, a water pool model for simulating a water pool environment is arranged on the model frame, a simulation boat is arranged on the liquid surface of the water pool model, the simulation boat is a simulation ship driven by a pair of twin thrusters, a plurality of groups of installation vertical grooves are arranged on the circular arc inner wall of the water pool model in a circumferential array, an opening communicating with the water pool model is arranged on one side of the installation vertical groove, a detection column is inserted and installed in the installation vertical groove, a plurality of groups of water pressure sensors are arranged on the circular arc outer wall of the detection column opposite the opening, a drainage long groove is arranged on the circular arc outer wall of the detection column at the opening, a water inlet pipe of an external water pump assembly is arranged in the detection column, and a lifting port capable of sliding and adjusting the height along the drainage long groove is arranged at one end of the water inlet pipe.

[0008] The upper end of the model frame is provided with a transparent grid plate covering the water pool model, the upper end of the simulation boat is provided with position sensors at the head and tail and the middle position, and the position sensors are provided with response probes vertically corresponding to the intersecting grid points of the transparent grid plate.

[0009] Preferably, the water pump assembly comprises water suction pumps and water discharge pumps arranged in a circumferential array along the outer side of the water pool model, the water suction pumps and the water discharge pumps are installed on the rotating frame, and the water suction pumps and the water discharge pumps are connected through a communication bend pipe surrounding the outer side of the water pool model.

[0010] Preferably, the water suction pumps and the water discharge pumps are symmetrically arranged, and the upper end is provided with a multi-interface connector connected through a hose, the multi-interface connector is provided with a plurality of connection interfaces, and the plurality of connection interfaces can connect the water inlet pipes on the detection columns of a plurality of adjacent positions.

[0011] Preferably, the upper end of the installation vertical groove is provided with a stepped groove, and the upper end of the detection column is provided with a floating plate located in the stepped groove, and the detection column can be suspended in the water under the action of the floating plate.

[0012] Preferably, the water inlet pipe slides through the floating plate, and the water inlet pipe is provided in multiple groups, the upper end ports of the multiple groups of water inlet pipes are connected to the water collecting plate, the upper end of the water collecting plate is provided with a water inlet connected to the water pump assembly, the water inlet is connected to the water inlet pipe, and the water collecting plate is provided with a plurality of through holes opposite to the upper end ports of the water inlet pipes, and a detachable sealing plug is installed in the through hole.

[0013] Preferably, the detection column is vertically provided with a telescopic rod away from the inlet, the upper end of the telescopic rod slides through the floating plate, the upper end of the telescopic rod is connected to the water collecting plate through an ear seat, the floating plate is provided with a data interface, and the data interface is electrically connected to a plurality of water pressure sensors.

[0014] Preferably, the stepped groove is provided with a plurality of positioning screw holes arranged in a circumferential array, the floating plate is provided with a plurality of through holes corresponding to the positioning screw holes, a positioning screw rod is inserted and connected through the through hole, and the lower end of the positioning screw rod is threadedly rotatably installed in the positioning screw hole.

[0015] Preferably, the lower end of the rotating frame is provided with a lower rotating block rotatably installed through a bearing, the model frame is provided with a lower rotating groove matched with the lower rotating block, the model frame is provided with a positioning hole, and the lower end of the water pool model is provided with a positioning column inserted into the positioning hole.

[0016] Preferably, one side of the model frame is provided with a side frame, one side of the transparent grid plate is installed on the side frame, a display screen covering the transparent grid plate is vertically installed on the upper end of the side frame, light sources are arranged on the intersecting grid points of the transparent grid plate and irradiate on the display screen, and the display screen is used to display the trajectories of a plurality of intersecting grid points responding to the irradiation in sequence.

[0017] Preferably, the lower end of the detection column is provided with a counterweight ball connected by an elastic pull rope, the lower end of the installation vertical groove is provided with a lower ball groove, and the counterweight ball is arranged in the lower ball groove.

[0018] Compared with the prior art, the present application has the following beneficial effects:

[0019] The present application cooperates the detection column with the water inlet pipe and the water pump assembly with adjustable circumferential angle, so as to accurately control the water flow direction and flow rate in the pool model through symmetrical water pumping and high-pressure water inlet, improve the data detection range of the test, and set the simulation equipment with the water pressure sensor and the displacement sensor, so as to conveniently collect the data in the test process, cooperate the coordinates established by the transparent grid plate, accurately collect the position of the simulation small boat, and greatly improve the accuracy of the test. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the detection column of the present application;

[0021] Figure 2 It is a schematic diagram of the structure of the present application;

[0022] Figure 3 It is a top view of the pool model of the present application;

[0023] Figure 4 It is a schematic diagram of the three-dimensional structure of the installation of the water inlet pipe on the detection column of the present application;

[0024] Figure 5 It is a schematic diagram of the structure of the simulation small boat of the present application;

[0025] Figure 6 It is a schematic diagram of the three-dimensional structure of the height adjustment of the water inlet pipe of the present application;

[0026] Figure 7 It is a schematic diagram of the three-dimensional structure of the water pump assembly of the present application.

[0027] In the figure: 1, model frame; 2, pool model; 3, installation vertical groove; 4, lower turning groove; 5, turning frame; 6, drainage pump; 7, water pump; 8, hose; 9, multi-interface connector; 10, side frame; 11, transparent grid plate; 12, display screen; 13, communication elbow; 14, lower turning block; 15, positioning hole; 16, positioning column; 17, simulation small boat; 18, detection column; 19, step groove; 20, positioning screw hole; 21, water pressure sensor; 22, drainage long groove; 23, water inlet pipe; 24, lower ball groove; 25, counterweight ball; 26, telescopic rod; 27, data interface; 28, floating plate; 29, through hole; 30, lifting port; 31, water inlet; 32, ear seat; 33, sealing plug; 34, bus plate; 35, position sensor; 36, propeller; 37, positioning screw. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0029] Please refer to Figures 1 to 7 The present application provides a technical solution:

[0030] Embodiment 1: A simulation model for facilitating hydrodynamic calculation of a full-rotation double-propeller ship, comprising a model frame 1, wherein a water pool model 2 for simulating a water pool environment is arranged on the model frame 1, so as to form a static water surface environment.

[0031] A simulation boat 17 is arranged on the liquid surface of the water pool model 2, and the simulation boat 17 is a simulation ship driven by a pair of double propellers 36, and is used for simulating a small boat driven by double propellers.

[0032] A plurality of groups of installation vertical grooves 3 are arranged in a circumferential array on the inner arc wall of the water pool model 2, one side of the installation vertical grooves 3 is provided with an opening communicating with the water pool model 2, a detection column 18 is inserted and installed in the installation vertical grooves 3, a plurality of groups of water pressure sensors 21 are arranged on the arc outer wall of the detection column 18 and face the opening, a drainage long groove 22 is arranged on the arc outer wall of the detection column 18 and is located at the opening, a water inlet pipe 23 of an external water pump assembly is arranged in the detection column 18, and one end of the water inlet pipe 23 is provided with a lifting port 30 which can slide and adjust the height along the drainage long groove 22.

[0033] By arranging the water pump assemblies for symmetrically distributing water pumping and water inlet, the flow velocity in the water pool model 2 is controlled, the propelling driving conditions of the simulation boat 17 under the action of different water flows are realized, the height adjustment is utilized to simulate the underwater undercurrent, the range of simulation is further improved, and the reaction force of the driving equipment on the water flow under the driving state is detected by the water pressure sensors 21.

[0034] The upper end of the model frame 1 is provided with a transparent grid plate 11 covering the water pool model 2, the upper end of the simulation boat 17 is provided with position sensors 35 at the head-tail and middle positions, and the position sensors 35 are provided with response probes vertically corresponding to the intersecting grid points of the transparent grid plate 11.

[0035] By arranging the transparent grid plate 11 and the position sensors 35, the position and movement trajectory of the simulation boat 17 during the driving process are conveniently collected, the coordinates are conveniently established, and the driving states such as turning and deflection of the simulation boat 17 are collected.

[0036] Working principle: first put the simulation boat 17 in the static water pool model 2, then install the detection column 18 in the circumferential array in the pool model 2:

[0037] 1. In the state of no water, test the simulation boat 17 on the static water surface by the propeller 36;

[0038] 2. By the water pump assembly, simulate the propeller 36 under the impact of water flow on the simulation boat 17, control the water flow pressure by the water pump assembly, simulate the environment under different water pressures, adjust the circumferential angle of the water pump assembly to simulate the environment under different water pressure impact angles, and detect the reaction force of the propeller 36 on the water flow under the driving state by the water pressure sensor 21;

[0039] 3. By setting the position sensor 35 and the transparent grid plate 11 intersection grid, the position of the simulation boat 17 under the driving state can be established coordinates, and the motion trajectory, rotation angle and other data can be clearly collected, which improves the convenience of data collection.

[0040] Among them, the water pressure sensor 21, displacement sensor 35, propeller 36 and response probe on the intersection grid of transparent grid plate 11 are common technologies in the art, which are not described in detail.

[0041] Example 2: based on example 1, the water pump assembly includes water pump 7 and drainage pump 6 distributed in circumferential array along the outside of pool model 2, water pump 7 and drainage pump 6 are installed on rotating frame 5, water pump 7 and drainage pump 6 are connected by communication bend pipe 13 around the outside of pool model 2, water pump 7 and drainage pump 6 are symmetrically distributed, and the upper end is provided with multi-interface connector 9 connected by hose 8, multi-interface connector 9 is provided with multiple connection interfaces, and multiple connection interfaces can connect multiple groups of adjacent position detection column 18 on the water inlet pipe 23; the lower end of rotating frame 5 is provided with lower rotating block 14 rotatingly installed, model frame 1 is provided with lower rotating groove 4 cooperating with lower rotating block 14, model frame 1 is provided with positioning hole 15, and the lower end of pool model 2 is provided with positioning column 16 inserted into positioning hole 15.

[0042] Through the cooperation of lower rotating groove 4 and lower rotating block 14, the circumferential angle adjustment of water pump assembly is realized, the internal water flow circulation is formed by water pump 7 and drainage pump 6, the accurate position correspondence between pool model 2 and transparent grid plate 11 is ensured by the cooperation of positioning hole 15 and positioning column 16, the range of water inlet and water pumping is improved by controlling the number of connection interfaces of multi-interface connector 9, and the strength and range of water flow effect are improved.

[0043] The upper end of the installation vertical groove 3 is provided with a stepped groove 19, the upper end of the detection column 18 is provided with a floating plate 28 located in the stepped groove 19, the detection column 18 can be suspended in water under the action of the floating plate 28, the lower end of the detection column 18 is provided with a counterweight ball 25 connected by an elastic pull rope, the lower end of the installation vertical groove 3 is provided with a lower ball groove 24, the counterweight ball 25 is arranged in the lower ball groove 24, the stepped groove 19 is provided with a plurality of groups of positioning screw holes 20 distributed in a circular array, the floating plate 28 is provided with a plurality of groups of through holes 29 corresponding to the positioning screw holes 20, the positioning screw rod 37 is slidably inserted into the through hole 29, and the lower end of the positioning screw rod 37 is threadedly rotatably arranged in the positioning screw hole 20.

[0044] The position of the detection column 18 is limited by the lower ball groove 24 and the installation vertical groove 3, the detection column 18 is kept in a floating state upward by the floating plate 28, and the detection column 18 is prevented from being deflected in the installation vertical groove 3 by the cooperation of the positioning screw rod 37 and the positioning screw hole 20, so that the installation position, the installation height and the installation angle of the detection column 18 are limited, and the suspended state of the detection column 18 is ensured.

[0045] The water inlet pipe 23 slidably penetrates the floating plate 28, and the water inlet pipe 23 is arranged in a plurality of groups. The upper end ports of the plurality of groups of water inlet pipes 23 are communicated with the bus plate 34. The upper end of the bus plate 34 is provided with a water inlet 31 connected with a water pump assembly. The water inlet 31 is communicated with the water inlet pipe 23, and the bus plate 34 is provided with a plurality of through holes opposite to the upper end ports of the water inlet pipes 23. The through holes are provided with detachable sealing plugs 33.

[0046] The detachable sealing plug 33 is arranged, so that when the height of the water inlet pipe 23 is adjusted, the sealing plug 33 is opened, so that the upper end port of the water inlet pipe 23 is communicated with the atmosphere, the liquid level is flush with the liquid level of the pool model 2, and overflow is avoided. The bus plate 34 is arranged to realize the flow communication of the plurality of groups of water inlet pipes 23.

[0047] The detection column 18 is vertically provided with an extension rod 26 away from the opening side. The upper end of the extension rod 26 slidably penetrates the floating plate 28. The upper end of the extension rod 26 is connected with the bus plate 34 through an ear seat 32. The floating plate 28 is provided with a data interface 27. The data interface 27 is electrically connected with a plurality of water pressure sensors 21. One side of the model frame 1 is provided with a side frame 10. One side of the transparent grid plate 11 is arranged on the side frame 10. The upper end of the side frame 10 is vertically provided with a display screen 12 covering the transparent grid plate 11. The transparent grid plate 11 is provided with a light source irradiating on the display screen 12 at the intersection points. The display screen 12 is used for displaying the trajectories of the plurality of groups of intersection points responding to the irradiation in sequence.

[0048] Through setting the connection of the water pressure sensor 21 and the data interface 27, the data of the sensor can be collected and arranged, and the display screen 12 is used to display the motion track of the simulation boat 17, so that the data collection efficiency is further improved.

[0049] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A simulation model facilitating the hydrodynamic calculation of a full-rotation twin-propeller ship, comprising a model frame (1) provided with a water tank model (2) for simulating a water tank environment, a water surface of the water tank model (2) being provided with a simulation boat (17), the simulation boat (17) being a simulation ship driven by a pair of double propellers (36), characterized in that: a plurality of groups of installation vertical grooves (3) are arranged in a circumferential array on the inner arc wall of the water tank model (2), one side of the installation vertical grooves (3) is provided with an opening communicating with the water tank model (2), a detection column (18) is inserted and installed in the installation vertical grooves (3), a plurality of water pressure sensors (21) are arranged on the outer arc wall of the detection column (18) and face the opening, a drainage long groove (22) is arranged on the outer arc wall of the detection column (18) and located at the opening, a water inlet pipe (23) of an external water pump assembly is arranged in the detection column (18), one end of the water inlet pipe (23) is provided with a lifting port (30) capable of sliding along the drainage long groove (22) to adjust the height; a transparent grid plate (11) is arranged on the upper end of the model frame (1) and covers the water tank model (2), position sensors (35) are arranged at the head and tail and the middle position of the upper end of the simulation boat (17), and a response probe vertically corresponding to the intersecting grid points of the transparent grid plate (11) is arranged on the position sensor (35). The water pump assembly comprises water suction pumps (7) and drainage pumps (6) arranged in a circumferential array on the outer side of the water tank model (2), the water suction pumps (7) and the drainage pumps (6) are installed on a rotating frame (5), and the water suction pumps (7) and the drainage pumps (6) are communicated through a communication bend pipe (13) surrounding the outer side of the water tank model (2).

2. The analog model for facilitating hydrodynamic calculation of a full-rotating twin-propeller ship according to claim 1, wherein: The water suction pumps (7) and the drainage pumps (6) are symmetrically distributed, and the upper ends are provided with a multi-interface connector (9) connected through a hose (8), the multi-interface connector (9) is provided with a plurality of connection interfaces, and the plurality of connection interfaces can communicate the water inlet pipes (23) on the detection columns (18) in a plurality of adjacent positions.

3. The analog model for facilitating hydrodynamic calculation of a full-azimuth twin-propeller ship according to claim 2, wherein: The upper end of the installation vertical groove (3) is provided with a stepped groove (19), the upper end of the detection column (18) is provided with a floating plate (28) located in the stepped groove (19), and the detection column (18) can be suspended in water under the action of the floating plate (28).

4. The analog model for facilitating hydrodynamic calculation of a full-azimuth twin-propeller ship according to claim 1, wherein: The water inlet pipe (23) slides through the floating plate (28), and the water inlet pipe (23) is provided in multiple groups, the upper end ports of the multiple groups of water inlet pipes (23) are communicated with a bus bar (34), the upper end of the bus bar (34) is provided with a water inlet (31) of an external water pump assembly, the water inlet (31) is communicated with the water inlet pipe (23), a plurality of through holes opposite the upper end ports of the water inlet pipes (23) are arranged on the bus bar (34), and a detachable sealing plug (33) is installed in the through hole.

5. The analog model for facilitating hydrodynamic calculation of a full-azimuth twin-propeller ship according to claim 4, characterized in that: ​ 6. The analog model for facilitating hydrodynamic calculation of a full-azimuth twin-propeller ship according to claim 5, wherein: The detection column (18) is vertically provided with a telescopic rod (26) away from the side of the outlet, the upper end of the telescopic rod (26) is slidably penetrated through the floating plate (28), the upper end of the telescopic rod (26) is connected with the bus plate (34) through the lug seat (32), the floating plate (28) is provided with a data interface (27), and the data interface (27) is electrically connected with multiple groups of water pressure sensors (21).

7. The analog model for facilitating hydrodynamic calculation of a full-azimuth twin-propeller ship according to claim 6, characterized in that: The stepped groove (19) is provided with multiple groups of positioning screw holes (20) distributed in a circular array, the floating plate (28) is provided with multiple groups of through holes (29) corresponding to the positioning screw holes (20), the positioning screw rods (37) are slidably penetrated and connected in the through holes (29), and lower ends of the positioning screw rods (37) are threadedly rotatably installed in the positioning screw holes (20).

8. The analog model for facilitating hydrodynamic calculation of a full-azimuth twin-propeller ship according to claim 3, wherein: The lower end of the rotating frame (5) is provided with a lower rotating block (14) rotatably installed through a bearing, the model frame (1) is provided with a lower rotating groove (4) rotatable in cooperation with the lower rotating block (14), the model frame (1) is provided with a positioning hole (15), and the lower end of the pool model (2) is provided with a positioning column (16) inserted into the positioning hole (15).

9. The analog model for facilitating hydrodynamic calculation of a full-azimuth twin-propeller ship according to claim 1, wherein: One side of the model frame (1) is provided with a side frame (10), one side of the transparent grid plate (11) is installed on the side frame (10), the upper end of the side frame (10) is vertically installed with a display screen (12) covering the transparent grid plate (11), the intersection points of the transparent grid plate (11) are provided with light sources irradiating on the display screen (12), and the display screen (12) is used for displaying the trajectories of multiple groups of intersection points responding to irradiation in sequence.

10. The analog model for facilitating hydrodynamic calculation of a full- azimuth twin screw vessel according to claim 4, wherein: The lower end of the detection column (18) is provided with a counterweight ball (25) connected through an elastic pull rope, the lower end of the installation vertical groove (3) is provided with a lower ball groove (24), and the counterweight ball (25) is arranged in the lower ball groove (24).

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