WO2018016679A1

WO2018016679A1 - Model ship wind load measuring device

Info

Publication number: WO2018016679A1
Application number: PCT/KR2016/011655
Authority: WO
Inventors: 홍장표; 조석규; 김영식; 성홍근; 원영욱; 박인보; 김진하; 홍석원
Original assignee: 한국해양과학기술원
Priority date: 2016-07-18
Filing date: 2016-10-17
Publication date: 2018-01-25
Also published as: KR101857040B1; KR20180009152A

Abstract

The present invention relates to a model ship wind load measuring device. The model ship wind load measuring device according to the present invention is configured to measure the wind load on a model ship (1) in a test basin through a load cell (10). Electric train rails (R) are installed on the upper portion of the test basin so as to provide support force and to provide a path of leftward/rightward movement of the mode ship (1). A moving electric train (100) is movably coupled to the electric train rails (R) and is connected to the model ship (1) so as to move the model ship (1) horizontally. A model ship support frame (200) is connected to the moving electric train (100) and is connected to the model ship (1) so as to support the model ship (1). The model ship support frame (200) and the moving electric train (100) are connected by a draft varying unit (500). The draft varying unit (500) plays the role of varying the height of the model ship support frame (200) such that the draft of the model ship (1) can be adjusted. The draft varying unit (500) and the rotating unit (800) are controlled by a controller. The draft varying unit (500) has a push arm (700) formed in the shape of a rod, and the push arm (700) has a cylinder (720) formed in a streamlined shape. The present invention, configured as above, is advantageous in that an environment external force, such as a wind, is provided to the model ship with a minimized interference by the draft varying unit, making it possible to accomplish the accurate test condition.

Description

Model ship wind load measuring device

The present invention relates to a model ship wind load measuring apparatus, and more particularly, it is possible to minimize the interference by the wall in the process of measuring the wind load of the model ship through the load cell in the test tank, and accurately measured in the state of draft control of the model ship It relates to a model ship wind load measurement device configured to be able to.

In general, marine vehicles such as ships and submarines have the same shape as solid lines in test sites, such as towing tanks, and perform performance tests on reduced model ships to identify fluid performance in various situations.

One of the performance tests, the DP (Dynamic Position) test, requires the wind load conditions of the model ship to be met, which requires a method for measuring the wind load.

For reference, the wind load refers to a load generated on the model ship by the wind when the wind hits an object, that is, the model ship. Usually, wind wind acting on an artificial structure, such as a building, is often referred to as wind load, and is a term commonly used when conscious of wind design of a structure (耐風設計).

However, most of the wind load measurement made in the conventional marine engineering tank is installed a 'b' shaped wall inside the tank as described above to hang the model ship on the wall, and then load cell (load cell) to the model ship Since the wind load on the model ship was measured and installed, there is a problem that disturbance and scattering of the environmental external force may occur due to the influence of interference by the wall when generating the environmental external force.

That is, the conventional wind load measurement does not provide accurate test conditions because the wind is not transmitted directly to the model ship and is transmitted in an interference state by the wall.

Therefore, there is a need for an apparatus capable of accurate measurement by ensuring that external force such as wind provided is properly transmitted to the model ship without being interfered by walls.

The present invention has been invented to improve the above problems, the problem to be solved by the present invention, it is possible to perform a more accurate wind load measurement by minimizing the interference by the draft variable unit during generation of environmental external force such as wind It is to provide a model ship wind load measurement device.

In order to achieve the above object, the model ship wind load measuring apparatus according to an embodiment of the present invention, the wind load measuring device of the model ship for measuring the wind load of the model ship in the test tank through the load cell, is installed on the test tank upper A tram rail providing a left and right movement path of the model ship; A mobile tank connected to the model ship in a state of being coupled to the tram rail to move the model ship horizontally; A model ship support frame supporting the model ship while being connected to the mobile tank; A rotation unit installed on the model ship support frame and adjusting the direction of the model ship according to wind load measurement conditions while coupling the load cell to the model ship support frame; A draft variable unit which connects the model ship supporting frame and the mobile tank and varies the height of the model ship supporting frame so that the draft of the model ship can be adjusted; And it characterized in that it comprises a controller for controlling the draft variable unit and the rotating unit.

The variable draft unit is provided on both sides of the model ship support frame to provide a buoyancy buoyancy, and is formed to extend vertically from the mobile tank toward the test tank, respectively connected to both sides of the model ship support frame Pressing the model ship support frame toward the water, characterized in that consisting of a push arm is variable in length to adjust the buoyancy of the buoyancy tank.

The push arm is fixed to the mobile tank and the one side is fastened and the other side extends vertically toward the model ship support frame, the other side of the holder and the model ship support frame elastically, the control of the controller It is characterized by consisting of a cylinder which is provided by a piston to operate by varying in length and pressurize the model ship support frame to move vertically.

The model ship support frame, the main frame for providing an installation space so that the rotation unit is installed in the center, and is formed to extend in a direction away from each other by being fastened to both sides of the main frame, respectively, the draft variable unit is installed on both sides It is characterized by consisting of a side frame.

The main frame is characterized in that the support is provided to be supported on the bottom surface of the test tank in the state in which the side frame is separated.

The rotation unit is detachably coupled to the model ship support frame, the load cell housing on which the load cell is mounted, and rotatably installed on the load cell housing, and the model ship is seated on an upper surface of the model ship in the direction of the ship model. It is provided with a seating pad for adjusting the load cell housing, providing a rotational force to the load cell and the seating table, a rotator controlled by the controller, and provides a coupling space to which the load cell housing is coupled, the height of the rotator It is characterized in that the air piston is operated by the control of the controller to adjust the lift is configured to selectively adhere the rotator toward the seat.

The upper edge of the seating is characterized in that a plurality of clamps for fastening the model ship on the seating is provided.

Specific details of other embodiments are included in the detailed description and the drawings.

According to the model ship wind load measurement apparatus according to an embodiment of the present invention, the push arm of the variable draft unit connecting the mobile tank and the model ship support frame is formed in the shape of a rod, the cylinder of the push arm is formed in a streamline to wind and The same environmental external force is provided to the model ship with the interference by the draft variable unit minimized. Therefore, accurate test conditions can be achieved, and disturbance and scattering of environmental force can be prevented.

In addition, according to the model ship wind load measurement apparatus according to an embodiment of the present invention, the wind load using only the main frame provided with a support so that it can be supported on the bottom of the test tank without the need for a mobile tank at a low depth in one space At deep water depths, wind loads can be measured using sideframes and draft variable units provided on both sides of the mainframe. Therefore, since the model line does not need to be moved to another space according to the depth, space utilization can be improved and time can be saved.

The effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is a perspective view showing the configuration of a model ship wind load measurement apparatus according to an embodiment of the present invention.

2 is a perspective view illustrating a state in which a model ship is disposed in a model ship wind load measuring apparatus according to an exemplary embodiment of the present invention.

3 is a perspective view showing the configuration of a model ship support frame according to an embodiment of the present invention.

Figure 4 is a perspective view showing a portion of the model line support frame according to an embodiment of the present invention.

5 is a perspective view showing a part of the configuration of the draft variable unit according to an embodiment of the present invention.

6 and 7 are partial cross-sectional views showing the operating state of the variable draft unit according to an embodiment of the present invention.

8 is a perspective view showing a state in which the rotating unit is coupled to the support frame according to an embodiment of the present invention.

9 is a perspective view showing a part of the configuration of the rotating unit according to an embodiment of the present invention.

10 is a perspective view showing a part of the configuration of the rotating unit according to an embodiment of the present invention.

11 is a perspective view showing a state in which a model ship is disposed in a rotating unit according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings such that those skilled in the art may easily implement the present invention.

In describing the embodiments, descriptions of technical contents which are well known in the technical field to which the present invention belongs and are not directly related to the present invention will be omitted. This is to more clearly communicate without obscure the subject matter of the present invention by omitting unnecessary description.

For the same reason, in the accompanying drawings, some components are exaggerated, omitted or schematically illustrated. In addition, the size of each component does not fully reflect the actual size. The same or corresponding components in each drawing are given the same reference numerals.

1 is a perspective view of a model ship wind load measuring apparatus according to an embodiment of the present invention, Figure 2 is a perspective view showing a state in which the model ship is arranged in the model ship wind load measuring apparatus according to an embodiment of the present invention. It is.

1 and 2, the model ship wind load measuring apparatus measures the wind load of the model ship 1 through a load cell 10 in a test tank (not shown).

To this end, as shown in Figures 1 and 2, the upper portion of the test tank, the tram rail (R) providing a supporting force is installed. The tram rail R serves to provide the left and right movement paths of the model line 1.

As shown in Figure 1 and 2, the tram rail (R) is coupled to the mobile tank 100. The mobile tram 100 is connected to the model ship 1 in a state that is movably coupled to the tram rail R to serve to horizontally move the model ship 1.

The model ship support frame 200 is connected to the mobile tank 100 by a draft variable unit 500 to be described below. The model ship supporting frame 200 supports the model ship 1 in a state connected to the mobile tank 100.

As shown in FIGS. 1 and 2, the model ship supporting frame 200 includes a main frame 300 on which the model ship 1 is disposed, and side frames fastened to both sides of the main frame 300, respectively. It consists of 400.

As shown in FIG. 3, the main frame 300 has a substantially hexahedral shape, and an installation space in which a rotating unit 800 to be described below is installed is formed at the center thereof.

The connecting member 310 is coupled to each corner of the main frame 300. The connection member 310 serves to connect the main frame 300 and the side frame 400.

A plurality of insertion holes 312 are formed in the connection member 310. The insertion hole 312 is intended to allow one end of the main frame 300 and the side frame 400 to be connected to each other by the connection member 310.

In the present embodiment, the main frame 300 may be provided with a support 320, as shown in Figs. The support 320 serves to support the main frame 300 on the bottom surface of the test tank in a state in which the side frame 400 is separated from the main frame 300. This is to measure without the tram 100 when the water depth is low.

Although not shown in the upper portion of the main frame 300 is provided with a dustproof rubber pad. The anti-vibration rubber pad is a seating portion 820 of the rotary unit 800 to be described below, and absorbs the vibration transmitted from the outside serves to prevent disturbance and scattering of environmental external force.

As shown in FIG. 3, the side frame 400 is formed to extend in a direction away from each other from both sides of the main frame 300. The side frame 400 is connected to the main frame 310 by the connection member 310.

Both sides of the upper side of the side frame 400 is provided with a fastening rod 420 is fastened to the draft variable unit 500 to be described below. The fastening rods 420 extend in a direction perpendicular to a direction in which the side frame 400 extends.

On the other hand, as shown in Figure 1 or 2, a variable draft unit 500 is installed between the fastening rod 420 of the side frame 400 and the mobile tank 100. The draft variable unit 500 is intended to be supported by connecting the model ship support frame 200 to the mobile tank 100. This is to connect the model line support frame 200 to the mobile tank 100 so that the model line 1 is supported when the depth is deep.

In addition, the draft variable unit 500 serves to vary the height of the model ship support frame 200 so that the draft of the model ship (1) can be adjusted. To this end, the odd variable unit 500, as shown in Figures 1 and 2, the buoyancy tank 500 to provide a buoyancy, push the variable length so that the buoyancy of the buoyancy tank 500 is adjusted Arm 700.

The buoyancy tank 500 is to match the buoyancy of the model ship support frame 200 and the rotating unit 800 to be described below, as shown in Figure 1 and 2, of the side frame 400 It is installed on each side. In the present embodiment, the buoyancy tank 500 is filled with nitrogen to prevent rust generation and at the same time to make resistance from external forces.

On the other hand, as shown in Figure 5, the buoyancy tank 500 is provided with a bracket 610. The bracket 610 serves to fix the buoyancy tank 500 to the side frame 400.

As shown in Figure 1 and 2, the push arm 700 is a support 710 is fastened to one side and the mobile tank 100, the other side of the support 710 and the model ship support frame 200 It is composed of a cylinder 720 for elastically connecting.

One side of the fixture 710 is fastened to the mobile tank 100, the other side is formed to extend vertically toward the model ship support frame 200. The holder 710 serves to support the model ship support frame 200 together with the cylinder 720 to the tram 100.

The cylinder 720 is for vertically moving by pressing the model support frame 200. To this end, as shown in FIGS. 6 and 7, the piston 730 is installed in the cylinder 720 so as to be movable in a direction parallel to the longitudinal direction of the cylinder 720. The piston 730 is operated by the control of a controller (not shown) to be described below serves to press the model ship support frame 200 while varying the length of the cylinder 720.

In the present embodiment, the cylinder 720 is a pneumatic cylinder, a device for converting the energy of the compressed air into a mechanical reciprocating linear motion, the piston 730 while the reciprocating linear motion in the cylinder 720 The model line support frame 200 will be pressed.

That is, as shown in Figure 6, in the state that the push arm 700 does not press the model ship support frame 200, the front end of the piston 730 is a fastening rod of the side frame 400 ( In the fastened state to 420, it is located inside the cylinder 720.

In this state, in order to adjust the draft of the model ship 1, as shown in Figure 7, the piston 730 moves away from the cylinder 720, that is, the arrow A direction The side frame 400 is pressed. In this case, while the buoyancy is adjusted, it is possible to adjust the draft of the model ship (1).

As such, since the main frame 300 and the side frame 400 and the draft variable unit 500 can be measured in one space without moving the model ship 1 according to the water depth, the space Not only does it improve utilization, it also saves time.

In the present embodiment, the cylinder 720 is formed in a streamline, as shown in Figs. This is to minimize the resistance of air and water.

On the other hand, as shown in Figure 8, the rotating unit 800 is installed in the installation space 301 of the main frame 300. The rotation unit 800 serves to adjust the direction of the model line 1 in accordance with the wind load measurement conditions while coupling the load cell 10 to the main frame 800.

The appearance and skeleton of the rotating unit 800 is formed by a load cell housing 810, as shown in FIG. The load cell housing 810 is detachably coupled to the mainframe 300. The load cell 10 is mounted on the load cell housing 810.

A plurality of coupling holes 812 penetrate the load cell housing 810. The coupling hole 812 is a portion into which the lift guide rod 850 to be described below is inserted.

As shown in FIG. 8 or 11, a seating table 820 is rotatably installed in the load cell housing 810. The seating table 820 is a portion in which the model ship 1 is seated on an upper surface, and serves to adjust the direction of the model ship 1.

A plurality of clamps 822 are provided at the upper edge of the seating table 820. As shown in FIG. 10, the clamp 822 serves to fasten the model ship 1 on the seating table 820.

The load cell flange 824 is provided at the center of the seating table 820. The load cell flange 824 is for coupling between the seating table 820 and the load cell 10.

The seating table 820 and the load cell flange 824 are connected by a plurality of connecting bars 826. The connection bar 826 is provided radially around the load cell flange 824.

As shown in FIG. 9, the load cell housing 810 is provided with a rotator 830. The rotator 830 serves to provide rotational force to the load cell 10 and the seating table 820. Inside the rotator 830, a rotation motor (not shown) and a speed reducer (not shown) for controlling the rotation speed of the rotation motor are installed and controlled by a controller.

As shown in FIG. 11, the load cell housing 810 is coupled to the lift 840. The lift 840 serves to selectively contact the rotator 830 toward the seat 820.

As shown in FIG. 10, the lift 840 is provided with a lift base 841. The lift base 841 has a substantially plate shape, and a coupling space 842 is formed at the center thereof. The coupling space 842 is a portion to which the load cell housing 810 is coupled.

A plurality of lift guide rods 850 pass through the lift base 841. The lift guide rod 850 has a substantially rod shape and is installed at a position corresponding to the coupling hole 812 of the load cell housing 810. As shown in FIG. 11, the lift guide rod 850 serves to closely contact the load cell housing 810 toward the seating plate 820.

As shown in FIG. 10, a plurality of stoppers 852 are provided on a top surface of the lift base 841 at a position corresponding to the lift guide rod 850. The stopper 852 serves to prevent the load cell housing 810 from escaping from the lift 840 and to regulate the movement distance of the load cell housing 810.

As shown in FIG. 10, the lift guide rod 850 is connected to the air piston 860. The air piston 860 presses one end of the lift guide rod 850 to move toward the seating table 820.

The rod push bar 862 is installed in the air piston 860 to be movable. The rod push bar 862 is formed to extend in a direction parallel to the lift guide rod 850. The rod push bar 862 is operated by the control of the controller serves to press the end of the lift guide rod 850.

On the other hand, the draft variable unit 500 and the rotation unit 800 is controlled by a controller (not shown). The controller executes instructions in accordance with a program stored in a storage device such as a computer.

On the other hand, in the present specification and drawings have been described with respect to preferred embodiments of the present invention, although specific terms are used, it is merely used in a general sense to easily explain the technical details of the present invention and to help the understanding of the invention, It is not intended to limit the scope of the invention. It is apparent to those skilled in the art that other modifications based on the technical idea of the present invention can be carried out in addition to the embodiments disclosed herein.

The present invention does not need to move the model ship to another space according to the depth, and can be used in the field of the experiment of the model ship because it is possible to achieve accurate test conditions.

Claims

As a wind load measuring device for model ships, which measures wind loads of model ships through a test cell in a test tank,

A tram rail installed at an upper portion of the test tank and providing a support force and providing a left and right movement path of the model ship;

A mobile tank connected to the model ship in a state of being coupled to the tram rail to move the model ship horizontally;

A model ship support frame supporting the model ship while being connected to the mobile tank;

A rotation unit installed on the model ship support frame and adjusting the direction of the model ship according to wind load measurement conditions while coupling the load cell to the model ship support frame;

A draft variable unit which connects the model ship supporting frame and the mobile tank and varies the height of the model ship supporting frame so that the draft of the model ship can be adjusted; And

Model ship wind load measurement apparatus comprising a controller for controlling the draft variable unit and the rotating unit.
The method of claim 1,

The draft variable unit,

Buoyancy tanks installed on both sides of the model ship support frame to provide buoyancy,

A push that is formed to extend vertically from the mobile tank toward the test tank and is connected to both sides of the model ship support frame, and is variable in length so as to adjust the buoyancy of the buoyancy tank by pressing the model ship support frame toward the water; Model ship wind load measurement apparatus characterized by comprising an arm.
The method of claim 2,

The push arm,

One side is fastened to the mobile tank and the other end is vertically extended toward the model ship support frame;

The other side of the fixture and the model ship support frame is elastically connected, the piston is operated by the control of the controller is provided, the length is variable and consists of a cylinder for pressing the model ship support frame to move vertically Model ship wind load measurement apparatus to use.
The method of claim 1,

The model ship support frame,

A main frame providing an installation space so that the rotating unit is installed at the center;

Model line wind load measuring apparatus, characterized in that the side frame is formed to extend in a direction away from each other is fastened to both sides of the main frame, the side variable variable unit is installed on both sides.
The method of claim 4, wherein

The main frame,

Model ship wind load measurement apparatus, characterized in that the support is provided to be supported on the bottom surface of the test tank in the state in which the side frame is separated.
The method of claim 1,

The rotating unit,

A load cell housing detachably coupled to the model ship support frame and having the load cell mounted thereon;

It is rotatably installed in the load cell housing, the model ship is seated on the upper surface to adjust the direction of the model ship,

A rotator provided in the load cell housing to provide rotational force to the load cell and the seating plate, and to be controlled by the controller, and

It provides a coupling space to which the load cell housing is coupled, and is provided with an air piston which is operated by the control of the controller to adjust the height of the rotator is composed of a lift to selectively adhere the rotator toward the seating plate Model ship wind load measurement apparatus characterized by the above-mentioned.
The method of claim 6,

Model ship wind load measuring device is characterized in that the upper edge of the seating is provided with a plurality of clamps for fastening the model ship on the seating.