KR101185216B1 - Captive model test method for the inclined hull with the keel - Google Patents

Abstract

PURPOSE: A method for a restrained model test of a monodrum type sailing yacht having keel is provided to simulate a testing condition capable of generating in an actual sailing state when performing a model testing of a sailing yacht and to accurately measure fluid dynamical moment and power added on the sailing yacht through a load cell. CONSTITUTION: A method for a restrained model test of a monodrum type sailing yacht having keel is as follows. A model ship joining unit(420) is joined to a model ship. A first bearing rotates at a predetermined angle toward a traversal direction. A bank rotation controlling unit(221) fixes an inclined state of a bank motional shaft. A load cell measures fluid dynamical moment and power added on the model ship when the water in a water tank flows. [Reference numerals] (AA) Front; (BB) Side

Description

Captive model test method for the inclined hull with the keel}

The present invention relates to a model test method of a sailing yacht.

1. Solutions to Ship Hydrodynamic Problems

The solution of the ship hydrodynamic problem is to use the mathematical model and the physical model. The method of using a mathematical model is a computer calculation of a simple shape, and the method of using a physical model is to make a model line and experiment.

Using a model ship is much more economical than experimenting with a full-scale ship and has the advantage of solving complex phenomena that cannot be solved by mathematical models. In particular, the problem of resistance propulsion of ships is very complicated, so the model test using physical model is mainly used. However, when the model line is manufactured and tested, a proper theory is necessary to interpret the results of the model test.

William Froude was the first to propose a model test of a ship, and the International Towing Tank Conference (ITTC) is an international conference on tanks. The tankers of the applicants, Korea Maritime Research Institute, Seoul National University, Pusan National University, Inha University, Ulsan University, etc. are joined as members.

2. Towing Tank

A towing tank is an experimental device equipped to measure a hydrodynamic force acting on a model ship while towing the model ship in a tank, or to observe or measure the flow phenomenon around the model ship. In towing tanks, experiments are conducted to achieve geometric and mechanical similarities between model and solid lines. Towing tanks are divided into small, medium, and large according to their size.

(1) small towing tank

It is a towing tank with a length of about 20m. It is cheap to build and is mainly used for education or research in schools.

In small towing tanks, the towing force is generally known by the weight of the gravitational weight and the speed is measured (Fig. 1). The resistance test in water purification or the resistance, motion, and speed loss test are performed in waves (regular waves). Ex) Catamaran test: Influence of hull spacing on resistance.

(2) Medium towing tank

Towing tanks having a length of about 200 m, more of which are classified as large towing tanks.

In the medium and large towing tanks, experiments are carried out according to the process of towing a model ship using a towing tank (FIG. 2). The length of the moving rail of the towing tank is long. One end of the tow is raised by about 1 mm, and in the case of large towing tanks, one end of the towing tank is raised by about 3.5 mm.

Model ships used in medium and large towing tanks are 5 to 10 meters in length and most control, measuring instruments and devices are made of electronic systems. The speed range of the towing tank is usually about 0 ~ 15m / s, and it is very precisely controlled and measured by the electronic system. The resistance or force applied to the model ship is measured by a dynamometer.

Types of experiments in medium and large towing tanks include resistance tests, self-test tests, propeller tests alone, reflux investigation tests, motor performance tests, and pilot performance tests.

3. Model ship

The model line refers to an experimental ship model manufactured according to a predetermined scale ratio such that a solid line, a geometric similarity, and a mechanical similarity are made, and is usually manufactured at a scale ratio of about 1/30 to the solid line.

Model ships are made of wood, paraffin wax, and fiberglass-reinforced plastic (FRP). Among them, paraffin wax model ships are easy to process and can be melted and reused. The paraffin wax model ship is optimal for resistance and self-testing, but is weaker than wood and therefore unsuitable for exercise testing.

(1) the production of wooden model ships

The wood board is processed into a waterline shape, laminated, and nc processed after being attached with a waterproof adhesive (FIG. 3).

(2) Preparation of paraffin wax model ship

The production sequence of paraffin wax model ship (example) is as follows.

① The template, bow, and stern profile templates at 20 stations are manufactured for mold (FIG. 4).

② Make a core template at the same station as above.

③ Complete the mold with wood or mud.

④ Surround the core with wooden board or waterproof cloth.

⑤ Assemble the mold and core.

⑥ Melt paraffin wax and pour it into mold and core gap. At this time, the core is filled with hot water at the same time.

⑦ Remove the core just before the casting is completely solidified.

⑧ Remove the model ship from the mold and install it on the cutting machine.

⑨ Align the top side of the model line and machine from the bottom side. At this time, it is processed at intervals of about 10mm per waterline, and the central symmetry plane is simultaneously cut from left and right using an NC milling machine.

⑩ Finally rub and wipe the surface of the model line smoothly.

4. Sailing yacht  Problem of Model Test

Since the sailing yacht is driven from the sails (sails) attached to the hull, it is common to attach a keel to the lower part of the hull to balance the force (Fig. 5). And in the case of sailing yachts, the sailing yacht is not only in line with the hydrodynamic centers of the sails and keels, but also does not coincide. It is common to proceed to a leeway at a predetermined angle with (Fig. 6).

However, most of the equipment for the model test performed in the towing tank are symmetrical for commercial ships, and the sailing yacht model cannot restrain the transverse and longitudinal inclinations and adjust the bow angle. However, sailing yachts are virtually never as steady as a merchant ship, so design and performance of inclined conditions and hydrodynamics must be considered in design, which is essential for determining keel specifications and performance. .

The present invention has been proposed to solve the above problems, it is possible to restrain the transverse and longitudinal inclination of the model ship and to adjust the bow angle during the model test of the sailing yacht, performance of the sailing yacht in the actual Hangzhou state And to provide a model test method for accurately identifying hydrodynamic properties.

Other objects and advantages of the present invention will be described below, which are not limited to the matters set forth in the claims and the disclosure of the embodiments thereof, but also to the broader ranges by means and combinations within the range readily recited therefrom. Add that it will be included.

According to an aspect of the present invention,

A fixed support shaft which is constrained and extended downward by an upper end;

It is coupled to the lower end of the fixed support shaft, the first bearing capable of rotation in the longitudinal and transverse inclination direction, and coupled to both sides in the transverse inclination direction of the first bearing in the transverse inclination direction with the rotation in the transverse inclination direction of the first bearing An upper rotating module including a transverse tilt axis inclined toward the cross section and a longitudinal tilt axis coupled to both sides of the first bearing in the longitudinal direction of the first bearing and inclined along the longitudinal direction of the first bearing;

Rotation transmission shaft and the upper end is constrained to the upper rotary module and extends down;

Lower rotation including a second bearing coupled to the lower end of the rotation transmission shaft, the horizontal bearing can be rotated in a horizontal direction, and a horizontal motion plate coupled to the second bearing as a plate-like structure to rotate in a horizontal direction with the second bearing. module;

As a restraint model test method of a single-acting sailing yacht having a keel using a restraint model test device of a single-acting sailing yacht having a keel,

Combining the model line coupling unit with the model line;

Rotating the first bearing laterally by a predetermined angle;

Fixing the tilted state of the transverse tilt movement axis by the transverse social restraint unit;

Measuring the hydrodynamic force and moment applied to the model ship by the load cell when water in the tank flows;

It proposes a restraint model test method of a single-acting sailing yacht having a keel.

Further, according to the present invention,

As a restraint model test method of a single-acting sailing yacht having a keel using the restraint model test apparatus of the single-acting sailing yacht having the keel,

Combining the model line coupling unit with the model line;

Rotating the first bearing longitudinally by a predetermined angle;

A longitudinal race social restraining unit fixing the inclined state of the longitudinal slope movement axis;

Measuring the hydrodynamic force and moment applied to the model ship by the load cell when water in the tank flows;

It proposes a restraint model test method of a single-acting sailing yacht having a keel.

Further, according to the present invention,

As a restraint model test method of a single-acting sailing yacht having a keel using the restraint model test apparatus of the single-acting sailing yacht having the keel,

Combining the model line coupling unit with the model line;

Rotating the second bearing in a horizontal direction by a predetermined angle;

Fixing the rotated state of the horizontal movement plate by the horizontal rotational restraint unit;

Measuring the hydrodynamic force and moment applied to the model ship by the load cell when water in the tank flows;

It proposes a restraint model test method of a single-acting sailing yacht having a keel.

Further, according to the present invention,

As a restraint model test method of a single-acting sailing yacht having a keel using the restraint model test apparatus of the single-acting sailing yacht having the keel,

Combining the model line coupling unit with the model line;

Rotating the first bearing in the lateral and longitudinal directions by a predetermined angle;

The transverse social restraint unit fixing the inclined state of the transverse tilt movement axis, and the longitudinal succession social restraint unit fixing the inclined state of the longitudinal tilt movement axis;

Measuring the hydrodynamic force and moment applied to the model ship by the load cell when water in the tank flows;

It proposes a restraint model test method of a single-acting sailing yacht having a keel.

Further, according to the present invention,

As a restraint model test method of a single-acting sailing yacht having a keel using the restraint model test apparatus of the single-acting sailing yacht having the keel,

Combining the model line coupling unit with the model line;

Rotating the first bearing in the lateral and longitudinal directions by a predetermined angle, and also rotating the second bearing in the horizontal direction by a predetermined angle;

The transverse social restraint unit fixing the tilted state of the transverse tilt movement axis, the longitudinal social restraint unit fixing the tilted state of the longitudinal tilt movement axis, and the horizontal rotation restraint unit fixing the rotated state of the horizontal exercise plate;

Measuring the hydrodynamic force and moment applied to the model ship by the load cell when water in the tank flows;

It proposes a restraint model test method of a single-acting sailing yacht having a keel.

Further, according to the present invention,

As a restraint model test method of a single-acting sailing yacht having a keel using the restraint model test apparatus of the single-acting sailing yacht having the keel,

Combining the model line coupling unit with the model line;

Rotating the first bearing in a horizontal direction by a predetermined angle and also rotating the second bearing in a horizontal direction by a predetermined angle;

Fixing the inclined state of the transverse inclination movement shaft to the transverse tilt movement axis, and the horizontal rotation restraint portion to fix the rotated state of the horizontal movement plate;

Measuring the hydrodynamic force and moment applied to the model ship by the load cell when water in the tank flows;

It proposes a restraint model test method of a single-acting sailing yacht having a keel.

Further, according to the present invention,

As a restraint model test method of a single-acting sailing yacht having a keel using the restraint model test apparatus of the single-acting sailing yacht having the keel,

Combining the model line coupling unit with the model line;

Rotating the first bearing in a longitudinal direction by a predetermined angle and also rotating the second bearing in a horizontal direction by a predetermined angle;

A longitudinal race social restraint unit fixing an inclined state of the longitudinal tilt movement axis, and the horizontal rotation restraint unit also fixes a rotated state of the horizontal exercise plate;

Measuring the hydrodynamic force and moment applied to the model ship by the load cell when water in the tank flows;

It proposes a restraint model test method of a single-acting sailing yacht having a keel.

According to the present invention, it is possible to reproduce the test conditions that can occur in the actual hang state when the model test of the sailing yacht as desired, thereby accurately measuring the hydrodynamic force and moment applied to the sailing yacht through the attached load cell It becomes possible.

Other effects of the present invention, as well as those described in the above-described embodiments and claims of the present invention, as well as potential effects that may occur within the range that can be easily estimated therefrom and potential advantages that contribute to industrial development It will be added that it will be covered by a wider scope.

1 is a gravity-type small towing tank.
2 is a towing tank of a medium towing tank.
3 is a production state of the wooden model ship.
Figure 4 is a production state of the wax model ship.
5 is a sailing yacht and keel.
6 is the direction of the force and moment applied to the sailing yacht.
7 is an overall configuration of a model test apparatus according to the present invention.
Figure 8 is a model test apparatus according to the present invention mounted on a model ship of the sailing yacht to test.
Figure 9 is a detail view of the longitudinal social constrained part in the model test apparatus according to the present invention.
10 is a detailed view of the transverse social restraint in the model test apparatus according to the present invention.
11 is a detailed view of the horizontal rotational restraint in the model test apparatus according to the present invention.
12 is a detailed view of the model line coupling unit in the model test apparatus according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to designate the same or similar components throughout the drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. In addition, the preferred embodiments of the present invention will be described below, but it is needless to say that the technical idea of the present invention is not limited thereto and can be variously modified by those skilled in the art.

The present invention can restrain the transverse and longitudinal inclination of the model ship and adjust the bow angle during the model test of the sailing yacht, so that it is possible to accurately grasp the performance and hydrodynamic characteristics of the sailing yacht in the actual hang state. It is about a model test method.

The present invention can be implemented using the present applicant "constrained model test device of the single-acting sailing yacht with keel" (hereinafter referred to as "model test apparatus according to the present invention"), the present invention The model test apparatus according to the description will first be described.

Figure 7 shows the overall configuration of the model test apparatus according to the present invention, Figure 8 shows the state of the test by mounting the model test apparatus according to the present invention to the model ship of the sailing yacht. 9 is a detailed view of the longitudinal social restraint in the model test apparatus according to the present invention, Figure 10 is a detailed view of the transverse social restraint, Figure 11 is a detailed view of the horizontal rotational restraint, Figure 12 is a model line coupling unit Shows a detailed look.

Model test apparatus according to the present invention is made to include a fixed support shaft 100, the upper rotary module 200, the rotary transmission shaft 300 and the lower rotary module 400 as shown in Figure 7 and 8 , In the order from the top to the bottom of the fixed support shaft 100, the upper rotary module 200, the rotary transmission shaft 300 and the lower rotary module 400, will be described in detail for each component below. .

1. Fixed support shaft

Fixed support shaft 100 is a rod-shaped structure, the upper end is constrained so as not to move down and down and coupled with the upper rotary module 200 at the lower end (Fig. 8).

The fixed support shaft 100 supports the present invention to maintain a stable state without shaking throughout the entire process of operation in conjunction with the model ship, and to support the lateral inclination and longitudinal slope of the model ship can be maintained in a constrained state Role (Fig. 8).

It is preferable that the fixed support shaft 100 extends downward in the vertical direction with respect to the water surface of the towing tank (FIG. 8), which identifies the degree of rotation of the upper rotary module 200 when the fixed support shaft 100 is modeled. This is because it serves as a criterion to control and control.

That is, in FIG. 8, the fixed support shaft 100 extends downward in the vertical direction with respect to the water surface of the towing tank, and the rotation transmission shaft 300 rotates by θ in association with the rotation of the upper rotary module 200. If the fixed support shaft 100 is inclined by a predetermined angle with respect to the water surface of the towing tank, the operator rotates the upper rotary module 200 (rotating transmission shaft 300 associated with it). The degree of rotation may be misidentified as θ ± α, and thus, accurate model tests may not be performed.

2. Upper rotary module

The upper rotary module 200 is a module that rotates (tilts) in the longitudinal and transverse inclination directions of the model ship in accordance with the movement of the first bearing in a state coupled to the lower end of the fixed support shaft 100, the first bearing (Not shown), including the transverse tilt axis 210 and the longitudinal tilt axis 220 (Fig. 7).

The first bearing is located at the center of the upper rotary module 200, and the model line can rotate in the longitudinal and transverse slope directions.

Here, the rotation of the first bearing in the longitudinal inclination direction of the model ship means that the first bearing performs the rotational movement of the Y axis itself in FIG. 5, and thus, the model ship is inclined in the X-axis direction. do. The state in which the model ship (or the actual ship) is inclined in the X-axis direction is called pitching.

The rotation of the first bearing in the lateral inclination direction of the model line means that the first bearing performs the rotational movement of the X axis itself in FIG. 5, and thus the model line is inclined in the Y-axis direction. . The state in which the model ship (or the actual ship) is inclined in the Y-axis direction is called rolling.

The transverse tilt axis 210 is coupled to both sides in the transverse slope direction of the first bearing and is inclined in the transverse slope direction with the transverse slope rotation of the first bearing (FIGS. 7 and 8).

That is, the transverse tilt axis 210 is an axial structure protruding in both directions in the Y-axis direction in FIGS. 7 and 8, and when the first bearing rotates in the transverse direction of the model line, the transverse direction (Y-axis direction) Rolling by.

And the longitudinal inclination motion axis 220 is coupled to both sides in the longitudinal inclination direction of the first bearing is inclined in the longitudinal inclination direction with the longitudinal inclination of the first bearing (Fig. 7).

That is, the longitudinal tilting axis 220 is an axial structure protruding in both directions in the X-axis direction in FIG. 7, and when the first bearing rotates in the longitudinal tilting direction of the model line, the longitudinal tilting axis 220 is inclined in the longitudinal tilting direction (X-axis direction). Pitching.

At this time, the transverse tilt axis 210 and the longitudinal tilt axis 220 should be coupled to be orthogonal to each other around the first bearing. This is to ensure that the rotation of the first bearing in the transverse and longitudinal slope directions can be accurately implemented and controlled.

On the other hand, the transverse tilt movement axis 210 is provided with a longitudinal social movement restraint portion 211 for restraining and fixing the state in which the longitudinal tilt movement axis 220 is inclined by a predetermined angle in the longitudinal slope direction, such longitudinal longitudinal social restraint The function of the unit 211 may be implemented by blocking the longitudinal rotation of the first bearing in the bolt.

When the first bearing rotates in the longitudinal tilt direction, the longitudinal tilting axis 220 is inclined in the longitudinal tilting direction (X direction) with the longitudinal tilting direction of the first bearing, and the transverse tilting axis 210 is the first bearing. The axis itself rotates along with the longitudinal tilt of the rotation (which corresponds to the rotation of the Y axis itself in FIG. 5. In the present invention, the transverse tilt axis 210 corresponds to the Y axis in FIG. 5).

At this time, when the longitudinal tilting axis 220 is inclined by a predetermined angle in the longitudinal tilting direction (that is, when the transverse tilting axis 210 itself is rotated by a predetermined angle), shown in Figure 9 When the bolt is locked into the hole of the longitudinal social constraining portion 211 as described above, the bolt blocks the rotation of the transverse tilt movement shaft 210 itself (therefore the rotation in the longitudinal direction of the first bearing is also blocked). The axis of motion 220 is no longer tilted and is fixed.

In addition, the longitudinal tilt movement axis 220 includes a transverse social restraint portion 221 for restraining and fixing the state in which the transverse tilt axis 210 is inclined by a predetermined angle in the transverse tilt direction. The function of the part 221 may be implemented by blocking the lateral rotation of the first bearing with a bolt.

When the first bearing rotates in the transverse slope direction, the transverse tilt axis 210 is inclined in the transverse slope direction (Y direction) along with the transverse tilt direction of the first bearing, and the longitudinal tilt axis 220 is the first bearing. The axis itself rotates along with the transverse direction of the rotation (which corresponds to the rotation of the X axis itself of FIG. 5. In the present invention, the longitudinal tilt axis 220 corresponds to the X axis of FIG. 5).

At this time, when the transverse tilt axis 210 is inclined by a predetermined angle in the transverse tilt direction (that is, when the longitudinal tilt axis 220 itself is rotated by a predetermined angle), shown in FIG. When the bolt is locked into the hole of the transverse social forward restraint unit 221 as described above, the bolt blocks the rotation of the longitudinal tilting shaft 220 itself (therefore the rotation of the first bearing is also blocked in the transverse direction). Four axis of motion (210) is no longer tilted and is fixed.

3. Rotating transmission shaft  And connection module

Rotational transmission shaft 300 is a rod-shaped structure, the upper end is constrained to the upper rotary module 200 is extended down and coupled to the lower rotary module 400 at the lower end (Fig. 7).

The rotation transmission shaft 300 serves to transmit the rotation state of the upper rotation module 200 to the model ship (FIG. 8). That is, the rotation transmission shaft 300 is to connect the upper rotation module 200 and the model line to each other, so that the model line is inclined by the inclined angle of the upper rotation module 200.

The function of the rotation transmission shaft 300 can be more easily implemented by the connection module 500, the connection module 500 and the upper end of the rotation transmission shaft 300 as shown in FIG. Combining serves to restrain the rotary transmission shaft 300 to the upper rotary module 200.

More specifically, the connection module 500 includes a connection leg 510 fixedly installed at both ends of the transverse tilt axis 210; It is coupled to the lower end of the connecting leg 510 as a plate-like structure, the connection plate 520 for maintaining a state spaced down by a predetermined distance with respect to the upper rotary module 200; consisting of (Fig. 7).

Therefore, as described above, the longitudinal tilt movement axis 220 is fixed to the state inclined by the predetermined angle in the longitudinal tilt direction by the longitudinal social restraint portion 211, or the horizontal tilt sound by the transverse social restraint portion 221. When the coaxial 210 is fixed in a state inclined by a predetermined angle in the transverse inclination direction, the restrained state is transmitted to the connecting plate 520 through the connecting leg 510, and finally, the connecting plate 520. The longitudinal inclination axis 220 and the transverse inclination axis 210 is inclined in the longitudinal or transverse direction by the same angle, the model line diagram connected to the lower portion of the rotation transmission axis 300 connecting plate 520 It is inclined in the longitudinal or transverse inclination direction by the same angle as the inclination angle (Fig. 8).

As a result, according to the present invention, it is possible to accurately grasp the performance and hydrodynamic characteristics of the sailing yacht in actual sailing state through the process of restraining the lateral inclination and longitudinal inclination of the model ship during the model test of the sailing yacht.

On the other hand, in order for the function of the rotation transmission shaft 300 as described above to be properly implemented, the rotation transmission shaft 300 should be vertically coupled to the connecting plate 520. If the rotation transmission shaft 300 is coupled to the connecting plate 520 at a non-perpendicular angle, the angle of the connecting plate 520 in the longitudinal or transverse direction may be different from that of the model line. This is because accurate model tests cannot be performed.

4. Lower rotating module

The lower rotary module 400 is a module that rotates in the horizontal direction in accordance with the movement of the second bearing in a state coupled to the lower end of the rotary transmission shaft 300, the second bearing (not shown) and the horizontal plate 410 ) (FIG. 7).

The second bearing is located at the center of the lower rotation module 400, and the model bearing can rotate in the horizontal direction.

Here, the rotation of the second bearing in the horizontal direction of the model line refers to the rotation of the second bearing in the Z axis itself, as shown in FIG. 5, whereby the model line is clockwise or counterclockwise with respect to the Z axis. Will be in a deflected state. The state in which the model ship (or the actual ship) is deflected clockwise or counterclockwise with respect to the Z axis is called leeway.

The horizontal plate 410 is a plate-like structure coupled to the second bearing to rotate in the horizontal direction with the second bearing (Figs. 7 and 8).

That is, the horizontal motion plate 410 is a plate-like structure coupled to be orthogonal to the axis of the rotation transmission axis 300 in Figure 7, when the second bearing is rotated in the horizontal direction of the model line, together with the clock or the Z axis It is a deflection in the counterclockwise direction.

On the other hand, the horizontal motion plate 410 is provided with a horizontal rotation restraining portion 411 for restraining the lower rotation module 400 is rotated by a predetermined angle in the horizontal direction to prevent further rotational movement (Fig. 7), the function of the horizontal rotational restraint 411 may be implemented by blocking the horizontal rotation of the second bearing with a bolt.

When the second bearing rotates in the horizontal direction, the horizontal motion plate 410 is deflected clockwise or counterclockwise with respect to the Z axis along with the horizontal rotation of the second bearing (this is due to the rotation of the Z axis itself in FIG. 5). In the present invention, the horizontal plate 410 corresponds to the Z axis of FIG.

At this time, when the bolt is locked into the hole of the horizontal rotational restraint 411 as shown in Figure 11 to block the rotation of the horizontal motion plate 410 itself (thus blocking the horizontal rotation of the second bearing) ), The lower rotation module 400 is no longer rotated and fixed.

On the other hand, the bottom end of the lower rotary module 400 is attached to the model ship coupling portion 420, the model ship coupling portion 420 is coupled to the model ship by a bolt as a plate-like structure (Figs. 8 and 12).

The rotation state of the lower rotary module 400 is transmitted as it is to the model ship by the model ship coupling unit 420. 8 shows the state in which the lower rotary module 400 is constrained by the horizontal rotation restraining unit 411 after rotating by a predetermined angle in the horizontal direction, whereby the bow of the model ship at the time of the model test of the sailing yacht By adjusting the angle, the performance and hydrodynamic characteristics of the sailing yacht can be accurately identified.

5. Using the model test apparatus according to the present invention Sailing yacht  Model test (model test method according to the present invention)

As a model test method according to the present invention, a model test performed in a state in which the lateral inclination of the model line is restrained may be performed according to the following example.

(1a) The model line coupler 420 couples with the model line. At this time, the model line coupler 420 is fastened to the model line with a bolt. On the other hand, in this step, the model ship is in the normal Hangzhou state, the upper rotary module 200 and the rotary transmission shaft 300 is also in a state inclined or not rotated.

(2a) The first bearing rotates in the lateral direction by a predetermined angle. Accordingly, the transverse inclination axis 210 is also inclined in the transverse direction, and this change is transmitted to the rotation transmission axis 300 along the connection module 500, so that the rotation transmission axis 300 of the transverse tilt axis 210 It is inclined laterally by the inclined angle. The model line is thus also rolled by the same angle in the transverse direction.

(3a) The transverse social front restraint unit 221 fixes the tilted state of the transverse tilt motion axis 210. According to this step, the model line is fixed in a rolling state, and the upper rotary module 200 and the rotation transmission shaft 300 are also inclined in the horizontal direction by the angle of inclination of the model line.

(4a) As the water in the tank flows, the load cell measures the hydrodynamic forces and moments applied to the model ship.

On the other hand, as a model test method according to the present invention, the model test made in the state in which the longitudinal slope of the model ship can be made according to the following example.

(1b) The model line coupler 420 couples with the model line. At this time, the model line coupler 420 is fastened to the model line with a bolt. On the other hand, in this step, the model ship is in the normal Hangzhou state, the upper rotary module 200 and the rotary transmission shaft 300 is also in a state inclined or not rotated.

(2b) The first bearing rotates in the longitudinal direction by a predetermined angle. Accordingly, the longitudinal tilting axis 220 is also inclined in the longitudinal direction and the transverse tilting axis 210 itself rotates, and this change is transmitted to the rotational transmission axis 300 along the connection module 500, thereby transmitting the rotational transmission axis. 300 is inclined in the longitudinal direction by the inclined angle of the longitudinal tilting axis (220). The model line is thus also pitched by the same angle in the longitudinal direction.

(3b) longitudinal longitudinal social restraint unit 211 fixes the inclined state of the longitudinal tilting movement axis 220. According to this step, the model line is fixed in a pitching state, and the upper rotary module 200 and the rotation transmission shaft 300 are also inclined in the longitudinal direction by the angle of inclination of the model line.

(4b) As the water in the tank flows, the load cell measures the hydrodynamic forces and moments applied to the model ship.

On the other hand, as a model test method according to the invention, the model test made in the state of restraint of the bow angle of the model ship may be made according to the following example.

(1c) The model line coupler 420 couples with the model line. At this time, the model line coupler 420 is fastened to the model line with a bolt. On the other hand, in this step, the model ship is in the normal Hangzhou state, the upper rotary module 200 and the rotary transmission shaft 300 is also in a state inclined or not rotated.

(2c) The second bearing rotates in the horizontal direction by a predetermined angle. Accordingly, the horizontal plate 410 also rotates in the horizontal direction by the same angle. Accordingly, the model line is also deflected clockwise or counterclockwise with respect to the Z axis.

(3c) The horizontal rotation restrainer 411 fixes the rotated state of the horizontal motion plate 410. According to this step, the model ship is fixed in the leeway state.

(4c) As the water in the tank flows, the load cell measures the hydrodynamic forces and moments applied to the model ship.

On the other hand, according to the present invention it is possible to implement a variety of Hangzhou state of the sailing yacht by applying the above process mixed. That is, it is possible to implement a state in which the transverse slope and the longitudinal slope of the model line are simultaneously constrained, or the transverse slope and the longitudinal slope of the model line are constrained, and the bow angle is also constrained. In addition, it is possible to implement a state in which the lateral inclination and the bow angle of the model line are simultaneously constrained, or the longitudinal inclination and the bow angle of the model line are simultaneously constrained. Hereinafter, the process (example) in which the model test is implemented by implementing each of these states will be described in detail.

As a model test method according to the present invention, the model test made in the state of constraining the transverse slope and the longitudinal slope of the model line at the same time can be made according to the following example.

(1d) The model line coupler 420 couples with the model line. At this time, the model line coupler 420 is fastened to the model line with a bolt. On the other hand, in this step, the model ship is in the normal Hangzhou state, the upper rotary module 200 and the rotary transmission shaft 300 is also in a state inclined or not rotated.

(2d) The first bearing rotates in the transverse direction and the longitudinal direction by a predetermined angle. Accordingly, the transverse tilt axis 210 is inclined in the transverse direction, such a change is transmitted to the rotary transmission axis 300 along the connection module 500, the rotary transmission axis 300 of the transverse tilt axis 210 It is inclined laterally by the inclined angle. The model line is thus also rolled by the same angle in the transverse direction.

At the same time, the longitudinal tilting axis 220 is also inclined in the longitudinal direction and the transverse tilting axis 210 itself is also rotated, this change is transmitted to the rotary transmission axis 300 along the connection module 500, the rotational transmission The shaft 300 is inclined in the longitudinal direction by the inclination angle of the longitudinal tilting axis 220. The model line is thus pitched in the longitudinal direction by the same angle.

(3d) The transverse social restraint unit 221 fixes the tilted state of the transverse tilt movement axis 210, and the longitudinal social restraint unit 211 also fixes the tilted state of the longitudinal tilt exercise axis 220. According to this step, the model line is fixed in a rolling and pitching state, and the upper rotary module 200 and the rotation transmission shaft 300 are also inclined in the transverse direction and the longitudinal direction by the inclination angle of the model line.

(4d) As the water in the tank flows, the load cell measures the hydrodynamic forces and moments applied to the model ship.

On the other hand, as a model test method according to the present invention, the model test made in the state of restraining the lateral inclination and longitudinal inclination of the model line and in addition to the bow angle may be made according to the following example.

(1e) The model line coupler 420 couples with the model line. At this time, the model line coupler 420 is fastened to the model line with a bolt. On the other hand, in this step, the model ship is in the normal Hangzhou state, the upper rotary module 200 and the rotary transmission shaft 300 is also in a state inclined or not rotated.

(2e) The first bearing rotates in the lateral direction and the longitudinal direction by a predetermined angle, and the second bearing also rotates in the horizontal direction by the predetermined angle. Accordingly, the transverse tilt axis 210 is inclined in the transverse direction, such a change is transmitted to the rotary transmission axis 300 along the connection module 500, the rotary transmission axis 300 of the transverse tilt axis 210 It is inclined laterally by the inclined angle. The model line is thus also rolled by the same angle in the transverse direction.

At the same time, the longitudinal tilting axis 220 is also inclined in the longitudinal direction and the transverse tilting axis 210 itself is also rotated, this change is transmitted to the rotary transmission axis 300 along the connection module 500, the rotational transmission The shaft 300 is inclined in the longitudinal direction by the inclination angle of the longitudinal tilting axis 220. The model line is thus pitched in the longitudinal direction by the same angle.

In addition, the horizontal motion plate 410 is also rotated in the horizontal direction by the rotation angle of the second bearing. Accordingly, the model line is also deflected clockwise or counterclockwise with respect to the Z axis.

(3e) the transverse social restraint portion 221 fixes the inclined state of the transverse tilt movement axis 210, and the longitudinal social restraint portion 211 fixes the inclined state of the longitudinal tilt movement axis 220, The horizontal rotation restraint unit 411 fixes the rotated state of the horizontal motion plate 410. According to this step, the model line is fixed in a rolling, pitching and leeway state, and the upper rotary module 200 and the rotation transmission shaft 300 are also inclined in the horizontal direction and the longitudinal direction by the inclination angle of the model line.

(4e) As the water in the tank flows, the load cell measures the hydrodynamic forces and moments applied to the model ship.

On the other hand, as a model test method according to the present invention, the model test made in the state in which the lateral inclination and bow angle of the model line at the same time can be made according to the following example.

(1f) The model ship coupling unit 420 couples with the model ship. At this time, the model line coupler 420 is fastened to the model line with a bolt. On the other hand, in this step, the model ship is in the normal Hangzhou state, the upper rotary module 200 and the rotary transmission shaft 300 is also in a state inclined or not rotated.

(2f) The first bearing rotates in the lateral direction by a predetermined angle, and the second bearing also rotates in the horizontal direction by a predetermined angle. Accordingly, the transverse tilt axis 210 is inclined in the transverse direction, such a change is transmitted to the rotary transmission axis 300 along the connection module 500, the rotary transmission axis 300 of the transverse tilt axis 210 It is inclined laterally by the inclined angle. The model line is thus also rolled by the same angle in the transverse direction.

In addition, the horizontal motion plate 410 is also rotated in the horizontal direction by the rotation angle of the second bearing. Accordingly, the model line is also deflected clockwise or counterclockwise with respect to the Z axis.

(3f) The transverse social restraint unit 221 fixes the inclined state of the transverse tilt movement shaft 210, and the horizontal rotation restraint unit 411 also fixes the rotated state of the horizontal exercise plate 410. According to this step, the model line is fixed in a rolling and leeway state, and the upper rotary module 200 and the rotation transmission shaft 300 are also inclined in the horizontal direction by the angle of inclination of the model line.

(4f) As the water in the tank flows, the load cell measures the hydrodynamic forces and moments applied to the model ship.

Lastly, as a model test method according to the present invention, a model test performed in the state in which the longitudinal slope and bow angle of the model ship are simultaneously restrained may be performed according to the following example.

(1g) Model ship coupling unit 420 is coupled to the model ship. At this time, the model line coupler 420 is fastened to the model line with a bolt. On the other hand, in this step, the model ship is in the normal Hangzhou state, the upper rotary module 200 and the rotary transmission shaft 300 is also in a state inclined or not rotated.

(2g) The first bearing rotates in the longitudinal direction by a predetermined angle, and the second bearing also rotates in the horizontal direction by a predetermined angle. Accordingly, the longitudinal tilting axis 220 is inclined in the longitudinal direction and also rotates the transverse tilting axis 210 itself, this change is transmitted to the rotational transmission axis 300 along the connection module 500, the rotational transmission axis 300 is inclined in the longitudinal direction by the inclined angle of the longitudinal tilting axis (220). The model line is thus pitched in the longitudinal direction by the same angle.

In addition, the horizontal motion plate 410 is also rotated in the horizontal direction by the rotation angle of the second bearing. Accordingly, the model line is also deflected clockwise or counterclockwise with respect to the Z axis.

(3g) the longitudinal social restraint unit 211 fixes the inclined state of the longitudinal tilt movement shaft 220, and the horizontal rotation restraint unit 411 also fixes the rotated state of the horizontal exercise plate 410. According to this step, the model line is fixed in a pitching and leeway state, and the upper rotary module 200 and the rotation transmission shaft 300 are also inclined in the longitudinal direction by the angle of inclination of the model line.

(4g) When water in a tank flows, the load cell measures the hydrodynamic forces and moments applied to the model ship.

As described above, according to the present invention, when the model test of the sailing yacht can be reproduced as desired test conditions that can occur in the actual Hangzhou state, according to the hydrodynamic force and moment applied to the sailing yacht through the attached load cell It is possible to measure accurately.

It will be apparent to those skilled in the art that various modifications, substitutions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. will be. Accordingly, the embodiments disclosed in the present invention and the accompanying drawings are not intended to limit the technical spirit of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by the embodiments and the accompanying drawings. . The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

100: fixed support shaft 400: lower rotation module
200: upper rotation module 410: horizontal motion plate
210: horizontal tilt motion axis 411: horizontal rotation restraint
211: Chongqing Social Constraints 420: Model Ship Joint
220: longitudinal tilt axis 500: connection module
221: traverse social restraint 510: connecting bridge
300: rotation transmission shaft 520: connecting plate

Claims (7)

A fixed support shaft which is constrained and extended downward by an upper end;
It is coupled to the lower end of the fixed support shaft, the first bearing capable of rotation in the longitudinal and transverse inclination direction, and coupled to both sides in the transverse inclination direction of the first bearing in the transverse inclination direction with the rotation in the transverse inclination direction of the first bearing An upper rotating module including a transverse tilt axis inclined toward the cross section and a longitudinal tilt axis coupled to both sides of the first bearing in the longitudinal direction of the first bearing and inclined along the longitudinal direction of the first bearing;
Rotation transmission shaft and the upper end is constrained to the upper rotary module and extends down;
Lower rotation including a second bearing coupled to the lower end of the rotation transmission shaft, the horizontal bearing can be rotated in the horizontal direction, and a horizontal motion plate coupled to the second bearing as a plate-like structure to rotate in the horizontal direction together with the second bearing. module;
As a restraint model test method of a single-acting sailing yacht having a keel using a restraint model test device of a single-acting sailing yacht having a keel,
Combining the model line coupling unit with the model line;
Rotating the first bearing laterally by a predetermined angle;
Fixing the tilted state of the transverse tilt movement axis by the transverse social restraint unit;
Measuring the hydrodynamic force and moment applied to the model ship by the load cell when water in the tank flows;
Restraint model test method of the single-acting sailing yacht having a keel comprising a. A fixed support shaft which is constrained and extended downward by an upper end;
It is coupled to the lower end of the fixed support shaft, the first bearing capable of rotation in the longitudinal and transverse inclination direction, and coupled to both sides in the transverse inclination direction of the first bearing in the transverse inclination direction with the rotation in the transverse inclination direction of the first bearing An upper rotating module including a transverse tilt axis inclined toward the cross section and a longitudinal tilt axis coupled to both sides of the first bearing in the longitudinal direction of the first bearing and inclined along the longitudinal direction of the first bearing;
Rotation transmission shaft and the upper end is constrained to the upper rotary module and extends down;
Lower rotation including a second bearing coupled to the lower end of the rotation transmission shaft, the horizontal bearing can be rotated in the horizontal direction, and a horizontal motion plate coupled to the second bearing as a plate-like structure to rotate in the horizontal direction together with the second bearing. module;
As a restraint model test method of a single-acting sailing yacht having a keel using a restraint model test device of a single-acting sailing yacht having a keel,
Combining the model line coupling unit with the model line;
Rotating the first bearing longitudinally by a predetermined angle;
A longitudinal race social restraining unit fixing the inclined state of the longitudinal slope movement axis;
Measuring the hydrodynamic force and moment applied to the model ship by the load cell when water in the tank flows;
Restraint model test method of the single-acting sailing yacht having a keel comprising a. A fixed support shaft which is constrained and extended downward by an upper end;
It is coupled to the lower end of the fixed support shaft, the first bearing capable of rotation in the longitudinal and transverse inclination direction, and coupled to both sides in the transverse inclination direction of the first bearing in the transverse inclination direction with the rotation in the transverse inclination direction of the first bearing An upper rotating module including a transverse tilt axis inclined toward the cross section and a longitudinal tilt axis coupled to both sides of the first bearing in the longitudinal direction of the first bearing and inclined along the longitudinal direction of the first bearing;
Rotation transmission shaft and the upper end is constrained to the upper rotary module and extends down;
Lower rotation including a second bearing coupled to the lower end of the rotation transmission shaft, the horizontal bearing can be rotated in the horizontal direction, and a horizontal motion plate coupled to the second bearing as a plate-like structure to rotate in the horizontal direction together with the second bearing. module;
As a restraint model test method of a single-acting sailing yacht having a keel using a restraint model test device of a single-acting sailing yacht having a keel,
Combining the model line coupling unit with the model line;
Rotating the second bearing in a horizontal direction by a predetermined angle;
Fixing the rotated state of the horizontal movement plate by the horizontal rotational restraint unit;
Measuring the hydrodynamic force and moment applied to the model ship by the load cell when water in the tank flows;
Restraint model test method of the single-acting sailing yacht having a keel comprising a. A fixed support shaft which is constrained and extended downward by an upper end;
It is coupled to the lower end of the fixed support shaft, the first bearing capable of rotation in the longitudinal and transverse inclination direction, and coupled to both sides in the transverse inclination direction of the first bearing in the transverse inclination direction with the rotation in the transverse inclination direction of the first bearing An upper rotating module including a transverse tilt axis inclined toward the cross section and a longitudinal tilt axis coupled to both sides of the first bearing in the longitudinal direction of the first bearing and inclined along the longitudinal direction of the first bearing;
Rotation transmission shaft and the upper end is constrained to the upper rotary module and extends down;
Lower rotation including a second bearing coupled to the lower end of the rotation transmission shaft, the horizontal bearing can be rotated in the horizontal direction, and a horizontal motion plate coupled to the second bearing as a plate-like structure to rotate in the horizontal direction together with the second bearing. module;
As a restraint model test method of a single-acting sailing yacht having a keel using a restraint model test device of a single-acting sailing yacht having a keel,
Combining the model line coupling unit with the model line;
Rotating the first bearing in the lateral and longitudinal directions by a predetermined angle;
The transverse social restraint unit fixing the inclined state of the transverse tilt movement axis, and the longitudinal succession social restraint unit fixing the inclined state of the longitudinal tilt movement axis;
Measuring the hydrodynamic force and moment applied to the model ship by the load cell when water in the tank flows;
Restraint model test method of the single-acting sailing yacht having a keel comprising a. A fixed support shaft which is constrained and extended downward by an upper end;
It is coupled to the lower end of the fixed support shaft, the first bearing capable of rotation in the longitudinal and transverse inclination direction, and coupled to both sides in the transverse inclination direction of the first bearing in the transverse inclination direction with the rotation in the transverse inclination direction of the first bearing An upper rotating module including a transverse tilt axis inclined toward the cross section and a longitudinal tilt axis coupled to both sides of the first bearing in the longitudinal direction of the first bearing and inclined along the longitudinal direction of the first bearing;
Rotation transmission shaft and the upper end is constrained to the upper rotary module and extends down;
Lower rotation including a second bearing coupled to the lower end of the rotation transmission shaft, the horizontal bearing can be rotated in the horizontal direction, and a horizontal motion plate coupled to the second bearing as a plate-like structure to rotate in the horizontal direction together with the second bearing. module;
As a restraint model test method of a single-acting sailing yacht having a keel using a restraint model test device of a single-acting sailing yacht having a keel,
Combining the model line coupling unit with the model line;
Rotating the first bearing in the lateral and longitudinal directions by a predetermined angle, and also rotating the second bearing in the horizontal direction by a predetermined angle;
The transverse social restraint unit fixing the tilted state of the transverse tilt movement axis, the longitudinal social restraint unit fixing the tilted state of the longitudinal tilt movement axis, and the horizontal rotation restraint unit fixing the rotated state of the horizontal exercise plate;
Measuring the hydrodynamic force and moment applied to the model ship by the load cell when water in the tank flows;
Restraint model test method of the single-acting sailing yacht having a keel comprising a. A fixed support shaft which is constrained and extended downward by an upper end;
It is coupled to the lower end of the fixed support shaft, the first bearing capable of rotation in the longitudinal and transverse inclination direction, and coupled to both sides in the transverse inclination direction of the first bearing in the transverse inclination direction with the rotation in the transverse inclination direction of the first bearing An upper rotating module including a transverse tilt axis inclined toward the cross section and a longitudinal tilt axis coupled to both sides of the first bearing in the longitudinal direction of the first bearing and inclined along the longitudinal direction of the first bearing;
Rotation transmission shaft and the upper end is constrained to the upper rotary module and extends down;
Lower rotation including a second bearing coupled to the lower end of the rotation transmission shaft, the horizontal bearing can be rotated in the horizontal direction, and a horizontal motion plate coupled to the second bearing as a plate-like structure to rotate in the horizontal direction together with the second bearing. module;
As a restraint model test method of a single-acting sailing yacht having a keel using a restraint model test device of a single-acting sailing yacht having a keel,
Combining the model line coupling unit with the model line;
Rotating the first bearing in a horizontal direction by a predetermined angle and also rotating the second bearing in a horizontal direction by a predetermined angle;
Fixing the inclined state of the transverse inclination movement shaft to the transverse tilt movement axis, and the horizontal rotation restraint portion to fix the rotated state of the horizontal movement plate;
Measuring the hydrodynamic force and moment applied to the model ship by the load cell when water in the tank flows;
Restraint model test method of the single-acting sailing yacht having a keel comprising a. A fixed support shaft which is constrained and extended downward by an upper end;
It is coupled to the lower end of the fixed support shaft, the first bearing capable of rotation in the longitudinal and transverse inclination direction, and coupled to both sides in the transverse inclination direction of the first bearing in the transverse inclination direction with the rotation in the transverse inclination direction of the first bearing An upper rotating module including a transverse tilt axis inclined toward the cross section and a longitudinal tilt axis coupled to both sides of the first bearing in the longitudinal direction of the first bearing and inclined along the longitudinal direction of the first bearing;
Rotation transmission shaft and the upper end is constrained to the upper rotary module and extends down;
Lower rotation including a second bearing coupled to the lower end of the rotation transmission shaft, the horizontal bearing can be rotated in the horizontal direction, and a horizontal motion plate coupled to the second bearing as a plate-like structure to rotate in the horizontal direction together with the second bearing. module;
As a restraint model test method of a single-acting sailing yacht having a keel using a restraint model test device of a single-acting sailing yacht having a keel,
Combining the model line coupling unit with the model line;
Rotating the first bearing in a longitudinal direction by a predetermined angle and also rotating the second bearing in a horizontal direction by a predetermined angle;
A longitudinal race social restraint unit fixing an inclined state of the longitudinal tilt movement axis, and the horizontal rotation restraint unit also fixes a rotated state of the horizontal exercise plate;
Measuring the hydrodynamic force and moment applied to the model ship by the load cell when water in the tank flows;
Restraint model test method of the single-acting sailing yacht having a keel comprising a.

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