JP2001108574A - Towing test apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a towing test apparatus enabling a model test for towing of a high speed vessel even in a short water tank, providing highly accurate measurement data, and also enabling a model test for the takeoff and landing of a flying boat. SOLUTION: The apparatus for conducting a high-speed towing test on a subject 1 to be towed which is a model of a vessel or marine structure floated within a water tank 2 includes: a water tank 2 for floating the subject 1 to be towed thereon; a guide device 3 provided above the water tank 2 along the longitudinal direction of the water tank 2; a towing box 4 hung on the guide box 3 for towing the subject 1 to be towed; a control means 5 for controlling a driving force which causes the towing box 4 to travel; a variety of measuring instruments mounted on the subject 1 to be towed; and transmission means 6a, 6b for transmitting and receiving data from the variety of measuring instruments and control signals from the control means 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a towing test apparatus, and more particularly, to a towing test apparatus for performing a towing model test for a high-speed ship and a take-off and landing model test for a flying boat.

[0002]

2. Description of the Related Art Towing model tests are conducted on ships and marine structures using a water tank before the actual machine is manufactured. In a conventional towing test apparatus for performing a towing model test, a towing vehicle is arranged so as to straddle both rails provided on both side walls of a water tank, and the towing vehicle travels on the rails. A towed model ship (towed object) is towed, and various towing test data are measured.

[0003] The towing model test includes an acceleration state in which the towing vehicle is started from one end of the water tank and accelerates to a predetermined speed, a steady state in which the towing vehicle runs at a constant speed, and a deceleration / stop of the towing vehicle. It consists of three stages in a decelerating state, and measurement of various data is performed in a steady state.

In order to increase the reliability of data obtained by measurement, it is important to increase the steady state time as much as possible and to increase the data measurement time.
The data measurement time (steady state time) in the towing model test depends on the acceleration / deceleration performance of the towing vehicle and the length of the water tank, and the maximum towing speed depends on the maximum speed of the towing vehicle.

[0005] However, the conventional towing test apparatus has a drawback that acceleration and deceleration performance is poor because the towing vehicle is heavy, and when a high towing speed is required, it takes time to accelerate and decelerate. Consequently, the steady state time could not be taken too long.

For this reason, in the conventional towing test apparatus, a steady state time can be obtained by suppressing the towing speed and shortening the time required to reach a constant speed by using a towing test apparatus having a long water tank. I try to be as long as possible.

In recent years, speeding up of ships has been required, and demand for high speed ships has been increasing. Therefore, there is a demand for a towing test device capable of performing a towing model test of a high-speed ship or the like.

[0008]

However, in order to enable a towing model test of a high-speed ship or the like in a towing test apparatus, a method using a small model (enlarging the scale of reduction of the model) is required. Only one can deal with it.

In the case of a method using a towing test device having a long water tank (for example, 200 m or more), the size and cost of the towing test device are increased, and the size of the towing test device is reduced due to the installation space. When only a device (short tank) can be installed, there is a problem that a towing model test of a high-speed ship cannot be performed.

In the method of increasing the scale of the model, the larger the scale, the lower the towing speed required for the test. It can be performed. However, in this case, there is a problem that the accuracy of the obtained measurement data is reduced, and the reliability of the data is reduced.

Further, when it is desired to conduct a watercraft takeoff / landing model test using a conventional towing test apparatus using a towing vehicle, the towing position of the towed object 1 (the height in a direction perpendicular to the water surface) during towing. Needs to be adjusted over a wide range,
As described above, since the tow truck is heavy, it is impossible to adjust the towing position over a wide range.

Accordingly, the present invention solves the above-mentioned problems, and enables a towing model test of a high-speed ship with a short water tank, high accuracy of measurement data, and a towing test model of a flying boat. It is to provide a device.

[0013]

In order to solve the above problems, the invention of claim 1 is directed to an apparatus for towing a towed object, which is a model such as a ship or an offshore structure, floating in a water tank at a high speed. A water tank for floating the towed object,
Above the water tank, a guide device provided along the longitudinal direction of the water tank, a towing box suspended from the guide device and towing the towed object, and control means for controlling a driving force for running the tow box. And a measuring device mounted on the object to be towed, and a transmission means for transmitting and receiving data from the various measuring devices and a control signal from the control means.

According to the above construction, the towing box for towing the towed object is smaller and lighter than the conventional towing vehicle, so that it has excellent acceleration / deceleration performance, and is capable of towing a high-speed ship even in a short water tank. Model testing becomes possible. Further, since the towing speed can be increased, it is not necessary to use a model having a large scale, and data can be measured with high accuracy.

The invention according to claim 2 is characterized in that the towing box includes:
2. The towing test apparatus according to claim 1, further comprising a vertical movement means for freely moving the towing box in a direction perpendicular to the water surface.

According to the above configuration, since the tow box is small and lightweight, and is suspended from the guide device, the tow box can be easily and vertically extended to the water surface over a wide area. It can be moved, and it can perform not only a towing model test of a high-speed ship but also a take-off and landing model test of a flying boat.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a schematic diagram of the towing test apparatus of the present invention.
FIG. 2 shows a partially enlarged view of FIG. Here, FIG. 1A shows a side view, and FIG. 1B shows a top view.

As shown in FIGS. 1 and 2, the towing test apparatus of the present invention comprises a water tank 2 for floating a towed object (a flying boat in FIGS. 1 and 2), and a water tank 2 above the water tank 2. A guide device 3 provided along the longitudinal direction of the water tank 2;
A towing box 4 that is suspended from
Control means 5 for controlling the driving force for driving the towing box 4; various measuring instruments mounted on the towed object 1; and transmission means 6a for transmitting and receiving data from the various measuring instruments and control signals from the control means 5; 6b.

A wave-making device 11 is provided at an end of the water tank 2 in the traveling direction (right direction in FIG. 1) of the towed object 1, and a wave-making device 11 is provided at an end of the water tank 2 in the traveling direction (left direction in FIG. 1). A wave-dissipating beach 12 is provided. In addition, a fixed wave height meter 13a, 1 for measuring the wave height is provided at an arbitrary position in the water tank 2.
3b is provided.

The guide device 3 is located above the water tank 2 and
A rail 21 provided along the longitudinal direction;
Front and rear bogies 22 and 23 suspended on the rails, guide pulleys 24a and 24b provided at both ends of the rail 21,
The rear bogies 22 and 23 are connected with a predetermined gap therebetween, and the timing belt 25 stretched between the guide pulleys 24a and 24b, a driving unit 26 for rotating the timing belt 25 to run, and the movement of the rear bogie 23 And a power line 27 stretched along the rail 21 so as to follow the power line.

The towing box 4 is supported by support means 23a attached to the rear carriage 23, and is rotatably provided with respect to a rod 22a attached to the front carriage 22. The support means 23a and the towing box 4
The connection portion is provided with a balance adjusting means 32 for adjusting the center of gravity of the towing box 4 and a vertical movement means 33 for moving the towing box 4 in the vertical direction of the water surface. Further, the inside of the towing box 4 is vertically separated into two chambers, and the upper chamber 4a is a space for mounting the wave height meter 34 and various measuring instruments (not shown; current meter, amplifier, etc.). The lower chamber 4b is a space for the gimbal joint 35.

The towing box 4 and the towed object 1 are connected via a gimbal joint 35. Gimbal joint 35
The shaft 42 supported on the towing box 4 perpendicular to the water surface, the shaft 43 perpendicular to the shaft 42 and supported in the longitudinal direction of the rail 21, and the shaft 42 and the shaft 43 A shaft 44 supported vertically, a counterweight 36 provided at one end (right end in FIG. 2) of the shaft 43,
The other end (the left end in FIG. 2) of the shaft 43 is constituted by a shaft 46 supported vertically to the water surface, and the towed object is attached to the water surface side end (the lower end in FIG. 2) of the shaft 46. 1 is movably connected.

Here, the balance adjusting means 32 is not particularly limited, but may be a method of slidingly adjusting the entire towing box 4 in the longitudinal direction of the rail 21 or a method of adjusting a balancer (not shown) by sliding in the longitudinal direction of the rail 21. Any method may be used. The vertical movement means 33
Is not particularly limited, for example, rack &
A pinion, a screw and the like.

The transmission means 6a and 6b are not particularly limited, and include, for example, a PCM telemeter.

Note that limit switches 28a and 28b as safety devices are attached to both ends of the rail 21 in the longitudinal direction (left and right ends in FIG. 2). Front and rear trolley 2
The control belts 2 and 23 are adapted to travel between limit switches 28a and 28b, and to stop the rotation of the timing belt when the front and rear bogies 22 and 23 touch the limit switches 28a and 28b. Have been.

Next, a description will be given of a model test for taking off and landing on a flying boat using the towing test apparatus of the present invention.

First, prior to the test, necessary measuring instruments (pressure gauge 51, accelerometer 52, inclinometer 53, etc.) are mounted on the towed object 1 and the towing box 4 is mounted on the upper chamber 4a of the towing box 4. And various necessary measuring instruments (wave height meter 34, current meter, amplifier, etc.).

Next, the towing box 4 and the towed object 1 are connected via a gimbal joint 35 and the balance adjusting means 32 is connected.
By adjusting the vertical movement means 33, the posture of the towing box 4 and the object 1 is kept horizontal.

The driving motor 26a of the driving means 26 is rotated to rotate the timing belt 26b (counterclockwise in FIG. 2), and the timing belt 25 is moved in a predetermined direction (left in FIG. 2) via the guide pulley 24b. Around).

The rotation of the timing belt 25 causes the front bogie 22 and the rear bogie 23 to travel along the longitudinal direction of the rail 21 (to the right in FIG. 2). At this time, the power line 27 follows the movement of the rear bogie 23.
, The power of the towing box 4 can be stably secured.

When the towing box 4 supported by the rear bogie 23 via the support means 23a is towed by the front bogie 22 via the rod 22a, the towed object 1 is towed on the water surface. Here, the towed object 1 has a yawing balance by the shaft 42, a rolling balance by the shaft 43,
Since the pitching balance is adjusted by the shaft 44, the boat is towed on the water surface in a stable posture.

At this time, the total weight of the front and rear bogies 22 and 23 and the towing box 4 in the towing test device of the present invention is significantly lighter than that of the conventional towing test device. It is very excellent in deceleration performance, and can obtain large acceleration / deceleration and high towing speed with small electric power (for example, about 1 kW). For this reason, due to the installation space, a water tank that is about half as short as a conventional towing test device having a long water tank (for example, about 100
m) Even if only 2 can be installed, a high-speed towing model test can be performed, and equipment costs can be reduced.

Further, the time required to accelerate the front and rear bogies 22, 23 and the towing box 4 to a predetermined speed and the time required to decelerate and stop the vehicle from the predetermined speed are significantly reduced. , It is possible to increase the steady state time (data measurement time),
The accuracy of the measurement data increases.

Further, since a high towing speed can be obtained, a towing model test using a large towed object 1 (model) can be performed, so that the accuracy of the measurement data is further improved.

Various measurement data (such as the inclination of the towed object 1, the pressure applied to the towed object 1 from the water,
The acceleration of the towed object 1 and the wave height) are determined by the transmission means (PCM
PCM transmission from the towing box 4 to the control means 5 is performed in real time by the telemeters 6a and 6b. Based on the various measurement data transmitted in real time, the measurement data is compared with the input data input in advance,
The control means 5 controls the rotation speed of the drive motor 26a.

When the towing speed of the towed object 1 reaches a predetermined speed, the towed object 1 is separated by raising the tow box 4 by operating the vertical movement means 33. When landing,
Activating the vertical movement means 33 to lower the towing box 4 causes the towed object 1 to land. This desorption water model test may be repeated as appropriate. By operating the wave making device 11 as needed, a model for taking off and landing a watercraft on a flying boat in waves is possible.

At this time, since the towing box 4 in the towing test device of the present invention is significantly lighter and smaller than the towing vehicle of the conventional towing test device, the towing box 4 can be easily moved over a wide area by the vertical movement means 33. Up and down.

Thereafter, the towed object 1 is towed for a while, and when the towed object 1 passes a predetermined position in the water tank 2, the control means 5 controls the number of rotations of the drive motor 26a to slow down the rotation of the timing belt 25. , Set to deceleration state. One towing model test ends when the towed object 1 completely stops. Thereafter, the drive motor 26a is rotated in the reverse direction to rotate the timing belt 25 in the reverse direction (clockwise in FIG. 2), thereby moving the front bogie 22 and the rear bogie 23 in the reverse direction of the rail 21 (in FIG. (Left direction) to prepare for the next towing model test.

Although a flying boat is used as the towed object 1 in FIGS. 1 and 2, the towing test apparatus of the present invention is
Needless to say, a towing model test of a high-speed ship or a normal ship / offshore structure can be performed. In that case, the operation of the vertical movement means 33 is not required.

[0041]

In summary, according to the present invention, a towed object having excellent acceleration / deceleration performance and the highest speed can be obtained by towing an object to be towed using a lightweight and small tow box suspended from a guide device. Even if only a short water tank can be installed due to the installation space, the data can be measured for a long time, a high-speed towing model test can be performed, and the accuracy of the measurement data is enhanced.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a towing test device of the present invention.

FIG. 2 is a partially enlarged view of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Towed object 2 Water tank 3 Guide device 4 Towing box 5 Control means 6a, 6b Transmission means

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Seiya Yamashita 1 Shin-Nakahara-cho, Isogo-ku, Yokohama-shi, Kanagawa Prefecture Ishikawashima-Harima Heavy Industries Co., Ltd. Machinery and Plant Development Center (72) Inventor Tsutsuyoshi Hirayama Yokohama-shi, Kanagawa 3-8-4- Namiki, Kanazawa-ku 204 F term (reference) 2G023 BA03 BB21 BB28 BB35 BB50 BD01

Claims (2)

[Claims] An apparatus for towing a towed object, which is a model such as a ship or an offshore structure, floated in a water tank at a high speed, comprising: a water tank for floating the towed object; and a water tank above the water tank. A guide device provided along the longitudinal direction of the tow, a tow box suspended from the guide device and towing the towed object, a control means for controlling a driving force for running the towed box, and the towed object A towing test apparatus comprising: mounted various measuring devices; and transmission means for transmitting and receiving data from the various measuring devices and a control signal from a control means. 2. The towing test apparatus according to claim 1, wherein the towing box is provided with up-and-down movement means for freely moving the towing box in a direction perpendicular to the water surface.