JP5668309B2 - Vehicle tank test equipment - Google Patents

Description

  The present invention relates to a vehicle aquarium test apparatus for running a vehicle model in water in a water tank and measuring a force acting on the vehicle model, a motion of the vehicle model, and the like.

  Railway vehicles (vehicles) may be subjected to resistance or vibration due to hydrodynamic action from the air during travel. In order to improve the performance of railway vehicles, it is important to develop a shape that reduces air resistance and suppresses vibration. Wind tunnel tests are conducted to understand the hydrodynamic effects on railway vehicle shape and running conditions.

  However, in the wind tunnel test, it is necessary to test with a scale model (scale model) of the same size as an actual machine (such as an actual railway car) or about half the size of the actual machine in order to match the Reynolds number of the running conditions of the railway vehicle. Therefore, a large wind tunnel facility is required and the test is relatively expensive.

  In wind tunnel tests, it is known that a boundary layer develops on the floor, resulting in test conditions that are different from those of actual aircraft running on orbit. In order to eliminate the influence of this boundary layer, for example, in the measurement of an automobile, a test may be performed with a wind tunnel facility equipped with a moving belt. However, when trying to reproduce the trajectory, it is difficult to test even with the moving belt method.

  As a method for solving these problems, for example, there is a test method using a water tank described in Patent Documents 1 and 2, for example. In the test method using a water tank, it is possible to match the Reynolds number with the actual machine even with a scale model with a relatively large reduction ratio by utilizing the difference in kinematic viscosity coefficient between water and air, and a vehicle model that runs on the track model This is an excellent test method that does not require the use of a moving belt or the like because the fluid force is applied to the vehicle model by pulling on the vehicle.

Japanese Patent No. 3051332 JP-A-6-241949

  However, in the test methods described in Patent Documents 1 and 2, etc., since the vehicle model is coupled to the towing vehicle via a hanging jig, the movement of the vehicle itself cannot be reproduced. That is, since the movement of the vehicle model can be limited by the hanging jig, it is difficult to accurately reproduce the movement of the vehicle itself.

  In addition, in the test methods described in Patent Documents 1 and 2, etc., it is possible to perform a test in a state where the vehicle travels along a track in an open space, but the vehicle travels in a tunnel or the like. When performing a test in such a state, the hanging jig needs to pass through the ceiling of the tunnel model, which is difficult to apply. In other words, when the suspension jig penetrates the ceiling of the tunnel model, the suspension jig or the penetration part of the tunnel model can affect the flow of water in the tunnel model. It is difficult to accurately reproduce the movement.

  In addition, the conventional test method using a water tank including the test methods described in Patent Documents 1 and 2 does not consider the ground contact force of the vehicle model for the vehicle motion, and the motion of the vehicle itself is accurate. May not be reproducible.

  Therefore, an object of the present invention is to test not only a vehicle traveling along a track in an open space, but also a vehicle traveling in a tunnel or the like, and adjusting a ground contact force of a vehicle model. Accordingly, an object of the present invention is to provide a vehicle tank test apparatus that can accurately reproduce the motion of the vehicle itself.

In order to achieve the above object, the present invention provides a track base disposed in water in a water tank, a track model installed in the track base, and capable of traveling in the water in the water tank along the track model. Vehicle tank test apparatus comprising: a vehicle model, a kite cable connected to a front end of the vehicle model, and driving means for causing the vehicle model to travel along the track model by pulling the kite cable , A plurality of magnets are arranged on the track base at equal intervals along the longitudinal direction so that the ratio of the grounding force of the vehicle model to the specific gravity of water matches the ratio of the grounding force of the actual machine to the specific gravity of air. In addition, a magnet is disposed on the vehicle model so as to face the track-based magnet with a different polarity .

  The magnet may be a permanent magnet or an electromagnet.

  The vehicle model may have a low floor portion having wheels and an outer shape portion connected to the low floor portion via a shock absorber.

  You may further provide the tunnel model installed in the said track base.

  According to the present invention, not only a test of a vehicle traveling along a track in an open space, but also a test of a vehicle traveling in a tunnel or the like can be performed, and by adjusting the ground contact force of the vehicle model The vehicle tank test apparatus capable of accurately reproducing the motion of the vehicle itself can be provided.

FIG. 1 (A) is a side view showing an outline of the vehicle tank test apparatus according to the first embodiment of the present invention. FIG. 1B is a cross-sectional view taken along line AA in FIG. FIG. 2 is a side view showing an outline of the vehicle water tank test apparatus according to the second embodiment of the present invention.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  First, a first embodiment will be described with reference to FIG.

  As shown in FIG. 1A, a railway vehicle tank test apparatus (vehicle tank test apparatus) 1 according to this embodiment includes a water tank 3 for storing water, and a track base 4 provided in the water in the water tank 3. The track model 5 installed on the track base 4, the railway vehicle model (vehicle model) 6 capable of traveling in the water in the aquarium 3 along the track model 5, and the towing line 7 connected to the rail vehicle model 6 And a driving means 8 for causing the railcar model 6 to travel along the track model 5 by pulling the rod retracting line 7. Moreover, the railway vehicle tank testing apparatus 1 according to the present embodiment further includes a tunnel model 9 installed on the track base 4. In addition, the code | symbol 10 shows the water surface in FIG.

  The track base 4 of the present embodiment is formed in a substantially rectangular plate shape in plan view. In addition, the track base 4 of the present embodiment is suspended from a base (not shown) spanned between the side walls 11 of the water tank 3 via a support member 12, and the underwater in the water tank 3 below the water surface 10. It is arranged.

  The track model 5 of the present embodiment imitates a track (rail) on which an actual railway vehicle (vehicle) travels, and is a model obtained by reducing the track on which an actual rail vehicle travels at a predetermined scale. In the present embodiment, the track model 5 is installed on the upper surface of the track base 4.

  The railway vehicle model 6 of this embodiment is a model imitating an actual railway vehicle, and is a model obtained by reducing an actual railway vehicle at a predetermined scale. As shown in FIG. 1B, the railcar model 6 of the present embodiment includes a low floor portion 13 that travels on the track model 5, and a load cell (load meter) 14 and a shock absorber (buffer) on the low floor portion 13. The outer shape part 16 is connected via a device 15. The low floor portion 13 includes a base portion 18 on which a measuring device (computer or the like) 17 is mounted, a bearing portion 19 provided at a lower portion of the base portion 18, an axle 20 rotatably supported on the bearing portion 19, and an axle. 20 and wheels 21 fixed to both ends. The outer shape portion 16 is shaped to cover at least the base portion 18 of the low floor portion 13. As the shock absorber 15, for example, an elastic body shock absorber using a spring or the like, a hydraulic shock absorber, or a pneumatic shock absorber can be used.

  In this embodiment, a plurality of G sensors (accelerometers) or pressure sensors 22 are mounted on the outer portion 16 of the railway vehicle model 6. Further, the load cell 14 between the low floor portion 13 and the outer shape portion 16 of the railway vehicle model 6, and the G sensor or the pressure sensor 22 mounted on the outer shape portion 16 are connected to the measuring device 17 mounted on the low floor portion 13. The measurement values of the load cell 14, the G sensor or the pressure sensor 22 are transmitted to the measuring device 17 through the cables 23 and 24.

  The railcar model 6 has a structure that allows movement of the outer portion 16 by a shock absorber 15 provided between the low floor portion 13 and the outer portion 16 of the railcar model 6. By mounting the G sensor or the pressure sensor 22, it is possible to measure the movement of the railway vehicle model 6 (outer part 16) using the G sensor or the pressure sensor 22.

  As shown in FIG. 1 (A), in this embodiment, a plurality of railway vehicle models 6 (three in the illustrated example) are connected, and the leading railway vehicle among the plurality of connected railway vehicle models 6 is shown. Reeds 7 are connected to the front end portion of the model 6 (outer shape portion 16) and the rear end portion of the rearmost railway vehicle model 6 (outer shape portion 16). Further, the rod retracting line 7 is stretched over a plurality of pulleys 25 (two in the illustrated example) that are rotatably mounted at intervals in the longitudinal direction of the support member 12.

  The driving means 8 of the present embodiment has a towing vehicle 27 that can travel along a towing vehicle track 26 that is spanned between the side walls 11 of the water tank 3. The towing vehicle track 26 is disposed in parallel with the track model 5. In the present embodiment, the towing line 7 is connected to the towing vehicle 27 via the load cell 28. Although not shown, the measuring device (computer or the like) of the load cell 28 is mounted on the towing vehicle 27. By connecting the towing line 7 and the towing vehicle 27 with the load cell 28, it is possible to measure the external force acting on the railway vehicle model 6 using the load cell 28.

  The tunnel model 9 of the present embodiment is a model imitating a tunnel (internal structure) in which an actual railway vehicle travels, and is a model obtained by reducing the tunnel (internal structure) in which an actual railway vehicle travels at a predetermined scale. . In this embodiment, the tunnel model 9 is disposed on the upper surface of the track base 4 so as to cover most of the track model 5 (more than half of the track model 5). The tunnel model 9 may be disposed on the upper surface of the track base 4 so as to cover a part of the track model 5 (for example, less than half).

  In the railway vehicle tank testing apparatus 1 according to the present embodiment, magnets 29 and 30 are provided on the track base 4 and the railway vehicle model 6, respectively, in order to adjust the grounding force of the railway vehicle model 6. As the magnets 29 and 30, permanent magnets (for example, neodymium magnets) or electromagnets can be used. The magnet 29 arranged on the track base 4 and the magnet 30 arranged on the railway vehicle model 6 are set so as to face each other with different polarities (in the example shown, the magnet 29 is N pole and the magnet 30 is S pole). (See FIG. 1B).

  In the railway vehicle tank test apparatus 1 (railway vehicle tank test method) according to the present embodiment, when permanent magnets are used as the magnets 29 and 30, the number of permanent magnets disposed on the track base 4 and the railway vehicle model 6 is increased or decreased. Alternatively, it is conceivable to adjust the grounding force of the railway vehicle model 6 by changing the positions of the permanent magnets disposed on the track base 4 and the railway vehicle model 6. Further, in the case where electromagnets are used as the magnets 29 and 30, it is considered that the grounding force of the railcar model 6 is adjusted by increasing / decreasing the magnitude of the current passed through the electromagnets disposed on the track base 4 and the railcar model 6. It is done.

  In the illustrated example, the magnet 30 is disposed on the outer shape portion 16 of the railcar model 6, but the magnet 30 may be disposed on the low floor portion 13 of the railcar model 6. Further, the measuring device 17, the load cell 14, the G sensor or pressure sensor 22, the cables 23 and 24, etc. are magnetically shielded (not shown) so as not to be affected by the magnetic force of the magnets (permanent magnets or electromagnets) 29 and 30. It is preferable to protect it magnetically.

  Next, the operation of this embodiment will be described.

  In the railway vehicle tank test apparatus 1 according to the present embodiment, the towline 7 connected to the front end portion of the leading railway vehicle model 6 by the towed vehicle 27 by running the towed vehicle 27 on the towed vehicle track 26. By pulling, the railway vehicle model 6 travels in the water in the water tank 3 along the track model 5. And since the rear end part of the last railway vehicle model 6 and the towing vehicle 27 are connected by the towline 7, the towline 7 connected to the rear end part of the last railcar model 6 is used. The railway vehicle model 6 can be decelerated and the traveling speed of the railway vehicle model 6 can be stabilized.

  According to this embodiment, the track base 4 disposed in the water in the aquarium 3, the track model 5 installed in the track base 4, and the railway that can travel in the water in the water tank 3 along the track model 5. A vehicle model 6, a towing line 7 connected to the front end of the railway vehicle model 6, and a driving means 8 (a towing vehicle) that causes the railway vehicle model 6 to travel along the track model 5 by pulling the towing line 7. 27), the railway vehicle tank test apparatus 1 is configured, so that the railway vehicle model 6 can move under the action of fluid force during traveling. Furthermore, since the railway vehicle model 6 is towed by the towing line 7 connected to the front end portion of the railway vehicle model 6, not only the test of the vehicle traveling along the track in the open space but also the inside of the tunnel or the like. It is also possible to test a vehicle that does this.

  In addition, according to the present embodiment, the magnets 29 and 30 are disposed on the track base 4 and the railroad vehicle model 6, so that the railcar model 6 is grounded for the installation of the railroad vehicle model 6 on the track model 5. In order to match the ratio of the force and the specific gravity of water to the ratio of the ground force of the actual machine (actual railway vehicle) and the specific gravity of air, the railway vehicle is magnetized by the magnets 29 and 30 grounded to the track base 4 and the railway vehicle model 6. The contact force of the model 6 can be adjusted. Accordingly, the ratio of the ground contact force of the railway vehicle model 6 to the specific gravity of water can be easily matched to the ratio of the ground contact force of the actual machine to the specific gravity of air even in water, and the motion of the vehicle itself can be accurately reproduced. It becomes.

  In addition, according to the present embodiment, the magnets 29 and 30 are permanent magnets or electromagnets. Therefore, in the case of permanent magnets, the number and position of the permanent magnets are changed. By changing the height, the grounding force of the railway vehicle model 6 can be easily adjusted.

  Moreover, according to this embodiment, the railway vehicle model 6 includes the low floor portion 13 having the wheels 21 and the outer shape portion 16 connected to the low floor portion 13 via the shock absorber (shock absorber) 15. Therefore, the railcar model 6 has a structure in which the motion of the outer portion 16 is allowed by the shock absorber 15 provided between the low floor portion 13 and the outer portion 16 of the railcar model 6. By attaching the G sensor or the pressure sensor 22 to the outer shape part 6 of 6, the movement of the railcar model 6 (outer part 16) can be measured.

  Moreover, according to this embodiment, since the railway vehicle tank test apparatus 1 is configured with the tunnel model 9 installed on the track base 4, by causing the railway vehicle model 6 to travel in the tunnel model 9, It is possible to test a vehicle traveling in a tunnel.

  Next, a second embodiment will be described with reference to FIG. In addition, the same code | symbol is attached | subjected about the component similar to 1st embodiment shown in FIG. 1, and the description is abbreviate | omitted.

  As shown in FIG. 2, in the railcar tank test apparatus 2 according to the second embodiment, the track model 5 and the railcar model 6 are upside down. That is, in the railway vehicle tank test apparatus 2 according to the second embodiment, the track model 5 and the tunnel model 9 are installed on the lower surface of the track base 4, and the train vehicle model 6 is configured such that the wheels 21 face upward. The track model 5 is arranged. When the top and bottom of the track model 5 and the railcar model 6 are reversed, it is conceivable that the railcar model 6 is made of a material having a relatively large buoyancy (for example, urethane resin). Further, the grounding force of the railway vehicle model 6 can be adjusted by the magnets 29 and 30 disposed on the track base 4 and the railway vehicle model 6.

  According to the second embodiment, it is possible to obtain the same effects as the first embodiment.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiments, and various other embodiments can be adopted.

  For example, in the above-described embodiment, the magnets 29 and 30 are disposed on both the track base 4 and the railcar model 6, but the magnets 29 and 30 are disposed on one of the track base 4 and the railcar model 6. The other side may be provided with a magnetic member (not shown) made of a magnetic material, or the other may be made of a magnetic material such as iron. Further, the shock absorber (buffer) 15 may be omitted, and the outer portion 16 may be directly connected to the low floor portion 15.

  Further, in the above embodiment, the rod retracting cable 7 is connected to the front end portion of the railway vehicle model 6 (the front end portion of the leading railway vehicle model 6 when a plurality of railway vehicle models 6 are connected) and the rear of the railway vehicle model 6. The end portion (when a plurality of railcar models 6 are connected to each other, the rear end portion of the last railcar model 6) is connected to each other. When a plurality of vehicle models 6 are connected, they may be connected only to the front end portion of the leading railway vehicle model 6.

  In the above-described embodiment, the towline 7 is connected to the towing vehicle 27 and the towline 7 is pulled by running the towed vehicle 27. However, the method of pulling the towline 7 is limited to this. Not done. For example, a method of pulling the rod retracting line 7 by connecting the rod retracting line 7 to a motor (not shown) and winding the rod retracting line 7 by the motor can be considered. That is, the drive means 8 may have a motor instead of the towing vehicle 27.

1, 2 Rail car tank testing equipment (vehicle tank testing equipment)
3 Water tank 4 Track base 5 Track model 6 Railway vehicle model (vehicle model)
7 Towing line 8 Driving means 9 Tunnel model 13 Low floor 15 Shock absorber (buffer)
16 Outline part 21 Wheel 29, 30 Magnet

Claims (4)

A track base disposed in water in the aquarium, a track model installed on the track base, a vehicle model capable of traveling in the water in the water tank along the track model, and a front end of the vehicle model In a vehicle aquarium test apparatus comprising: a connected anchor pulling line; and a driving means for causing the vehicle model to travel along the track model by pulling the anchor pulling line, the grounding force of the vehicle model and the specific gravity of water Are arranged at equal intervals along the longitudinal direction so that the ratio between the ground contact force of the actual machine and the specific gravity of the air matches the ratio of the actual gravity. A vehicle aquarium test apparatus, which is disposed so as to be opposed to the magnet of a different polarity .   The vehicle aquarium test apparatus according to claim 1, wherein the magnet is a permanent magnet or an electromagnet.   The vehicle tank test apparatus according to claim 1 or 2, wherein the vehicle model includes a low floor portion having wheels and an outer shape portion connected to the low floor portion via a shock absorber.   The vehicle aquarium test apparatus according to any one of claims 1 to 3, further comprising a tunnel model installed on the track base.

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