JPS59226377A - Progressive wave generator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention improves a wave experiment device using a helical spring and a spherical gravity beam, thereby making it possible to generate traveling waves. Conventional wave experiment devices using helical springs and spherical weights have not been able to generate traveling waves.

The present invention uses spherical weights 1 arranged at equal intervals on a straight line,
Place a person between the cotton wires of the stretched helical spring 2, which has a diameter slightly smaller than that diameter, and tighten it from both sides using the elasticity of the cotton wires, so that the axial direction of the helical spring 2 is horizontal. In the wave experiment equipment.

A spherical damper 3 is attached to the bottom of several spherical weights 1 from one end.
This is a traveling wave generating device in which a 100% oscillator is attached and immersed in a highly viscous liquid, and the degree of oscillation is gradually reduced from the end.

Now apply a pulse wave to the spherical weight at the opposite end of the attached end of the allocator.

The wave is absorbed by the damper and there is no reflected wave, and when continuous simple harmonic motion is applied, a traveling wave with a sinusoidal waveform is generated. In this case, it is important that the damping force of the damper 3 is configured so that it becomes stronger stepwise toward the end.When the damping degree of the damping pendulum 3 is made almost equal, (viscosity at night or Dampener 3
Even if the zero volume is changed little by little, the reflection wave T1+y of the pulse wave cannot be avoided. In other words, reflected waves are generated both when the control level is weak and strong, and it is impossible to create a state in which there are no reflected waves in between. To give an example,
Mass of lead spherical weight 402 Diameter 18 Body 9 Spherical weight IWj
Distance: 40 crn Spherical 1 (The weight is suspended by a string, and its length is 600 m.) 5 weights of spherical wheel weights, The number of turns of cotton wire between the weights is 8 (excluding the 2 turns that securely attach the spherical weight).

The diameter of the spherical damper is 2 (l mm + the number of dampers is 4).

As the highly viscous liquid, water control water glass lubricating oil or the like is suitable. Since the viscosity of the liquid varies depending on the temperature, the attenuation curve shown in FIG. 3 is approximately an appropriate value, and in this way the viscosity of the liquid and the volume of the trill pendulum in the liquid are adjusted. When the viscosity of the liquid is strong (l-1, Y), dilute the lubricant oil with petroleum and dissolve the vaseline when it is weak. Dilute or boil the water syrup with water. The volume of a 1 liter pendulum in the liquid. To change the distance between the spherical weight and the damper, you can change the distance between the spherical weight and the damper using the screw that connects the spherical weight and the damper. No problem. Adjust in this way to create a state in which there is no reflected wave for the pulse wave, and apply continuous simple harmonic motion to the spherical weight at the end without the oscillation device in the direction of the axis of the helical spring and in the direction perpendicular to this. When given, continuous traveling waves of longitudinal waves and transverse waves are obtained.Also, when continuous circular motion is given instead of simple harmonic motion, each pendulum moves well in a circular motion, unlike the pulse wave when there is no oscillation device. Waves equivalent to surface waves can be obtained.

The effects of the present invention are as follows: 1) By gradually reducing the damping force of the damper from the end, reflected waves for pulse waves can be eliminated. 2) Continuous 111 vibrations are applied from one end of the damper and the other end to generate a traveling wave in the form of a sine wave. 3) Because the damper is spherical.

The resistance force received from the liquid is uniform regardless of direction.

Smooth allocation is possible. 4) Single-stranded glass: Waves equivalent to transverse waves and surface waves can be generated without changing the adjustment.

As a comparative example, a damping device using solid friction is described.The other conditions are the same as in the above example, and a spherical sponge is used. If you create a reduced version, you can create a state where there is no reflected wave for the pulse wave, but it is difficult to adjust the cycle, and with one line, 1l-j:!till 4Xi child's -
A small vibration enters H's spherical weight and string.

[Brief explanation of the drawing]

Fig. 1 is an elevational view showing one embodiment of the present invention, Fig. 2 is an enlarged elevational view of the allocation device (6), and Fig. 3 is an elevation view showing an appropriate damping jW of each damper. This is an example of a damping curve. ■... Spherical weight, 2... Round coil spring,
3... Spherical vibration damper, 4...°Liquid tank cited literature special publication 1977-7932

Claims (1)

[Claims] Spherical weights 1 arranged at equal intervals are placed between the threaded ends of stretched helical springs 2 whose wear is slightly smaller than their diameters, and tightened from both sides by the elasticity of the cotton wire. A wave 4b with the axial direction of the helical spring 2 horizontal
In the experimental apparatus, a spherical damper 3 was attached to the bottom of several spherical eIFs from one end, and this was swung into a highly viscous liquid, so that the damping and absorption was gradually reduced from the end. traveling wave generator.