The attenuation coefficient is so small that it is possible to neglect them. Practically, going to the stability supply, it is possible to measure the amplitude of the oscillations AT at a certain distance from the source of oscillations.
The use of the indicated formulas is possible only in the absence of resonance in the very mass of the soil surrounding the source of oscillations.
With resonance, a sharp change in the amplitudes of oscillations is obtained when the source fluctuations change. On one of the forested factories near Arkhangelsk by research by the Simological Institute of the Academy of Sciences in 1931. It was found that when switching working sawmills from the period t = 0.26 sec. for the period t = 0.17 sec. The amplitude of the oscillations of the foundation of the sawmill (in this case, the sources of oscillations) increased 2.5 times, while the amplitude of the vibrations of the boiler house increased by 7 times. Such an increase in the amplitude of the oscillations clearly indicates the presence of a resonance phenomenon.
It is possible to deal with this or a decrease in the number of speeds of the sawmill or an increase in the mass of the foundations of the boiler room. The values of the vibrations of the boiler installation were measured: during the period t = = 0.27, the amplitude in the horizontal direction, in the period g = 0.17 amplitude l2 = 43.0- 10 ~ 3 mm mm.
Knowing the magnitude of the amplitude of the oscillations and the period of oscillations, it is easy to calculate the acceleration that undergoes this structure or soil.
In addition to the Merkall-Konkani scale, there is a scale that evaluates the power of concussions, proportional to the work, which goes to overcome the attenuation attributed to a unit of mass, t. e. the size of 1 A2P, where A is the amplitude, P is the number of oscillations, or the size:
A large number of heavy trucks passes along the Street of the Blood Message of Berlin – Gildesheim. The road passes along the marshy soil. When observing the concussions caused by such a movement, the acceleration and the period of oscillations were determined, by which the corresponding coefficient of concussion 7. For this case, the concussion belonged to the fourth and even sixth degree, and even the concussions of the fourth degree were recognized as so significant that they required a number of devices to eliminate them.
For comparison, we give the results of the testing of concussions in the class I wagon of the soon train, which, in a period of 7.3 gear and amplitude 0.01 cm, belong to the fifth degree. All this forces us to recognize an unacceptable concussion of the fourth degree.