Bend effect on vibration pattern

V.2 No 1	97
Bend effect on vibration pattern





In Fig. 11 one of typical patterns of vibration process is shown for the positive and negative bend angles dependently on the external force action direction. It is visual in it that with quite small before-the-bend vibration amplitudes, in the bend region there forms a complicated vibration process with the inflections (Fig. 11 b, c), with breaking of the wave process continuity being generally different for the positive and negative bend angles and relating geologically to the charriages, and when excess of the rock strength – to the faults. The wave process amplitude depends essentially on the external excitation frequency and the bend angle. Particularly, in complete correspondence to Haug’s description given in the introduction, the steeper the mountain range inflects and the closer to the normal the front of coming seismic wave is, the faster amplitude grows when transiting through the bend.