“Wandering” eigenfrequencies of a two-dimensional elastic body with a blunted cusp
С. А. Назаров · Doklady Physics · 2017
At the pointed cusp of a two-dimensional plate, a tip of small length h is broken off. By means of asymptotic analysis, a new effect of “wandering” of eigenfrequencies of longitudinal vibrations of the plate with the blunted cusp is found: as h → +0, the frequencies prove to be almost periodic functions in the logarithmic scale ln h ; i.e., when the fragment length decreases, they chaotically move at a high speed O ( h −1 ) along the real semi-axis (κ † , +∞), while κ † > 0 is the cutoff point of the continuous spectrum of the problem with an ideal cusp.