A QUASIFRONT IN THE PROBLEM OF THE ACTION OF AN INSTANTANEOUS POINT IMPULSE AT THE EDGE OF A CONICAL SHELL

The problem of the effect of a longitudinal point impulse at the edge of a thin conical shell is considered. The motion of the shell is desc ribed by two-dimensional equations corresponding to the second low-fre quency long-wavelength approximation in the theory of elasticity. They are investigated using the matched asymptotic expansion method. The q uasifront phenomenon in the theory of two-dimensional shells is treate d as a boundary layer in the neighbourhood of a subcharacteristic.