frequency the device for generation of vibrations in accordance with present invention has to have the corresponding angle u03b8 of taper 16 fig2 on the lower end of said device determined in accordance with the following formulae where u03b8 is the angle of taper on lower end of the plunger u03c6 is a slippage of the fracturing fluid between the elongated cylinder and plunger no dimensional sh is strouhal number l s is the length of stroke of the pumping means d t is the diameter of plunger d r is the diameter of pumping means f r is the resonant frequency u03b4t is the discharging time of compressed liquid for instance for the following parameters d 1 0 08255 m u03c6 0 1 sh 0 21 d r 0 0254 m l s 2 8 m u03b4t 0 25 sec and resonant frequency f r 38 hz the corresponding angle u03b8 of taper 16 equals 36 u00b0 meanwhile the length l of taper 16 on the lower end of plunger 4 is determined by the following expression where l is length of taper on the lower end of plunger d t is the diameter of plunger u03b8 is the angle of taper on lower end of the plunger thus for above noted parameters d 1 0 08255 m and u03b8 36 u00b0 the.