Influence of the environment dynamics on combination resonances in vertical motion of shaft vehicles

In this paper the influence of the environment (guides) dynamics on the combination resonances of eigenfrequencies is investigated, when considering motion of the vertical shaft vehicle. By means of the averaging method, for combination resonances in a case of eigenfrequences sum, the influence of the environment (guides) dynamics on the width of the resonant zones and the possibility of appearance of combination resonances, by all pairs of the system eigenfrequencies and all harmonics of stiffness expansion into a trigonometric polynomial, are determined.