Two parametrically excited chain systems

摘要

Two examples of parametrically excited chain systems are considered. On the first chain system it is shown that only parametric resonances of the first kind and no combination resonances can occur. From this it follows that for such a system when being self-excited the self-excited vibration cannot be favourably influenced by parametric excitation. On another chain system the conditions for a favourable effect of parametric excitation are presented.