A SELF-OSCILLATORY SYSTEM UNDER PARAMETRIC EXCITATION OF DRILLING CRANE

Abstract

In this work, the authors have  investigated  the nonlinear  oscillation  of the self -oscillation system  under  parametric  excitation  of  drilling  crane.  Its  motion  is  loaded  by  the  periodic longitudial force  and the self _ oscillatory  force. The  equation  of  motion  for  the  system  examined,  was  set  up  the  partial  solution  of  this problem has been found  by the average method. The relation of parameters is plotted  in Fig 2. From  the  gotten  results,  it  is  easy  seen  that,  the parameters  of  the  drilling  crane  such  as length  1, F _ erea of cross setion,  p _ specific  mass, EI _ bending resistant  moment,  P _ they are
not arbitrarily. The ralation of amplitude and frequancy  is examined.