Application of HPEM to Investigate the Response and Stability of Nonlinear Problems in Vibration

n this work, a powerful analytical method, called Heʹs Parameter Expanding Methods (HPEM) is used to obtain the exact solution of nonlinear problems in nonlinear vibration. In this work, the governing equation is obtained by using Lagrange method, then the nonlinear governing equation is solved analytically by Heʹs Parameter Expanding Methods. It is shown that one term in series expansions is sufficient to obtain a highly accurate solution which is valid for the whole domain. Comparison of the obtained solutions with those obtained using numerical method shows that this method is effective and convenient for solving these problems