Yildirim, AhmetSaadatnia, Z.Askari, H.2019-10-272019-10-2720110895-71771872-94790895-71771872-9479https://doi.org/10.1016/j.mcm.2011.03.012https://hdl.handle.net/11454/44311In this paper, Hamiltonian Approach (HA) is applied to obtain the analytical approximate solution of the nonlinear oscillators with Rational and Irrational Elastic Terms. Periodic solutions are analytically verified and consequently the relationship between the natural frequency and the initial amplitude is obtained in an analytical form. A comparison of the period of oscillation and obtained solutions with the exact results illustrates that the Hamiltonian approach is very effective and quite accurate for nonlinear equations. (C) 2011 Elsevier Ltd. All rights reserved.en10.1016/j.mcm.2011.03.012info:eu-repo/semantics/openAccessHamiltonian approachNonlinear oscillatorsRational and irrational elastic termsArticle5401.Feb697703WOS:000290014600064N/AQ1