PERIODIC SOLUTIONS FOR CERTAIN NON-SMOOTH OSCILLATORS WITH HIGH NONLINEARITIES

Faydaoglu Ş., Ozis T.

APPLIED AND COMPUTATIONAL MATHEMATICS, cilt.20, sa.3, ss.366-380, 2021 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 20 Sayı: 3
  • Basım Tarihi: 2021
  • Dergi Adı: APPLIED AND COMPUTATIONAL MATHEMATICS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Aerospace Database, Communication Abstracts, Metadex, zbMATH, Civil Engineering Abstracts
  • Sayfa Sayıları: ss.366-380
  • Anahtar Kelimeler: The Lindstedt-Poincare Method, Parameter Expansions, Modified Homotopy Perturbation Method, Strongly Nonlinear Oscillators, Approximate Solutions, HOMOTOPY PERTURBATION METHOD, EQUATIONS
  • Dokuz Eylül Üniversitesi Adresli: Evet

Özet

In this paper, we introduce a new adjustment of the Lindstedt-Poincare method combining it homotopy in topology by introducing a linear term with an unknown (variable) frequency and amplitude to be determined further and the solutions are in form of series expansions and maybe converge asymptotically. This adjustment works very well for nonsmooth oscillators with high nonlinearities. Examples given confirm that only one or two iterations lead to high accuracy of the solutions.