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Article
Power Series Solution for Strongly Non-linear Conservative Oscillators
Author(s)
Mazen I. Qaisi
Full-Text PDF XML 555 Views
DOI:10.17265/2159-5275/2019.02.004
Affiliation(s)
Mechanical Engineering Departement, University of Jordan, Amman 11942, Jordan
ABSTRACT
This paper compares the accuracy of the power series approach with that
of the modified Lindstedt-Poincare method for strongly nonlinear vibration. The
free vibration of an undampedDuffing oscillator is considered because it has an
exact solution. In the power series approach, the time variable is transformed
into an “oscillating time” which reduces the
governing equation to a form well-conditioned by the power series method.The
results show that the power series approach provides extremely accurate
vibration frequencies, even at large values of the nonlinear parameter,
compared with errors of up tonine percent for the modified Lindstedt-Poincare
method.
KEYWORDS
Nonlinear , oscillation , power series , conservative.
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