Stochastic rotational response of a parametric pendulum coupled with an SDOF system

Panagiotis Alevras, Daniil Yurchenko

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

In this paper, parametric excitation of a lumped mass pendulum is investigated when having its pivot point vertically excited. Such a system is described by a sinus type nonlinear Mathieu equation and attention is drawn to the rotational motion of the mass. A single-degree-of-freedom (SDOF) system is used as a base for the pendulum, floating on ocean waves and being externally excited by them thus falling into the subclass of autoparametric systems. Due to the random nature of waves, a narrow-band stochastic process is used to model the environmental excitation. The effect of dry friction is considered and the interaction between the pendulum's rotational response and the base is studied.

Original languageEnglish
Pages (from-to)124-131
Number of pages8
JournalProbabilistic Engineering Mechanics
Volume37
DOIs
Publication statusPublished - Jul 2014

Keywords

  • Autoparametric system
  • Dry friction
  • Mathieu equation
  • Parametric pendulum
  • Random excitation
  • Rotational motion

ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Condensed Matter Physics
  • Ocean Engineering
  • Mechanical Engineering
  • Civil and Structural Engineering
  • Aerospace Engineering
  • Nuclear Energy and Engineering

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