Invariant and energy analysis of an axially retracting beam

Xiaodong Yang*, Ming Liu, Wei Zhang, Roderick V.N. Melnik

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

The mechanism of a retracting cantilevered beam has been investigated by the invariant and energy-based analysis. The time-varying parameter partial differential equation governing the transverse vibrations of a beam with retracting motion is derived based on the momentum theorem. The assumed-mode method is used to truncate the governing partial differential equation into a set of ordinary differential equations (ODEs) with time-dependent coefficients. It is found that if the order of truncation is not less than the order of the initial conditions, the assumed-mode method can yield accurate results. The energy transfers among assumed modes are discussed during retraction. The total energy varying with time has been investigated by numerical and analytical methods, and the results have good agreement with each other. For the transverse vibrations of the axially retracting beam, the adiabatic invariant is derived by both the averaging method and the Bessel function method.

Original languageEnglish
Pages (from-to)952-961
Number of pages10
JournalChinese Journal of Aeronautics
Volume29
Issue number4
DOIs
Publication statusPublished - 1 Aug 2016
Externally publishedYes

Keywords

  • Adiabatic invariants
  • Asymptotic analysis
  • Retracting beam
  • Time-varying systems
  • Transient dynamics

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Yang, X., Liu, M., Zhang, W., & Melnik, R. V. N. (2016). Invariant and energy analysis of an axially retracting beam. Chinese Journal of Aeronautics, 29(4), 952-961. https://doi.org/10.1016/j.cja.2016.06.009