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Spectrum analysis on dissipative motion in finite systems

Yuan Chang-Qing Zhao Tong-Jun Wang Yong-Hong Zhan Yong

Spectrum analysis on dissipative motion in finite systems

Yuan Chang-Qing, Zhao Tong-Jun, Wang Yong-Hong, Zhan Yong
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  • Abstract views:  3209
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  • Received Date:  06 February 2005
  • Accepted Date:  06 July 2005
  • Published Online:  20 December 2005

Spectrum analysis on dissipative motion in finite systems

  • 1. 河北工业大学理学院,天津 300130

Abstract: Dynamical problems about energy dissipation in a finite multi-degree of freedom Hamiltonian system are studied. The energy dissipation in the relevant system is realized by numerical simulation. By employing power spectrum analysis on q(t) or p(t) of the motion in the relevant system, it is found that during the dissipative process, distribution of the power spectral density about the motion extends to both lower and higher frequencies. The more irrelevant degrees of freedom are, the broader the distribution extends. Higher frequencies decrease as time evolves but there are no remarkable changes for lower frequency components.

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