Abstract: A new concept, namely, the equivalent mobility matrix of
coupling subsystem is proposed, and the corresponding
three-subsystem coupling progressive approach is explored. With
the new efficient approach presented, the complexity in dealing
with a more complicated dynamic coupling system is greatly
reduced. The new modeling method is then combined with the
theory of power flow to investigate the dynamics of the overall
non-rigid isolation system from the viewpoint of energy. The
interaction between the resilient machine of its main modes and
the resonant behavior of the flexible foundation on power flow
transmission is studied. Taking a machine tool mounted on a
multi-story working plant as an example, the dynamic
characteristics of the machine-foundation coupling system are
analyzed, and their effects on power flow transmission are
revealed under various service frequency bands. Some advisable
control strategies and the design principle for machinery
mounted on flexible structure are proposed.
Key words: Modeling
method Power flow Resilient machine Flexible foundation Subsystem Vibration control
*
This project
is supported by National Natural Science Foundation of China and
Provincal Natural Science Foundation of Shandong. Manuscript received on
March 18, 1998; revised manuscript August 5, 1998
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