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Abstract:
The
lifetime of vibrating machine can be improved and the load on the base
can be decreased while using the theory of anti-resonance. The dynamic
model of driving point anti-resonant vibrating machine is built, and the
theory of this machine is clarified. In order to improve the amplitude
stability of upper body and lower body, the influence of mass ratio and
anti-resonance frequency ratio on amplitude stability is studied while
other parameters are constant. The relation surfaces of parameters which
combine mass ratio and anti-resonance frequency ratio with dynamic
magnification factors of both upper body and lower body are obtained.
Therefore, the parameters zone that satisfies the technique
requirement and assures the amplitude stability can be determined, which
provides an important foundation for design of anti-resonant vibrating
machine. When the material quality is fluctuant, the stability of system
amplitude and the shift of anti-resonant frequency are analyzed，and the
result reveals the necessity of controlling the excited frequency. The
amplitude stability of anti-resonant vibrating machine’s upper body and
lower body has been improved effectively by using the control technology
based on the reasonable dynamic parameters.
Key words:
Anti-resonant Vibrating machine
CLC No: TD156
国家自然科学基金资助项目(50075015). Received 20050210, received in revised form 20051006
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