Author(s)

Z. Luo, S.G. Hutton

Abstract

Dynamic behavior of a damped spring-mass system subjected to regenerative and modulated forces Z. Luo, S. G. Hutton Department of Mechanical Engineering University of British Columbia, Canada Abstract This paper presents an analysis of the dynamic characteristics of a single degree- of-freedom spring-mass-dashpot system subjected to regenerative and modulated forces. This model is relevant to the basic dynamics of machine tools and industrial saws that may suffer from instability problems. It is found that the coupling effect of the regenerative and modulated forces results in different magnification factors for the different frequency components of the exciting force. The highest vibration level appears within a narrow frequency band corresponding to the sum of the damped natural frequency and the modulating frequency. The effects of the regenerative force and damping on the unstable regions are examined. 1 Introduction Many machining processes suffer from prob

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