摘要 :
Harmonic forced vibration of a spring-mass-damper system with a parametrically excited pendulum hinged to the mass is investigated. Four parameters in the equation of motion of the system are considered. Numerical calculation is u...
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Harmonic forced vibration of a spring-mass-damper system with a parametrically excited pendulum hinged to the mass is investigated. Four parameters in the equation of motion of the system are considered. Numerical calculation is used to evaluate the system response. The vibration -absorbing property of the system for the change of the parameters is clarified. Based on the analysis of the vibration-absorbing property, optimum parameters of the system are obtained.
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摘要 :
This paper deals with modeling and analysis of an impact system, which is composed of ball and plane. An impact model considering both duration of impact and energy loss is proposed. The Resultant force due to impact is formulated...
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This paper deals with modeling and analysis of an impact system, which is composed of ball and plane. An impact model considering both duration of impact and energy loss is proposed. The Resultant force due to impact is formulated by introducing a complex stiffness coefficient in Hertz's contact theory. From the expression for the resultant force, the impact system is modeled by both a nonlinear spring and a nonlinear dashpot. The characteristics of the nonlinear spring is expressed by using Hertz's theory, and that of the nonlinear dashpot is expressed by a function of the displace- ment and the velocity. The model parameters are determined by the configuration, the material value and the coefficient of restitution in the impact system. Experimellt and simulation are carried out to demonstrate the accuracy of the proposed model, and good agreement is shown.
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