Abstract
The paper concerns an investigation into the use of both stiffness and damping nonlinearity in the vibration isolator to improve its effectiveness. The nonlinear damping and nonlinear stiffness are both achieved by horizontal damping and stiffness as the way of the geometrical nonlinearity. The harmonic balance method is used to analyze the force transmissibility of such vibration isolation system. It is found that as the horizontal damping increasing, the height of the force transmissibility peak is decreased and the high-frequency force transmissibility is almost the same. The results are also validated by some numerical method. Then the RMS of transmissibility under Gaussian white noise is calculated numerically, the results demonstrate that the beneficial effects of the damping nonlinearity can be achieved under random excitation.
Highlights
Introducing an isolation mount between a source and a receiver is the most commonly adopted solution to reduce the level of transmitted vibrations, due to its economy and simple [1]
In this work, a new vibration isolation system is proposed by exploiting the advantages of both nonlinear damping and stiffness
The harmonic balance method is a well-established technique for the analysis of such the vibration isolation systems under harmonic excitation
Summary
Introducing an isolation mount between a source and a receiver is the most commonly adopted solution to reduce the level of transmitted vibrations, due to its economy and simple [1]. The analytical expression for the force transmissibilies of a particular nonlinear vibration isolation system is derived using Harmonic balance method. Aims to analyze the force transmissibility of the nonlinear damping and stiffness isolation in more details.
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