Abstract
As an application of the SD oscillator, in this chapter, a nonlinear isolator based on a spring-mass system with a single degree of freedom is proposed, which can be designed as a nonlinear supporting system for ground vibration tests (GVT) for large scale machines like aircrafts and for vibration isolation due to a stable quasi-zero-stiffness (SQZS). The SQZS structure is constructed with a mass supported by a vertical spring component to support the weight of the mass and a pair of horizontal linear springs providing an equal vertical negative stiffness. This is typical of an irrational restoring force due to the geometrical configuration. The unperturbed dynamics is studied with the equilibrium bifurcations. A parameter optimization is used to obtain SQZS over the maximum interval of low frequency isolation.
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- 1.
This chapter relies on a common work with Dr. Zhifeng Hao, Centre for Nonlinear Dynamics Research, School of Astronautics, Harbin Institute of Technology, Harbin 150001 China.
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Cao, Q., Léger, A. (2017). An Isolator: Dynamics and Vibration Isolation. In: A Smooth and Discontinuous Oscillator. Springer Tracts in Mechanical Engineering. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-53094-8_14
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