The negative stiffness offered by bi-stable mechanisms can improve the dynamic performance of a structure. In this work the effect of adding negative stiffness and ShapeMemoryAlloy (SMA) based damping in isolated structures is explored through the study of the stationary response of system for different values of negative stiffness and SMA hysteretic damping ratio. The frequency response curves of the isolated structure, with and without the negative stiffness contribution, are numerically obtained for different levels of excitation amplitude in order to evaluate the acceleration and displacement transmissibility curves. The benefits of negative stiffness, damping amplification and reduced transmissibility of accelerations and displacements, as well as the existence of dynamic instability, are illustrated


Nonlinear Dynamic Response of an Isolation System With Negative\x0bStiffness and Shape Memory-Based Damping

Division / Sponsors: 
Design Engineering Division and Computers & Information In Engineering Division


Paper Proceedings: https://asmedigitalcollection.asme.org/IDETC-CIE/IDETC-CIE2020/volume/83907

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