Modelling and Identification of a Wire-Cable Vibration Isolator Via a Cyclic Loading Test Part 1: Experiments and Model Development.

A cyclic loading test was carried out on a wire-cable vibration isolator to obtain experimentally its hysteretic behaviour in shear, roll and tension–compression respectively. In shear and roll modes, the isolator exhibits symmetric soft-hardening hysteresis loops under cyclic loading, namely the hysteresis loops display a softening stiffness in relatively small deformations and diverge to exhibiting a hardening stiffness at large deformation levels. In the tension–compression mode, the isolator exhibits asymmetric hysteresis loops, which constitute a segment of a hardening overlapping envelope in the loading curves. In recognizing the inapplicability of existing hysteretic models, two improved Bouc–Wen models are proposed within the framework of the mathematical Duhem hysteresis operator, to represent the symmetric soft-hardening hysteresis loops and the asymmetric hysteresis loops with a hardening overlapping envelope respectively. [ABSTRACT FROM AUTHOR]