The static characteristic of a vibration isolating system with a low dynamic stiffness characteristic

The most important characteristic of a vibration isolator are its natural frequency and load supporting capacity. The vibration isolation quality in low excited frequencies (input frequencies) is considerably improved by reducing the natural frequency of system. In this way, however, load supporting capacity of a linear vibration isolating system can not maintain without an increase overall dimensions of the elastic elements. In order to eliminate this dichotomy between load bearing capacity and natural frequency, this paper will study and investigate the static characteristic of the vibration isolating system with low dynamic stiffness characteristic, which is built from a conventional passive isolator connecting in parallel with a negative stiffness mechanism system. The research clearly presents a static analysis of the system. The correlation between configurative parameters and the stiffness of elastic elements is taken into account. Finally, the approximating restoring force of system is obtained.