Non-energy storage shaking device

Andersen et al. introduced nonlinear damping in NES, which adds new dynamic behavior to the system and improves energy transfer. It shows the potential application of NES nonlinear damping in vibration suppression and energy collection.

Wang et al. proposed a strong nonlinear vibration damping device through integrating inertia in Fig. 21(h), the X-structure, and NES. They considered the dynamic performance of the strong nonlinear device. It provides an effective option for vibration attenuation in the vehicle engineering.

Studied a shape memory alloy NES with negative stiffness to dissipate vibration energy through the hysteresis phase transformation of shape alloys under cyclic loading. Empty Cell Chang et al. 2021 Proposed a quasi-zero stiffness vibration absorber with a simple oblique spring to absorb ultra-low frequency vibration. Empty Cell Gatti 2022

The results described that there is strong energy transfer performance for the nonlinear shock absorber with clearance. However, the fitness between the gap and different modes needs to be optimized constantly.

In Fig. 17(c), Wang et al. constructed an elastic structure with softening-hardening element to reduce vibration energy at low frequencies. The elastic structure is evaluated through theory and experimentation. The vibration below its linear low energy frequency can be mitigated by the softening-hardening NES.

For steady-state vibration suppression, the peak vibration suppression of the NES can reach 82.2% in simulation and 81.9% in experiment. He et al. established a nonlinear equation for a cantilever beam with acoustic black hole and NES.