Non-linear Isolator for Vibration and Force Transmission Control of Unbalanced Rotating Machines

Abstract Purpose The objective of this paper is to investigate with simulations how non-linear spring and damper components isolators can be employed effectively reduce both the oscillations force transmitted ground in whole spinning range unbalanced rotating machines. Methods principal goal twofold. First, present a concise consistent formulation based on harmonic balance approach for vibration response machines mounted linear/non-linear, softening/hardening, un-tensioned/pre-tensioned springs linear/non-linear dampers. Second, provide comprehensive overview transmission control specifically tailored Results study has shown that, best isolation provided by pre-tensioned linear cubic softening combined negative quadratic damper. should designed such way as it holds weight machine thus produces vibrating symmetric elastic restoring proportional powers displacement. stiffness then tuned minimise frequency, amplitude, resonant fundamental mode suspension system, while preserving stability desired static deflection. In parallel, above resonance damping effect maximize energy absorption at higher frequencies. Conclusion that machine. particular, used mitigate low frequencies, close natural frequencies elastically suspended Also, tailor dissipation isolator have high which enhances and, rather importantly, mitigates