Design, Optimization, and Realization of a Magnetic Multi-Layer Quasi-Zero-Stiffness Isolation Platform Supporting...

Area of Science:

• Mechanical Engineering
• Materials Science
• Physics

Background:

• Vibration isolation is crucial for sensitive equipment operating in dynamic environments.
• Traditional isolation systems struggle with variable loads and large-amplitude, low-frequency vibrations.
• Achieving both effective isolation and rapid settling time often presents conflicting design challenges.

Purpose of the Study:

• To develop a Multi-layer Quasi-Zero-Stiffness (ML-QZS) vibration isolation platform.
• To enable effective isolation for variable loads across a wide range of amplitudes and low frequencies.
• To optimize dynamic performance, balancing transient response and steady-state isolation.

Main Methods:

• Design of an ML-QZS platform utilizing multi-layer permanent magnets to create discontinuous negative-stiffness regions.
• Application of a bi-objective Pareto optimization criterion to balance transient vibration and displacement transmissibility.
• Experimental validation of the platform's design principles and optimization strategies.

Main Results:

• Demonstration of a wide Quasi-Zero-Stiffness (QZS) range suitable for diverse load conditions.
• Successful coordination of vibration transient times and significant isolation effectiveness through optimization.
• Experimental verification of the multi-layer magnetic ring construction and parameter optimization.

Conclusions:

• The developed ML-QZS platform offers advanced nonlinear isolation for variable loads in challenging dynamic environments.
• The proposed optimization method effectively balances competing dynamic performance metrics.
• Provides significant theoretical and experimental guidance for practical engineering applications in vibration isolation.