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Planar Two-Dimensional Vibration Isolator Based on Compliant Mechanisms.

Ruizhe Zhu1,2, Jinpeng Hu2, Long Huang2,3

  • 1International College of Engineering, Changsha University of Science and Technology, Changsha 410114, China.

Micromachines
|January 25, 2025
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Summary
This summary is machine-generated.

This study introduces a novel planar two-dimensional vibration isolator utilizing quasi-zero stiffness (QZS) compliant mechanisms. The developed isolator effectively reduces multi-directional, low-frequency vibrations in engineering applications.

Keywords:
compliant mechanismsdynamicsnegative stiffnesspositive stiffnessvibration isolator

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Area of Science:

  • Mechanical Engineering
  • Vibration Control
  • Materials Science

Background:

  • Vibration in engineering applications can cause significant damage.
  • Multi-directional vibration isolation is crucial for protecting equipment.
  • Existing solutions may not address complex, multi-directional vibration challenges effectively.

Purpose of the Study:

  • To propose and analyze a planar two-dimensional vibration isolator.
  • To achieve quasi-zero stiffness (QZS) for enhanced vibration isolation.
  • To investigate the performance of the proposed isolator under various conditions.

Main Methods:

  • Design of a compliant mechanism with negative and positive stiffness modules.
  • Establishment of a dynamic model using third-order Taylor expansion.
  • Application of the harmonic balance method for analysis.
  • Experimental validation of the vibration isolation performance.

Main Results:

  • The proposed mechanism exhibits quasi-zero stiffness (QZS) properties.
  • Parameter analysis revealed the influence of damping ratio, system stiffness, and excitation amplitude on displacement transmissibility.
  • Experimental results confirmed good low-frequency vibration isolation performance.

Conclusions:

  • The developed planar two-dimensional vibration isolator demonstrates effective multi-directional vibration reduction.
  • The quasi-zero stiffness (QZS) design is key to achieving superior low-frequency vibration isolation.
  • This technology holds promise for protecting sensitive engineering equipment from harmful vibrations.