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Vibration isolation by exploring bio-inspired structural nonlinearity.

Zhijing Wu1, Xingjian Jing, Jing Bian

  • 1Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hong Kong, People's Republic of China. School of Astronautics, Harbin Institute of Technology, Harbin, People's Republic of China.

Bioinspiration & Biomimetics
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Summary
This summary is machine-generated.

This study introduces a bio-inspired limb-like structure (LLS) for passive vibration isolation. The LLS offers tunable nonlinear stiffness, enabling effective vibration control for various engineering applications.

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Area of Science:

  • Mechanical Engineering
  • Biomimetics
  • Vibration Control

Background:

  • Passive vibration isolation is crucial in many engineering fields.
  • Existing quasi-zero-stiffness isolators have limitations.
  • Bio-inspiration offers novel solutions for mechanical challenges.

Purpose of the Study:

  • To investigate a bio-inspired limb-like structure (LLS) for passive vibration isolation.
  • To explore the nonlinear stiffness properties of the LLS.
  • To demonstrate the adjustable nature of the LLS for practical applications.

Main Methods:

  • Mathematical modeling and analysis of the proposed LLS.
  • Systematic study of asymmetric articulations and spring configurations.
  • Experimental validation and comparison with existing isolators.

Main Results:

  • The LLS exhibits tunable nonlinear stiffness, including quasi-zero, zero, and negative stiffness.
  • Asymmetric rod length and spring stiffness ratios are key factors for tuning stiffness.
  • The LLS demonstrates adjustable loading capacity, enhancing its application flexibility.

Conclusions:

  • The bio-inspired LLS provides an innovative solution for passive vibration control.
  • Adjustable nonlinear stiffness and loading capacity make the LLS highly adaptable.
  • The study offers insights into parameter selection for practical LLS implementation.