Abstract
This paper presents a novel nonlinear anti-vibration ring with deformable crescent-shaped cross-sections (NAVR-DCCS) inspired by the petiole of palm leaf. The proposed NAVR-DCCS exhibits markedly enhanced nonlinear quasi-zero stiffness through deformable cross-sections, which endow it with advantageous vibration isolation attributes. A comprehensive investigation of the structural nonlinearities and dynamic behaviors of the NAVR-DCCS is undertaken, with emphasis on the principle of cross-sectional deformation and its nonlinear stiffness properties. This study explores the influence of pertinent parameters on the nonlinear characteristics and displacement transmissibility. Tensile-compression testing and transmissibility measurements are conducted to verify theoretical calculations, and the experimental results are found to be in congruity with theoretical predictions. The beneficial nonlinear characteristics of the NAVR-DCCS hold promise for providing a passive vibration isolation methodology, representing a potentially innovative solution with broad-reaching applicability and utility across diverse research domains.
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Data availability
The data that support the findings of this study are available from the corresponding author upon reasonable request.
Abbreviations
- \(A\) :
-
Amplitude of maximum acceleration (m/s2)
- \(b\) :
-
Zeroth harmonic term (mm)
- \(c\) :
-
Damping coefficient (Ns/m)
- deg:
-
Degrees (−)
- \(E\) :
-
Young’s modulus (MPa)
- Eq:
-
Equivalent (−)
- \(f_{k}\) :
-
Geometrically nonlinear elastic force (N)
- Fig.:
-
Figure (−)
- FDM:
-
Fused deposition modeling (−)
- \(g\) :
-
Acceleration of gravity (m/s2)
- \(H\) :
-
Thickness of the crescent-shaped cross section (mm)
- Hz:
-
Hertz (−)
- HB:
-
Harmonic balance (−)
- HBM:
-
Harmonic balance method (−)
- HSLDS:
-
High-static-low-dynamic-stiffness (−)
- \(H(\omega )\) :
-
The transmissibility from the base to the platform (−)
- \(k_{1}\) :
-
Stiffness coefficient of ring (N/m)
- \(k_{2}\) :
-
Stiffness coefficient of ring (N/m3)
- \(l\) :
-
The distance between the centers of the inner and outer arcs of a crescent-shaped cross section (mm)
- \(L\) :
-
Lagrangian (−)
- \(m\) :
-
Payload mass (kg)
- mm:
-
Millimeter (−)
- \(N\) :
-
Newton (−)
- NAVR-DCCS:
-
Nonlinear anti-vibration ring with a deformable crescent-shaped cross-section (−)
- \(O\) :
-
Center of the circle (−)
- \(O_{1}\) :
-
The center of the outer arc of the crescent-shaped cross section (−)
- \(O_{2}\) :
-
The center of the inner arc of the crescent-shaped cross section (−)
- \(P_{zz} (\omega )\) :
-
The power spectral density of the excitation signal (g2/Hz)
- \(P_{zy} (\omega )\) :
-
The cross-spectral density of the excitation-response signal (g2/Hz)
- QZS:
-
Quasi-zero stiffness (−)
- \(r_{1}\) :
-
The radius of the outer arc of the crescent-shaped cross section (mm)
- \(r_{2}\) :
-
The radius of the inner arc of the crescent-shaped cross section (mm)
- \(R\) :
-
Radius of the ring (mm)
- \(s\) :
-
Second (−)
- SODF:
-
Single-degree-of-freedom (−)
- \(t\) :
-
Time (s)
- \(T\) :
-
Kinetic energy (J)
- \(T_{d}\) :
-
Displacement transmissibility (−)
- TPU:
-
Thermoplastic polyurethane (−)
- \(V\) :
-
Potential energy (J)
- \(W\) :
-
Width of the crescent-shaped cross section (mm)
- \(x\) :
-
Displacement of payload mass relative to base (mm)
- \(x_{0}\) :
-
Amplitude (mm)
- \(y\) :
-
Absolute displacements of the payload mass (mm)
- \(\ddot{y}\) :
-
Excitation acceleration amplitude applied at the payload mass (m/s2)
- \(z\) :
-
Absolute displacements of the base (mm)
- \(z_{0}\) :
-
Amplitude (mm)
- \(\theta\) :
-
The half of the circular angle of the sectoral section (deg)
- \(\omega\) :
-
Shaker driving frequency (rad/s)
- \(\phi\) :
-
Phase response (rad)
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This work was supported in part by National Natural Science Foundation of China (52105099), and the Funding by Science and Technology Projects in Guangzhou (202201010668).
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Appendices
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Appendix B
Appendix C
Appendix D
See Fig. 26.
Appendix E
See Table 12.
Appendix F
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Feng, X., Feng, J., An, E. et al. Palm petiole inspired nonlinear anti-vibration ring with deformable crescent-shaped cross-section. Nonlinear Dyn 112, 6919–6945 (2024). https://doi.org/10.1007/s11071-024-09440-y
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DOI: https://doi.org/10.1007/s11071-024-09440-y