Uncertainty analysis of quasi-zero stiffness metastructure for vibration isolation performance

Dongxian Wang, Jianlei Zhao, Qian Ma, Gang Zhou, Duzhou Zhang*, Rui Zhu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

Quasi-zero stiffness (QZS) metamaterials and metastructures have great advantages of being highly integrable and lightweight for vibration isolation in aerospace and aviation applications. However, the geometric uncertainty introduced from additive manufacturing (AM) significantly affects the metamaterial/metastructure’s vibration isolation performance and therefore, needs to be evaluated accurately and efficiently in the design process. In this study, a high-order sparse Chebyshev polynomial expansion (HOSPSCPE) method is first utilized to quantify the influence of AM-induced geometric uncertainty in the QZS microstructure. Excellent accuracy and much higher efficiency (about 470 times faster) of the proposed method are observed when compared to the widely used Monte Carlo method (MCM). Uncertainty analyses are then conducted for vibration isolation performance of the QZS metastructures and band gap properties of the QZS locally resonant metamaterials, respectively. The numerical results demonstrate that the geometric uncertainty analysis can provide useful guidance and recommendations for the manufacturing-influenced design of QZS metastructures and metamaterials.

Original languageEnglish
Article number957594
JournalFrontiers in Physics
Volume10
DOIs
Publication statusPublished - 23 Sept 2022

Keywords

  • Chebyshev polynomial expansion
  • locally resonant
  • quasi-zero stiffness
  • sparse point sampling
  • vibration isolation metastructure

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