Singular closed orbits and chaotic behavior of a double-winged quasi-zero-stiffness system

  • Xinyi HUANG ,
  • S. LENCI ,
  • Qingjie CAO
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  • 1.School of Astronautics, Harbin Institute of Technology, Harbin 150001, China
    2.Department of Civil and Building Engineering and Architecture, Polytechnic University of Marche, Ancona 60131, Italy
Qingjie CAO, E-mail: qingjiecao@hotmail.com

Received date: 2025-10-20

  Revised date: 2026-01-12

  Online published: 2026-03-02

Supported by

Project supported by the National Natural Science Foundation of China (No. 11732006) and the China Scholarship Council

Copyright

©Shanghai University 2026

Abstract

The complex chaotic behavior of a quasi-zero-stiffness (QZS) double-winged system with symmetric impact boundaries is investigated with Melnikov functions and numerical simulations. The analysis reveals the coexistence of multiple attractors. As a key mass parameter varies, the mechanism underlying degenerate singular closed orbits is elucidated, based upon which five distinct types of singular closed orbits are discovered, exhibiting both smooth and discontinuous (SD) characteristics. The chaotic threshold of each singular orbit is obtained by Melnikov functions and verified by numerical simulations. The numerical results further demonstrate the coexistence of SD motions. For zero damping systems, the Kolmogorov-Arnold-Moser (KAM) structures are exhibited to present the complex quasi-periodic and resonant behavior coexisting with chaotic and periodic motions. These findings advance the understanding of chaotic dynamics in non-smooth multi-well impact systems.

Cite this article

Xinyi HUANG , S. LENCI , Qingjie CAO . Singular closed orbits and chaotic behavior of a double-winged quasi-zero-stiffness system[J]. Applied Mathematics and Mechanics, 2026 , 47(3) : 509 -534 . DOI: 10.1007/s10483-026-3362-8

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