Most research into natural spider web structures have considered only the small deformation theory based on small amplitude analysis. In reality, spider web structures, which are slender by nature, are more prone to large-amplitude load effects. This paper firstly presents a numerical study into large amplitude free vibrations of spider web structures. Highly coupled geometry and material nonlinearities have been formulated to establish the finite element models of spider web structures. Validation of the model has been carried out using previous research studies into spider web vibrations. Excellent agreement has been obtained for linear and nonlinear perturbation results. The validated FEM has been further extended to investigate the large amplitude effect on natural frequencies and corresponding mode shapes of highly-slender spider webs. Interestingly, this is the world first to report the dynamic softening and hardening phenomenon in the slender spider web structures. The insight into nonlinear dynamics of slender thin membrane skeleton structures can be used not only for better understanding the nature, but also for improving functionalities of defence technology using ultra-thin plates and shells.
|Title of host publication||Proceedings of 29th Nordic Seminar on Computational Mechanics – NSCM29|
|Place of Publication||Gothenburg|
|Publisher||Nordic Association for Computational Mechanics|
|Number of pages||4|
|Publication status||Published - 29 Oct 2016|
|Event||The 29th Nordic Seminar on Computational Mechanics - Chalmers, Gothenburg, Sweden , Gothenburg, Sweden|
Duration: 26 Oct 2016 → 28 Oct 2016
|Name||Forskningsrapporter (Tillämpad mekanik)|
|Conference||The 29th Nordic Seminar on Computational Mechanics|
|Period||26/10/16 → 28/10/16|
Bibliographical noteKaewunruen, S., Yang, T. and Xu, S., (2016), Large amplitude free vibrations of spider web structures, Proceedings of The 29th Nordic Seminar on Computational Mechanics, Chalmers University of Technology, Gothenburg, Sweden, 28-30 October 2016.
[Research Award 2016 by Institution of Structural Engineers (IStructE) Midlands].
- Large amplitude
- free vibrations
- nonlinear dynamics
- spider web
- membrane structures