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Abstract and Applied Analysis
Volume 2013 (2013), Article ID 891914, 3 pages
http://dx.doi.org/10.1155/2013/891914
Research Article

Nonlinear Response of Strong Nonlinear System Arisen in Polymer Cushion

1Key Laboratory of Food Packaging Techniques and Safety of China National Packaging Corporation, Wuxi, Jiangsu 214122, China
2Department of Packaging Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China
3Packaging Engineering Research Institute, Jinan University, Zhuhai, Guandong 519070, China

Received 14 December 2012; Revised 30 December 2012; Accepted 30 December 2012

Academic Editor: Lan Xu

Copyright © 2013 Jun Wang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A dynamic model is proposed for a polymer foam-based nonlinear cushioning system. An accurate analytical solution for the nonlinear free vibration of the system is derived by applying He's variational iteration method, and conditions for resonance are obtained, which should be avoided in the cushioning design.