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Chen A.-J.,Jiangnan University | Chen A.-J.,Key Laboratory of Food Packaging Techniques and Safety of China National Packaging Corporation
Mathematical Problems in Engineering | Year: 2013

The coupled nonlinear dynamical equations were developed for a tilted spring packaging system with critical components. The approximate solution and resonance conditions of system were obtained applying a variational iteration method. The resonance conditions, which should be avoided in the packaging design, can be easily obtained by VIM. © 2013 An-Jun Chen.


Li F.,Jiangnan University | Lu L.,Jiangnan University | Lu L.,Key Laboratory of Food Packaging Techniques and Safety of China National Packaging Corporation
Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering | Year: 2010

Modeling modified atmosphere packaging (MAP) with perforated film is one of key to design the MAP system of fruits and vegetables. Based on the relationship of the aperture and molecular mean free path, and combined with the respiration rate model of produce, a mathematical model based on Fick's law for predicting O 2 and CO 2 exchanges in MAP with micro perforated films was developed. The respiration rates of Lentinula edodes were estimated using the closed system method, and the respiration model for Lentinula edodes was established based on the Michaelis-Menten equation. Fresh Lentinula edodes were packed in plastic jars filled with air and modified atmosphere, which sealed by polyethylene films with different perforation number and perforation diameters. All samples were stored under 25°C and a relative humidity of 50% for more than 50 hours, measuring the gas composition within packs during the storage. Comparison between model prediction and experimental data for gas composition within packs was conducted. Results indicated the model predictions agree well with the experimental data.


Wang J.,Jiangnan University | Wang J.,Key Laboratory of Food Packaging Techniques and Safety of China National Packaging Corporation | Lu L.-X.,Jiangnan University | Lu L.-X.,Key Laboratory of Food Packaging Techniques and Safety of China National Packaging Corporation | Wang Z.-W.,University of Jinan
Zhendong yu Chongji/Journal of Vibration and Shock | Year: 2010

Damage of products induced by shock and vibration occurs frequently at the logistic process. The main reason may be due to the lack of in-depth investigation on packaging dynamics. In the paper, researches on damage evaluation and dynamical analysis of packaging system were reviewed. The limitations in the researches were also discussed. It provides a reference to research on packaging dynamics.


Wang J.,Jiangnan University | Wang J.,Key Laboratory of Food Packaging Techniques and Safety of China National Packaging Corporation | Lu L.,Jiangnan University | Lu L.,Key Laboratory of Food Packaging Techniques and Safety of China National Packaging Corporation | Wang Z.,University of Jinan
Advanced Science Letters | Year: 2011

In this paper, a new spectral-based formulation for predicting dynamic characteristics of the complex interaction is developed. By using a lumped-parameter representation, the proposed method is verified. The effects of the coupling stiffness, frequency parameter ratio and damping on the dynamic response of critical component are investigated. Reducing the coupling stiffness of product-vehicle interface may lead to lower response of critical component. There is a sensitive range around 1 of frequency parameter ratio, where the response of critical component is largely amplified. The results may lead to some insights into the dynamic characteristics of the product-transport-system. © 2011 American Scientific Publishers.


Wang J.,Jiangnan University | Wang J.,Key Laboratory of Food Packaging Techniques and Safety of China National Packaging Corporation | Lu L.-X.,Jiangnan University | Lu L.-X.,Key Laboratory of Food Packaging Techniques and Safety of China National Packaging Corporation | Wang Z.-W.,University of Jinan
Zhendong yu Chongji/Journal of Vibration and Shock | Year: 2010

The shock characteristics of a hyperbolic tangent nonlinear packaging system with critical component were investigated under the action of half-sine acceleration pulse. The dynamical model of the system was developed, and the numerical results of the dynamical equations were gained. Based on the results, the three-dimensional shock response sprctrum of the critical component was obtained. And the effect of the pulse duration, the frequency ratio, the dmaping ratio, the pulse peak acceleration and the defined system parameters on the maximum shock response acceleration of the critical component was discussed. It was shown that all the effects are noticeable.

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