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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 | Wang Z.-W.,University of Jinan | Lu L.-X.,Jiangnan University | And 3 more authors.
Shock and Vibration | Year: 2011

To evaluate the shock characteristics of critical component for a nonlinear packaging system, a new concept of three-dimensional shock spectrum was proposed. Three key coordinate parameters, such as the nondimensional pulse duration, the frequency parameter ratio and the ratio of the maximum response acceleration to the peak pulse acceleration, were governed in a novel dynamical mathematical model. It is shown that the shock response of critical component is weakened owning to the decrease in the defined system parameter. Furthermore, at low frequency parameter ratio, the enhancement of the damping ratio of the critical component leads to the decrease in the peak of the shock response, which can also be reduced by the increase in damping ratio of cushioning pad at both lower and higher frequency parameter ratios. The discussion and analysis provide some insights into the design of cushioning packaging as well. © 2011 - IOS Press and the authors. All rights reserved.


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: 2011

The shock characteristics of a cubic nonlinear stacked packaging system with critical components 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 obtained. Then, to evaluate the damage potential of the shock to the critical components of the system, a concept of combined shock response spectrum was proposed. Based on the results, the effect of peak pulse acceleration, mass ratio, frequency ratio, damping ratio of critical component and cushioning pad as well as number of layers on the combined shock response spectrum of the system was discussed.


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.


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.


Hong X.,Jiangnan University | 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
Mathematical Problems in Engineering | Year: 2013

The homotopy perturbation method (HPM) with an auxiliary term was applied to obtain approximate analytical solutions of polymer cushioning packaging system. The second-order solution of the equation of motion was obtained and compared with the numerical simulation solution solved by the Runge-Kutta algorithm. The results showed the high accuracy of this modified HPM with convenient calculation. © 2013 Xiang Hong et al.


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.


Lu L.,Jiangnan University | Lu L.,Key Laboratory of Food Packaging Techniques and Safety of China National Packaging Corporation | Zheng W.,Jiangnan University | Lv Z.,Jiangnan University | And 2 more authors.
Packaging Technology and Science | Year: 2013

Time-temperature indicators (TTIs) are devices with a time-temperature- dependent change to reflect food quality status and temperature history. There is increasing interest in the application of TTIs to monitor food cold chain logistics for food safety and quality. In this paper, a new enzymatic TTI based on enzyme reaction, diffusion and enzyme demobilization technology is developed. The mathematical model of TTI is drawn up, which shows the relationships between the changes of time and temperature and the diffusion length of the indicator's colour changed. To assess the reliability of TTI as the quality indicating device for perishable foods in the process of storage and transportation, fresh milk is studied as an example. Through the research of dynamic characteristics of milk and TTIs, five different TTIs that matched with the activation energy of the prototype milk were designed and tested in several constant temperature profiles and a variable temperature profile. By comparing the end response value of the prototype TTI with the effect of forecasting the shelf life of milk, it was considered that the enzyme reaction-diffusion TTI has good stability and reliability at dynamic storage conditions and could be used to monitor the shelf life of perishable food during the cold chain transportation. Copyright © 2012 John Wiley & Sons, Ltd.


Fan Z.-G.,Jiangnan University | Fan Z.-G.,Zhejiang University of Science and Technology | Lu L.-X.,Jiangnan University | Lu L.-X.,Key Laboratory of Food Packaging Techniques and Safety of China National Packaging Corporation | And 2 more authors.
Zhendong yu Chongji/Journal of Vibration and Shock | Year: 2016

The variation of inner-resonance condition parameters of a honeycomb paperboard system was studied under fatigue compression. Firstly, the pre-compressed honeycomb paperboards were tested with different numbers of fatigue compression. Then, they were tested with quasi-static compression. The obtained stress-strain curves were fitted with polynomials to gain parameters of honeycomb paperboard's constitutive model. The inner-resonance conditions of a single-DOF honeycomb paperboard system and a 2-DOF one were acquired with the variational iteration method. Finally, the varying laws of the two systems' inner-resonance condition parameters were obtained through calculations of parameters of honeycomb paperboard's constitutive model. The results were significant to avoid inner-resonances during honeycomb paperboard cushion packaging design. © 2016, Editorial Office of Journal of Vibration and Shock. All right reserved.

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