Dropping simulation and the selection of cushion packaging method of infrared lens

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Journal of Vibration and Shock ›› 2014, Vol. 33 ›› Issue (24) : 133-137.

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Dropping simulation and the selection of cushion packaging method of infrared lens

ZHANG Yun-hua,1,2,LI Shan1, LIU Guan-yu1, CHEN Ji2,LI Hong-bing2

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Abstract

The dropping process of a infrared lens and its package are analysised based on Explicit dynamic analysis theory in the paper,the maximum stress of infrared lens,large lens and small lens are extracted in each moment and then the curve was generated in MATLAB,the stress of large lens was higher than small lens at the initial moment and at the end of the stage the result is opposite,so it set off thinking of the thickness design of barrel; The cushioning packaging of this infrared lens such as rigid polyurethane foam,partial cushion packaging is better than comprehensive cushion packaging in the protection of product. And compared with bare machine drops, it is obvious that the Z acceleration response of the lager and small lens center node when the partial cushion packaging drops is much lower than it. Finally, the partial cushion packaging was put into corrugated box for the drop test, and then through it. This simulation-based design approach provided an effective means for the structure design of the infrared product and selection of cushioning packaging method.

Key words

infrared lens / dropping simulation / partial cushion packaging / rigid polyurethane / the peak of acceleration / shock

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ZHANG Yun-hua;;LI Shan;LIU Guan-yu;CHEN Ji;LI Hong-bing. Dropping simulation and the selection of cushion packaging method of infrared lens[J]. Journal of Vibration and Shock, 2014, 33(24): 133-137