The random vibration characteristics of packaged product in four levels of vibrations and three kinds of constraints are experimentally investigated. The finite element method is applied to analysis the response of product packaging in the fixed constraint, as well as the stresses and strains of box and pad. The results indicate that the response acceleration power spectrum density (PSD) of product depends mainly on the excitation one in the resonance area, and that the packaging plays a bandpass and amplification effect. The resonance frequency of packaged product increases with the strengthening of constraint, and the resonance peak of acceleration PSD in the fixed constraint is obviously bigger than that in the unrestraint and elastic constraint. The resonance frequencies and acceleration PSDs of product obtained from the finite element method are in agreement with the experimental ones. The peak of acceleration PSD of product is sensitive to the damping coefficient of system. The finite element method provides an effective tool for the analysis and design of product packaging in random vibration in logistics.
王志伟1,2,3,林深伟1,2,3. 随机振动下产品包装件动态响应的实验研究和有限元分析[J]. 振动与冲击, 2017, 36(13): 223-229.
WANG Zhiwei1,2,3，LIN Shenwei1,2,3. Experimental investigation and finite element analysis of dynamic response of packaged product in random vibration. JOURNAL OF VIBRATION AND SHOCK, 2017, 36(13): 223-229.
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