摘要
基于跌落冲击试验和振动试验,研究了4种不同厚度的蜂窝纸板的缓冲防振性能,获得了动态缓冲曲线的经验公式及其特征系数,振动传递率曲线的峰值频率、传递率及阻尼比,为蜂窝纸板在缓冲防振包装中的推广应用提供了基本数据.试验结果表明:蜂窝纸板的动态缓冲曲线呈凹谷状,开口向上,只有一个极小值点,冲击加速度波形近似于半正弦波,冲击作用时间较长,吸收的冲击能量较大,具有优良的动态缓冲特性;振动传递特性具有多模态性,有主次之分,对高频振动有显著的衰减性.
In order to provide basic data for utilizing honeycomb paperboards in cushioning and vibration-proof packaging, dynamic cushioning property and vibration transmissibility of honeycomb paperboards with different thickness are experimentally investigated on the drop shock machine and vibration table. The shapes of dynamic cushioning curves of honeycomb paperboards with different thickness are always concave and upward, and each dynamic cushioning curve has only one minimum value point. By using the fitting polynomial of the curves, the empiric formulas and characteristic factors of dynamic cushioning curves of honeycomb paperboards with different thickness have been obtained. The waves of shock acceleration are similar to half-sine shock pulses, and the shock durations of honeycomb paperboards are much longer than those of foam plastics, so the honeycomb paperboards are capable to absorb more shock energy than foam plastics and possess excellent dynamic cushioning property. From the vibration tests with slow sine sweep, the peak frequencies and transmissibility curves are measured and used to estimate the damping ratios. The vibration transmissibility curves of honeycomb paperboards have multiple peak frequencies, which may exert different transmissibilities on package article during distribution. When the excitation frequency is more than 350 Hz, the vibration transmissibility of honeycomb paperboards is very low and the damping ratio is high, so honeycomb paperboards may efficiently attenuate the vibration during distribution.
出处
《西安交通大学学报》
EI
CAS
CSCD
北大核心
2003年第5期539-541,共3页
Journal of Xi'an Jiaotong University
基金
陕西省教育厅科研计划资助项目(00JK221).
关键词
蜂窝纸板
动态缓冲特性
振动传递特性
Damping
Honeycomb structures
Packaging
Vibrations (mechanical)
