托盘堆码包装单元随机振动响应的实验研究  

Experimental investigation on response of random vibration for pallet stacked packaging unit

作　　者：王志伟[1,2,3] 曹燕[1,2,3] WANG Zhi-wei;CAO Yan(Packaging Engineering Institute,Jinan University,Zhuhai 519070,China;Key Laboratory of Product Packaging and Logis-tics of Guangdong Higher Education Institutes,Jinan University,Zhuhai 519070,China;Zhuhai Key Laboratory of Product Packaging and Logistics,Jinan University,Zhuhai 519070,China)

机构地区：[1]暨南大学包装工程研究所,广东珠海519070 [2]暨南大学产品包装与物流广东普通高校重点实验室,广东珠海519070 [3]暨南大学珠海市产品包装与物流重点实验室,广东珠海519070

出　　处：《振动工程学报》2021年第6期1187-1197,共11页Journal of Vibration Engineering

基　　金：国家自然科学基金资助项目(50775100)。

摘　　要：散装货物的托盘堆码单元是常见的运输包装形式。实验研究散装货物托盘堆码单元在随机振动激励下的产品加速度响应规律,分析产品响应的机制,讨论激励谱型、振动等级、约束方式和产品位置的影响。结果表明:托盘堆码系统各层产品加速度响应主要由一阶频率控制,底层产品还受到高阶频率的影响。激励谱型尤其是第一共振点附近的功率谱值会对单元的产品响应产生重要影响;当振动较大时,底层产品与上层产品的加速度响应特征明显不同,底层产品与支撑托盘或上层产品之间会出现分离,产生较大的冲击信号,导致底层产品加速度响应的超高斯分布;捆扎带的拉压性能不对称(非线性)导致了上层产品加速度响应信号的不对称及其分布的左偏态超高斯特性;拉伸膜缠绕裹包强化了捆扎带对单元的约束,有效抑制了产品的响应。Pallet stacked unit of bulk cargo is a common form of transportation packaging.This paper investigates experimentally the product acceleration response of pallet stacked unit of bulk cargo under random vibration excitation,and the mechanism of product response is analyzed.The influence of excitation spectrum,vibration level,constraint and product position is also discussed.The experiment results show that the product acceleration response at each layer is mainly controlled by the first resonance frequency,and that at the bottom is controlled together by higher order frequencies.The excitation spectrum type,especially the power spectral density in the first resonance region,has an important influence on the product response of the unit.When the vibration is large,the acceleration response of the bottom product is significantly different from that of the upper product,and a separation between the bottom products and supporting pallet or upper products occurs,which leads to a larger shock signal,resulting in the super Gaussian distribution of the acceleration response of the bottom product.The asymmetry(nonlinear)of tension and compression of the strapping leads to the asymmetry of the acceleration response signal and its left-skewness super Gaussian distribution.The stretched film wrapped strengthens the restraint of the strapping on the unit,and effectively inhibits the response of the product.

关 键 词：包装工程 随机振动 运输包装 托盘堆码单元 加速度响应 

分 类 号：TB48[一般工业技术—包装工程] O324[理学—一般力学与力学基础]