考虑摩擦效应的包装件跌落冲击响应研究

目的研究考虑摩擦效应的单自由度包装件系统的跌落冲击动力学过程。方法考虑摩擦力为常数和三次非线性函数的2种干摩擦模型,分析2种干摩擦模型下摩擦力参数对于产品最大加速度以及位移响应的影响。结果库仑干摩擦力对于产品的响应影响可以忽略不计,当缓冲材料的刚度较小时,三次非线性干摩擦模型对产品的最大加速度以及位移响应能够产生一定的影响,摩擦常系数r越大,产品响应频率越快,响应周期越短,此时摩擦力不能忽略。结论通过对不同的摩擦模型进行分析,所产生的影响不同,为考虑摩擦效应的包装件跌落冲击响应研究提供一些理论依据。

Dropping Impact Response Research of Package Considering Frictional Effects

The aim of this work was to study the dropping impact dynamics of a package system with single degree of freedom considering the effect of friction. Considering two dry friction models, the constant friction model and the cubic nonlinear friction model, the effects of friction parameters in the two dry friction models on the maximum acceleration and displacement response were analyzed. The result showed that the effect of Coulomb dry friction on the response of the product could be ignored. When the stiffness of the cushioning material was low, the cubic nonlinear dry friction model had a certain effect on the maximum acceleration and displacement response of the product. The larger the fiction constant r, the higher the product response frequency and the shorter the response cycle. The friction effect could not be ignored under this condition. The effects generated by analysis with different friction models were different, this provides some theoretical reference for the study on package dropping impact response considering the friction effect.