梨果实跌落冲击特性与流变模型

The Dropping Impact Behavior and Rheological Model of Pear

基于梨果实非损伤条件下的跌落冲击动力学特征,采用非线性黏弹性本构模型表征其流变特性。依据跌落冲击未损伤时的试验结果,进行模型参数识别。结果表明理论模型与试验结果十分吻合。采用本模型结合试验结果能较准确方便地确定果实跌落冲击的流变特征参数。研究结果为果实黏弹性流变特性分析以及模型表征提供了一种新方法。

Based on the dropping impact dynamics characteristic under non-damage condition, a non-linear viscoelastic model was develop to describe of pear the rheological characteristic. The model was composed of one non-linear spring and one non-linear viscous damper. The model parameter identification was completed by making use of the non-damage dropping test results, and it indicated that the theoretical model is in good agreement with the test results. The simulation results show that the suggest model in this manuscript could determine the rheological characteristic parameters of fruit＇s dropping impact accurately and conveniently. This manuscript provided a Novel method to determine the viscoelastic rheological characteristic and model characterization of dropping impact characteristic of pears and other fruit.