基于声发射的工程陶瓷边缘碎裂灰色尖点突变预报模型

Grey Cusp Catastrophe Prediction Model of Edge Chipping for Engineering Ceramics Based on Acoustic Emission

损伤预报是减轻或消除工程陶瓷边缘碎裂的有效手段。针对工程陶瓷边缘碎裂的突变不连续特性,结合灰色理论和尖点突变理论,建立了基于声发射的灰色尖点突变预报模型,并应用该模型对不同已知数据下的氧化铝陶瓷边缘碎裂损伤演化过程进行了损伤预报。结果表明:已知数据占总数据的百分比对模型的预测精度影响较大,当已知数据占总数据的80%以上时,灰色尖点突变预报模型可较好地实现氧化铝陶瓷边缘碎裂的损伤预报,从而可有效减轻或消除工程陶瓷边缘碎裂的产生。

Damage prediction is an effective means to reduce or eliminate edge chipping of engineering ce-ramics.Pointing at the mutation characteristics of edge chipping for engineering ceramics,a grey cusp catastrophe prediction model based on acoustic emission is established based on grey theory and cusp ca-tastrophe theory,which is applied to predict the damage evolution process of edge chipping for alumina ceramics according to the different known data.The results show that:percentage of the known data ac-count for the total data has a greater impact on prediction accuracy of the model,and the grey cusp catas-trophe prediction model can predict the damage of edge chipping for alumina ceramics preferably while the known data account for more than 80% of the total data,which can effectively reduce or eliminate the generation of edge chipping for engineering ceramics.