热固性酚醛树脂再生活性细料物性参数标定及应用  

Physical Parameters Calibration and Application of Regenerating Active Powder for Thermosetting Polyurethane

作　　者：何平 王丛洋[1] 范益伟 阮浩达 HE Ping;WANG Cong-yang;FAN Yi-wei;RUAN Hao-da(School of Mechanical and Electrical Engineering,Anhui Jianzhu University,Hefei 230601,China;Key Laboratory of Construction Machinery Fault Diagnosis and Early Warning Technology,Hefei 230601,China;Hubei Key Laboratory of Mechanical Transmission and Manufacturing Engineering,Wuhan University of Science and Technology,Wuhan 430081,China)

机构地区：[1]安徽建筑大学机械与电气工程学院,安徽合肥230601 [2]安徽建筑大学建筑机械故障诊断与预警技术实验室,安徽合肥230601 [3]武汉科技大学机械传动与制造工程湖北省重点实验室,湖北武汉430081

出　　处：《塑料工业》2021年第2期155-160,共6页China Plastics Industry

基　　金：国家自然科学基金项目(51877001);安徽省教育厅高校优秀人才支持计划重点项目(gxyqZD2020034);安徽建筑大学博士启动基金项目(2018QD14);2019年度大学生创新创业训练计划项目(S201910878065)。

摘　　要：为准确评价再生热固性酚醛树脂再生活性细料的机械混合程度,提出了通过休止角合理推测其他参数的思路,并提出了一种粉体休止角测定方法。以休止角作为参照,基于Hertz-Mindlin接触模型与前馈神经网络的预测模型,采用离散元参数标定的方法,对细料离散元物性参数进行标定。采用K-means聚类分析法确定细料离散元参数范围,选择一组最优离散元参数应用于细料机械混合再生制备试验。结果表明,再生活性细料颗粒随机混合浓度的相对标准偏差(RSD)约为0.15,接近均匀混合状态,获得综合性能较优的再生复合保温板,验证了细料离散元参数标定方法的有效性与可行性。In order to accurately evaluate the mechanical mixing degree of recycled thermosetting polyurethane,the idea of reasonably inferring other parameters through angle of repose(AOR)was put forward,and a method of measuring repose angle of powder was proposed.Based on Hertz-Mindlin contact model and the prediction model of feed forward neural network,the discrete element method(DEM)was developed to calibrate the physical parameters of fine materials.K-means clustering analysis method was used to determine the parameter range of fine material DEM.A group of optimal DEM physical parameters was selected to apply the mechanical mixing regeneration simulation test of fine material.The results show that the relative standard deviation( RSD )of the random mixing concentration of recycled active fine particles is about 0.15,which is close to the uniform mixing state.The recycled composite insulation board with better comprehensive performance is obtained,and the validity and feasibility of the parameters calibration method with DEM are verified.

关 键 词：离散元法 机械混合 再生活性细料 参数标定 休止角 

分 类 号：TQ323.1[化学工程—合成树脂塑料工业]