小麦堆修正莱特-邓肯模型参数的研究  

Research on Parameters of Modified Lade-Duncan Model for Wheat Pile

作　　者：陈雪 程绪铎 高梦瑶 Chen Xue;Cheng Xuduo;Gao Mengyao(College of Food Science and Engineering,Nanjing University of Finance and Economics/Collaborative Innovation Center for Modern Grain Circulation and Safety,Nanjing ,Jiangsu 210046)

机构地区：[1]南京财经大学食品科学与工程学院/江苏省现代粮食流通与安全协同创新中心,江苏南京210046

出　　处：《粮食科技与经济》2018年第1期101-106,113,共7页Food Science And Technology And Economy

基　　金：江苏省高校协同创新中心现代服务业项目(WTTFY01);国家自然科学基金(31371865);江苏高校优势学科建设工程资助项目(苏政办(2014)37号)

摘　　要：由三轴压缩试验确定小麦堆的修正莱特-邓肯模型参数。采用TSZ-6A应变控制式三轴仪对小麦堆进行轴向压缩试验和各向等压压缩试验,根据修正莱特-邓肯模型理论和试验数据计算小麦堆的该模型的14个参数。结果表明:含水率分别为10.2%、12.46%、14.05%w.b.的宁麦13号修正莱特-邓肯模型参数:弹性模量数K分别为421.0、360.7、342.8,弹性模量指数n分别为0.56、0.65、0.47;泊松比υ分别为0.24、0.23、0.21;塑性塌落模量C分别为0.005 6、0.005 8、0.006 9,塑性塌落指数p分别为0.75、0.81、0.86;塑性剪切屈服常数η1分别为43.1、29.7、45.5,塑性剪切屈服指数m分别为0.75、0.52、0.71,势参数S分别为0.44、0.44、0.47,R分别为0.18、0.61、1.66,t分别为0.95、0.23、0.07,硬化功参数θ分别为0.29、0.30、0.33,l分别为0.68、0.72、0.73,α分别为4.1、5.9、2.4,β分别为0.71、1.00、0.62。参数C、p、R、θ、l随含水率的增大而增大;K、υ、t随含水率的增大而减小,其他参数与含水率无显著性关系。The parameters of Modified Lade-Duncan Model were measured by using TSZ-6A type of controlled triaxial apparatus on three different moisture contents of wheat pile in axial compression test and the isotropic compression test. The test results showed that the elastic parameter K were 421.0,360.7,342.8,n were 0.56,0.65,0.47,false were 0.24,0.23,0.21 respectively.The plastic collapse parameter C were 0.005 6,0.005 8,0.006 9,p were 0.75,0.81,0.86 respectively.Plastic expansive parameter η1 were 43.1,29.7,45.5,m were 0.75,0.52,0.71 respectively.Potential parameter S were 0.44,0.44,0.47,R were 0.18,0.61,1.66,t were 0.95,0.23,0.07 respectively.Hardening work parameter θ were 0.29,0.30,0.33,l were 0.68,0.72,0.73,α were 4.1,5.9,2.4,β were 0.71,1.00,0.62 respectively.The C,p,R,θ and l increase with the moisture content,and K,ν and t decrease with the moisture content,and there was no significant relationship between moisture and other parameters.

关 键 词：小麦堆 修正莱特-邓肯模型 模型参数 

分 类 号：S512.1[农业科学—作物学]