摘要
为从细观尺度对河冰开裂过程进行数值模拟分析,需要构建准确可靠的河冰细观计算模型。河冰细观模型构建需要确定细观冰结构参数,即冰晶粒尺寸、分布及冰晶边界、晶粒间初始缺陷;还需要细观冰材料参数,即晶粒各向异性、晶粒弹性模量、冰晶断裂强度、冰晶边界的力学性能。分析总结了河冰细观模型参数的选取方法,提出了参数的取值范围、量化方法及关系式,并通过黄河冰实例,对数值模拟结果与试验结果进行了对比,两者比较吻合。这些研究结果可直接用于河冰细观模型的构建。
It needs to build accurate and reliable microscopic model of river ice in order to conduct numerical simulation and analyze the cracking process of river ice in micro-scale. This paper mainly involved microscopic structure parameters and microscopic material parameters in the microscopic model building of river ice. The microscopic structure parameters contained grain size, distribution,ice boundary treatment and initial defects. The microscopic material parameters contained grain anisotropy,ice crystal elastic modulus,fracture strength and me-chanical properties of ice crystal boundar . It summarized and analyzed the method of model parameters selection and put forward the specific scope,quantitative methods and relationship of related parameters. The results of numerical simulation and experimental results were com-pared according to the Yellow River ice and the two methods were basically agreed. The research results could be applied directly to the building of microscopic model of river ice.
出处
《人民黄河》
CAS
北大核心
2017年第10期27-31,共5页
Yellow River
基金
中央级公益性科研院所基本科研业务费专项资金资助项目(HKY-JBYW-2014-09)
水利部堤防安全与病害防治工程技术研究中心开放课题基金资助项目(2016002)
国家自然科学基金资助项目(51579028
51309203)
关键词
河冰
晶体
参数
模型
强度
river ice
crystal
parameter
model
strength
