摘要
水泥基材料水化全过程微观数值模拟是研究水泥基材料性能最先进的方法之一。在构建水泥颗粒模型过程中,颗粒与所包含像素的关系会影响模拟的合理性和精确性,并影响颗粒投放的精准度。根据不同的规则建立了不同的颗粒与包含像素的参数关系,与现有国外的一种参数关系进行对比验证。进一步研究了颗粒移动后颗粒与像素的关系,掌握了颗粒移动后对应的像素变化规律,通过移动较小粒径的颗粒实现"振捣"的效果,达到密实填充,为高密度颗粒模型的投放奠定基础。同时分析了数值模拟的计算误差,实际应用时要根据水泥颗粒级配的实际情况选取合适的精度。
The micro-numerical simulation of hydration process of cement-based materials is one of themost advanced methods of the research on the cement-base materials＇ performance. During the calculationprocess, the relationship of the particles and the including pixels will affect the reasonability and accuracyof the numerical simulation as well as the accuracy of packing particles. The relationship between particlesand pixels, established based on the different mathematical regulations, was compared and validated by anavailable foreign relationship. Besides,the further research conducted to figure out the relationships of parti-cles and pixels with the particle motion. It is found that the＂vibration＂ can be realized and the particlescan be compacted when moving the small particles,which is of great significance for optimization of parti-cles＇ packing. Meanwhile, the numerical simulation error was analyzed to put forward that the appropriateaccuracy of cement particles should be selected when using actual application.
出处
《水利学报》
EI
CSCD
北大核心
2016年第7期865-872,共8页
Journal of Hydraulic Engineering
基金
国家自然科学基金项目(51274192
51309090)
深部岩土力学与地下工程国家重点实验室开放基金(SKLGDUEK1414)
关键词
水泥基材料
微观
数值分析
颗粒与像素
颗粒投放
cement-based material
micro
numerical analysis
particles and pixels
packing the particles
