摘要
提出一种基于随机游走的混凝土圆形骨料投放的数值模拟方法,能够模拟重力作用下骨料在混凝土浇筑和振捣过程中的运动过程。该方法具有骨料投放效率高,填充率高,保证骨料一次性投放成功的优点。投放算例验证了该数值模拟方法的有效性,骨料填充率可达到70%,可以满足大体积、全级配、高强度混凝土的骨料投放模拟。该文还对骨料投放次数和游走次数的选择进行了讨论。
Based on random walk algorithm, a new numerical simulation method for round aggregate generation is proposed. The aggregate movement in concrete pouring and mixing is simulated. The simulation also takes gravity into account. This method can guarantee the aggregate generation successfully in one packing cycle, thus improve the efficiency of numerical simulation of concrete aggregate generation. Aggregate generation examples show the effectiveness and efficiency of the proposed numerical simulation method. They also demonstrate that this method can be used to simulate the mass, fully-graded concrete and high-strength concrete. Finally, the random walking times and packing times for the simulation were discussed.
出处
《工程力学》
EI
CSCD
北大核心
2010年第1期154-159,172,共7页
Engineering Mechanics
关键词
混凝土
骨料
随机游走
投放
数值模拟
concrete
aggregate
random walk
packing
numerical simulation
