大直径浅圆仓“离心”模型的动态侧压力颗粒流试验  

PFC3D SIMULATION ON DYNAMIC LATERAL PRESSURE OF LARGE-DIAMETER SQUAT SILO CENTRIFUGAL MODEL

作　　者：张松松[1] 原方[1] 

机构地区：[1]河南工业大学土木建筑学院,河南郑州450052

出　　处：《河南工业大学学报（自然科学版）》2009年第5期92-96,共5页Journal of Henan University of Technology：Natural Science Edition

基　　金："十一五"国家科技支撑计划项目(2006BAD08B01);河南省高校新世纪优秀人才支持计划资助项目(2005HANCET-13)

摘　　要：利用离散单元法颗粒流程序(PFC3D)建立大直径浅圆仓的缩尺模型,该缩尺模型借鉴了离心机模型试验的原理,能够提供计算原型浅圆仓所需的重力场.首先模拟了该模型浅圆仓的静态侧压力,然后在其静态侧压力与原型浅圆仓的实测值基本吻合的基础上进行该模型浅圆仓卸料过程的模拟分析,得到卸料过程中大直径浅圆仓仓壁动态侧压力的变化趋势和超压系数的范围.The scale model of squat silo in large diameter was established with Particle Flow Code 3 Dimension （PFC^3D）. This scale model draws lessons from the experiment principle of centrifugal model, it can provide the field of gravity in the circulation of archetypal squat silo. Firstly, the static lateral pressure of this model was simulated. Then, the simulation analysis of the unloading process in this model squat silo was performed on basis of consistency between the lateral pressure and the measured value in archetypal squat silo. In conclusion, the variation trend and the scope of overpressure coefficient of the dynamic lateral compression in large - diameter squat silo＇ s wall could be obtained in the unloading process.

关 键 词：浅圆仓 “离心”模型 PFC 动态侧压力 

分 类 号：TS210[轻工技术与工程—粮食、油脂及植物蛋白工程] TU249.2[轻工技术与工程—食品科学与工程]