钢筒仓散料静态压力的三维有限元模拟  

Three-dimensional finite element simulation of static granular material pressure for steel silos

作　　者：杨鸿[1] 杨代恒[1] 赵阳[1] 

机构地区：[1]浙江大学空间结构研究中心,浙江省空间结构重点实验室,浙江杭州310058

出　　处：《浙江大学学报（工学版）》2011年第8期1423-1429,共7页Journal of Zhejiang University：Engineering Science

基　　金：国家自然科学基金资助项目(50778159,50208017);教育部新世纪优秀人才支持计划资助项目(NCET-07-0759);浙江省重点科技创新团队资助项目(2010R50034)

摘　　要：为考察所储存散料对钢筒仓仓壁的静态压力,建立考虑散料与仓壁相互作用的钢筒仓静态散料压力三维有限元分析模型.散料假定为各向同性,塑性阶段采用Drucker-Prager塑性模型,散料与仓壁之间的接触效应采用刚柔接触模型和面面接触方法进行模拟.利用所建立的有限元模型对平底钢筒仓(浅仓和深仓)及锥底钢筒仓的散料压力进行数值模拟,并将数值结果与欧洲钢筒仓规范、我国粮食钢板筒仓设计规范进行对比分析.文中还对平底钢筒仓散料的泊松比、内摩擦角、膨胀角和摩擦系数进行参数分析,结果表明泊松比和内摩擦角的影响较大.In order to simulate the static pressures from stored granular materials,a three-dimensional finite element model accounting for the interaction between the granular material and the silo wall was established.The stored granular material was considered to follow a law of behavior of isotropic elastic material with the Drucker-Prager plasticity criterion in the plastic range,and the interaction between the stored material and the silo wall was simulated by the rigid-flexible contact model and the face-to-face contact method.Granular material pressures for both flat-bottomed steel silos（shallow silos and deep silos） and conical-bottomed steel silos were simulated employing the proposed FE model,and the results were compared with those of the Eurocode for steel silos and the Chinese design code for grain steel silos.A parametric analysis on flat-bottomed steel silos was also carried out to study the effects of granular material＇s Poisson＇s ratio,internal friction angle,dilatancy angle and friction coefficient,and it is found that the effects of the Poisson＇s ratio and internal friction angle are obvious.

关 键 词：钢筒仓 静态散料压力 三维有限元模拟 接触分析 

分 类 号：TU33[建筑科学—结构工程]