初始几何缺陷对含粮食钢筒仓的屈曲影响  

Effect of initial geometric defects on buckling of grain storage steel silos

作　　者：白方威 蒋敏敏[1] 郭茹芳 王地 BAI Fangwei;JIANG Minmin;GUO Rufang;WANG Di(School of Civil Engineering,Henan University of Technology,Zhengzhou 450001,Henan,China)

机构地区：[1]河南工业大学土木工程学院,河南郑州450001

出　　处：《工程建设》2024年第5期26-30,共5页Engineering Construction

摘　　要：大型钢筒仓作为典型的薄壁结构,被广泛应用于工农业中储存大量颗粒状固体物料。为了明确钢筒仓在卸料作用下对其稳定性的影响,基于欧洲钢筒仓设计规范,利用有限元软件ABAQUS进行数值模拟,将完善钢筒仓一阶特征值屈曲模态作为初始几何缺陷,研究其在卸料作用下的变形特征、屈曲模态和径向位移。结果表明:钢筒仓在卸料过程中受复杂侧压力和摩擦力的作用会引起仓壁失稳破坏;初始几何缺陷的存在进一步降低了钢筒仓的抗屈曲能力。本文研究结果可为钢筒仓储料发展提供一定的工程实用价值。As a typical thin-walled structure,large steel silos are widely used in industry and agriculture to store a large number of granular solid materials.In order to clarify the influence of steel silos on their stability under the action of discharge,the finite element software ABAQUS is used to carry out numerical simulations based on the European steel silo design code,and the first-order eigenvalue buckling mode of the improved steel silo is taken as the initial geometric defect,and its deformation characteristics,buckling modes and radial displacement under the action of unloading are studied.The results show that the steel silo is affected by complex side pressure and friction during the unloading process,which will cause the instability and failure of the silo wall,and the existence of initial geometric defects further reduces the buckling resistance of the steel silo.The results can provide some practical engineering value for the development of steel silo storage materials.

关 键 词：钢筒仓 初始几何缺陷 屈曲模态 径向位移 

分 类 号：TU391[建筑科学—结构工程]