基于弹塑性断裂力学的粮食筒仓钢锥斗极限载荷研究  

Investigation on limited loading for steel cones of grain silos based on elastic-plastic fracture mechanics

作　　者：贾鹏宇 昌雪玲 蒋文新[1] 詹水芬[1] JIA Peng-yu;CHANG Xue-ling;JIANG Wen-xin;ZHAN Shui-fen(Tianjin Research Institute for Water Transport Engineering,M.O.T.,Tianjin 300456,China;Zhejiang Scientific Research Institute of Transport,Hangzhou 311305,China)

机构地区：[1]交通运输部天津水运工程科学研究所,天津300456 [2]浙江省交通运输科学研究院,杭州311305

出　　处：《水道港口》2022年第4期507-511,共5页Journal of Waterway and Harbor

基　　金：浙江省交通运输厅科技计划项目(2021020);中央级公益性科研院所科研创新基金资助项目(TKS190111,TKS20200320);浙江省港航管理中心科技计划项目(2020K004)。

摘　　要：为保障粮食筒仓钢锥斗的安全运行,基于弹塑性断裂力学(EPFM),对含径向焊缝裂纹粮食筒仓钢锥斗进行了“合于适用”评估。综合考虑了裂纹长度、粮食种类(玉米、黄豆)、粮食装载高度对钢锥斗中径向裂纹扩展驱动力(J积分)的影响。通过比较裂纹扩展驱动力与断裂韧度值,确定了含不同长度径向焊缝裂纹钢锥斗所能承载物料的极限深度,对于保障粮食筒仓的安全运行具有重要意义。To ensure safe running of grain silos,fitness for purpose assessment was conducted for the radial weld crack in steel cone based on elastic-plastic fracture mechanics.The effect of length of crack,types of grain(corn,soybean),and height of grain loading on the crack driving force(J-integral)were considered.It is significant to ensure safe running of grain silos to determine the limited loading of steel cones with different length radial weld crack by comparing the crack driving force and fracture toughness.

关 键 词：粮食筒仓 钢锥斗 径向裂纹 极限载荷 

分 类 号：U653[交通运输工程—港口、海岸及近海工程]