直墙半圆拱U型钢支架截面应力分布规律研究  

Section Stress Distribution of U-type Support Formed by Straight Wall and Semicircular Arch

作　　者：安百富[1,2] 刘泽 AN Bai-fu;LIU Ze(Work Safety Key Lab on Prevention and Control of Gas and Roof Disasters for Southern Coal Mines,Hunan University of Science and Technology,Xiangtan 411201,China;State Key Laboratory of Coal Resources and Safe Mining,China University of Mining and Technology,Xuzhou 221116,China;School of Resource ＆ Environment and Safety Engineering,Hunan University of Science and Technology,Xiangtan 411201,China)

机构地区：[1]湖南科技大学南方煤矿瓦斯与顶板灾害预防控制安全生产重点实验室,湖南湘潭411201 [2]中国矿业大学煤炭资源与安全开采国家重点实验室,江苏徐州221116 [3]湖南科技大学资源环境与安全工程学院,湖南湘潭411201

出　　处：《煤炭技术》2018年第11期301-303,共3页Coal Technology

基　　金：煤炭资源与安全开采国家重点实验室开放基金(SKLCRSM17KF00);湖南科技大学科研基金(969E51773)

摘　　要：针对直墙半圆拱U型钢支架截面应力规律分布问题,通过直墙半圆拱U型钢支架所使用的金属材料进行拉伸实验,获取其材料属性参数,并基于实验参数,采用数值模拟分析了不同型号直墙半圆拱U型钢支架截面剪切应力、轴向正应力以及Mises应力,得出结论:支架的切应力分布复杂,轴向正应力及Mises关于中性轴线性分布且远大于剪切应力,最大正应力和最大Mises应力基本相同,出现的位置相同,因此可以采用最大正应力代替最大Mises应力来校核支架的强度。Regarding the problem of section stress distribution of U-snaped support formed by straight wall and semicircular arch, obtains the material property parameters through metal material tensile experiments of the U-shaped support. And based on the experimental parameters, the numerical simulation analysis of the different type of the U-shaped support was performed, which analyses shear stress, axial normal stress and Mises of the U-shaped support. The results show that shear stress distribution was complex, axial normal stress and Mises were linearly distributed across neutral axis and were greater than the shear stress, and the maximum normal stress and the maximum Mises stress were in the same location, so the maximum Mises stress can be used instead of the maximum normal stress to check the strength of the U-shaped support.

关 键 词：直墙半圆拱U型钢支架 拉伸实验 数值计算 截面应力分布 

分 类 号：TD353[矿业工程—矿井建设]