基于机加工偏差的网架锥头力学性能研究  

RESEARCH ON MECHANICAL PROPERTIES OF GRID CONE HEAD BASED ON MACHINING DEVIATION

作　　者：王永[1] 苗生龙[2] 胡洪蝶 WANG Yong;MIAO Shenglong;HU Hongdie(Xuzhou College of Industrial Technology,Jiangsu Xuzhou 221140,China;Xuhai College,China University of Mining and Technology,Jiangsu Xuzhou 221008,China)

机构地区：[1]徐州工业职业技术学院,江苏徐州221140 [2]中国矿业大学徐海学院,江苏徐州221008

出　　处：《低温建筑技术》2024年第7期102-106,111,共6页Low Temperature Architecture Technology

基　　金：徐州工业职业技术学院产业研发项目(K.JCCYYF2019092302)。

摘　　要：为研究机加工偏差对锥头力学性能影响,文中采用数值模拟的方法,建立规格为180×120/35mm的锥头有限元模型,探讨了锥头底板厚度、高强螺栓与锥头底板接触面积、非轴心力、锥头壁厚不均匀等机加工偏差对锥头承载能力和破坏模式的影响,得出不同偏差对锥头承载力和破坏模式的影响规律。根据分析结果,确定了锥头底板厚度不允许出现负偏差、优化螺栓端头尺寸和底板尺寸的匹配、锥头焊接完成后的垂直度检查、锥头中心偏移不宜超过5mm等质量控制建议,为精准评估锥头承载能力提供支持。A finite element model of 180 mm×120/35 mm is established by numerical simulation to study the influ⁃ence of machining deviation on the mechanical properties of the cone head.The influence of thickness of the cone head baseplate,the contact area between the high-strength bolt and the cone base plate,the non-axial force,and the uneven wall thickness of the cone head on the bearing capacity and failure mode of the cone head are discussed.The influence of different deviations on the bearing capacity and failure mode of the cone head is obtained.According to the analysis results,it is suggested that the thickness of the cone head bottom plate is not allowed to have negative deviation.The matching of the size of the bolt end and the size of the base plate is optimized,and the verticality after the cone head welding is checked,in which the center offset of the cone head should not exceed 5 mm,providing support for the accurate assessment of the load carrying capacity of the cone.

关 键 词：锥头底板 锥头承载力 非轴心力 

分 类 号：TU502[建筑科学—建筑技术科学]