本科毕业设计--qtz40塔式起重机总体及臂架设计说明书含图纸.doc

毕业设计计算书指导教师：设计题目：QTZ40塔式起重机总体设计及臂架设计设计人：毕业设计说明书题目：QTZ40塔式起重机总体及臂架设计目录第1章前言··········································································11.1概述·············································································11.2发展趋势·······································································1第2章总体设计····································································22.1概述············································································22.2确定总体设计方案····························································22.3总体设计原则································································292.4平衡臂与平衡重的计算······················································302.5起重特性曲线·································································322.6塔机风力计算································································332.7整机的抗倾覆稳定性计算···················································432.8固定基础稳定性计算························································49第3章吊臂的设计计算························································503.1分析单吊点与双吊点的优缺点··············································503.2吊臂吊点位置选择···························································513.3吊臂结构参数参数···························································523.4有限元模型建立过程的几点简化···········································533.5吊臂结构的有限元分析计算·················································543.6计算结果分析·································································693.7吊臂强度校核·································································763.8吊臂稳定性校核······························································76毕业设计小结······································································87致谢··················································································88参考文献············································································89设计项目计算与说明结果前言概述发展趋势总体设计概述确定总体设计方案塔机金属结构塔顶吊臂构造型式分节问题截面形式及截面尺度腹杆布置和杆件材料选用吊点的选择与构造平衡臂和平衡重平衡臂的结构型式平衡重拉杆上、下支座塔身塔身结构断面型式塔身结构腹杆系统标准节间的联接方式塔身结构