qtz40塔式起重机总体及臂架设计-学士学位论文说明书(含图纸).doc

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··········································································1 1.1 概述·············································································1 1.2 发展趋势·······································································1 第2章 总体设计····································································2 2.1 概述············································································2 2.2 确定总体设计方案····························································2 2.3 总体设计原则································································29 2.4 平衡臂与平衡重的计算······················································30 2.5 起重特性曲线·································································32 2.6 塔机风力计算································································33 2.7 整机的抗倾覆稳定性计算···················································43 2.8 固定基础稳定性计算························································49 第3章 吊臂的设计计算························································50 3.1 分析单吊点与双吊点的优缺点··············································50 3.2 吊臂吊点位置选择···························································51 3.3 吊臂结构参数参数···························································52 3.4 有限元模型建立过程的几点简化···········································53 3.5 吊臂结构的有限元分析计算·················································54 3.6 计算结果分析·································································69 3.7吊臂强度校核·································································76 3.8 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