太原科技大学毕业设计（论文）任务书（由指导教师填写发给学生）学院（直属系）：机电学院时间： 2009 年月日说明：一式两份，一份装订入学生毕业设计（论文）内，一份交学院（直属系）。
目录摘要 (I)Abstract (II)第1章：计算参数.................................................................................................................... - 1 -1.1基本参数...................................................................................................................... - 1 -1.2：选用参数................................................................................................................... - 1 -第2章：总体设计.................................................................................................................... - 3 -2.1:主梁............................................................................................................................. - 3 -2.2:支腿............................................................................................................................. - 6 -2.3：下横梁....................................................................................................................... - 8 -2.4：上横梁....................................................................................................................... - 9 -2.5：结构总图................................................................................................................. - 10 -第3章：载荷计算.................................................................................................................. - 12 -3.1：自重......................................................................................................................... - 12 -3.2：动力系数................................................................................................................. - 14 -3.3：水平惯性力............................................................................................................. - 14 -3.4：偏斜侧向力............................................................................................................. - 17 -3.5:风载荷....................................................................................................................... - 18 -第4章：内力计算.................................................................................................................. - 21 -4.1：门架平面的计算内力............................................................................................. - 21 -第5章：承载能力校核.......................................................................................................... - 27 -5.1：强度验算................................................................................................................. - 28 -5.2:刚度计算................................................................................................................... - 30 -5.3:支腿整体稳定性....................................................................................................... - 32 -5.4:支腿整体稳定性....................................................................................................... - 33 -第6章：承载能力校核.......................................................................................................... - 35 -6.1：主梁的拼接............................................................................................................. - 35 -6.2：主梁与支腿的法兰连接......................................................................................... - 37 -第7章：整机抗倾覆稳定性校核.......................................................................................... - 40 -7.1：抗倾覆稳定性校核条件......................................................................................... - 40 -7.2：门机抗倾覆稳定性计算......................................................................................... - 41 -致谢........................................................................................................................................ - 44 -附录1：英文部分................................................................................................................... - 46 -附录2：中文部分........................................................................................ 错误！未定义书签。
摘要本次设计为20t/35m U型双梁门式起重机金属结构设计。
在设计过程中，主要考虑结构的强度、稳定性。
对于主梁受力主要有自重、起重量、风载、偏斜侧向力以及惯性力，并分别考虑跨中和悬臂端的强度计算。
在支腿的设计过程中，主要受力主要是主梁对其的作用力、风载、惯性力及制动力等，并验算其强度和稳定性。
另外下横梁、各部件间的连接、整机的抗倾覆稳定性、整机的动静刚度都要进行必要的计算。
关键词主梁,支腿,下横梁,跨中,悬臂,强度,刚度,稳定性,连接20t/35m U portal hoist crane metal structure designAbstractThis design is 20t/35m U type metal structural of double bridge portal type crane . During the design process, the main considerations is structural strength and stability. Force on the main beams are mainly the weight of its own, the wind load, the lateral deflection, as well as inertia force, and we should take the calculation of the strength of Cross and cantilever-end respectively . During The design process of the outrigger , the main intensity is the force of the main beams, wind load, inertial force and the braking force, meanwhile checking its strength and stability is very important . What’s more , the under the beams, the connections between the components, the whole anti-overturning stability of the dynamic and static stiffness of the machine must be carried out.Key word Middle of span，Cantilever，strength，Stiffness，stability第1章：计算参数1.1基本参数（1）结构形式：U型（2）起重量：（3）工作级别：A5（4）跨度;（5）悬臂有效长度：（6）起升高度：（7）起升速度：（8）运行速度：（9）小车轮距：（10）小车轨矩：（11）小车总重：（12）主吊钩滑轮自重：（13）工作风压：（14）非工作风压：1.2：选用参数（1）钢材弹性模量：（2）钢材剪切模量：（3）泊松比：（4）钢材比重：（5）钢材线膨胀系数：（6）重力加速度：（7）车轮与轨道之间粘着系数：（8）钢丝的平均弹性模量：（9）小车轮数：（10）支腿结构形式：一刚一挠支腿（11）下横梁结构形式：拆线式有台车（12）上横梁结构形式：梯形截面（13）大车集电总重：检修平台总重：走台栏杆总重：梯子平台：司机操纵室总重：第2章：总体设计2.1:主梁2.1.1主梁截面高度：，取。