摘要本次设计在参照同类塔式起重机基础上,对QTZ40型塔式起重机进行总体设计及吊臂的设计。在吊臂设计工程中,采用了有限元法对其进行分析计算,。按照整机主要性能参数,确定各机构类型及钢结构型式,主要确定了吊臂的结构参数,并按照吊臂端部加载、跨中加载及根部加载三种工况分析。通过对吊臂作适当的简化,,施加各工况载荷,进行求解,进而可得各工况下各节点受力情况及各单元所受轴向力、轴向应力大小及各工况下吊臂的变形挠度大小,并能演示吊臂加载过程的动画,清晰的展现了各工况下吊臂的受力性能。通过修改模型参数,对不同模型进行分析比较。由比较不同模型在相同工况下的受力状况及刚度状况,综合分析强度和刚度条件,可得出受力最为合理的一组模型参数,通过对此组参数下模型进行强度及刚度校核,进而获得吊臂的最终参数结果。关键词:,,putation,,,,,andthenexertedvariousoperatingmodesload,,variousunitsreceivetheaxialstresssize,,,andthegeneralizedanalysisintensityandtherigidityconditioniscarriedon,amostreasonablemodelparametercanbeobtained,thoughtheintensityandtherigidityexaminationregardingthismodel,:···································································································································································································································1第2章总体设计····························································································································
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