轮式起重机的起重性能研究
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摘要
|具有超起装置的大吨位起重机增加了桅杆和拉板,起重机主臂为静不定结构。在传统解析法的基础上,建立起重机主臂的超静定模型,同时考虑主臂挠度对工作幅度的影响,建立平衡方程,并利用变形协调条件以及力与位移间的物理方程,建立变形补充方程。联立方程组求解得到桅杆及拉板的内力,进而得到主臂承受的载荷。采用隔离法对每节臂进行受力分析,兼顾不带超起的工况,修正主臂轴向欧拉临界力的计算方法,利用有限元分析方法对不带超起工况的计算精度进行验算,计算结果表明精度可以满足工程要求。基于De lphi 7.0开发轮式起重机计算软件平台,该工具能够根据给定的结构参数及材料强度,计算主臂在不同工况下的最大吊重。
A mast pole and tension bar are added to a super heavy crane with a main boom in variable-static conditions. On the basis of traditional analysis super-static model has been built for the main boom,while a balance equation is formulated for the boom's deflection as affecting the operational tilt, additional equations are added including a physical equation for the deflections coordinating conditions, as well as for the force versus the displacement. By simultaneous equations for solution we get inner forces of the mast and the tension bar and further get loads on the boom. Isolation is used to analyze stresses at each of the boom sections in consideration with working conditions without super craning,and by the way revising calculation of Eular crippling stress while checking computations on without super craning through finite element analysis with satisfactory results. As based on Delphi 7.0 software platform for cranes this study can put forth max load lift of the main boom under various working conditions according to data and materials strength given.
A mast pole and tension bar are added to a super heavy crane with a main boom in variable-static conditions. On the basis of traditional analysis super-static model has been built for the main boom,while a balance equation is formulated for the boom's deflection as affecting the operational tilt, additional equations are added including a physical equation for the deflections coordinating conditions, as well as for the force versus the displacement. By simultaneous equations for solution we get inner forces of the mast and the tension bar and further get loads on the boom. Isolation is used to analyze stresses at each of the boom sections in consideration with working conditions without super craning,and by the way revising calculation of Eular crippling stress while checking computations on without super craning through finite element analysis with satisfactory results. As based on Delphi 7.0 software platform for cranes this study can put forth max load lift of the main boom under various working conditions according to data and materials strength given.
引文
[1]张质文.起重机设计手册[M].北京:中国铁道出版社,1997.
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[6]程培耕.轮式起重机设计计算软件总体及其主臂伸缩机构模块开发[D].长春:吉林大学,2015.
[7]徐斌.Q Y25型汽车起重机设计[D].大连:大连理工大学,2003.
[8]Dong S E,Chen Q.Probe on the Stress of the Support Crack of Crane Beams[C].3rd International Conference on Civil Engineering and Transportation(ICCET 2013).
[9]Sheffer A,Hormann K,Levy B.Mesh Parameterization:Theory and Practice[J].Siggraph Asia Course N otes,2008.
[2]顾迪民.工程起重机[M].2版.北京:中国建筑工业出版社,1988.
[3]戴春来.参数化设计理论的研究[D].南京:南京航空航天大学,2002.
[4]李保菊.具有超起装置的起重机伸缩臂稳定性研究[D].大连:大连理工大学,2012.
[5]刘建新.特种起重机力学计算模型与可行性分析[D].长沙:国防科技大学航天与材料工程学院,2013.
[6]程培耕.轮式起重机设计计算软件总体及其主臂伸缩机构模块开发[D].长春:吉林大学,2015.
[7]徐斌.Q Y25型汽车起重机设计[D].大连:大连理工大学,2003.
[8]Dong S E,Chen Q.Probe on the Stress of the Support Crack of Crane Beams[C].3rd International Conference on Civil Engineering and Transportation(ICCET 2013).
[9]Sheffer A,Hormann K,Levy B.Mesh Parameterization:Theory and Practice[J].Siggraph Asia Course N otes,2008.