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稳定性是衡量各类起重机设计是否能够满足安全生产的一个重要指标。针对目前超高型龙门起重机刚性支腿长细比较大,柔性增加,高耸化日趋明显,梁杆大变形这一非线性因素在现代超大型龙门起重机的整体稳定性计算中没有计入在内的实际情况下,通过考虑几何非线性,按照大变形梁单元的特点并结合弧长法,建立相应的非线性有限元数值模型,编制了相应的通用求解程序,最后按照该型龙门起重机的结构特点及实际产品参数,进行了线性及几何非线性大变形的数值模拟,并对结果进行了比较分析,可为龙门起重机的设计及安全评估提供新的分析依据。
Stability is a measure of the various types of cranes designed to meet the safety of production is an important indicator. In view of the slenderness and rigidity of the rigid legs of the super-gantry cranes, the flexibility is increasing and the talling is becoming obvious. The nonlinear factor of large deformation of the girder is not included in the calculation of the overall stability of the modern super-large gantry crane In practice, the corresponding nonlinear finite element numerical model is established according to the characteristics of large deformation beam elements and arc length method by considering the geometric nonlinearity. Corresponding universal solution programs are compiled. Finally, according to the structural characteristics of the gantry crane And actual product parameters, numerical simulation of linear and geometric nonlinear deformation was carried out. The results were compared and analyzed, which could provide a new analysis basis for the design and safety assessment of gantry cranes.