门式起重机支腿的整体稳定性

Integral stability of gantry crane's supporting legs

本文分析了门式起重机腿端约束,侧移及正、反对称屈曲形式对支腿整体稳定性的影响。根据弹性稳定理论,建立腿端转角方程,并由此导出稳定方程。利用计算机数值求解,得到多种门式起重机结构形式腿端约束(计算)长度系数,为门式起重机支腿整体稳定性计算提供了实用的数据。

This paper analyses the influence of end constraints, side displacement, positive and negative symmetric buckling form on integral stability of gantry crane's supporting legs. Equations of end angle deformation of legs are established based on elastic stability theory, where from stability equation is deduced. Computer is used to reach a numeric solution, theoretical length coefficients Of end constraints of legs for different types of gantry crane structures are obtained. Practically applicable data are provided for integral stability calculation of gantry crane's supporting legs.