双梁龙门起重机在水平载荷作用下强度与刚度分析

Strength and Rigidity Analyses of Double BOX Girder Gantry Crane Acted by Horizontal Loads

双梁龙门起重机结构是一个由主梁、支腿及横梁等组成的空间结构,精确地计算这一结构在水平载荷作用下各部仵的内力与位移是很困难的,通常将这一超静定结构简化为静定结构分析,其结果是不精确的。本文以整个结构作为计算模型,并推导出一整套在水平载荷作用下结构内力与位移的计算公式。公式的形式比较简单,精度也较高。

The doudle box girder gantry crane structure is a space structure composed by girders, legs and transverse beams. It is difficult to calculate accurately the internal forces and displacements of the parts of the structure acted by horizontal loads. Usually the statically indeterminate structure is simplified as a statically determinate structure, thus the solution will be no more than a good approximation. The authors lake the whole space structure as Calculating model and derive a series of formulas about the internal forces and displacements calculation of the structure acted by horizontal loads.The formulas are simple and relible.