桁架起重机主梁强度分析与结构优化

Optimization Design of Joist Gantry Crane Grider

文中通过对某门型起重机主梁力学特性的分析,考虑主梁起吊工作载荷是在主梁轨道上的移动载荷,应用有限元软件ANSYS对现有主梁进行了强度分析,计算分析结果表明其强度过于富裕,进而以主梁几种主要型钢结构参数设计变量,运用ANSYS APDL语言编制了结构优化程序,主梁结构优化结果表明,其应力分布更加合理,最大应力下降4.8%,整体重量下降16%,最大挠度上升50%,仍然符合设计标准。

The author analyze. The crane girder＇s mechanics characteristic, Considered the work load is on the crane girder track motion load, application finite element software ANSYS carries on the intensity analysis to a existing crane girder, the computation analysis result had indicated its intensity too wealthy, then think of thc crane girder＇s several kind of nlain sections parameter as design variable, use the ANSSS -APDL language establish the structure optimization procedure, the crane girder structure optinlizatiou result had indicated, its stress distrihution move reasonable, the higgest stress dropped 4.8%. the deadweight dropped 16%, and deflection rise most gleatly 50%, all the same conformed to the design standard.