冷镦机床身的多约束拓扑优化与再设计

Multi-constraint topology optimization and redesign of heading machine bed

常规设计下的冷镦机床身存在较大的减重空间。针对冷镦机床身的结构和工作特点,以床身整体应变能最小为目标函数,以体积、最大应力、最大位移和固有频率为约束,建立多约束拓扑优化模型;并以某型号冷镦机床身为例,运用Abaqus6.11实现该床身多约束拓扑优化过程;在拓扑优化的基础上,对床身进行再设计,并着重围绕再设计中矩形孔过渡圆角半径的不同取值展开分析和比较,最终确定较优的设计方案。再设计结果显示,在较好满足床身各项静态和动态性能指标的前提下,床身体积减少可达9.6%以上。

Heading machine bed in traditional design has large weight-reducing space. Considering the structure and work- ing performance of heading machine bed, a multi-constraint topology optimization model was built with the Objective function of the minimum strain energy of the whole bed. The inherent frequency, the maximum stress and displacement of bed were set as the constraints. A type of heading machine bed was taken as an example and the process of topology optimization was accom- plished using Abaqus6.11. On the basis of the optimization, the bed was redesigned and the relatively optimized schemes were obtained through the analysis and comparison of different fillet radius of the redesigned rectangle holes. The redesign results showed that the volume of bed was reduced by more than 9.6% while the requirements of the static and dynamic performance index were satisfied.