摘要
针对机床拓扑优化效果不理想的问题,提出机床多截面拓扑优化方法。对拓扑优化中的过滤区域和体积约束进行改进;通过悬臂梁算例验证改进后的拓扑优化方法的有效性,并以THM6380的床身为例,将多截面拓扑优化方法运用于机床结构拓扑优化。通过优化结果对比分析,在保持床身动静态特性基本稳定的情况下,床身重量减小了20.1%,相比采用Opti Struct模块进行三维拓扑优化,缩短了优化时间,且优化效果更为明显,为多截面拓扑优化方法在机床大件结构优化中的运用做了有益的尝试。
Aiming at solving the problems in topology optimization of machine tool structures,multi-section topology optimization approach is proposed in this paper. Firstly, filtering area and volume constraint of to-pology optimization are modified. Then, cantilever beam, a well-known test example in topology optimiza-tion, is employed to validate the modified method. In the case study section, structure of a machine tool bed is optimized by the virtue of the proposed multi-section topology optimization approach. The bed is lightened by 20. 1%. Compared with the 3D topology optimization results obtained from OptiStruct module in Hyper-works sofware, the proposed optimization approach is less-time-consumed and more accurate. It can be con-cluded that the multi-section topology optimization technique is effective to optimize machine tool structures.
出处
《组合机床与自动化加工技术》
北大核心
2014年第12期5-9,共5页
Modular Machine Tool & Automatic Manufacturing Technique
基金
国家科技重大专项"高档数控机床与基础制造装备"课题(2013ZX04005-012)
关键词
拓扑优化
机床
移动近似算法
SIMP
topology optimization
machine tool
method of moving asymptotes
SIMP
