摘要
针对变密度法和渐进结构优化法的缺点,提出了一种基于单元应力选择的双向渐进结构优化法。利用APDL语言对ANSYS单元的删除和添加功能进行二次开发,通过删除和添加单元,得到满足目标体积的拓扑结构,在此基础上,按照应变能水平高低,在保证体积不变的前提下,进一步恢复和删除单元,得到最优的拓扑结构。该方法综合考虑了结构体积的变化和单元的应力水平,避免了经验计算和振荡现象,有效提高了优化质量和计算效率。文中给出了算法的基本原理和步骤,并以TBT-ML500深孔钻床刀杆箱为研究对象,对其进行了拓扑优化和重构设计。结果表明,优化后刀杆箱的应力和变形量均降低,同时整体质量减少了9.26%,实现了刀杆箱的刚度最大化,同时也验证了该算法的有效性。
To avoid the disadvantage of the variable density method and evolutionary structural optimization method, a bidirectional evolutionary structural optimization method based on the element stress is proposed. Secondary development of deleting and adding function about element is achieved using APDL of ANSYS software, the topology structural of the target volume is acquired by deleting and adding units, on this basis, according to the level of strain energy, ensuring the volume of the same premise, and recover and delete units further, the optimal topology institution is obtained. The stress level of the structure and volume changes in cells are considered in this method, the oscillation is avoided, quality and optimize efficiency are improved. The basic principles and steps of the algorithm are presented. TBT-ML500 arbor box of deep hole drilling machine is taken as the research object, the topology optimization design and remodeling are worked out. The results show that the stress and deformation of arbor box are decreased, while its overall weight is decreased by 9.26%, maximum stiffness of the arbor box is achieved, and the validity of the algorithm is verified.
出处
《机械设计》
CSCD
北大核心
2018年第2期23-27,共5页
Journal of Machine Design
基金
国家自然科学基金资助项目(51175482)
山西省回国留学人员科研资助项目(2014050)
山西省国际科技合作资助项目(2015081016)
