摘要
以提高某型加工中心立柱的动静态特性为目的,在对立柱进行基于有限元法的静力分析和模态分析的基础上,利用折衷规划法和功效函数法对各目标进行处理,建立静刚度最大化和前两阶固有频率最大化的多目标拓扑优化数学模型;运用ANSYS对立柱进行多目标拓扑优化分析,依据分析得到的立柱结构材料最佳分布和立柱的设计经验,改进原立柱结构,再将改进后的立柱进行有限元分析验证。结果表明:改进后的立柱质量有所减小,动静态特性也得到显著改善。
Aiming to improve the dynamic and static characteristics of the machining center column, the multiobjective topology optimization model is established by handling the objectives, maximizing static stiffness and maximizing the first two order frequencies, with the manner of compromise programming method and efficacy coefficient method based on the modal analysis and the static analysis which are analyzed by using FEM. The multi- objective topology optimization analysis is performed by using ANSYS, and the modal analysis and the static analysis are performed on the column again after the column structure is improved based on the optimal distribution of the column structural materials and the design experience of column. The result shows that the mass of the column is decreased and the static and dynamic characteristics are improved significantly.
出处
《机械科学与技术》
CSCD
北大核心
2014年第7期982-986,共5页
Mechanical Science and Technology for Aerospace Engineering
基金
广西高等学校科研项目(200103YB056)
广西矿冶与环境科学实验中心项目(KH2011ZD004)资助
关键词
多目标拓扑优化
数学模型
有限元法
动静态特性
computer software
dynamic and static characteristics
finite element method
mathematical models
modal analysis
muhiobjective optimization
multiobjective topology optimization
natural frequencies
shape optimization
topology
