摘要
通过对某卧式加工中心的立柱筋板形式进行优化,使得其主机动态刚度提高。首先利用Solid Edge对主机建立模型,适当简化后导入ANSYS Workbench进行网格划分,并对重要结合面建模,模拟实际工况,得到主机模态振型和以主轴端面为观测点的谐响应曲线。找到主机薄弱环节,并针对立柱筋板形式加以改进。结合Workbench拓扑优化分析,去除立柱外侧壁板部分材料,使得立柱累计减轻质量931.9 kg,约占原有结构质量的9.6%。立柱优化后的主机在前六阶模态频率基本不变的情况下,X方向动刚度提高为原结构的1.82倍,Y方向动刚度提高为原结构的1.37倍。
The structure of ribs form in the column of a horizontal machining center was optimized to increase dynamic stiffness of the host. Through the establishment of three-dimensional model and surface model for host,approaching to the working conditions,the modal shape of the host and harmonic response curve of the host with spindle end as the observation point were recorded. Analyzing modal analysis results to find the weak links,and changing the ribs form structure of the column combined with Workbench topology optimization results to remove part of the material,the quality of the cumulative column was reduced up to 931.9 kg accounting for about 9.6%,X direction dynamic stiffness increased to 1.82 times by original structure,and Y direction dynamic stiffness increased 1.37 times.
出处
《机械科学与技术》
CSCD
北大核心
2015年第9期1313-1316,共4页
Mechanical Science and Technology for Aerospace Engineering
基金
国家科技重大专项项目(2013ZX04001-011)
国家973计划课题项目(2013CB035400)资助
关键词
卧式加工中心
立柱
动刚度
谐响应分析
computer software
dynamic stiffness
harmonic response analysis
horizontal machining center
mesh generation
modal analysis
natural frequencies
optimization
schematic diagrams
shape optimization
stiffness
structural optimization
three dimensional
