摘要
为提高研球机床身的静动刚度并减少床身质量,建立床身结构的有限元模型,通过有限元分析获得机床床身的静动态特性以及低阶固有频率。在此基础上利用尺寸优化和拓扑优化设计方法,对其进行了以减轻质量和提高结构刚度为目标的结构优化设计,最终完成对床身的综合优化。将优化后的床身与原床身进行比较,结果显示:综合优化后的床身最大变形量减少了19.45%,最大应力减小了12.24%,床身的质量下降了3.52%,并且前5阶固有频率均有明显提高。通过综合优化,提高了床身的工作性能,减轻了床身质量,该研究结果对提升机床床身刚度提供参考。
In order to improve the static and dynamic stiffness and reduce the quality of the machine bed,the finite element mod⁃el of the machine bed structure was established.The static and dynamic characteristics and low⁃order natural frequency of the machine bed were obtained through the finite element analysis technology.On this basis,using the method of size optimization and topology op⁃timization,the structure optimization design aiming at reducing the mass and improving the structural stiffness was carried out,and the comprehensive optimization of the bed was finally completed.Comparing the optimized bed with the original bed,the results show that the max deformation of the bed after comprehensive optimization is reduced by 19.45%and the stress is reduced by 12.24%.The nat⁃ural frequencies of the first five orders are obviously improved,while the quality of the bed is reduced by 3.52%.Through comprehen⁃sive optimization,the working performance of the bed is improved and the weight of the bed is reduced.
作者
薛会民
王远鹏
程一夫
XUE Huimin;WANG Yuanpeng;CHENG Yifu(College of Mechanical and Equipment Engineering,Hebei University of Engineering,Handan Hebei 056038,China)
出处
《机床与液压》
北大核心
2021年第8期72-75,79,共5页
Machine Tool & Hydraulics
基金
河北省重点研发计划项目(19211906D)。
关键词
研球机床身
静力分析
模态分析
尺寸优化
拓扑优化
Grinding machine body
Static analysis
Modal analysis
Size optimization
Topological optimization
