论文部分内容阅读
为了提高深孔钻床床身的抗振性并减轻重量,将多频拓扑优化技术引入床身的结构设计,对其进行了动态特性研究。首先利用ANSYS有限元分析软件对原床身结构进行了模态分析,识别出床身结构的薄弱设计;其次,以床身的前三阶固有频率最大化为目标函数,以床身质量为约束条件,对床身进行多频拓扑优化;在此基础上,根据密度云图所示材料分布,对床身筋板进行重构设计;最后,对优化前后的床身进行谐响应分析,对其动态性能进行了验证。结果表明:优化后床身的前三阶固有频率显著提高,同时质量也下降了4.08%,从而达到了提高其动态性能和减重的优化目标。
In order to improve the vibration resistance of the deep-hole drilling machine bed and reduce the weight, the multi-frequency topology optimization technology is introduced into the structural design of the bed, and its dynamic characteristics are studied. Firstly, the finite element analysis software ANSYS was used to analyze the original bed structure and identify the weak design of the bed structure. Secondly, taking the first three natural frequencies of the bed as the objective function and the bed mass as the constraint The bed body is optimized by multi-frequency topology. On this basis, according to the material distribution of the density cloud, the latticed stiffeners are redesigned. Finally, the harmonic response of the bed before and after the optimization is analyzed, Performance has been verified. The results show that the natural frequency of the first three stages of the bed body is significantly improved and the mass is also decreased by 4.08%, thus achieving the optimization objective of improving the dynamic performance and reducing the weight of the bed body.