摘要
为了提高渐进结构优化方法用于频率优化时计算效率和质量,首先提出了灵敏度变化率的概念。在此基础上,结合ESO方法和频率灵敏度,建立了结构有限单元增、删的准则,给出了一种新的频率优化算法。该算法采用了灵敏度再分配法,有效抑制了优化中的棋盘格,提高了优化效果。提供的算例表明了该方法在频率优化时的效率和准确性方面有一定程度的提高。
In order to improve computational efficiency and quality when evolutionary structural optimization was used for frequency optimization, this paper proposed the concept of sensitivity rate of change. Then it was used as the rule of element addition in a new evolutionary structural optimization for frequency optimization. Sensitivity redistribution method was applied and checkerboard pattern was significantly suppressed. The examples demonstrated that ,to some extent, the proposed method improved the efficiency and accuracy in frequency optimization.
出处
《机械》
2011年第7期17-22,共6页
Machinery
关键词
渐进优化
频率优化
灵敏度变化率
evolutionary structural optimization
frequency optimization
sensitivity rate of change
