基于应力和基频的渐进优化法

根据工程实际要求,利用有限元法对结构进行静、模态分析。为了得到一质量减小、应力均匀、动态性能更优的结构,基于应力和频率删除准则,建立了一种改进的基于应力和基频的渐进结构优化算法。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。每迭代步单元删除后,进行孤点以及单铰支检查技术,并删除,一定程度上避免了局部模态的产生。提供的算例表明了方法的简单、有效,是ESO方法在工程应用的又一次尝试,具有一定的使用价值。

Evolutionary Structural Optimization Based on Stress and Fundamental Natural Frequency

According to real requirements of engineering,finite element method is used to analyze the static and modal characteristics of the structure.In order to obtain a structure with reduced quality,stress uniformity and better dynamic performance,and based on stress and frequency deletion standard,an improved Evolutionary Structural Optimization based on stress and fundamental natural frequency was set up.This algorithm uses sensitivity redistribution,effectively suppresses checkerboard pattern in optimization a...