根据排序移除低效材料的渐进结构优化方法研究

摘要

Evolutionary Structural Optimization (ESO ) has become an important method for structural topology optimization because of its simple computation principles and easy popularization and application. A number of studies that the standard for removing inefficient material would not decrease and the evolutionary rate remained all the same in the traditional ESO is found in, which would be likely to lead to the failure of optimization. So, the evolutionary structural optimization by removing inefficient material according to the rank of material' s efficiency is put forward. In this method, the quantity of removing inefficient material each time will be determined by the same ration of volume of reserved material, which can make sure the optimization proceeds gradually, even can complete some optimization work that traditional ESO cannot complete.%渐进结构优化法因计算原理简单,易于推广使用,逐步成为结构拓扑优化中的一种重要的方法.但在大量的研究中发现,传统的渐进结构优化方法优化中,移除低效材料的标准不会降低,进化率始终不变,这两方面的不足可能导致优化的失败.为此,提出根据材料效率的排序移除低效材料的渐进结构优化方法.每次移除低效材料的数量根据保留材料体积的固定比例确定.这种方法可保证优化渐进地进行,甚至可完成一些传统渐进结构优化法无法完成的优化.