基于耗散极值原理的渐进结构成长方法
发布时间：2018-07-28 21:52
【摘要】：目前的传热通道设计普遍使用的是传统密度法,密度法有一个不被大家重视的问题就是伪密度问题.因为使用伪密度,每一个单元导热系数都不是真实存在的,当将这些单元筛选后,和真实值存在差异.针对此问题提出了基于火积耗散极值原理的渐进结构优化方法,通过比较分析,采用以生长为主退化为辅的策略,整体火积耗散在3个不同算例下比密度法筛选后的结果分别小了14%,24%,9%,即先生长后退化的双向渐进结构优化方法在真实情况下是一种比传统密度法更优秀的优化方法.
[Abstract]:At present, the traditional density method is widely used in the design of heat transfer channel. Because of the use of pseudo-density, the thermal conductivity of each unit is not real. When these elements are filtered, there is a difference from the real value. In order to solve this problem, a progressive structure optimization method based on the principle of fire product dissipation extremum is put forward. Through comparison and analysis, the strategy of taking growth as main degradation as auxiliary is adopted. Compared with the results obtained by the density method, the overall fire product dissipation is 14% smaller than that obtained by the density method under three different calculation cases. That is, the bidirectional progressive structure optimization method, which grows first and then degenerates, is a better optimization method than the traditional density method in the real case.
【作者单位】： 上海理工大学机械工程学院;
【基金】：国家自然科学基金资助项目(51175347)
【分类号】：TN602
，
本文编号：2151684
[Abstract]:At present, the traditional density method is widely used in the design of heat transfer channel. Because of the use of pseudo-density, the thermal conductivity of each unit is not real. When these elements are filtered, there is a difference from the real value. In order to solve this problem, a progressive structure optimization method based on the principle of fire product dissipation extremum is put forward. Through comparison and analysis, the strategy of taking growth as main degradation as auxiliary is adopted. Compared with the results obtained by the density method, the overall fire product dissipation is 14% smaller than that obtained by the density method under three different calculation cases. That is, the bidirectional progressive structure optimization method, which grows first and then degenerates, is a better optimization method than the traditional density method in the real case.
【作者单位】： 上海理工大学机械工程学院;
【基金】：国家自然科学基金资助项目(51175347)
【分类号】：TN602
，
本文编号：2151684
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