Abstract
The topology optimization of cyclic-symmetry structures is studied by means of bi-directional evolutionary structural optimization (BESO) method. Due to the retention of non-uniform finite element discretization relative to one such type of structures, it is found that the sensitivity result depends upon the volume of the concerned finite element. As a result, different finite element discretizations will change the element removal/growth sequence in the BESO procedure. For this reason, a new concept of element sensitivity density is proposed to avoid the element-volume-dependence of the optimal design. Meanwhile, a new volume-weighted filtering technique is developed to control the checkerboard for the corresponding mesh. To verify the proposed method, a variety of numerical tests related to the concentrated load are studied in detail. Discussions show that the size effects of basic cells are important.
Original language | English |
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Pages (from-to) | 166-172 |
Number of pages | 7 |
Journal | Jixie Gongcheng Xuebao/Journal of Mechanical Engineering |
Volume | 44 |
Issue number | 3 |
DOIs | |
State | Published - Mar 2008 |
Keywords
- Cyclic-symmetry structure
- Evolutionary structural optimization
- Filtering technique
- Sensitivity density
- Size effect
- Topology optimization