Abstract
Because frequency constraint is the key constraint for dynamic topology optimization of truss, in this paper, a new method for extremum calculation of natural frequency for truss is put forward-an optimization method based on virtual material. It is optimized in two levels with sensitivity analysis; there are nodal design variables and cross-section area variables of truss elements, the bars related to the removed nodes being assigned new material properties; then the extremum of natural frequency is calculated with steepest descent method (SDM). The results of a numerical example and their analysis show preliminarily that the proposed method is correct and effective.
| Original language | English |
|---|---|
| Pages (from-to) | 498-502 |
| Number of pages | 5 |
| Journal | Xibei Gongye Daxue Xuebao/Journal of Northwestern Polytechnical University |
| Volume | 31 |
| Issue number | 3 |
| State | Published - Jun 2013 |
Keywords
- Extremum of natural frequency
- Natural frequencies
- Sensitivity analysis
- Steepest descent method
- Topology
- Trusses
- Virtual material