In the direct method of shape optimum design, mesh regridding is a necessary step in avoiding the distortion of finite element grids. The effect of internal-nodal movements on the shape design sensitivity associated with the regridding process has been carefully examined in this paper. It shows that to maintain computational accuracy, the effects of internal-nodal movement should be considered in shape design sensitivity analysis. To take the internal-nodal movement into account, the numerical accuracy of the speed method is investigated. A new approach, which constructs the velocity field over the element domain, is presented. Although it takes more computational time, the new approach does improve the accuracy of shape design sensitivity.
All Science Journal Classification (ASJC) codes
- Aerospace Engineering