ME Graduate Seminar

Thursday, February 9 at 3:30 pm to 4:20 pm
Seamans Center, 3505 SC
103 South Capitol Street, Iowa City, Iowa

"Combined Geometry and Physics Based Methods for Design-Space Dimensionality Reduction in Simulation-Based Shape Optimization" presented by Dr. Matteo Diez, Ph.D., Research Scientist at National Research Council of italy, Marine Technology Center Institute (CNR-INSEAN), visiting Research Scholar at University of Iowa, IIHR. Abstract: In simulation-based shape optimization, design improvements significantly depend on the dimension and extension of the design space: high dimensional and variability spaces are more difficult and computationally expensive to explore (especially if high-fidelity computations are used) but, at the same time, potentially allow for bigger improvements. The assessment and breakdown of the design-space dimensionality and variability are therefore a key element for the success of the optimization procedure. A method based on the Karhunen-Loève expansion (KLE) is presented for the assessment and breakdown of the geometric variability embedded in the design space and the definition of a reduced-dimensionality global model of the shape modification vector. The method improves the optimization efficiency by reparametrization and dimensionality reduction of the design space. These are performed before optimization is carried out. An extension of the method is also presented and discussed, introducing a combined geometry and physics based formulation. The extension improves the effectiveness of the dimensionality reduction, bringing physics based information (provided by low-fidelity computations) into the variability breakdown analysis, and allows for an augmented design-space assessment and exploration. Individuals with disabilities are encouraged to attend all University of Iowa sponsored events. If you have a disability that requires an accommodation in order to participate in this program, please call the department  in advance, at 335-5939.

Contact Info: MIE Office, mie-engineering@uiowa.edu, 319.335.5939