Title of Paper:Optimization of balloon-stent system based on nonlinear material using kriging surrogate model

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Date of Publication:2012-03-17

Included Journals:EI、CPCI-S、Scopus

Volume:502

Page Number:463-468

Key Words:Computer-aided technology; Finite element method; Balloon-stent system; Kriging surrogate model; Optimization

Abstract:Computer-aided technology was used for balloon-stent system design. Nonlinear material was used to simulate the dilation of balloon-stent system. Based on finite element results, an adaptive optimization method based on the kriging surrogate model combining with LHS approach and EI function was employed for the optimization of balloon length to reduce stent dogboning effect during its dilation. The kriging surrogate model can approximate the relationship between dogboning rate and balloon length, replacing the expensive reanalysis of the stent dilation. Sample points from LHS can represent the information of all parts on the design space. EI function is used to balance local and global search, and tends to find the global optimal design. Numerical results demonstrate that this adaptive optimization methed based on kriging surrogate model can be used for the optimization of balloon length of balloon-stent system.