论文信息 - Comparative Study of Approximate Optimization Techniques in CAE-Based Structural Design

Comparative Study of Approximate Optimization Techniques in CAE-Based Structural Design

The comparative study of regression-model-based approximate optimization techniques used in the strength design of an automotive knuckle component that will be under bump and brake loading conditions is carried out. The design problem is formulated such that the cross-sectional sizing variables are determined by minimizing the weight of the knuckle component that is subjected to stresses, deformations, and vibration frequency constraints. The techniques used in the comparative study are sequential approximate optimization (SAO), sequential two-point diagonal quadratic approximate optimization (STDQAO), and approximate optimization based on enhanced moving least squares method (MLSM), such as CF (constraint feasible)-MLSM and Post-MLSM. Commercial process integration and design optimization (PIDO) tools are utilized for the application of SAO and STDQAO. The enhanced MLSM-based approximate optimization techniques are newly developed to ensure constraint feasibility. The results of the approximate optimization techniques are compared with those of actual non-approximate optimization to evaluate their numerical performances.

Chang Yong Song | Jongsoo Lee

[1] F. van Keulen,et al. Framework for sequential approximate optimization , 2004 .

[2] Gyung-Jin Park,et al. A development of move limit strategy based on the accuracy of approximation for structural optimization , 1997 .

[3] Chang Yong Song,et al. A realization of constraint feasibility in a moving least squares response surface based approximate optimization , 2011, Comput. Optim. Appl..

[4] Jerome Sacks,et al. Designs for Computer Experiments , 1989 .

[5] Dong-Hun Choe,et al. Design Optimization Using Two-Point Diagonal Quadratic Approximation , 2001 .

[6] J. Tu,et al. An Indicator Response Surface Method for Simulation-Based Reliability Analysis , 2008 .

[7] Peter Lancaster,et al. Curve and surface fitting - an introduction , 1986 .

[8] R. Haftka,et al. Elements of Structural Optimization , 1984 .

[9] G. Box,et al. On the Experimental Attainment of Optimum Conditions , 1951 .

[10] Timothy W. Simpson,et al. Metamodels for Computer-based Engineering Design: Survey and recommendations , 2001, Engineering with Computers.

[11] J.-S. Lee,et al. Strength design of a knuckle component using moving least-squares response-surface-based approximate optimization methods , 2009 .

[12] Dong-Hoon Choi,et al. Enhanced two-point diagonal quadratic approximation methods for design optimization , 2008 .