A STUDY ON THE IMPROVEMENT OF THE CONVERGENCE PERFORMANCE OF A SINGLE LOOP SINGLE VECTOR APPROACH USING THE CONJUGATE GRADIENT
The reliability-based design optimization (RBDO) approach requires a high computing cost to consider the uncertainties.In order to reduce the design cost, the single loop single vector (SLSV) approach was proposed for an efficient RBDO.This method can reduce the cost for calculating design sensitivity by elimination of the nested optimization process.However, the method may not give an accurate solution or the robustness of the solution is not guaranteed.Especially, when the function is concave, the process frequently diverges.In this research, the single loop single vector method is modified by using the conjugate gradient.The conjugate gradient is calculated with gradient directions at the most probable points (MPP) of the previous cycles.The SLSV approach using conjugate gradient is not greatly influenced by the problem characteristics and improves its convergence capability.Also, the optimization cost can be reduced and a good solution satisfying the specified reliability can be obtained.
Reliability-Based Design Optimization Single Loop Single Vector Approach Conjugate Gradient Method
Wook-Han Choi Seong-Beom Jeong Gyung-Jin Park
Dept.of Mechanical Engineering,Hanyang University,133-791,Seoul,Korea Dept.of Mechanical Engineering,Hanyang University,426-791,Ansan,Korea
国际会议
黄山
英文
1-3
2012-06-18（万方平台首次上网日期，不代表论文的发表时间）