The ICM method with objective function transformed by variable discrete condition for continuum structure
The ICM method with objective function transformed by variable discrete condition for continuum structure作者机构:Numerical Simulation Center for EngineeringThe College of Mechanical Engineering and Applied Electronics TechnologyBeijing University of TechnologyBeijing 100022
出 版 物:《Acta Mechanica Sinica》 (力学学报(英文版))
年 卷 期:2006年第22卷第1期
页 面:68-75页
核心收录:
学科分类:08[工学] 080102[工学-固体力学] 0801[工学-力学(可授工学、理学学位)]
基 金:supported by the National Natural Science Foundation of China(10472003) Beijing Natural Science(3002002) Beijing Educational Committee Foundations(KM200410005019) Suspensofled by American MSC Company
主 题:Structural topological optimization ICM method Checkerboard patterns Mesh dependence Thedeleting rate
摘 要:ICM (Independent Continuous Mapping) method can solve topological optimization problems with the minimized weight as the objective and subjected to displacement constraints. To get a clearer topological configuration, by introducing the discrete condition of topological variables and integrating with the original objective, an optimal model with multi-objectives is formulated to make the topological variables approach 0 or 1 as near as possible, and the model reduces the effect of deleting rate on the result. The image-filtering method is employed to eliminate the checkerboard patterns and mesh dependence that occurred in the topology optimization of a continuum structure. The computational efficiency is enhanced through selecting quasi-active displacement constraints and a design region. Numerical examples indicate that this algorithm is robust and practicable, though the number of iterations is slightly increased with respect to the original algorithm.