基于人工制造约束的三维拓扑优化设计方法

Three-Dimensional Topology Optimization Based on Artificial Manufacturing Constraints

为了更好地解决三维拓扑优化工程实用化的问题,提出了基于人工制造约束的拓扑优化设计方法。该方法在拓扑优化过程中实时地监控拓扑优化结果,并借助设计人员的工程经验,实时地加入符合制造工艺成型的约束条件辅助计算进行机拓扑优化设计。钢结构拱桥算例中以有限元软件ANSYS为平台进行二次开发、以双向渐进结构优化法为核心算法通过人为干预实现了在拓扑优化过程中钢结构拱桥斜支撑向竖直支撑的转变。通过对比发现该方法的优化结果与实际拱桥模型结构相似,表明了该方法是有效的和可行的。

In order to solve the engineering application problems of three-dimensional topology optimization,an approach of topology optimization based on artificial manufacturing constraints is proposed.During the topology optimization,the optimal result is monitored in real time;besides,according to the result and the experience of designers,some forming process corresponded manufacturing constraints are applied to optimization to assist computer in real time.Achieving the transform from tilt support to vertical support of the steel arch bridge though ANSYS-based secondary development and artificial intervention in the optimization of the steel arch bridge whose kernel algorithm is BESO.Though comparing,the structure form of the optimized bridge is similar to the practical bridge.Therefore,the method is effective and feasible for structural optimization.