Manufacturing-Cost-Driven Topology Optimization of Welded Frame Structures
Manufacturing-Cost-Driven Topology Optimization of Welded Frame Structures
复制标题
制造成本驱动的焊接框架结构拓扑优化
DOI：
10.1115/1.4062394
复制
发表时间：
2023
影响因子：
3.3
通讯作者：
Norato, Julián A.
中科院分区：
文献类型：
--
作者：
Gu, Hongye;Smith, Hollis;Norato, Julián A.
提出了一种以制造成本最小为目标的焊接框架结构拓扑优化方法。这里考虑的结构由焊接框架结构中常见的几何基本体(如杆和板)的集合组成。几何投影技术用于将基本体映射到连续的密度场，该密度场随后用于对材料属性进行内插。在基于密度的拓扑优化技术中，随后的人造材料用于在固定网格上执行结构分析，从而避免了在设计更改时重新划分网格的需要。几何基元表示的显著优点是易于根据设计参数计算制造成本，而几何投影便于在连续的设计区域内进行分析。以二维杆、三维杆和板结构的位移约束下的制造成本最小为例，说明了该方法的有效性。
This work presents a method for the topology optimization of welded frame structures to minimize the manufacturing cost. The structures considered here consist of assemblies of geometric primitives such as bars and plates that are common in welded frame construction. A geometry projection technique is used to map the primitives onto a continuous density field that is subsequently used to interpolate material properties. As in density-based topology optimization techniques, the ensuing ersatz material is used to perform the structural analysis on a fixed mesh, thereby circumventing the need for re-meshing upon design changes. The distinct advantage of the representation by geometric primitives is the ease of computation of the manufacturing cost in terms of the design parameters, while the geometry projection facilitates the analysis within a continuous design region. The proposed method is demonstrated via the manufacturing-cost-minimization subject to a displacement constraint of 2D bar, 3D bar, and plate structures.