The effects of membrane thickness and asymmetry in the topology optimization of stiffeners for thin-shell structures

摘要: Thin-walled shell structures are extensively used in architecture and engineering owing to their light weight ease of shaping. But they suffer from poor overall stiffness, something addressed by the strategic addition stiffeners. The optimization stiffeners is divided between those that include membrane do not. However, no studies were found indicate when it necessary or valid use either approach. In most cases was also symmetry forced stiffening layers. These two effects investigated, following conclusions reached. Membranes with thicknesses less than 20% structure not affect final topology, whereas greater must be included as have a considerable effect. When bending loadings present, should forced, otherwise suboptimal designs generated.