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IASS-SLTE Symposium 2014: Shells, Membranes and Spatial Structures: Footprints


IASS Symposium 2014

SESSION: General 9: Computational Tools, Shape Finding and Optimization

Shape optimization of free-form single-layer reticulated shells based on Ansys

< Table of Contents for General 9: Computational Tools, Shape Finding and Optimization
  • Proceedings Name: IASS-SLTE Symposium 2014: Shells, Membranes and Spatial Structures: Footprints
  • ISSN: (Electronic Version) 2518-6582
  • Session: General 9: Computational Tools, Shape Finding and Optimization
  • Title: Shape optimization of free-form single-layer reticulated shells based on Ansys
  • Author(s): Yu YAN, Qilin ZHANG
  • Keywords: shape optimization, shell, ANSYS
Abstract
With the development and application of computerized design technology, architectural form of spatial structure is also more diverse. The structural behavior of free-form surface structures depends on the surface shapes. For free-form surface, it can’t be expressed by analytic functions. Based on the relationship between the height parameters of structural surface and the total structural strain energy, a morphosis method is developed to construct the arbitrary geometry of free-form shells with less thickness but better stiffness. The method of designing optimized structures is based on ANSYS software combined with the finite element technique. The strain energy was taken as the optimization object and structural height used as the optimization variable. In order to fit the original free-form surface better, the surface is created by skinning through several generatrices which are formed through key points. With this method, different structural surfaces can be obtained by adjusting design parameters such as constraint or space conditions, for designer’s reference. Finally, taken a project in Shanghai as an example, this paper details the procedure and precautions in the process of using the ANSYS optimization design module. The results proved that this method presented in this paper is not only correct and feasible, but highly effective and suitable for mostly single-layer reticulated shells with complex surface.

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