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


IASS Symposium 2014

SESSION: General 8: Structural Morphology

Computational generation of free-form shells based on the inverse hanging experiment

< Table of Contents for General 8: Structural Morphology
  • Proceedings Name: IASS-SLTE Symposium 2014: Shells, Membranes and Spatial Structures: Footprints
  • ISSN: (Electronic Version) 2518-6582
  • Session: General 8: Structural Morphology
  • Title: Computational generation of free-form shells based on the inverse hanging experiment
  • Author(s): Qingpeng LI, Yue WU, Shizhao SHEN
  • Keywords: structural morphology; numerical inverse hanging method; form control; form diversification; engineering practices
Abstract
Based on the mechanical balance principle, The inverse hanging experiment is a means of form generation for zero-moment structures, and has played an important role since the beginning of the research on structural morphology. However, by the restriction of the law of similarity, the test precision and other factors, this method is rarely used in practical engineering directly. But there is no denying that the inverse hanging experiment still has an important value in revealing the principle of structural morphology and generating reasonable structural form. Based on the above background, with the combination of the inverse hanging method and the nonlinear finite element method, a numerical inverse hanging method is presented. This method applies flexible cable and membrane element to simulate the inversed structure, and by introducing the bisection method to adjust the elastic modulus, the shape of the inversed structure is obtained. Moreover, the problem of form diversity for the inversed structures is discussed, more diverse shapes are obtained by changing some structural parameters or applying some additional constraints on the structures. Finally, the accuracy of the numerical method is verified by observing an experiment model and comparing its shape with the numerical simulating results, some numerical forms of one practical project is created by the numerical method to show its feasibility.

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