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Erschienen in: Acta Mechanica Sinica 6/2018

06.07.2018 | Research Paper

A modified stiffness spreading method for layout optimization of truss structures

verfasst von: Mingjie Cao, Haitao Ma, Peng Wei

Erschienen in: Acta Mechanica Sinica | Ausgabe 6/2018

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Abstract

The stiffness spreading method (SSM) was initially proposed for layout optimization of truss structures, in which an artificial elastic material of low modulus is uniformly distributed in the design domain to create connections between discrete members. In this paper, a modified stiffness spreading method is proposed by replacing the artificial elastic material with auxiliary bars to connect real members of the truss structure. Since the background continuum mesh for the elastic material is no longer required, the computational cost is significantly reduced. Like SSM, the new method is advantageous in that an initial design may consist of disconnected bars allocated in the design domain, and mathematical programming methods can be applied for the efficient solution of the formulated optimization problem. A number of solution strategies are also developed to achieve more practical designs with lower computational cost. Numerical examples of both 2-D and 3-D truss structures are presented to demonstrate the feasibility, robustness and effectiveness of the proposed method.

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Metadaten
Titel
A modified stiffness spreading method for layout optimization of truss structures
verfasst von
Mingjie Cao
Haitao Ma
Peng Wei
Publikationsdatum
06.07.2018
Verlag
The Chinese Society of Theoretical and Applied Mechanics; Institute of Mechanics, Chinese Academy of Sciences
Erschienen in
Acta Mechanica Sinica / Ausgabe 6/2018
Print ISSN: 0567-7718
Elektronische ISSN: 1614-3116
DOI
https://doi.org/10.1007/s10409-018-0776-x

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