JZUS - Journal of Zhejiang University SCIENCE

Journal of Zhejiang University SCIENCE A 2014 Vol.15 No.2 P.97-107

Node shift method for stiffness-based optimization of single-layer reticulated shells*

Author(s): Chang-yu Cui^1,2, Bao-shi Jiang¹, You-bao Wang¹
Affiliation(s): 1. School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China; more
Corresponding email(s): lanbaoshihit@gmail.com
Key Words: Node shifts, Strain energy sensitivity, Structural optimization, Static stability, Imperfection sensitivity

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Chang-yu Cui, Bao-shi Jiang, You-bao Wang. Node shift method for stiffness-based optimization of single-layer reticulated shells[J]. Journal of Zhejiang University Science A, 2014, 15(2): 97-107.

@article{title="Node shift method for stiffness-based optimization of single-layer reticulated shells",
author="Chang-yu Cui, Bao-shi Jiang, You-bao Wang",
journal="Journal of Zhejiang University Science A",
volume="15",
number="2",
pages="97-107",
year="2014",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A1300239"
}

%0 Journal Article
%T Node shift method for stiffness-based optimization of single-layer reticulated shells
%A Chang-yu Cui
%A Bao-shi Jiang
%A You-bao Wang
%J Journal of Zhejiang University SCIENCE A
%V 15
%N 2
%P 97-107
%@ 1673-565X
%D 2014
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A1300239

TY - JOUR
T1 - Node shift method for stiffness-based optimization of single-layer reticulated shells
A1 - Chang-yu Cui
A1 - Bao-shi Jiang
A1 - You-bao Wang
J0 - Journal of Zhejiang University Science A
VL - 15
IS - 2
SP - 97
EP - 107
%@ 1673-565X
Y1 - 2014
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A1300239

Abstract
Chinese Summary
Academic Network
Reviewer Comment

Abstract: This paper presents a node shift method to find the optimal distribution of nodes in single-layer reticulated shells. The optimization process searches for the minimum strain energy configuration and this leads to reduced sensitivity in initial imperfections. strain energy sensitivity numbers are derived for free shift and restricted shift where nodes can move freely in the 3D space or have to move within a predefined surface respectively. Numerical examples demonstrate the efficiency of the proposed approach. It was found that optimized structures achieve higher ultimate load and are less sensitive to imperfections than the initial structure. The configuration of the final structure is closely related to factors like the initial structural configuration, spatial conditions, etc. Based on different initial conditions, architects can be provided with diverse reasonable structures. Furthermore, by amending the defined shapes and nodal distributions, it is possible to improve the mechanical behavior of the structures.

基于刚度优化的单层网壳节点移动方法

研究目的：寻找单层网壳结构的最优节点分布，提高结构刚度，改善结构整体力学性能。
创新要点：解决了单层网壳结构节点最优分布问题，实现了三种单层网壳节点位置优化的方式：自由调整，只竖向调整和在指定曲面上的调整。三种方式都可以提高结构刚度，改善结构力学性能。
研究方法：根据结构应变能对节点坐标变化的敏感度，对节点坐标进行调整，修正已有的单层网壳结构，并创构自由曲面结构（图15）。
重要结论：本文的节点移动敏感度方法在优化单层网壳结构时，不仅可以提高结构极限承载力，而且可以降低结构对初始几何缺陷的敏感度程度。

关键词：节点移动；应变能敏感度；单层网壳结构优化；静力稳定性；缺陷敏感度

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References

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基于刚度优化的单层网壳节点移动方法

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