基于元搜索的张力整体结构分析方法

Gebrail Bekdaş, Ayla Ocak, Sinan Melih Nigdeli, Yusuf Cengiz Toklu
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引用次数: 0

摘要

与由拉伸和压缩元件组成的标准桁架系统相比,张拉系统是一种为轻型设计提供解决方案的建筑系统。由于其结构,它们被推荐用于空间结构的设计,因为可以使用更轻且易于组装的结构元素(如电缆、绳索等)来提供所需的耐久性。本研究采用能量最小化方法解决结构元件位移问题。通过能量最小化,有望降低系统的总势能。通过最小化张拉系统模型的总势能,可以求出平衡条件下每个建筑构件的位移。通过自适应和谐搜索(AHS)算法最小化能量,对张拉体系模型进行了分析。在这项研究中,采用了两种不同的张拉结构试样。一个是悬臂梁,另一个采用循环模型,由底部和顶部的八个节点组成八个相等的八边形。此外,还对循环模型的两层迭代进行了研究。该方法对空间和平面张拉整体结构都具有很强的鲁棒性,无需设计假设即可确定各种载荷下的变形形状。TPO/MA 方法在处理非线性和勉强稳定的系统方面表现出优越性,其在不断增加的载荷和挑战性条件下保持结构形状的有效性实例就证明了这一点。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A metaheuristic-based method for analysis of tensegrity structures
Tensegrity systems are construction system that offers solutions for lighter designs compared with a standard truss system consisting of tension and compression elements. Due to their structure, they are recommended in the design of space structures due to the use of lighter and easy-to-assemble structural elements such as cables, ropes, and similar to provide the desired durability. In this study, energy minimization was carried out to solve the structural element displacements. It is expected to reduce the total potential energy of the system with minimization. By minimizing the total potential energy of the tensegrity system models, the displacement of each building element is found for the equilibrium condition. Tensegrity models were analyzed by minimizing energy via the adaptive harmony search (AHS) algorithm. In this research, two distinct tensegrity structure specimens were employed. One comprised a cantilever beam, while the other adopted a cyclic model, forming eight equal octagons from eight nodes at both the base and the top. Additionally, an examination was conducted on a two-layer iteration of the cyclic model. The method is robust for both space and planar tensegrity structures, allowing the determination of deformed shapes under various loads without design assumptions. The TPO/MA method demonstrates superiority in handling nonlinear and barely stable systems, as evidenced by examples illustrating its efficacy in maintaining structural form under increasing loads and challenging conditions.
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