| 基于虚功原理索杆张力结构强度优化形状分析 |
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| 引用本文： | 肖南,黄玉香,陈华鹏.基于虚功原理索杆张力结构强度优化形状分析[J].华中科技大学学报(自然科学版),2011(8):43-48. |
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| 作者姓名： | 肖南 黄玉香 陈华鹏 |
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| 作者单位： | 浙江大学建筑工程学院;格林威治大学土木工程系;天津大学建筑设计研究院; |
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| 基金项目： | 国家自然科学基金资助项目(50978228) |
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| 摘 要： | 为了提高索杆张力结构的刚度和减小结构受力,在结构杆件中引入作动器,主动调整杆件的长度,改变结构的形状.在荷载态下,将作动器主动工作产生的杆件内力改变量视为结构独立自应力模态的线性组合,根据虚功原理及变形协调关系建立了节点位移向量、杆件内力向量与作动器主动调整量之间的迭代关系.同时,以杆件受力最小为目标,构造了结构形状优化模型并编制了相应的求解程序.算例分析表明:结构所有杆件均布设作动器的效果与仅在索中布设作动器的效果相同,均可以实现既提高结构刚度、又改善结构受力的目的;仅在杆中布设作动器调节杆长来提高结构刚度的代价是增大杆件的内力.通过有限元方法与本文方法对算例求解结果的对比分析,发现两者符合较好,验证了本文方法的正确性.
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| 关 键 词： | 索杆张力结构 作动器 强度优化 形状分析 虚功原理 |
Morphological analysis of cable-strut tension structures with strength optimization using principle of virtual work |
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| Xiao Nan, Huang Yuxiang Chen Huapeng.Morphological analysis of cable-strut tension structures with strength optimization using principle of virtual work[J].JOURNAL OF HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY.NATURE SCIENCE,2011(8):43-48. |
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| Authors: | Xiao Nan Huang Yuxiang Chen Huapeng |
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| Institution: | Xiao Nan1,2 Huang Yuxiang3 Chen Huapeng2(1 College of Civil Engineering and Architecture,Zhejiang University,Hangzhou 310058,China,2 Department of Civil Engineering,University of Greenwich,Chatham Maritime,Kent,ME4 4TB,UK,3 Tianjin University Research Institute of Architectural Design,Tianjin 300072,China) |
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| Abstract: | In order to increase the stiffness and reduce the internal forces of cable-strut tension structures,actuators were employed to actively adjust the geometry of structures.The internal force variables of structural members generated from the actively working actuators were taken as a linear combination of the independent self-stress modes under loading.The iterative relationship existing in nodal displacement vector,internal force vector of members and active deformation of actuators was derived based on the ... |
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| Keywords: | cable-strut tension structure actuator strength optimization morphological analysis principle of virtual work |
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