曹胜涛, 李志山, 刘付钧. 一种非比例振型阻尼模型及在大规模非线性分析中的应用[J]. 工程力学, 2018, 35(11): 162-171. DOI: 10.6052/j.issn.1000-4750.2017.08.0640
引用本文: 曹胜涛, 李志山, 刘付钧. 一种非比例振型阻尼模型及在大规模非线性分析中的应用[J]. 工程力学, 2018, 35(11): 162-171. DOI: 10.6052/j.issn.1000-4750.2017.08.0640
CAO Sheng-tao, LI Zhi-shan, LIU Fu-jun. A NON-PROPORTIONAL MODAL DAMPING MODEL AND ITS APPLICATION IN NONLINEAR ANALYSIS OF LARGE-SCALE STRUCTURES[J]. Engineering Mechanics, 2018, 35(11): 162-171. DOI: 10.6052/j.issn.1000-4750.2017.08.0640
Citation: CAO Sheng-tao, LI Zhi-shan, LIU Fu-jun. A NON-PROPORTIONAL MODAL DAMPING MODEL AND ITS APPLICATION IN NONLINEAR ANALYSIS OF LARGE-SCALE STRUCTURES[J]. Engineering Mechanics, 2018, 35(11): 162-171. DOI: 10.6052/j.issn.1000-4750.2017.08.0640

一种非比例振型阻尼模型及在大规模非线性分析中的应用

A NON-PROPORTIONAL MODAL DAMPING MODEL AND ITS APPLICATION IN NONLINEAR ANALYSIS OF LARGE-SCALE STRUCTURES

  • 摘要: 该文通过有限元模型的节点振型阻尼比构造了一种非比例振型阻尼模型;给出了非线性显式格式中该文模型阻尼力的高效算法,并结合实际工程对显式求解的稳定性进行了分析。将该文提出的非比例阻尼模型和高效算法在自主研发的CPU+GPU并行非线性分析软件中进行实现,对有限元模型自由度数达到百万量级的超高层钢-混凝土混合结构广西东盟塔进行动力时程分析,对该文并行算法的效率和非比例阻尼对结构动力响应的影响进行了研究。

     

    Abstract: A non-proportional modal damping model was proposed by the nodal mode-damping-ratio of a finite element model. The efficient algorithm of the damping force was presented in a nonlinear explicit format. Base on practical engineering, the stability of the explicit format was analyzed. The non-proportional damping model and efficient algorithm were implemented in CPU+GPU parallel nonlinear software. The dynamic time history response of a super high-rise steel-concrete structure, Guangxi Dongmeng tower, with millions degrees of freedom was analyzed by this software. The efficiency of parallel algorithms and the effect of non-proportional damping on the dynamic response of the structure were studied.

     

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