Condensation modeling of the linear structure with nonlinear boundary conditions
Condensation modeling of the linear structure with nonlinear boundary conditions
复制标题
具有非线性边界条件的线性结构的凝聚建模
DOI：
10.1007/s00419-021-01922-4
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发表时间：
2021-02
影响因子：
2.8
通讯作者：
Wang Wei
中科院分区：
文献类型：
--
作者：
Ma Zhi-Sai;Chang Hong-Zhen;Ding Qian;Wang Wei
提出了一种新的凝聚建模方法，以更有效的方式对具有非线性边界条件的线性结构进行建模。所提出的方法的核心思想是减少被分析的非线性连接结构的自由度（DOF）的总数，这可以通过以下两个步骤来实现。首先，通过使用自由界面模态综合法的有限元模型降阶截断结构的线性自由度，因为具有大量自由度的结构的控制方程的数值积分总是耗时的。其次，通过坐标缩聚法减少边界界面处的非线性自由度，从而进一步减小被分析结构的模型尺寸，使后续分析具有计算效率和内存经济性。所提出的冷凝建模方法的性能进行了验证，通过案例研究的重点是可调边界条件的实验结构。对比结果表明，采用该方法对具有非线性边界条件的线性结构进行建模，在保证精度的同时，可以极大地提高计算效率。
The problem of modeling for the linear structure with nonlinear boundary conditions in a more efficient manner is considered by proposing a novel condensation modeling method. The key idea of the proposed method is to reduce the overall number of degrees-of-freedom (DOFs) for the nonlinear jointed structure being analyzed, which can be implemented in the following two steps. Firstly, linear DOFs of the structure are truncated via finite element model reduction by using the free-interface mode synthesis method, as numerical integration of governing equations of structures with large numbers of DOFs is always time-consuming. Secondly, nonlinear DOFs at the boundary interface are reduced via coordinate condensation, so as to further minimize the model size of the structure being analyzed and make the subsequent analysis computationally efficient and memory economical. The performance of the proposed condensation modeling method is validated via case studies focused on an experimental structure with adjustable boundary conditions. Comparative results demonstrate that the computational efficiency can be extremely improved while the accuracy is simultaneously guaranteed by using the proposed method to model the linear structure with nonlinear boundary conditions.
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影响因子：
4.7
作者：
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通讯作者：
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影响因子：
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作者：
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作者：
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通讯作者：
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DOI：
10.1002/nme.1620121108
发表时间：
1978
影响因子：
2.9
作者：
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通讯作者：
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