High-Fidelity Flexibility-Based Component Mode Synthesis Method with Interface Degrees of Freedom Reduction
High-Fidelity Flexibility-Based Component Mode Synthesis Method with Interface Degrees of Freedom Reduction
复制标题
基于高保真柔性的界面自由度降低的构件模态合成方法
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
D. Markovic
中科院分区：
文献类型：
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作者：
Jin‐Gyun Kim;D. Markovic
局部化拉格朗日乘子法（PALM）的结构运动方程由内变量和界面变量组成。基于PALM实现的模型降阶被称为基于柔度的构件模态综合（F-CMS），目前主要集中在降低内部自由度（DOF）或同时降低内部和界面自由度。在这项工作中，定义良好的三个层次的减少配方的F-CMS方法提出了更好的精度：内部自由度，本地化的拉格朗日乘子，和界面边界位移。建议的配方包括三个不同的减少技术的界面边界位移更好的计算效率。数值实验表明，所提出的公式可以在不影响精度的情况下进一步降低整体降阶模型，从而实现了计算成本的大幅降低.在...
The partitioned structural equations of motion via the method of localized Lagrange multipliers (PALM) consist of internal and interface variables. The model reduction achieved based on PALM is called flexibility-based component mode synthesis (F-CMS), and it thus far has concentrated on reducing the internal degrees of freedom (DOFs) or reducing the internal and interface DOFs at once. In this work, well-defined three-level reduction formulations of the F-CMS method are proposed for better precision: internal DOFs, the localized Lagrange multipliers, and the interface boundary displacement. The proposed formulations include three different reduction techniques for the interface boundary displacement for better computational efficiency. Numerical experiments indicate that the proposed formulations can substantially reduce the overall reduced-order models further without compromising the accuracy, thus achieving a substantial additional reduction of computational cost compared with the previous works. In a...