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首页> 外文期刊>Journal of Sound and Vibration >A hybrid finite element-energy finite element method for mid-frequency vibrations of built-up structures under multi-distributed loadings
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A hybrid finite element-energy finite element method for mid-frequency vibrations of built-up structures under multi-distributed loadings

机译：分布荷载作用下组合结构中频振动的有限元-能量混合有限元方法

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摘要

In this study, a hybrid method combining finite element analysis and energy finite element analysis is developed to predict the vibrations of built-up structures in mid-frequency, and the associated general formulations are derived. The interactions between the structural components are modeled using a global matrix of the system and the reverberant blocked force. To validate the proposed method, three examples of different built-up structural systems, subjected to different types of excitations, are analyzed and discussed. These types of excitations are single point, multipoint and distributed forces on stiff member or flexible member. The results predicted by the presented method show good agreements with the dense finite element model, and the detailed local energies of the whole system are acquired under the different regional loadings. These results indicate that the proposed method can be utilized for the prediction of vibrations in the mid-frequency range.
机译：在这项研究中，开发了一种将有限元分析和能量有限元分析相结合的混合方法来预测中频结构的振动，并推导了相关的一般公式。使用系统的整体矩阵和混响阻挡力对结构部件之间的相互作用进行建模。为了验证所提出的方法，分析并讨论了不同构造结构系统在不同类型的激励作用下的三个示例。这些类型的激励是在刚性构件或柔性构件上的单点，多点和分布力。该方法预测的结果与致密有限元模型吻合良好，并且在不同区域载荷下获得了整个系统的详细局部能量。这些结果表明，所提出的方法可用于预测中频范围内的振动。

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