基于有限元能量流模型的复杂耦合结构中低频段耦合损耗因子的计算

卢兆刚;郝志勇;郑旭

振动与冲击 ›› 2011, Vol. 30 ›› Issue (11) : 42-45,5.

PDF(1145 KB)
PDF(1145 KB)
振动与冲击 ›› 2011, Vol. 30 ›› Issue (11) : 42-45,5.
论文

基于有限元能量流模型的复杂耦合结构中低频段耦合损耗因子的计算

  • 卢兆刚; 郝志勇; 郑旭
作者信息 +

The coupling loss factor calculation of the complex coupling structure based on the finite element energy flow model

  • Lu Zhao-Gang; Hao Zhi-Yong; Zheng Xu
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文章历史 +

摘要

有限元能量流模型在随机宽带激励下,得到各子系统的空间及频域平均的能量,将其代入能量平衡方程,得到了柔性体之间的间接耦合损耗因子。与传统有限元模型计算耦合损耗因子的方法相比,该方法计算效率更高;与传统统计能量分析模型计算耦合损耗因子的方法相比,该方法计算精度更加可信。最后,该方法通过试验得到了验证。

Abstract

The indirect coupling loss factor between two flexible bodies indirect coupled through a rigid body was calculated from the energy conversation equation, in which the energy of each subsystems was accounted through the Finite Element Energy Flow model excited by the random wide-band excitation. The energy of each subsystem should be space and frequency averaged. Compared with the traditional Finite Element Method, the new procedure in this paper was efficient in computation time; and was reliable compared with the traditional SEA Model. Last, the method was verified though the experiment.

关键词

中频问题 / 耦合损耗因子 / 有限元能量流模型 / 振声问题

Key words

mid-frequency problem / coupling loss factor / finite element energy flow model / vibro-acoustic problem

引用本文

导出引用
卢兆刚;郝志勇;郑旭 . 基于有限元能量流模型的复杂耦合结构中低频段耦合损耗因子的计算[J]. 振动与冲击, 2011, 30(11): 42-45,5
Lu Zhao-Gang;Hao Zhi-Yong;Zheng Xu. The coupling loss factor calculation of the complex coupling structure based on the finite element energy flow model[J]. Journal of Vibration and Shock, 2011, 30(11): 42-45,5

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