金字塔型空心点阵结构的隔声特性研究

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振动与冲击 ›› 2017, Vol. 36 ›› Issue (23) : 209-215.

论文

金字塔型空心点阵结构的隔声特性研究

陈婷婷1,2，刘杰1,2，谭栋国1,2，文桂林1,2

作者信息 +

Sound insulation performance of pyramidal hollow lattice structures

CHEN Ting-ting1,2 LIU Jie1,2 TAN Dong-guo1,2 　WEN Gui-lin1,2

Author information +

文章历史 +

摘要

周期点阵结构作为新型结构运用到航天器时，需要考虑结构的轻量化和隔声效果。为了优化传统金字塔型点阵结构的轻量化设计并且提高其隔声效果，本文首先研究相同几何参数的金字塔型实心和空心点阵结构的空间构成和隔声量曲线，发现金字塔型空心点阵结构更有利于结构的轻量化并且其隔声效果在大部分频段内优于金字塔型实心点阵结构。随后基于直接声振耦合理论，本文用数值方法系统研究了金字塔型空心点阵结构的隔声特性，分析了空心杆件仰俯角、空心杆件壁厚、空心杆件长度、空心杆件截面形状以及点阵结构的晶格常数、面内尺寸等重要结构参数对金字塔型空心点阵结构隔声特性的影响，为点阵结构的声学优化提供了有意义的参考。

Abstract

Periodic lattice structures applied in spacecrafts as a new type structure require considering both structural lightweight and excellent sound insulation performance. In order to optimize the traditional pyramidal lattice structure lightweight design and improve its sound insulation effect, the space composition and sound insulation characteristics of pyramidal lattice structures with solid trusses and hollow trusses having the same geometrical parameters were studied here, it was found that the lightweight performance and sound insulation properties of pyramidal lattice structures with hollow trusses in most parts of frequency domain are better than those of pyramidal lattice structures with solid trusses. Based on the direct acoustic-vibration coupling theory, the sound insulation characteristics of pyramidal lattice structures with hollow trusses were studied systematically with numerical methods. The influences of several key structural parameters of hollow truss, such as, elevation angle, wall thickness, length, and cross section shape as well as crystal lattice constant and in-plane size of lattice structure on sound insulation characteristics of the system were analyzed. The results provided a reference for the acoustic optimization of lattice structures.

导出引用

陈婷婷1,2，刘杰1,2，谭栋国1,2，文桂林1,2. 金字塔型空心点阵结构的隔声特性研究[J]. 振动与冲击, 2017, 36(23): 209-215

CHEN Ting-ting1,2 LIU Jie1,2 TAN Dong-guo1,2 　WEN Gui-lin1,2. Sound insulation performance of pyramidal hollow lattice structures[J]. Journal of Vibration and Shock, 2017, 36(23): 209-215

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