噪声与振动控制2018，Vol.38Issue(z1)：79-82,4.DOI:10.3969/j.issn.1006-1355.2018.Z1.016
降低四边固支矩形板声辐射的方法和实验验证
The Method for Reducing Acoustic Radiation of Rectangular Plates with Clamped Edges and its Experimental Verification
牛群 1陈天宁 2王小鹏1
作者信息
- 1. 西安交通大学 机械工程学院,西安 710049
- 2. 西安交通大学 机械结构强度与振动国家重点实验室,西安 701149
- 折叠
摘要
Abstract
Radiation sound caused by structural vibration is a widespread noise in our life. Acoustic radiation efficiency is an important indicator to evaluate the structure’s sound radiation ability. In this paper, based on the theory of acoustic radiation, the formula of acoustic radiation efficiency of the clamped rectangular plates was deduced and the acoustic radiation efficiency of structural modals was calculated by reasonably choosing the base modal functions. It is pointed out that suppressing the amplitudes of odd-odd modes can effectively reduce the sound radiation of the plates. Finally, it is concluded that the odd-odd mode is the dominant mode of acoustic radiation. This conclusion was verified by measurement of the vibration modes and the test of sound insulation ability of the clamped rectangular plates.关键词
声学/声辐射效率/结构振动模态/固支边界/模态测试/隔声测试Key words
acoustics/acoustic radiaton effiency/structure vibration mode/clamped edges/modal test/sound insulation test分类
数理科学引用本文复制引用
牛群,陈天宁,王小鹏..降低四边固支矩形板声辐射的方法和实验验证[J].噪声与振动控制,2018,38(z1):79-82,4.
