管壁振动声源传播特性及管内声场分布研究

Study on Propagation Characteristics of Sound Source and Distribution of Sound Field in Pipe Wall Vibration

摘要: 本文对管壁振动声源在管壁上传播特性及管内声场分布进行了研究。建立了有限长圆柱管道壁上振动声源传播模型，采用有限元方法计算振动声源在管壁上传播。分析了不同频率振动声源、声源尺寸、管内压力对管壁声传播的影响。并进行管道振动实验，分析了管道内不同背景流作用下管壁振动特性及管壁上脉冲振动传播特性。本文采用Comsol多物理场有限元软件计算，得到了管壁上声传播特性及轴向、周向、壁厚方向的振动特性，管内声传播情况及声场分布情况。

Abstract: In this paper, the propagation characteristics of the vibration sound source on the pipe wall and the distribution of the sound field in the pipe are studied. The vibration propagation model on the wall of a finite length cylindrical pipe is established, and the finite element method is used to calculate the vibration propagation on the wall. The influence of different frequency vibration sound source, sound source size and pressure on the sound propagation of pipe wall is analyzed. The vibration characteristics of the pipe wall under the action of different background flow and the propagation characteristics of pulse vibration on the pipe wall are analyzed. In this paper, the multi-physical finite element software COMSOL is used to calculate the sound propagation characteristics on the pipe wall and vibration characteristics in axial, circumferential and wall thickness directions, as well as the sound propagation and sound field distribution in the pipe.