基于间接边界元法开孔板声辐射研究

Study on Acoustic Radiation of Perforated Plate Using Indirect Boundary Element Method

针对开孔板结构进行声学数值模拟。首先利用有限元软件Patran进行开孔板建模、网格生成以及模态分析,并将模型和模态结果导入声学仿真软件Virtual.Lab Acoustics进行声辐射分析,得到开孔板结构的辐射声功率以及指向性声功率。并在此基础上研究开孔形状、开孔尺寸以及加强筋对板结构声辐射的影响,发现板结构固有频率是影响声辐射的重要因素。

The acoustic numerical simulation of perforated plate is performed.Firstly,the modeling,mesh generation and modal analysis of the perforated plate are carried out by means of the finite element software Patran.Then the numerical model and modal analysis results are imported into the acoustic simulation software Virtual.Lab Acoustics to obtain the acoustic radiation power and directional acoustic power of the perforated plate structure.Finally,the influences of opening shape,opening size and stiffener on the sound radiation of the perforated plates are analyzed.It is found that the natural frequency of the plates is an important factor affecting the sound radiation.