空气中钢筋混凝土圆柱壳声辐射特性研究

Analysis of Acoustic Radiation from Reinforced Concrete Cylindrical Shell in Air

简支于空气中钢筋混凝土环肋壳的声固耦合问题,由于加强钢筋及环肋的作用使壳体的振动变得更为复杂,解析解解决此类问题存在困难。利用有限元软件ANSYS,分析了无肋及加肋壳体的声辐射特性,计算结果表明,采取合理的加肋措施可降低结构的辐射声压级。

The vibration of a reinforced concrete cylindrical shell with stiffened ring ribs, which is simply supported and submerged in air, is much more complicated than that of the shell without bars and ring ribs. As a result, the analytical solution to this problem is very difficult. In this study, finite element analysis program is applied to investigate the acoustic characteristics of the shell which is surrounded by internal and external air. The results show that appropriate ribs will reduce the sound pressure level of the structure-radiated noise.