工字型建筑构件隔声的计算

Calculation for I-section panel wall sound insulation

根据工字型建筑构件的构造特点,应用统计能量分析理论,建立工字型构件的隔声计算模型.通过求解能量传递与平衡方程,计算各子系统的损耗系数和子系统之间的耦合损耗系数,得出构件两边的声压级差.与隔声实验和质量定律计算的结果相比,应用统计能量分析方法计算的结果与实验符合得很好,具有较高的精确性.此方法可以进一步解决构造复杂墙体的隔声问题,通过改进墙体构造,提高隔声性能.

A model has been established in the light of the structural characteristics of Isection panel walls using the statistic energy analysis theory for calculation of Isection panel wall sound insulation. The difference between the sound pressures at either side of the panel wall is obtained by solving energy transfer and balance equations and calculating loss coefficient of each subsystem and coupling coefficient among subsystems. In comparison with the result of calculation obtained by using the mass law theory, the result of calculation obtained by using the statistic energy analysis theory is in a better agreement with the experimental result, and has higher accuracy. This method can be further used to solve the sound insulation problem of complicated panel walls, so that their sound insulation can be improved by improving their structures.