小尺度封闭空间声场的无网格数值算法

摘要

无网格法是一种新兴的数值计算方法,具有不需要网格支持的特点.本文将该方法引入室内声学建模,推导了无网格声场数值计算模型,并将其应用于典型小尺度封闭空间内部声场的数值分析.针对声传递函数,将本方法与理论解和SYSNOISE计算结果进行了比较,并将计算的混响时间与实验测量结果作了对比,表明本方法具有良好的精度.%Meshless method is a kind of numerical approach that has been developed in recent years, which has special and excellent characteristics without the support of mesh. In this paper, the meshless model for the calculation of sound field is derived and is applied for the calculation of sound field in small enclosures. Acoustic transfer function and the reverberation time calculated by this method have been compared with that calculated by SYSNOISE and the measurement results. It is shown that the meshless method has a high accuracy for small enclosures.