在研究高声强下微圆孔声学非线性效应时,准定常模型的一个明显不足是采用固定不变的vena收缩系数,因而影响了预测精度.本文联合一种准定常方法和离散涡方法,给出了vena收缩系数随入射声强的变化曲线,并与实验结果符合得较好.将本文准定常方法与vena收缩系数曲线相结合来预测非线性声阻,不仅预测精度高,而且十分简便,适用于高声强条件下穿孔板共振吸声结构的工程设计.
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