金属橡胶材料声学特性参数经验公式建立

Development of Empirical Formula for Acoustic Characteristic Parameters of Metal Rubber

研究了适用于恶劣环境吸声降噪需要的金属橡胶材料声学特性。根据纤维材料声学特性参数——特性阻抗和传播常数是频率与流阻率比值的幂函数关系的经验模型,通过试验研究建立了金属橡胶材料声学特性参数的经验公式。由声学特性参数经验公式计算了不同特征参数金属橡胶材料吸声系数,并与试验结果进行了比较分析。研究结果表明:建立的金属橡胶材料声学特性参数经验公式与材料实际结构特性符合较好,验证了采用该经验模型研究金属橡胶材料吸声降噪性能的有效性。

Acoustic characteristics of metal rubber material under extremely severe conditions are presented.Based on the acoustic characteristic parameters of fiber materials,that is,the characteristic impedance and transmission constant are an exponential function of the ratio of frequency to flow resistivity.An empirical formula of acoustic characteristic parameters of metal rubber material is given through experiments.Sound absorption coefficients of metal rubber materials under different characteristic parameters...