【摘要】 以多孔金属材料在高温环境下的吸声特性研究为背景,以不锈钢纤维烧结型多孔金属材料为主要研究对象,首先在理论上研究了计算多孔材料吸声特性随温度变化的特性,然后设计并研制了一种温度可控的高温阻抗管测量装置。通过实验测试,获得了具有不同声学参数的金属纤维板在不同环境温度下的吸声系数,研究了温度对其吸声性能的影响规律。理论结果与实验结果基本吻合,证明了理论分析以及实验装置设计的合理性。更多还原

【Abstract】 To study the properties of sound absorption characteristics of porous metallic materials at high temperature conditions,the sound absorption properties of porous materials with temperature changes was studied firstly in theory.And then,a temperature-controlled high-temperature impedance tube measurement device was designed.Different results of different acoustic properties porous metal material were measured at different high temperatures,and the relationships between absorption properties and temperatures were studied.The predicted and mesured results are in good agreement basically,and the theoretical analysis and design of measuring device are reasonable.更多还原