Naval Physical and Oceanographic Laboratory, Defense Research and Development Organisation, Thrikkakara, Kochi-686021, Kerala, India.
J Acoust Soc Am. 2011 Aug;130(2):724-30. doi: 10.1121/1.3605670.
The acoustic behavior of an acoustically transparent polyurethane and an interpenetrating polymer network of polyurethane with polydimethyl siloxane were studied using dynamic mechanical analysis, finite element modeling, and experimental evaluation of acoustic properties in a water-filled pulse tube setup. Dynamic mechanical measurements in the temperature range -50 °C to +70 °C were carried out, and the data were used for time temperature superposition to generate material behavior at high frequencies. These inputs were used for modeling the acoustic behavior of these materials using ATILA, which is a commercial finite element code, capable of computing transmission and reflection characteristics of materials. From this data, absorption characteristics were computed. The results were compared with the experimental results obtained using a water-filled pulse tube facility.
采用动态力学分析、有限元建模以及充水脉冲管装置中声学性能的实验评估研究了透明的聚氨酯以及聚氨酯与聚二甲基硅氧烷互穿网络的声学行为。在-50°C 至+70°C 的温度范围内进行了动态力学测量，并使用时温叠加法生成高频下的材料行为数据。这些输入用于使用 ATILA（一种商业有限元代码，能够计算材料的传输和反射特性）对这些材料的声学行为进行建模，ATILA 是一种商业有限元代码，能够计算材料的传输和反射特性。从这些数据中计算出了吸收特性。将结果与使用充水脉冲管装置获得的实验结果进行了比较。
