为了提高声学覆盖层的仿真精度，改进原有的计算参数模型。基于集总参数法和传递矩阵法，提出声学覆盖层的一维等效模型。结合有限元法对声学覆盖层计算，计算结果表明，阻尼对吸声效率有显著作用，不同类型阻尼对吸声作用不同，结构阻尼主要影响低频区，粘性阻尼主要影响高频段。根据橡胶材料特性，结合数值计算的结果，提出一种计权的复合阻尼模型，并通过声管实验验证了有效性。提高了声学覆盖层的仿真精度，对声学覆盖层设计有重要意义。
In order to improve the simulation accuracy of the acoustic coating, the original calculation parameter model is improved. Based on the lumped parameter method and the transfer matrix method, a one-dimensional equivalent model of the acoustic coating is proposed. Combining the calculation of the acoustic coating with the finite element method, the calculation results show that damping has a significant effect on the sound absorption efficiency. Different types of damping have different effects on sound absorption. Structural damping mainly affects the low frequency range, and viscous damping mainly affects the high frequency range. According to the characteristics of rubber materials and the results of numerical calculations, a weighted composite damping model is proposed, and the effectiveness is verified by acoustic tube experiments. The simulation accuracy of the acoustic coating is improved, which is of great significance to the design of the acoustic coating.
2022,44(5): 32-36 收稿日期：2021-01-28
DOI：10.3404/j.issn.1672-7649.2022.05.007
分类号：TB564
作者简介：张帆(1997-)，男，硕士研究生，研究方向为振动与噪声
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