| 杨婉雨,尹铫,李超,白国锋.一种用于水声材料设计的动态参数测试方法[J].声学技术,2022,41(2):186~192 |
| 一种用于水声材料设计的动态参数测试方法 |
| A test method of dynamic parameters for underwater acoustic material design |
| 投稿时间：2021-01-01 修订日期：2021-03-08 |
| DOI：10.16300/j.cnki.1000-3630.2022.02.006 |
| 中文关键词: 复杨氏模量 泊松比 Havriliak-Negami(H-N)模型 材料参数主曲线 吸声系数 |
| 英文关键词: complex Young‘s modulus Poisson’s ratio Havriliak-Negami (H-N) model master curve of material parameters sound absorption coefficient |
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| 中文摘要: |
| 针对提高水声材料设计中动态参数输入精度的问题，提出了一种复杨氏模量及泊松比准确测试方法。对于复杨氏模量测试，通过将Williams-Landel-Ferry (WLF)方程引入到Havriliak-Negami (H-N)模型中，采用信赖域反射算法对未知参数进行拟合得到材料参数宽频域主曲线。对于泊松比测试，根据同一材料不同形状因子表观杨氏模量之比与泊松比存在唯一量化关系的特性，仅通过两种不同形状因子试样的准静态有限元模拟，获得表观杨氏模量比值与泊松比量化曲线。因此，根据橡胶样品表观杨氏模量测试结果，可以直接利用局部加权回归获得其泊松比。最后，将前述材料制成直径为55 mm、厚度为50 mm的声管样品，放置在水声管中进行吸声系数测试。同时，把橡胶的复杨氏模量和泊松比的测量结果输入到水-橡胶-水分层介质模型中进行吸声系数计算。结果表明两者吻合，验证了上述测试方法的正确性和有效性。 |
| 英文摘要: |
| Aiming at the problem of improving input precision of dynamic parameter in the design of underwater acoustic materials, a method of accurately testing the complex Young’s modulus and Poisson’s ratio is proposed. By introducing the Williams-Landel-Ferry (WLF) equation into the Havriliak-Negami (H-N) model, the trust region reflection algorithm is used for unknown parameters fitting to obtain the master curves of material parameters in a wide frequency domain. For the Poisson's ratio test, based on the unique quantitative relationship between Poisson's ratio and apparent Young’s modulus ratio of the same material with variable shape factors, the quantitative curves of apparent Young’s modulus ratio and Poisson's ratio are obtained only by performing the finite element simulation on two samples with different shape factors under static compression. Therefore, according to the measured result of apparent Young’s modulus of rubber sample, the Poisson's ratio can be directly obtained by local weighted regression. The aforementioned material is used to make an acoustic tube sample with a diameter of 55 mm and a thickness of 50 mm for testing its sound absorption coefficient. At the same time, the measured results of complex Young’s modulus and Poisson’s ratio of rubber are input into the water-rubber-water layered medium model to calculate the sound absorption coefficient, which is in consistent with the result of acoustic tube test. Therefore, the correctness and effectiveness of the test method mentioned above is verified. |
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