高强度聚氯乙烯泡沫水声模量参数反演修正

胡泊; 吴崇建; 何其健; 肖伟; 李磊鑫; 李想

doi:10.19693/j.issn.1673-3185.02588

高强度聚氯乙烯泡沫水声模量参数反演修正

doi: 10.19693/j.issn.1673-3185.02588

1.
中国舰船研究设计中心，湖北武汉 430064
2.
洛阳船舶材料研究所，河南洛阳 471023

详细信息

作者简介:
胡泊，男，1993年生，博士生，工程师

吴崇建，男，1960年生，博士，研究员，博士生导师

何其健，男，1983年生，硕士生

通信作者:
吴崇建

中图分类号: U668.5
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- 被引次数: 0
出版历程
- 收稿日期: 2021-11-11
- 修回日期: 2022-03-01
- 网络出版日期: 2023-03-31
- 刊出日期: 2023-04-28

Parameter inversion and amendment of underwater acoustic modulus of high-strength PVC foam

1.
China Ship Develop and Design Center, Wuhan 430064, China
2.
Luoyang Ship Material Research Institute, Luoyang 471023, China

高强度聚氯乙烯泡沫水声模量参数反演修正由胡泊，等创作，采用知识共享署名4.0国际许可协议进行许可。

摘要

摘要: 目的旨在基于复合材料试样水声插入损失实测值，通过反演算法获得高强度聚氯乙烯（PVC）泡沫的水声模量值，进而提高复合材料水声插入损失计算精度。方法首先，通过压缩、平拉等力学试验，得到高强度PVC泡沫材料的静弹性模量，再利用传递矩阵方法计算得到夹芯复合材料的插入损失，并分析得出插入损失计算值与基于脉冲声管法的实测值存在较大差异的原因是芯材弹性模量输入值偏低。然后，基于插入损失实测值，采用遗传算法反演计算出５组泡沫材料的水声模量值。结果定量计算结果表明，高强度PVC泡沫的水声模量值高于静弹性模量值，水声模量对压缩模量比值的平均值为1.24，对拉伸模量比值的平均值为1.36。结论在对基于高强度PVC泡沫的夹芯复合材料水声性能进行计算时，材料弹性模量输入值应在静力模量实测值基础上正向修正，从而降低误差。
- 聚氯乙烯泡沫 /
- 插入损失 /
- 遗传算法 /
- 弹性模量 /
- 纵波声速
Abstract: Objective The purpose of this paper is to obtain the hydro-acoustic modulus of high-strength polyvinyl chloride (PVC) foam through an inversion algorithm based on the measured underwater acoustic insertion loss values of the composite samples, then improve the calculation accuracy of the insertion loss of the composites. Methods First, the static elastic modulus of high-strength PVC foam is obtained through mechanical tests such as compression and tension, and then the insertion loss of the sandwich composite is calculated using the transfer-matrix method. The reason for the large difference in the calculated values and the measured values obtained by the acoustic pulse-based tube method is that the input value of the elastic modulus of the core material is low. Based on the measured insertion loss values, the underwater acoustic modulus values of five PVC foam samples are then calculated via genetic algorithm inversion. Results The quantitative calculation results indicate that the hydro-acoustic modulus value of high-strength PVC foam is higher than the measured static elastic modulus values. The average ratio of hydro-acoustic modulus to compressive modulus is 1.24, and that to tensile modulus is 1.36. Conclusion When calculating the hydro-acoustic performance of sandwich composites containing high-strength PVC foam, the error can be reduced by positively correcting the input value of the material's elastic modulus on the basis of the measured value of the static modulus.
- PVC foam /
- insertion loss /
- genetic algorithm /
- elastic modulus /
- longitudinal wave velocity

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图 1 多层介质传递矩阵原理

Figure 1. Transfer matrix theory of multi-layer medium

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图 2 VS1～VS5泡沫材料试样的应力−应变曲线

Figure 2. Stress-strain curves for foam samples VS1−VS5

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图 3 夹芯复合材料结构示意图

Figure 3. Structure of PVC foam-core sandwich composite

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图 4 VS-1～VS-5夹芯复合材料试样

Figure 4. Samples of sandwich composite with PVC foam-core VS-1−VS-5

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图 5 VS-1夹芯复合材料插入损失计算值与实测值对比

Figure 5. Comparison of calculated and measured insertion loss of VS-1 PVC foam-core sandwich composites

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图 6 遗传算法种群迭代进化示意图

Figure 6. Iterative evolution of genetic algorithm population

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图 7 VS1～VS5试样基于反演模量的插入损失计算值与实测值对比

Figure 7. Comparison of insertion loss between inverse modulus based calculation and measurement for samples VS-1−VS-5

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表 1 泡沫静弹性模量测试值

Table 1. Summary of test results for static elastic modulus of foam

试样	密度/(kg·m⁻³)	压缩模量/MPa	拉伸模量/MPa
VS-1	303.0	635.2	558.9
VS-2	303.9	629.3	627.7
VS-3	297.2	614.3	577.2
VS-4	315.9	704.6	582.0
VS-5	310.2	626.8	593.7

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表 2 材料模量的反演值与测试值对比

Table 2. Summary of inversion and measured values for material modulus

试样	水声模量反演值/MPa	压缩模量值/MPa	拉伸模量值/MPa	水声模量与压缩模量比值	水声模量与拉伸模量比值
VS-1	806.8	635.2	558.9	1.270	1.444
VS-2	801.7	629.3	627.7	1.274	1.277
VS-3	704.5	614.3	577.2	1.147	1.221
VS-4	856.9	704.6	582.0	1.216	1.472
VS-5	813.4	626.8	593.7	1.298	1.370

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