复合材料夹芯圆柱壳水下振声性能试验研究

doi:10.11896/cldb.17100158

材料导报

2019, Vol. 33

Issue (10): 1728-1733 https://doi.org/10.11896/cldb.17100158

金属与金属基复合材料

复合材料夹芯圆柱壳水下振声性能试验研究

仝博, 李永清, 朱锡, 张焱冰

海军工程大学舰船工程系,武汉 430033

Underwater Vibro-acoustic Behavior of Composite Cylindrical Shell with Sandwich Structure: an Experimental Study

TONG Bo, LI Yongqing, ZHU Xi, ZHANG Yanbing

Department of Naval Architecture Engineering, Naval University of Engineering, Wuhan 430033

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摘要为了评估复合材料夹芯圆柱壳的振动和声辐射特性,专门设计了一个复合夹芯圆柱壳模型以及一个等质量的钢壳作为对比模型,进行水下振动和声辐射试验。试验结果表明:吸声壳和钢壳前七阶固有频率测试值与有限元仿真结果吻合较好,说明了实验结果的可靠性。钢壳和复合材料壳频响测试曲线与数值仿真结果在低频段的吻合程度更高,且钢壳频响测试曲线与有限元计算曲线吻合程度优于复合材料夹芯壳。从复合材料夹芯壳的减振效果来看,试验测试平均减振18.3 dB,数值计算结果平均减振18.9 dB,说明该芯材壳体具有良好的阻尼性能。从复合材料夹芯壳低频段的吸声效果来看,八个方位角处声压级最大降幅为5.05 dB,平均降幅为2.28 dB,表明该复合材料夹芯圆柱壳能够有效抑制低频线谱噪声。

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关键词: 复合材料夹芯壳振动声辐射

Abstract: Aiming at evaluating the vibro-acoustic behavior of composite cylindrical shell with sandwich structure, a sandwich shell model with sound-absorbing core was designed, as well as a steel shell with equal weight for comparison. And the underwater vibration and sound radiation experiments were carried out. The experimental results revealed that the tested values of the first seven natural frequencies of both composite sandwich shell and steel shell were in good agreement with the simulated results based on finite element simulation, which verified the reliability of experiment results. The frequency response test curves of both steel shell and composite sandwich shell were consistent with the numerical simulation results in low frequency range, and the agreement in tested and simulated curves of steel shell was superior to that of composite sandwich shell. In terms of the vibration reduction effect of composite sandwich shell, there were the average reduction capacity of 18.3 dB and 18.9 dB by experimental test and numerical calculation, respectively, which showed the favorable damping performance of the sound-absorbing core. Concerning the sound absorption effect of sound absorption shell in low frequency range, there was a maximum decreasing amplitude of 5.05 dB in sound pressure level (SPL) at 8 directional angles, with an average decreasing amplitude of 2.28 dB, which indicated the effectiveness of this composite sandwich shell in reducing low frequency line-spectrum noise.

Key words: composite materials sandwich shell vibration sound radiation

发布日期: 2019-05-16

ZTFLH:	U663.9
	TH128

基金资助: 国家自然科学基金(50979110)

通讯作者: liyongqing@126.com

作者简介: 仝博,2018年毕业于海军工程大学,并获得工学博士学位。主要从事船用复合材料及其应用方面的研究。李永清现为海军工程大学副教授,2008年毕业于海军工程大学舰船系,主要从事船用复合材料及其工程应用研究。

引用本文:

仝博, 李永清, 朱锡, 张焱冰. 复合材料夹芯圆柱壳水下振声性能试验研究[J]. 材料导报, 2019, 33(10): 1728-1733.
TONG Bo, LI Yongqing, ZHU Xi, ZHANG Yanbing. Underwater Vibro-acoustic Behavior of Composite Cylindrical Shell with Sandwich Structure: an Experimental Study. Materials Reports, 2019, 33(10): 1728-1733.

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http://www.mater-rep.com/CN/10.11896/cldb.17100158 或 http://www.mater-rep.com/CN/Y2019/V33/I10/1728

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