摘要
现代声呐探测技术的提高对水下吸声构件在低频声波的吸收性能提出了新的要求,而现有基于空腔、颗粒散射、声子晶体等结构的水下构件仍难以达到良好的吸声效果。针对以上需求,本研究设计了基于颗粒阻尼结构的水下吸声构件,通过在水下吸声阻尼聚合物中加入颗粒阻尼单元高效耗散机械能。通过离散元模型计算出颗粒材质、填充率、尺寸等参数对于单元耗散能量的影响,并进一步探究了颗粒阻尼单元在声激励下的运动规律与能量耗散效果,对于改进水下吸声构件以及提升其吸声效果提供一种参考。
The rapid improvement of modern sonar detection technology have higher demand for high-performance underwater sound adsorption components,especially in low frequency sound range.However,the existing components such as pore structure,particle scattering structure and phononic crystals exhibit unsatisfied effect.To alleviate the problems,we propose a type of underwater sound adsorption component based on particle damping,which can increase mechanical energy loss with collisions of particles,calculate the influences of particle material,filling rate,size and other parameters on the dissipated energy by the discrete element model,and then investigate the motion law and energy dissipation effect of particles under sound stimulation.The underwater sound adsorption component based on particle damping may provide a unique paradigm for underwater acoustic stealth technology.
作者
郑嘉琦
杜佳伟
胡旭
王云明
周华民
ZHENG Jiaqi;DU Jiawei;HU Xu;WANG Yunming;ZHOU Huamin(State Key Laboratory of Material Forming and Mold Technology,College of Materials Science and Engineering,Huazhong University of Science and Technology,Wuhan 430000,China;Wuhan Second Ship Design and Research Institute,Wuhan 430000,China)
出处
《材料开发与应用》
CAS
2023年第4期11-18,共8页
Development and Application of Materials
基金
国家自然科学基金面上项目(52075196)。
关键词
水下吸声构件
颗粒阻尼
声隐身技术
机械能耗散
underwater sound adsorption components
particle damping
acoustic stealth technology
mechanical energy loss
