摘要
通过变分法建立含黏弹性阻尼层复合夹芯板水下振动与声辐射模型,系统位移场采用离散层理论描述,并通过层间位移以及剪切应力连续性建立传递矩阵关系,使得系统运动方程仅与底板位移分量有关,以降低方程维数,提高计算效率。系统运动方程用Rayleigh-Ritz法求解。为验证所给方法的正确性,将计算结果与经典参考文献的计算结果进行对比。通过分析材料参数和几何参数,给出了影响夹芯板声辐射的主要因素,为水下结构噪声被动控制提供参考。
The vibration and sound radiation model of an underwater composite sandwich plate with visco-elastic core was established with the variational method ,the displacement field was described with the discrete layer theory,the continuity of shear stress and displacements between layers was used to form a transfer matrix so that the system motion equations were related only to the displacement components of the bottom layer,thereby the dimensions of the equations were reduced and the computing efficiency was improved.Then,the motion equations were solved with Rayleigh-Ritz method.To verify the correctness of the proposed method,the calculation results were compared with those in the classical reference.The material and geometric parameters were analyzed,and the main influence factors on the acoustic radiation of the plate were obtained.The results provided a reference for passive noise control of underwater structures.
出处
《振动与冲击》
EI
CSCD
北大核心
2014年第19期206-210,217,共6页
Journal of Vibration and Shock
基金
国家自然科学基金资助项目(11274080)
关键词
夹芯板
离散层
传递矩阵
声辐射
sandwich plate
discrete layers
transfer matrix
sound radiation
