粘弹性阻尼夹芯板水下声辐射数值计算

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振动与冲击 ›› 2014, Vol. 33 ›› Issue (19) : 206-210.

论文

粘弹性阻尼夹芯板水下声辐射数值计算

胡昊灏 1,2 ，商德江 1,2

作者信息 +

Numerical calculation of underwater sound radiation for sandwich plates with viscoelastic damp core

Hu Hao-hao 1,2 Shang De-jiang 1,2

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文章历史 +

摘要

通过变分法建立含粘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。

Abstract

The vibration and sound radiation of underwater composite sandwich plate with visco-elastic core was established by variational method , the displacement field was described by discrete layers theory, the continuity of shear stresses and displacements at each interface was enforced to form transfer matrix which makes the system equations connect only the displacement components of the bottom plate, thereby reducing the dimensions of the equation and improving the computing efficiency, then the motion equation was solved by Rayleigh-Ritz method. To verify the proposed method, the calculation result was compared with the classical reference. The material and geometric parameters were concerned, and the main influence factors for acoustic radiation were obtained, which provide references for passive noise control of underwater structures

导出引用

胡昊灏;;商德江;. 粘弹性阻尼夹芯板水下声辐射数值计算[J]. 振动与冲击, 2014, 33(19): 206-210

Hu Hao-hao; Shang De-jiang;. Numerical calculation of underwater sound radiation for sandwich plates with viscoelastic damp core [J]. Journal of Vibration and Shock, 2014, 33(19): 206-210