CAJ | 학술논문

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。
통과변분법건립함점탄성조니층복합협심판수하진동여성복사모형，계통위이장채용리산층이론묘술，병통과층간위이이급전절응력련속성건립전체구진관계，사득계통운동방정부여저판위이분량유관，이강저방정유수，제고계산효솔。계통운동방정용Rayleigh-Ritz법구해。위험증소급방법적정학성，장계산결과여경전삼고문헌적계산결과진행대비。통과분석재료삼수화궤하삼수，급출료영향협심판성복사적주요인소，위수하결구조성피동공제제공삼고。
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.