CAJ | 학술논문

以单层金属薄铝板为研究对象，建立板的三维模型，用Virtual Lab/Acoustic以直接有限元法进行铝板的声振耦合计算，分析金属铝板隔声量频率特性曲线，然后与实验测量数据进行对比分析。特别针对数值模拟计算中模型的几何尺寸和边界条件对板的隔声量频率特性曲线的影响进行了对比分析。研究结果发现，数值计算能够有效地进行金属板的隔声量特性曲线预测，模型的几何尺寸和边界条件在低频条件下对薄板的隔声量有较大的影响。
이단층금속박려판위연구대상，건립판적삼유모형，용Virtual Lab/Acoustic이직접유한원법진행려판적성진우합계산，분석금속려판격성량빈솔특성곡선，연후여실험측량수거진행대비분석。특별침대수치모의계산중모형적궤하척촌화변계조건대판적격성량빈솔특성곡선적영향진행료대비분석。연구결과발현，수치계산능구유효지진행금속판적격성량특성곡선예측，모형적궤하척촌화변계조건재저빈조건하대박판적격성량유교대적영향。
With single layered thin aluminum plate as the study objective, a three-dimensional model is established to study its acoustic vibration cou-pling with Virtual Lab/Acoustics software, analyzed TL frequency feature curve and compare it with data obtained through actual measurement. The im-pacts of model size and boundary condition in numerical modeling calculation on the TL frequency feature curve are compared and analyzed. The study shows that numerical calculation can effectively predict TL frequency feature curve and model size and boundary condition exert great influence on trans-mission loss under low frequency condition.