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Estimation of the equivalent complex modulus of laminated glass beams and its application to sound transmission loss prediction

机译：夹层玻璃梁的等效复数模量估计及其在声传输损耗预测中的应用

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摘要

The complex modulus E(jω) characterizes the visco-elastic behavior of a material. Using a system identification approach, this modulus can be measured via broadband modal analysis experiments. The technique is applied to determine the equivalent complex modulus E(jω), with its uncertainty bound, of multilayer glass beams from transversal vibration experiments in free-free boundary conditions. This property is related to the effective complex bending stiffness of the laminated glass specimen, and is further used for predicting the sound transmission loss of a multilayer plate. The data are rationalized in the terms of the linear visco-elastic properties of the polymer interlayer.
机译：复数模量E（jω）表征了材料的粘弹行为。使用系统识别方法，可以通过宽带模态分析实验来测量该模量。该技术可用于在自由边界条件下通过横向振动实验确定多层玻璃梁的等效复数模量E（jω）及其不确定性范围。该性质与夹层玻璃试样的有效复弯曲刚度有关，并且还用于预测多层板的传声损失。数据根据聚合物夹层的线性粘弹性质进行了合理化。

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