频率和损耗因子是粘弹性材料复合夹层结构的两个重要的动力特性指标。
Frequency and loss factor are two important indices of dynamic property of composite structures, in which the viscoelastic material is sandwiched between the upper layer and the lower layer.
加入聚苯硫醚（PPS）的PTFE基复合材料的损耗因子曲线只出现一个明显的峰，峰值变大；
The loss factor curve of PTFE/PPS appears only one peak, and the loss peak value increases.
层压减振复合钢板的结构损耗因子的试验值高于计算值，但二者随温度的变化规律具有很好的一致性。
The loss factor of the laminated steel sheet is of larger testing value than the calculating value, but their dependence on temperature is in good accordance with each other.
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