粘弹性阻尼材料减振性能试验评估方法

为在船体结构声学设计阶段或阻尼材料研制阶段预先评估粘弹性阻尼材料的减振效果，基于锤击法，建立平板振动试验模型，引入频响函数幅值平均衰减量参数，对3型粘弹性阻尼材料复合试样分别在不同频段内的减振效果进行对比分析。结果表明：基于损耗因数和频响函数幅值平均衰减量的粘弹性阻尼材料减振效果试验评估方法能迅速在不同频段对阻尼材料的减振性能进行排序；利用频响函数幅值平均衰减量，可对耗能机理较为复杂的约束阻尼减振效果进行评估，为结构设计或研发阻尼材料提供依据。

Test Assessment Method of Damping Property of Viscoelastic Damping Materials

In order to assess the vibration reduction parameters of viscoelastic damping material prior to the acoustic design phase or the damping material developmental stage, this paper, based on the hammer-ing excitation method,establishes a flat plate test model. By introducing an average attenuation of the am-plitude for the frequency response function,the damping property of 3 types of domestic viscoelastic damp-ing materials is analyzed in different frequency bands. The results show that the proposed method based on the loss factor and average amplitude attenuation of frequency response function can quickly sort the vibra-tion damping properties of the material in different frequency bands. Moreover, using the average attenua-tion of the amplitude of frequency response function can effectively assesses the effects of the constrained damping whose energy loss mechanism is more complex,which serves as the basis for the structural design or damping materials R＆D.