Experimental investigation of the dissipation characteristic of sandwich structures with periodically perforated viscoelastic damping material core
Experimental investigation of the dissipation characteristic of sandwich structures with periodically perforated viscoelastic damping material core
复制标题
周期性穿孔粘弹性阻尼材料夹芯结构耗散特性实验研究
DOI：
10.1177/1077546319844545
复制
发表时间：
2019-04
影响因子：
2.8
通讯作者：
Zhang C. Y.
中科院分区：
文献类型：
--
作者：
Zhou X. Q.;Wang L.;Yu D. Y.;Zhang C. Y.
波能在粘弹性阻尼材料（VDM）复合结构中传播时具有逐渐耗散的特性。本文在制备不同开孔率的VDM层试件后，采用实验方法研究了周期性穿孔VDM芯芯夹层结构的弹性波能传播和耗散特性。在我们的实验中，夹层结构被离散成几个测试点。当传感器获得各测试点的复速度、等效有效质量和外激振力后，根据波在固体中传播的能量耗散机制确定夹层结构中的能量耗散。并将实验结果与理论和数值模拟结果进行了比较。利用实验数据对理论和数值结果的计算精度进行了分析，结果表明，理论、数值和实验结果具有较高的一致性，特别是在中频和高频范围内。因此，我们的实验结果表明，周期性穿孔VDM夹层结构在中频和高频范围内具有良好的耗散特性，可以应用于工程实践。
Wave energy can be dissipated gradually when it is propagated in viscoelastic damping material (VDM) composite structures. In this paper, after the specimens with different opening ratios (ORs) of VDM layer are prepared, the elastic wave energy propagation and dissipation characteristic of periodically perforated VDM cored sandwich structures are investigated by an experimental method. The sandwich structures are discretized into several testing points in our experiment. When the complex velocity, equivalent effective mass, and external excitation forces have been obtained at each testing point by sensors, the energy dissipation in the sandwich structure is determined based on the energy dissipation mechanism of wave transmission in solid. The experimental results are then compared with theoretical and numerical simulation results. By analyzing the computational accuracy of theoretical and numerical results using experimental data, it is shown that high consistency between theoretical, numerical, and experimental results can be achieved, especially in the medium-frequency and high-frequency ranges. Thus, our experimental results demonstrate that periodically perforated VDM sandwich structures can be applied to engineering practice for their good performance of dissipation characteristics in the middle-frequency and high-frequency ranges.
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DOI：
10.1016/j.compositesb.2018.11.042
发表时间：
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期刊：
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影响因子：
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