Viscoelastic polymer composites are widely used for vibration control in different fields of engineering like aerospace, mechanical, and structural engineering. The viscoelastic properties of these materials are strain rate-dependent and are highly related to frequency. Yet to date, less attention has been paid to quantifying the effects of these parameters and their interactions on damping properties and providing an approximation method for further applications. In the present research, a series of experimental tests was conducted on a viscoelastic material and the experimental data were numerically analyzed in detail. Sensitivity analyses are usually applied to quantify uncertainty using sampling techniques. However, in this study a method was proposed to derive a closed-form solution using the response surface function and a derivative-based global sensitivity analysis to evaluate the output contribution of each parameter. These effects were quantified and several approximation statistics were provided for future engineering implementations. The computational evaluation conducted in this study gives a detailed insight into the mechanical behavior of viscoelastic materials.

中文翻译：

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高分子复合材料粘弹性的实验和数值敏感性评估。

粘弹性聚合物复合材料广泛用于航空航天，机械和结构工程等不同工程领域的振动控制。这些材料的粘弹性与应变率有关，并且与频率高度相关。迄今为止，对这些参数及其相互作用对阻尼特性的影响进行量化的关注较少，并为进一步的应用提供了一种近似方法。在本研究中，对粘弹性材料进行了一系列实验测试，并对实验数据进行了详细的数值分析。灵敏度分析通常使用采样技术来量化不确定性。然而，在这项研究中，提出了一种使用响应面函数和基于导数的全局灵敏度分析来得出每个参数的输出贡献的闭合形式解的方法。对这些影响进行了量化，并为将来的工程实施提供了一些近似统计数据。在这项研究中进行的计算评估提供了对粘弹性材料的力学行为的详细了解。