分数导数三参数标准固体黏弹性材料的耗散性能

The Dissipative Properties of Fractional Derivative Three-Parameter Viscoelastic Standard Solid Model

  • 摘要: 对分数导数三参数黏弹固体性材料的耗散性能进行了研究.基于黏弹性理论和分数阶导数理论,建立了分数导数黏弹性三参数标准固体模型,得到了分数导数黏弹性三参数固体模型的复柔量,并在此基础上得到了其耗损比和内摩擦角,以数值算例的形式分析了耗损比和内摩擦角随频率的变化规律.结果表明:在低频下的材料接近弹性材料;相反,在高频下,在每个周期有一个微小的耗散,并且趋近于一个有限值.频率越高,三参数固体的内耗频谱峰值所对应的横坐标值越接近1.

     

    Abstract: The dissipative properties of fractional derivative three-parameter standard solid model were investigated. Fractional derivative three-parameter viscoelastic standard solid model was established base on the viscoelastic theory and the theory of fractional derivative, the compliance of fractional derivative three-parameter viscoelastic solid model was calculated, then its loss ratio and angle of internal friction angel were worked out. Finally, in the form of numerical calculation, the changing characteristics of loss ratio and internal friction's angle with the frequency were analyzed. The results showed that the materials were close to the elastic material under low frequency. On the contrary, the materials have a tiny dissipation in each cycle and tend to a finite value under high frequency. The abscissa value of three-parameter solid's peak internal friction approximates to one with higher frequency.

     

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