新型BTG塑料合金关于温度-频率-振幅的动态阻尼性能模型

摘要

建立了描述一种新型BTG塑料合金的温度-频率-振幅的动态阻尼性能数学模型。通过动态热分析仪DMA242,获取了BTG塑料合金的频率扫描、温度扫描和幅值扫描的动态阻尼损耗因子实验数据。通过分析实验数据,将温度扫描的阻尼损耗因子量分离为仅与频率相关以及与频率、温度均相关的两个分量,并分别用Kelvin分数导数的阻尼损耗因子模型和高斯函数模型来表达这两个分量,再以此为基准,考虑振幅对阻尼损耗的影响,由此建立了综合考虑温度-频率-振幅的阻尼损耗数学模型。结果表明,所建立的综合考虑温度-频率-振幅的阻尼损耗数学模型%A mathematical model is constructed to describe the dynamic damping performance for a new type of BTG plastic alloy about the temperature-frequency-amplitude.The experimental data of dynamic damping loss factor of BTG plastic alloy were obtained through test of frequency sweep,temperature sweep and amplitude sweep in the dynamic thermal analyzer DMA242.Through the analysis of the experimental data,the amount of damping loss factor is separated 2 components,namely,the amount related only to the frequency and the amount related to both the frequency and temperature.The amount related only to the frequency is described by Kelvin model of fractional derivative and the amount related to both the frequency and temperature is described by Gaussian function.A comprehensive model considering of the temperature-frequency-amplitude is established reference to the above model plus the amplitude factor.The results show that the comprehensive model can accurately describe the experimental data.