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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能准确描述实验数据。
A mathematical model describing the dynamic damping of temperature-frequency-amplitude of a novel BTG plastic alloy was established. The experimental data of dynamic damping loss factor of frequency scanning, temperature scanning and amplitude scanning of BTG plastic alloy were obtained by dynamic thermal analyzer DMA242. By analyzing the experimental data, the temperature-swept damping loss factor is separated into two components related only to the frequency and related to the frequency and the temperature, and the two are respectively expressed by the damping loss factor model and the Gaussian function model of Kelvin fractional derivative Based on this, considering the influence of amplitude on damping loss, a mathematical model of damping loss considering temperature-frequency-amplitude is established. The results show that the established mathematical model of damping loss considering the temperature-frequency-amplitude can accurately describe the experimental data.