Abstract

The assessment of the vibration strength of elastic metal structures for various purposes is carried out on the basis of mathematical modeling. Proper determining the internal friction coefficient of the metal is of key importance, because this value significantly affects the values of the natural frequencies of damped oscillations and is reflected in the conditions of resonances of various orders. In this article, the internal friction coefficient of the AMg6 aluminum alloy is determined by two methods: electromechanical and laser vibrometry. The dependence of the internal friction coefficient on the fundamental frequency of oscillations in the hertz range is established under the assumption that the isochronous condition is met. The results of this study make it possible to clarify the Voigt hypothesis as applied to the AMg6 alloy in the hertz range.

中文翻译：

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AMg6 合金内部摩擦的频率相关性

摘要

各种用途的弹性金属结构的振动强度评估是在数学建模的基础上进行的。正确确定金属的内摩擦系数至关重要，因为该值会显着影响阻尼振荡的固有频率值，并反映在各种阶次的共振条件中。本文采用机电测振法和激光测振法两种方法测定AMg6铝合金的内摩擦系数。在满足等时条件的假设下，建立了内摩擦系数对赫兹范围内振荡基频的依赖性。