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首页> 外文期刊>Journal of the Chinese Society of Mechanical Engineers, Series C: Transactions of the Chinese Society of Mechanical Engineers >Identification of a significantly non-proportionally damped structure using force appropriation
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Identification of a significantly non-proportionally damped structure using force appropriation

机译：使用力分配识别显着非比例阻尼的结构

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摘要

Dynamic tests were carried out on an aluminium plate with significant non-proportional damping applied via two oil filled dampers. Normal mode force appropriation (phase resonance) methods were used to measure the undamped normal modes of the plate and the results compared with corresponding complex modes obtained using a standard curve fitting (phase separation) approach. It is demonstrated that, as long as suitable excitation p0sitions are chosen, high quality undamped normal modes can he identified while the curve fitted modes are highly complex. A Finite Element analysis of the plate was used to show how the results of normal mode force appropriation are directly comparable, particularly when damping is non-proportional.
机译：在铝板上进行了动态测试，并通过两个注油阻尼器施加了显着的非比例阻尼。使用法线模式力分配（相位共振）方法来测量板的无阻尼法线模式，并将结果与​​使用标准曲线拟合（相分离）方法获得的相应复数模式进行比较。结果表明，只要选择合适的激励位置，就可以识别出高质量的无阻尼法线模式，而曲线拟合模式则非常复杂。板的有限元分析用于显示法向力分配的结果如何直接可比，尤其是在阻尼不成比例的情况下。

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