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实际结构的阻尼机理是相当复杂的,本文讨论一般结构的阻尼机理与阻尼效应;介绍几种常用的结构阻尼比的实验确定方法;最后评述它们在实际工程当中的应用。研究表明,运载器(Space vehicle)模态试验时,应当采用多种方法进行实测,然后通过统计分析方法提供阻尼比的下限值,为稳定控制系统提供可靠的模态数据。
The damping mechanism of the actual structure is rather complicated. In this paper, the damping mechanism and damping effect of the general structure are discussed. Several commonly used experimental methods for determining the damping ratio of the structure are introduced. Finally, their applications in practical engineering are reviewed. The research shows that during the modal testing of a space vehicle, a variety of methods should be used to measure it. Then the lower limit of the damping ratio is provided by statistical analysis to provide reliable modal data for the stable control system.