Survey on modal frequencies of centrifugally stiffened beams

A. Bazoune
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引用次数: 24

Abstract

This survey is concerned with the problem of determining the dynamic modal characteristics (natural frequencies and associated mode shapes) of rotating beams. Modal characteristics are of paramount importance to the design and performance evaluation of rotating beams, and have been the subject of interest to many investigators. Accurate prediction of the dynamic characteristics of such structures is necessary in the early stages of the design process in order to avoid any possible conditions susceptible to resonance within the range of operating speed, and to prevent any failure that may occur because of sustained vibration at or near the resonant frequency range. While developing beam models, various parameters pertinent to the functional requirements were added in order to cope with aerodynamic issues as well as technical and economical issues. With all parameters present in the model, solving the problem becomes extremely complicated. An exact solution is almost impossible. Many simplified mathematical models with a variety of geometries and properties have been developed in the literature to investigate the dynamic characteristics of such rotating beams using a variety of methods.
离心加筋梁模态频率的研究
这一调查涉及的问题是确定的动态模态特性(固有频率和相关模态振型)的旋转梁。模态特性对旋转梁的设计和性能评价至关重要,是许多研究人员感兴趣的课题。为了避免在运行速度范围内出现任何可能发生共振的情况,为了防止在谐振频率范围内或附近发生持续振动而可能发生的故障,在设计过程的早期阶段就必须对这类结构的动态特性进行准确的预测。在开发梁模型时,为了应对气动问题以及技术和经济问题,需要添加与功能要求相关的各种参数。由于模型中存在所有参数,求解问题变得极其复杂。精确的解几乎是不可能的。文献中已经发展了许多具有各种几何形状和性质的简化数学模型,使用各种方法来研究这种旋转梁的动态特性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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