【摘要】 管系或传热管的流致振动分析中流弹性失稳激励是非常重要的一种机理。在工程界和学术界对于流弹性失稳激励机理的认识存在一定的争议。本文通过三个案例分析表明:流弹性失稳实际上是其他两种共振激励机理的延伸,与其他两种共振激励最主要的区别在于它是一种流固强耦合条件下由于振动不稳定带来共振振幅的发散。本文还解释了有关流弹性失稳激励机理中容易产生的混淆问题。更多还原

【Abstract】 As we all know, the flow elastic instability excitation is a very important mechanism in the flow-induced vibration analysis of pipe systems or heat transfer tubes, but there is still some controversy in the engineering and academic circles about the flow elastic instability excitation mechanism.The analysis of three cases shows that fluid elastic instability is actually an extension of the other two resonance excitation mechanisms, but the main difference is that it is a divergence of resonance amplitude due to instability of vibration in a fluid-solid coupling condition. Analyze the confusion problems that are easy to produce in the excitation mechanism of flow elastic instability.更多还原