Abstract

A mathematical model of the vibrations of an elastic tube bundle in a crossflow is considered. The model is applicable to predict the reaction of the tube bundle components under the action of the vortex and hydroelastic excitation mechanisms considering the intermediate supports placed with gaps between them and the tube components—the presence of the gaps is a necessary precondition for assembling the structure. The impact of the tubes–intermediate supports is taken into account by the oblique impact model with the normal and tangential components of the reaction force of the supports. The proposed mathematical model was implemented in the Matlab programming environment. The parameters of the induced vibrations of the steam-generator-tube model such as the frequency content and the root-mean-square (rms) values of the vibration-induced displacements and accelerations were calculated. The dependences of the above parameters on the design and operating characteristics were studied.

中文翻译：

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蒸汽发生器管道系统振动参数的计算，以验证振动强度和寿命

摘要

考虑了横流中弹性管束振动的数学模型。考虑到中间支撑件与管件之间留有间隙，该模型可用于预测在涡旋和水弹激励机制作用下管束构件的反应-间隙的存在是组装结构的必要前提。斜管冲击模型考虑了管子与中间支撑物之间的碰撞，其中支撑物反作用力的法向和切向分量均已考虑在内。所提出的数学模型是在Matlab编程环境中实现的。计算了蒸汽发生器管模型的诱发振动的参数，例如振动诱发的位移和加速度的频率含量和均方根（rms）值。研究了以上参数对设计和运行特性的依赖性。