关键词: 换热器管束,    , 流体激振,    ,  随机碰撞,   ,  有限元法

Abstract: When the vibration of heat exchanger tube bundle is large induced by fluid, the collisions between the tube and baffle will take place at the maximum amplitude of the tube, which leads to tube fretting wear and damage. The transient finite element analysis of fluidinduced vibration response for a heat exchanger tube was employed with ANSYS software. On this basis, the phenomenon of random rubbing between the bezel and tube was studied due to the larger vibration amplitudes of the tube. The nonlinear dynamic response and vibration rules of the random collisions between the bezel and tube were calculated. The calculated results provide a theory of reference for the design of heat exchanger tube bundles.

Key words: Tube bundle of heat exchanger,    , Flowinduced vibration,   ,  Random collisions,   , Finite element model