Abstract
This paper presents a method to calculate the critical flow velocity of fluidelastic vibration of tube array in the heat exchangers. The method is based upon the modal analysis technique, which combines the fluid dynamic force caused by cross flow and the vibration characteristics of the complicated tube array to obtain its response. The analytical method enables us not only to take into account the vibration mode of tube array and distribution of the flow velocity, but also to estimate the effect of anti-vibration devices such as spacer, connecting band and so on. Based on the numerical results of the fluidelastic vibration mode shape of no constrained tube array, the mode shape constrained devices along the flow direction are offered and its availability are confirmed by the numerical analysis and experimental evaluation.
