Dynamic response analysis of tube array in partially filled calandria

An efficient procedure is presented for dynamic response analysis of horizo ntal tube array in partially filled calandria including hydrodynamic intera ction effects. The procedure is general enough to consider the transfer of energy between the fluid-coupled tubes, and effects of moderator sloshing o n the magnitude and the distribution of hydrodynamic forces. It has been de monstrated that the conventional added mass approach fails to represent beh aviour of the tube array correctly, and it is therefore necessary to consid er the flexibility of all the tubes along two directions simultaneously. Th e procedure presented can simulate the added damping effects due to hydrody namic interaction. The possible use of a tuned damper tube is suggested for controlling sloshing effects for tube array in a calandria where tube freq uencies and sloshing frequencies are closely spaced. The presence of surfac e damping in the tuned tube further brings down the response, and the sugge sted procedure can be effectively used to control unwarranted sloshing effe cts. Copyright (C) 1999 John Wiley & Sons, Ltd.