Abstract
The vibration response of a heat exchanger lube row subject to cross flow is studied. The FE-code ADINA is employed and the fluid forces acting on the tubes are modelled by user-supplied load routines. The fluid forces depend on the current state of motion as well as on the flow velocity and the fluid density. Stability limits are found where the tube displacements are growing monotonically. Nonlinear fluid forces could be easily implemented as well as other nonlincaritics such as gaps between tubes and baffles etc. The model looks promising as it shows good agreement with earlier published results. Future developments are outlined.
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