Vibration of varying thickness circular cylinders under uniform external water pressure

The paper presents two theoretical and two experimental investigations into the vibration of three varying thickness thin-walled steel circular cylind ers, One of the investigations was in air and the other was while the vesse ls were subjected to various values of external water pressure, The theoret ical analyses were carried out using the finite element method for both of the theoretical investigations. In the case of the theoretical underwater v ibration investigation, the water motion was also mathematically meddled us ing the finite element method, Comparison between experiment and theory was excellent for the in-air investigation and very good for the in-water inve stigation. (C) 1999 Civil-Comp Ltd and Elsevier Science Ltd. All rights res erved.