EXPERIMENTAL AND NUMERICAL STUDY OF THE EFFECT OF STIFFENINGRINGS ON REDUCING THE THICKNESS OF TORISPHERICAL HEADS WITH PRESSURE ON THEIR CONCAVE SIDE*

چکیده مقاله

The high thickness of heads used in pressure vessels is always one of the main concerns of designers and manufacturers. A comprehensive analytical and experimental study has been conducted by the authors on all types of heads including torispherical heads (under external and internal pressure) to come up with a procedure to reduce their thicknesses using stiffening-rings. The result of the experiments and Finite Element Analysis (FEA) on torispherical heads with pressure on their concave side are presented in this paper. A method for determining the dimensions of the most suitable ring and its location on heads as well as its effect on the reduction of head thickness is addressed. The experimental results show good agreement with the analytical calculations and confirm that suitable stiffening-rings, in most cases, could considerably reduce head thicknesses.