An analytical method has been derived for determining bendingmoment distribution in rings of arbitrary shape under internal pressure loads, with the change of geometric shapes caused by the load being considered. For the purpose of clarity, the method developed vas applied only to double-symmetrical shapes. A differential-integral equation has been derived for this purpose and its solution obtained in the form of a trigonometric series.nCharts have been provided for two specific families of rings of various proportions and flexibilities. Tests conducted on rings of both families agree very well with the analytical calculations. For rings belonging to or close to these families, the bending-moment distributions and the deflections of the ring can be read directly from the curves. For rings of entirely different shapes, an average of 20 hours is necessary for the complete solution of the problem. Examples have been given to show the method of obtaining the curves.
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