A comparison of stress analysis and limit analysis approaches for single and multiple nozzle combinations in cylindrical pressure vessels

The finite element method is the most commonly used approach when solving complex practical cylinder-cylinder junctions in pressure vessels. This geometrical arrangement out with permitted scope of design-by-rule approaches or detailed stress information required as a fatigue assessment. High-stress concentrations occur on crotch corner for joints, and it possible to reach solutions this problem by using both theoretical numerical solutions. However, those do not fully overlap nor have same underlying assumptions. As such, an innovative high-fidelity model has been developed provide holistic unified which can tackle wide range problems. In study, various nozzle design challenges were investigated including single multiple combinations, nozzle-cylinder systems different size ratios, fillet weld applications, limit loads external loading cases analyzed. results obtained are compared well-respected calculation methods such WRC537, new presented analysis combinations.