Example 9, Slide 5: Propellant tank BIGBOSOR4 segments and aft and forward tapered double plus ring reinforcement

Fig. 1b from the 2013 GENOPT paper1. BIGBOSOR4 model of the propellant tank. This tank model contains 28 shell segments. The points shown in the leftmost image lie on the shell reference surface. These points indicate only the end points of each shell segment in the model. Each shell segment contains many nodal points, as follows: 13 nodal points in each of Segments 1 – 13 and 16 – 28, and 53 nodal points in Segments 14 and 15 (the two long cylindrical segments of the propellant tanks). Red arrows indicate the direction of increasing arc length along the meridian of the tank. Images on the right-hand side: details of the forward and aft reinforcements where the struts are attached to the centroids of the forward and aft external propellant tank support rings.

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