Figure 3.9. Calculated cases of loads on the ring with guides (Soyuz APDA). 1. cross section of ring. When there are loads before linkage, deformation should not prevent the alignment of the rings. Deformations in the two latter cases should not lead to disengagement of the latches. The largest tension in the ring arises during release and coupling. The bending momentum in the longitudinal cross section of the ring from the effect of radial components of the force on the latches is where is the average radius of the ring, and are the angular coordinates which define the point of application of force for the given cross section. For a symmetrical load the maximum bending momentum acting on the point of application of force is .
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