Proceedings of the International scientific and practical conference ― Cambridge Science and Education Conference‖ (February 23-25, 2026) / Publisher website: www.naukainfo.com. – Cambridge, United Kingdom, 2026. - 289 p.

87 Fig. 2. Demonstration of the effect of eccentric stretching In this regard, the concept of the so-called ―leverage factor‖ was introduced into the calculation methodology, which increases the real stresses in the bolted connection. It was calculated that for the considered variants of the joint structures, its value is within 1.1 ’ 1.6 and is determined mainly by the distance (eccentricity) from the axis of the bolts to the middle surface of the tank shell, as well as the magnitude of the external load and the bolt tightening torque. Based on the results of a finite-element numerical experiment, taking into account the eccentricity of the location of the bolts of the flange connection of the compartments to the direction of action of the external load, an additional study was conducted to determine the sensitivity of the calculation results to changes in some input parameters of the bolted connection of the launch vehicle compartments. It was found that: - an increase in the bolt tightening force of up to 30% leads to an increase in the stresses in the joint of the sleeve and the frame by no more than 10%; - an increase in the diameter of the sleeve by 30% leads to a decrease in the maximum stresses in the bolted connection by more than 2 times; - a constructive displacement of the bolt axis towards the tank shell by 20% from the standard location to the middle surface of the shell reduces the stresses in the bolted connection by 40%.