Construction mechanics of the load bearing structure of the cosmonaut landing and evacuation unit

The analysis of emergency situations is a determining factor for all safety work, and its results largely determine the subsequent technical solutions in the development of emergency rescue equipment. When analyzing emergency situations, experts consider their distribution by location (by on-board and ground systems) and by the time of occurrence, determine the causes and probability of their occurrence, the nature of their development by time, as well as consequences and significance for the subsequent flight. It is necessary to highlight situations caused by on-board system failures among the emergency situations, the occurrence probability of which is the highest. Such emergencies, as a rule, are subject to the most thorough analysis. As the results of flight tests of rocket and space equipment show, failures are distributed unevenly across the systems: the greatest probability of failures is in on-board launch vehicle systems, less - in PTK systems, and even less - in ground systems. This is due to the fact that on-board PTK systems operate mainly in the standby (less stressful compared to the working) mode at the launch site, and it is much easier to ensure high reliability and timely monitoring in ground systems. In the article, a model of an upgraded cosmonaut landing and evacuation unit for the Soyuz-5 launch vehicle with the PTK Orel, which is designed on the basis of the existing CLEU (unit 11T187) for the Zenit launch vehicle at the Baikonur Cosmodrome, is designed and analyzed for strength. English version of the article is available at URL: https://panor.ru/articles/structural-mechanics-of-the-supporting-structure-of-the-astronaut-landing-and-evacuation-unit/78209.html