Among the numerous problems that must be addressed in the design and analysis the fl ight phases of crewed spacecraft , one of the
most important is ensuring the safe stay of astronauts in the command module during the fi nal phase, namely the period between
splashdown and crew evacuation. During this time, the command module is exposed to wave loads and other marine environmental
factors that directly aff ect the comfort and safety of the crew.
Th e article presents the results of numerical calculations of the command module’s motion on the sea surface, as well as an
analysis of the obtained kinematic and dynamic parameters. For the calculations, averaged environmental characteristics typical
of the Atlantic Ocean region east of the Florida Peninsula and north of the Bahamas were used. It is shown that the Ansys AQWA
soft ware package is appropriate for analytical studies of command module motion, as it allows obtaining suffi ciently accurate
results describing the motion of a spacecraft command module on the sea surface.
In the study, the motion parameters of the command modules of crewed spacecraft developed by the Yuzhnoye Design Offi ce
were calculated and compared with those of the American crewed spacecraft Apollo and Orion. Th e results of these calculations
demonstrated that the motion parameters of command modules of crewed spacecraft that use splashdown techniques for Earth return
depend on their design features and can be minimized during the design process. Th e article shows that the motion parameters
of the designed command module are generally within acceptable range of values, confi rming the feasibility of the selected design
solutions and their potential for further practical application.