Catastrophic Failure Assessment of Sealed Cabin for Ultra large Manned Spacecraft in M/OD Environment

Hypervelocity impacts of Micrometeoroid and Orbital Debris (M/OD) may lead to catastrophic failure of long-term flight manned spacecraft in orbit. Risk assessment for manned spacecraft in M/OD environment is of great significance for the safety of human space missions. For typical catastrophic failure modes of manned spacecraft such as gas-leakage-induced astronaut hypoxia, sealed cabin fracture, and spacecraft breakup, catastrophic failure assessment method using critical perforation diameters and critical crack lengths of sealed cabins and critical fragment size of spacecraft breakup as failure criteria are proposed. In addition, corresponding modules of catastrophic failure assessment were developed and integrated with Meteoroid and Orbital Debris Assessment and Optimization System Tools, providing an effective assessment tool for researching on the safety of manned spacecraft. On the basis of which, catastrophic failure evaluation of sealed cabin for a specific ultralarge manned spacecraft in the M/OD environment was conducted, providing references for on-orbit mission safety evaluation.