Abstract:The exhaust pipe of launch vehicle storage tank in pressurization feed system mainly works for satisfying bleeding in testing phase and exhausting in launching readiness phase. The destruction of the exhaust pipe may lead to the accumulation of propellant in the tank and in an enclosed environment, which can cause a rocket to explode in serious cases. This paper introduces the fault phenomenon occurred after filling which is caused by the destruction of the bellows of exhaust pipe, to verify the effect of multi-factor deformation through the simulation analysis by building a load-bearing model. The result of analysis indicates that the cause of breakage is the fatigue when bellows assembly undergoing alternating loads in the case of limiting deformation. At last, the effectiveness of simulation analysis was verified by a 1:1 ground test. At the same time, the ground test will strongly support the subsequent force analysis of exhaust pipe for the rocket during its flight.