Research on fatigue test of manned capsule model of submersible
As the most critical component of full ocean depth submersible,the spherical shell of manned capsule needs to withstand alternating sea pressure in the process of submersible diving and floating,which is a great test for the long-term safety of the structure.In order to assess the fatigue performance of the manned capsule of deep-sea manned submersible,this paper carried out a fatigue test study on the shrinkage model of the titanium alloy capsule of the manned capsule with an inner diameter of 800mm for the first time,and analyzed the effects of fatigue load on the shape of the capsule,residual stress of the weld,structural stress of key parts,and defect initiation and expansion.The experimental basis is provided for the evaluation of fatigue performance and structural safety of manned capsule shell of deep-sea manned submersible.
full ocean depth submersibletitanium alloyspherical shellfatigue test
NETL
NSTL
万方数据
