In order to investigate the long-term structural safety of the manned capsule shell of deep-sea manned submersible under the action of alternating seawater pressure,two titanium alloy shrinkage spherical shells are designed to carry out fatigue test in a deep-sea environment simulator.In order to reduce the damage to the deep-sea environment simulation device and effectively shorten the test time,a dual-ball parallel fatigue test technology using the internal and external pressure difference method in ultra-high pressure deep-sea environment is proposed in the paper,and the loading and unloading test of nearly 7000 cycles is carried out accordingly.The results show that the test technology is long-term effective and reliable,which can provide technical basis and application reference for the same type of tests.
关键词
载人舱/钛合金/球壳/疲劳试验
Key words
manned capsule/titanium alloy/spherical shell/fatigue test
维普
万方数据