Identification and quantitative evaluation of micro-crack in deep-sea pressure-resistant structures
At present,the safety research of pressure hull mainly focuses on the material performance constitutive mod-el and the structural parameter evaluation model aiming at fatigue life prediction.The research on damage identification and quantitative evaluation methods of pressure hull is not studied yet.Based on electromagnetic induction and eddy current thermal effect,the relationship between transient temperature response and crack damage in deep-sea ballast tanks is re-searched in this paper,especially the micro-crack damage in deep-sea manned submersibles,which is of great concern dur-ing the service of three deep-sea manned submersibles,so as to realize the quantitative study of micro-cracks in key parts of ballast tanks.The research results of this paper will fill the gap of non-damage monitoring in ballast tank service safety re-search,original methods and theoretical basis for deep-sea ballast micro-crack damage identification is provided,and the op-erational safety of deep-sea submersible currently is guaranteed in service.
deep-sea manned submersiblepressure-resistant structuremicro-crack damagetransient temperature response
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