Fuzzy Reliability Assessment of Submarine Pipeline Spansunder Vortex Induced Vibration

vortex induced vibration on span is an important factor which result in the submarine pipeline failure.Considering the fuzzy character of both span vibration character and hydrodynamic load,this paper presents a fuzzy complicate assessment model of span fuzzy reliability,which under the action of vortex induced vibration,basis on fuzzy theory,system analysis theory,offshore engineering theory,and reliability theory.