Optimal design of typical joints of double bottom hull based on fatigue strength
Structural fatigue failure is one of the main failure modes of ships and marine structures,and the fatigue strength problem is particularly prominent for some structural forms of double-bottom hull.Therefore,a large bulk carrier is selected as the research object.According to the finite calculation results of the whole ship and a large number of literature surveys,the fatigue damage location is determined.The scale model test is designed and carried out for the typical joints and optimized joints in the transition zone of the double-bottom hull.The comprehensive test and finite element calculation res-ults verify the reliability of fatigue test and optimization method,and the fatigue strength of the joint model is evaluated by using D curve and CCS"Guidelines for fatigue strength of ship structure".Combined with the fatigue test results,it further shows that the optimization scheme has certain reference significance for the structural design of similar joints in the double-bottom hull.
double bottom hulltypical jointsfatigue strengthfatigue test
NETL
NSTL
万方数据
