Taking the 52 m bulk cement ship as a research focus, the finite element analysis software is
used to analyze the local strength of a ship’s tank supporting structure. Under the condition
that the local strength does not meet the specification requirements, three improvement
schemes are proposed: changing the thickness of supporting structural transvers plate,
increasing vertical stiffeners for supporting structure and changing the properties of the
structure plate. On the basis of calculating and verifying that the calculated values of the
stresses all meet the requirements of the specification, the fuzzy comprehensive evaluation
theory is used for comparing and analyzing the three improved schemes. By determining the
factor set of the evaluation objects, the weight vector of the evaluation factors, and the
evaluation objects’ comment set as well as quantitative indicator processing, secondary fuzzy
evaluation and first-level fuzzy evaluation etc., the scheme Ⅲ is determined to be the
optimal reinforcement one.