The invention provides a method for determining buckling load-end shrinkage curves of
deck longitudinal beam columns supported by
cantilever crossbeams, and belongs to the technical field of ship
structural engineering. The method for determining buckling load-end shrinkage curves of
deck longitudinal beam columns supported by
cantilever crossbeams comprises the following steps of: 1, establishing a
deck longitudinal
beam column instability mechanical model after large-scale
impact; 2, establishing a
cantilever crossbeam
mechanical equation and obtaining a lowest-order frequency formula; 3, establishing a cantilever crossbeam
torsional rigidity calculation model and determining a
torsional rigidity; 4, determining a support rigidity, for a deck longitudinal beam, of a crossbeam; 5, determining a longitudinal
beam column buckling curve and a buckling
critical load; and 6, determining a
critical load-end shrinkage curve of the longitudinal
beam column. The method provided by the invention is a theoretical method for rapidly obtaining the buckling load-end shrinkage curves of longitudinal beam columns supported by cantilever crossbeams after large-scale
impact damage, so that the calculation is improved; and compared with a nonlinear
finite element method, the method has the advantages of shortening the calculation time and improving the efficiency.