Tripping of thin-walled stiffeners in the axially compressed stiffened panel with lateral pressure and end moment

Tripping of stiffeners under combined loads of axial force, lateral pressure and end moment is studied. First, the neutral balance differential equation under the three combined loads is deduced. The equation is solved with Galerkin's method and a general eigenvalue problem is got. Second, the rotational restraint provided by the plate is studied. Based on the result of FEM, existing formula is modified and comparison of results according to different spring stiffness shows that the modified formula is more reasonable. A program based on the method is developed and its result has a very good coincidence with the result of FEM program MARC. Last, a series of calculation is conducted with above program to study the relation of the three kinds of loads. Regression of the results of the calculation gives out a correlativity formula of the three kinds of loads.