Design method of I-shaped longitudinal beam capable of bearing uniformly distributed load

The invention belongs to the field of aviation structure strength design, and particularly relates to a design method of an I-shaped longitudinal beam capable of bearing uniformly distributed loads. Comprising the following steps: calculating uniformly distributed load borne by a longitudinal beam; calculating shearing force and bending moment of the section of the longitudinal beam according to the uniformly distributed load borne by the longitudinal beam; calculating the position of a neutral layer of the longitudinal beam; calculating the bending inertia moment of the section of the longitudinal beam; calculating the maximum axial tensile stress of the edge strip of the longitudinal beam bearing tension and the axial compression stress of the edge strip of the longitudinal beam bearing compression; calculating the areas of the upper and lower edge strips of the longitudinal beam according to the maximum axial tensile stress and axial compression stress of the edge strips; and calculating the thickness of t