Example $7\mathrm{.}8\mathrm{.}11$ Use the principle of complementary virtual work to find the bending moment distribution in the circular fuselage frame of Figure $7\mathrm{.}8\mathrm{.}34.$ Assume that the flexural rigidity $E{I}_z$ is uniform throughout both the ring and the floor beam, and neglect shear and stretching. The area of all the stringers is $0\mathrm{.}4in.{?}^2$

Figure $7\mathrm{.}8\mathrm{.}34$ Circular frame and floor beam combination.