Civil Engineering Reference
In-Depth Information
Fig. 14.13
The Boeing 747 during disassembly (with and without wings)
The important elements of the fuselage of the aircraft are the outer shell, the
longitudinal beams, the pilasters and the cross bracings, so-called structural ribs.
The cabin floor consists of a lightweight girder grill construction with panelling. In
the mathematical models the theoretical maximum of the mass of the cabin and the
cargo compartment are reduced and assumed to be distributed over the length of the
aircraft. In this regard it is important to account for the fact that the Boeing 747 uses
a double deck configuration at the front of the airplane. The front section up to
about the middle of the wings must therefore be more strongly weighted. Regarding
the fuselage the additional cabin floor and the slightly larger cross-section have to
be considered, with respect to the mass of the cabin the increased live load due to
the second deck. The mass of fuselage increases slightly towards the rear part due
to the horizontal and vertical tail and the additional rear turbine.
The masses of the two cargo compartments can be conservatively assumed to be
approx. 80 % of their maximum live load. Directly under the cargo compartment
