Civil Engineering Reference
In-Depth Information
Fig. 14.12
Load-time function of the Phantom, mass 20 t, v
ΒΌ
215 m/s. Comparison calculation
and idealized function according to RSK-LL
14.4.1 Load Approach for a Long-Range Aircraft of the Type
Boeing 747
Based on the explanations of the previous chapter the analysis of a passenger
aircraft of the type Boeing 747 is shown as an example. To create a realistic
mathematical model a considerable amount of information about the layout of the
particular aircraft is needed. This information is partially available in subject-
specific publications. Additional specifications were made available in extracts by
the manufacturers and airline companies due to growing demands after the attacks
on September 11, 2011. In order to make use of the mathematical models that are
based on the approach presented by Riera the compilation of the masses for
individual structural and machine components, such as the landing gear and the
engines, for permitted payload in the cargo compartment and the cabin and for the
aviation fuel distribution over the individual tanks as well as information on
the bursting load of the load-bearing fuselage structure are important.
A further important source of information to aid the development of a mathe-
matical model was discovered by the author by chance. Lufthansa donated a
discharged but still functioning Boeing 747 to the technical museum in Speyer
(town in Germany) for the purposes of exhibition. This aircraft was flown to the
regional airport Baden-Airpark close to Karlsruhe and then partially disassembled
so that it could be transported on the Rhine to Speyer. As a result it was possible to
follow the disassembly over the course of several weeks and to collect additional
information on the design of the aircraft with respect to the necessary data on the
mass and rigidity distributions. Extracts of the collected information are presented
below.
Figure
14.13
shows the fuselage of the Boeing 747 before and after the disas-
sembly of the wings. This illustrates how large this type of aircraft truly is.
