Civil Engineering Reference
In-Depth Information
Fig. 14.18
Schematic representation of the total mass distribution along the longitudinal aircraft
axis for a Boeing 747
Jet engine
Jet engine
Wing masses
Fuselage masses
Fig. 14.19
Computational model for a Boeing 747 impacting on a rigid straight target
To determine an impact load-time function the two-dimensional mathematical
model presented in Sect.
14.2
can be used among others in conjunction with the
gathered data for a Boeing 747. Figure
14.19
shows a top view of the spring-mass
system. A straight rigid target is located on the left side. Upon impact of the
respective components of the aircraft structure they are deaccelerated due to the
contact springs. A speed of 175 m/s is assigned to all masses as an initial condition.
During the impact initially only the fuselage hits the target and is compressed.
Subsequently the wing sections are included in the process and make contact with
