C.Aquilini, D.Parisse
DOI Number: N/A
Conference Number: IFASD-2017-005
Random loads are of greatest concern during the design phase of new aircraft. They
can either result from a stationary Gaussian process, such as continuous turbulence, or from a
random process, such as buffet. Buffet phenomena are especially relevant for fighters flying in
the transonic regime at high angles of attack or when the turbulent, separated air flow induces
fluctuating pressures on structures like wing surfaces, horizontal tail planes, vertical tail planes,
airbrakes, flaps or landing gear doors.
In this paper a method is presented for predicting n-dimensional combined loads in the presence
of massively separated flows. This method can be used both early in the design process, when
only numerical data are available, and later, when test data measurements have been performed.
Moreover, the two-dimensional load envelope for combined load cases and its discretization,
which are well documented in the literature, are generalized to n dimensions, n ≥ 3.