Ground vehicles and aircraft during ground manoeuvers receive dynamic excitation from an uneven track. The vibration environment causes fatigue in the vehicle structure, discomfort to passengers and crews, undesirable movement and damage to the cargo and wear and tear to the track. Aircraft landing touch-down induces an impact force on the vehicle structure as well as runway which may be significant for the design of some structural components and the track. In the present paper, a procedure for the analysis of coupled vehicle-track dynamics with elastic appendages has been presented, utilizing a recently proposed approach of analysis for variable section beams. The vehicle considered is an aircraft in ground runs with flexible wings that carry concentrated mass loadings and distributed damping. The aircraft is modelled as a combination of lumped and continuous members with the wings idealised as variable section beams. The track is treated as a beam resting on an elastic subgrade. Suspension behaviour is assumed to be linear and the track unevenness a non-homogeneous random process. Closed form expressions for second order response statistics have been developed for a general decription of vehicle forward motion.
Non-stationary response of a variable section flexible wing aircraft over uneven elastic track
Das instationäre Verhalten einer variablen Sektion eines flexiblen Tragflügels bei Flugzeugbewegungen auf einem unebenen elastischen Rollfeld
Journal of Sound and Vibration ; 210 , 1 ; 117-135
1998
19 Seiten, 7 Bilder, 15 Quellen
Aufsatz (Zeitschrift)
Englisch