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Monday, July 8 • 16:30 - 16:50
VIBRATION CHARACTERISTICS OF A BEAM BEARING HIGH ACCELERATIONS AND JERKS IN A TRIAXIAL CENTRIFUGE

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The load of the rapid maneuver aircraft is characterized by high accelerations, high jerks and multiple directions in space. The ground load simulation test of the aircraft is usually carried out on a triaxial centrifuge. In this paper, considering the three-axis centrifugal motion and elastic vibration of the beam, velocity and acceleration model of the beam are established by the method of motion synthesis and matrix rotation. The acceleration model of the beam is the basis of the load analysis and calculation of the dynamic responses. Dynamic equations of the beam in the three-axis centrifugal environment is established. Based on the dynamic equations, responses of the beam is calculated at the cases of different motion parameters. The influence of the accelerations and jerks on the responses is analyzed. The results show that both the accelerations and jerks can result deformation on the beam. Jerks can cause vibration of the beam and a sudden change of acceleration will induce a significant vibration of the beam. For the beam, a sudden change of acceleration just likes an impact force loading on the beam. The mechanical model and calculation method obtained in his paper can be used to simulate the flight responses of the aircraft with high accelerations and jerks.

Moderators
EP

Elsa Piollet

Dr, Polytechnique Montréal
avatar for Mohammad Rafiee

Mohammad Rafiee

Postdoctoral Fellow, Polytechnique Montréal
Mohammad Rafiee received his Ph.D. degree in Mechanical Engineering from the University of Ottawa in 2018. Currently, he is a Postdoctoral Fellow at Polytechnique Montreal in Canada. His research interests are primarily focused on the development of advanced composite materials, smart... Read More →
AR

Annie Ross

Professor, Polytechnique Montreal

Authors

Monday July 8, 2019 16:30 - 16:50 EDT
St-Laurent 8
  T07 Struct. dyn. & nonlin. vib., RS02 Vibr & cntrl of nonlin mech syst

Attendees (4)