RANDOM VIBRATION ANALYSIS ON INSTALLATION OF AN ENVIRONMENTAL CONTROL SYSTEM COMPONENT IN FIGHTER AIRCRAFT

Kishen Karumbaiah B J, Y J Suresh, Basava T

Abstract: Random vibration analysis is a major requirement to predict safe flight envelopes and to decide random vibration testing conditions of newly designed or modified aircraft structures. In order to achieve reliable random analysis technique it is necessary to obtain a good correlation between numerical (finite element method) and analytical techniques. This paper presents the determination of random stress in aircraft structure by frequency domain approach. Validation of the approach is shown by performing random analysis on a single degree of freedom system and comparing the results by both analytical approach and finite element technique. On determination of random stresses the importance of random analysis in aircraft structure is mentioned as it leads to fatigue failure of the components

Keywords: Random Vibration, Power Spectral Density, Root Mean Square Value, Random Stress, Frequency

DOI: https://doi.org/10.15623/ijret.2017.0612011