Analysis of Taxiing Induced Vibrations in Aircraft by the Power Spectral Density Method

摘要

Taxiing induced vibrations in large aircraft due to runway and taxiway unevenness have been recognized as a significant factor in causing airframe metal fatigue damage and dynamic stressing, as well as discomfort for the crew and passengers. Vibration of the landing gear also causes seal wear with subsequent leakage of air and hydraulic fluid. The report presents an analytical method of determining the random vibration response of a flexible aircraft caused by runway unevenness transmitted through the main landing gear struts. The aircraft used in the computation of vibration response is the Boeing KC-135A (Stratotanker) in the fully loaded configuration (324,000 lb) (146,963 kg).