Title

Analysis of Aircraft Structural Fatigue Under Random Vibration Loadings Based on Information in Frequency Domain.

Authors

Meng FanTao; Hu Yuyu

Abstract

A new calculation, named the power spectral density (PSD), is proposed for estimating structural vibration fatigue. The method is based on the information of the frequency domain of random loading history. Firstly, the transfer function is obtained by calculating the frequency response of the structure. Secondly, the transfer function is multipled with the input of the power spectrum to obtain the power spectral density of the stress of the structure, and coupled with the material parameters and the appropriate damage model. The fatigue strength of the structure is caculated through frequency-domain method. Compared with some certain standards, the strength of the wing is analyzed on the stress response PSD function by finite element analysis (FEA) under random vibration loadings.

Subjects

RANDOM vibration; STOCHASTIC processes; SPECTRAL energy distribution; STRUCTURAL dynamics; FINITE element method

Publication

Journal of Nanjing University of Aeronautics & Astronautics / Nanjing Hangkong Hangtian Daxue Xuebao, 2012, Vol 44, Issue 1, p32

ISSN

1005-2615

Publication type

Academic Journal