Research on Stress Response of Cantilever Beam under Super-Gaussian Base Acceleration Excitation

DOI

10.2991/iccmcee-15.2015.89How to use a DOI?

Keywords

super-Gaussian, base acceleration excitation, stress response, cantilever beam

Abstract

Stress response is the foundation for calculating a structure’s fatigue life during vibration testing. The frequency-domain method based on stress frequency-response function (SFRF) is widely used because of its convenience. For Gaussian random excitation, the frequency-domain method may have a good accuracy. But when it comes to super-Gaussian random excitation, this method is not that applicable. In this paper, the time-domain method for calculating the stress response of a cantilever beam under super-Gaussian random excitation is proposed by using mode superimposition method. Two numerical examples are presented with the help of MATLAB. As a result, for linear system, when the excitation is Gaussian (super-Gaussian) distributed, the stress response is Gaussian (super-Gaussian) distributed. And when the frequency span of the excitation keeps the same, the larger the kurtosis of the excitation is, the larger the kurtosis of the response will be. For super-Gaussian stress response, the bandwidth of the excitation can influence the kurtosis of the stress response. Specifically, the narrower the bandwidth is, the larger the kurtosis will be.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

Download article (PDF)

TY  - CONF
AU  - YuMan Liu
AU  - Yu Jiang
AU  - Xun Chen
PY  - 2015/11
DA  - 2015/11
TI  - Research on Stress Response of Cantilever Beam under Super-Gaussian Base Acceleration Excitation
BT  - Proceedings of the 2015 4th International Conference on Computer, Mechatronics, Control and Electronic Engineering
PB  - Atlantis Press
SP  - 475
EP  - 482
SN  - 2352-5401
UR  - https://doi.org/10.2991/iccmcee-15.2015.89
DO  - 10.2991/iccmcee-15.2015.89
ID  - Liu2015/11
ER  -