Spectrum Analysis of Linear Time Invariant Gyroscopic System

Ishak, Siti Nadiah (2011) Spectrum Analysis of Linear Time Invariant Gyroscopic System. [Final Year Project] (Unpublished)

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This dissertation presents the research that had been done on Final Year Project
(FYP) entitled Spectrum Analysis of Linear Time Invariant Gyroscopic System. This
project involved dynamic analysis of a system called gyroscopic system using computer
software which is ANSYS. This project is an extension of previous project done by Sibi
Chacko on determination of response spectrum of gyroscopic system when subjected to
random excitation by using finite element method. This project is focused on research
and study on random vibration analysis of a compliant shaft about using ANSYS
Spectrum Analysis. The first part of this study covered on the research and study of
previous gyroscopic system and application of finite element method for random
vibration analysis using ANSYS software. The shaft is modeled into beam element and
free to rotate about it axis to indicates the gyroscopic effect on the beam element. The
second part of this study is done by conducting the analysis on the beam element using
ANSYS. The analysis is done in two parts which is free vibration analysis and random
vibration analysis. Free vibration or ANSYS Modal Analysis is done prior to calculate
the response spectrum in ANSYS Spectrum Analysis. Results obtained in ANSYS
Modal Analysis are in form of mode shapes and natural frequencies when the beam
undergoes transverse vibration. ANSYS Spectrum Analysis is carried out for random
vibration analysis. The beam element is subjected to white noise excitation at both ends
and analysis is carried out. White noise PSD input of value 1 is used as input excitation
at beam element ends. Power Spectral Density (PSD) response is the results of interest
for random vibration analysis. The graph obtained is plotted in power spectral density
function in frequency domain. The response spectrum is extracted at any nodes and
characteristics of the response are analyzed. The PSD versus frequency graph are plotted
at different node to analyze the trend of the response. PSD response graph for each node
are compared and frequency at where the PSD excited is calculated.

Item Type: Final Year Project
Subjects: T Technology > TJ Mechanical engineering and machinery
Departments / MOR / COE: Engineering > Mechanical
Depositing User: Users 2053 not found.
Date Deposited: 31 Oct 2013 08:52
Last Modified: 25 Jan 2017 09:42
URI: http://utpedia.utp.edu.my/id/eprint/10110

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