Simulation of high static low dynamic stiffness (HSLDS) using harmonic balances method / Wan Mohd Fahmi Wan Hassin

In engineering application, vibration isolator is significantly important to reduce the vibration. Unfortunately, most of the vibration isolator that commonly used today is limited by the mount stifmess to support a static load. Many of researchers try to improve this system by incorporating a negat...

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Main Author:	Wan Hassin, Wan Mohd Fahmi
Format:	Thesis
Language:	English
Published:	2010
Subjects:	Magnetism
Online Access:	https://ir.uitm.edu.my/id/eprint/67490/2/67490.pdf
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spelling	my-uitm-ir.674902022-09-27T04:58:46Z Simulation of high static low dynamic stiffness (HSLDS) using harmonic balances method / Wan Mohd Fahmi Wan Hassin 2010 Wan Hassin, Wan Mohd Fahmi Magnetism Dynamic loading conditions. Structural dynamics. Vibrations In engineering application, vibration isolator is significantly important to reduce the vibration. Unfortunately, most of the vibration isolator that commonly used today is limited by the mount stifmess to support a static load. Many of researchers try to improve this system by incorporating a negative stiffness element in the mount such that the dynamic stiffness is much less than the static stifmess. This combination is called High Static Low Dynamics Stifmess (HSLDS) mount. The aim of this project is to verify the experimental work done by Alessandro Carrella (2008) entitled "Passive Vibration Isolators with High-Static-Low-Dynamic-Stiffness" by simulating the system using Simulink. To achieve this objective, the benefit of HSLDS system is study. From the HSLDS the force and stifmess displacement is expressed in cubic polynomial. Then, the system is presented in the form of Duffing equation. In this thesis, only a first-order nonlinear analysis is carried out. Harmonic balance method is used to solve the equation of motion when the system is subject to a harmonic excitation. The main feature of the dynamic response of a Duffing oscillator is the jump phenomenon (include jump-up). Jump phenomenon occurs because of the existence of bifurcation points at which the system response 'jumps' from one stable branch to another. The parameter used to evaluate the effectiveness of the isolator is the transmissibility. In order to shows the benefits offered by the HSLDS isolator, the transmissibility of the HSLDS and a linear isolator is plotted on the same graph. Duffing equation and harmonic balance equation are modeled by using Simulink to prove the jump phenomenon. Then, from the jump phenomenon graph, analysis is carried out in order to compare the HSLDS isolator with the linear isolator. 2010 Thesis https://ir.uitm.edu.my/id/eprint/67490/ https://ir.uitm.edu.my/id/eprint/67490/2/67490.pdf text en public degree Universiti Teknologi MARA (UiTM) Faculty of Mechanical Engineering Mohd Nor, Mohd Asri
institution	Universiti Teknologi MARA
collection	UiTM Institutional Repository
language	English
advisor	Mohd Nor, Mohd Asri
topic	Magnetism Magnetism
spellingShingle	Magnetism Magnetism Wan Hassin, Wan Mohd Fahmi Simulation of high static low dynamic stiffness (HSLDS) using harmonic balances method / Wan Mohd Fahmi Wan Hassin
description	In engineering application, vibration isolator is significantly important to reduce the vibration. Unfortunately, most of the vibration isolator that commonly used today is limited by the mount stifmess to support a static load. Many of researchers try to improve this system by incorporating a negative stiffness element in the mount such that the dynamic stiffness is much less than the static stifmess. This combination is called High Static Low Dynamics Stifmess (HSLDS) mount. The aim of this project is to verify the experimental work done by Alessandro Carrella (2008) entitled "Passive Vibration Isolators with High-Static-Low-Dynamic-Stiffness" by simulating the system using Simulink. To achieve this objective, the benefit of HSLDS system is study. From the HSLDS the force and stifmess displacement is expressed in cubic polynomial. Then, the system is presented in the form of Duffing equation. In this thesis, only a first-order nonlinear analysis is carried out. Harmonic balance method is used to solve the equation of motion when the system is subject to a harmonic excitation. The main feature of the dynamic response of a Duffing oscillator is the jump phenomenon (include jump-up). Jump phenomenon occurs because of the existence of bifurcation points at which the system response 'jumps' from one stable branch to another. The parameter used to evaluate the effectiveness of the isolator is the transmissibility. In order to shows the benefits offered by the HSLDS isolator, the transmissibility of the HSLDS and a linear isolator is plotted on the same graph. Duffing equation and harmonic balance equation are modeled by using Simulink to prove the jump phenomenon. Then, from the jump phenomenon graph, analysis is carried out in order to compare the HSLDS isolator with the linear isolator.
format	Thesis
qualification_level	Bachelor degree
author	Wan Hassin, Wan Mohd Fahmi
author_facet	Wan Hassin, Wan Mohd Fahmi
author_sort	Wan Hassin, Wan Mohd Fahmi
title	Simulation of high static low dynamic stiffness (HSLDS) using harmonic balances method / Wan Mohd Fahmi Wan Hassin
title_short	Simulation of high static low dynamic stiffness (HSLDS) using harmonic balances method / Wan Mohd Fahmi Wan Hassin
title_full	Simulation of high static low dynamic stiffness (HSLDS) using harmonic balances method / Wan Mohd Fahmi Wan Hassin
title_fullStr	Simulation of high static low dynamic stiffness (HSLDS) using harmonic balances method / Wan Mohd Fahmi Wan Hassin
title_full_unstemmed	Simulation of high static low dynamic stiffness (HSLDS) using harmonic balances method / Wan Mohd Fahmi Wan Hassin
title_sort	simulation of high static low dynamic stiffness (hslds) using harmonic balances method / wan mohd fahmi wan hassin
granting_institution	Universiti Teknologi MARA (UiTM)
granting_department	Faculty of Mechanical Engineering
publishDate	2010
url	https://ir.uitm.edu.my/id/eprint/67490/2/67490.pdf
_version_	1783735690670899200

Simulation of high static low dynamic stiffness (HSLDS) using harmonic balances method / Wan Mohd Fahmi Wan Hassin

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