Vibration control of structure using multiple passive vibration absorbers
Vibrations are undesired phenomenon in mechanical structures. It can cause damage, discomfort, destruction and disturbance of the system or the structure. In this study, the application of passive vibration absorber is investigated and its effectiveness are further researched by comparing the use of...
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| Main Authors: | , , |
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| Format: | Thesis |
| Published: |
2012
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| Subjects: | |
| Online Access: | http://eprints.uthm.edu.my/6900/ http://eprints.uthm.edu.my/6900/1/STG_1332.pdf |
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| Summary: | Vibrations are undesired phenomenon in mechanical structures. It can cause damage,
discomfort, destruction and disturbance of the system or the structure. In this study,
the application of passive vibration absorber is investigated and its effectiveness are
further researched by comparing the use of single and multiple absorber for the structural
vibration control. The vibration absorber system is designed to minimize the
vibration amplitude of a simply-supported beam and a simply-supported plate. The
beam and plate's vibration characteristic, such as natural frequency and mode shape
are determined using three approaches: experimental testing, analytical equations and
finite element analysis. In the initial stage, a finite element simulation study is conducted
using Ansysm to validate the analytical equations of Matlab and experimental
results of a simply-supported beam and a simply-supported plate. The preliminary result
indicates that the first four natural frequencies of a simply-supported beam and a
simply-supported plate are well-correlated between finite element, analytical and experiment
results. Later the research works are further performed with attached single
and multiple vibration absorbers. The result shows that multiple vibration absorber
produced better results compare to single vibration absorber attachment in reducing
the structural's resonance amplitude. The outcomes of overall global vibration reduction
for multiple absorber is 9 times while single absorber is only 6 times. In the end,
we can conclude that multiple vibration absorber is more effective and shows better
result in reducing the resonance vibration of the structure. |
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