Development of mathematical model for monorail suspension system under different track conditions
Traffic problems in major cities around the world during the last two decades have presented important needs of new transportation systems. Currently, there is an increased demand on public transportation systems, especially in mega cities. This increased transportations demand, pushed transporta...
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| Format: | Thesis |
| Language: | English English English |
| Published: |
2015
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| Subjects: | |
| Online Access: | http://eprints.uthm.edu.my/1498/2/WAFI%20ADAM%20BAKHIT%20MABROUK%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/1498/1/24p%20WAFI%20ADAM%20BAKHIT%20MABROUK.pdf http://eprints.uthm.edu.my/1498/3/WAFI%20ADAM%20BAKHIT%20MABROUK%20WATERMARK.pdf |
| Summary: | Traffic problems in major cities around the world during the last two decades have
presented important needs of new transportation systems. Currently, there is an increased
demand on public transportation systems, especially in mega cities. This increased
transportations demand, pushed transportation authorities to plan new projects and expand
existing monorail systems to accommodate the increase demand. This required engineers
to develop and design larger monorail systems. New Monorail designs require more
powerful bogies with new dimensions to accommodate more passengers, therefore new
suspension system design is essential. In order to overcome new designs problems, better
understanding of the suspension system is needed by mathematically modeling the system
to predict some dynamic characteristics of a new design. This research work concentrates
on the modeling and simulation of 15 degrees of freedom full-car Monorail suspension
system. The model features the Monorail body, Front bogie and rear bogie geometries.
Lagrange’s equation was used to obtain the equations of motion of the monorail
suspension system and system matrices. Numerical Central Difference method was used
to obtain the system responses subject to sinusoidal Track excitations. Three Track
scenarios that has different loads and different driving speeds were conducted to
investigate the monorail suspension system, programmed in MATLAB. The system
results are analyzed in terms of their dynamic responses. Fourier Fast transform was used
to calculate the frequency ranges of dynamic responses. As a result, some very important
characteristics of the Monorail suspension system were revealed, with indicators that helps
understanding the effects of driving speeds and different loads, which can be used to better
understand the system dynamic performance, to improve the original design specifications
and detect Monorail suspension system problems. |
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