OPTIMIZATION OF CRASHWORTHY COMPONENTS FOR THE RAILWAY SAFETY APPLICATION USING DESIGN FOR SIX SIGMA (DFSS) METHODOLOGY
The development of Light rail transit (LRT) is increasing rapidly. To support the program, it is important to consider various aspects of passenger safety to minimize injury risk and casualties in the event of an accident. In this study, the structural components of LRT are optimized to improve t...
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| Format: | Theses |
| Language: | Indonesia |
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| Online Access: | https://digilib.itb.ac.id/gdl/view/47666 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | The development of Light rail transit (LRT) is increasing rapidly. To support the
program, it is important to consider various aspects of passenger safety to minimize
injury risk and casualties in the event of an accident. In this study, the structural
components of LRT are optimized to improve the aspects of crashworthiness which
are, the Specific Energy Absorption (SEA) and the impact deceleration using
Trapezoidal Wave Approximation. The optimization method used in the design for
six sigma (DFSS) methodology is Taguchi orthogonal array L18. There are 8 control
factor with 3 level in each factor which results in 54 total numerical simulations.
The DFSS process provide the optimum design of the crashworthy components:
straight end underframe (type 2), end underframe thickness of 4 mm, material of
end underframe is 6063-T6 alumunium, mascara thickness 3.8 mm, cross section
of the crash box is C-beam, 6005-T1 alumunium as the material of end center sill,
trigger combined type, and the thickness of the end center sill is 11 mm. The
optimum crashworthy component design provides the specific energy absorption
SEA = 3.58 kJ/Kg, with the gain of 3.74 dB and 57.82% improvement compared to
the baseline design. The optimum design also provide the deceleration of 14.22 G,
with the gain of 4.26 dB and 32.44% improvement compared to the baseline design.
This optimum crashworthy component design can be implemented as parts of
crashworthy structure for the front end of the Light Rail Transit vehicle. |
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