Perpustakaan Digital ITB

The primary objective of this research is to design and optimize anti-climber structures for a light rail transit (LRT) crash energy absorbing system to im- prove its passive safety performance. The anti-climber device reduces the risk of overriding for rail vehicles in case of a car-to-car accident. This research studies the in uence of the anti-climber device on the system's crashworthi- ness and estimates the optimum conguration to achieve the best crash energy absorbing and crashbox deforming performances. The base model of the LRT's front-end cab is adapted from the existing designs of the LRT Jabodebek conguration. The anti-climber model is mod- ied into several variations, to which design factors are assigned based on the L16 orthogonal array. Then, the optimum anti-climber conguration is esti- mated using Taguchi's Robust Parameter method. The controlled variables are analyzed for their in uence on the performance using the Analysis of Vari- ance (ANOVA) method. The results show that the optimum conguration for the system's crash energy absorbing and crashbox deforming performances are toothed ends-Al6061-T6-30 mm-lower oset and toothed ends-Al6061-T6- 20 mm-lower oset, respectively. The most in uential factor for the system's crash energy absorbing performance is the anti-climber material at 29.79% contribution. On the other hand, teeth thickness is the most in uential factor to the crashbox deforming performance at 50.26% contribution. The optimiza- tion estimates the system's energy-absorbing performance to improve by 1.5 dB gain and the crashbox deforming performance by 3.3 dB gain.