ANALISIS KEGAGALAN FATIGUE PADA STRUKTUR BATTERY BRACKET KERETA CEPAT

• Main Author: Alexander, Daffa'
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/71369
• Institution: Institut Teknologi Bandung

As a land transportation that is starting to be used more frequently as well as having the potential of carrying a large number of passengers, an analysis on the structure of a high-speed train is certainly needed to be carried out to guarantee the passenger’s safety and comfort. This research analyzed fatigue failure on the structure of high-speed train’s battery bracket as well as it’s fastener that connects to the underframe structure. Static analysis on the battery bracket is performed to obtain reaction forces that later used for dynamic analysis. The result of dynamic analysis is then used to perform the calculation of battery bracket’s fatigue life. The dynamic analysis on the battery bracket also yielded concentrated force spectrum on the positions where fasteners are to be placed. Concentrated force spectrum is then used to perform dynamic analysis on the fastener structure. The dynamic analysis result is then also used to obtain the fatigue life. Rainflow cycle counting method and Miner’s Rule are implemented for the purpose of obtaining the structures’ fatigue life. Assuming a track length of 140 kilometers for Makassar – Parepare route, consisting case of a tangent track where the train has a constant speed of 110 km/h and 250 km/h and a turn track with radius of 2000 m, as well as 1 round trip per-day of the train’s operation, it's obtained that the battery bracket structure will be functional up to 56 years of operation (equivalent of 20499 trip), while the fastener has a fatigue life of up to 54 years (equivalent of 19668 trip).