Pengembangan Aspek Desain Pegas Dukung Kereta Api, Studi Kasus: Pegas Dukung Yang Diproduksi Balai Yasa Manggarai
Train is a passengers or goods railway transportation mode which has many advantages, mainly because of its high capacity, efficiency, safety, and smooth traffic. Coil spring is one of the most important components of the train. Generally, it can be divided into three groups, they are, journal, inne...
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| Format: | Final Project |
| Language: | Indonesia |
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| Online Access: | https://digilib.itb.ac.id/gdl/view/37967 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Train is a passengers or goods railway transportation mode which has many advantages, mainly because of its high capacity, efficiency, safety, and smooth traffic. Coil spring is one of the most important components of the train. Generally, it can be divided into three groups, they are, journal, inner bolster, and outer bolster springs. Nowadays, coil spring, especially journal spring, is identified as the most frequent component that causes failure in the train system. Thus, it gives rise to the unscheduled down time.
This final project consists of the stress analysis and the fatigue analysis of the journal springs which materials are imported from China, India, and Japan, and manufactured by Balai Yasa Manggarai. The stress analysis is carried out both theoretically and numerically using Finite Element Method (FEM) by means of ANSYS Workbench 10.0 software. There are several different simulations to model the loading cases such as static, dynamic, and impact loading cases which conducted in 1.5, 2, 2.5, and 3 times of static loading (g).
The stress analysis shows that theoretically journal spring is fully deflected at 1.23 g, while computationally using FEM, it is fully deflected at 1.19 g. Fatigue analysis shows that each journal springs possesses a different fatigue life, and the one from China possesses the highest fatigue life that is 47,799.01 km, with assumption rail connection’s distance is 84 m. The design aspect development is conducted at the production process by shot peening, using the temperature measurement device, and winding process. The analysis of the improved design shows that all journal springs do not experience a failure due to fatigue, except the spring with the material from Japan which still has the finite life when the loading is twice or more of the static loading, that is 60,175.39 km. |
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