DYNAMIC ANALISYS of MODIFIED BOGIE - CASE STUDY: K9 BOGIE

• Main Author: Ramdhani, Muhammad
• Format: Final Project
• Language: Indonesia
• Subjects: Teknik (Rekayasa, enjinering dan kegiatan berkaitan)
• Online Access: https://digilib.itb.ac.id/gdl/view/40622
• Institution: Institut Teknologi Bandung

On the request of PT KAI, PT INKA did reconditioning and modifications to bogie K9. The results of running test showed that the using scale value Wz ride Sperling index value is greater than 2.5 for the vertical and longitudinal directions at the speed 60-80 km/h. That value stated that of bogie K9 comfort was not good quality especially in the vertical and longitudinal directions. In addition, there was a great vibration at the speed of 70-80 km/h during the test. This task aims to analyze the problems. The analysis was performed to point out the root cause of problem on the modified K9 bogie by comparing the dynamic analysis of modified K9 bogie with the design guidelines of the bogie. The studies show that there are four important aspects in designing bogie, which are: the spring rate aspect, the damping ratio aspect, the traction device aspect, and the aspect of inequality of the natural frequency on the body of the train and the structure of the bogie. The results of the analysis show that the modified K9 bogie has fulfilled the design requirements for the spring rate aspect. However, several deficiencies are still present, specifically the problem on the placement and resilience of the traction device that caused vibration in the longitudinal direction, the natural frequency of the first vertical bending mode on the body of the train that closes to the natural frequency of the pitching structure of the bogie that may cause interference, and the occurrence of resonance due to the to the train operates at its crtitical speed.