Análise da influência das vibrações na ruptura do tubo entre compressor - exaustor e intercooler nas locomotivas GE C30 ACI na CFM-Sul

Abstract

Efficient maintenance of locomotives is crucial for ensuring safety and operational effectiveness. This work addresses a recurring issue in GE C30 ACI locomotives at CFM-Sul, focusing on the connecting tube between the compressor-exhauster and the intercooler, where frequent failures have been identified. The investigation utilized both theoretical vibration analysis and practical measurements with an accelerometer. Despite the high calculated natural frequencies, the actual measured frequencies were significantly lower, indicating that resonance is not the cause of failure. However, significant vibrations create alternating stresses that contribute to fatigue and potential tube rupture. To address this issue, a design proposal was made for a tube with a vibration absorbing metallic expansion joint welded onto it. This expansion joint is intended to mitigate vibration transmission and handle dimensional variations. The proposed solution is feasible, with an estimated cost of approximately 15,500.00 MT, and aims to enhance the tube's dynamic flexibility and reduce the frequency of unscheduled maintenance. This project underscores the importance of vibrational analysis in preventive maintenance and offers a practical solution to improve the reliability of critical components.