Investigation into vibration problems in 24 Class locomotives using COMO-R

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Authors: Rahman, A.G.A. and Noroozi, S.

Journal: Insight: Non-Destructive Testing and Condition Monitoring

Volume: 40

Issue: 8

ISSN: 1354-2575

The design and construction of modern mechanical structures is in many cases a process of putting together a set of individually optimized components, and rarely results in an optimal solution. A typical example is vehicle design. Improved static design tools, implementation on computers, and so on have resulted in lighter structures carrying more payload. Improved materials have also led to lighter constructions which, together with increased propulsion power, inherently contain potential ergonomic problems in terms of fatigue, noise and vibration. The high rate of fatigue failures for the 24 Class locomotives due to breakage of components has prompted an urgent need for investigation into the inherent vibration problems associated with this Class of locomotives. The study must be divided into two parts, namely dynamic design verification of the locomotive using modal analysis; and condition monitoring of the engine components using vibration spectrum analysis. This paper concentrates on identifying the dynamic characteristics of this Class of locomotives and proposes major design changes.

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