Theses and Dissertations
The Effect of Heat Generation in the Railroad Bearing Thermoplastic Elastomer Suspension Element on the Thermal Behavior of Railroad Bearing Assembly
Date of Award
Master of Science (MS)
Dr. Constantine Tarawneh
Dr. Arturo Fuentes
Dr. Robert Jones
Understanding the internal heat generation of the railroad bearing elastomer suspension element during operation is essential to predict its dynamic response and structural integrity, as well as to predict the thermal behavior of the complete railroad bearing assembly including the bearing adapter. The latter is essential for sensor selection and placement within the adapter (e.g., typical temperature sensors have operating ranges of up to 125°C or 257°F). The internal heat generation is a function of the loss modulus, strain, and frequency. Based on experimental studies, estimations of internally generated heat within the thermoplastic elastomer pad were obtained. The calculations show that the pad internal heat generation is impacted by temperature and frequency. However, during service operation, exposure of the suspension pad to loading frequencies above 10 Hz is less likely to occur. Therefore, internal heat generation values that have a significant impact on the suspension pad steady-state temperature are less likely to be reached. An experimentally validated finite element thermal model that can be used to obtain temperature distribution maps of complete bearing assemblies in service operation conditions is presented. This thesis summarizes the work done to investigate the effect of the internal heat generation in the thermoplastic elastomer suspension element on the thermal behavior of the railroad bearing assembly.
Rodriguez, Oscar Osvaldo, "The Effect of Heat Generation in the Railroad Bearing Thermoplastic Elastomer Suspension Element on the Thermal Behavior of Railroad Bearing Assembly" (2018). Theses and Dissertations. 394.
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