EngAnalysis investigated the relationship between 3-piece bogie warp and rail wheel squeal. Our engineers developed test procedures and advanced software for testing, quantification and analysis of bogie warp stiffness and rotational resistance, then undertook on-track test programs to measure the instantaneous bogie warp, rotation and angle of attack.
Complexities due to the range of external variables, degrees of freedom, and uncertainties were captured and defined by using a statistical approach to reporting. Video reports were developed to animate sections of the wagon’s journey. Bogie frame animations using measured data, alongside maps and time domain plots of warp, angle of attack, and bogie rotation visualise the results.
The measurement system used an array of world class amplifiers and signal conditioner units, power management systems, and communications that allowed remote supervision of the test run.