Abstract
Abstract The train’s bogie consists of suspension systems and mechanical links. The hydraulic damper is a crucial part of the suspension system to ensure safety and comfort. The primary vertical damper mostly linear is responsible for reducing vibrations transmitted from the rails to the wheels of a High Speed Train. During the damper design, certain geometric parameters such as the diameter of the valves, spring constant, preload force and valve orifice diameter are adjusted to achieve the desired force-velocity characteristic by DISPEN. This process can be both cumbersome and costly in terms of time and money. A non-linear physical model is developed solving stiff ordinary differential equations predicting the dynamic pressure variations inside the damper and the dynamics of the piston valves caused by external excitation. New methods of tangling numerical discontinuities have been discussed and pressure losses have been deployed to predict the opening of the valves. The model is then validated against stringent criteria with the test-bench results and used for optimising values to obtain suitable force-velocity characteristics for integrated dynamic calculations.
Published Version
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