Abstract
A force measurement system, referred to as “dynamometer”, for accurately acquiring the contact forces and moment in a single-wheel roller rig using piezo-electric load cells is designed and developed. Accurate determination of the wheel–rail contact forces and moments is an essential requirement for studying the wheel–rail contact mechanics. The dynamometer is placed in the load-path between the wheel–rail interface and the ground, enabling it to measure the forces and moments at the interface. A series of tests are performed to determine the quasi-static and dynamic characteristics of the dynamometer. Additionally, finite element analysis and multi-body dynamic modeling are used to establish flexural modes and dynamic interface between the components. The simulation and test results indicate that the dynamometer is able to accurately and reliably measure the contact forces and moments at the wheel–rail interface.
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