Rotor dynamics analysis is essential for improving robustness in hydropower machine design. The generator is of particular interest due to its considerable size, small air gaps and strong dynamic influence. Generators comprise rotating and stationary parts that operate under substantial thermal, centrifugal and electromagnetic loads. Short-circuit faults produce severe magnitudes of electromagnetic torque, leading to excessive vibration. This paper investigates a 180 MW synchronous hydropower generator using finite element models of a floating-rim rotor and sliding-foot stator, with emphasis on torque transmission under short-circuit conditions. The results clarify load transfer mechanisms, identify critical structural points, and support improved generator design under fault loading.