Abstract
The dynamic behaviour of a linear rotor with a complex turning gear, multidegree of freedom, similar to the turning gear mechanism of large turbomachinery, including backlash, was examined analytically. Clash-engagement and pre-engagement methods were considered. The coefficient of friction used in the analysis was a nonlinear function of speed and load for bearings operating in the mixed lubrication regime under stick-slip conditions. Shaft torque and turning gear teeth loading were considerably lower during pre-engagement. The use of constant coefficient of friction produced smoother but erroneous results.
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