Marine gas turbines operate under harsh sea wave environments, including fluctuating operating parameters and underwater explosions. Comment6:These conditions amplify nonlinear vibrations in the bearing-rotor-case system, exacerbating micro-lubrication degradation at the interface. Frequent relative slip, localized friction-induced temperature spikes, and eventual gluing failures are observed. To investigate the gluing failure mechanism of interfaces under these circumstances, this paper has developed an impact dynamic-three dimensional mixed lubrication coupling analysis model, that takes into account factors such as load transfer paths along the main structure of gas turbines, non-Newtonian fluid rheological characteristics of lubricating oil, real surface roughness effects. The present study reveals critical insights into the temperature evolution and tribological behavior of bearing interfaces under impact loading conditions. Transient impact loading induces a remarkable 3-fold amplification in interfacial temperature rise compared to steady-state operations. Simultaneously, the synergistic effect of surface topography and impact dynamics elevates the peak temperature escalation reaches 94.8% in rough surfaces (Rq = 3 μm) versus smooth counterparts under identical impact conditions，and increase friction coefficient by 10.2%, remarkable expands gluing risk zones. These results provide important insights for the reliability design of gas turbine bearings under impact load conditions.
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