Abstract: The combined action of multi-directional forces, torques and heavy impact loads and the nonlinear rheological characteristics of grease in turret race can cause the dynamic evolution of its dynamic behavior and lubrication performance at the different launching angles, and then affect the firing accuracy and strike performance of tank gun. The force, contact radius and motion of the turret race were analyzed in considering the effect of the launching angle on the performance of turret race. On this basis, the distribution law of the maximum contact load of turret race at different launching angles was obtained by dynamics simulation. A contact lubrication performance analysis model based on dynamics and elastohydrodynamic lubrication theory was established for turret race. The changing laws of the pressure and oil film thickness in the contact area of turret race under the influences of different launching angles, load and rheological index were studied. The result show that the oil film pressure increases gradually and the oil film thickness decreases with the increase in the load. With the increase in rheological index, the secondary pressure peak of oil film became obvious and the oil film thickness increase. With the increase in the launching angle, the maximum contact load and the maximum oil film pressure tends to increase, and then the minimum oil film thickness tends to decrease, so the turret race has better performance when the launching angle is depression angle under the specific hitting capacity (recoil force) index.

Key words: tank, turretrace, launchingangle, dynamicssimulation, lubricationperformance