Based on the preliminary analysis of the change mechanism of the turbine blade tip clearance
the simplified model of blade
rotor and casing was established
and the effect of rotor vibration amplitude of aero craft in-flight maneuver state was researched.The results show:reduction of clearance is approximately 0.44 to 1.45 mm;local tip clearance would increase or decvease caused by uniformity acceleration of aero craft;pitching maneuver and horizontal circling would bring vibration of tip clearance
which makes the nonlinear of clearance variation markedly enhanced.