The Loading Approaches of Bolt Pre-tightening Force

The precise loading approaches of the bolt pre-tightening are of great importance to the stress analysis of the bolt and the suffered-force analysis characteristic of the blot join discreteness. The leaf root bolt of the controllable pitch propeller oar is taken as example. The calculating model is constructed by finite element software; the simulating analysis is applied in the loading approach of the bolt pre-tightening force, the result shows that both of the two approaches could simulate the bolt pre-tightening effectively.