Definition and cause of formation of extraordinary angle was illustrated.

To figure out the law of the variety of the moment at the end of a column in a non-sway cell-closed frame when the second order p-δ effect is under consideration,a rule based on the type of restrain relationship of the beam and the column plus the second order additional rotation of the joint was presented,which was illustrated and verified by the results of typical examples.

For this approach, the influences of static wind action, added attack angle of deck, self-excitation force and modes participation of cables can be taken into account, and the lateral, vertical as well as torsional frequencies can be iteratively searched simultaneously.

The influence of the pile foundation rigidity,cable segmentations,wind profiles,deck initial and added attack angles on deck displacements,pylon displacements,aerostatic divergence wind velocities and mode frequencies are comprehensively investigated.

Research on Five Axis Postprocessor for CNC Machine with Additional Table;

For solving the torsional vibration problem of the work spindle caused by the additional rotation in helical gear shaping,a tooth-leap shaping method of helical gears was presented,its working principle,and mathematical model were introduced,and the method presented was verified by an example.