By introducing the concept of non-equilibrium force,and analyzing the rules of the stress,strength and velocity of slopes,the motion mechanism of slopes is studied.

Though analysis the dynamic unbalance moment of couple on three ring reducing gear,puts forward the improvement of plan for the bearing liveload Changes the two eccentricity of three ring for three eccentricity of three ring Eliminates dynamic unbalanc emoment of couple and additive liveload on the bearing from three ring reducing gear It provides useful help for design,use and maintenanc

In order to study dynamic imbalance force of the moving valve core in regulating,the inner flow field model of the valve body is established by CFD of ANSYS,and the moving boundary between the valve core and the fluid is dealt with using Arbitrary Lagrangian-Eulerian(ALE).

Through combining the actual condition of the piping layout of offshore platform and calculating the unbalance force caused by pulse,it confirms the method is the best.

Unbalance forces of the engine is the main reason for vibration of motorcycles.

On unbalanced forces in 3D elasto-plastic FEM analysis;

Under the action of a given load the area where unbalanced force area existed is the location of initial failure occurred.

The main ingredient of the theory is that the unbalanced forces of a deformable body in elasto-plastic elaborated.