The effects of reduction in the center of reduction by selection inertial force system at any point and the reduction of instantaneous center of velocity and instantaneous center of acceleration are in- vestigated , which gives a relatively perfect comparison to the choice of center of mass and point.

Compared with other reduced mechanisms,this mechanism is valid within a wider flame range,and compared with comprehensive mechanisms,this mechanism is more suitable to couple with the multidimensional CFD model.

Affects of the simplified precondition to hydraulic pressure pulse;