The Asymptotic Behavior Of Second Order Impulsive Differential Equations And Vibration

In this paper ,we consider the oscillatory and asymptotic behavior of two kinds of two order impulsive functional differential equations.Some sufficient conditions about the oscillatory behavior of the nonlinear ordinary and functional differential equations with impulses are obtained .Furthermore, we discuss the boundary ,asymp-totic and osciallatory behavior of two order linear (nonlinear) impulsive differential equations with delay.The discussion of the boundary behavior use Liapunov function method. The results indicate enough the effect of the impulse on the equation .