In this paper,by using the generalized variational principle and Riccati technique,new oscil-lation criteria for second order nonlinear damped perturbed differential equation (r(t)Ψ(y(t))y′(t)α-1y′(t))′+p(t)Ψ(y(t))y′(t)α-1y′(t)+q(t)f(y(t))=e(t)are established, which improve and generalize the existing results.%利用广义变分原理和 Riccati 变换建立了带有阻尼项的二阶强迫非线性微分方程(r(t)Ψ(y(t)) y′(t)α-1y′(t))′+p(t)Ψ(y(t)) y′(t)α-1y′(t)+q(t)f(y(t))=e(t)的振动准则,并改进和推广了已有的研究成果。
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