应用何吉欢的变分迭代算法，求解得到了一类的强非线性振动方程。
The variational iteration method proposed by Ji-huan he was applied to a kind of strongly nonlinear oscillators.
本文采用改进的L -P法研究梁的强非线性振动，分析了超谐波共振和次谐波共振两种情况。
The modified Lindstedt-Poincaé method(MLP) is used t analyze strongly nonlinear vibration of beams. Attention is focused on the superhamonic and subharmonic resonances.
阐述利用最新提出的同伦分析方法求解有正阻尼的强非线性振动方程，得到了该方程的六阶近似解析解。
In this paper, the sixth-order approximate analytical solutions of the strong nonlinear oscillation with positive damping are obtained by using newly developed homotopy analysis method.
用线化法，权残法和插值摄动法相结合的方法求得了一类有正阻尼的强非线性振动问题的近似瞬态解，精度好。
In this paper, using the interpolation perturbation method, the authors seek to solve two classes of weakly nonlinear oscillations.
用线化法，权残法和插值摄动法相结合的方法求得了一类有正阻尼的强非线性振动问题的近似瞬态解，精度好。
In this paper, using the interpolation perturbation method, the authors seek to solve two classes of weakly nonlinear oscillations.
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