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以平面Ｐｏｉｓｅｕｉｌｌｅ流为例，将一种就非线性振动系统提出的，能有效地克服κ—σ法局限性的新的渐近方法，推广应用于流动稳定性问题。所得结果与应用κ—σ法得到的结果在低阶近似的情形下作了比较。
Taking plane Poiseuille flow as an example, a new asymptotic method proposed by nonlinear vibration system that can effectively overcome the limitation of κ-σ method is extended to flow stability problem. The results obtained are compared with the results obtained using κ-σ method in the case of low order approximation.