The multiple dimension Lindstedt-Poincaré method and IHB method are used to study the nonlinear vibration of axially moving beams.
本文分别采用多元L-P法和增量谐波平衡法（IHB法）研究轴向运动梁的横向非线性振动。
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The modified Lindstedt-Poincaé method(MLP) is used t analyze strongly nonlinear vibration of beams. Attention is focused on the superhamonic and subharmonic resonances.