Quasi-periodic solutions of nonlinear beam equation with prescribed frequencies

Quasi-periodic solutions of nonlinear beam equation with prescribed frequencies
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规定频率非线性梁方程的准周期解

DOI:
10.1063/1.4919673
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发表时间:
2015-05
影响因子:
1.3
通讯作者:
Li, Yong
Li, Yong
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Chang, Jing;Gao, Yixian;Li, Yong

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Consider the one dimensional nonlinear beam equation utt + uxxxx + mu + u3 = 0 under Dirichlet boundary conditions. We show that for any m > 0 but a set of small Lebesgue measure, the above equation admits a family of small-amplitude quasi-periodic solutions with n-dimensional Diophantine frequencies. These Diophantine frequencies are the small dilation of a prescribed Diophantine vector. The proofs are based on an infinite dimensional Kolmogorov-Arnold-Moser iteration procedure and a partial Birkhoff normal form.
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