Exact Multiplicity and Stability of Periodic Solutions for Duffing Equation with Bifurcation Method

Exact Multiplicity and Stability of Periodic Solutions for Duffing Equation with Bifurcation Method
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分叉法Duffing方程周期解的精确重数和稳定性

DOI:
10.1007/s12346-018-0296-x
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发表时间:
2018-10
影响因子:
1.4
通讯作者:
梁树青
梁树青
中科院分区:
数学4区
文献类型:
--
作者:
梁树青

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在关于恢复力导数的Lp-Lp-范数(p∈[1,∞]p∈[1,∞])假设下,研究了Duffing方程2π2π-周期解的精确多重性和稳定性.它的非平凡2π2π周期解是正的或负的,分支曲线是唯一的反S形曲线.与L∞L∞-范数条件相比,恢复力条件类得到了推广.该证明基于全局分歧定理、拓扑度以及Hill方程周期特征值的LpLp-模估计(p∈[1,∞]p∈[1,∞])。
Under some LpLp-norms(p∈[1,∞]p∈[1,∞]) assumptions for the derivative of the restoring force, the exact multiplicity and the stability of 2π2π-periodic solutions for Duffing equation are considered. The nontrivial 2π2π-periodic solutions of it are positive or negative, and the bifurcation curve of it is a unique reversed S-shaped curve. The class of the restoring force is extended, comparing with the class of L∞L∞-norm condition. The proof is based on the global bifurcation theorem, topological degree and the estimates for periodic eigenvalues of Hill’s equation by LpLp-norms(p∈[1,∞]p∈[1,∞]).
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