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本文研究带参数高次扰动的平面近Hamilton系统Melnikov函数,利用一阶Melnikov函数来确定其在Hopf分支中极限环的个数. 相似文献
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本文证明（一阶）Melnikov函数在初等中心处关于Hamilton量至少为二次可微,井且得到二阶Melnikov函数为二次可微的充要条件,最后举例说明文[3,4]所讨论的一类扰动系统的后继函数在中心处不是二阶可微的． 相似文献
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1 IntroductionConsider a Hamiltonian system with small perturbationwhere E is a small parameter. H(x, y), P(x, y) and Q(x, y) are all real polynimials of x and ywith degH = n 1, degP degQ 5 n. We suppose there is a fandly of ovals r(h) C {H(x, y) = h}for h E (ho, h1).The nunther of limit cycles of (1.1). l which tend to some r(h) as e -- 0, is closely relatedto the number of isolated zeroes of Abelian integraJThe next problem is to determille the lowest bound of the isolated zeroes of M… 相似文献
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讨论了一类在分支值线性部分具有两个零特征根且只有一个Jordan块,而扰动项为n次的齐次平面向量场.讨论此类系统的分支的一个重要工具是:Melnikov函数,然而当n较大时,不易得到相应的性质.引入了一类判断函数,通过对该判断函数性质的研究,基本上确定了该向量场的轨线分支图. 相似文献
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Bogdanov-Takens系统的三次齐次扰动 总被引：3，自引：0，他引：3
对Bogdanov-Takens向量场的三次齐次扰动系统进行了讨论，得到了当其前二阶Melnikov函数恒为0时，则其后各阶Melnikov函数一定为0，且对于小的扰动参数，此系统为可积的或为Hamilton的；并对M1（h)≠0和M1(h)≡0，M2(h)≠0两种情形该系统的分岔结构给出了较全面的结论。 相似文献
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在这篇文章中,作者用Melnikov函数方法分析了软弹簧型Duffing方程[1]在摄动下异宿轨道破裂后稳定流形与不稳定流形的相对位置,给出了方程在不同摄动下分支出极限环的条件与极限环的位置. 相似文献
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利用Abelian积分的等价性原理,把一类生态系统化为Lienard方程,然后利用Hopf分支等定性理论,简便的证明了该系统无环和有唯一极限环的条件. 相似文献
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This paper is devoted to the study of limit cycles that can bifurcate of a perturbation of piecewise non-Hamiltonian systems with nonlinear switching manifold. We derive the first order Melnikov function to these systems. As application, the sharp upper bound of the number of bifurcated limit cycles of two concrete systems, whose switching manifolds are algebraic curves, is presented. 相似文献
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本文利用指数二分性理论和Liapunov－Schmidt方法,研究了当Melnikov函数具有高阶零点时的横截同宿轨道的存在性,得到了一个所谓的高阶Melnikov函数 相似文献
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研究较一般的高维退化系统的同宿、异宿轨道分支问题．利用推广的Melnikov函数、横截性理论及奇摄动理论,对具有鞍—中心型奇点的带有角变量的奇摄动系统,在角变量频率产生共振的情况下,讨论其同宿、异缩轨道的扰动下保存和横截的条件．推广和改进了一些文献的结果。 相似文献
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Jihua Yang 《Journal of Nonlinear Modeling and Analysis》2024,6(2):371-391
This paper investigates the limit cycle bifurcation problem of the pendulum equation on the cylinder of the form $dot{x}=y, dot{y}=-sin x$ under perturbations of polynomials of $sin x$, $cos x$ and $y$ of degree $n$ with a switching line $y=0$. We first prove that the corresponding first order Melnikov functions can be expressed as combinations of anti-trigonometric functions and the complete elliptic functions of first and second kind with polynomial coefficients in both the oscillatory and rotary regions for arbitrary $n$. We also verify the independence of coefficients of these polynomials. Then, the lower bounds for the number of limit cycles are obtained using their asymptotic expansions with $n=1,2,3$. 相似文献
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Peng Liu Anqi Zhou Bing Huo Xijun Liu 《Journal of Applied Analysis & Computation》2020,10(4):1355-1374
In this paper, we establish a mathematical model to describe in-plane galloping of iced transmission line with geometrical and aerodynamical nonlinearities using Hamilton principle. After Galerkin Discretization, we get a two-dimensional ordinary differential equations system, further, a near Hamiltonian system is obtained by rescaling. By calculating the coefficients of the first order Melnikov function or the Abelian integral of the near-Hamiltonian system, the number of limit cycles and their locations are obtained. We demonstrate that this model can have at least 3 limit cycles in some wind velocity. Moreover, some numerical simulations are conducted to verify the theoretical results. 相似文献
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In this short paper, we present some remarks on the role of the rstorder Melnikov functions in studying the number of limit cycles of piecewisesmooth near-Hamiltonian systems on the plane. 相似文献
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