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arXiv 1408.6028nlin.SI
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刚体运动一种可积情形的相拓扑

Phase topology of one integrable case of the rigid body motion

Mikhail P. Kharlamov

摘要:

将流体中刚体运动的Clebsch问题简化为面积积分为零的中心牛顿场中刚体绕固定质心的运动,其简化系统是一个完全可积的两自由度自然力学系统。给出了该系统的相拓扑,包括构造了两个关于速度的二次积分的分支集,描述了积分环的所有类型的分支。我们建立了所有奇异积分曲面的拓扑。使用当代语言,可以说这是第一次描述$B$($T^2\to 2T^2$)和$C_2$($2T^2 \to 2T^2$)类型的分叉,后者也见arXiv:1408.4548。本文研究了在连通临界积分曲面上具有两个平衡点的鞍型奇点的不变邻域的积分曲面的叶理。

英文摘要:

The reduced system in the Clebsch problem of the motion of a rigid body in fluid treated as the motion of a rigid body about its fixed mass center in a central Newtonian field with zero value of the area integral is a completely integrable natural mechanical system with two degrees of freedom. We find out the phase topology of this system including constructing the bifurcation set of two integrals quadratic with respect to velocities and describing all types of bifurcations of the integral tori. We establish the topology of all singular integral surfaces. Using the contemporary language, one can say that this is the first description of the bifurcations of the types $B$ ($T^2\to 2T^2$) and $C_2$ ($2T^2 \to 2T^2$), for the latter see also arXiv:1408.4548. This investigation includes the description of the foliation into integral surfaces of an invariant neighborhood of a saddle type singularity having two equilibriums on the connected critical integral surface.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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