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arXiv 0812.0341math-phgr-qcmath.MPphysics.class-ph
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非保守力学系统的可积性与变分形式

Integrability and the variational formulation of non-conservative mechanical systems

David Delphenich

摘要:

它表明,一个可以获得正则定义的非保守力学系统的动力学方程开始与第一变分功能,而不是一个行动的功能,并找到他们的零点。第一变分泛函的核作为积分泛函,是运动学状态流形上的1-形式,从而表示系统的动力学状态。如果1-形式是精确的,那么第一个变分泛函以通常的方式与动作泛函的第一个变分相关联。然后,动力学方程从作用于动力学状态的斯宾塞算子的对偶的消失中得出。这个算子又与运动学状态的可积性有关。该方法适用于阻尼振荡器的建模。

英文摘要:

It is shown that one can obtain canonically-defined dynamical equations for non-conservative mechanical systems by starting with a first variation functional, instead of an action functional, and finding their zeroes. The kernel of the first variation functional, as an integral functional, is a 1-form on the manifold of kinematical states, which then represents the dynamical state of the system. If the 1-form is exact then the first variation functional is associated with the first variation of an action functional in the usual manner. The dynamical equations then follow from the vanishing of the dual of the Spencer operator that acts on the dynamical state. This operator, in turn, relates to the integrability of the kinematical states. The method is applied to the modeling of damped oscillators.

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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