arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 1002.2727math.NAcs.NA
收藏

Gauss-Legendre方法与定义在Gauss点上的Hamiltonian BVMs的数值比较

Numerical comparisons between Gauss-Legendre methods and Hamiltonian BVMs defined over Gauss points

Dipartimento di Matematica “U. Dini” Università di Firenze(佛罗伦萨大学乌·迪尼数学系);Dipartimento di Matematica Università di Bari(巴里大学数学系)

Luigi Brugnano, Felice Iavernaro, Tiziana Susca

AI总结:

本文介绍Hamiltonian边值方法(HBVMs)作为一类新的能量守恒单步法,用于求解多项式Hamiltonian动力系统,并通过数值测试展示其在精确守恒Hamiltonian函数方面的优势。

摘要:

Hamiltonian边值方法是一类新的能量守恒单步法,用于求解多项式Hamiltonian动力系统。它们可以被视为配置方法的推广,通过施加一组适当的扩展配置条件来定义。特别地,按照本文描述的方式,它们与Gauss配置方法相关,区别在于它们能够在Hamiltonian函数是动量和广义坐标的任意高次多项式时精确守恒该函数。在描述这些新公式之后,通过几个测试问题展示了在许多相关情况下,精确守恒Hamiltonian函数对于在计算机上模拟理论解的正确行为至关重要。

英文摘要:

Hamiltonian Boundary Value Methods are a new class of energy preserving one step methods for the solution of polynomial Hamiltonian dynamical systems. They can be thought of as a generalization of collocation methods in that they may be defined by imposing a suitable set of extended collocation conditions. In particular, in the way they are described in this note, they are related to Gauss collocation methods with the difference that they are able to precisely conserve the Hamiltonian function in the case where this is a polynomial of any high degree in the momenta and in the generalized coordinates. A description of these new formulas is followed by a few test problems showing how, in many relevant situations, the precise conservation of the Hamiltonian is crucial to simulate on a computer the correct behavior of the theoretical solutions.

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。

↑