数学物理学报 ›› 2000, Vol. 20 ›› Issue (1): 63-69.

• 论文 • 上一篇    下一篇

准坐标下非完整力学系统的lie对称性和守恒量

傅景礼, 刘荣万   

  1. 商丘师专物理系 河南商丘476000韶关大学物理系 广东韶关512005
  • 出版日期:2000-01-07 发布日期:2000-01-07

Lie Symmetries and conservd Quantilities of Nonholonomic Mechanical System in term of Quasi-coordinate

 FU Jing-Li, LIU Rong-Mo   

  1. department of physics,shangqiu teachers college,shangqiu,henan,476000 shaoguan university,shaoguan,guangzhou,512005
  • Online:2000-01-07 Published:2000-01-07

摘要:

研究准坐标下非完整系统的Lie对称性.首先,对准坐标下非完整力学系统定义无限小变换生成元,由微分方程在无限小变换下的不变性,建立Lie对称性的确定方程,得到结构方程并求出守恒量;其次,研究上述问题的逆问题:根据已知积分求相应的Lie对称性.举例说明结果的应用.

关键词: 分析力学, 准坐标, 非完整系统, Lie对称性, 守恒量

Abstract:

ThispaperinvolvesLiesymmetriesandconservationlawsofnonholnomicsystemsintermsofquasicoordinates.WestudiedtwokindsofproblemsonLiesymmetriesandconservedquantities.OneisthedirectproblemofLiesymmetries:findingoutthecorrespondingconservedquantityaccordingtoagivenLiesymmetry.Wegivesthedefinitionoftheinfiniteshmalgeneratorforthenonholonomicsystemsintermsofquasicoordinates.Usingtheinvarianceoftheordinarydifferentialequationsundertheinfinitesimaltransformations,establishesthedeterminingequationsoftheLiesymmetries.Obtainsthestructureequationandconservedquantities.TheanotherkindsofproblemiscalledtheinverseproblemofLiesymmetries:findoutthecorrespondingLiesymmetryaccordingtoaknownconservedquantity.Givesanexampletoillustratetheapplicationoftheresult.

Key words: Analyticalmechanics, Quasicoordinate, Liesymmetry, Conservedquantity, Nonholonomicmechanicalsystem.

中图分类号: 

  • 70F