摘要
By the theory of symmetries and conserved quantities, the exact invariants and adiabatic invariants of nonholonomic variable mass systems are studied. The perturbation problem of symmetries for the nonholonomic variable mass systems under small excitation is discussed. The concept of high order adiabatic invariant is presented, and the form of exact invariants and adiabatic invariants as well as the conditions for their existence are given. Then the corresponding inverse problem is studied.
用力学系统的对称性与守恒量理论 ,研究变质量非完整力学系统的精确不变量和绝热不变量 .针对小干扰力作用下变质量非完整力学系统对称性的摄动问题 ,提出了高阶绝热不变量的概念 ,给出了精确不变量和各阶绝热不变量的形式及存在条件 ,并研究了相关结论的逆问题 .
基金
NationalNaturalScienceFoundation (19972 0 10 )
FundofResearchonDoctoralProgramsinInstitutionsofHigherLearning(2 0 2 0 8)
