中国物理B ›› 2013, Vol. 22 ›› Issue (10): 104503-104503.doi: 10.1088/1674-1056/22/10/104503

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Noether symmetry and conserved quantities of the analytical dynamics of a Cosserat thin elastic rod

王鹏a, 薛纭b, 刘宇陆a   

  1. a Shanghai Institute of Applied Mathematics and Mechanics, Shanghai University, Shanghai 200072, China;
    b School of Mechanical Engineering, Shanghai Institute of Technology, Shanghai 201418, China
  • 收稿日期:2013-01-15 修回日期:2013-04-09 出版日期:2013-08-30 发布日期:2013-08-30
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11262019 and 10972143).

Noether symmetry and conserved quantities of the analytical dynamics of a Cosserat thin elastic rod

Wang Peng (王鹏)a, Xue Yun (薛纭)b, Liu Yu-Lu (刘宇陆)a   

  1. a Shanghai Institute of Applied Mathematics and Mechanics, Shanghai University, Shanghai 200072, China;
    b School of Mechanical Engineering, Shanghai Institute of Technology, Shanghai 201418, China
  • Received:2013-01-15 Revised:2013-04-09 Online:2013-08-30 Published:2013-08-30
  • Contact: Liu Yu-Lu E-mail:ylliu@staff.shu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11262019 and 10972143).

摘要: In this paper, we investigate the Noether symmetry and Noether conservation law of elastic rod dynamics with two independent variables: time t and arc coordinate s. Starting from the Lagrange equations of Cosserat rod dynamics, the criterion of Noether symmetry with Lagrange style for rod dynamics is given and the Noether conserved quantity is obtained. Not only are the conservations of generalized moment and generalized energy obtained, but also some other integrals.

关键词: analytical mechanics, Noether symmetry, conservation laws, Cosserat elastic rod dynamics

Abstract: In this paper, we investigate the Noether symmetry and Noether conservation law of elastic rod dynamics with two independent variables: time t and arc coordinate s. Starting from the Lagrange equations of Cosserat rod dynamics, the criterion of Noether symmetry with Lagrange style for rod dynamics is given and the Noether conserved quantity is obtained. Not only are the conservations of generalized moment and generalized energy obtained, but also some other integrals.

Key words: analytical mechanics, Noether symmetry, conservation laws, Cosserat elastic rod dynamics

中图分类号:  (Lagrangian and Hamiltonian mechanics)

  • 45.20.Jj
02.20.Sv (Lie algebras of Lie groups)