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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 |
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 |
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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.
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Received: 15 January 2013
Revised: 09 April 2013
Accepted manuscript online:
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PACS:
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45.20.Jj
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(Lagrangian and Hamiltonian mechanics)
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02.20.Sv
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(Lie algebras of Lie groups)
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Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11262019 and 10972143). |
Corresponding Authors:
Liu Yu-Lu
E-mail: ylliu@staff.shu.edu.cn
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Cite this article:
Wang Peng (王鹏), Xue Yun (薛纭), Liu Yu-Lu (刘宇陆) Noether symmetry and conserved quantities of the analytical dynamics of a Cosserat thin elastic rod 2013 Chin. Phys. B 22 104503
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