中国物理B ›› 2012, Vol. 21 ›› Issue (6): 64501-064501.doi: 10.1088/1674-1056/21/6/064501
• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇 下一篇
吴惠彬, 梅凤翔
Wu Hui-Bin(吴惠彬)† and Mei Feng-Xiang(梅凤翔)
摘要: The symmetry of Lagrangians of a holonomic variable mass system is studied. Firstly, the differential equations of motion of the system are established. Secondly, the definition and the criterion of the symmetry of the system are presented. Thirdly, the conditions under which there exists a conserved quantity deduced by the symmetry are obtained. The form of the conserved quantity is the same as that of the constant mass Lagrange system. Finally, an example is shown to illustrate the application of the result.
中图分类号: (Lagrangian and Hamiltonian mechanics)