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| 非保守力与非完整约束对Lagrange系统Noether对称性的影响 | |
| 引用本文： | 张毅,梅凤翔. 非保守力与非完整约束对Lagrange系统Noether对称性的影响[J]. 物理学报, 2004, 53(3): 661-668 |
| 作者姓名： | 张毅 梅凤翔 |
| 作者单位： | (1)北京理工大学理学院,北京 100081; (2)苏州科技学院土木工程系,苏州 215011 |
| 基金项目： | 国家自然科学基金(批准号：10272021)及江苏省青蓝工程基金资助的课题. |
| 摘 要： | 研究非保守力和非完整约束对Lagrange系统的Noether对称性的影响. Lagrange系统受到非保守力或非完整约束作用时，系统的Noether对称性和守恒量都会发生变化. 原有的一些Noether对称性消失了，一些新的Noether对称性产生了，在一定条件下，一些Noether对称性仍保持不变. 分别给出系统的Noether对称性以及守恒量保持不变的条件，并举例说明结果的应用. 关键词：Lagrange系统非保守力非完整约束Noether对称性 |
| 关 键 词： | Lagrange系统 非保守力 非完整约束 Noether对称性 |
| 收稿时间： | 2003-08-15 |
Effects of non-conservative forces and nonholonomic constraints on Noether symmetries of a Lagrange system |
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| Zhang Yi and Mei Feng-Xiang. Effects of non-conservative forces and nonholonomic constraints on Noether symmetries of a Lagrange system[J]. Acta Physica Sinica, 2004, 53(3): 661-668 | |
| Authors: | Zhang Yi and Mei Feng-Xiang |
| Abstract: | The effects of non-conservative forces and nonholonomic constraints on Noether symmetries and conserved quantities of a Lagrange system are studied. When non-conservative forces or nonholonomic constraints are inserted in a Lagrange system, the Noether symmetries and the conserved quantities of the system may vary. Some Noether symmetries disappear, some new Noether symmetries emerge, and under certain conditions, some Noether symmetries will still remain. The conditions under which the Noether symmetries and the conserved quantities of the system will remain are given, and two examples are given to illustrate the application of the results. |
| Keywords: | Lagrange system non-conservative force nonholonomic constraint Noether symmetry |
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