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| 物理变分原理及其在电磁介质中的应用 | |
| 引用本文： | 匡震邦. 物理变分原理及其在电磁介质中的应用[J]. 固体力学学报, 2010, 0(Z1) |
| 作者姓名： | 匡震邦 |
| 作者单位： | 上海交通大学工程力学系; |
| 摘 要： | 和数学变分原理的意义不同,物理变分原理是物理界的客观规律,是基本规律.热力学定律是能量守恒定律,指任一自然过程的能量总是守恒的;但同时又是物理变分原理,指从一种状态变化到另一无限接近的状态,在所有可能的稳定过程中,真实过程的能量取极小值,因而又是动量定律.特别是对于存在迁移变分的过程和偏离平衡态不大的不可逆过程,物理变分原理特别有效,可以用来推求连续介质的控制方程,且尚未完全研究透彻.本文对这一原理及其在电磁介质中的某些应用进行了一些研究. |
| 关 键 词： | 热力学定律 物理变分原理 电磁介质 局部变分与迁移变分 |
PHYSICAL VARIATIONAL PRINCIPLE AND ITS APPLICATION IN ELECTRO-MAGNETO-ELASTIC MEDIA |
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| Zhenbang Kuang. PHYSICAL VARIATIONAL PRINCIPLE AND ITS APPLICATION IN ELECTRO-MAGNETO-ELASTIC MEDIA[J]. Acta Mechnica Solida Sinica, 2010, 0(Z1) | |
| Authors: | Zhenbang Kuang |
| Affiliation: | Zhenbang Kuang(Department of Engineering Mechanics,Shanghai Jiaotong University,Shanghai,200240) |
| Abstract: | In contrast to the mathematical variational principle the physical variational principle is a basic objective physical law.The first law of thermodynamics is an energy conservation law,which means that in any natural process the energy of the system is conservation.But this law is also a physical variational principle which means that the energy takes the minimum value in a stationary process for all possible process from a state to other neighboring state.The physical variational principle is a momentum la... |
| Keywords: | thermodynamics law physical variational principle electromagnetic media local variation and migratory variation. |
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