Renewal of Basic Laws and Principles for Polar Continuum Theories(Ⅹ)—Master Balance Law
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摘要: 通过对诸主均衡定律和应用Noether定理得出的守恒定律进行比较,自然地导出微极连续统力学的1个统一的主均衡定律和6个物理上可能的均衡方程.其中,通过扩展众所周知和惯用的能量动量张量的概念,得到相当一般的定名为能量-动量的、能量-角动量的和能量-能量的守恒定律和均衡方程.显然,在这后3种情况下的主均衡定律中,物理场量是难以凭借直觉假定出来的.最后,作为特殊情形,直接推演出若干现有的结果.Abstract: Through a comparison between the expressions of master balance laws and the conservation laws derived by the use of Noether. s thorem a unified master balance law and six physically possible balance equations for micropolar continuum mechanics are naturally deduced. Among them, by extending the well-known conventional concept of energy-momentum tensor, the rather general conservation laws and balance equations named after energy-momentum, energy-angular momentum and energy-energy are obtained. It is clear that the forms of the physical field quantities in the master balance law for the last three cases could not be assumed directly perceived through the intuition. Finally, some existing results are reduced immediately as special cases.
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