机械能流及其应用

MECHANICAL ENERGY FLOW AND ITS APPLICATIONS

物体中机械能密度随时间变化时，伴随着机械能的传递，将存在机械能流。运用机械能流理论，可获得物体内机械能空间转移及应力状态的全部信息。文章通过对连续媒质中机械能转移的动力学分析，导出机械能流密度矢量Ｓ，并讨论了机械波中的机械能流。

When mechanical energy density is variable with time in an object,the mechanical energy flow is bound to follow the transmission of mechanical energy. Applying the pint of mechanical energy flow, all the information of mechanical energy transfer and the stress state in the object can be known.In this paper,the mechanical energy flow density vector S is introduced by means of dynamical analysis of mechanical energy flow flowing in continuous media and the mechanical energy flow in a mechanical wave is also discussed.