viscous equation of motion

For small disturbance, the wave equations of viscous compressible fluid are deduced from its equation of motion, equation of state, and equation of continuity. Thus it is shown there may be dissipative compressional wave and shead wave in viscous compressible fluid.

本文在小扰动条件下，从粘性可压缩流体的运动方程、状态方程以及连续性方程导出了它的波动方程，从而表明粘性可压缩流体中能够存在有耗损的纵波与横波。

Lagrange equation is applied to develop dynamic equations for the slider crank mechanism with elastic connecting rod. Viscous friction and coupling effect are considered between rigid body motion and elastic deformation of connecting rod.

利用Lagrange方程建立了曲柄滑块机构的动力学数学模型，在建模过程中考虑了连杆的弹性运动与机构刚体运动的耦合以及运动副的粘性摩擦。