气动冲击机构动力过程的无量纲运动方程及相似准则

Non-dimensional kinematic equation for dymamic process of pneumatic impact mechanism and the similarty criteria

以无阀气动冲击机构为例，推求了气动冲击机构动力过程的无量纲运动做分方程。分析表明，无量纲方程给动力过程的数值求解会带来很大方便，而且无量纲方程还揭示了动力过程的相似准则。这种方程描述的不是具体的某一组系统参数下的动力过程。

The paper has been illustrated the process establishing the non-dimensional differencial equation of the pneumatic impact mech-anisms by taking the valveless pneumatic impact mechamismas an examale. Analyzing shows that the equation has manyadvantages to solvel values in the prmess,and in addition, hasrevealed the similarity criteria obtained from dynamic process.This equation doesn't represent a specific system with givenphysical parameters, but meets all systems having the samevalues of the similarity criteria