液压凿岩机工作时，冲击机构的能量损失对其效率有很大的影响。
The energy loss of the impact mechanism of hydraulic rock drill greatly affects drilling efficiency when it operates.
电动凿岩机冲击机构因其受力过程比较复杂，至今尚无一套可行的计算方法。
Since the process of colliding mechanism of electric rock drill is complex, there isn't a set of calculating method practically still now.
本文以我国首创的蛙式打夯机为例，对自行式摆动冲击机构的非线性动力学进行了研究。
In this paper, the nonlinear dynamics of Selfpropelled machines with rocked impact, taking Frog rammer which was first devised in our country as an example, is studied.
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