The theory and test proved that the impacting frequency of hydraulic rammer can be adjusted by pipe hammer stroke.The influences of stroke on characteristics of hammer are discussed.

• 通过理论和实验证明改变液压夯管锤的冲击能和冲击频率,比较简单而经济的方法是调节液压夯管锤的行程,并讨论了改变行程对液压夯管锤的性能有哪些影响。