The modified formula for the boom of large complicated bucket wheel excavator has been put forward under earthquake, included the local dynamic effect.
对大型斗轮挖掘机臂架，通过考虑局部动力效应，推导了在地震荷载作用下结构单元的修正公式。
2
The conventional method to determine the loading position on the hydraulic cylinder of main and auxiliary boom of weight-lifting attachment on excavator is qualitative analysis.
挖掘机工作装置上的主、副臂液压缸最大受力位置，以往是通过定性分析确定。
3
A new method of calculating the weight and center of gravity of boom of excavator is put forward, which has accurate and reliable result.