对现役钻机底座做了现场振动测试，得到频响函数曲线及前10阶模态频率。
On-site vibration test of the servicing rig substructure is made, and the frequency response function curve and preceding 10 modes frequency are obtained.
钻柱将其扭转振动传至钻机动力头，引起动力头齿轮传动系统的非线性振动。
The BHA transmits its torsional vibration to the gear system of drill power pack and brings about nonlinear vibration.
建立了该钻机井架与钻台结合体固有振动特性理论分析的有限元模型并给出了其固有振动频率结果和相应的主振型。
The finite model of the derrick and drilling platform connecting unit is built and the natural vibration frequency and the corresponding vibration mode of it are given here.
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