【摘要】 研究和探讨了钻柱轴向压力随时间变化时所激发的钻柱振动问题，建立了变参数的钻柱横向振动方程，然后利用多尺度方法对这一钻柱参激振动响应及动力失稳进行了分析和计算。更多还原

【Abstract】 The author conducts an investigation in the drillstring vibration excited by the timedependent fluctuation of the axial pressure of the drillstring. sets up a variable-element equation for the lateral vibration of drillstring, and makes a study of the excited vibration response and the dynamic instability of the drillstring by using the multiple scale method.更多还原