【摘要】 抽油杆柱纵向振动的固有频率是影响有杆抽油系统行为的一个重要因素,其值只取决于抽油杆柱的结构、材料和边界条件,与它是否正在振动无关。美国中西部研究所在计算抽油杆柱纵向振动固有频率时,是从分析计算抽油杆柱对顶端激励的响应出发,根据发生共振的条件来确定固有频率。这种计算方法概念不清,且对多级抽油杆柱来讲显得过于复杂。从振动理论的观点出发,对抽油杆柱的纵向振动固有频率进行了分析计算,为抽油杆柱纵向振动固有频率的计算提供了一种有效的方法。更多还原

【Abstract】 The inherent frequency of longitudinal vibration of rod string is an important element which influences the behavior of rod pumping system,in addition,its value only depends on construction,material and boundary condition rod string and have nothing to do with whether or not it is vibrating.But the middle west research institute of America start from analyzing and calculating the response to top excitation when calculating the inherent frequency of longitudinal vibration of rod string,then the inherent frequency is determined according to requirement of resonance vibration.The conception of this method is not clear,and it is too complicated for multiple rod string.Therefore the inherent frequency of longitudinal vibration of rod string is analyzed and calculated from the point of view of vibration theory.An effective method is provided for the calculation of the inherent frequency of longitudinal vibration of rod string.更多还原