摘要
建立了新的研究抽油杆柱纵向振动特性的力学模型,研究了抽油杆柱自由振动的固有频率以及抽油杆柱对各种激励的稳态响应。建立了单级杆柱第i阶固有频率pi和基频p0之间的关系,即pi=(2i-1)p0,指出了单级抽油杆柱产生共振的条件是激励频率等于基频的奇数倍,证明了“APIRP11L有杆抽油系统的设计计算推荐方法”中关于激励频率等于偶数倍基频时单级抽油杆柱将产生共振的结论是错误的,并指出了导致这一错误结论的根本原因是采用的力学模型是错误的。
A new mechanical model used to study the longitudial vibration property of the rod string is set up,and the natural frequency and the steady responses to exciting forces are studied.The relation of the first stage natural frequency with the basic frequency is set up,that is, p i=(2i-1)p 0 . The resonance condition of the single stage rod string is that the exciting frequency is equal to odd times of the basic frequency.The vibration properties of the rod string were also studied in API RP IIL,and the resonance condition of the single stage rod string is that the exciting frequency is equal to the even times of the basic frequency.It is demonstrated by theoretically analyzing and deducing that the conclusion of API PR IIL is wrong, the wrong conclusion is made because the mechanical model used by API is wrong.
出处
《大庆石油学院学报》
EI
CAS
北大核心
1998年第2期47-50,共4页
Journal of Daqing Petroleum Institute
基金
中国石油天然气总公司"九五"攻关课题
关键词
抽油杆柱
振动特性
API标准
力学模型
rod string, vibration property, API standard, mechanical model