Abstract: FEM analyses are carried out to calculate the strength,stiffness and inherent vibration property of model F 1300 triplex drilling pump framework by using SAP5/LISA software.The stress and deformation distribution in every part of the framework under rate load,and the model frequencies of several minimum orders as well as the vibration modes are obtained.The results show that the entire of the framework structure is not even,its strength and stiffness are abundant.The vibration modes show only the stiffness of the pump head and end opening part of the framework is weak,and the middle and inner part of the pump is rigid enough.The structure of the framework is not good.The work of this paper can be used for the design of model F 1300 drilling pump.

Key words: drilling pump, framework, strength analysis, stiffness analysis, modal analysis, finite element, free vibration

摘要： 本文应用SAP5/LISA结构分析程序,对F1300型三缸泵机架的强度、刚度和固有振动特性进行了有限元分析,获得了机架在额定载荷作用下各部位的应力和变形的分布规律,及自由振动时的最小几阶模态频率和模态振型.计算结果表明,整个机架结构应力、变形不均匀,强度、刚度富余.振型分析表明,机架结构只是泵头和泵尾开口部位动刚度偏弱,而泵中部和内部则刚度过剩,泵体的质量和刚度分布不合理.为F1300型钻井泵的改造、进行动态特性分析和动态设计提供了必要的依据.

关键词: 钻井泵, 机架, 强度分析, 刚度分析, 模态分析, 动特性分析, 有限元法