• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报

• 机械动力学 • 上一篇    下一篇

平板式钻井液叠层筛网自由振动分析

侯勇俊1,  王禄友1,  马俊2   

  1. 1. 西南石油大学机电工程学院  成都  610500;
    2. 重庆长安工业(集团)有限责任公司  重庆  404110
  • 收稿日期:2014-12-28 修回日期:2015-04-16 出版日期:2015-12-05 发布日期:2015-12-05
  • 通讯作者: 王禄友,男,1989年出生。主要研究方向为机械系统动力学、石油钻采机械。 E-mail:wangluyouswpu@163.com
  • 作者简介:侯勇俊,男,1967年出生,博士,教授。主要研究方向为机械系统动力学、石油钻采机械。 E-mail:hyj2643446@126.com
  • 基金资助:
    国家自然科学基金资助项目(51074132)

Free Vibration Analysis of Shale Shaker Laminated Flat-screen

HOU Yongjun1,  WANG Luyou1,  MA Jun2   

  1. 1. Southwest Petroleum University, School of Mechanical Engineering, Chengdu 610500;
    2. Chongqing Changan Industry (Group) Company Limited, Chongqing 404110
  • Received:2014-12-28 Revised:2015-04-16 Online:2015-12-05 Published:2015-12-05

摘要: 平板式钻井液叠层筛网在钻井液振动筛上得到广泛应用,研究振动筛的结构参数和安装参数对其自由振动的影响可为振动筛和筛网的设计及使用提供依据。提出将使用螺栓绷紧方法安装的筛网模型简化为弹性支承多跨单向连续矩形薄板模型,忽略筛网上的结构非线性特征,整张筛网看作由被底部橡胶支承条划分为k+1块的小矩形板组成。基于弹性矩形薄板振动理论,建立每小块矩形薄板的自由振动方程,提出各跨间薄板的连续性条件,利用传递矩阵方法推导出了整张筛网的传递方程,根据边界条件得到筛网自由振动的频率方程。对某一型号平板式叠层筛网的自由振动特征方程进行数值求解,得到不同螺栓预紧力、不同橡胶支撑条数目及刚度下筛网的固有频率,数据分析表明这三种参数均与筛网的固有频率呈正相关性,并且互相之间有一定影响。

关键词: 传递矩阵, 连续矩形板, 平板式筛网, 自由振动

Abstract: Laminated flat-screen is widely used in shale shaker, study of the influence of the structural parameters and installation parameters of the shale shaker to the free vibration of the screen can provide the basis for the design and employment of the shale shaker and screen. Elastic support multi-span continuous unidirectional rectangular plate model which is simplified by using the bolt tightening method of the screen installation model is proposed, and regardless of the structure of the nonlinear characteristics of the screen. The whole screen is divided into k+1 pieces small rectangular plates by the rubber support. Based on the elastic rectangular plate vibration theory, the free vibration equation on each piece of small rectangular plates are established, the continuity conditions of small rectangular plates between each span are put forward, the transfer function of the entire screen by using the transfer matrix method is derived, and get the free vibration frequency equation of screen according to the boundary conditions. Numerical solution for free vibration characteristic equation is conducted on a version of flat-screen to obtain the natural frequency with different magnitude of bolt preload and different numbers and stiffness of rubber support bar. Date analysis shows that these three parameters are positively correlated with the natural frequency of the screen, and have effects on each other.

Key words: continuous rectangular plate, flat-screen, free vibration, transfer matrix