西南石油大学学报(自然科学版) ›› 2005, Vol. 27 ›› Issue (3): 66-68.DOI: 10.3863/j.issn.1000-2634.2008.03.021

• 石油机械工程及其它 • 上一篇    下一篇

环境激励下的石油钻机模态分析

王颖 赵振军 宁建国   

  1. 北京理工大学机电工程学院,北京 100029
  • 收稿日期:2005-02-26 修回日期:1900-01-01 出版日期:2005-06-20 发布日期:2005-06-20
  • 通讯作者: 王颖

Modal Analysis of Drilling Rig under Ambient Excitation

WANG Ying ZHAO Zhen-jun NING Jian-guo   

  1. University of Beijing Technology, Beijing 100029, China
  • Received:2005-02-26 Revised:1900-01-01 Online:2005-06-20 Published:2005-06-20
  • Contact: WANG Ying

摘要: 针对钻机在一定转速下振动剧烈的问题,运用实验模态分析原理对ZJ70D钻机在工作状态下进行了振动测试。利用谱分析原理对环境激励下单纯利用响应信号参数识别的方法进行了研究。得出整个系统的频响函数曲线,并识别出前20阶模态频率。测试结果表明:转盘是引起钻机井架底座振动的主要原因,斜立柱是整个系统的薄弱环节,提出从转盘入手,增加转盘和方补心的同心度的方法缓解当前的振动问题。

关键词: 钻机, 振动, 模态, 测试, 环境激励

Abstract: According to testing modal analysis and spectrum analysis theories, the frequency response curves of ZJ70D drilling rig were obtained by means of dynamic testing in operational conditionals only using the ambient excitation's response, and the first 20 orders natural frequency were identified. The result of the testing indicated that the rotary was the major factor of causing the vibratory of rig derrick and substructure,and oblique upright were weak link of total system. Current vibration problem can be remitted by improving the concentricity of rotary and square-drive master bushing.

Key words: rig, vibration, modal, testing, ambient excitation

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