基于模态分析的海洋钻机井架结构动力修改
The Dynamic Modification of Derrick Structure of Offshore Drilling Rig Based on Modal Analysis
DOI: 10.12677/JOGT.2016.384041, PDF, HTML, XML, 下载: 1,540  浏览: 3,143  国家科技经费支持
作者: 吴 寒：西南石油大学机电工程学院，四川 成都 ；华 剑：长江大学机械工程学院，湖北 荆州；王 晶：中海石油(中国)有限公司上海分公司工程技术作业中心，上海
关键词: 海洋钻机；井架；模态分析；灵敏度分析；结构动力修改；Offshore Drilling Rig； Derrick； Modal Analysis； Sensitivity Analysis； Structural Dynamic Modification
摘要: 通过对450T海洋钻机井架的模态分析得知，该井架部分模态频率与转盘工作频率符合。为避免结构共振，基于灵敏度分析和结构动力修改的基本原理，分析了井架模态频率对部分杆件截面参数的灵敏度，在此基础上通过修改杆件截面参数完成了井架结构动力修改。结果表明，修改后井架的模态频率发生了改变，其中第3阶模态频率由3.43 Hz上升到3.59 Hz，第4阶模态频率由4.34 Hz上升到4.49 Hz，将有效改善井架的结构动态特性。
Abstract: The modal analysis for derrick structure of 450T offshore drilling rig showed that some modal frequencies of the derrick were coincident with the working frequencies of the rotary table. To avoid structure resonance of the derrick, based on sensitivity analysis and the fundamental theory of structural dynamic modification, the modal frequency sensitivity of the derrick to the sectional parameters of structural components was analyzed; then through modifying the sectional para-meter of structural components, the structural dynamic modification of the derrick is carried out. Result shows that the modal frequencies of the modified derrick are changed; and the 3rd order modal frequency is raised from 3.43 Hz to 3.59 Hz; the 4th order modal frequency is raised from 4.34 Hz to 4.49 Hz; thus the dynamic characteristics of the derrick are effectively improved.
文章引用：吴寒, 华剑, 王晶. 基于模态分析的海洋钻机井架结构动力修改[J]. 石油天然气学报, 2016, 38(4): 90-96. http://dx.doi.org/10.12677/JOGT.2016.384041

参考文献

[1] 张希农. 局部结构动力修改的频率响应函数方法[J]. 应用力学学报, 1991, 8(2): 58-65.
[2] 姚爱英, 熊晓燕, 王然风, 等. 大型带钢轧机动态特性分析与动力学修改[J]. 振动、测试与诊断, 2012, 32(4): 680- 683.
[3] Chen, J.C. (1983) Direct Structural Parameter Identification by Modal Test Results. AIAA Journal, 9, 1481-1486. https://doi.org/10.2514/6.1983-812
[4] 杨明, 杨橚. 局部结构动力修改的频率响应函数方法[J]. 计算结构力学及其应用, 1987, 4(2): 63-74.
[5] Berman, A. (1979) Mass Matrix Correction Using an Incomplete Set of Measured Modes. AIAA Journal, 17, 1147- 1148. https://doi.org/10.2514/3.61290
[6] Baruch, M. (1982) Optimal Correction of Mass and Stiffness Matrices Using Measured Modes. AIAA Journal, 20, 1623-1626. https://doi.org/10.2514/3.7995
[7] Lin, R.M., Du, H. and Ong, J.H. (1993) Sensitivity Based Method for Structural Dynamic Model Improvement. Computers & Structures, 47, 349-369. https://doi.org/10.1016/0045-7949(93)90231-2
[8] 齐丕骞, 张凌霞. 基于灵敏度分析的结构动力模型修改[J]. 航空学报, 1992, 13(9): 472-475.
[9] 王飞朝. 基于有限元模型的结构动力修改程序开发[J]. 西安科技大学学报, 2007, 27(3): 58-65.
[10] 丁莉芬, 缪龙秀. 基于灵敏度分析的结构动力修改方法研究[J]. 铁道学报, 1999, 21(4): 17-19.
[11] 郭谊民. 结构动力修改在车装钻机井架设计中的应用[J]. 石油机械, 2005, 33(2): 24-26.