학술논문
某450 T海洋井架的谐响应分析 / Harmonic Response Analysis on a 450T Marine Derrick
Document Type
Academic Journal
Author
Source
石油机械 / China Petroleum Machinery. (6):75-95
Subject
Language
Chinese
ISSN
1001-4578
Abstract
海洋钻机井架所处工作环境异常恶劣,不仅承受静载荷的作用,还要承载大量的诸如平台动态设备激励、 风载和海浪等动载荷的作用.在谐响应理论分析的基础上,在有限元软件中采用直接法建立了某450T海洋井架模型,对模型中的3个节点X和Z方向位移进行分析.分析结果表明,第72节点和第2037节点X方向位移均大于Z方向位移,说明井架X方向刚度较Z方向差;井架顶部第3853节点附近位移均很小,说明井架工作中不会产生较大的强迫振动.所得结论为海洋井架的优化设计、 强度校核和安全性评定提供了依据.
Owing to the extremely bad working environment, the marine derrick withstands not only the static load but also a large number of dynamic loads such as platform dynamic equipment excitation, wind loads and waves. Based on the harmonic response analysis, a 450T marine derrick model has been established using the di-rect method by the finite element software. The X and Z direction displacement of three nodes of the model have been analyzed. The results show that the 72 nodes and 2037 nodes'X direction displacements are larger than the Z-direction displacement, indicating that the rigidity of X direction of derrick is lower than the Z-direction. The dis-placements around 3853 node on the top of the derrick are very small, indicating that the derrick would not have a great forced vibration at working condition. The conclusions could provide bases for the design optimization, strength check and safety assessment of marine derrick.
Owing to the extremely bad working environment, the marine derrick withstands not only the static load but also a large number of dynamic loads such as platform dynamic equipment excitation, wind loads and waves. Based on the harmonic response analysis, a 450T marine derrick model has been established using the di-rect method by the finite element software. The X and Z direction displacement of three nodes of the model have been analyzed. The results show that the 72 nodes and 2037 nodes'X direction displacements are larger than the Z-direction displacement, indicating that the rigidity of X direction of derrick is lower than the Z-direction. The dis-placements around 3853 node on the top of the derrick are very small, indicating that the derrick would not have a great forced vibration at working condition. The conclusions could provide bases for the design optimization, strength check and safety assessment of marine derrick.