Dynamic Response Analysis of Ocean Drilling Derrick under the Dynamic Load

Abstract:

The derrick of a drilling ship is a kind of dynamic ocean derrick which is often applied to drilling operations for ocean engineering. Comparing with land rig derrick, the operating environment of drilling derrick is more complicated with not only the regular functions of static force but also the dynamic loads induced by wind, wave and current. Therefore, this paper takes a drilling derrick as example to make clear of the dynamic characteristics of the drilling derrick under the action of dynamic loads from outside environment with the finite element software ANSYS as tool to accomplish the modal analysis of the drilling derrick. According to the natural frequency and the vibration mode of the drilling derrick after modal analysis, the deformation response and the weak parts of the drilling derrick under different motivation can be predicted, and some improving suggestions can also be illustrated as well. This paper completed the dynamic analysis of the drilling derrick by modal analysis, and moreover, the displacement response and the stress of the drilling derrick varied with time can also be obtained. As consequence, the conclusion can be taken as reference for design of the drilling derrick, safety application and life sustainment.

• Periodical: Advanced Materials Research (Volume 977)
• Pages: 387-390
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.977.387
• Online since: June 2014
• Authors: Chong Wang*, Zhi Jing Xu, Xiang Li, Ge Liu
• Keywords: Dynamic Load, Finite Element, Modal Analysis, Ocean Drilling Derrick, Transient Analysis

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