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隔水管非线性振动的线性化分析
引用本文:仇伟德,吕英民,蔡强康.隔水管非线性振动的线性化分析[J].中国石油大学学报(自然科学版),1987(3).
作者姓名:仇伟德  吕英民  蔡强康
作者单位:华东石油学院力学教研室 (仇伟德,吕英民),华东石油学院力学教研室(蔡强康)
摘    要:本文在规则波浪与海流联合作用下对海洋钻井隔水管进行了动力分析,对非线性拖曳力采用改进的线性化方法,推导了有限元线性振动方程。求解这些方程几乎象静力方程一样,只需要少数几次迭代就可求得响应最大值。同时给出一些规则波浪与海流联合作用下的算例,并对由本文方法和由非线性时间域动力分析方法分别求得的两种结果进行了比较。比较表明,两种计算结果吻合。本文的线性化方法及把动力方程变换为静力方程的方法,能节约计算机时。隔水管是海洋工程中较典型的构件,该分析方法便于实际应用。

关 键 词:隔水套管  非线性振动  线性化  分析  海上钻进  钻具

LINEAR ANALYSIS OF NONLINEAR VIBRATION OF MARINE DRILLING RISER
Qiu Weide Lii Yingmin.LINEAR ANALYSIS OF NONLINEAR VIBRATION OF MARINE DRILLING RISER[J].Journal of China University of Petroleum,1987(3).
Authors:Qiu Weide Lii Yingmin
Institution:Qiu Weide Lii Yingmin
Abstract:Dynamic analysis of marine drilling riser system excited byregular wave and current is presented in this paper. An improved linearization method is applied to solve nonlinear hydrodynamic drag term. Using finite element method the linearized vibration equtions have been derived. These equations can be solved just like static equation which requires only a few iterations, thus the maximum response can be obtained. Some examples are presented for comparing the results from presented method with that from time domain nonliear dynamic analysis. The results obtained from two methods are in good agreement. This linearization method and computer program can be conveniently used in practice.
Keywords:Marine riser casing  Non-linear vibrication  Linearization  Analysis  Offshore drilling  Drilling tool
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