导管架平台火炬臂冰激振动响应数值分析

Numerical Analysis of Ice Induced Vibration Response of Flare Boom of Jacket Platform

针对渤海某浅水重冰区导管架平台火炬臂的冰激振动问题,提出了一种基于有限元的时域分析方法。该方法根据导管架平台火炬臂的结构特征,对导管架平台与火炬臂这一主从动力系统中的主结构和子结构分别进行瞬态动力分析,从而实现对火炬臂冰激振动响应的准确评估。计算结果表明:火炬臂的动力响应与平台整体结构的动力响应之间有着明显的“继承”关系,并具有显著的动力放大特征,可为渤海浅水重冰区平台设计提供参考和借鉴。

For analyzing the flame boom ice induced vibration of a jacket platform in shallow water and heavy ice area in Bohai Sea,one time domain analysis method was proposed based on the finite element method.According to the structure characteristics of the flame boom of the jacket platform,the transient dynamic analyses on the main structure jacket platform and the substructure flame boom,a master-slave dynamic system,were carried out respectively,so as to evaluate the ice-induced vibration response of the flame boom accurately.The calculation results showed that there is an obvious“inheritance”relationship between the dynamic response of the flare boom and the one of the whole platform structure.Moreover,the dynamic amplification characteristics between these two structures were remarkable.The work carried out in this paper could provide reference for the platform design in the shallow water and heavy ice area in Bohai Sea.