LNG再气化模块动设备基础及支撑结构振动研究

Research on Vibration of LNG Regasification Module Dynamic Equipment Foundation and Support Structure

为探究LNG再气化模块动设备基础及支撑结构振动问题,参考相关标准、法规和指南,对某浮式储存及再气化装置(FSRU)上的高压离心泵设备基础及相连支撑结构的振动问题进行研究。首先,采用设计软件SACS,建立等效结构模型;然后,通过结构动力分析,先后使用共振判别法和响应判别法对系统可能存在的有害振动进行了分析和预报;最后,根据分析结果给出了结论和建议。研究结果表明:在工程应用阶段,该有害振动预报和评估方法能够对海上装备结构设计及营运时的设备运维提供技术参考,起到辅助性作用。

In order to explore the vibration problems of the dynamic equipment foundation and supporting structure of the LNG regasification module,the vibration problems of the high pressure centrifugal pump equipment foundation and the connected supporting structure on a FSRU are studied with reference to relevant standards,regulations and guidelines. First,the design software SACS is used to establish the equivalent structure model. Then through the structural dynamic analysis,the possible harmful vibration of the system is analyzed and predicted by using the resonance discrimination method and the response discrimination method successively. Finally,conclusions and suggestions are given based on the analysis results. The research results show that in the engineering application stage,this forecasting and evaluation method can provide technical reference for the structural design of offshore equipment and equipment operation and maintenance during operation,and play an auxiliary role.