不同浪向下导管架下水过程的动力学分析  

Dynamic analysis for jacket launching under different wave directions

作　　者：张大朋[1] 白勇[1] 朱克强[2] 刘建[2] 桂琴琴[2] 

机构地区：[1]浙江大学建工学院,浙江杭州310058 [2]宁波大学海运学院,浙江宁波315211

出　　处：《石油工程建设》2017年第5期7-13,18,共8页Petroleum Engineering Construction

基　　金：长江学者和创新团队发展计划项目(IRT0734);国家自然科学基金资助项目(11272160);近岸孔隙结构物内流体运动特征的SPH数值模拟研究(Q16E090001)资助

摘　　要：导管架下水过程较为复杂,操作不慎会有可能发生触底现象。为提高施工的安全性和可靠性,需要对导管架的下水过程进行分析。基于凝集质量法,将导管架离散成凝集质量模型,参照管架结构具体参数,结合导管架下水的具体过程,通过必要的简化,利用动力学分析软件Orca Flex建立了不同浪向下导管架下水过程的动力学模型,发现浪向的变化对导管架下水过程有着非常明显的影响:不同浪向下,导管架脱离驳船甲板滑入海水中的时刻不尽相同,且与甲板的接触力也不尽相同;浪向的改变对导管架质心轨迹在水平面内的影响较大,而在竖直高度上导管架质心的位置变化随着浪向的改变在时域上会有所不同,但其质心高度位置图像整体呈现一定的相似性,等。计算结果对研究导管架下水有一定的指导意义,可为研究导管架下水提供技术支持。Jacket launching is a complex process,jacket may touch seabed due to incorrect operation.In order to increase the safety and reliability of construction,it is necessary to analyze the jacket launching process.Based on the lumped mass method and the specific structure parameters of a certain jacket,the jacket is discretized into the lumped mass model.Combined with the specific process of launching jacket and by means of necessary simplification,the dynamic model of the jacket during the launching process under different wave directions has been established by Orca Flex software.It is found that the change of wave direction affects the launching process obviously：the time of the jacket sliding into sea from the barge deck changes with deferent wave direction,the influence of wave direction change on the jacket mass center curve in horizontal plane is big;and the jacket mass center in vertical plane changes with different wave direction in time-domain,but the mass center curves have certain similarity.The calculation results have a certain guiding significance for the study of the jacket launching.It can provide technical support for the study of the jacket launching.

关 键 词：凝集质量法 OrcaFlex 导管架下水 动力学分析 

分 类 号：TE95[石油与天然气工程—石油机械设备]