中国海上油气
中國海上油氣
중국해상유기
2014年
1期
92-95
,共4页
自升式平台%桩靴滑移%桩腿%导向板%位移测量%应变测量%罗布雷300型平台
自升式平檯%樁靴滑移%樁腿%導嚮闆%位移測量%應變測量%囉佈雷300型平檯
자승식평태%장화활이%장퇴%도향판%위이측량%응변측량%라포뢰300형평태
jack-up%spudcan sliding%leg%guide%displacement measurement%strain measurement%RobrayR300 rig
以发生损伤的罗布雷300型平台为例，建立了自升式平台的整体有限元模型和桩腿-导向板接触区的局部模型，分析了桩靴滑移产生的桩腿结构各处的位移、倾斜角度及船体上下导向板处的载荷、升降装置载荷和桩腿半圆板的应力接近或达到材料弹性极限时导向板各结构的应力应变状态，提出了监测平台桩靴滑移的位移测量和应变测量技术。结果表明，桩靴滑移时下导板以下桩腿发生明显倾斜，升降装置载荷超过额定载荷，在导向板肋板处有应变变化较为缓慢的区域，可以通过应变反算桩腿-导向板接触载荷。
以髮生損傷的囉佈雷300型平檯為例，建立瞭自升式平檯的整體有限元模型和樁腿-導嚮闆接觸區的跼部模型，分析瞭樁靴滑移產生的樁腿結構各處的位移、傾斜角度及船體上下導嚮闆處的載荷、升降裝置載荷和樁腿半圓闆的應力接近或達到材料彈性極限時導嚮闆各結構的應力應變狀態，提齣瞭鑑測平檯樁靴滑移的位移測量和應變測量技術。結果錶明，樁靴滑移時下導闆以下樁腿髮生明顯傾斜，升降裝置載荷超過額定載荷，在導嚮闆肋闆處有應變變化較為緩慢的區域，可以通過應變反算樁腿-導嚮闆接觸載荷。
이발생손상적라포뢰300형평태위례，건립료자승식평태적정체유한원모형화장퇴-도향판접촉구적국부모형，분석료장화활이산생적장퇴결구각처적위이、경사각도급선체상하도향판처적재하、승강장치재하화장퇴반원판적응력접근혹체도재료탄성겁한시도향판각결구적응력응변상태，제출료감측평태장화활이적위이측량화응변측량기술。결과표명，장화활이시하도판이하장퇴발생명현경사，승강장치재하초과액정재하，재도향판륵판처유응변변화교위완만적구역，가이통과응변반산장퇴-도향판접촉재하。
To mitigate the potential risk of structuredamage by spudcan sliding,real time sliding monito-ring method is studied.Global finite element model ofRobrayR300 rig is constructed to analyze the leg dis-placement and rotation,loads on the leg-guides and onthe elevating gears induced by the sliding.Local mod-els on contact zones of leg-guide are also established tocalculate strain distribution on guides when stress onlegs reaches its material elastic limit.Accordingly,methodology on displacement monitoring of legs andstrain measurement of guides is put forward.The cal-culation demonstrates the obvious leg tilt under thelower guides,over-high loads on elevating gears andstrain smooth transition area on the ribs of the guide,which could be used to invert calculating and providethe monitoring criterions of spudcan sliding.
