This study proposes three support schemes for offshore mobile self-installing platforms:frame support with riser external installed(REI),frame support with riser internal installed(RII)and riser-tensioned support(RTS).Using finite element analysis software ANSYS,corresponding coupled analysis models of the platform were established to conduct modal and static analyses of the platform structure.A comparative study of the overall performance of the three support schemes was then conducted.Results indicate that the differences in natural vibration periods between the platforms with the REI and RII are negligible,while RTS leads to low-frequency vibrations of the riser.The REI support scheme demonstrates the best overall performance among the three,making it a preferred design choice for the wellhead area of offshore mobile self-installing platforms.
关键词
海洋移动式平台/自安装平台/隔水管/支撑方案/自振周期/平台井口
Key words
offshore mobile platform/self-installing platform/riser/support scheme/natural vibration period/platform wellhead
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