CAJ | 학술논문

为深入研究带螺旋列板的柔性立管涡激振动响应特性，进行立管螺旋列板抑制装置的拖曳水池试验。由拖车拖动立管产生来流测得应变数据，基于模态叠加法获得立管位移响应等参数。分析螺旋列板抑制装置的螺距变化，系统研究不同螺旋列板状态下立管应变、位移响应等参数。结果表明，流向响应与横向响应同样重要不可忽略；裸管响应特性与带螺旋列板的立管响应特性区别较大，响应特性与螺旋列板几何形状紧密相关。
위심입연구대라선렬판적유성립관와격진동향응특성，진행립관라선렬판억제장치적타예수지시험。유타차타동립관산생래류측득응변수거，기우모태첩가법획득립관위이향응등삼수。분석라선렬판억제장치적라거변화，계통연구불동라선렬판상태하립관응변、위이향응등삼수。결과표명，류향향응여횡향향응동양중요불가홀략；라관향응특성여대라선렬판적립관향응특성구별교대，향응특성여라선렬판궤하형상긴밀상관。
Laboratory tests were conducted on the helical strakes of a riser in order to further improve the understanding of the response performance of VIV of the riser with helical strakes.The experiment was accomplished in a towing tank and the relative current was simulated by towing the flexible riser in one direction.Based on the modal superposition method,the displacement responses were obtained by means of the measured strains.The strakes with different pitches were analyzed,and the response parameters like strain response and displacement response were studied. The analysis indicates that the in-line response is as important as the cross-flow response.The results also show that the response characteristics of a bare riser can be quite distinct from that of a riser with helical strakes,and the response performance depends on the geometrical configuration of the helical strakes closely.